JP3575990B2 - Disposable diapers - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an open-type disposable diaper.
[0002]
[Prior art]
In the disposable diaper described in Japanese Utility Model Laid-Open Publication No. 5-65321, the side of the rear waist region partially extends in the waist direction, covers the waist region, and can reach the front waist region. The vehicle has a wing portion, and a connection means with the front waist region is formed near the outer edge of the wing portion. This disposable diaper uses a wing portion as a fastener instead of a tape fastener.
[0003]
[Problems to be solved by the invention]
However, if a wing that functions as a fastener is to be formed on the side of the rear waist area, the rear waist area must be made as large as the wing part, and that much sheet material must be used. Become.
[0004]
It is an object of the present invention to provide a disposable diaper in which the wings can be made relatively small, thereby reducing the use of sheet material in the rear waist area.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention is based on the assumption that a liquid-permeable topsheet, a liquid-impermeable backsheet, and a liquid-absorbent core interposed between these sheets are provided. The longitudinal direction crossing the direction is constituted by a front waist region, a rear waist region, and a crotch region located between these two regions, and extends in the waist direction from both sides of the rear waist region. This is a disposable diaper worn by detachably engaging a wing portion with an outer surface of the front waist region.
[0006]
On this premise, the present invention is characterized in that the wing has a portion protruding toward a center line that bisects the width direction of the diaper at a portion separated from the side edge of the wing by a predetermined distance inward. A tab that can be bent outward in the waist direction is formed by a single cutting line extending through the wing portion in the thickness direction, and at least the tab is bent on the outer surface of the tab. Sometimes, a portion extending outward from a side edge of the wing portion is provided with an engaging means (first engaging means) detachable from the outer surface of the front waist region.
[0007]
In an example of the embodiment of the present invention, an engaging means (second engaging means) detachably attached to the outer surface of the front waist region near the wing side edge is formed on the inner surface of the wing part. .
[0008]
In another example of the embodiment, the first engagement means is also formed at a position located inside a side edge of the wing when the tab is bent.
[0009]
In another example of the embodiment, the wing portion includes at least the top sheet, the back sheet, a reinforcing sheet piece interposed therebetween, and the first engagement means.
[0010]
In another example of the embodiment, the first engagement means and the second engagement means are formed of one of mechanical fasteners comprising a loop member and a hook member, and the front waist region An engagement area formed of the other member of the mechanical fastener is formed on the outer surface of the mechanical fastener.
[0011]
In one example of the embodiment, the first engagement means and the second engagement means are an adhesive applied to the wing.
[0012]
In another example of the embodiment, the cutting line has an upper end located above the wing and a lower end located below the wing, and extends from the upper end toward the center line. Is substantially parallel to an imaginary horizontal line extending perpendicular to the center line, and a portion extending from the lower end toward the center line is within an intersection angle range of 20 to 60 ° with respect to the imaginary horizontal line. .
[0013]
In another example of the embodiment, a distance between a line connecting upper and lower ends of the cutting line and a side edge of the wing portion is in a range of 3 to 30 mm.
[0014]
In another example of the embodiment, a line connecting upper and lower ends of the cutting line extends in a direction crossing the center line.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
The details of the disposable diaper according to the present invention will be described below with reference to the accompanying drawings.
[0016]
1 and 2 are a partially broken plan view of the inner surface of the disposable diaper 1 and a cross-sectional view taken along the line II of FIG. The disposable diaper 1 has a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a liquid-absorbent core 4 bonded to the inner surface of at least one of the sheets 2 and 3, The longitudinal direction crossing the direction is constituted by a front waistline region 20, a rear waistline region 22, and a crotch region 21 located between both regions 20,22.
[0017]
The top sheet 2 and the back sheet 3 have a portion extending outward in the longitudinal direction from both edges of the core 4 and a portion extending outward in the width direction from both edges of the core 4. Are formed on the inner surfaces of the front and rear waist regions 20, 22 to form wing portions 23, 24 extending in the waist direction. The crotch region 21 is formed with a concave notch 11 recessed toward the side edge of the core 4, the elastic member 12 extending and contracting along the concave notch 11 extends, and the front and rear waist regions 20, 22 include: The elastic members 13 and 14 extend along these edges 15 and 16. The elastic members 12, 13, and 14 are located between the sheets 2 and 3 and are joined to the inner surface of at least one of the sheets 2 and 3 in an extended state. When the elastic members 12, 13, and 14 are released from the extended state, gathers for the leg circumference and the waist circumference are formed on both side edges of the crotch region 21 and end edges of the front and rear waist regions 20 and 22. . An engagement area 19 for attaching and detaching the flap 24 of the rear waist area 22 is formed on the outer surface of the front waist area 20 (see FIG. 3).
[0018]
The wing portion 24 of the rear waist region 22 is provided between the top sheet 2, the back sheet 3, and the sheets 2 and 3, and is connected to at least one of the inner surfaces of the sheets 2 and 3. And formed. The wing portion 24 of the rear waist region 22 extends inwardly from the side edge 10 of the wing portion 24 by a predetermined distance toward the center line Y that bisects the width direction of the diaper 1 and protrudes. A tab 6 through which the wing portion 24 can be partially bent is formed by a single cutting line A passing through the portion 24 in the thickness direction. In the figure, a straight line B obtained by connecting both ends P and Q of the cutting line A is indicated by a virtual line. In FIG. 1, one of the tabs 6 is bent along the straight line B toward the back sheet 3. The rigidity value of the wing portion 24 including the reinforcing sheet piece 5 by the Clark method is in the range of 60 mm to 200 mm.
[0019]
In the diaper 1, a first engaging means 7 is formed on the outer surface of the tab 6 so as to be attached to and detached from the engaging area 19 of the front waistline area 20. On the inner surface of the wing portion 24 of the rear waist region 22, the second engaging means 8 a, which is attached to and detached from the engaging region 19 of the front waist region 20, near the upper portion and the lower portion of the side edge 10 of the wing portion 24. 8b are formed. For the first and second engaging means 7, 8a, 8b, one of mechanical fasteners composed of a hook member and a loop member known as a trade name of magic tape or the like is used. It is preferable to use another member for the engagement area 19. These members are joined to the top sheet 2 and the back sheet 3 by an adhesive or heat welding means. Further, an adhesive can be used for the first and second engaging means 7, 8a, 8b instead of the mechanical fastener. At this time, a synthetic resin film is used for the engagement area 19 so that the adhesive engagement means can be folded back and detached.
[0020]
As the top sheet 2, a non-woven fabric made of a hydrophobic non-woven fabric treated with a hydrophilic agent, a synthetic fiber kneaded with a hydrophilic agent, or the like is used. As the back sheet 3, a synthetic resin film or a laminate sheet of a synthetic resin film and a hydrophobic nonwoven fabric is used. If a synthetic resin film in which the polymer chains are oriented parallel to the center line Y or a non-woven fabric in which the fibers are oriented parallel to the center line is used for the reinforcing sheet 5, the tabs 6 are moved in the waist direction. Even when pulled, the wings 24 are not easily broken.
[0021]
FIG. 3 is a perspective view of the disposable diaper 1 showing a worn state. In the diaper 1 configured as described above, the tip 6b of the tab 6 is gripped with a finger, the tab 6 is bent along a straight line B, and the first engaging means 7 is attached to the engaging area 19 of the front waist area 20. At the same time, the second engagement means 8a and 8b of the wing portion 24 are attached to the engagement area 19 of the front waistline area 20. Since the wing portions 24 of the rear waist region 22 engage with the engagement regions 19 of the front waist region 20 at these three locations, the front and rear waist regions 20 and 22 can be reliably connected. The diaper 1 is formed with a waist opening 17 and a pair of leg openings 18, and the wing portion 24 of the rear waist region 22 is formed with an opening 9 at a position where the tab 6 was present. Since the moisture inside the diaper 1 is discharged to the outside through the opening 9, the inside of the diaper 1 can be prevented from becoming uneven.
[0022]
4 and 5 are partial views of the inner surface of the wing portion 24 of the rear waist region 22. FIG. 5 shows a state in which the tab 6 is bent outward in the waist direction. The cutting line A has upper and lower ends P and Q located inside the side edge 10 of the wing portion 24 and vertically separated from each other. A line A1 extending from the upper end P toward the center line Y and a center line from the lower end Q It comprises a line A2 extending toward Y and a line A3 connecting these lines A1 and A2. The line A1 extends substantially parallel to a virtual horizontal line X orthogonal to the center line Y, and the line A2 is inclined so as to have an ascending gradient toward the center line Y, and the line A2 is at an angle of 20 to 60 °. Extend so as to intersect at an intersection angle α. The cutting line A is a series as shown, but may be detachably connected to the wing portion 24 at one or two or more positions, or the cutting line A may be a perforation that can be separated. . The distance W1 between the straight line B extending between the upper and lower ends P and Q of the cutting line A substantially in parallel with the side edge 10 of the wing portion 24 and the side edge 10 of the wing portion 24 is preferably 3 to 30 mm.
[0023]
The first engagement means 7 is formed leaving the base end and the tip end of the tab 6 in the illustrated example, but may extend to the vicinity of the straight line B. As shown in FIG. 5, when the tab 6 is bent, the side edge 7 a of the first engagement portion 7 facing the straight line B overlaps the vicinity of the side edge 10 of the wing portion 24. Since the tab 6 and the wing portion 24 are engaged with each other in a portion where these overlap, the twist of the tab 6 can be suppressed, and the operation of attaching the wing portion 24 to the engagement region 19 of the front waist region 20 can be performed. It will be easier. The dimension W2 where these overlap is preferably 2 to 5 mm from the side edge 10 of the wing portion 24 toward the inside.
[0024]
FIG. 6 is a partial view of the inner surface of the wing portion 10 in the rear waist region 22 in a mode different from FIGS. 4 and 5, in which the tab 6 is bent outward in the waist direction. The tab 6 includes lines A1 and A2 extending from the upper and lower ends P and Q substantially parallel to the virtual horizontal line X toward the center line Y, and lines A3 connecting these lines A1 and A2 and extending parallel to the center line Y. It is formed with. At the upper and lower ends P and Q of the cutting line A, straight lines B that extend so as to have a downward slope from the upper end P toward the lower end Q toward the side edge 10 of the wing portion 24 extend. The tab 6 bent to the waist direction outward O at the straight line B intersects the virtual horizontal line X and is inclined so as to have an ascending gradient toward the waist direction outward O. Conversely, the straight line B may be inclined so as to approach the center line Y from the upper end P toward the lower end Q. In this case, the bent tab 6 intersects the virtual horizontal line X and is inclined so as to have a downward slope toward the outside O in the waist direction.
[0025]
The vicinity C of the upper and lower ends P and Q of the cutting line A can be bent so that they extend in a direction away from each other or in a direction approaching each other. By doing so, the wing portion 24 can be hardly broken when the tab 6 is pulled.
[0026]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the disposable diaper which concerns on this invention, since the wing part which functions as a fastener does not need to be enlarged especially, the sheet material for making a back waist area can be saved.
[0027]
Since the wings of the rear waist region are attached to and detached from the engagement region of the front waist region at three locations, the engagement between the front waist region and the rear waist region does not easily come off while the diaper is being worn. Since the opening is formed when the tab is folded, the air permeability is improved.
[Brief description of the drawings]
FIG. 1 is a partially broken plan view of an inner surface of a diaper.
FIG. 2 is a sectional view taken along line II of FIG. 1;
FIG. 3 is a perspective view of a diaper in a worn state.
FIG. 4 is a partial view of an inner surface of a wing in a rear waist region of the diaper.
FIG. 5 is a partial view of a wing with a bent tab.
FIG. 6 is a partial view of the wing in a different form from FIG. 5 in which the tab is bent.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Liquid-permeable topsheet 3 Liquid-impermeable backsheet 4 Liquid-absorbent core 5 Reinforcement sheet piece 6 Tab 7 First engaging means 8a, 8b Second engaging means 10 Side edge 19 of wing part Engage Area 20 Front waist area 21 Inseam area 22 Rear waist area 24 Wing A Cutting line P Upper end Q Lower end W1 Separation dimension X Virtual horizontal line Y Center line α Intersection angle

Claims (9)

A liquid-permeable top sheet, a liquid-impervious back sheet, and a liquid-absorbent core interposed between these sheets, the longitudinal direction intersecting the waist direction is a front waist area, and a rear waist area. And a crotch region located between these two regions, and wing portions extending in the waist direction from both sides of the rear waist region are detachably engaged with the outer surface of the front waist region. Disposable diapers to wear
The wing portion, at a position separated from the side edge of the wing portion by a predetermined dimension inward, extends convexly toward a center line that bisects the width direction of the diaper, and penetrates the wing portion in the thickness direction. A tab that can be bent outward in the waist direction is formed by a single cutting line that extends outwardly from a side edge of the wing at least when the tab is bent. The above-mentioned diaper, wherein an engaging means (first engaging means) detachable from the outer surface of the front waist region is formed in a part. 2. The diaper according to claim 1, wherein an engagement means (second engagement means) detachable from the outer surface of the front waist region is formed near an edge of the wing part on an inner surface of the wing part. The diaper according to claim 1 or 2, wherein the first engagement means is also formed at a portion located inside a side edge of the wing portion when the tab is bent. The diaper according to any one of claims 1 to 3, wherein the wing portion includes at least the top sheet, the back sheet, a reinforcing sheet piece interposed therebetween, and the first engagement means. The first engagement means and the second engagement means are formed of any one of a mechanical fastener comprising a loop member and a hook member, and an outer surface of the front waist region includes the mechanical fastener of the mechanical fastener. The diaper according to any one of claims 2 to 4, wherein an engagement area made of the other member is formed. The diaper according to any one of claims 2 to 4, wherein the first engagement means and the second engagement means are an adhesive applied to the wing. The cutting line has an upper end located above the wing and a lower end located below the wing, and a portion extending from the upper end toward the center line is orthogonal to the center line. The portion extending substantially parallel to the virtual horizontal line extending from the lower end toward the center line is within an intersection angle range of 20 to 60 ° with respect to the virtual horizontal line. The diaper described. The diaper according to any one of claims 1 to 7, wherein a distance between a line connecting upper and lower ends of the cutting line and a side edge of the wing portion is in a range of 3 to 30 mm. The diaper according to any one of claims 1 to 8, wherein a line connecting upper and lower ends of the cutting line extends in a direction intersecting the center line.

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