JP6212484B2 - Method for producing disposable wearing article - Google Patents

Description

The present invention relates to a method of manufacturing a disposable worn article.

  In recent years, disposable wearing articles in which an indication sheet depicting a pattern or the like is arranged between the waistline nonwoven fabric so that the pattern appears on the outer appearance of a diaper or the like through the nonwoven fabric and a method for manufacturing the same have been proposed.

JP2003-339769 A

However, if the indication sheet is provided separately, the material cost increases. In addition, when the sheet is disposed in the waistline region, it becomes a factor that causes diapers and the like to become rough.
Accordingly, an object of the present invention is the indication without separately providing a sheet is to provide a method for producing stiffness hardly occurs disposable wearing article waist with achieving down material costs.

The disposable wearing article to which the method of the present invention is applied ,
The at least one waistline member 3F, 3B that covers the wearer's waist and extends in the waistline direction X, and overlaps the skin surface of the waistline members 3F, 3B with an overlapping portion 23, and extends in the longitudinal direction Y orthogonal to the waistline direction X. An absorbent main body 2 that covers the crotch of the wearer,
The waistline members 3F and 3B have a non-skin surface formed of a waistline nonwoven fabric, and at least one of the waistline members 3F and 3B is located in the waistline direction X rather than an end of the absorbent main body 2 in the waistline direction X. Protruding,
The absorbent main body 2 is formed by laminating an absorbent core 24 that absorbs the body fluid of the wearer and a liquid-impermeable resin sheet 27 that covers the non-skin surface of the absorbent core 24.
The absorbent main body 2 is laminated with an exterior nonwoven fabric 4 that covers the non-skin surface of the resin sheet 27, and
The outer nonwoven 4 has a short length in the vertical direction Y perpendicular to the waistline direction X than the resin sheet 27, said Oite the resin sheet 27 in a part of the overlapped portion 23 exterior nonwoven fabric 4 does not cover A non-covering portion 40 is provided,
A pair of three-dimensional cuffs 25 are provided for preventing body fluid from leaking in contact with the wearer's crotch on the skin surface of the absorbent main body 2,
The three-dimensional cuff 25 does not cover the center of the resin sheet 27 in the waistline direction X, and each sheet forming the pair of three-dimensional cuffs 25 wraps the end of the absorbent main body 2 in the waistline direction X. It is.
The method of the present invention includes a step of conveying a pair of continuous sheets W25 and W25 that become the pair of three-dimensional cuffs 25 in parallel with each other;
A step of intermittently arranging the exterior nonwoven fabric 4 in the continuous direction of the continuous sheet W25 between the continuous sheets W25, W25 so as to crotch the continuous sheets W25, W25;
After the step of intermittent arrangement, the step of arranging the absorbent main body 2 between the continuous sheets W25, W25;
A step of forming the three-dimensional cuff 25 by folding back the end of the continuous sheet W25 in the waistline direction X after the absorbent main body 2 is arranged.

According to the present invention, the length of the exterior nonwoven fabric 4 in the longitudinal direction Y is shorter than the length of the resin sheet 27 in the longitudinal direction Y. Therefore, the material cost can be reduced, and the waistline can be prevented from becoming stiff. . Moreover, when it has a pattern in the non-skin surface side of the said resin sheet 27, the number of sheets in the said non-covering part 40 in which the said exterior nonwoven fabric 4 does not cover the said resin sheet 27 decreases. Therefore, it is easy to visually recognize the design as viewed from the outside when the worn article is worn.
Further, both ends of the absorbent main body 2 in the waistline direction X are wrapped by the pair of three-dimensional cuffs 25. Therefore, the both ends of the absorptive main body 2 will not touch a wearer's skin surface, and the wearing feeling of a wear article will improve.

FIG. 1 is a schematic exploded perspective view showing a disposable wearing article according to a first embodiment of the present invention. FIG. 2A is a front view showing the wearing article unfolded, FIG. 2B is a sectional view taken along the line IIB-IIB, and FIG. 2C is a sectional view taken along the line IIC-IIC. FIG. 3 is a schematic rear view of the worn article developed. FIG. 4 is a schematic plan view showing the method for manufacturing the exterior laminated body according to the first embodiment. FIG. 5 is a schematic plan view showing a method for producing the continuous laminate. FIG. 6 is a schematic plan view showing a method for manufacturing a worn article. FIG. 7 is a schematic rear view of the wearing article according to the second embodiment. FIG. 8A is a front view of the wearing article according to the third embodiment, FIG. 8B is a cross-sectional view taken along the line IIB-IIB, and FIG. 8C is a cross-sectional view taken along the line IIC-IIC. FIG. 9 is a schematic layout diagram showing an apparatus for manufacturing an exterior continuous laminate according to the first embodiment.

In the present wearing article, the pair of three-dimensional cuffs 25 are preferably joined to the pair of side edges 4E extending in the longitudinal direction Y of the exterior nonwoven fabric 4.
In this case, a pair of three-dimensional cuffs 25, 25 separated from each other are connected in the waistline direction X by the exterior nonwoven fabric 4.
More preferably, the resin sheet 27 covers the edge of the absorbent core 24 in the waistline direction X.
In this case, body fluid can be prevented from leaking from the edge of the absorbent core 24 covered with the resin sheet 27.

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 figures 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.

Example 1
Hereinafter, the structure of the wearing article 1 concerning one Example of this invention is demonstrated according to drawing.
1 to 6 show a first embodiment.

  As shown in FIGS. 1 and 2A, the wearing article 1 of the present embodiment includes an absorbent main body 2, a front waistline member 3F, and a rear waistline member 3B. The absorbent main body 2 includes a front portion (front waistline portion) 20 that covers the wearer's front waist and extends in the waistline direction X, a back portion (rear waistline portion) 21 that covers the wearer's back waist and extends in the waistline direction X, and The crotch portion 22 covers the wearer's crotch between the front portion 20 and the back portion 21.

  The crotch portion 22 is connected to the front portion 20 and the back portion 21 and extends in the longitudinal direction Y orthogonal to the waistline direction X. The absorbent main body 2 constitutes part or all of the crotch portion 22.

  In FIG. 2A, the crotch portion 22 is folded in two along a line parallel to the waistline direction X when worn. As a result, the ends of the front waistline member 3F and the rear waistline member 3B in the waistline direction X overlap each other.

As shown in FIG. 1, the absorbent main body 2 is provided with an absorbent core 24 indicated by a broken line, and the absorbent core 24 absorbs body fluid.
The absorbent core 24 is sandwiched between a top sheet 26 and a back sheet (resin sheet) 27, and the sheets 26 and 27 and the absorbent core 24 are laminated together.

  In FIG. 2C, the top sheet 26 is made of a liquid-permeable nonwoven fabric and covers the skin surface of the absorbent core 24. A pair of three-dimensional cuffs 25 are provided on the top sheet 26. The pair of three-dimensional cuffs 25 have an elastic member F1 (FIG. 1) for the cuffs 25 to be in close contact with the wearer's skin, whereby the cuff 25 is placed between the wearer's crotch on the skin surface of the absorbent main body 2. Prevents body fluid from leaking from the worn article.

  The back sheet 27 covers the non-skin surface of the absorbent core 24 and is made of a liquid-impermeable resin sheet. On the non-skin surface of the back sheet 27 made of this resin sheet, a pattern, figure and / or character as shown in FIG. 3 or FIG. 7 may be printed. Further, a sheet member on which a pattern, a figure, and / or a character is printed may be attached to the non-skin surface of the back sheet 27.

The exterior nonwoven fabric 4 shown in FIG. 1 is bonded and laminated on the non-skin surface of the back sheet 27. The exterior nonwoven fabric 4 covers a part of the back sheet 27, which will be described in detail later. In addition, in order to make the structure of the wearing article 1 easy to understand, in FIG. 1, FIG. 3, and FIG.
As shown in FIG. 2C, the three-dimensional cuff 25 is joined to the side edge 4E of the exterior nonwoven fabric 4 on the non-skin surface of the exterior nonwoven fabric 4, and the top at the side edge 26E on the skin surface of the top sheet 26. The sheet 26 may be joined.
Further, at least a part of the non-skin surface of the back sheet 27 and at least a part of the skin surface of the three-dimensional cuff 25 may be joined to each other.

  In FIG. 3, the absorptive main body 2 is constructed between a front waistline member 3F and a rear waistline member 3B. The front waistline member 3F is affixed to the end portion in the longitudinal direction Y of the front portion 20 of the absorbent main body 2, and the absorbent main body 2 overlaps the skin surface of the front waistline member 3F at the overlapping portion 23. . On the other hand, the rear waistline member 3B is attached to the end in the longitudinal direction Y of the back portion 21 of the absorbent main body 2, and the absorbent main body 2 overlaps the skin surface of the rear waistline member 3B in the overlapping portion 23. Yes.

  The front and rear waistline members 3F and 3B protrude from the absorbent main body 2 in the waistline direction X and constitute a part of the front and rear waistline parts. That is, as shown in FIG. 2A, the waistline members 3F and 3B protrude in the waistline direction X from the crotch part 22, and protrude from the both edges (ends in the waistline direction) E1 of the absorbent main body 2 (crotch part 22). It extends to.

  For example, the front and rear waistline members 3F and 3B are formed by laminating a pair of non-woven fabrics 30 and 31 shown in FIG. These nonwoven fabrics 30 and 31 have air permeability.

In FIG. 1, the front and rear waistline members 3 </ b> F and 3 </ b> B may be provided with elastic members 32 for fitting the wearing article 1 to the wearer, as indicated by the broken lines in FIG. 1. As the elastic member 32, for example, a material including a plurality of thread rubbers, flat rubbers, films, or thermoplastic resins can be employed. The elastic member 32 may be invalidated (no contraction force) at the center of the front and back (the center of the waist members 3F and 3B).
The front and rear waistline members 3F and 3B may be single layer stretchable nonwoven fabrics. In this case, the air permeability is increased as compared with the case where a pair of non-woven fabrics are laminated, and the visibility of symbols and the like is improved.

Moreover, you may form in the absorptive main body 2 the leg periphery part constricted along the wearer's leg part. The elastic member F2 of FIG. 3 made of, for example, rubber thread is provided along the leg circumference and the leg circumference of the waistline members 3F and 3B so as to follow the wearer's leg circumference. Also good.
As shown in FIG. 1, in the case of the present embodiment, each solid cuff 25 is a member different from the exterior nonwoven fabric 4, and both side portions 41 are folded in an S shape or Z shape, and in the longitudinal direction Y. An elastic member F1 that expands and contracts is disposed and formed.

  When the wearing article is a diaper, a pair of male fasteners (not shown) are fixed to both edges of the skin surface of the rear waistline member 3B, while a female surface fastener is fixed to the non-skin surface of the front waistline member 3F. May be.

In addition, it may replace with a male surface fastener and may use the tape agent to which the fixing agent was apply | coated. In this case, it is necessary to form on the front waistline member 3F or the like a surface on which the fastening agent is easy to adhere.
Moreover, when the wearing article is a pants-type, the ends of the front waistline member 3F and the rear waistline member 3B in the waistline direction X may be welded to each other.

The non-skin surfaces of the waist members 3F and 3B in FIG. 3 are formed of a nonwoven fabric.
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, the main part of the present invention will be described.
As shown in FIG. 1, the exterior nonwoven fabric 4 is shorter in the longitudinal direction Y perpendicular to the waistline direction X than the back sheet 27 (resin sheet), and the back in a part or all of the overlapping portion 23. A non-covering portion 40 where the sheet 27 is not covered with the exterior nonwoven fabric 4 is provided. That is, as shown in FIG. 2A, the non-covering portions 40, 40 are provided at both edges in the longitudinal direction Y of the backsheet 27, and the exterior nonwoven fabric 4 in the longitudinal direction Y has the non-covering portions 40, 40 is arranged between 40.
2A and 2C, the three-dimensional cuff 25 does not cover the center of the back sheet 27 in the waistline direction X, and each sheet forming the pair of three-dimensional cuffs 25 is the absorbent main body 2. The outer nonwoven fabric 4 is wrapped around the end portion in the waistline direction X.

Next, a method for manufacturing the worn article 1 will be described with reference to FIGS.
As shown in FIG. 4, a pair of continuous nonwoven fabrics (an example of a continuous sheet) W25 and W25 that form a pair of three-dimensional cuffs 25 are conveyed in the Y1 direction in parallel to each other. The exterior nonwoven fabric 4 is intermittently disposed along the continuous direction of the continuous sheet W25 between the continuous nonwoven fabrics W25 and W25 so as to crotch the continuous nonwoven fabrics W25 and W25.
By this intermittent arrangement, the non-covering portions 40 and 40 are formed between the exterior nonwoven fabrics 4 and 4 adjacent to each other.
The elastic member F1 is arranged along the longitudinal direction Y1 on both side portions 41 of each continuous nonwoven fabric W25, W25, and both side portions 41 of each continuous nonwoven fabric W25 are folded back so that the elastic member F1 becomes the continuous nonwoven fabric W25. To be joined.

Then, the absorptive main body 2 is arrange | positioned between the said continuous nonwoven fabrics W25 and W25.
For example, as shown in FIG. 4, first, a continuous resin sheet S27 forming the back sheet 27 is continuously disposed between the two continuous nonwoven fabrics W25 and W25.
The width defined by the edges in the width direction X perpendicular to the longitudinal direction Y1 of the pair of continuous nonwoven fabrics W25 that form the pair of three-dimensional cuffs 25 is larger than that of the continuous resin sheet S27 that forms the back sheet 27. The continuous nonwoven fabrics W25 and W25 have both side portions 41 and 41 projecting from the continuous resin sheet S27 to both sides in the width direction, and the elastic members F1 that expand and contract in the longitudinal direction Y1 are disposed on the both side portions 41 and 41. Is done.

Thereafter, the continuous resin sheet S27 to be the back sheet 27 is bonded onto the skin surface of the pair of continuous nonwoven fabrics W25, and the non-covering portion 40 is closed by the continuous resin sheet S27, and the first bonding process is executed. Is done. The outer nonwoven fabric 4 is sandwiched between the continuous nonwoven fabric W25 and the continuous resin sheet S27 at both edges in the width direction X of the outer nonwoven fabric 4.
In addition, as shown in FIG. 4, the elastic member F2 may be arrange | positioned between the continuous resin sheet S27 and the continuous nonwoven fabric W25 in the case of the said 1st bonding process.

  Subsequently, as shown in FIG. 5, the absorbent core 24 is intermittently disposed and laminated between the continuous resin sheet S27 bonded to the continuous nonwoven fabric W25 and the continuous nonwoven fabric W26 forming the top sheet. The continuous laminated body W2 used as the absorptive main body 2 is produced | generated.

After the production of the continuous laminate W2, the edges of the continuous nonwoven fabrics W25 and W25 that become the pair of three-dimensional cuffs 25 and 25 in the vicinity of the end portion in the waistline direction X of the continuous laminate W2 are further folded back to form an S shape or A pair of Z-shaped solid cuffs 25, 25 are formed. Thus, the three-dimensional cuff 25 (continuous nonwoven fabric W25) does not cover the center in the waistline direction X of the continuous resin sheet S27 to be the back sheet 27 in the continuous laminate W2, and the pair of three-dimensional cuffs. 25 (continuous nonwoven fabric W25) each sheet | seat wraps the edge part of the said trunk periphery direction X of the said absorptive main body 2. FIG.

Then, as shown in FIG. 6, in order to obtain the said absorptive main body 2 and a pair of solid cuffs 25 and 25 of each wearing article 1 from the said continuous laminated body W2, the said continuous laminated body W2 and the said continuous nonwoven fabric W25 are obtained. It is cut along a virtual cutting line C (FIG. 5) extending in the width direction orthogonal to the longitudinal direction.
That is, the said continuous laminated body W2 of FIG. 5 and the said continuous nonwoven fabric W25 are cut off to the magnitude | size (unit) for each wearing article along the cutting line C shown with a dashed-two dotted line, and the exterior nonwoven fabric 4 of FIG. A laminated absorbent body 2 is produced. The absorbent main body 2 has a pair of three-dimensional cuffs 25 and 25. The produced absorbent body 2 is turned 90 °.

  After the swiveling, the absorbent main body 2 is installed on a continuous nonwoven fabric laminate W3F, W3B, which becomes a pair of waistline members 3F, 3B. During the erection, a second bonding step is performed in which the waistline members 3F and 3B are stacked and bonded to the non-skin surface of the back sheet 27 so that the non-covered portion 40 is covered with the stacked bodies W3F and W3B. Is done.

In addition, when giving a pattern etc. to the said back seat | sheet 27, the continuous pattern 100 as shown in FIG. 7 may be sufficient.
Moreover, although the said Example demonstrated the case where it had both the front waistline member 3F and the back waistline member 3B as a waistline member of the absorptive main body 2 extended from the both edges E1 of the absorbent body 2 to the waistline direction X, for example, The worn article may be a T-type diaper in which a waistline member extending in the waistline direction X is joined only to the rear waistline part. In this case, the non-covering part 40 may be provided only in the part to which the waistline member is joined.

  In the present invention, as shown in FIG. 8C, the exterior nonwoven fabric 4 may be disposed on the non-skin surface of the three-dimensional cuff 25. That is, the three-dimensional cuff 25 may be disposed so as to be sandwiched between the back sheet 27 and the exterior nonwoven fabric 4. In this case, in FIG. 4, the exterior nonwoven fabric 4 is attached to the lower surface of the continuous nonwoven fabric W25, 25, and therefore the exterior nonwoven fabric 4 is not wrapped by the continuous nonwoven fabric W25, 25.

In the present invention, the width of the back sheet 27 is made wider than the width of the outer nonwoven fabric 4 and is folded back in the vicinity of the edge in the waist direction X of the absorbent core 24 so that the back sheet 27 is in the waist direction X of the absorbent core 24. You may make it cover at least one part of the edge part of the skin surface side. That is, for example, a part of the folded back sheet 27 may be sandwiched between the edge of the absorbent core 24 and the edge of the top sheet 26. In this case, the side leakage prevention effect becomes higher.

In this invention, the manufacturing method of the continuous laminated body for exterior | cover concerning the said Example 1 shown in FIG. 4 may be performed by the manufacturing apparatus shown in FIG. 9, for example.
For example, the manufacturing apparatus includes a conveyor 5, a cutter C, a first drum D1, a second drum D2, and a third drum D3.

In the manufacturing apparatus, the exterior nonwoven fabric 4 is supplied to the first drum D1. A pair of continuous nonwoven fabrics W25 and W25 on which the elastic member F1 (FIG. 4) is disposed are supplied to the second drum D2. The pair of elastic members F2, F2 and the continuous resin sheet S27 are supplied to the third drum D3.

The exterior nonwoven fabric 4 is supplied from the conveyor 5 to the first drum D1 in a continuous state. The supplied exterior nonwoven fabric 4 is cut | disconnected one after another by the said cutter C contact | abutted to the said 1st drum D1, and each said exterior nonwoven fabric 4 is produced | generated.

The first drum D1 has a plurality of suction pads (not shown). The respective suction pads are separated from each other in the circumferential direction of the first drum D1 while transporting the exterior nonwoven fabric 4 in a state where the cut exterior nonwoven fabric 4 is adsorbed, and thereby the individual exterior nonwoven fabrics 4 are mutually transported in the transport direction. Separate. This separation may be performed by a known cut and slip.

  After the separation, the individual exterior nonwoven fabrics 4 are conveyed from the first drum D1 to the second drum D2. When transported to the second drum D2, each of the exterior nonwoven fabrics 4 is intermittently disposed in the continuous direction of the continuous nonwoven fabric W25 so as to straddle the pair of continuous nonwoven fabrics W25 and W25 (FIG. 4).

  Thereafter, the continuous nonwoven fabric W25 in which the exterior nonwoven fabric 4 is intermittently disposed is conveyed from the second drum D2 to the third drum D3. During the conveyance, the continuous resin sheet S27 is bonded to the continuous nonwoven fabric W25, and the first bonding process is performed. In the case of this 1st bonding process, the said elastic member F2 is arrange | positioned between the said continuous resin sheet S27 and the said continuous nonwoven fabric W25.

  The present invention can be applied to disposable diapers and pants.

1: worn article,
2: Absorbent body, 20: Front part, 21: Back part, 22: Crotch part, 23: Overlapping part, 24: Absorbent core 24E: Side edge of absorbent core 25: Solid cuff, 26: Top sheet 26E: Side edge of top sheet, 27: Back sheet (resin sheet),
3F: Front waistline member, 3B: Rear waistline member,
4: exterior nonwoven fabric, 40: uncovered portion, 41: side portion, 4E: side edge of exterior nonwoven fabric,
5: Conveyor C: Cutter D1-D3: 1st drum-3rd drum F1, F2: Elastic member,
W2: continuous laminate, W25: continuous nonwoven fabric (sheet) for cuff,
X: waist direction, Y: vertical direction

Claims (3)

It is a manufacturing method of disposable wearing article 1,
The wearing article 1 covers at least one waistline member 3F, 3B extending in the waistline direction X, covering the wearer's waist, and overlaps the skin surface of the waistline members 3F, 3B with an overlapping portion 23, and is perpendicular to the waistline direction X. An absorbent main body 2 extending in the direction Y and covering the crotch of the wearer,
The waistline members 3F and 3B have a non-skin surface formed of a waistline nonwoven fabric, and at least one of the waistline members 3F and 3B is located in the waistline direction X rather than an end of the absorbent main body 2 in the waistline direction X. Protruding,
The absorbent main body 2 is formed by laminating an absorbent core 24 that absorbs the body fluid of the wearer and a liquid-impermeable resin sheet 27 that covers the non-skin surface of the absorbent core 24.
The absorbent main body 2 is laminated with an exterior nonwoven fabric 4 that covers the non-skin surface of the resin sheet 27, and
The outer nonwoven 4 has a short length of the longitudinal direction Y than the resin sheet 27, the non-covered section 40 not part of Oite the resin sheet 27 has the outer nonwoven fabric 4 over the overlapped portion 23 is provided And
A pair of three-dimensional cuffs 25 are provided for preventing body fluid from leaking in contact with the wearer's crotch on the skin surface of the absorbent main body 2,
The three-dimensional cuff 25 does not cover the center of the resin sheet 27 in the waistline direction X, and each sheet forming the pair of three-dimensional cuffs 25 wraps the end of the absorbent main body 2 in the waistline direction X. and Nde,
Conveying a pair of continuous sheets W25, W25 to be the pair of three-dimensional cuffs 25 in parallel with each other;
A step of intermittently arranging the exterior nonwoven fabric 4 in the continuous direction of the continuous sheet W25 between the continuous sheets W25, W25 so as to crotch the continuous sheets W25, W25;
After the step of intermittent arrangement, the step of arranging the absorbent main body 2 between the continuous sheets W25, W25;
A step of forming the solid cuff 25 by folding back the end of the continuous sheet W25 in the waistline direction X after the absorbent main body 2 is disposed. The method for manufacturing a disposable wearing article according to claim 1, wherein the pair of three-dimensional cuffs 25 are joined to a pair of side edges 4E extending in the longitudinal direction Y of the exterior nonwoven fabric 4. 3. The method for manufacturing a disposable wearing article according to claim 1, wherein the resin sheet 27 covers at least a part of an edge of the absorbent core 24 on the skin surface side in the waistline direction X. 4.

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