JPWO2018092559A1 - Disposable wearing article and manufacturing method - Google Patents

Abstract

A pants-type disposable wearing article comprising a front waistline (3) and a back waistline (3) adapted to cover a wearer's torso, and the front and back waistlines Each of the front and rear waist portions includes a plurality of elastic members (32) extending in the waist direction (X) between two sheet pieces (31). In the state where the elastic member is contracted, a plurality of ridges (P) appear between the plurality of joint portions (41, 42, 43), and the front and rear waist portions overlap each other. The end portion (E3) of the front waistline portion and the end portion (E3) of the rear waistline portion are welded and joined to each other by the side seal (5), and the first closest to the side seal among the plurality of joint portions. 1st space | interval of the expansion-contraction direction of 1 joining part (41) and a side seal ( 1), a second joint portion that are adjacent to each other in the intermediate portion between the ends of the waist section (42) smaller than the expansion and contraction direction of the second distance between (S2).

Description

  The present invention relates to a so-called pants-type disposable wearing article and a manufacturing method.

  In the invention of Patent Document 1 below, a plurality of elastic members are sandwiched between two sheets, and the two sheets and the elastic members are welded at a large number of joints that are continuous in a direction intersecting the expansion and contraction direction of the elastic members. Yes.

JP2014-198180A (front page)

When this prior art stretchable sheet is used in the waistline part of a pants-type wearing article, the front and back waistline parts are connected to each other by side seals at each end of the waistline part. When cutting at the time of individual separation after the side seal, the elastic member may be cut, and the elastic member may contract (so-called snap back) to the joint portion closest to each end.

If the elastic member is not fixed to the sheet with a sufficient bonding force at the joint closest to the end, the elastic member further contracts to the adjacent joint at the time of snapback, and a snapback chain is generated. Due to such a phenomenon, the yield of the worn article is reduced, and quality variation occurs.

In the prior art, in order to secure the fixing force of the elastic member, it is proposed to reinforce the fixing of the elastic member with an adhesive. However, when an adhesive is used, air permeability is impaired, and the stretchable sheet serving as the waistline portion loses flexibility due to the adhesive. Therefore, it becomes a factor which a feeling of wear falls.

An object of the present invention is to provide a disposable wearing article and a manufacturing method which can suppress a decrease in yield of the wearing article and variations in quality and have an excellent wearing feeling.

A pants-type disposable wearing article,
The wearing article 1 includes a front waistline portion 3 and a rear waistline portion 3 adapted to cover a wearer's torso, and an absorbent main body 2 constructed on the front and back waistline portions 3.
Each of the front and rear waistline portions 3 is formed by sandwiching a plurality of elastic members 32 extending in the waistline direction X between two sheet pieces 31,
The two sheet pieces 31 are joined to each other in a welded structure, and three or more stripe-like joining portions 41, 42, 43 for fixing the elastic member 32 to the two sheet pieces 31 include the elastic member. Is provided continuously in a direction Dp that intersects 32 expansion and contraction directions Df,
In a state where the elastic member 32 is contracted, a plurality of ridges P appear between the three or more stripe-shaped joint portions 41, 42, 43,
The front and rear waistline portions 3 are overlapped with each other, and an end portion E3 of the front waistline portion 3 in the waistline direction X and an end portion E3 of the rear waistline portion 3 in the waistline direction X are welded to each other by side seals 5. Are joined,
Of the three or more stripe-like joint portions 41, 42, 43, the first interval S1 in the expansion / contraction direction Df between the first joint portion 41 closest to the side seal 5 and the side seal 5 is the 3 Of the two or more stripe-shaped joint portions 41, 42, 43, the second in the expansion / contraction direction Df of the plurality of second joint portions 42 that are adjacent to each other in the intermediate portion between the end portions E3, E3 of the waistline portion 3. It is smaller than the interval S2.

According to the present invention, the first interval S1 is smaller than the second interval S2. Therefore, even if the elastic member snaps back when the elastic member 32 is melted by the side seal or cut separately after the side seal, the contraction force at the time of snap back is small. Therefore, the snap-backed elastic member 32 can be fixed by the first joint portion 41 to suppress the snap-back chain.

FIG. 1 is a front view of a wearing article according to Example 1 of the present invention and shown in a state where an elastic member is stretched in the waistline direction. FIG. 2 is a front view showing an unfolded state where the end of the wearing article is not joined by a side seal. FIG. 3A is an enlarged front view of an intermediate portion of the wearing article, FIG. 3C is an enlarged front view of an end portion of the wearing article, and FIGS. 3B and 3D are conceptual cross-sectional views showing the heels of the front and rear waist parts. . FIG. 4 is a schematic plan view showing a series of manufacturing methods. FIG. 5 is a plan view showing a method for generating a waistline continuum. FIG. 6 is a plan view showing a method for generating a pants-type wearing article from the waistline continuum. FIG. 7A is a front view showing another example of a worn article, and FIG. 7B is an enlarged front view of an end portion of the worn article.

1-3A, FIG. 3C, FIG. 7A and FIG. 7B, each joint is shown in gray.
In FIG. 1, FIG. 2, FIG. 3C, FIG. 7A and FIG.
In FIG. 4, illustration of each joint and side seal is omitted.
In order to make the drawings easier to see, the numbers of side seals and joints are reduced in each drawing. Moreover, in each figure, the width | variety and space | interval of each junction part with respect to the magnitude | size of a wearing article are enlarged and shown in figure.

Preferably, of the three or more stripe-shaped joint portions 41 to 43, a third interval S3 in the expansion / contraction direction Df between the third joint portion 43 adjacent to the first joint portion 41 and the first joint portion 41. Is smaller than the second interval S2.

In this case, the interval between the joints near the side seal is narrow. Therefore, there is a high possibility that the elastic member can be fixed at the first or third joint near the side seal. Therefore, the snapback at the time of side sealing can be suppressed small.

Preferably, the two sheet pieces 31 are joined to each other in a welded structure, and a plurality of fourth joining portions 44 for fixing the elastic member 32 to the two sheet pieces 31 are provided in the direction of expansion and contraction of the elastic member 32. Provided continuously in a direction Dp intersecting Df;
In the seal region A5 of the end portion E3 where the side seal 5 is disposed, the fourth joint portion 44 is disposed so as to overlap a part of the side seal 5.
In this case, snapback could be further suppressed.
In this case, normally, the rigidity of the side seal 5 is larger than the rigidity of the joint portion, so that no wrinkles will be formed in the seal region.

Preferably, in the seal region A5 of the end E3 where the side seal 5 is disposed, all of the three or more stripe-shaped joint portions 41 to 43 are disposed without overlapping the side seal 5. In this case, the rigidity at the end portion is small, and for example, the wear feeling when the wearer lies down will be improved.

Preferably, a plurality of fifth joint portions 45 that join the two sheet pieces 31 to each other in a welded structure and fix the elastic member 32 to the two sheet pieces 31 are provided in a direction in which the elastic member 32 extends and contracts. Provided continuously in a direction Dp intersecting Df;
The plurality of fifth joint portions 45 are disposed on the opposite side of the first joint portion 41 with respect to the third joint portion 43 with respect to the expansion / contraction direction Df,
A fourth interval S4 in the expansion / contraction direction Df between the fifth joint 45 adjacent to the third joint 43 and the third joint among the plurality of fifth joints 45, and the third joint 43 At least one of the fourth distances S4 in the expansion / contraction direction Df between the plurality of fifth joints 45 in the vicinity of is smaller than the second distance S2.
For example, when the joint portion is not provided in the seal region, the elastic member may be more easily contracted to the center side than the third joint portion at the time of snapback compared to the case where the joint portion is provided in the region. unknown. Therefore, it may be preferable to provide the fifth joint in the vicinity of the third joint on the side opposite to the first joint.

In these cases, since the gap between the joints in the vicinity of the side seal is narrow, the height of the ridge formed when the elastic sheet (two sheet pieces and the elastic member therebetween) contracts is formed in the middle part. Compared with scissors, the scissors near the side seal are smaller (height is lower). For this reason, the vicinity of the side seal is easily flattened by slightly extending the stretchable sheet. Therefore, the air permeability in the direction of penetrating the seat in the vicinity of the side seal will be better than the middle part where high ridges are densely packed.

Preferably, the width Δ in the expansion / contraction direction Df of at least one of the joints is set to be 0.2 mm or more and less than 1.0 mm.
Preferably, at least the width Δ in the expansion / contraction direction Df of the first joint 41 among the joints is set to be 0.2 mm or more and less than 1.0 mm.
Preferably, the width Δ in the expansion / contraction direction Df of at least the first and third joint portions 41 and 43 among the joint portions is set to be 0.2 mm or more and less than 1.0 mm.

In these cases, since the width Δ of each joint is small, the pitch of the ridges formed between adjacent joints can be reduced.

In particular, in the vicinity of the side seal where the interval between the joint portions is small, the small width Δ will make it possible to beautifully form small wrinkles.

Further, the elastic member moves at a predetermined speed with respect to a welding device such as a horn of an ultrasonic welding device. Therefore, when an individual portion is viewed, the elastic member is heated only for a predetermined time regardless of the width. However, when the width is large, the heated portion is continuously long. For this reason, heat is accumulated and the sheet and the elastic member may be excessively heated.

  Here, the width Δ in the expansion and contraction direction of each joint is 0.2 mm or more and less than 1.0 mm. The width Δ of the joint at least at a portion intersecting with the elastic member is 0.2 mm or more and less than 1.0 mm. In addition, between the elastic members, it means that the width Δ is 0.2 mm or more and less than 1.0 mm with respect to the majority (half or more) of the length in the length direction of the joint. The width Δ is set to be 0.2 mm or more and less than 1.0 mm for most length portions (80% or more) in the length direction.

That is, the width Δ of the joint may be 1.0 mm or more in part. For example, when two joints intersect each other, the width Δ of the joint at the intersecting part may be 1.0 mm or more.
On the other hand, the width Δ of the joint may be less than 0.2 mm in part.

  As shown in FIG. 1, the width Δ of the joint portion in the expansion / contraction direction Df is set to 0.2 mm or more and less than 1.0 mm. In the case of this example, the two sheets or the sheet and the elastic member F will be beautifully and uniformly joined at the joining portion.

  From the above viewpoint that the sheet and the elastic member may be excessively heated, the width Δ of the joint is preferably 0.95 mm or less, more preferably 0.9 mm or less, and most preferably 0.85 mm or less. .

On the other hand, generally, the joining force between the elastic member and both sheet pieces will be weaker than the joining force between the sheet pieces. Therefore, if the width Δ of the joint portion is too small, the joining force between the elastic member and both sheet pieces tends to be insufficient.
From this viewpoint, the width Δ of the joint is preferably 0.3 mm or more, more preferably 0.35 mm or more, and most preferably 0.4 mm or more.

The elastic member may be linear or cord-like. For example, the elastic member may be a multi-strand in which a plurality of thread rubbers (fibrous elastic bodies) are gathered in a bundle. Examples of the material of the thread rubber include polyurethane.

Due to the contraction force of the elastic member, the sheet pieces at each waistline portion form a large number of ridges P in a state where the elastic member contracts. The sheet piece may be, for example, a thermoplastic nonwoven fabric in which a large number of thermoplastic fibers are laminated.

The manufacturing method of the present wearing article includes a step of generating a pair of waistline continuums 40 in which a plurality of continuous elastic members F are sandwiched between two continuous sheets W4 and serve as the front and back waistline parts 3;
Transporting the pair of waistline continuums 40 in a transport direction L along the waistline direction X in parallel with each other;
A step of generating the continuous laminated body W1 by arranging the absorbent main body 2 so that the absorbent main body 2 is installed on the pair of waistline continuous bodies 40 during the conveyance;
A folding step of folding the continuous laminate W1 in two in the absorbent main body 2 such that the pair of waistline continuums 40 overlap each other;
Forming a pair of the side seals 5 and 5 one after the other by welding the pair of waistline continuums 40 to each other at the end portion E3 in the transport direction L of the front and rear waistline portions 3;
Cutting the pair of waistline continuums 40 one after another between the two rows of side seals 5, 5 to obtain individual wearing articles 1,
The step of generating each waistline continuum 40 includes:
The continuous sheets W4 are arranged so as to be intermittent in the transport direction L, cross the plurality of continuous elastic members F, and so that the first interval S1 is smaller than the second interval S2. Three or more stripe-shaped joint portions 41 to 43 are welded to each other.

When the waistline continuous body 40 is successively cut between the two rows of side seals 5 and 5, the continuous elastic member F is also cut. The cut continuous elastic member F snaps back to the first joint portion 41. When the joining force of the first joining portion 41 is not sufficiently large, the snapback chain is likely to occur.
On the other hand, since the first interval S1 is small, the chain of snapbacks can be suppressed.

The features described and / or illustrated in connection with each such embodiment or each of the following examples may be in the same or similar form in one or more other embodiments or other examples and / or It can be utilized in combination with or instead of the features of other embodiments or examples.

  The invention will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings, in which: However, the examples and drawings are for illustration and description only and should not be used to define the scope of the present invention. The scope of the present invention is defined only by the claims. In the accompanying drawings, the same part numbers in a plurality of drawings indicate the same or corresponding parts.

Hereinafter, the structure of the wearing article 1 concerning Example 1 of this invention is demonstrated according to drawing.
1 to 3D show Example 1. FIG.

  As shown in FIGS. 1 and 2, the wearing article 1 of Example 1 has a symmetrical shape and structure, and includes an absorbent main body 2 and front and rear waist portions 3. The absorbent main body 2 includes a torso that covers the wearer's front torso and extends in the waist direction X, a torso that covers the wearer's rear torso and extends in the torso direction X, and a crotch that covers the crotch between the torso A portion 22 is provided.

  The crotch portion 22 extends in a longitudinal direction Y orthogonal to the waistline direction X. The absorbent main body 2 constitutes part or all of the crotch portion 22.

  As shown in FIG. 1, in the state of a finished product, the crotch portion 22 is folded in two along a line parallel to the waistline direction X. Accordingly, the end portions E3 in the waistline direction X of the front and rear waistline portions 3 in FIG. 2 overlap each other as shown in FIG. This wearing article is a pants type, and the front waistline portion 3 and the back waistline portion 3 in the waistline direction X end portions are welded to each other.

  An absorbent core (not shown) is provided on the absorbent main body 2 in FIG. This absorbent core absorbs body fluids. The absorbent core is sandwiched between a top sheet and a back sheet. Each sheet and the absorbent core are laminated together.

  The top sheet is made of a liquid-permeable thin nonwoven fabric and covers the skin surface of the absorbent core. A cuff (not shown) may be provided on the top sheet.

The said back sheet covers the non-skin surface of an absorption core, and consists of a liquid-impermeable resin sheet. Each waist part 3 is affixed to each end in the longitudinal direction Y of the absorbent main body 2.

  Each of the waistline portions 3 protrudes from the absorbent main body 2 in the waistline direction X. In other words, the waistline portion 3 protrudes in the waistline direction X from the crotch portion 22 and extends in the waistline direction X from both edge portions (ends in the waistline direction) E2 of the absorbent main body 2.

Each waistline portion 3 is provided with an elastic member 32 for fitting the wearing article 1 to the wearer. As the elastic member 32, for example, a material including a plurality of thread rubbers, flat rubbers, or thermoplastic resins can be employed. Further, the elastic member 32 may be invalidated (no contraction force) in a portion overlapping the absorbent main body 2. Each elastic member 32 may extend in the waist direction X in parallel with each other.

  The absorbent main body 2 may be formed with leg portions (not shown) that are constricted along the legs of the wearer. Another elastic member made of, for example, rubber thread may be provided along the leg circumference and the leg circumference of the waistline 3 so as to follow the wearer's leg circumference.

The absorbent main body 2 is attached to the skin surface of the waistline portion 3.
In this specification, the “skin surface” refers to a surface that faces the wearer's skin when the wearing article 1 is worn, and the “non-skin surface” refers to a surface opposite to the skin surface.

  Next, further details of the worn article 1 will be described.

In FIG. 2, each of the front and rear waistline portions 3 is formed by sandwiching a plurality of elastic members 32 extending in the waistline direction X between two nonwoven fabric sheet pieces 31. In a large number of first to third and fifth joint portions 41 to 43, 45 expressed in gray, the two sheet pieces 31 are welded to each other. 3A and 3C, the multiple joints 41 to 43, 45 overlap the elastic member 32, and are joined to each other at the joints 41 to 43, 45 as shown in FIGS. 3B and 3D. The two sheet pieces 31 at each waistline portion are formed with ridges (gather) P by the contraction force of the elastic member 32. That is, a plurality of ridges P appear between the plurality of joints 41, 42, 43, 45 in a state where the elastic member 32 is contracted. 3B and 3D, the illustration of the elastic member sandwiched between the two sheet pieces is omitted.

As shown in FIG. 2, the large number of joints 41 to 43 and 45 are parallel to each other in the longitudinal direction Y (crossing direction Dp) perpendicular to the waistline direction X (stretching direction Df of the elastic member 32). They are arranged in stripes (separated from each other in the waist direction). That is, the large number of joints 41 to 43, 45 are intermittently arranged in the waistline direction X and continuously (continuously) in the longitudinal direction Y orthogonal to the plurality of elastic members 32. Has been placed.

As shown in FIG. 1, the front and rear waistline portions 3 are welded to each other in a large number of side seals 5 written in gray. The multiple side seals 5 are intermittently arranged in the longitudinal direction Y at the end portion E3 of the front and rear waistline portions 3 in the waistline direction X.
In the case of this example, the first to third and fifth joint portions 41 to 43, 45 extending in the longitudinal direction Y and the rows of the side seals 5 are arranged in parallel to and spaced apart from each other in the waistline direction X. .

When each wearing article is cut into units of individual wearing articles, the elastic member 32 is also cut, and so-called snapback occurs at a portion where the side seal 5 and the elastic member 32 do not overlap, and the elastic member 32 contracts. To do.
Further, as shown in FIG. 3C, the side seals 5 are densely and intermittently arranged in the longitudinal direction Y (crossing direction Dp), and the elastic members 32 partially overlap the arrangement. Therefore, the elastic member 32 may be melted by the side seal 5, and in such a case, the end portion of the elastic member 32 contracts due to snapback.

In FIG. 1, a first interval S <b> 1 is set between the first joint portion 41 and the side seal 5. A second interval S2 is set between the second joint portions 42.

The first interval S1 in FIG. 1 is the first in the expansion / contraction direction Df between the first seal 41 and the side seal 5 that is closest to the side seal 5 among the multiple bonds 41, 42, 43, and 45. The interval S1. The second interval S2 is the expansion / contraction of the second joint portions 42 adjacent to each other at an intermediate portion between the end portions E3, E3 of the waistline portion 3 among the plurality of joint portions 41, 42, 43, 45. This is the second interval S2 in the direction Df.
The intermediate portion means a central region in the waistline direction X of the waistline portion excluding the end E3 and the vicinity thereof. For example, in FIG. 1, a plurality of the second joint portions 42 are provided in the region of the waistline portion corresponding to the width in the waistline direction X of the absorbent main body 2.

The first interval S1 is smaller than the second interval S2. The second interval S2 may be set to about 4 to 6 mm, for example.

In FIG. 1, a third interval S <b> 3 is set between the third joint 43 adjacent to the first joint 41 among the plurality of joints 41 to 43 and the expansion / contraction direction Df of the first joint 41. Has been. Also, between the fifth joint 45 adjacent to the third joint 43 and the third joint 45 in the expansion / contraction direction Df and between the fifth joints 45 in the vicinity of the third joint 43. A fourth interval S4 is set between the expansion and contraction directions Df.

The third interval S3 and the fourth interval S4 are smaller than the second interval S2. The third interval S3 and the fourth interval S4 may be set to about 2 to 3 mm, for example.

In FIG. 1, the width Δ in the expansion / contraction direction Df of each of the joint portions 41 to 43 and 45 may be set to about 0.5 to 0.7 mm, for example.

Next, a method for manufacturing the worn article 1 will be described.

  As shown in FIG. 4, a plurality of continuous elastic members F extending in the transport direction L are transported in the transport direction L in a state of being extended in the transport direction L.

  A nip roll (not shown) sandwiches the continuous elastic member F between two continuous sheets (for example, continuous nonwoven fabric) W4 having a pair of side edges 4E extending in the transport direction L, and the continuous sheets W4 overlap each other. The continuum 40 is produced by bonding.

That is, the plurality of continuous sheets W4 are arranged in a plurality of first to third and fifth joint portions 41 to 5 so as to cross the plurality of continuous elastic members F intermittently in the transport direction L of FIG. 43 and 45 are welded together. Here, as shown in FIG. 1, the welding is performed such that the first interval S1, the third interval S3, and the fourth interval S4 are smaller than the second interval S2. In addition, this welding joining may be heat sealing (thermal welding), or may be welding by ultrasonic energy.

The continuous body 40 may be invalidated by cutting a part of the continuous elastic member F or the like at a portion overlapping the absorbent main body 2. In addition, the absorptive main body 2 is affixed on the invalidated area | region by the next process.

As shown in FIG. 5, the continuous body 40 having the pair of side edges 4E is slit by a slitter (not shown) along the transport direction L while being transported in the transport direction L. Thereby, the said continuous body 40 becomes a pair of trunk periphery continuous body 40 used as the front and rear waistline part. After the slit, the two waistline continuums 40 are relatively moved in the longitudinal direction Y so as to be separated from each other in the longitudinal direction Y orthogonal to the transport direction L.

Thereafter, the absorbent main body 2 straddles the pair of waistline continuums 40 while the pair of waistline continuums 40 are transported in the transport direction L substantially parallel to each other, and part of the waistline continuums 40 The absorptive main body 2 is arranged (constructed) so as to overlap with each other, and a continuous laminated body W1 is generated.

Then, as shown in FIG. 6, the said continuous laminated body W1 is folded in two in the said absorptive main body 2 so that said pair of trunk periphery continuous bodies 40 may mutually overlap.

As shown in FIG. 6, the first joint portions 41 adjacent to each other among the plurality of joint portions at the end portion E <b> 3 (FIG. 1) in the transport direction L of the portion that becomes the front and rear waist portions 3. The pair of waistline continuums 40 are welded to each other in the side seal 5 therebetween. In addition, this welding joining may be welding by ultrasonic energy of an ultrasonic horn, or may be heat sealing.

Then, the said continuous laminated body W1 of FIG. 6 is cut out to the magnitude | size (unit) for each wearing article 1 along the virtual cutting line shown with a dashed-dotted line. That is, in order to produce | generate each wearing article 1 one after another, the continuous laminated body W1 is cut | disconnected in the longitudinal direction Y one after another between the absorptive main bodies 2 mutually adjacent to the said conveyance direction L. FIG. In this way, the pair of waistline continuums 40 are cut one after another at a position corresponding to the end E3 in the waistline direction X (FIG. 1) of the wearing article 1 and between the two rows of side seals 5 and 5. Thereby, the individual pants-type wearing articles 1 shown in FIG. 1 are obtained.

7A and 7B show Example 2. FIG. Hereinafter, the structure different from the first embodiment will be mainly described, and the description of the same structure as the first embodiment will be omitted.

In the case of this example, the pair of sheets 3 and 3 are also welded to each other at the fourth joint 44 shown in FIG. 7B. The fourth joint 44 overlaps the side seal 5.
That is, the fourth joint portion 44 welds the two sheet pieces 31 to each other, fixes the elastic member 32 to the two sheet pieces 31, and extends in the expansion / contraction direction Df of the elastic member 32. They are provided continuously in the intersecting direction Dp. In the seal region A5 of the end portion E3 where the side seal 5 is disposed, the fourth joint portion 44 is disposed so as to overlap a part of the side seal 5. In the case of this example, two rows of the fourth joint portions 44 are provided in the seal region 5A.

On the other hand, in the first embodiment, as shown in FIG. 2, in the seal region A5 of the end portion E3 where the side seal 5 is disposed, all of the plurality of joint portions are disposed without overlapping the side seal 5. ing.

In each of the above examples, the joint portions 41 to 45 extend in parallel to each other and in a direction orthogonal to the waistline direction X. However, the stripe-shaped joint portions may extend in a direction inclined with respect to the direction Y perpendicular to each other, and may further extend in two oblique directions in a direction in which the respective joint portions intersect each other.

As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily understand various changes and modifications within the obvious scope by looking at the present specification.
For example, the present wearing article may not have a cuff or the like. Moreover, the tension | tensile_strength of an elastic member may be nullified also about parts other than the site | part which wraps with the absorptive main body in a trunk periphery member.
Further, the waistline continuum 40 may not be generated by being slit into two.
Accordingly, such changes and modifications are to be construed as within the scope of the present invention as defined by the claims.

The present invention can be applied to a pants-type wearing article.

1: Wear article 2: Absorbent body 22: Crotch
3: waist part 31: sheet piece 32: elastic member 40: waist part continuous body 41: 1st junction part 42: 2nd junction part 43: 3rd junction part 44: 4th junction part 45: 5th junction part 5: side Seal E2: Edge E3: End A5: Sealing region Df: Stretching direction F: Continuous elastic member L: Conveying direction P: 襞 S1, S2, S3: Spacing X: waistline direction Y: orthogonal direction (vertical direction)
W1: Continuous laminate W4: Continuous sheet Δ: Width of joint

Claims (9)

A pants-type disposable wearing article,
The wearing article 1 includes a front waistline portion 3 and a rear waistline portion 3 adapted to cover a wearer's torso, and an absorbent main body 2 constructed on the front and back waistline portions 3.
Each of the front and rear waistline portions 3 is formed by sandwiching a plurality of elastic members 32 extending in the waistline direction X between two sheet pieces 31,
The two sheet pieces 31 are joined to each other in a welded structure, and three or more stripe-like joining portions 41, 42, 43 for fixing the elastic member 32 to the two sheet pieces 31 include the elastic member. Is provided continuously in a direction Dp that intersects 32 expansion and contraction directions Df,
In a state where the elastic member 32 is contracted, a plurality of ridges P appear between the three or more stripe-shaped joint portions 41, 42, 43,
The front and rear waistline portions 3 are overlapped with each other, and an end portion E3 of the front waistline portion 3 in the waistline direction X and an end portion E3 of the rear waistline portion 3 in the waistline direction X are welded to each other by side seals 5. Are joined,
Of the three or more stripe-like joint portions 41, 42, 43, the first interval S1 in the expansion / contraction direction Df between the first joint portion 41 closest to the side seal 5 and the side seal 5 is the 3 Of the two or more stripe-shaped joint portions 41, 42, 43, the second in the expansion / contraction direction Df of the plurality of second joint portions 42 that are adjacent to each other in the intermediate portion between the end portions E3, E3 of the waistline portion 3. Wearing articles that are smaller than the spacing S2. In claim 1,
A third distance S3 in the expansion / contraction direction Df between the first joint 41 and the third joint 43 adjacent to the first joint 41 among the three or more stripe-shaped joints 41 to 43 is the first distance S3. Wearing article smaller than 2 intervals S2. In claim 1 or 2,
A plurality of fourth joining portions 44 that join the two sheet pieces 31 to each other in a welded structure and fix the elastic member 32 to the two sheet pieces 31 intersect the expansion / contraction direction Df of the elastic member 32. Provided continuously in the direction Dp,
The wearing article, wherein the fourth joint portion 44 is disposed so as to overlap a part of the side seal 5 in the seal region A5 of the end portion E3 where the side seal 5 is disposed. In claim 2,
The wearing article in which all of the three or more stripe-shaped joint portions 41 to 43 are disposed without overlapping the side seal 5 in the seal region A5 of the end E3 where the side seal 5 is disposed. In claim 4,
A plurality of fifth joining portions 45 that join the two sheet pieces 31 to each other in a welded structure and fix the elastic member 32 to the two sheet pieces 31 intersect the expansion / contraction direction Df of the elastic member 32. Provided continuously in the direction Dp,
The plurality of fifth joint portions 45 are disposed on the opposite side of the first joint portion 41 with respect to the third joint portion 43 with respect to the expansion / contraction direction Df,
A fourth interval S4 in the expansion / contraction direction Df between the fifth joint 45 adjacent to the third joint 43 and the third joint among the plurality of fifth joints 45, and the third joint 43 A worn article in which at least one of the fourth intervals S4 in the expansion / contraction direction Df of the plurality of fifth joint portions 45 in the vicinity of the second interval is smaller than the second interval S2. In any one of Claims 1-5,
The wearing article in which the width Δ in the expansion / contraction direction Df of at least one of the joints is set to be 0.2 mm or more and less than 1.0 mm. In any one of Claims 1-5,
The wearing article in which the width Δ in the expansion / contraction direction Df of at least the first joint portion 41 among the joint portions is set to be 0.2 mm or more and less than 1.0 mm. In any one of Claims 2-5,
The wearing article in which the width Δ in the expansion / contraction direction Df of at least the first and third joint portions 41 and 43 among the joint portions is set to 0.2 mm or more and less than 1.0 mm. It is a manufacturing method of the wearing article of Claim 1,
A plurality of continuous elastic members F are sandwiched between two continuous sheets W4 to generate a pair of waistline continuums 40 that form the front and back waistline parts 3, and
Transporting the pair of waistline continuums 40 in a transport direction L along the waistline direction X in parallel with each other;
A step of generating the continuous laminated body W1 by arranging the absorbent main body 2 so that the absorbent main body 2 is installed on the pair of waistline continuous bodies 40 during the conveyance;
A folding step of folding the continuous laminate W1 in two in the absorbent main body 2 such that the pair of waistline continuums 40 overlap each other;
Forming a pair of the side seals 5 and 5 one after the other by welding the pair of waistline continuums 40 to each other at the end portion E3 in the transport direction L of the front and rear waistline portions 3;
Cutting the pair of waistline continuums 40 one after another between the two rows of side seals 5, 5 to obtain individual wearing articles 1,
The step of generating each waistline continuum 40 includes:
The continuous sheets W4 are arranged so as to be intermittent in the transport direction L, cross the plurality of continuous elastic members F, and so that the first interval S1 is smaller than the second interval S2. The manufacturing method including the process of carrying out the welding joining mutually by the 3 or more stripe-shaped junction parts 41-43.