JP2009201849A - Tape type disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tape type disposable diaper having a fastening tape capable of securing strength and rigidity and preventing tears and breakage even while securing flexibility and stretchability. <P>SOLUTION: The fastening tape 5 has a fixed part 5f fixed to the side flap part SF of a back side part and a projection part 5e projected from the back side part, and the projection part 5e has a distal end part 5p provided with a connection part 9 and a main body part 5b more on the proximal end side than the distal end part 5p. The fastening tape 5 has a basic nonwoven fabric layer 51 over the fixed part 5f, the main body part 5b and the distal end part 5p, and a thin and long elastic member 20 is fixed in a stretched state by a hot melt adhesive so as to form a triangular wave shape crossing the main body part 5b and extending in the vertical direction of the fastening tape 5 while moving back and forth between the fixed part 5f and the distal end part 5p. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a tape-type disposable diaper.

In the tape-type disposable diaper, a fastening tape that is detachably connected to the other part is protruded from both sides in the width direction of the back part (see, for example, Patent Documents 1 and 2). The fastening tape has a fixing portion with respect to the back side portion and a protruding portion protruding from the back side portion, and this protruding portion is a tip portion provided with a connecting portion such as a hook tape for bonding or an adhesive layer. And a main body portion on the proximal end side with respect to the distal end portion. In recent years, it has been proposed to increase the elasticity along the width direction by fixing the rubber thread to the fastening tape in a stretched state along the width direction in order to give elasticity to the waistline and improve the fit to the body. ing.
JP 2005-160506 A Japanese Patent No. 3737725

However, in the conventional elastic fastening tape, since the contraction force acts only along the width direction, an appropriate contraction force is not necessarily exhibited for various states caused by the movement of the legs and the movement of the trunk, There were gaps around the legs and torso, which could lead to leakage.
Then, the main subject of this invention is providing the tape-type disposable diaper which exhibits the more excellent fitting property with respect to the various states which generate | occur | produce by movement of a leg or a trunk | drum.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
Fastening tape that has a ventral part and a dorsal part, and is detachably connected to the other part from both sides in the width direction of at least one of the ventral part and the dorsal part, respectively. In a tape-type disposable diaper,
The fastening tape has a fixed portion fixed to the one portion and a protruding portion that protrudes from the fixed portion and is not fixed to the one portion. The protruding portion is a connecting portion for the connection. And a main body portion closer to the base end side than the front end portion,
The main body portion of the fastening tape has a first portion and a second portion located on the crotch side from the first portion,
The elongated elastic member is fixed to the first portion in a state where the elongated elastic member is stretched along the longitudinal direction along a fixing position that approaches the waist end edge side from the tip end side toward the fixing portion side. Has been
An elongated elastic member is fixed to the second portion in a state where the elongated elastic member is extended in the longitudinal direction along a fixing position that approaches the crotch side from the tip side toward the fixing portion. ,
This is a tape-type disposable diaper.

(Function and effect)
In the present invention, since the elongated elastic members are fixed to the first portion and the second portion in the stretched state, contraction force acts on both portions. Characteristically, the direction of the contraction force in both parts is not in the width direction, and in the first part, the contraction force acts along the fixed position so as to approach the waist edge side from the front end side toward the fixed part side. On the contrary, in the second portion, contraction force acts along a fixed position that approaches the crotch side as it goes from the distal end side to the fixed portion side. Therefore, in the abdominal side portion and the back side portion where the fastening portion of the fastening tape is fixed, the first portion exhibits contraction force in the direction along the leg circumference, and the second portion is the waist edge side end. It exerts a contraction force in a direction against the force in the direction in which the part is separated from the body. On the other hand, in the abdomen portion and the dorsal portion where the tip of the fastening tape is connected, the second portion exhibits a contracting force in the direction along the leg circumference, and the first portion is the waist edge side end portion. Exerts contraction force in a direction against the force in the direction away from the body. Therefore, by exhibiting the contraction force in these different directions, excellent fit is exhibited for various states generated by the movement of the legs and the movement of the trunk. For example, when the wearer takes a sitting position, a portion where the tension becomes strong or weak along the leg circumference of the diaper occurs, but in the case of the present invention, the direction of the contraction force of the elongated elastic member in the fastening tape is Since it is suitable for absorbing the tension change in the direction along the leg circumference, the fit around the leg becomes excellent.

<Invention of Claim 2>
2. The tape according to claim 1, wherein a plurality of unit structures including the first portion and the second portion located on the crotch side are arranged in parallel on the body portion of the fastening tape from the waist edge side to the crotch side. Type disposable diapers.

(Function and effect)
By adopting such a structure, the above-described effects of the present invention can be satisfactorily exhibited even on a tape having a wide vertical width (a width in a direction connecting the waist edge side and the crotch side).

<Invention of Claim 3>
The elongated elastic member is provided so as to form a triangular wave shape that extends in a vertical direction of the fastening tape while reciprocating between the fixing portion and the tip portion across the main body portion. Or the tape type disposable diaper of 2.

(Function and effect)
When the elongated elastic members are arranged in a triangular wave shape as described in this section, the stretchability of the present invention can be imparted over a wide range with a single elastic member.

<Invention of Claim 4>
The tape-type disposable diaper according to any one of claims 1 to 3, wherein the crotch side edge of the fastening tape is formed so as to approach the crotch side as it goes from the tip end side to the fixed part side. .

(Function and effect)
If the crotch side edge of the fastening tape has such a shape, the direction of the force around the leg of the diaper does not change suddenly with the fastening tape, so the fastening tape can be expanded and contracted smoothly, Fit is also high.

<Invention of Claim 5>
The tape-type disposable diaper according to any one of claims 1 to 4, wherein the elongate elastic member is fixed intermittently at a predetermined regular interval in a longitudinal direction of the elongate elastic member.

(Function and effect)
As described above, when the elongated elastic member is intermittently fixed at predetermined regular intervals in the longitudinal direction, wrinkles due to the contraction of the elastic member become regular, so that the stretchability is remarkably improved and the appearance is also good. Get better.

  As described above, according to the present invention, it is possible to provide advantages such as better fit performance in various states generated by the movement of the legs and the movement of the trunk.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
(Basic structure)
1 to 10 show an example of a tape-type disposable diaper according to the present invention. The tape-type disposable diaper includes an inner surface of a liquid-impermeable back sheet 1 having an outer sheet 12 laminated on the outer surface, and a transparent material. The absorber 3 is interposed between the liquid top sheet 2.

  As the liquid-impermeable back sheet 1, in addition to a polyethylene film or the like, a sheet having moisture permeability can be used without impairing water shielding from the viewpoint of preventing stuffiness. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. Can be used.

  The exterior sheet 12 is bonded to the outer surface of the liquid-impermeable back sheet 1 in order to improve the touch. Various nonwoven fabrics can be used as the exterior sheet 12. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.

  As the liquid-permeable top sheet 2, a perforated or non-porous nonwoven fabric or a perforated plastic sheet is used. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. Moreover, as a processing method of a nonwoven fabric, well-known methods, such as the spunlace method, the spunbond method, the SMS method, the thermal bond method, the melt blown method, the needle punch method, the air through method, the point bond method, can be used.

  As the absorbent body 3, it is possible to use a laminate of pulp fibers, an aggregate of filaments such as cellulose acetate, or a nonwoven fabric, and a mixture obtained by mixing and fixing a superabsorbent polymer as necessary. . If necessary, the absorbent body 3 can be wrapped with crepe paper (not shown). Moreover, the shape of the absorber 3 can be determined as appropriate, but in addition to the hourglass shape as illustrated, a shape that extends from the front side to the rear side of the crotch portion, such as a rectangle, is preferable.

  The liquid-impermeable back sheet 1 extends outward from the periphery of the absorber 3 and has a substantially hourglass shape. On the inner surface of the laterally extending portion of the liquid-impervious backsheet 1, a portion 4x on the outer side in the width direction of the barrier sheet 4 is attached over the entire front-rear direction, thereby forming a side flap portion SF where the absorber 3 does not exist Yes. A portion 4c on the center side in the width direction of the barrier seat 4 extends to the top sheet 2, and an elongated elastic member 4G is stretched along the front-rear direction at the end on the center side in the width direction. It is fixed with a melt adhesive or the like. As the elongated elastic member 4G and the elongated elastic members 7, 13, and 20 described later, a styrene rubber, an olefin rubber, a urethane rubber, an ester rubber, a polyurethane formed in a thread shape, a string shape, a belt shape, or the like. Commonly used materials such as polyethylene, polystyrene, styrene butadiene, silicon, and polyester can be used.

  The liquid-permeable top sheet 2 has an hourglass shape that is slightly larger than the absorbent body 3, and a portion that extends slightly outward from the side edge of the absorbent body 3 is between the barrier sheet 4 and the liquid-impermeable back sheet 1. It is interposed and adhered to the liquid-impermeable back sheet 1 side with a hot melt adhesive or the like. This adhesive portion is indicated by a dot pattern (shaded) in FIGS. As the material for the barrier sheet 4, a plastic sheet or a melt blown nonwoven fabric can be used. However, in terms of touch to the skin, a nonwoven fabric that is water-repellent treated with silicon or the like is preferably used.

  When the outer surface of the liquid-impermeable back sheet 1 is covered with a nonwoven fabric, the exterior nonwoven fabric is extended outward from the periphery of the absorber 3 in place of the liquid-impermeable back sheet 1 and the side portion of the barrier sheet 4 At the same time, the side flap portion SF in which the absorber 8 does not exist can be configured. In this case, the liquid-impermeable back sheet 1 can be formed in the same shape as the top sheet 2 without extending to the side flap portion SF.

  As shown in FIGS. 3 and 4, both barrier sheets 4, 4 are not attached to and detached from the inner surface of the article (the top sheet 2 surface and the back sheet 1 inner surface in the illustrated embodiment) in the widthwise outer portion 4 x throughout the entire front-rear direction. The portion 4c on the center side in the width direction is fixed so as not to be attached to and detached from the inner surface of the article (the surface of the top sheet 2 in the illustrated embodiment) at both ends in the front-rear direction, and between the both ends in the front-rear direction. It is not fixed to the inner surface (the top sheet 2 surface in the illustrated form). As shown in FIG. 4, the non-fixed portion is a portion that becomes a barrier portion that can stand up with respect to the inner surface of the article (the surface of the top sheet 2 in the illustrated embodiment), and the rising base end 4 b has a width in the barrier sheet 4. It is located at the boundary between the fixed portion 4x on the outer side in the direction and the inner portion 4c.

  At both ends in the front-rear direction of the disposable diaper, the liquid-impervious backsheet 1 and the liquid-permeable topsheet 2 are respectively extended from the front and rear ends of the absorbent body 3 to the front and rear sides, and the end flap portions EF without the absorbent body 3 exist. In the back end flap portion EF, a plurality of elongated elastic members 7 in the illustrated example are arranged along the width direction.

  In addition, the fastening tapes 5 and 5 are attached to the dorsal side flap portions SF so as to protrude sideways, and the front target tape 6 is attached to the abdominal side surface of the disposable diaper along the width direction. A disposable diaper is attached to the body by fastening the fastening tape 5 to the front target tape 6. More specifically, the fastening tape 5 has a fixed portion 5f fixed to the side flap SF of the back portion and a protruding portion 5e protruding outward in the width direction from the side flap portion SF. 5e has the front-end | tip part 5p and the main-body part 5b of the base end side rather than this front-end | tip part 5P. On the inner surface side (liquid permeable surface sheet 2 side) of the front end portion 5p of the fastening tape 5, a hook tape having a large number of hook-shaped protrusions on the surface as a connection portion for connection to the target tape 6 (a male material of a mechanical fastener) ) 9 and 9 are attached, and a front target tape 6 having a surface on which a hook-like protrusion is detachably hooked (a female material of a mechanical fastener) 6 is attached. The material of the outer surface of the diaper itself is used in place of the front target tape 6, or an adhesive layer is used in place of the hook tape 9, and a resin tape having a smooth adhesive surface is used as the front target tape 6. be able to.

  A plurality of elongated elastic members 13 are provided on both sides of the disposable diaper in the width direction so as to extend from the abdomen portion to the back portion. In the present embodiment, the elastic member 13 is fixed between the exterior sheet 12 and the back sheet 1 using an adhesive, but the back sheet may be provided depending on the mounting position, such as when provided only on the side flap portion SF. 1 and the barrier sheet 4 or between the back sheet 1 and the top sheet 2.

  In particular, in the present embodiment, in the side flap portion SF, a plurality (five in the illustrated example) of outer elastic members 13 extending along the constricted portion formed so as to extend around the legs, the ventral side, and the back side. A plurality of (three in the illustrated example) inner elastic members 13 having a start end and a terminal end in the side flap portion SF on the side and bulging and extending inward to a portion overlapping the absorber in the crotch portion are provided. ing.

  The outer elastic member 13 includes a back-side end converging portion 13s bundled so as to extend along the front-rear direction, and a ventral-side end converging portion 13s bundled so as to extend along the front-rear direction. , And a non-converging part in which the elastic members 13 are spaced apart from each other as an intermediate part thereof.

  The inner elastic member 13 includes a back end converging portion 13s bundled so as to extend along the front-rear direction, and a ventral end converging portion 13s bundled so as to extend along the front-rear direction. In the vicinity of the dorsal end portion converging portion 13s in the portion between the dorsal side and the ventral end converging portion 13s, the direction is changed so as to be positioned on the outer side in the width direction from the center of the diaper in the front-rear direction to the fastening tape side. In the vicinity of the ventral end portion converging portion 13s of the portion between the dorsal inclined converging portion 13t and the dorsal side and ventral end portion converging portion 13s, the center of the diaper is moved from the center in the front-rear direction to the fastening tape. The elastic member 1 as an intermediate portion between the ventral side inclined converging portion 13t extending obliquely while changing the direction so as to be positioned on the outer side in the width direction, and the dorsal side and the ventral side inclined converging portion 13t. And a non-convergent portions mutually spaced.

  The back side and ventral side end converging portions 13 s of the outer and inner elastic members 13 are provided above the legs around the side flap portions SF, and in particular, the back side end converging portion 13 s of the fastening tape 5 is provided. It is provided at a position overlapping the base end. In particular, the dorsal and ventral end converging portions 13s are preferably formed in a straight line that does not follow the front-rear direction, or a curved line such as a gentle arc, rather than a straight line extending in the front-rear direction. .

  Further, the dorsal and ventral end convergent portions 13s of the outer and inner elastic members 13 are converged as a single bundle, and a part or all of the end portions are not bonded and fixed. This is because the elastic member 13 is simultaneously cut by cutting at the front and rear edges performed at the time of manufacture, and the front and rear end portions of the elastic member 13 are contracted to be drawn between the exterior sheet 12 and the backsheet 1 and from the front and rear edges. This is to prevent it from protruding. As a result, a cylindrical passage 12r is formed between the exterior sheet 12 and the back sheet 1 as indicated by a dotted line in FIG. This passage 12r opens at the front and rear edges of the product. The other parts of the outer and inner elastic members 13 are adhesively fixed to both sheets 12 and 1 in an extended state, including the back side and ventral side inclined converging parts 13t of the inner elastic member 13.

  In the tape-type disposable diaper thus configured, the side flap portion SF exhibits elasticity not only in the leg-surrounding direction but also in the waistline direction. In particular, the inner elastic member 13 on the back side has a convergent portion extending to a portion overlapping with the base end portion of the fastening tape 5 and is fixed in an expanded state. It is possible to follow and exhibit excellent performance, and it has excellent fit.

(Characteristics of the present invention)
And characteristically, as shown in FIG. 5, the fastening tape 5 includes a basic nonwoven fabric layer 51 extending over the whole (that is, extending over the fixing portion 5 f, the main body portion 5 b and the tip portion 5 p), and a fixing portion in the basic nonwoven fabric layer 51. 5f and the reinforced nonwoven fabric layer 52 each fixed to the tip 5p. Thus, by providing the reinforcement nonwoven fabric layer 52 in the front-end | tip part 5p, the intensity | strength and rigidity in the front-end | tip part 5p can be ensured, and the softness | flexibility and elasticity in the main-body part 5b can be ensured. Moreover, as shown in FIG. 6 and FIG. 7, the reinforcing nonwoven fabric layer 52 can also be provided in the fixing portion 5f.

  The basic nonwoven fabric layer 51 and the reinforcing nonwoven fabric layer 52 in the illustrated example are formed by bonding a plurality of nonwoven fabrics NF, but can also be formed by a single nonwoven fabric NF. As this nonwoven fabric NF, known ones can be used without any particular limitation. As a raw material fiber constituting the nonwoven fabric NF, synthetic fibers such as polyethylene or polypropylene such as olefin, polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. Moreover, as a processing method of nonwoven fabric NF, well-known methods, such as the spunlace method, the spunbond method, the SMS method, the thermal bond method, the melt blown method, the needle punch method, the air through method, the point bond method, can be used. In particular, a spunbond nonwoven fabric and an SMS nonwoven fabric using olefin fibers are preferable.

The basis weight of the nonwoven fabric NF to be used can be appropriately determined, but the total basis weight of the nonwoven fabric NF in the main body portion 5b is 20 to 75 g / m ² , particularly 26 to 46 g / m ² , and the fixing portion 5f and the tip portion 5p. It is preferable that the total basis weight of the nonwoven fabric NF is 35 to 130 g / m ² , particularly 46 to 116 g / m ² . Within this range, securing of strength and rigidity at the fixing portion 5f and the tip portion 5p of the fastening tape 5 and securing of flexibility and stretchability at the main body portion 5b can be achieved in a balanced and effective manner. .

  Further, as shown in FIG. 8 and FIG. 9, it has a triangular wave shape extending in the vertical direction of the fastening tape 5 while reciprocating between the fixing portion 5f and the tip portion 5p across the main body portion 5b. As described above, the elongated elastic member 20 is fixed in a stretched state by a hot melt adhesive. Specifically, the elongated elastic member 20 extends along the longitudinal direction along a fixed position that approaches the waist end edge W side from the front end portion 5p toward the fixed portion 5f (from the lower side to the upper side in FIG. 9). The first portion A1 fixed in a linearly stretched state and the crotch side (opposite side to the waist edge side) from the distal end portion 5p side toward the fixing portion 5f side (from the lower side to the upper side in FIG. 9) The elongated elastic members 20 are alternately connected to the second portions A2 that are fixed in a state where the elongated elastic members are linearly extended along the longitudinal direction along the fixed position approaching the Is arranged. Furthermore, the linear part 20s closest to the front-rear direction center side edge (crotch side edge) of the tape-type disposable diaper in the elongated elastic member 20 is formed to be the first part A1.

The dimensions and the like of the elongated elastic member 20 may be determined as appropriate. For example, regarding the dimensions of the fastening tape 5, the height (vertical length) h is 60 to 240 mm, the width of the fixing portion 5f is 20 to 60 mm, When the width of the main body 5b is 40 to 250 mm and the width of the tip 5p is 30 to 105 mm, the thickness of the elastic member 20 is 300 to 2,500 dtex, and the elastic member 20 is folded back when arranged in a triangular wave shape. When the angle θ ₁ is set to ₁ to 30 degrees, and when arranged in a wavy shape including a linear portion and a folded portion along the width direction, the vertical interval s of the linear portion 20s is set to 2 to 30 mm, and the upper and lower sides of the fastening tape It is preferable to provide the elastic member 20 over the entire direction. In addition, the angle θ _{2 with} respect to the width direction of the linear portion 20s closest to the front-rear direction center side (crotch side) of the tape-type disposable diaper in the elongated elastic member 20 is set to 5 to 30 degrees.

  When the elongated elastic member 20 is arranged in such a wave shape, the elongated elastic member 20 straddles at least the fixing part 5f and the main body part 5b and straddles the main body part 5b and the tip part 5p. Since the elongated elastic member 20 extends along a direction intersecting the vertical direction, the elongated elastic member 20 is not only a reinforcing member that connects the boundaries between the fixing portion 5f and the tip portion 5p and the main body portion 5b, but also a force applied to each boundary. Will disperse, preventing tearing and tearing. Moreover, if only the elongated elastic member 20 is provided, the flexibility is not impaired, and the air permeability is not impaired because the shape is elongated. Moreover, when the linear part 20s nearest to the front-rear direction center side (crotch side) of the tape-type disposable diaper in the elongated elastic member 20 is arranged in this manner, when the diaper is worn, the slanted elastic member 20 is slanted. Since the portion fixed so as to be easily stretched along the groin portion or the shape of the heel portion, the fitting property in the vicinity of the fastening tape 5 is enhanced.

  The elongated elastic member 20 does not necessarily have to be arranged so that the first part A1 and the second part A2 are continuous, but the number of parts is larger than the discontinuity due to being continuous. Therefore, it is preferable to be continuous because it is easy to manufacture.

  Further, the elongated elastic members 20 arranged in the first part A1 and the second part A2 are not necessarily arranged in a straight line, and may be arranged in a curved line. In short, as described above, in the first portion A1, the elongated elastic member 20 extends in the longitudinal direction along a fixed position that approaches the waist edge W side from the distal end portion 5p toward the fixed portion 5f. The second portion A2 is fixed in a stretched state along the fixing position such that it approaches the crotch side (the side opposite to the waist edge side) as it goes from the tip portion 5p side to the fixing portion 5f side. It is only necessary that the elongated elastic member is fixed in a state of being elongated linearly along the longitudinal direction.

  Furthermore, it is not necessary to form a plurality of first parts A1 and second parts A2, and for example, if the length of the fastening tape 5 in the front-rear direction is short, the first part A1 and the second part Only one A2 may be formed.

The fixing part of the elongated elastic member 20 can be determined as appropriate, but it is preferably sandwiched between the nonwoven fabrics NF forming the basic nonwoven fabric layer 51 and fixed with a hot melt adhesive. The elongate elastic member 20 is preferably bonded intermittently at predetermined regular intervals in the longitudinal direction. In particular, the main body 5b is intermittently bonded, and the fixed portion 5f and the tip 5p are continuously bonded. Is preferred. In the figure, this adhesive portion is indicated by a dot pattern (shaded). The total amount of adhesive used for fixing the elongated elastic member 20 and fixing between other nonwoven fabrics is preferably 5 to 40 g / m ² in the main body portion 5b, and in the tip portion 5p. it is preferable to be 10 to 60 g / m ^2, preferably between 5 to 60 g / m ² in the fixing portion 5f.

  The method for forming the reinforced nonwoven fabric layer 52 is not particularly limited, but a nonwoven fabric NF that is separate from the nonwoven fabric NF that forms the basic nonwoven fabric layer 51 on the inner surface or outer surface of the basic nonwoven fabric layer 51, as in the tip portion 5p shown in FIG. The reinforced nonwoven fabric layer 52 can be formed by adhering with a hot melt adhesive. Further, as shown in FIGS. 6 and 7, at least one of the fixing portion 5f and the front end portion 5p, the end portions of the nonwoven fabric NF forming the basic nonwoven fabric layer 51 are folded back to be single or double (Z-shaped) to face each other. The reinforced nonwoven fabric layer 52 can also be formed by bonding the surfaces with a hot melt adhesive. When the fixing portion 5f is sandwiched between sheets (between the back sheet 1 and the exterior sheet 12 in the illustrated example), the edge of the folded portion of the fixing portion 5f does not protrude from between the sheets 1 and 12. It is preferable to hide.

  FIG. 9 shows an application example of the fastening tape to the trimless manufacturing method. The trimless manufacturing method is a manufacturing method with zero trim (excess waste). In this production method example, first, a plurality of continuous belt-shaped nonwoven fabrics NF are fed out and bonded together with a hot melt adhesive, and the elongated elastic members 20 are stretched at predetermined positions on both sides in the CD direction between the nonwoven fabrics NF. Fix with adhesive. Next, both ends in the CD direction are folded back to the center side and fixed with a hot melt adhesive. Thus, the portion of the fixing portion 5f that becomes the reinforcing nonwoven layer 52 can be formed by folding the same nonwoven fabric NF as the basic nonwoven fabric layer 51 in a single layer. Then, as shown in FIG. 6B, the CD direction center line side end portion is symmetrical with respect to the CD direction center line L1 at the one side portion and the other side portion with respect to the CD direction center line. Double-folding (in other words, the central portion in the CD direction is folded back into an Ω shape), and a connecting portion 9 such as a hook tape is provided on the surface of the folded portion opposite to the folded side (or the folded side surface). Thereby, as shown in FIG. 6, the reinforced nonwoven fabric layer 52 of the front-end | tip part 5p can be formed by folding back the nonwoven fabric NF of the basic nonwoven fabric layer 51 twice. Further, as shown in FIG. 3C, a continuous strip-shaped nonwoven fabric NF is separately drawn out and attached to the center portion in the CD direction with a hot melt adhesive, and further on it (the opposite surface may be different from the illustrated example). ) By providing the connecting portion 9 such as a hook tape, as shown in FIGS. 5 and 7, the reinforcing nonwoven layer 52 at the tip portion 5 p can be formed of a separate nonwoven fabric NF.

  Then, the continuous sheet St thus formed is cut by a wavy periodic curve L2 continuous in the length direction of the continuous sheet while alternately traversing the connecting portions 9, and at a predetermined position where the desired fastening sheet shape is obtained, in the CD direction. Each fastening tape 5 can be manufactured by cutting along a cutting line (not shown) from the outer edge to the wavy periodic curve L2.

  On the other hand, in the fastening tape 5 shown in FIG. 8, a perforation 10 is provided along the width direction from the outer edge in the width direction at the intermediate portion in the vertical direction to the inside of the main body 5 b, and by separating the perforation 10, The upper stage part and the lower stage part are each provided with a fixing part, a main body part, a tip part, and a connecting part. It is desirable that the separation line by the perforation 10 is arranged so as not to cross the elongated elastic member 20, or in the case of crossing, the elongated elastic member 20 is cut at the same time when the cut portion of the perforation 10 is formed. . Instead of the perforation 10, it may be separated by cutting or the like in advance. Such a fastening tape 5 can be detachably connected to the front target tape 6 on the abdominal side in a state where the upper and lower steps intersect. At this time, the upper step portion and the lower step portion are inclined obliquely with respect to the width direction. However, if the elongated elastic members 20 are arranged in a triangular wave shape as described above, the inclination is sufficient even in such an inclination direction. Elasticity is demonstrated. Of course, the present invention is not limited to such a two-stage division type, and can be applied to other known fastening tapes such as a type having only one stage or a type having no perforation 10 and separated in advance.

(Other embodiments)
As shown in FIG. 11, the crotch side edge of the fastening tape 5 is formed obliquely so as to form an angle of θ ₃ with respect to the width direction so as to approach the crotch side as it goes from the front end portion 5p toward the fixing portion 5f. You can also Since the fastening tape 5 is formed in this way, the direction of the force along the leg circumference of the diaper does not change to a steep angle with the fastening tape, so that the fastening tape 5 can be smoothly expanded and contracted, and the fit around the leg is high. It will be a thing. The angle θ ₃ is preferably 5 to 30 degrees. Further, when the fastening tape 5 is formed in the shape as described above, the linear portion 20 s closest to the crotch side edge of the elongated elastic member 20 is along the crotch side edge of the tape-type disposable diaper in the fastening tape 5. It is preferable to arrange in such a manner.

When configured in this manner, the waist edge side edge of the fastening tape 5 is inclined so as to form an angle of θ ₃ with respect to the width direction so as to approach the waist edge side as it goes from the tip part 5p toward the fixing part 5f. It can also be formed. In this case, the fastening tape portion 5 is separated in advance without providing the perforation 10.

  INDUSTRIAL APPLICATION This invention is utilized for the attachment method of the elastic member in manufacture of an absorbent article, and a tape-type disposable diaper.

It is a top view which shows the inner surface side of the expansion | deployment state of a tape-type disposable diaper. It is a top view which shows the outer surface side of the expansion | deployment state of a tape-type disposable diaper. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is AA sectional drawing of FIG. It is sectional drawing of another fastening tape part. It is sectional drawing of another fastening tape part. It is an enlarged view of a fastening tape part. FIG. 9 is a partially enlarged view of FIG. 8. 6A is a plan view, FIG. 6B is a cross-sectional view when the fastening tape shown in FIG. 5 is manufactured, and FIG. 6C is a cross-sectional view when the fastening tape shown in FIG. 6 is manufactured. It is an enlarged view of the other fastening tape part.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Liquid impervious back sheet, 2 ... Liquid permeable top sheet, 3 ... Absorber, 4 ... Barrier sheet, 5 ... Fastening tape, 6 ... Target tape, 7 ... Elongated elastic member, 9 ... Hook tape, 10 ... perforations, 12 ... exterior sheet, 13 ... elongated elastic member, 20 ... elongated elastic member, 51 ... basic nonwoven fabric layer, 52 ... reinforcing nonwoven fabric layer, NF ... nonwoven fabric.

Claims (5)

Fastening tape that has a ventral part and a dorsal part, and is detachably connected to the other part from both sides in the width direction of at least one of the ventral part and the dorsal part, respectively. In a tape-type disposable diaper,
The fastening tape has a fixed portion fixed to the one portion and a protruding portion that protrudes from the fixed portion and is not fixed to the one portion. The protruding portion is a connecting portion for the connection. And a main body portion closer to the base end side than the front end portion,
The main body portion of the fastening tape has a first portion and a second portion located on the crotch side from the first portion,
The elongated elastic member is fixed to the first portion in a state where the elongated elastic member is stretched along the longitudinal direction along a fixing position that approaches the waist end edge side from the tip end side toward the fixing portion side. Has been
An elongated elastic member is fixed to the second portion in a state where the elongated elastic member is extended in the longitudinal direction along a fixing position that approaches the crotch side from the tip side toward the fixing portion. ,
This is a tape-type disposable diaper.   2. The tape according to claim 1, wherein a plurality of unit structures including the first portion and the second portion located on the crotch side are arranged in parallel on the body portion of the fastening tape from the waist edge side to the crotch side. Type disposable diapers.   The elongated elastic member is provided so as to form a triangular wave shape that extends in a vertical direction of the fastening tape while reciprocating between the fixing portion and the tip portion across the main body portion. Or the tape type disposable diaper of 2.   The tape-type disposable diaper according to any one of claims 1 to 3, wherein the crotch side edge of the fastening tape is formed so as to approach the crotch side as it goes from the tip end side toward the fixed portion side. .   The tape-type disposable diaper according to any one of claims 1 to 4, wherein the elongate elastic member is fixed intermittently at a predetermined regular interval in a longitudinal direction of the elongate elastic member.

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