WO2016031850A1

WO2016031850A1 - Disposable wearable article and method for manufacturing same

Info

Publication number: WO2016031850A1
Application number: PCT/JP2015/073985
Authority: WO
Inventors: 梅林　豊志
Original assignee: 株式会社瑞光
Priority date: 2014-08-29
Filing date: 2015-08-26
Publication date: 2016-03-03
Also published as: CN106572933A

Abstract

A disposable wearable article, in which at least one waist band that comprises a pair of webs and multiple elastic strands sandwiched between the webs and capable of stretching in the direction of the waistline of a wearer is arranged in a back waistline part, tabs to be fastened to a front waistline part are respectively arranged at both ends of the back waistline part in such a state that the tabs protrude in the direction of the waistline, each of the tabs is provided with a base and a fastening element arranged at the protruding end of the base, and the non-protruding end of each of the tabs is bonded to the waist band. In the disposable wearable article, the non-protruding end of each of the tabs is bonded to a non-stretchy first end of the waist band in such a manner that the non-protruding end can be laminated onto the non-stretchy first end, wherein the non-stretchy first end cannot be affected by the stretching force caused by the elastic strands.

Description

Disposable wearing article and manufacturing method thereof

The present invention relates to a disposable wearing article having a waistband and a tab at the back waistline portion and a method for manufacturing the disposable wearing article.

◎ The waistband expands and contracts so that disposable wearable items such as diapers fit the wearer's torso. The tab is easily pinched when the rear waistline is fastened to the front waistline. By pulling the tab, the waistband extends, and the wearing work becomes easy.

JP2006-198207A (front page) JP2007-020658A (front page)

In the waistband of the prior art or the like, an elastic strand such as rubber thread is sandwiched between two web (nonwoven fabric) layers, and the overlapping portion (the central portion in the width direction) with the absorbent body or both ends of the rear waistline portion The rubber thread is cut to reduce stretchability.

The rubber thread is cut at both ends, but overlaps the fastener base. For this reason, when the fastener member is arranged at the time of manufacture, wrinkles are likely to occur in the fastener mounting portion, and the appearance is poor.

Therefore, an object of the present invention is to provide a disposable wearing article that is less likely to cause wrinkles in a mounting portion of a fastening member such as a fastener and has a good appearance, and a method for manufacturing the same.

This article is made up of at least a laminated web sandwiching elastic strands between two webbed layers with multiple elastic strands that stretch in the direction of the wearer's waist. Waistband to be placed on the back waistline,
A tab that is fixed to the front waistline portion is disposed at each of both ends of the waistline direction of the rear waistline portion in a state of protruding in the waistline direction,
The tab comprises a base and a fastening element provided at the protruding end of the base;
In the disposable wearing article in which the non-projecting end of the tab is joined to the waistband,
The non-projecting end portion of the tab is joined in a state of being laminated on a non-stretchable first end portion on which the elastic force of the waistband does not act.

In the present article, the non-projecting end of the tab is joined in a state of being laminated on the non-stretchable first end of the waistband. Therefore, wrinkles are unlikely to occur at the non-projecting end portion (attachment portion) of the tab that is the fastening member. Therefore, the appearance of the worn article is improved.

Moreover, the non-stretchable first end of the waistband is a flat plane that is less prone to wrinkles. Therefore, the adhesiveness of the non-projecting end portion of the tab is improved, and the attachment (adhesion) strength of the tab on which a large tensile force acts during the wearing operation is improved.

1A and 1B are a partially broken plan view and a cross-sectional view, respectively, showing a worn article according to an embodiment of the present invention. FIG. 2 is a plan view showing a waistband and a tab of the wearing article. FIG. 3: is a typical schematic perspective view which shows the manufacturing method of the wearing article. FIG. 4 is a plan view showing the manufacturing method. FIG. 5 is a plan view showing the manufacturing method. 6A and 6B are schematic side views showing examples of the manufacturing apparatus. 7A and 7B are a plan view and a cross-sectional view of the waistband, showing another method for manufacturing the waistband, respectively. 8A and 8B are a plan view and a cross-sectional view of the waistband, respectively, illustrating another method for manufacturing the waistband. 9A and 9B are a plan view and a cross-sectional view of the waistband, respectively, showing another method for manufacturing the waistband.

In a preferred article, the at least one waistband includes a pair of waistbands spaced apart from each other in the waistline direction of the rear waistline and disposed at both ends of the rear waistline.

In this case, a waist band is not disposed in the central portion between both end portions of the rear waistline portion. Therefore, it is possible to reduce the webs and elastic strands that are the material of the waistband.
In addition, the waistband is short, so that it is easy to handle the waistband when the waistband is attached to the rear waistline portion. Therefore, wrinkles are unlikely to occur in the waistband.

In a more preferred article, each waistband of the pair of waistbands has a non-stretchable second end portion to which the stretch force due to the elastic strand does not act at an end portion opposite to the first end portion. ing.

The first and second end portions of the waistband are non-stretchable, and can be easily manufactured by cutting the continuous laminate at the non-stretchable portion.

This wearing article can be obtained by the following manufacturing method, for example.
That is, in the method for manufacturing a worn article, the continuous elastic member serving as the plurality of elastic strands is continuous in the transport direction, and is stretched between two web-like layers that are continuous in the transport direction. Obtaining a sandwiched continuous laminate; and
Cutting the tip of the continuous laminate one after another along a virtual cutting line extending in the width direction intersecting the transport direction of the continuous laminate to obtain the at least one waistband;
Removing the contraction force of the elastic strand at at least one end of the elastic strand in the waistband to form the non-stretchable first end on the waistband;
Rotating the posture of the waistband by 90 ° in a plane in which the waistband expands so that the elastic strand stretches along the waistline direction;
Arranging the at least one waistband on the rear waistline after the rotation;
And overlapping the non-projecting end of the base of the tab with the non-stretchable first end of the waistband.

In a preferred manufacturing method, in the step of arranging the at least one waistband in the rear waistline portion,
The waistbands are respectively disposed at both ends of the rear waistline portion in a state where the pads holding the pair of waistbands are separated from each other in the waistline direction of the rear waistline portion.

In this case, the pad is shortened in the waistline direction, and has higher rigidity than the pad that is long in the waistline direction. Therefore, the pad is not easily distorted. Therefore, wrinkles are unlikely to occur at the non-stretchable first end portion of the waistband held by the pad.

Features described and / or illustrated in connection with one 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, an example of the structure of the wearing article 1 according to the embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1A and FIG. 1B, the wearing article 1 of this example includes an absorbent main body 2 and a diaper main body 3. The absorbent main body 2 has a front part 20, a back part 21 and a crotch part 22. The front part 20 covers the wearer's front trunk (front part of the trunk) and extends in the trunk circumference direction X. The back portion 21 covers the wearer's rear trunk (the rear part of the trunk) and extends in the trunk circumference direction X. The crotch part 22 covers the crotch of the wearer between the front part 20 and the back part 21.

The crotch portion 22 continues to the front portion 20 and the back portion 21. The absorbent main body 2 is long in the longitudinal direction (longitudinal direction) Y perpendicular to the waistline direction X.

1A, the wearable article is worn in a state where the crotch portion 22 is folded in two along a virtual line parallel to the waistline direction X. Thereby, the front waistline part 3F of the diaper main-body part 3 and the edge parts of the waistline direction X of the said back waistline part 3B are mutually connected.

As shown in FIG. 1B, the absorbent main body 2 is provided with an absorbent core (core) 24. The absorption core 24 absorbs body fluid. The absorbent core 24 is sandwiched between a top sheet 26 and a back sheet 27. The

sheets

26 and 27 and the absorbent core 24 are stacked on each other.

In FIG. 1B, the top sheet 26 is made of a liquid-permeable thin nonwoven fabric and covers the skin surface of the absorbent core 24. A cuff 25 may be provided on the top sheet 26.
In the present invention, the “skin surface” means an inner surface that directly or indirectly contacts the wearer's skin when the diaper is worn, and directly or indirectly faces the wearer's skin.

The back sheet 27 covers the non-skin surface of the absorbent core 24 and is made of a liquid-impermeable resin sheet. A non-skin surface of the back sheet 27 is laminated with an outer nonwoven fabric 30 having air permeability.
In the present invention, the “non-skin surface” means an outer surface that does not contact the wearer's skin when the diaper on the side opposite to the skin surface is worn, and does not face the wearer's skin. In FIG. 1A, the absorbent main body 2 is disposed between the front waistline portion 3F and the rear waistline portion 3B.

The front and

rear waistline portions

3F and 3B constitute a pair of front flaps 31 and rear flaps 32 that protrude from the absorbent main body 2 in the waistline direction X, respectively. Each said

flap

31 and 32 comprises a part of front and rear trunk part. That is, as shown in FIG. 1A, each of the

flaps

31 and 32 protrudes in the waistline direction X from the crotch part 22 and extends in the waistline direction X from the absorbent main body 2 (crotch part 22).

For example, a pair of waistbands 5 is provided in the rear waistline portion 3 </ b> B of the diaper main body 3. Each waist band 5 is formed by sandwiching a plurality of elastic strands F extending and contracting in the waist direction X of the wearer between a pair of

webs

53, 53. The pair of waistbands 5 are spaced apart from each other in the waistline direction X of the rear waistline portion 3B, and are disposed at both end portions 3E of the rear waistline portion 3B, and partially overlap the rear flap 32 and the absorbent main body 2. ing.

As shown in an enlarged view in FIG. 2, the waistband 5 includes a non-stretchable first end portion 51 to which a stretching force due to the elastic strand F does not act. Further, the waistband 5 includes a non-stretchable second end portion 52 that does not act on the stretching force of the elastic strand F at the end portion opposite to the first end portion 51. The first end portion 51 in FIG. 1A is disposed at a position close to both ends of the rear waistline portion 3B.

The non-stretchable first end portion 51 is arranged with a tab 4 fixed to the front waistline portion 3F in a state of protruding in the waistline direction X. The non-projecting end portion 42 of the tab 4 is joined to the first end portion 51 of the waistband 5 in a stacked state.

The tab 4 includes a base 40 and a fastening element provided at the protruding end 41 of the base 40. For example, a male fastener 4F can be used as the fastening element. On the other hand, a female surface fastener may be fixed to the non-skin surface of the front waistline portion 3F. In addition, when the non-skin surface of the front waistline part 3F is a nonwoven fabric, it is not necessary to provide a female surface fastener.

As the fastening element, a tape material coated with a fastening agent may be fixed to the tab 4. In this case, it is necessary to form on the non-skin surface of the front waistline portion 3F a surface on which the fastening agent easily adheres.

When performing the wearing operation, the pair of tabs 4 are pulled in the waistline direction X, and the male surface fasteners 4F of the tabs 4 are engaged with the female surface fasteners and the nonwoven fabric on the outer surface of the front waistline portion 3F. The wearer wears the article 1.

As the structure of the non-stretchable first and

second end portions

51 and 52, for example, as shown in FIG. It is possible to employ a structure in which the stretched elastic strand F does not exist and the stretched elastic strand F exists in the intermediate portion 55 between both

end portions

51 and 52. The waistband 5 having such a structure can be obtained by a known snapback.

That is, as shown in a broken view in FIG. 2, the pair of

webs

53, 53 constituting a part of the waistband 5 are laminated to each other with the elastic strands F sandwiched between the adhesives 54 indicated by a large number of dots. ing. The adhesive 54 is applied almost entirely (mostly) in the intermediate portion 55 between the both

end portions

51 and 52. The adhesive 54 is not applied to the non-coating portion 56 obtained by extending the elastic strand F in the waist direction X at the both

end portions

51 and 52, and only the non-coating portion 56 and the non-coating portion 56 are bonded. Agent 54 is applied.

Part of the elastic strand F in a state of being snapped back and contracted is sandwiched between the pair of

webs

53 and 53 in the non-coating portion 56. In addition, a part of the base 40 of the tab 4 may be laminated on a part of the waistband 5 in a state where the non-projecting end part 42 of the tab 4 overlaps the contracted elastic strand.

Another elastic strand for waist or hip may be provided directly on the diaper body 3 at the front and

rear waist portions

3F and 3B in FIG. 1A.
The elastic strands are for fitting the

waist portions

3F and 3B to the wearer. As these elastic strands, for example, a thread-like or belt-like material containing a plurality of thread rubbers, flat rubbers, thermoplastic resins (hot melt), or urethane foam can be employed.

The absorbent main body 2 may be formed with a leg portion that is constricted along the leg of the wearer. Another elastic strand made of, for example, rubber thread may be provided along the leg circumference and the leg circumference of the

waist circumference sections

3F and 3B so as to follow the wearer's leg circumference. .

Each member constituting the wearing article 1 is bonded or welded to each other, and such bonded or welded portions are indicated by a large number of small dots in FIGS. 1B to 3. The surface of the male fastener 4F is shown with a larger dot than the welded portion.

Next, a method for manufacturing the worn article 1 will be described with reference to FIGS.

As shown in FIG. 3, a continuous laminated body W2 in which the continuous elastic members F1 to be the plurality of elastic strands F are continuous in the transport direction D1 and are stretched and sandwiched between a pair of continuous webs W1. Is obtained. Prior to this step, the adhesive 54 is applied in advance to the positions to be the both

end portions

51 and 52 and the intermediate portion 55 of the waistband 5 as described above.

Subsequently, the continuous laminate W2 is divided into two parts by being cut along a center line extending in the transport direction D1. After this division, the pair of divided continuous laminates W2 are conveyed so as to be separated from each other. Thereafter, the end portions of the continuous laminated body W2 are cut one after another along a virtual cutting line L extending in the width direction D2 intersecting the transport direction D1 of the continuous laminated body W2, and the pair of

waist bands

5, 5 One after another.

The elastic strand F is cut together with the web W between the portions that become the first or

second end portions

51 and 52 of the waistband 5 adjacent to each other at the time of the cutting, so that both the elastic strands F in the waistband 5 are cut. The contraction force of the elastic strand F is removed at the end portion FE, and the non-stretchable first and

second end portions

51 and 52 are formed on the waistband 5.

The cutting is performed by the cutter 61 shown in FIG. 6A cutting the continuous laminated body W2 on the pad 62 (FIG. 5) of the drum 6. The continuous laminated body W2 (FIG. 3) is intermittently supplied onto the pad 62 (FIG. 5) of the drum 6 by the supply mechanism 60.

After the cutting, the pair of pads 62 in FIG. 5 turn 90 °, and the posture of the waist band 5 in the plane in which the waist band 5 expands so that the elastic strand F extends in the waist direction X. Is rotated 90 °.

After the turning, the waist bands 5 are respectively disposed at portions corresponding to both end portions 3E of the rear waistline portion 3B in a state where the pads 62 adsorbing the pair of waistbands 5 are separated from each other in the waistline direction X of the rear waistline portion 3B. 5 is arranged. After this arrangement, the non-projecting end portion 42 of the tab 4 is overlapped and joined to the non-stretchable first end portion 51 of the waistband 5.

In FIG. 4, the diaper main body 3 including the back sheet 27 and the absorbent core 24 is continuous in the flow direction Y1. While the diaper main body 3 is conveyed in the flow direction Y <b> 1, the waist band 5 is joined to the diaper main body 3, and the tab 4 is further joined to the waist band 5.

After the joining, a liquid-permeable continuous web W3 to be the top sheet 26 is laminated on the diaper main body 31 so as to cover the absorbent core 24 and the back sheet 27.

Thereafter, a pair of continuous webs for cuff W4 to be the cuff 25 is laminated to produce a continuous laminated body W5 to be a diaper. After this lamination, a part of the diaper main body 3 may be cut out to form a leg hole.

Thereafter, in order to obtain individual wearing articles 1 from the continuous laminate W5, the end portions of the continuous laminate W5 are successively cut along virtual lines extending in the width direction X1 orthogonal to the flow direction Y1. The continuous laminate W5 is cut between the

adjacent absorption cores

24, 24. In this way, the wearing article 1 of FIG. 1A is obtained.

By the way, in the said Example, the contraction force of the elastic strand F was nullified in both the 1st and

2nd end parts

51 and 52 of the waistband 5 of FIG. However, the invalidation may be performed only on the first end portion 51.

Further, as the invalidating method, for example, the elastic strand F may be thermally cured to remove the contraction force, or the elastic strand F may be cut short to remove a part of the contraction force.

Further, the

webs

53 and 53 may be partially welded to each other at the first or

second end portions

51 and 52 in FIG. 2 so that the elastic strand F shrinks (snapback) after cutting.

By the way, in the said Example, the pair of web 53 of the waistband 5 was comprised by the separate web. However, the pair of webs 53 may be two web-like layers in which one web is double-folded.

For example, as shown in FIGS. 7A and 7B, the waistband 5 may be formed of at least one laminated web in which a plurality of elastic strands F are sandwiched between two web-like layers 53L. The two web-like layers 53L in FIG. 7B are formed by folding one wide web 53W in FIG. 7A in a double manner.

In this case, the continuous laminated body W2 includes two web-like layers in which the continuous elastic member F1 to be the plurality of elastic strands F is continuous in the transport direction D1 and is extended in the transport direction D1. It is generated by being sandwiched between 53L. That is, while the wide web 53W of FIG. 7A is folded along a virtual fold line LF extending in the transport direction D1, the continuous elastic member F1 is sandwiched between the doubly folded web-like layers 53L, The continuous laminate W2 is generated.

Further, as shown in FIGS. 8A and 8B, the continuous laminated body W2 may be generated by cutting the double wide folded web 53W along the center line. In this case, as shown in FIG. 8B, one of the pair of continuous laminated bodies W2 is formed of two web-

like layers

53L and 53L with one web, and the other is formed with two

webs

53 and 53. Two web-

like layers

53L and 53L may be formed.

9A and 9B, the wide web 53W may be generated by cutting the wide web 53W that is double-folded along the two folding lines LF along the center line.

The present invention can be applied to a diaper-type and pants-type disposable wearing article and a manufacturing method thereof.

1: Wearing article 2: Absorbent body 20: Front part 21: Back part 22: Crotch part 24: Absorbent core 25: Cuff 26: Top sheet 27: Back sheet 3: Diaper body part 30: Exterior nonwoven fabric 31: Front flap 32: Rear flap 3B: Rear waistline part 3F: Front waistline part 3E: Both ends part 4: Tab 40: Base 41: Projection end part 42: Non-projection end part 4F: Male surface fastener (fixing element)
5: Waistband 51: First end 52: Second end 53: Web 53L: Web-like layer 53W: Wide web 54: Adhesive 55: Intermediate part 6: Drum 60: Supply mechanism 61: Cutter 62: Pad D1: conveying direction D2: width direction F: elastic strand F1: continuous elastic member FE: end L: cutting line LF: folding line X: waistline direction X1: width direction Y1: flow direction W1: continuous web W2: continuous laminate W3, W4: Continuous web

Claims

A waistband formed of at least one laminated web in which a plurality of elastic strands extending and contracting in the waistline direction of the wearer is sandwiched between two web-like layers is disposed in the rear waistline portion,
A tab that is fixed to the front waistline portion is disposed at each of both ends of the waistline direction of the rear waistline portion in a state of protruding in the waistline direction,
The tab comprises a base and a fastening element provided at the protruding end of the base;
In the disposable wearing article in which the non-projecting end of the tab is joined to the waistband,
The disposable wearing article, wherein the non-projecting end portion of the tab is joined in a state of being laminated on a non-stretchable first end portion on which the elastic force of the elastic band of the waistband does not act.
The wearing article of claim 1,
The at least one waistband includes a pair of waistbands spaced apart from each other in the waistline direction of the rear waistline part and disposed at both ends of the rear waistline part. .
The wearing article of claim 2,
Each of the waistbands of the pair of waistbands is provided with a non-stretchable second end portion on which an elastic force due to the elastic strand does not act at an end portion opposite to the first end portion. Disposable wearing article.
The manufacturing method for manufacturing the disposable wearing article according to any one of claims 1 to 3, wherein the continuous elastic members to be the plurality of elastic strands are continuous in the transport direction and are stretched. Obtaining a continuous laminate sandwiched between two web-like layers continuous in the transport direction;
Cutting the tip of the continuous laminate one after another along a virtual cutting line extending in the width direction intersecting the transport direction of the continuous laminate to obtain the at least one waistband;
Removing the contraction force of the elastic strand at at least one end of the elastic strand in the waistband to form the non-stretchable first end on the waistband;
Rotating the posture of the waistband by 90 ° in a plane in which the waistband expands so that the elastic strand stretches along the waistline direction;
Arranging the at least one waistband on the rear waistline after the rotation;
And a step of overlapping and joining the non-projecting end of the base of the tab to the non-stretchable first end of the waistband.
In the manufacturing method of Claim 4,
In the step of arranging the at least one waistband in the rear waistline portion,
A method of manufacturing a worn article, wherein the waistbands are disposed at both ends of the rear waistline portion in a state where pads holding a pair of waistbands are separated from each other in the waistline direction of the rear waistline portion. .