JPH08196567A - Three-dimensional pants-type diaper manufacturing method - Google Patents

Abstract

(57) [Abstract] [Purpose] A method of manufacturing a three-dimensional pants type disposable diaper for infants and incontinent persons. [Structure] A waist opening, leg openings, a front body and a back body, and at least a side flap portion of the diaper,
A continuous diaper having a continuous liquid-permeable topsheet, a continuous liquid-impermeable backsheet, and an absorber placed between the two sheets, which is a method of manufacturing a disposable diaper having elasticity in the width direction of the diaper body. The main body laminate is manufactured by the vertical flow method, cut into individual diaper main bodies between the absorbers, inverted by 90 degrees, widened in the diaper width direction, supplied to the continuous waistband exterior sheet, and manufactured by the horizontal flow method. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a three-dimensional pants type disposable diaper, and more particularly to a method for producing a three-dimensional pants type disposable diaper which is used as a diaper for infants or incontinent persons.

[0002]

2. Description of the Related Art A diaper that has elastic side panels and expands and contracts in the width direction of a diaper body is manufactured by a vertical flow method in which the longitudinal direction of the absorbent body is the flow direction.
No. 140163 is proposed. Further, there is a manufacturing method in which an absorbent body manufactured by a longitudinal flow method is inverted 90 degrees and manufactured by a lateral flow method in which the longitudinal direction of the absorbent body is perpendicular to the flow direction, which are disclosed in JP-A-3-176053 and JP-A-4-16.
It is proposed in Japanese Patent No. 1152.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the case of the conventional retractable diaper disclosed in Japanese Patent No. 3,
Since there is no elastic member over the entire circumference of the opening corresponding to the waist and the pair of openings corresponding to the thighs of both legs, the fitting of the opening is insufficient and leakage is prevented. There is a problem in that Also,
In the manufacturing method of this break-away type diaper, a step of attaching an elastic elastic member in a stretched state in the width direction of the band-shaped body or cutting the band-shaped body continuous in the longitudinal direction of the liquid-absorbent pad to develop a diaper as a product It is necessary to fold the front and back waist gathers so that they overlap each other from the laminated body in a state, and to join the intermediate members to each other. To perform these steps, complicated and advanced technology is required. . Moreover, since the folding direction of the laminated body matches the conveying direction, the production speed of the manufacturing apparatus is restricted, and this is aimed at achieving the purpose required for a disposable diaper, which is low cost due to mass production. It becomes an obstacle.

On the other hand, in the case of the conventional snap-on type diaper disclosed in JP-A-3-176053 and JP-A-4-161152, as in the case of the previous snap-on type diaper, the thighs of both legs are formed. Since the elastic member does not intervene over the entire circumference of each of the pair of openings corresponding to, there is a problem in that the fitting of these openings is insufficient and leakage is prevented. Further, in the manufacturing method of the removable diaper, since the elastic elastic member has elasticity in the conveying direction, it is difficult to appropriately adjust the tension when the elastic elastic member serving as the waist belt is conveyed, As a result of the limited production speed, mass production of disposable diapers cannot be achieved at a low price. In this way, the conformability and fit to the wearer and the production efficiency of the product are in a contradictory relationship. The higher the quality, the higher the production cost, and the usability must be sacrificed to produce at low cost. There was a problem. The present invention overcomes the above problems,
An object of the present invention is to provide a diaper that has a good fit property, does not leak excrement, has excellent moisture permeability, has a good feel on the skin, and is more economical.

[0005]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides an absorbent main body comprising a liquid permeable top sheet, a liquid impermeable back sheet, and an absorbent body disposed between these sheets. A sheet having at least the outermost layer sheet and side sheets arranged on both side portions of the outermost layer sheet excluding the central region in the longitudinal direction, and a front body, a back body, and a width formed in a region in which the side sheet is arranged. And an absorbent member having a side flap portion that expands and contracts in a direction, the absorbent main body is joined to a central region in the longitudinal direction of the outer member, and the side edge portions of the side flap portion of the outer member facing each other are formed. A method for manufacturing a three-dimensional pants type disposable diaper in which a waist opening and a pair of leg openings are joined to form a waist opening and a stretchable elastic member is arranged along the leg opening. The continuous web to be the material of the liquid-permeable top sheet, and the central region between the continuous web to be the material of the liquid-impermeable back sheet, the absorber is arranged at a predetermined interval in the length direction, Adhesive fixing to form a continuous absorbent body, a step of supplying a web having a width wider than the width of the diaper as a continuous web to be a material of the outermost layer sheet, and a material of the outermost layer sheet A leg opening stretchable elastic member capable of forming leg gathers on both sides of the continuous web in the moving direction except the central region in the moving direction where the continuous absorbent body is to be arranged in a later step 1
A step of supplying the above continuous elastic members by bending them at a predetermined interval along the leg openings of the diaper while being stretched and adhering them, and by covering the continuous elastic members with a pair of sides. When the continuous absorbent body is arranged in a later step, a continuous web having stretchable elasticity to be used as a sheet material is arranged so as to overlap with at least a part of both side edges of the continuous absorbent body, and is fixed by adhesion. And the continuous web to be the material of the outermost layer sheet that extends outside both side edges than the continuous web to be the material of the side sheet, is folded back to the continuous web upper surface to be the material of the side sheet, Adhering and fixing to form a continuous outer packaging member; disposing the continuous absorbent body in a central region in the moving direction of the continuous outer packaging member; adhering and fixing to form a continuous diaper body; A step of cutting the diaper body at a predetermined position between adjacent absorbent bodies to form individual diaper bodies, and maintaining the shape of each of the cut individual diaper bodies before cutting with respect to the moving direction. A reversing step of reversing by 90 degrees; an extending step of extending the inverted diaper body in the moving direction beyond the width dimension of the material to be used; The webs are aligned so that they are in contact with each other, and then a continuous web to be used as a material for the outer sheet for the waistband is supplied in a non-stretched state so as to sandwich both edges in the moving direction of the diaper body, and the diaper body connected body is adhered by adhesion. A step of forming a body, the diaper body connected body is bent from the central portion with the absorbent body inside, and the pair of waistband continuous webs are overlapped with each other; Joining both side edges of the individual diaper bodies of the diaper body coupling body, and then cutting the diaper body coupling body along the boundary line between the individual diaper bodies, and at the same time cutting the outside of the leg gathers. A method for manufacturing a diaper using a three-dimensional pants type characterized by.

The present invention also provides a liquid-permeable topsheet,
A liquid-impermeable backsheet, an absorbent main body composed of an absorbent body arranged between these sheets, at least the outermost layer sheet, and side sheets arranged on both side portions except the central region in the longitudinal direction of the outermost layer sheet. Have and with the front body,
A rear body and an exterior member having a side flap portion formed in a region in which the side sheet is arranged and extending and contracting in a width direction, the absorbent main body is joined to a central region in the longitudinal direction of the exterior member, and A three-dimensional structure in which opposite side edges of the side flaps of the exterior member are joined to form a waist opening and a pair of leg openings, and elastic elastic members are arranged along the waist opening and the leg openings. A method for manufacturing a pants-type diaper, the length of which is set in a central region between a continuous web to be a material of a liquid-permeable top sheet and a continuous web to be a material of a liquid-impermeable back sheet. Direction, a step of arranging absorbent bodies at a predetermined interval and adhering and fixing to form a continuous absorbent body, and a step of supplying a web having a width wider than the width of the diaper as a continuous web to be used as a material for the outermost layer sheet And a leg opening capable of forming leg gathers on both sides in the moving direction of the continuous web to be the material of the outermost layer sheet, excluding the central region in the moving direction in which the continuous absorbent body is to be arranged in a later step. One or more continuous stretchable elastic members to be stretchable elastic members are stretched and curved at a predetermined interval along the leg openings of the diaper to be supplied and bonded, and the continuous stretchable elastic members are covered. As described above, the continuous web having stretchable elasticity to be the material of the pair of side sheets overlaps with at least a part of both side edges of the continuous absorbent main body when the continuous absorbent main body is arranged in a later step. And the step of adhering and fixing, and a continuous web to be the material of the outermost layer sheet that extends outside both side edges of the continuous web to be the material of the side sheet, A step of folding back onto the upper surface of a continuous web to be used as a raw material and adhering and fixing the same to form a continuous exterior member, and disposing the continuous absorbent main body in a central region in the moving direction of the continuous exterior member, adhering and fixing the continuous diaper. A step of forming a main body, a step of cutting the continuous diaper body at a predetermined position between adjacent absorbent bodies to form individual diaper bodies, and the cut individual diaper bodies,
Reversing / extending step of retaining the shape before cutting and reversing 90 degrees with respect to the moving direction, and at the same time, extending the reversed diaper body in the moving direction more than the width dimension of the used material, and the diaper body in the stretched state. Are aligned so that the two longitudinal edges of each adjacent diaper body are in contact with each other, and then the continuous web to be used as the material for the pair of waistband exterior sheets is sandwiched so that both lateral edges of the diaper body are sandwiched. Supplying in an expanded state and adhering to form a diaper main body connected body, and bending the diaper main body connected body from the central part with the absorbent main body inside and superposing the pair of waistband continuous webs. And the side edges of the individual diaper bodies of the folded diaper body connection body are joined together, and then the diaper body connection body is attached along the boundary line between the individual diaper body connections. At the same time as the cross-sectional resides in method of producing a three-dimensional pant disposable diaper characterized in that it comprises a step of ablating the outer Regugyaza.

[0007]

According to the present invention, as in the three-dimensional pants type diaper of the present invention, at least the side flap portion expands and contracts in the width direction of the diaper body. By supplying a material having elasticity only in the vertical direction during the manufacturing process of the diaper, the material can be efficiently produced. Further, by using a non-stretchable material for the waistband exterior sheet and widening the attachment of the diaper body to the waistband, it is possible to efficiently produce a diaper with a good fit at the waist opening. Furthermore, the three-dimensional pants-type disposable diaper made by this manufacturing method has elastic elastic members around the entire circumference of the waist opening and leg openings, and the side flaps further expand and contract to create a supporter-like shape for the wearer. As it fits neatly around your waist, you can wear it comfortably with minimal leakage.

[0008]

The present invention will now be described in more detail with reference to the drawings showing examples of the present invention, but the present invention is not limited to these examples. FIG. 1 is a perspective view of a three-dimensional pants type disposable diaper, and FIG. 2 is a perspective view showing a state in which a side seam of the three-dimensional pants type disposable diaper is unfolded and expanded, and an elastic elastic member is stretched and fixed.

A three-dimensional pants-type disposable diaper 1 has a waist opening 2 and leg openings 3, and elastic elastic members 4 and 5 are attached to the entire circumference of the openings. The front seam 6 and the back seam 7 are formed to extend between the front seam 6 and the back seam 7, and the side seams 8 are joined to each other. Side seams 8
The outermost layer sheet 14 is folded at the center portion in the width direction so that the absorbent main body 12 is on the inside, and the front body 6 and the back body 7 are overlapped and joined with their both side edges protruding outward. There is. The joining of the both side edges can be performed by a single treatment or a combination of treatments such as hot melt adhesive, pressure melting, and ultrasonic wave. Further, the joined state of the both side edges may be a state in which the both side edges are protruded inward, or one side edge is placed outside and the other side edge is placed inside, and the like.

FIG. 3 is an exploded perspective view of the exterior member 16 and the absorbent main body 12 of the three-dimensional pants type diaper shown in FIG. FIG. 4 is a cross-sectional view taken along the line X-X of the three-dimensional pants type disposable diaper shown in FIG. 2 along the width direction of the central portion, and FIG. 5 is a waist opening portion of the three-dimensional pants type disposable diaper shown in FIG. 6 is a sectional view taken along line YY of FIG. 6, and FIG. 6 is an exploded perspective view of the three-dimensional pants type disposable diaper.

FIG. 7 shows a continuous web 114 which is wider than the width of the diaper and which is to be the material for the outermost sheet 14. The outermost layer sheet 14 has a use width of a and a diaper body width of b,
The central region in which the absorbent main body of b is arranged is c, the both side portions extending outward from the c are d, and the diaper main body width b
If both side parts extending outward are e, then there is a relationship of e ≧ d. FIG. 8 shows a plan view in which the e region extending outward from the width of the diaper is folded back onto the d region.

In the d region of the continuous web 114 to be the material of the outermost layer sheet 14, at predetermined positions of the web, at predetermined intervals,
One or more pair of continuous elastic members 105, which should be leg opening elastic members capable of forming leg gathers, are extended and curved at a predetermined interval along the leg openings of the diaper, and are bonded and arranged. To do. A continuous web 115 to be a material of a side sheet having stretch elasticity is provided on the d area so as to cover the continuous elastic member 105, and the continuous web 115 of the side sheet is covered so as to cover the continuous web 115. The e region of the continuous web 114, which is to be the material for the outermost layer sheet extending to both side edges, is folded back and fixed by adhesion to form the continuous exterior member 1.
16

9 to 10 show the main steps for manufacturing the three-dimensional pants type disposable diaper according to the present invention. In the following description, all the constituent materials of the three-dimensional pants type diaper are moving on the manufacturing line toward the final step of the manufacturing. In FIG. 9, the absorbent body 11 is disposed in the central region between the continuous webs 109 and 110, which should be the materials of the liquid-permeable top sheet 9 and the liquid-impermeable back sheet 10, in the moving direction from right to left in the figure. The continuous absorbent main body 112 that can be the absorbent main body 12 is formed by arranging the absorbent body 12 at a predetermined interval so that the longitudinal direction is along and adhesively fixed.
At least the width of the absorbent body 11 is extended at both side edges of the continuous absorbent main body 112 in the moving direction between the two sheets while extending one or more pair of continuous elastic members 113 which should be the flap elastic members 13. Adhesively arranged on the crotch part of the central area in the direction.

As the continuous web 114 to be the material of the outermost layer sheet 14, a web having a width wider than that of the diaper is supplied, and the continuous absorbent main body 112 is arranged in a subsequent step of the continuous web 114. The leg opening stretchable elastic members 5 capable of forming leg gathers should be formed on both sides in the moving direction (d areas shown in FIG. 7) except for the central area in the moving direction (c area shown in FIG. 7) which is to be moved. A pair of the continuous elastic members 105, which are equal to or more than one, are curved and supplied at predetermined intervals along the leg openings of the diaper while being stretched, and are bonded and arranged.

A continuous web 126, which is to be the material of the intermediate sheet 26 of the outermost layer sheet 14, is arranged in the central region of the continuous web 114 in the moving direction, and is fixed by adhesion. Further, a continuous web 115 having elastic elasticity to be used as a material for the pair of side sheets 15 of the side flap portion 20 of the diaper is supplied so as to cover the continuous elastic member 105,
Adhere and fix. Then, both side portions (regions e shown in FIG. 7) of the continuous web 114, which is to be the material of the outermost layer sheet and extends outside both side edges of the continuous web 115, are folded back onto the upper surface of the continuous web 115 and bonded. It is fixed and the continuous exterior member 116 is formed.

The continuous exterior elastic member 116 is arranged so that the widthwise central region of the absorbent body of the continuous absorbent main body 112 coincides with the portion where the space between the pair of continuous elastic elastic members 105 arranged in a curve is narrow, and is fixed by adhesion. To form a continuous diaper body 117. The continuous diaper body 117 is cut at a predetermined position between the absorbers to form individual diaper bodies 17, and the obtained diaper body 17 is maintained at the shape before cutting and inverted by 90 degrees in the moving direction. The inverted individual diaper body 17
With the top sheet 9 facing upward, extending in the moving direction more than the width dimension of the material used, and aligning the diaper bodies 17 in the extended state so that the longitudinal side edges of the adjacent individual diaper bodies 17 are in contact with each other. Then, the continuous web 11 to be used as a material for the pair of waistband exterior sheets 18 so that both sides of the diaper body 17 in the moving direction partially overlap.
8 is supplied in a non-stretched state, and adhesively fixed at the overlapping portion with both side edges of the diaper body 17 in the moving direction. The production efficiency can be improved by performing the 90-degree reversal of the diaper body 17 and the extension in the moving direction at the same time.

The pair of waistband continuous webs 1
At 18, one or more continuous stretchable elastic members 104, which should be the waist opening stretchable elastic members 4, are stretched under the web 1
It is arranged within a half of the width of 18 and fixed by adhesion, and then the web 118 is folded back at its center so as to cover the continuous elastic member 104, and both side edges of the diaper body 17 in the moving direction are sandwiched and fixed by adhesion. At the same time as forming the waist gather part, the adjacent individual diaper bodies 17 are
The diaper main body connected body 129 is formed by connecting the both side edges in the longitudinal direction in contact with each other. The diaper body connected body 1
29 is folded with the absorbent main body 12 inside, and is bent along the center line in the moving direction, and the pair of waistband continuous webs 118 are superposed. Both side edges of the individual diaper bodies 17 of the folded diaper body coupling body 129 are joined by heat sealing, and then the diaper body coupling body 12 is provided along the boundary line between the adjacent individual diaper bodies 17.
At the same time as cutting 9 out, the outside of the leg gathers is cut off to obtain a diaper 1 by using individual three-dimensional pants type.

Further, in the manufacturing method of the present invention, after forming the diaper main body connected body 129, the leg gathers are cut off to form leg openings, and then the diaper main body connected body 129 is attached to the absorbent main body 12. Inside, and bent through the center line in the moving direction, the pair of waistband continuous webs 118 are overlapped, and both side edges of the individual diaper body 17 of the folded diaper body connected body 129 are heat-sealed. After joining, the diaper body connecting body 129 is cut along the boundary line between the adjacent individual diaper bodies 17, and the individual three-dimensional pants-type disposable diaper 1 is cut.
May be used.

As shown in FIGS. 3 to 6, the three-dimensional pants type disposable diaper 1 manufactured according to the present invention basically comprises an exterior member 16, an absorbent main body 12 and a waist band 19. . The absorbent main body 12 has a liquid-permeable top sheet 9, a liquid-impermeable back sheet 10, and an absorbent body 11 having a length and a width smaller than those of the both sheets interposed between the absorbent body 12 and the absorbent body 12. The backsheet portion extending laterally is folded back onto the absorbent body to form the flap 2
1 is formed and the overlapping portions of the top sheet 9 extending outside the absorbent body 11 and the folded flap 21 are bonded to each other in both end regions along both side edges of the absorbent body 11, and the upper surface of the absorbent body is longitudinally aligned with the overlapped portion. If at least one flap elastic elastic member 13 is provided along at least a part of the length of each free edge of the flap 21 arranged over the flap 21, and the flap elastic elastic member 13 is left unconstrained, the flap The elastic elastic member 13 contracts freely, and each free edge of the flap on which the flap elastic member 13 is arranged rises from the base end portion 28, and the absorber 1
The back sheet 10 and the absorber 11 form a pouch, which is separated from 1 and has an opening with gathers.

In the above-mentioned embodiment, the backsheet 10 portion extending laterally from the absorbent body 11 is folded back on the absorbent body,
The flap 21 is formed by fixing its longitudinal ends, but the flap 21 does not fold the backsheet 10 portion extending laterally from the absorbent body 11 onto the absorbent body and keeps it as it is. In this state, one or more flap elastic members 13 may be arranged along at least a part of both side edges. The top sheet 9 used here is a liquid-permeable sheet, and for example, a liquid-permeable nonwoven fabric made of polyethylene, polypropylene, or other thermoplastic fiber is used.

The flap elastic elastic member 13, the leg opening elastic elastic member 5 and the waist opening elastic elastic member 4 arranged at the free edge of the flap 21 are usually urethane film, urethane thread, urethane foam, thread rubber, etc. What is used in the disposable diaper can be used as it is. Further, the elastic elastic members are respectively arranged in a stretched state at the free end of the flap, the leg opening and the waist opening, and are bonded and fixed by a hot melt adhesive.

The absorbent body 11 is preferably made of fluff pulp as a main material together with a superabsorbent polymer, and other absorbent paper alone or a mixture or laminate of heat-fusible fibers is used. Further, as shown in FIG. 4, it is preferable that a fluff pulp is mixed in the upper layer 22, a fluff pulp and a super absorbent polymer are mixed or laminated in the lower layer 23, and the mixture is further wrapped in a tissue. The shape of the absorber 11 may be an hourglass shape or a rectangular shape, but the hourglass shape can obtain a better fit.

The back sheet 10 is preferably a liquid-impermeable polyethylene sheet, for example, a moisture-permeable liquid-permeable sheet such as a polyethylene sheet having micropores or a moisture-permeable liquid-permeable sheet formed by adding a filler to a thermoplastic resin and stretching. It is comfortable without worrying about stuffiness. The backsheet needs to have a thickness of 20 to 40 μm.
Further, as shown in FIG. 4, the flap 2 of the back sheet 10
1 is a liquid impermeable sheet 2 separate from the back sheet 10
4 and a nonwoven fabric 25. As the composite sheet, a composite material laminated such that polyethylene, which is thinner and softer than the back sheet 10, is wrapped inside, so that a non-woven fabric for improving the touch is arranged on the side around the legs that touches the skin. Is used. In this case, it is necessary that the composite sheet has a polyethylene of 5 to 20 μm and the nonwoven fabric has a basis weight of 10 to 25 g / m ² .

The composite sheet comprising the liquid impermeable sheet 24 and the non-woven fabric 25 may be a composite sheet in which the liquid impermeable sheet 24 is laminated on the entire inner surface of the non-woven fabric 25 as shown in FIG. Any composite sheet may be used in which the film is laminated from the base end portion 28 of the flap to the free edge while leaving a part of the nonwoven fabric 25. The method for laminating the composite sheets may be any one of extrusion laminating method, dry laminating method, pressure fusion bonding by hot embossing, bonding with hot melt adhesive, ultrasonic bonding and the like.

The side sheet 15 having elastic properties, which is attached to the side flap portion 20 of the diaper, is 5 to 40.
A polyurethane-based film having a thickness of μm and having elasticity and elasticity, a natural rubber sheet, a foamed sheet, or the like is used.
When the sheet does not have moisture permeability, it is effective to prevent stuffiness by adding physical processing such as forming fine holes in the sheet. The side sheet 15 has a basis weight of 20 to 70 g / m ² ,
Elastic stress at 50% elongation is 300g in one longitudinal and lateral direction
It is preferable that the width is / 25 mm or less and the recovery rate upon stress relaxation is 80% or more.

As the non-stretch elastic outermost layer sheet 14,
Polyester fiber such as polyethylene terephthalate fiber, polyolefin fiber, polyamide fiber such as nylon fiber, cellulose fiber such as cotton fiber, obtained by hydroentangling fibers selected from materials including pulp fibers and mixtures thereof, A hydrophilic or water repellent nonwoven fabric is used. These non-woven fabrics stretch when a tensile force is applied, but when they are released from the tensile force, they do not have a contracting force to return to their original state.

The outermost sheet 14 formed of the sidesheet 15 attached to the side flap portion 20 of the outermost sheet 14 has a property of being easily stretched when a tensile force is applied, such as a hydroentangled nonwoven fabric. The outermost sheet 1 works by suppressing elongation and maintaining adhesion to the absorbent main body 12, and by forming the side sheet 15 with a sheet having elastic elasticity, a stronger tensile force acts.
Even when irreversible elongation occurs in No. 4, the outermost sheet 1 due to the contracting force of the side sheet 15 having elastic elasticity properties.
4 is returned to its original state, and the original fit and leak prevention function are not impaired.

As shown in FIG. 4, the absorbent main body 12 is attached to the exterior member 16 via an adhesive region 27 provided on the intermediate sheet 26 covering the central portion of the outermost layer sheet 14. The adhesive region 27 is made of a hot melt adhesive, and various shapes such as a linear shape, a broken line shape, a dot shape, a curved shape, and a spiral shape can be applied to the whole or part of the intermediate sheet 26. From the point that the absorbent main body 12 is well adhered to the exterior member 16 and the wearer has a good feel when wearing the diaper, from the two straight lines provided along the both side edges of the intermediate sheet 26. What
Alternatively, it is preferable to use an H-shaped one formed by combining a straight line provided over the entire length of the central portion of the intermediate sheet 26 in the longitudinal direction and two straight lines provided along the waist opening of the intermediate sheet. At the time of wearing the diaper, the flap 21 of the absorbent main body 12 rises at the center in the longitudinal direction by the contracting force of the flap elastic member 13 provided at the flap free edge, and always comes into close contact with the body of the diaper wearer.
A pouch is formed between the free edge and the flap proximal end 28 to prevent leakage.

As shown in FIG. 4, the flap 21 is located inside the elastic member 5 of the leg opening. When the flap 21 is formed by using a composite material in which the non-woven fabric 25 is present outside the both side edges of the liquid impermeable sheet 24, and the flap 21 provided with the elastic portion 13 for the flap portion is formed, the feel is better, You can get a good fit without the hassle. In addition, as shown in FIGS. 4 and 9, the side seat 15 (11) having the elastic property of expansion and contraction.
In the central region of the outermost layer sheet 14 (114) on which 5) is not laminated, an intermediate sheet 26 (126) made of a polyethylene sheet or the like is attached to reinforce the portion.

As the intermediate sheet 26, a polyethylene sheet having fine pores, a breathable sheet obtained by adding a filler to a thermoplastic resin and stretching, a mesh sheet, a non-woven fabric, or the like is used, and if the breathability or the breathability is imparted, there is a fear of getting stuffy. Is more comfortable than. Furthermore, by disposing a plurality of elastic elastic members 5 in the leg openings 3, it is possible to fit a wide planar region well around the legs and minimize leakage from around the legs. As shown in FIG. 4, the side edge of the side sheet 15 and the side edge of the intermediate sheet 26 overlap and adhere to each other. The adhesive width is preferably 1 to 20 mm from the side edge of the side sheet 15 on the center side of the diaper.

If a sheet having ventilation and water permeability such as a non-woven sheet is used as the waist band exterior sheet 18, there is no fear of getting stuffy and the sweat of the wearer can be absorbed, so that it is comfortable to the touch and comfortable. Further, it is possible to enhance leakage prevention by using a water repellent non-woven fabric or the like. As the waist opening stretchable elastic member 4 arranged in the stretched state on this sheet, urethane thread, thread rubber, urethane film, urethane foam or the like is used. As shown in FIG. 5 and FIG. 10, the waistband exterior sheet 18 (118) is attached to the diaper body 17 at one side edge of the upper surface of the pair of waistband continuous webs 118 in the non-stretched state in the moving direction of the sheet. The diaper main body 1 whose part is stretched in the waist width direction
The continuous web 11 for the waist band is arranged so as to overlap with at least a part of both longitudinal edges of the diaper 7, is fixed by adhesion, and sandwiches the longitudinal edges of the diaper body 17 in a U-shape.
It is made by folding back at the center of the moving direction of 8.

FIG. 11 shows another embodiment of the disposable diaper according to the present invention. In this embodiment,
The diaper which does not make an absorber part a pad structure is shown. In the diaper of this embodiment, leg gathers are formed at predetermined intervals at predetermined positions of the web except the central region in the moving direction of the continuous web 114 to be the material of the liquid impermeable outermost sheet 14 in FIGS. 9 and 10. While extending one or more pair of continuous elastic members 105, which should be elastic leg opening elastic members,
The diaper body is curved and supplied at a predetermined interval along the leg openings of the diaper body, and is adhesively arranged. In the central region of the continuous web 114 to be the material of the outermost layer sheet 14, the absorbers 11 are arranged at predetermined intervals in the lengthwise direction and adhered and fixed, and a liquid-permeable top is provided so as to cover the absorbers. A continuous web 109 to be the material of the sheet 9 is supplied and fixed by adhesion. A continuous web 115 to be a material for the pair of side sheets 15 is supplied to the side flaps of the diaper so as to cover the continuous elastic member 105 to be the leg opening elastic member capable of forming the leg gathers, and the side webs are bonded to each other. Fix it into a continuous laminate.

In the diaper of FIG. 11, on the absorber,
A flap 21 having a flap elastic member 13 is formed. At least one flap portion elastic member 13 is disposed in the flap 21 in a stretched state at least in the central portion,
If the flap portion elastic elastic member 13 is left unadhered after being fixed by adhesion, the flap portion elastic elastic member 1
3 contracts freely and rises to form a three-dimensional gather. The flap 21 may be formed of any member such as both free edges of the top sheet, center side free edge of the side sheet, a member separate from the top sheet and the side sheet. At this time, the base end portion 28 of the flap exists on the absorbent body.

In the present embodiment, the outermost sheet 14 is made of a non-stretchable web wider than the width of the diaper, and the side sheet 15 is made of a stretchable web having the width of the diaper. Further, the side sheet 15 having elastic elasticity is 5 to 40 μm.
A m-thick polyurethane film having moisture permeability and elasticity, a natural rubber sheet, a foamed sheet or the like is used. When the sheet does not have moisture permeability, it is effective to prevent stuffiness by adding physical processing such as forming fine holes in the sheet.
The side sheet 15 has a basis weight of 20 to 70 g / m ² , 50
% Elastic stress at extension is 300g / 2 in one direction
It is preferable that the width is 5 mm or less and the recovery rate upon stress relaxation is 80% or more.

As the non-stretch elastic outermost layer sheet 14, a material containing polyester fiber such as polyethylene terephthalate fiber, polyolefin fiber, polyamide fiber such as nylon fiber, cellulose fiber such as cotton fiber, pulp fiber and a mixture thereof. A hydrophilic or water repellent nonwoven fabric obtained by hydroentangling fibers selected from is used. These non-woven fabrics stretch when a tensile force is applied, but when they are released from the tensile force, they do not have a contracting force to return to their original state.

The side sheet 15 attached to the outermost layer sheet 14 suppresses the elongation of the outermost layer sheet 14 which is formed of a sheet having a property of being easily stretched especially when a tensile force is applied, such as a hydroentangled nonwoven fabric, The side sheet 15 has a function of maintaining close contact with the absorbent main body 12, and by constructing the side sheet 15 with a sheet having elastic elasticity, stronger tensile force acts to cause irreversible elongation of the outermost layer sheet. Even if the side sheet 15 has elastic properties
The outermost sheet 14 is returned to its original state by the contracting force of
The original fit and leak prevention function are not impaired.

[0037]

As described above, according to the present invention, there is no leakage of excrement, good fit property, excellent moisture permeability, and comfortable touch to the wearer, and the wearer can wear it efficiently. It is possible to produce and provide a more economical diaper.

[Brief description of drawings]

FIG. 1 is a perspective view of a three-dimensional pants-type disposable diaper of the present invention.

FIG. 2 is a perspective view showing a state in which the side seams of the three-dimensional pants-type diaper shown in FIG. 1 are unfolded and expanded, and the stretchable elastic body is stretched and fixed.

FIG. 3 is an exploded perspective view of an absorbent main body and an exterior member of the three-dimensional pants type disposable diaper shown in FIG.

FIG. 4 is a sectional view taken along line X-X of the three-dimensional pants-type disposable diaper of FIG.

5 is a cross-sectional view taken along the line YY of the three-dimensional pants-type disposable diaper of FIG.

FIG. 6 is an exploded perspective view of the three-dimensional pants type disposable diaper of the present invention.

FIG. 7 is a plan view of the outermost layer sheet wider than the width of the diaper.

FIG. 8 is a plan view of the outermost sheet folded back to the width of the diaper body.

FIG. 9 is a partial plan view schematically showing the first half step of the manufacturing method according to the present invention.

FIG. 10 is a partial plan view schematically showing the latter half step of the manufacturing method according to the present invention.

FIG. 11 is a sectional view showing a three-dimensional pants type disposable diaper of another embodiment, taken along line XX in FIG.

[Explanation of symbols]

1: Three-dimensional pants type disposable diaper 2: Waist opening 3: Leg opening 4: Waist opening elastic member 5: Leg opening elastic member 6: Front body 7: Back body 8: Side seam 9: Top Seat 10: Backsheet 11: Absorber 12: Absorbent body 13: Flap elastic elastic member 14: Outermost layer sheet 14 ': Folded part of outermost layer sheet 15: Side sheet 16: Exterior member 17: Diaper body 18: Waist Exterior sheet for band 19: Waist band 20: Side flap part 21: Flap 22: Upper layer absorbent body 23: Lower layer absorbent body 24: Liquid impermeable sheet of flap part 25: Non-woven fabric of flap part 26: Intermediate sheet 27: Absorbent Linear adhesive region in the central region in the longitudinal direction of the main body 28: flap base end 104: waist opening continuity to be elastic elastic member Collapsible elastic member 105: Continuous elastic elastic member that should be a leg opening elastic elastic member 109: Continuous web that should be a material for topsheet 110: Continuous web that should be a material for backsheet 112: Continuous absorbent body 113: Flap portion Continuous stretchable elastic member to be a stretchable elastic member 114: Continuous web to be a material of outermost layer 115: Continuous web to be a material of side sheet 116: Continuous exterior member 117: Continuous diaper body 118: Exterior sheet for waist band Continuous web 126 that should be the material of the above: Continuous web 129 that should be the material of the intermediate sheet: Connected body of diaper body

Claims (2)

[Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent main body composed of an absorbent body disposed between these sheets, at least an outermost layer sheet, and a longitudinal direction of the outermost layer sheet. Having side sheets arranged on both sides except the central region, and consisting of a front body, a back body, and an exterior member having side flap portions formed in the region in which the side sheets are arranged to expand and contract in the width direction, The absorbent main body is joined to a central region in the longitudinal direction of the exterior member, and opposite side edges of the side flaps of the exterior member are joined to form a waist opening and a pair of leg openings. A method for manufacturing a three-dimensional pants-type diaper in which elastic members are arranged along the waist opening and the leg openings, which is a continuous web to be used as a material for a liquid-permeable top sheet. And a step of forming a continuous absorbent main body by arranging an absorber at a predetermined interval in the length direction in the central region between the continuous webs to be the material of the liquid-impermeable backsheet, and adhering and fixing the same. As a continuous web to be the material of the outermost layer sheet, a step of supplying a web having a width wider than the width of the diaper, a continuous web to be the material of the outermost layer sheet, in the subsequent step the continuous absorbent body is A leg opening stretchable elastic member capable of forming leg gathers on both sides in the movement direction except for the central region in the movement direction to be arranged 1
A step of supplying the above continuous elastic members by bending them at a predetermined interval along the leg openings of the diaper while being stretched and adhering them, and by covering the continuous elastic members with a pair of sides. When the continuous absorbent body is arranged in a later step, a continuous web having elastic properties to be used as a sheet material is arranged so as to overlap with at least a part of both side edges of the continuous absorbent body, and fixed by adhesion. And the continuous web to be the material of the outermost layer sheet that extends outside both side edges than the continuous web to be the material of the side sheet, is folded back to the continuous web upper surface to be the material of the side sheet, Adhering and fixing to form a continuous outer packaging member; disposing the continuous absorbent body in a central region in the moving direction of the continuous outer packaging member; adhering and fixing to form a continuous diaper body; A step of cutting the diaper body at a predetermined position between adjacent absorbent bodies to form individual diaper bodies, and maintaining the shape of each of the cut individual diaper bodies before cutting with respect to the moving direction. A reversing step of reversing by 90 degrees; an extending step of extending the inverted diaper body in the moving direction beyond the width dimension of the material to be used; The webs are aligned so that they are in contact with each other, and then a continuous web to be used as a material for the outer sheet for the waistband is supplied in a non-stretched state so as to sandwich both edges in the moving direction of the diaper body, and the diaper body connected body is adhered by adhesion. A step of forming a body, the diaper body connected body is bent from the central portion with the absorbent body inside, and the pair of waistband continuous webs are overlapped with each other; Joining the side edges of the individual diaper bodies of the connected diaper body, and then cutting the diaper body connection along the boundary line between the individual diaper bodies while simultaneously cutting the outside of the leg gathers. A method for manufacturing a diaper using a three-dimensional pants type characterized by. 2. A liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent main body composed of an absorber arranged between these sheets, at least an outermost layer sheet, and a longitudinal direction of the outermost layer sheet. Having side sheets arranged on both sides except the central region, and consisting of a front body, a back body, and an exterior member having side flap portions formed in the region in which the side sheets are arranged to expand and contract in the width direction, The absorbent main body is joined to a central region in the longitudinal direction of the exterior member, and opposite side edges of the side flap portion of the exterior member are joined to form a waist opening and a pair of leg openings. A method for manufacturing a three-dimensional pants-type diaper in which elastic members are arranged along the waist opening and the leg openings, which is a continuous web to be used as a material for a liquid-permeable top sheet. And a step of forming a continuous absorbent main body by arranging an absorber at a predetermined interval in the length direction in the central region between the continuous webs to be the material of the liquid-impermeable backsheet, and adhering and fixing the same. As a continuous web to be the material of the outermost layer sheet, a step of supplying a web having a width wider than the width of the diaper, a continuous web to be the material of the outermost layer sheet, in the subsequent step the continuous absorbent body is A leg opening stretchable elastic member capable of forming leg gathers on both sides in the movement direction except for the central region in the movement direction to be arranged 1
A step of supplying the above continuous elastic members by bending them at a predetermined interval along the leg openings of the diaper while being stretched and adhering them, and by covering the continuous elastic members with a pair of sides. When the continuous absorbent body is arranged in a later step, a continuous web having elastic properties to be used as a sheet material is arranged so as to overlap with at least a part of both side edges of the continuous absorbent body, and fixed by adhesion. And the continuous web to be the material of the outermost layer sheet that extends outside both side edges than the continuous web to be the material of the side sheet, is folded back to the continuous web upper surface to be the material of the side sheet, Adhering and fixing to form a continuous outer packaging member; disposing the continuous absorbent body in a central region in the moving direction of the continuous outer packaging member; adhering and fixing to form a continuous diaper body; A step of cutting the diaper body at a predetermined position between adjacent absorbent bodies to form individual diaper bodies, and maintaining the shape of each of the cut individual diaper bodies before cutting with respect to the moving direction. At the same time as being inverted by 90 degrees, the inverted diaper body is extended in the moving direction by more than the width of the material being used, and the diaper body in the extended state is moved to both side edges of the adjacent diaper bodies in the longitudinal direction. Are aligned so that they contact each other, and then a pair of continuous webs to be the material for the waistband exterior sheet is supplied in a non-stretched state so as to sandwich both edges in the moving direction of the diaper body, and the diaper body connected body is adhered by adhesion. Forming step, bending the diaper main body connected body from the central part with the absorbent main body inside, stacking the pair of waistband continuous webs, and the bending Joining both side edges of the individual diaper bodies of the diaper body coupling body, and then cutting the diaper body coupling body along the boundary line between the individual diaper bodies, and at the same time cutting the outside of the leg gathers. A method for manufacturing a diaper using a three-dimensional pants type characterized by.