JP2008104873A - Paper diaper and forming method of elastic waist part with stopper part in paper diaper manufacture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper diaper capable of being used as both a tape type diaper and a pants type diaper and snugly fitting the wearer's body. <P>SOLUTION: The paper diaper has a waist section 10 including an intermediate section 10c and side flaps 11, 12 projecting from both sides of the intermediate section and wound around the waist of the wearer, an absorptive body 20 connected at its back end section 20B to the intermediate section 10c of the waist section 10 and installed so as to cover from the back side through a crotch section and up to the belly side, hook tapes 15, 15 arranged on the inner surfaces of the side flaps 11, 12, respectively, of the waist section 10, and exterior nonwoven fabric 24 provided on the absorptive body 20, on the outer surface of its front end section. The hook tapes 15, 15 on the inner surfaces of both side flaps are individually removably connectable to the nonwoven fabric 24 on the outer surface of the absorptive body 20. Perforated lines 16, 16 are formed in both side flaps 11, 12, respectively. In each side flap, the perforated line 16 extends in the lateral direction of the product from the middle, in the up-down direction, of the forward end edge of the side flap to an intermediate section 10c side. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a paper diaper that can be used both as a tape type and as a pants type, and a method for forming a stretchable waist part having a fastening part in the manufacture of such a paper diaper.

The pants-type disposable paper diaper has a waist opening and a pair of left and right leg openings formed by joining both sides of the front body and both sides of the back body, respectively. It is worn by inserting both feet of the wearer through the waist opening and inserting it into the leg opening.
On the other hand, in use, it is applied to the wearer in a state where the dorsal side and the abdominal side are not joined, and the distal ends of the locking pieces provided on both sides of the dorsal side are fixed to the abdominal outer surface. There is also a type called a formula or a tape type.
Moreover, as shown in Patent Document 1, a paper diaper that can be used as both a pants type and a fixed type has been proposed. This paper diaper has a back part, a front belt part extending from the back part to both sides in the width direction, and an absorbent main body that can be folded back from the back part to the front side of the wearer through the crotch and is wrapped around the waist It can be worn in a form in which the front belt portion and the folded absorbent main body are fastened on the front side of the wearer.
JP-A-2005-270359

However, since the thing of the said patent document 1 ensured the fitting property with respect to a body substantially only by a waist part, compared with a pants-type exclusive product, especially fitting property of the absorber in the crotch side, There is a problem that the fit for a non-standard body wearer is poor.
Then, the main subject of this invention is providing the formation method of the elastic waist part which has a fastening part in the manufacture of the paper diaper which can be used as a tape type and a pants type | mold, and is excellent in fit.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
A belt-like waistline portion wound around a wearer's waistline having an intermediate portion and stretchable side flap portions projecting on both sides thereof;
One end of the front-rear direction is connected to the middle part of the waistline part, and the absorbent main body is mounted so as to cover from the back side through the crotch part to the abdomen side,
Fastening portions respectively provided on the inner surfaces of both side flap portions in the waistline portion,
A connecting portion provided on the outer surface of the front end portion of the absorbent main body,
Fastening portions on the inner surfaces of both side flap portions are disposable diapers configured to be detachably connected to the connecting portion of the outer surface of the absorbent main body,
The stretchable side flap portion has a vertical dimension that is 1/5 or more of the total length of the disposable diaper. The stretch stress in the product width direction of the upper portion and the stretch stress in the product width direction of the lower portion are Configured differently,
Paper diapers characterized by that.

(Function and effect)
In the present invention, the front side part of the absorbent main body is brought to the ventral side, both side flaps are brought on it, and the fastening portions of the inner surfaces of both side flaps are connected by being connected to the connecting part of the outer surface of the absorbent main body. it can. At this time, since the side flap portions have elasticity, a usage form as a pants type in which both side flap portions are attached after being connected to the absorbent main body becomes easy. Moreover, since the vertical dimension of the side flap part is 1/5 or more of the total length of the disposable diaper, excellent fit around the waist can be obtained.
As described in this section, the waist-side tightening and the crotch-side tightening can be individually optimized by making the vertical stretching stresses different. In addition, the tensile stress at the time of elastic deformation in the present invention means a tensile stress when contracted by 15% with respect to the body width at the time of maximum extension in the width direction.

<Invention of Claim 2>
The disposable diaper according to claim 1, wherein each of the stretchable side flap portions is provided with a perforation extending from the middle in the vertical direction of the tip edge toward the middle portion along the product width direction.

<Invention of Claim 3>
The disposable diaper according to claim 2, wherein the perforation is provided on a boundary line having different stretching stresses in each of the stretchable side flap portions.

(Function and effect)
In the present invention, by separating the perforation, the side flaps can be divided into two upper and lower stages, so that each side flap can be connected to a plurality of locations, and the parts divided into the upper and lower two stages are absorbed at different angles. Can be connected to the body.
Therefore, the fit can be adjusted according to the wearer's body shape, especially by lifting the absorbent main body by connecting the lower part of the part divided into the upper and lower parts to the part closer to the crotch side Can fit the body.

<Invention of Claim 4>
The fastening portions of the both side flap portions are provided by a hook tape having a large number of hook-shaped protrusions on the surface, and the connecting portion of the absorbent main body is a non-woven fabric that forms the outer surface of the absorbent main body, The disposable diaper according to any one of claims 1 to 3, wherein the detachable connection is performed by engaging a hook tape on an inner surface of the flap portion with a nonwoven fabric on the outer surface of the absorbent main body.

(Function and effect)
If the outer surface of the absorbent main body is formed of a non-woven fabric as described in this section and the hook tape of the side flap portion is engaged with this, the portion of the connecting portion on the outer surface of the absorbent main body is not limited. Therefore, since the fastening site | part of the side flap part divided | segmented with the perforation can be selected in a wider range, it is especially suitable for this invention. Further, a target tape such as a female material of a mechanical fastener may be provided over a wide range of the outer surface of the absorbent main body, but in that case, air permeability and flexibility are reduced. Therefore, it is preferable to employ the connecting means described in this section from the viewpoint of air permeability and flexibility.

<Invention of Claim 5>
The paper diaper of Claim 4 with which the embossing is provided to the nonwoven fabric of the said absorptive main body outer surface.

(Function and effect)
When the hook tape is engaged with the nonwoven fabric on the outer surface of the absorbent main body, it is preferable to reinforce the nonwoven fabric by embossing as described in this section.

<Invention of Claim 6>
The fastening portions of the side flap portions are formed by hook tape having a large number of hook-shaped protrusions on the surface, and the fastening portions have a vertical dimension that is 4/5 or more of the side flap portions. The fastening portion has a linear shape in which a side edge on one side in the waistline direction extends along the longitudinal direction perpendicular to the waistline direction, and a side edge on the other side in the waistline direction extends in the longitudinal direction while being displaced in the waistline direction. The disposable diaper according to any one of claims 1 to 5, wherein the disposable diaper has an existing wavy shape.

(Function and effect)
In the form of the paper diaper of the present invention, it is preferable to provide a fastening portion in a wide range and exhibit a sufficient fastening force. From this viewpoint, it is preferable to use a hook tape of a mechanical fastener (surface fastener) as the fastening portion. However, since the hook tape is harder than other members, simply providing it over a wide range deteriorates the touch and increases the cost. On the other hand, in the invention described in this section, not only the fastening part is formed by hook tape, but also by having a shape having a wavy side edge, the fastening force is reduced by the wide part of the fastening part. While preventing, a soft part can be improved by a narrow part.

<Invention of Claim 7>
The fastening portions of the side flap portions are formed by hook tape having a large number of hook-shaped protrusions on the surface, and the fastening portions have a vertical dimension that is 4/5 or more of the side flap portions. The paper diaper according to any one of claims 1 to 5, wherein the fastening portion is provided intermittently in a longitudinal direction orthogonal to the waistline direction and at least at both longitudinal ends of the side flap portion.

(Function and effect)
In the invention described in this section, since the hook tape is intermittently provided in the vertical direction, it is more excellent in flexibility and air permeability. In addition, since hook tapes are provided at both ends in the longitudinal direction where force is particularly easily applied, the amount of expensive hook tape used can be reduced without impairing the fastening force.

<Invention of Claim 8>
A belt-like waistline portion wound around a wearer's waistline having an intermediate portion and stretchable side flap portions projecting on both sides thereof;
One end of the front-rear direction is connected to the middle part of the waistline part, and the absorbent main body is mounted so as to cover from the back side through the crotch part to the abdomen side,
Fastening portions respectively provided on the inner surfaces of both side flap portions in the waistline portion,
A connecting portion provided on the outer surface of the front end portion of the absorbent main body,
When manufacturing the disposable diaper configured such that the fastening portions of the inner surfaces of both side flap portions are detachably connected to the connecting portion of the outer surface of the absorbent main body, the waist portion is formed.
While conveying the continuous belt-like base material sheet along the continuous direction, a pair of continuous hook tapes are spaced at predetermined intervals on both sides of the continuous belt-like base material sheet in the transverse direction. Individually fastened having a hook tape on both sides in the transverse direction and an area without a hook tape between them by cutting them at a predetermined interval in the conveying direction after being stuck together and sequentially Forming a part forming sheet,
Turn the conveying direction of this fastening part forming sheet 90 degrees,
Adjacent to the conveying direction of the continuous belt-shaped main body sheet while the continuous belt-shaped main body sheet having a portion that becomes the waistline portion is repeated in the longitudinal direction and the waistline direction and the longitudinal direction coincide with each other along the continuous direction The fastening part forming sheets were sequentially pasted so as to straddle the boundary of the waistline part to be positioned, and to locate the boundary in a region not having the hook tape, and to position the hook tape on both sides of the boundary. Thereafter, the main body sheet is sequentially cut together with the fastening portion forming sheet at the boundary.
A method for forming a stretchable waistline portion having a fastening portion in the manufacture of a paper diaper.

(Function and effect)
In such a forming method, hook tapes formed by cutting the fastening portion forming sheet are provided at both ends of the waistline direction of the waist portion that is individualized by cutting. Therefore, two hook tapes can be provided by attaching the fastening part forming sheet once. Therefore, efficient production becomes possible. In addition, when forming the fastening part forming sheet, the hook tape is attached to the base sheet with a gap, and the fastening part forming sheet is turned 90 degrees, and then attached to the main body sheet. When cut in a region that does not have, a portion without the hook tape is easily formed on both sides of the waistline portion in the waistline direction, and this portion can be used as a portion for forming a joint line to the knob or the main body sheet.

  As described above, according to the present invention, there are advantages such as being able to be used as a tape type and a pants type, having excellent fit, and being able to change an assembling procedure according to the posture of the wearer.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The “up and down” direction in the present invention is the up and down direction when the paper diaper is assembled in a pants shape, with the upper side being the waistline opening and the lower side being the crotch side.
<Embodiment of paper diaper>
FIG. 1 is a plan view of the inner side of a disposable diaper that can be used as a pants-type or a fixed type, FIG. 2 is a plan view of the outer side of the deployed state, and FIGS. It is a front view of a pants state. The paper diaper according to the present embodiment includes an intermediate portion 10c and side flap portions 11 and 12 projecting from both sides of the middle portion 10c. The belt-like waist portion 10 is wound around the waist of the wearer, and the rear end portion is the waist portion 10. The absorptive main body 20 is connected to the intermediate portion 10c of the knives and is mounted so as to cover the back side through the crotch portion and the abdomen side.

The absorbent main body 20 has a rectangular shape with the longitudinal direction of the product as the longitudinal direction, and is provided along the center in the width direction of the product so as to cover the wearer's abdomen, crotch portion, and buttocks, and the rear end portion 20B is It is fixed to the inner surface of the intermediate portion 10c of the waistline portion 10 by hot melt bonding or the like in a non-detachable manner.
In addition, it cannot be overemphasized that the rear-end part 20B of the absorptive main body 20 can also be connected to the inner surface of the intermediate part 10c of the waist part 10 using an adhesive tape, a target tape, etc. so that attachment or detachment is possible. This is preferable because only the absorbent main body 20 that is soiled during diaper replacement can be removed and a new absorbent main body 20 can be attached.
The absorbent main body 20 receives the excrement and absorbs and holds the liquid component. As shown in FIGS. 3 to 5, the absorbent main body 20 has a liquid-permeable top sheet 21 that forms a use surface in contact with the body, and a liquid impermeable material. It has the structure which has the permeable sheet 23 and the absorber 22 interposed between these, and the top sheet | seat 21 and the liquid-impermeable sheet | seat 23 were joined by hot-melt adhesion etc. in the peripheral part.
Moreover, you may attach the flap formation member which is smaller than the waist part 10 and does not have a stretching property in the edge part which opposes the edge part to which the waist part 10 was attached of the absorptive main body 20. In this way, when small flaps are provided on both sides in the vicinity of the end of the absorbent main body on the opposite side of the waistline portion 10, the connection when aligning the fastening portion and the connecting portion when mounting as a fastening type It can be used as a knob part of the part, which is preferable.

The top sheet 21 can be formed from a nonwoven fabric, a film having a liquid-permeable opening, a net sheet, or the like, and the liquid-impermeable sheet 23 can be formed from a plastic sheet such as a polyethylene sheet. An exterior nonwoven fabric 24 such as a water-repellent nonwoven fabric is bonded to the outer surface of the liquid-impermeable sheet 23, and the exterior nonwoven fabric 24 serves as a connecting portion of the waistline portion 10 in the illustrated form. The exterior nonwoven fabric 24 preferably has a basis weight of 15 to 50 g / m ² from the viewpoint of exhibiting sufficient engagement force, and suitable types include air-through nonwoven fabric, point bond nonwoven fabric, spunbond nonwoven fabric, and SMS nonwoven fabric. It is. In this case, at least a connection portion (for example, a portion on the front side from the center in the front-rear direction, etc., which may be the whole) in the exterior nonwoven fabric 24 can be embossed and reinforced. Reference numeral 25 in the figure indicates a recess formed by embossing. In the embossing process, the exterior nonwoven fabric 24 and the liquid-impermeable sheet 23 are bonded together, and then pressed from the exterior nonwoven fabric 24 side with a convex emboss roll. The roll opposed to the convex embossing roll may be a concave embossing roll in which a concave portion corresponding to the convex portion of the convex embossing roll is formed, or a rubber roll having flexibility enough to push the convex portion of the convex embossing roll. There is no particular limitation. The embossed area which is the adhesion point area of the convex part of the convex embossing roll is 5 to 50%, preferably 5 to 40%, and particularly preferably 10 to 30%. If the embossed area is less than 5%, the adhesive strength is insufficient, and if it is more than 50%, the sheet obtained by embossing may become hard and the texture may be impaired. As an emboss pattern to be provided as a connecting portion, any pattern such as a dot shape, a staggered shape, a lattice shape, or a linear shape can be selected.
Regardless of whether or not the exterior is a non-woven fabric, a target tape 26 on which a large number of loops with hooks are formed can be separately provided on the sheet surface, and this can be used as a connecting portion. The target tape 26 is preferably provided on a part of the front side of the center in the front-rear direction, for example, but may be provided over the whole.

As the absorbent body 22, there can be used, for example, a fiber made of aggregates of filaments in addition to a fiber bundle of short fibers such as cotton-like pulp. The aggregate of filaments can be formed by opening a tow (fiber bundle) such as cellulose acetate. The absorbent body 22 may contain a superabsorbent polymer (SAP) as necessary, or may be wrapped with crepe paper or nonwoven fabric.
Further, barrier cuffs 30, 30 that stand up with respect to the top sheet 21 at the time of wearing are provided on both sides in the width direction of the absorbent main body 20. More specifically, the edge 31a on the outer side in the width direction of the belt-like barrier sheet 31 is fixed to the surface of the top sheet 21 by hot-melt bonding or the like over the entire longitudinal direction on both sides of the absorbent main body 20, and the width direction center side The portion 31b is fixed to the surface of the top sheet 21 by hot-melt bonding or the like at the front and rear end portions of the absorbent main body 20, and is not fixed at the middle portion in the longitudinal direction. Further, the non-fixed portion 31b has a double structure by folding back and sticking the distal end portion to the proximal end portion. Between the sheets of the double structure portion, an elongated elastic elastic member 32 such as thread rubber is provided. Is clamped and fixed along the longitudinal direction in the stretched state. At the time of use, the non-fixed portion 31b of the barrier sheet 31 is erected away from the top sheet 21 by the contraction force of the elastic elastic member 32, and the tip portion thereof is in close contact with the wearer's leg. As a result, excrement moving in the lateral direction along the top sheet 21 is blocked, and side leakage is prevented. As the barrier sheet 31, a water-repellent nonwoven fabric can be suitably used.

The waistline portion 10 is a belt-like member that is a portion from a waist opening through which the wearer's torso is passed to a leg opening through which the wearer's leg is passed. The waistline portion 10 includes an intermediate portion 10c corresponding to the absorbent main body 20 in the product width direction, and first and second side flap portions 11 and 12 projecting on both sides thereof. Reference numeral 12 has base end side stretchable parts 11x, 12x and distal end side fastening parts 11f, 12f. The stretchable portions 11x and 12x are portions that provide stretchability in the waistline direction on both sides of the product, and the fastening portions 11f and 12f are portions that are connected when assembled into a pants type. Each side flap portion 11, 12 can cover a wide range from the abdomen to the buttocks of the wearer's waist when the vertical dimension is 1/5 or more of the total length of the disposable diaper, particularly 1/4 or more. Excellent fit around the waist. However, since the undercarriage becomes tight, it is desirable not to make it more than 1/3. In addition, when the shape of a side flap part is a taper shape etc. and an up-down direction dimension is not uniform, it is based on the up-down direction dimension in the center of the width direction of a side flap part. Further, the side flap portions 11 and 12 are preferably 1.5 to 4 times, particularly 2 to 3 times that when contracted, and the width direction dimension when expanding is 1 to 1 of the intermediate portion 10c. It is preferable that the ratio is about 3 times, particularly about 1.5 to 2.5 times because the dimensions of the waistline can be easily adjusted.
More specifically, as can be understood from the cross-sectional views of FIGS. 6 to 9, the waistline portion 10 is based on the main body sheet 13 over its entirety, and each portion has a function by adding members. More specifically, the main body sheet 13 is formed by stacking a plurality of nonwoven fabrics 13a and 13b and fixed by a hot-melt adhesive or the like, and between the nonwoven fabrics 13a and 13b, an intermediate portion 10c and a stretchable portion of the waistline portion. The elastic elastic member 14 is sandwiched and fixed in a stretched state along the width direction (trunk direction) over 11x and 12x.

Particularly in the waistline portion of the illustrated embodiment, in the waist portion W that is defined as the vertical range from the upper end edge (being the edge of the waist opening) to the vicinity of the upper end of the absorbent main body 20, the middle portion 10c of the waistline portion and the stretchable portion 11x, While the elastic elastic member 14 is continuously provided over the entire 12x waistline direction, the elastic elastic member 14 is formed of the absorbent main body 20 in the lower waist U that is defined as a lower portion than the waist portion W. Except for the width direction intermediate portion 10c that overlaps with each other, the elastic force is provided only on both sides thereof. In the form in which the elastic force acts only on both sides, in addition to the form in which the elastic elastic member 14 exists only on both sides, the elastic elastic member 14 extends over the whole waist direction of the middle part 10c of the waist part 10 and the stretch parts 11x and 12x. Although it exists, the elastic part 14 is cut | disconnected in the intermediate part 10c, and the structure comprised so that a stretching force does not act is also contained. The area where the elastic elastic member 14 is disposed need not exactly match the outline of the absorbent main body 20, and if it is in the vicinity, the elastic elastic member 14 is separated even if it overlaps the absorbent main body 20. It doesn't matter.
The elastic elastic member 14 may be a thread rubber or elastic foam band, a film-like elastic body, a net-like elastic body, or the like, but a plurality of thread rubbers are provided in parallel along the waist direction. Is preferred. Specifically, thread rubber having a thickness of 300 to 1200 dtex, preferably about 400 to 1000 dtex, about 5 to 7 at intervals of 4 to 6 mm in the waist W, and 10 to 10 at intervals of 3 to 8 mm in the lower waist. It is preferable to fix at about 30 to about 30, respectively at an elongation of 150 to 400%, preferably about 200 to 300%.

In the fastening portions 11f and 12f in the first and second side flap portions 11 and 12, as shown in FIG. 1, FIG. 7 and FIG. A hook tape (male material of a mechanical fastener) 15 in which a large number of hook-like projections such as are arranged in the vertical direction is substantially the entire vertical direction, specifically, the vertical dimension of the side flap portions 11 and 12 is 4/5 or more of the vertical dimension. It is preferably attached by hot melt bonding or the like over the entire vertical direction. For example, when the vertical size of the side flap portions 11 and 12 is not uniform due to, for example, a tapered shape, the above ratio is based on the vertical size at the center in the width direction of the side flap portions 11 and 12. To do.
Characteristically, in each of the side flap portions 11 and 12, a perforation 16 extending from the middle in the vertical direction of the tip edge toward the middle portion 10c along the product width direction (the waistline direction) is formed. The perforation 16 in the illustrated example extends only to the middle in the width direction of the expandable portions 11x and 12x, but can be extended to the boundary with the intermediate portion 10c. In addition, the vertical position of the perforation 16 is the center in the vertical direction in the illustrated example, but is not limited thereto. For example, the perforation 16 may be provided along the boundary between the waist portion W and the lower waist U.

In the present embodiment, the form of one perforation 16 is described. However, the form having a plurality of perforations 16 is not excluded at all. In the case of the form having a plurality of perforations 16, In addition, further free size adjustment becomes possible. When a plurality of perforations are provided, all the perforation forms (perforation width, perforation pitch, etc.) may be the same perforation form or different perforation forms. May be.
As one preferred form, in the state where the perforation 16 is cut off, the stretch stress in the product width direction of the portion corresponding to the upper side of the perforation 16 is different from the stretch stress in the product width direction of the portion corresponding to the lower side of the perforation. It is also proposed. For example, the stretching stress in the product width direction of the portion corresponding to the upper side of the perforation 16 can be made larger than that of the portion corresponding to the lower side of the perforation 16. More specifically, the expansion stress in the product width direction of the portion corresponding to the upper side of the perforation 16 is set to about 1.5 to 2.5 times the expansion stress in the product width direction of the portion corresponding to the lower side of the perforation 16. Can do. The definition of the stretching stress is as described above. In order to make the expansion and contraction stress large and small, the number, thickness, extension rate, and the like of the elastic expansion and contraction members may be made different between the upper side and the lower side of the perforation 16.

  Moreover, in this embodiment, the lower edge part of each side flap part 11 and 12 has comprised the curve shape which a direction changes gradually to the crotch side as it approaches the absorptive main body 20 in the vicinity of the absorptive main body 20. . Thereby, the intersection vicinity of the lower edge part of each side flap part 11 and 12 and the side edge of the absorptive main body 20 comes to fit a wearer's leg periphery. Further, along the curved portions of the side flap portions 11 and 12, the elongated elastic elastic member 17 such as rubber thread is fixed in an extended state, and the top sheet 21 on both sides of the absorbent main body 20 is not liquid-tight. A portion that forms at least the edge of the leg opening LO along the front-rear direction with the permeable sheet 23, that is, a rear body portion of the waistline portion 10 from a crossing position with a front body portion of the waistline portion 10 in the illustrated embodiment. An elongated elastic elastic member 27 such as rubber thread is fixed in an extended state at a portion up to the crossing position. Thereby, the whole edge part of leg opening part LO comes to expand-contract in the leg periphery direction.

  The form of the hook tape 15 can be determined as appropriate, and is directly attached to the inner surface of the main body sheet 13 constituting the first and second side flap portions 11 and 12 as in the examples shown in FIGS. However, as shown in some examples in FIG. 13, the hook tape 15 is attached to the intermediate portion in the width direction on the base sheet 15 b, and the engagement surface of the hook tape 15 faces the inner surface of the main body sheet 13. (Overlapping), the outer side edge (the portion without the hook tape 15) in the width direction of the base sheet 15b is bonded and fixed to the side edge of the side flap portions 11 and 12 by a bonding line 15m by adhesion or welding. Is preferred. (Welding is more preferable because higher strength can be obtained.) With such a configuration, a portion without the hook tape 92 located at the end of the base sheet 91 opposite to the joining line 92m side is picked. As a part, the base sheet 15b and the hook tape 15 are deployed from the side edges of the side flap parts 11 and 12 outward in the width direction, and are fixed as shown by arrows and two-dot chain lines in FIG. Therefore, a region where the elastic force of the elastic elastic member 14 does not work is provided in a portion corresponding to the fastening portion or the knob portion of the side flap portions 11 and 12 as in the example shown in FIGS. In addition, if the inner surface of the main body sheet 13 is made of a non-woven fabric that can be engaged with the hook tape 15, the hook tape 15 may be exposed to the outer surface during manufacture or storage by temporarily engaging with the engagement. Not like Is possible, separately or provided with a so-called release tape for temporary fixing, there is no need or temporarily fixed by an adhesive to be.

The hook tape 15 shown in FIG. 13A has a rectangular shape and is attached to the side flaps 11 and 12 of the waistline portion 10 in a state of being attached to the intermediate portion in the width direction on the base sheet 15b. It is what. Although the raw material of the base material sheet 15b is not specifically limited, The spun bond nonwoven fabric and the point bond nonwoven fabric whose basic weight is about 50-100 g / m < ² > are suitable.
On the other hand, in the hook tape 15 shown in FIG. 13B, the side edge 15w on one side in the waistline direction has both the longitudinal end portions, the central portion, and the upper and lower intermediate portions located therebetween. Among them, it is formed in a wave shape so as to have a portion where the width in the waistline direction is maximum at both ends and the central portion, and a portion where the width in the waistline direction is minimum at the upper intermediate portion and the lower intermediate portion. The side edge 15s on the other side of the direction forms a straight line along the vertical direction. In this example, the area of the hook tape 15 is widened at both the longitudinal end portions and the center portion where the force is particularly likely to be applied, and the upper intermediate portion and the lower intermediate portion are narrowed. The flexibility of 11 and 12 is hard to be impaired. In addition, the amount of expensive hook tape used can be reduced. Furthermore, since there is a portion where the base tape 15b is exposed without the hook tape 15 on the front end side of the side flap portions 11 and 12, this portion can be used as a handle.
The hook tape 15 shown in FIG. 13 (c) is affixed to the side flap portions 11 and 12 of the waistline portion 10 in a state of being affixed intermittently in the vertical direction on the base sheet 15b. It is a form which is more excellent in flexibility and breathability. In addition, hook tapes 15 are respectively provided at both longitudinal ends where force is particularly easily applied, and each hook tape 15 becomes wider toward the tip side (the knob portion side), so that the fastening force is not easily lost. In this example, the hook tape 15 is not provided over substantially the entire vertical direction of the side flap portions 11 and 12, but the hook tape 15 is provided at least at the upper and lower end portions and is divided into a plurality of portions. If the total length of the hook tape in the vertical direction (for the taper shape as shown in the figure, the longest total) is more than ½ of the vertical length of the side flaps 11 and 12, sufficient stop Attaching power is obtained. Rather, since the area of the middle portion in the vertical direction can be omitted, the flexibility of the side flap portions 11 and 12 is further unlikely to be impaired, and the amount of expensive hook tape used can be suppressed.
The hook tape 15 shown in FIG. 13D is obtained by changing the wavy side edge 15w into a step shape. In this example, the area of the hook tape 15 is widened at both longitudinal end portions where force is particularly easily applied, and the area of the longitudinal intermediate portion is narrowed. Therefore, the flexibility can be improved without impairing the fastening force, and the cost is high. The amount of hook tape used can be reduced. In addition, since there is a portion where the base tape 15b is exposed without the hook tape 15 in the longitudinal intermediate portion on the distal end side of the side flap portions 11 and 12, this portion can be used as a wide grip allowance, so that it is fastened. Cheap. In addition to this, the shape of the wavy side edge 15w of the hook tape 15 can be an appropriate shape such as a triangular wave shape or a rectangular wave shape. However, a shape having periodicity is particularly preferable because the manufacturing becomes easy. As can be seen from the comparison between the configuration shown in FIG. 13 (d) and the configuration shown in FIG. 13 (b), the wavy side edge 15w is located on the tip side of the side flap portions 11 and 12. The linear side edge 15s may be positioned on the intermediate portion 10c side or may be positioned on the opposite side.

On the other hand, a disposable diaper that can be used as either a pants-type or a fixed-type constructed in this way can be assembled as follows, and is not only used for connecting each part applied to the body in the unfolded state, but also pre-formed in a pants-type It is also possible to use it through both feet.
That is, in the former method of use, after the center of the absorbent body 20 in the waistline in the width direction is aligned with the center in the left-right direction of the back waist, for example, as shown in FIG. Bring the front part to the ventral side, and bring the first side flap 11 and the second side flap 12 onto it as shown in FIGS. 11 and 12, and engage the male members 15 and 16 on the inner surface with the outer surface of the absorbent main body 20 To do. As a result, the waistline portion 10 is wound around the waistline, and the crotch portion and both front and rear sides thereof are covered by the absorbent main body 20, and the mounting is completed.
This is basically the same for the method of using the pants shape in advance. That is, as shown in FIG. 10, first, the front portion of the absorbent main body 20 is brought to the ventral side, and the first side flap 11 and the second side flap 12 are placed thereon as shown in FIGS. Bring in and engage the male members 15 and 16 on the inner surface with the outer surface of the absorbent main body 20. As a result, an annular waistline and waist opening WO are formed, and leg openings LO are formed on both sides of the lower portion of the absorbent main body 20. The wearer wears both legs through the torso opening WO to both leg openings LO.
Characteristically, in these modes of use, the side flaps 11 and 12 can be divided into two upper and lower sides by separating (splitting) the perforations 16 as necessary. It can be connected to the place. Moreover, as shown in FIG. 12, the parts 11u, 11b, 12u, 12b divided into the upper and lower stages can be connected to the absorbent main body 20 at different angles. In particular, the upper portions 11u and 12u of the portions divided into two upper and lower stages as shown in the figure are connected to the front end portion of the absorbent main body 20 along the width direction, while the lower portions 11b and 12b are connected to the crotch side. If it connects diagonally toward the site | part close | similar to, since the absorptive main body 20 can be lifted along a buttocks and it can be made to fit a body, it is preferable.

(Other)
(A) The male and female (hook tape and non-woven fabric or target tape) of the mechanical fastener in the above example are provided oppositely, that is, the female material is provided in the portion where the male material is provided, and the male material is provided in the portion where the female material is provided. be able to.
(B) In the above example, the mechanical fastener is used as the connecting means for the fastening portion, but other means such as an adhesive layer can be used instead. When an adhesive is used, an adhesive layer is provided at the fastening portion and nothing is provided at the connecting portion. However, it is preferable to provide a resin film that adheres so that the adhesive can be peeled off and reattached. For example, a mode in which an adhesive material layer is provided at the fastening portion of the waistline portion 10 and a resin film subjected to a peeling treatment is fixed to the outer surface of the absorbent main body 20 is preferable.
(C) Contrary to the above example, the front end portion of the absorbent main body 20 is fixed to the inner surface of the intermediate portion 10c of the waistline portion 10 by hot melt bonding or the like, and the waistline around the outer surface of the rear portion of the absorbent body 20 It can also comprise so that a part may be connected so that attachment or detachment is possible.

<Embodiment of Forming Method of Girth>
(First form)
In order to improve the material yield by so-called trimless when manufacturing the waistline portion 10 in the above-mentioned paper diaper, as shown in FIG. 14, the upper and lower central portions 18a protrude outward in the product width direction on both the upper and lower sides of the perforation 16, respectively. In addition, it is also preferable that each projecting portion 18a and a portion 18b between adjacent projecting portions 18a have point symmetry. As a result, as shown in the figure, it can be manufactured by a so-called trimless. Specifically, a main body sheet original fabric 130 that is double the width of the waistline portion 10 and is continuous in the product longitudinal direction is manufactured in advance, the main body sheet original fabric 130 is fed out, and the hook tape 15 is continuously bonded to the center position. Then, the hook tape 15 is cut by a wavy periodic curve 19a alternately traversing in the CD direction and continuing in the MD direction, and a cutting line 19b for dividing each waistline portion 10 is provided, and each waistline portion 10 is cut. The perforation 16 is put in a predetermined position.

(Second form)
The second form is shown in FIGS. 15 and 16, and is a form suitable for continuously producing the waistline portion 10 in the production line. That is, as shown in FIG. 15, the belt-like hook tape 15 continuous with a predetermined width is fed out and conveyed, and the hook tape 15 is displaced in the width direction in the continuous direction (conveying direction (MD direction)). A pair of divided tapes 15 and 15 are formed in which a wavy cutting line C1 extending along the line is mirror-symmetrically divided into two, and one side edge 15s is linear and the other side edge 15w is wavy.
The wavy cutting line C1 can be determined as appropriate, but preferably has periodicity, and has periodicity in the continuous direction of the hook tape 15 as in the illustrated example, and the start point, end point, and half-cycle point of the cycle. On the center line of the hook tape 15 in the CD direction (transverse direction orthogonal to the transport direction), and the first half from the start point to the half cycle point and the second half from the half cycle point to the end point are point-symmetric about the half cycle point The first half and the second half are preferably symmetrical with respect to a line along the width direction passing through each half of the periodic points. Specific examples of shapes include those described above, ie, periodic curves such as sine curves, triangle waves, rectangular waves, alternating large and small waves, and step changes in waves. Can be mentioned.

Next, the continuous belt-like base sheet 15b is fed out and transported, and a pair of divided tapes 15 and 15 separately formed on both sides in the CD direction on the base sheet 15b are provided with wavy side edges 15w and 15w. Affixing sequentially in a continuous direction while facing each other with a predetermined interval. As a result, a region 15c not having the division tape 15 is formed in the center portion in the CD direction of the base sheet 15b, and a continuous hook tape region in which the division tape 15 is attached to both sides in the CD direction is formed. The wavy side edge 15w is located on the center side in the CD direction of the hook tape region, and the linear side edge 15s is located on the outer side (opposite side). Appropriate fixing means such as a hot melt adhesive can be used for attaching the dividing tape 15.
When the cutting line C1 is a periodic curve as shown in the figure, the phase of the wavy side edge 15w in one divided tape 15 and the other divided tape when the pair of divided tapes 15 and 15 are attached to the base sheet 15b. By matching the phase of the wavy side edge 15w at 15 with respect to the center in the CD direction, line symmetry is achieved.
The base sheet 15b to which the divided tapes 15 and 15 are attached is then cut at a predetermined interval d1 in the MD direction to form an individual fastening portion forming sheet 150. Further, along with this cutting, the perforation 16 described above may be formed along the CD direction at a predetermined position within the cutting interval d1. This cutting interval d1 is the same as the longitudinal length of the hook tape 15 in the product. In particular, in the case of the illustrated embodiment, the cutting interval d1 and the period of the wavy side edge 15w are such that a plurality (or one) of the top and bottom of the wavy side edge 15w of the dividing tape 15 remain on each fastening part forming sheet. Is set. The fastening portion forming sheet 150 formed in this way is obtained by attaching the hook tape 15 to both sides of the region 15c not having the hook tape 15 in the central portion in the CD direction.

  Subsequently, the fastening portion forming sheet 150 is turned 90 degrees so that the longitudinal direction of the product is orthogonal to the conveying direction, and then the surface having the hook tape 15 and the main body sheet 13 as shown in FIG. It is intermittently disposed on the continuous belt-like main body sheet 13 that is sequentially conveyed so as to face each other, and is attached with a hot melt adhesive or the like. The continuous belt-like main body sheet 13 has a portion that becomes a waistline portion in the longitudinal direction repeatedly, and the waistline direction and the longitudinal direction coincide with each other. In addition, when fixing with the joining line 15m by welding like the after-mentioned, what is necessary is just to temporarily fix so that the fixation part formation sheet 150 may not fall from the main body sheet | seat 13 at this stage. An adhesive or the like may be used for temporary fixing. However, if the main body sheet 13 is a non-woven fabric, it can be temporarily fixed only by the engaging force of the hook tape 15. When the fastening part forming sheet 150 is attached, the center of the fastening part forming sheet 150 in the conveyance direction is aligned with the boundary 13 d of the waistline part adjacent to the conveyance direction of the main body sheet 13. The continuous strip-shaped main body sheet 13 is sandwiched between two sheets while an elastic elastic member 14 such as rubber thread is stretched along the conveying direction (circumference direction) while conveying two continuous sheets. It can form continuously by pasting together by the etc., and the fixation part formation sheet 150 can be affixed on it with the conveyance state.

  Thereafter, the main body sheet 13 and the fastening portion forming sheet 150 are integrally cut at a predetermined interval in the transport direction along the boundary 13d of the portion that becomes the waistline portion, and the individual waistline portions 10 are formed. This waist part 10 has the same structure as the waist part 10 shown in FIG. By this cutting, the fastening portion forming sheet 150 is cut in the conveyance direction central region 15c not having the hook tape 15, and the hook tapes 15 and 15 on both sides of the region 15c are separated in the waist direction of the waist portion 10 in which the hook tapes 15 and 15 are individualized. It is arranged at each end. In addition, like the form of illustration, prior to cutting of the fastening part forming sheet 150, a linear shape along the vertical direction is formed by heat sealing or ultrasonic sealing on both sides of the cutting position in the MD direction (the product waistline direction). Providing the joining line 15m is preferable because not only the hook tape 15 but also the constituent sheets 13a and 13b and the elastic elastic member 14 of the main body sheet 13 are firmly fixed. Further, it is preferable that the perforation 16 is also integrally formed before the fastening portion forming sheet 150 is fixed (or temporarily fixed) to the main body sheet 13 and before cutting.

(Third form)
FIG. 17 shows an embodiment for forming the waistline portion 10 shown in FIG. In this embodiment, the belt-like hook tape 15 continuous with a predetermined width is fed out and conveyed, and the continuous belt-like holding sheets 15r and 15r are hooked to the hook tape 15 so as to protrude from both side edges of the hook tape 15 in the CD direction. Sequentially pasted by overlap hot melt bonding or heat fusion. The holding sheet 15r is preferably individually attached to each side of the hook tape 15 as shown in the figure, but a continuous belt-like sheet having a width wider than that of the hook tape 15 may be attached to the center. The holding sheet 15r can be selected from the same material as the base sheet 15b.
Thereafter, with respect to the hook tape 15 to which the holding sheet 15r is stuck, the width direction of the holding tape 15r only swings from the one holding sheet 15r only part to the other holding sheet 15r only, along the continuous direction (conveying direction). A pair of split tapes 160, 160 are formed in which the wavy cutting line C2 extends in a mirror image symmetry, and one side edge 160s forms a straight line and the other side edge 160w forms a wave. Unlike the second embodiment, in the divided tape 160, the hook tape 15 becomes intermittent in the MD direction (product longitudinal direction) by cutting along the wavy cutting line C2.
Next, the continuous belt-like substrate sheet 15b is fed out and conveyed, and a pair of separately formed divided tapes 160 and 160 are formed on both sides in the CD direction on the substrate sheet 15b, and the wavy side edges 160w and 160w are formed on each other. Affixing sequentially in a continuous direction while facing each other with a predetermined interval. At this time, as shown in the figure, if the width is so narrow that both side edges of the base sheet 15b are located between the top and bottom of the wavy side edge 160w, the base sheet 15b, the dividing tape 1560, and the holding sheet 15r Since the through hole 160p is opened between the two, the air permeability and flexibility are particularly excellent. In addition, if the width of the both sides of the base sheet 15b is wide enough to cover the entire wavy side edge 15, the through hole 160p is not formed between the base sheet 15b, the split tape 15 and the holding sheet, so that the rigidity is increased. The shape stability is increased by increasing the height. This relationship is the same in the second embodiment. In any case, as in the second embodiment, a region 15c not having the dividing tape 15 is formed in the center portion of the base sheet 15b in the CD direction, and the dividing tape 15 is continuously attached to both sides in the CD direction. A hook tape region is formed, and the wavy side edge 160w of the split tape 160 is located on the center side in the CD direction of the hook tape region, and the linear side edge 160s is located on the opposite side. Similarly to the second embodiment, when the cutting line C1 is a periodic curve as shown in the figure, when the pair of divided tapes 160, 160 are attached onto the base sheet 15b, the wavy side of one divided tape 160 By matching the phase of the edge 160w with the phase of the wavy side edge 160w in the other divided tape 160, the line 160 becomes line symmetric with respect to the center in the CD direction.
Thereafter, it is the same as in the second embodiment (from the formation of the fastening portion forming sheet 150 by cutting to the attachment to the main body sheet 13, the cutting of the main body sheath 13 and the like are all the same), and the obtained waist portion is also the same Since it is the same as that shown in FIG.

(Other)
In the second and third embodiments, the hook tape 15 slits are made straight instead of corrugated (or two hook tapes 15 cut in advance to a predetermined width may be supplied in parallel). A structure similar to that of the waistline portion 10 shown in FIG. In this case, the hook tape 15 can be directly attached to the main body sheet 13 without using the base sheet 15b. When manufacturing a disposable diaper, it is preferable that the absorbent main body 20 is attached to the main body sheet 13 before the waistline portion 10 is individually cut.
In the second embodiment, after the hook tape 15 is slit in a wave shape, the left and right sides of the formed pair of divided tapes 15 and 15 are exchanged, and the linear side edges 15s and 15s are opposed to each other with a predetermined interval. In addition, the same structure as that of the waistline portion 10 shown in FIG. 13D can be formed by sticking the base material sheet 15b with the continuous direction aligned.
In addition, when the hook tape 15 is a material that is easily stretched, in the form in which the hook tape 15 is slit in a wave shape, when the amplitude of the wavy side edges of the divided tapes 15 and 160 is large (for example, (the maximum width of the divided tape, that is, The width of the tape at the top of the wavy side edge 160w−the minimum width of the tape after division, that is, the tape width at the bottom of the wavy side edge 160w) / the maximum width of the divided tape ≧ 0.5) The elongation is preferably 5% or less, more preferably 3% or less under a tension of 2 kgf / 25 mm. When the hook tape 15 made of an easily stretchable material having an elongation rate of 5% or more is used, the hook tape 15 is curled and attached in the conveying process until the hook tape 15 slit in a wavy shape is fixed to the base sheet 15b. May cause inconvenience. Although the curling can be prevented by providing a holding sheet as in the third embodiment, in this case, the elongation of the holding sheet is preferably 5% or less, particularly 3% or less under a tension of 2 kgf / 25 mm. .

  INDUSTRIAL APPLICABILITY The present invention can be applied to the formation of a disposable diaper and a stretchable waist part having a fastening part in the manufacture thereof.

It is an inner surface side top view of the deployment state of the paper diaper which can be used also as a pants type and a fastening type. It is an outer surface side top view of the unfolded state of the paper diaper which can be used as a pants type or a fixed type. FIG. 3 is a 3-3 cross-sectional view of FIG. 1. FIG. 4 is a sectional view taken along the line 4-4 in FIG. 1. FIG. 5 is a sectional view taken along line 5-5 in FIG. 1. FIG. 6 is a sectional view taken along line 6-6 in FIG. It is 7-7 sectional drawing of FIG. It is 8-8 sectional drawing of FIG. It is 9-9 sectional drawing of FIG. It is a front view in the middle of an assembly. It is a front view of the wearing state or underpants state of a paper diaper. It is a front view of the wearing state or pants state of another paper diaper. It is a principal part enlarged plan view which shows the various forms of a fixation part. It is a top view which shows the manufacture point of a waist part. It is a top view which shows the manufacture point of a waist part. It is a top view which shows the manufacture point of a waist part. It is a top view which shows the manufacture point of a waist part.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Girth part, 14 ... Elastic elastic member, 15 ... Male material, 16 ... Perforation, 17 ... Elastic elastic member, 20 ... Absorbent main body, 21 ... Top sheet, 22 ... Absorber, 23 ... Liquid-impermeable sheet, 24 ... Nonwoven fabric, 25 ... Embossed recess, 26 ... Target tape, 27 ... Elastic elastic member.

Claims (8)

A belt-like waistline portion wound around a wearer's waistline having an intermediate portion and stretchable side flap portions projecting on both sides thereof;
One end of the front-rear direction is connected to the middle part of the waistline part, and the absorbent main body is mounted so as to cover from the back side through the crotch part to the abdomen side,
Fastening portions respectively provided on the inner surfaces of both side flap portions in the waistline portion,
A connecting portion provided on the outer surface of the front end portion of the absorbent main body,
Fastening portions on the inner surfaces of both side flap portions are disposable diapers configured to be detachably connected to the connecting portion of the outer surface of the absorbent main body,
The stretchable side flap portion has a vertical dimension that is 1/5 or more of the total length of the disposable diaper. The stretch stress in the product width direction of the upper portion and the stretch stress in the product width direction of the lower portion are Configured differently,
Paper diapers characterized by that.   The disposable diaper according to claim 1, wherein each of the stretchable side flap portions is provided with a perforation extending from the middle in the vertical direction of the tip edge toward the middle portion along the product width direction.   The disposable diaper according to claim 2, wherein the perforation is provided on a boundary line having different stretching stresses in each of the stretchable side flap portions.   The fastening portions of the both side flap portions are provided by a hook tape having a large number of hook-shaped protrusions on the surface, and the connecting portion of the absorbent main body is a non-woven fabric that forms the outer surface of the absorbent main body, The disposable diaper according to any one of claims 1 to 3, wherein the detachable connection is performed by engaging a hook tape on an inner surface of the flap portion with a nonwoven fabric on the outer surface of the absorbent main body.   The paper diaper of Claim 4 with which the embossing is provided to the nonwoven fabric of the said absorptive main body outer surface.   The fastening portions of the side flap portions are formed by hook tape having a large number of hook-shaped protrusions on the surface, and the fastening portions have a vertical dimension that is 4/5 or more of the side flap portions. The fastening portion has a linear shape in which a side edge on one side in the waistline direction extends along the longitudinal direction perpendicular to the waistline direction, and a side edge on the other side in the waistline direction extends in the longitudinal direction while being displaced in the waistline direction. The disposable diaper according to any one of claims 1 to 5, wherein the disposable diaper has an existing wavy shape.   The fastening portions of the side flap portions are formed by hook tape having a large number of hook-shaped protrusions on the surface, and the fastening portions have a vertical dimension that is 4/5 or more of the side flap portions. The paper diaper according to any one of claims 1 to 5, wherein the fastening portion is provided intermittently in a longitudinal direction orthogonal to the waistline direction and provided at least at the upper and lower end portions of the side flap portion. A belt-like waistline portion wound around a wearer's waistline having an intermediate portion and stretchable side flap portions projecting on both sides thereof;
One end of the front-rear direction is connected to the middle part of the waistline part, and the absorbent main body is mounted so as to cover from the back side through the crotch part to the abdomen side,
Fastening portions respectively provided on the inner surfaces of both side flap portions in the waistline portion,
A connecting portion provided on the outer surface of the front end portion of the absorbent main body,
When manufacturing the disposable diaper configured such that the fastening portions of the inner surfaces of both side flap portions are detachably connected to the connecting portion of the outer surface of the absorbent main body, the waist portion is formed.
While conveying the continuous belt-like base material sheet along the continuous direction, a pair of continuous hook tapes are spaced at predetermined intervals on both sides of the continuous belt-like base material sheet in the transverse direction. Individually fastened having a hook tape on both sides in the transverse direction and an area without a hook tape between them by cutting them at a predetermined interval in the conveying direction after being stuck together and sequentially Forming a part forming sheet,
Turn the conveying direction of this fastening part forming sheet 90 degrees,
Adjacent to the conveying direction of the continuous belt-shaped main body sheet while the continuous belt-shaped main body sheet having a portion that becomes the waistline portion is repeated in the longitudinal direction and the waistline direction and the longitudinal direction coincide with each other along the continuous direction The fastening part forming sheets were sequentially pasted so as to straddle the boundary of the waistline part to be positioned, and to locate the boundary in a region not having the hook tape, and to position the hook tape on both sides of the boundary. Thereafter, the main body sheet is sequentially cut together with the fastening portion forming sheet at the boundary.
A method for forming a stretchable waistline portion having a fastening portion in the manufacture of a paper diaper.

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