JP5681406B2 - Disposable diapers - Google Patents

Description

  The present invention is an invention relating to a disposable diaper in which an internal absorbent pad can be easily replaced.

For example, diapers for adults are known as pants and tapes, but in consideration of waste reduction and economic efficiency, they are generally used with an absorbent pad inside. is there.
When replacing the absorbent pad, in the tape type disposable diaper, it is necessary to remove the tape and unfold the diaper.In the pants type disposable diaper, it is necessary to lower the diaper to the knee level at least. It is complicated. In particular, pants-type disposable diapers are often worn by the wearer instead of the caregiver, and the operation of changing the absorbent pad by sliding the diaper is impossible, such as when the wearer bows down. There was a problem of having to take a posture.
On the other hand, a diaper that is pre-formed like a pants-type disposable diaper but can be deployed like a tape-type disposable diaper is also known. There is an advantage that it is easy to replace the pad and the diaper body, but when the wearer himself replaces the absorbent pad, the problem is that it is difficult to replace the absorbent pad for the same reason as in the above-mentioned pants-type disposable diaper Still have.

JP 2006-204688 A

  The main subject of this invention is making it easier to replace | exchange the absorption pad laid on the inner surface of a disposable diaper.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
Having a ventral side extending to the front side from the crotch part and a dorsal side part extending to the rear side from the crotch part,
In the disposable diaper in which the ventral part and the dorsal part are integrated in advance or in use so as to form an annular waist part, and a waist opening and a pair of left and right leg openings are formed,
The at least one waistline component part of the abdominal part and the dorsal part is located in the center part in the width direction, and the first part connected to the crotch part is not separated from the second parts on both sides thereof. Configured to slide vertically,
A disposable diaper characterized by that.

(Function and effect)
The disposable diaper which concerns on this invention becomes a structure which can slide the crotch part provided with the center part of the abdominal side part and the interior body connected to it in the wearing state below. By sliding and lowering the ventral center part, the opening around the leg is widened, so that a gap is generated around the leg, and the absorption pad can be replaced through the gap.

<Invention of Claim 2>
Rail members are provided on both sides of the first portion in the width direction so as to cut vertically from the waistline opening to the leg opening.
An occlusal portion that is engaged with the rail member and is movable in the extending direction of the rail member is provided on the side portion of the widthwise central portion of the second portion,
The both sides of the first portion in the width direction and the side portions of the second portion in the center in the width direction are overlapped, and the occlusal portion is engaged with the rail portion, so that the first portion is on both sides thereof. The disposable diaper of Claim 1 comprised so that it could slide to a vertical direction, without isolate | separating with respect to a 2nd part.

(Function and effect)
By using the slide part as a rail member and a member engaging with the rail member, it is possible to slide the ventral center part in both the vertical direction and to repeat the slide movement a plurality of times.

<Invention of Claim 3>
The fixing means for detachably fixing the overlapping portion of the first portion with the second portion and the overlapping portion of the second portion with the first portion is provided. The disposable diaper described.

(Function and effect)
In order to avoid unexpected slipping when wearing and complete separation of the central part and side part of the abdomen, a detachable fixing means is provided near the upper and lower ends of the rail member, and the rail member is fixed when sliding movement is not required The configuration was made possible.

<Invention of Claim 4>
The disposable diaper according to claim 3, wherein the second part is configured to overlap the outer side of the first part, and the fixing means is provided on the outer side in the width direction than the rail member and the occlusal part. .

(Function and effect)
By arranging the ventral side portions (second portion) outside the ventral center portion (first portion), the ventral center portion is pressed from the outside by the ventral side portions, and a more stable form is obtained. Further, by disposing the fixing means for the rail member on the outer side in the width direction from the rail member, it is difficult to come off due to turning of the end portions on the center side of the abdominal side, and more stable fixing is possible.

<Invention of Claim 5>
The rail member is fixed to the first part by a detachable locking means, and the rail member and the second part are separated from the first part by peeling of the locking means. The disposable diaper of Claim 4 comprised as follows.

(Function and effect)
In addition to the rail part and the occlusal part, the diaper can be brought into an unfolded state by having a locking means for removably fixing the both side parts and the central part on the abdomen side and removing the locking part. I did it.

  According to the present invention, when the absorbent pad is replaced, the absorbent pad can be exchanged through the leg opening portion while being worn by sliding the crotch portion downward from the ventral center portion. By adopting such a configuration, it is possible to easily replace the absorbent pad without putting the diaper into an unfolded state or lowering it to the knee area when replacing the absorbent pad.

It is a top view (inner surface side) of the underpants type disposable diaper of a deployment state. It is the top view which abbreviate | omitted the elastic member from FIG. It is a top view (outside) of the underpants type disposable diaper of a deployment state. It is CC arrow line view of FIG. It is an AA arrow line view of FIG. It is a BB arrow line view of FIG. It is a perspective view of the wearing state of a pants type disposable diaper. It is a perspective view of the underpants type disposable diaper in the state where the ventral center part was slid downward. It is a top view which shows the structure of a slide part. It is sectional drawing of a slide part. (A) A slide part having a concave rail, (B) a slide part having a convex rail. FIG. 4 is a DD arrow view of FIG. 3. It is a perspective view showing an example of a tape type disposable diaper concerning the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
1-8 has shown the underpants type disposable diaper 1 as an example of embodiment. A pants-type disposable diaper 1 (hereinafter, also simply referred to as a diaper) has an exterior sheet 20A that extends from the back side B to the center of the abdomen F and a pair of exterior sheets 20B on both sides of the abdomen. The interior body 10 is fixed to and integrated with the inner surfaces of the sheets 20A and 20B, and the interior body 10 has an absorber 13 interposed between a liquid-permeable top sheet 11 and a liquid-impermeable back sheet 12. It has been made. At the time of manufacture, after the back surface of the interior body 10 is fixed to the inner surface (upper surface) of the exterior sheet 20A in a state where the exterior sheets 20A and 20B are integrated, the interior body is fixed. 10 and the exterior sheet 20 are folded at the center in the longitudinal direction (front-rear direction), which is the boundary between the ventral side F and the back side B, and both sides thereof are joined to each other by heat welding or hot melt adhesive. The pants-type disposable diaper is formed with a waist opening and a pair of left and right leg openings. In addition, the manufacturing method of the diaper in this invention is not limited to the said method.

(Abstract structure example)
As shown in FIGS. 5 and 6, the absorbent main body 10 has an absorbent body 13 interposed between a liquid-permeable top sheet 11 made of nonwoven fabric or the like and a liquid-impermeable back side sheet 12 made of polyethylene or the like. The excreted liquid that has permeated through the top sheet 11 is absorbed and held.

  As the liquid-permeable surface sheet 11 covering the surface side (skin contact surface side) of the absorbent body 13, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. The material fibers that make up the nonwoven fabric can be synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. When a large number of through holes are formed in the liquid permeable surface sheet 11, urine and the like are quickly absorbed, and the dry touch property is excellent. The liquid permeable top sheet 11 is wound around the side edge of the absorber 13 and extends to the back side of the absorber 13.

  As the liquid-impermeable back sheet 12 that covers the back surface side (non-skin contact surface side) of the absorbent body 13, a liquid-impermeable plastic sheet such as polyethylene or polypropylene is used. Those having wettability are preferably used. 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. is there.

  Absorbent body 13 is a known one, for example, a pulp fiber stack, a filament aggregate such as cellulose acetate, or a non-woven fabric, mixed with a superabsorbent polymer as necessary, fixed, etc. In the example shown in the figure, a shape formed with a substantially rectangular planar shape is used, and the width dimension is a dimension width that does not give the wearer a feeling of goreness by hitting the crotch part. The absorbent body 13 can be packaged with a wrapping sheet 14 having liquid permeability and liquid retention, such as crepe paper, if necessary, for holding the shape and polymer. The shape of the absorber 13 may be a rectangular shape as shown in the figure, or may be an hourglass shape (constricted shape) in which the width of the crotch portion is narrower than the back side and the abdominal side.

  It is preferable that solid gather BSs that fit around the legs are formed on both sides of the absorbent main body 10. This three-dimensional gathered BS is formed by the gathered nonwoven fabric 15. As the gathered nonwoven fabric, as shown in FIG. 5, a nonwoven fabric made into a double sheet by folding is preferably used, and is wound by the liquid-permeable surface sheet 11. The side edge portion of the absorbent body 13 is further rolled up from the upper side thereof and extends to the back surface side of the absorbent body 13 to be bonded. More specifically, the gathered nonwoven fabric 15 has a three-dimensional gather BS forming portion left in the middle portion in the longitudinal direction of the diaper 1, and a range from the middle portion in the width direction to the back side of the absorbent body 13 is bonded by a hot melt adhesive or the like. Further, at the longitudinal front and rear end portions, the section from the width direction intermediate portion to the one side end edge is bonded in a range extending to the back surface side of the absorber 13, and a portion forming the three-dimensional gather BS is attached to the absorber 13 It is bonded with a hot melt adhesive or the like while being folded at the upper surface.

  Inside the gathered nonwoven fabric 15 formed of a double sheet nonwoven fabric, a plurality of thread-like elastic elastic members 16, 16... The thread-like elastic elastic members 16, 16... Are for forming a three-dimensional gather BS by raising the nonwoven fabric portion protruding from the absorber side edge by elastic elastic force as shown by a two-dot chain line in FIG. 5 in the product state. It is.

  The liquid-impermeable back side sheet 12 enters the inside of the double sheet-like gathered nonwoven fabric 15 and constitutes a leak-proof wall on the lower end side of the three-dimensional gathered BS as shown in FIG. . As the liquid-impermeable back side sheet 12, it is desirable to use an opaque sheet so that brown such as defecation and urine does not appear. As the opacification, a plastic film and a pigment and filler such as calcium carbonate, titanium oxide, zinc oxide, white carbon, clay, talc and barium sulfate are preferably used.

  As the thread-like elastic elastic member 16, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, and the like that are usually used can be used. In order to make it difficult to see from the outside, it is preferable that the thickness is 925 dtex or less, the tension is 150 to 350%, and the interval is 7.0 mm or less. Instead of the thread-like elastic elastic member, a tape-like elastic elastic member having a certain width may be used.

  In the same manner as the liquid-permeable surface sheet 11, the material fibers constituting the gathered nonwoven fabric 15 are olefin-based, polyester-based, amide-based synthetic fibers such as polyethylene or polypropylene, regenerated fibers such as rayon and cupra, and cotton. Non-woven fabric obtained by an appropriate processing method such as a spunbond method, a thermal bond method, a melt blown method, a needle punch method, etc. can be used. It is preferable to use a nonwoven fabric that suppresses the basis weight and has excellent air permeability. Furthermore, for the gathered nonwoven fabric 15, in order to prevent the transmission of urine and the like, to prevent fogging, and to enhance the touch to the skin (dry feeling), silicon-based, paraffin metal-based, alkylchromic croid-based water repellent, etc. It is desirable to use a water-repellent non-woven fabric coated with.

(External sheet structure example)
The exterior sheet is composed of an exterior sheet 20A arranged from the back side B to the abdominal side center F, and an exterior sheet 20B on both sides of the abdomen. The part is preferably overlapped so that the sheet 20B comes to the outside (OL in the figure) and integrated by a slide structure (described later) in the slide part 30. Each of the exterior sheets 20A and 20B is a nonwoven fabric sheet having a two-layer structure including an upper layer nonwoven fabric 20a and a lower layer nonwoven fabric 20b. Various elastic members are disposed between the non-woven fabrics of the folded portion 20c that is folded back to give stretchability.

  In particular, in the illustrated exterior sheet, the elastic member includes waist elastic members 24, 24,... Arranged around the waist opening 23 in the developed shape shown in FIG. A plurality of waist elastic members 25, 25... Are arranged along the horizontal direction at intervals in the vertical direction on both sides of the ventral side. Further, in the back side B, apart from the waist elastic members 25, 25..., The crotch side extends from the one side joining edge that joins the abdominal side F and the back side B and bypasses the crotch side. A plurality of curved elastic member groups 26 are provided that reach the other side joining edge of the ventral portion and the dorsal portion and that are arranged at intervals without crossing each other. In addition, in this exterior sheet | seat, what is called a leg periphery elastic member substantially continuous along a leg periphery is not provided. In the illustrated example, the curved elastic member group is not disposed on the abdominal side, but the curved elastic member may be disposed discontinuously from the abdominal center to both the abdominal sides.

  The waist elastic members 24, 24... Are disposed in the vicinity of the waist opening edge in the vicinity of the waist opening edge within the range of the side joint edges 21 and 22 where the ventral side F and the back side B are joined. A plurality of thread rubber-like elastic members that are attached to the body by applying an expansion / contraction force so as to tighten around the waist of the body. For the waist elastic member 24, rubber thread is used in the illustrated example. However, for example, a tape-like elastic member may be used. Moreover, although the waist part elastic members 24, 24 ... of an illustration form are clamped between the nonwoven fabrics of the folding | returning part 20c of the lower layer nonwoven fabric 20b in a waist part, even if it clamps between the upper layer nonwoven fabric 20a and the lower layer nonwoven fabric 20b. good.

  The waist elastic members 25, 25... Are thread rubber-like that are disposed along the horizontal direction at intervals in the vertical direction over the range from the upper part to the lower part of the side joint edges 21, 22. This is an elastic member for applying a horizontal expansion / contraction force to the waist side portions of the abdominal side portion and the back side portion, respectively, to bring the diaper into close contact with the body. In the back side, the boundary between the waist elastic members 24, 24... And the waist elastic members 25, 25. For example, even if the number of elastic members arranged horizontally in the vertical direction on the ventral side F and the back side B is not specified, some on the upper side are the waist elastic members. It is only necessary that the remaining elastic members function as waist elastic members.

  On the back side B, the back-side curved elastic member groups 26, 26... Arranged separately from the waist-around elastic member groups 25, 25. A plurality of lines arranged along a curve that reaches the crotch portion along the line 29, reaches the other side side joint edge 22 while being substantially along the leg leg cut line 29 after crossing the crotch portion, In the illustrated example, there are nine thread rubber-like elastic members, and these back-side curved elastic member groups 26, 26... Are arranged at intervals without crossing each other. The dorsal curved elastic member groups 26, 26,... Are arranged so as to form a predetermined expansion / contraction zone, instead of arranging a few elastic expansion / contraction members at a close interval and substantially as one bundle. Three or more, preferably five or more are arranged at a predetermined interval.

  Moreover, in the said form example, the waist elastic member group 25,25 ... and the curved elastic member 26 ... which are arrange | positioned at the back part B cut | disconnect the part which crosses the absorptive main body 10, and are making it discontinuous, It can also be arranged continuously on the sex main body 10. By making the elastic member discontinuous on the absorbent main body 10, the absorber 13 can be further prevented from shrinking. The cutting method described in JP 2002-35029 A, JP 2002-178428 A, and JP 2002-273808 A is used to cut the curved elastic member 26 on the absorbent main body 10 to make it discontinuous. Is preferably employed.

(Slide structure)
The overlap portion OL of the exterior sheets 20A and 20B has slide portions 30A and 30B on the outside of the exterior sheet 20A and the inside of the exterior sheet 20B so as to vertically cut the overlap portion. The structure of the slide part is shown in FIGS. The slide part 30 has a concave (FIG. 10A) and convex (FIG. 10B) rail structure as shown in FIGS. 9 to 11, and as shown in FIG. The convex rails 31B are structured to bite each other. The convex rail 31B in the illustrated example has a substantially circular cross section, but the cross sectional shape is not particularly limited as long as it has a structure that engages with the concave rail 31A, such as a hook shape or a polygonal shape. In the illustrated example, both the concave rail 31A and the convex rail 31B are arranged over the entire length direction of the slide portion, but only one of them may be intermittent. In the illustrated example, the slide rail 30A is provided with a concave rail, and the slide portion 30B is provided with a convex rail. Moreover, the rail structure of a slide part is not restricted to one set, You may distribute | arrange two or more sets of rail structures which bite mutually.

  The slide portions 30A and 30B are preferably formed of a synthetic resin. In addition to the rail structure, the slide portions 30A and 30B have a film-like structure that occupies a certain range including the rail structure as shown in FIG. It is preferable to use a flexible resin film made of the like. With such a structure, when the rail structures that engage each other are shifted (slid) in the vertical direction, the friction around the rails is reduced and smooth sliding is enabled. The film-like members constituting the slide portions 30A and 30B are fixed to the exterior sheets 20A and 20B with a hot melt adhesive G or the like, respectively.

  The upper and lower ends of the slide portions 30A and 30B have detachable locking portions 32A and 32B, respectively. In the locking portion, the slide portion 30A and the slide portion 30B are fixed in a state of being opposed to each other, and have a structure that does not cause an unintended vertical shift during transportation and wearing. In addition, the upper end of the ventral center part falls off from the lower end of the slide part during sliding, thereby preventing the diaper from being unfolded. The shape of the locking portions 32A and 32B is not limited as long as the above-mentioned sliding prevention and falling-off prevention are possible, but a hook tape and a loop tape can be preferably used. In the illustrated example, the hook tape 32A is disposed on the slide portion A and the loop tape 32B is disposed on the slide portion B, but they may be reversed. The locking portions 32A and 32B may be arranged on either the center side or the side end side from the rail, but it is preferable to arrange the locking portions 32A and 32B on the side end side because peeling due to lifting of the end portion of the exterior sheet 20B hardly occurs.

  FIG. 7 shows a state of the diaper 1 in a worn state, and FIG. 8 shows a state in which the ventral center part of the diaper is slid downward. At the time of sliding, the locking portions 32A and 32B are peeled off, and the ventral center portion is pulled downward to be slid. When the ventral center part moves downward, the leg opening 33 is greatly expanded, and the absorption pad can be exchanged through this opening.

(Other forms)
The present invention is not limited to a pants-type diaper, and can be used for a tape-type diaper 40 as shown in FIG. When arranging the slide part 30 in a tape type diaper, it is preferable to arrange | position to the outer side member of the side end side rather than the tape fastening part 41 like the example of illustration. By peeling off the fastening part 41, the slide part 30 is separated from the central part member together with the abdominal side end side member, and the diaper can be in an unfolded state.

  DESCRIPTION OF SYMBOLS 1 ... Pants type disposable diaper, 10 ... Absorbent main body, 11 ... Liquid-permeable surface sheet, 12 ... Liquid-impermeable back side sheet, 13 ... Absorber, 14 ... Packaging sheet, 15 ... Gathered nonwoven fabric, 16 ... String-like elastic Elastic member, 20 ... exterior sheet, 21, 22 ... side joint edge, 24 ... waist elastic member, 25 ... waist elastic member, 26 ... curved elastic member, 29 ... leg cut line, 30 ... slide part, 31A 31B ... Rail, 32A ... Hook tape, 32B ... Loop tape, 33 ... Opening around leg, 40 ... Tape type disposable diaper, 41 ... Tape fastening part.

Claims (5)

Having a ventral side extending to the front side from the crotch part and a dorsal side part extending to the rear side from the crotch part,
In the disposable diaper in which the ventral part and the dorsal part are integrated in advance or in use so as to form an annular waist part, and a waist opening and a pair of left and right leg openings are formed,
The at least one waistline component part of the abdominal part and the dorsal part is located in the center part in the width direction, and the first part connected to the crotch part is not separated from the second parts on both sides thereof. Configured to slide vertically,
A disposable diaper characterized by that. Rail members are provided on both sides of the first portion in the width direction so as to cut vertically from the waistline opening to the leg opening.
An occlusal portion that is engaged with the rail member and is movable in the extending direction of the rail member is provided on the side portion of the widthwise central portion of the second portion,
The both sides of the first portion in the width direction and the side portions of the second portion in the center in the width direction are overlapped, and the occlusal portion is engaged with the rail portion, so that the first portion is on both sides thereof. The disposable diaper of Claim 1 comprised so that it could slide to a vertical direction, without isolate | separating with respect to a 2nd part.   The fixing means for detachably fixing the overlapping portion of the first portion with the second portion and the overlapping portion of the second portion with the first portion is provided. The disposable diaper described.   The disposable diaper according to claim 3, wherein the second part is configured to overlap the outer side of the first part, and the fixing means is provided on the outer side in the width direction than the rail member and the occlusal part. .   The rail member is fixed to the first part by a detachable locking means, and the rail member and the second part are separated from the first part by peeling of the locking means. The disposable diaper of Claim 4 comprised as follows.

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