JP4087997B2 - A sanitary napkin having an upright line below the absorbent element - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sanitary napkin having a gather flap and having an upright line below an absorbent element.
[0002]
[Prior art]
In sanitary napkins, it is extremely important to prevent side leakage of body fluids. For this reason, Japanese Patent Publication No. 7-71570 discloses a gather flap formed on both sides to prevent side leakage of body fluid with the gather flap.
[0003]
[Problems to be solved by the invention]
However, in this prior example, due to the shrinkage of the gather flap, the longitudinal direction of the absorber is deformed into a boat shape, but almost no deformation force acts in the width direction. Accordingly, there is no side leakage prevention function on both sides of the absorbent body, and body fluid side leakage is prevented only by the gather flap.
[0004]
In this case, the gather flap comes into contact with the skin, but the absorbent body may be separated from the skin. As a result, the absorbability is hindered.
[0005]
In addition, the napkin is fixed to the shorts via the adhesive applied to the back surface of the back sheet (sheet that prevents leakage of body fluid from the absorber to the back surface), but the entire back surface of the absorber is fixed to the back sheet. In this case, since the absorbent body also moves with the movement of the shorts, the use surface of the absorbent body is separated from the skin, so that the body fluid is not absorbed and leakage tends to occur.
[0006]
Therefore, the main problem of the present invention is to lift both sides of the absorbent element from the back side to the use side with gather flaps, so that at least both sides are always fitted to the body, preventing side leakage, If side leakage occurs from both sides, the side flap is finally prevented by gather flaps, thus providing a double side leakage prevention function. . Another problem is to lift both sides of the absorbent element from the back side to the use side by reliably raising the gather flap without being constrained by the backsheet.
[0007]
[Means for Solving the Problems]
The present invention that has solved the above problems is as follows.
[0008]
[0009]
[0010]
<Invention of Claim 1 >
An absorbent element that receives the body fluid from the use surface side and holds it inside;
A gather flap having elastic elastic members in the extending portions of the gather flap sheet that are at both sides on the back side of the absorbent element and extend outward in the width direction from both side edges of the absorbent element at least in the middle in the longitudinal direction; ,
A leakage prevention sheet for preventing leakage of bodily fluid from the absorbent element to the back side in order:
Each gather flap sheet is fixed in an overlapped state on the leakage prevention sheet, folded at a standing rising line inside the side edge of the absorbent element, and outward in the width direction from both side edges of the absorbent element. It extends, and Ri gather flap sheets mutually unfixed der in the folded region,
Each gather flap sheet is folded back a plurality of times on the center side of the product, and the final folded portion extends outward in the width direction from both side edge positions of the absorbent element.
This is a sanitary napkin characterized by the above.
[0011]
(Function and effect)
A. The absorbent element receives the body fluid from the use surface side and holds it inside, but does not penetrate the back surface side due to the leakage prevention sheet.
B. Since the gather flap has an elastic elastic member in the extending portion of the gather flap sheet that extends outward in the width direction from the side edge of the absorbent element, the gather flap stands on the use surface side by its contraction force. This gather flap constitutes the final barrier cuff for preventing side leakage.
C. By raising the gather flap, both sides or the whole of the absorbent element is lifted from the back surface side to the use surface side. As a result, at least both sides of the body always fit the body, and the absorbability into the absorbent element is enhanced while preventing side leakage. If a side leak occurs from both sides, the side flap is finally prevented by a gather flap.
D. The gather flap sheet is fixed on the leak-proof sheet, and the area from the side edge of the absorbent element to the standing rising line on both sides of the gather flap sheet is not fixed on the leak-proof sheet. That is, even if the leakage prevention sheet is fixed to the shorts by having a standing erection line below the absorbent element, the area from the side edge to the erection erection line of the gather flap is back via the erection line. In order to stand up reliably without being restrained by the side leakage prevention sheet, the effect of C is remarkably exhibited.
E. Since the entire leak-proof sheet is covered with a gather flap sheet, the absorbed body fluid is not conspicuous in color due to the presence of the gather flap sheet when the napkin is used, and is absorbed by the user. It looks like there is room, and the value of the product increases from the supplier's perspective.
F. The gather flap uses a hydrophobic or water-repellent nonwoven fabric to improve the skin feel. On the other hand, it is desirable to use a plastic sheet such as polyethylene as the leakage prevention sheet to reliably prevent liquid leakage, but the plastic sheet has a poor skin feel. Thus, for example, by fixing a gather flap sheet using a non-woven sheet in a superposed state on the leakage prevention sheet, it is possible to improve the deterioration of the feeling due to the plastic sheet.
I. Gather the flap sheet, that is folded multiple times in the center of the product, contrary cushioning between the use surface side and the back side of the product is applied to, on both sides and gather the flaps of the absorbent element The side edges always come into contact with the skin.
[0012]
<Invention of Claim 2 >
The leakage preventing sheet is a sanitary napkin according to claim 1 Symbol mounting extends outwardly in the widthwise direction from both side edges located in the gather the flap.
[0013]
(Function and effect)
The following effects are also brought about.
G. Since the leakage prevention sheet extends outward in the width direction from the both side edge positions of the gather flap, even if body fluid leaks outward beyond the side edge of the gather flap, Stops bodily fluids and prevents stains on shorts and clothing.
H. In the final process of the product, it is necessary to cut both sides to define the outer shape at the stage of final lamination of each material, but it is difficult to cut the leakage prevention sheet in alignment with the side edge positions of the gather flap. At some point, the leakage prevention sheet is extended outward in the width direction from the both side edge positions of the gather flap, and the product is easily commercialized by cutting at the extended position.
[0014]
[0015]
[0016]
<Invention of Claim 3 >
The sanitary napkin according to claim 1 or 2 , wherein a central region between the rising erection lines on both sides is a separation region where the absorbent element and the leakage prevention sheet are not in a fixed relationship.
[0017]
(Function and effect)
J. et al. The central region between the rising erection lines on both sides is a marginal region in which the absorbent element and the leakage prevention sheet are not in a fixed relationship, so that the shorts can be formed through the adhesive applied to the back surface of the leakage prevention sheet. Even if fixed, the absorbent element can be lifted to the use surface side, and this lift is promised by the contraction force of the elastic elastic members of the gather flap, so the use surface of the absorbent body is reduced with the movement of the shorts. It is possible to reliably prevent leakage due to separation from the skin and absorption of body fluids.
[0018]
[0019]
As sheet constituting the gather the flap of the present invention, when Ru used made of a material having a fluid blocking property, side leakage preventing effect is high. However, Der because intended for gathering flap in the uniquely to achieve lateral upright of the absorbent element of the present invention can also be used which consist of hydrophilic material, next to gather the flap itself when the Although the leakage prevention effect cannot be expected to be large, side leakage can be prevented by standing the side of the absorbent element.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings.
[0021]
<First comparative embodiment (not included in the present invention) >
The first comparative form is shown in FIGS. 1 to 6, with the upper side of FIG. 1 being the front.
[0022]
The sanitary napkin of the first comparative form is used from the side to the back side;
An absorbent element 10 for receiving body fluid from the use surface side and holding it inside,
At least in the middle of the longitudinal direction, the elastic elastic member 21 is on the back surface side of the absorbent element 10 and extends outward in the width direction from both side edges of the absorbent element 10. , 21 and a gather flap 20 having
A leakage preventing sheet 30 made of, for example, a polyethylene sheet, which prevents body fluid from leaking from the absorbent element 10 to the back surface, and extends outward in the width direction from both side edge positions of the absorbent element 10;
In order.
[0023]
The absorbent element 10 is located on the use surface side and allows the body fluid to pass therethrough, and the top sheet 11 using a non-woven fabric or preferably a polyethylene sheet having a small hole for passing the body fluid from the outer surface to the inner surface direction but preventing reversal. And an absorbent core 12 having absorbent paper that wraps the upper and lower surfaces or the entire surface thereof as necessary. Of course, a polymer-absorbing polymer can be contained. In this comparative embodiment, the top sheet 11 wraps around the use surface and both side surfaces of the absorbent core 12 and extends from the free starting point 40 on the bottom surface to the center side (so-called frame winding).
[0024]
The gather flap 20 is preferably made of a non-woven material such as hydrophobic or water repellent, and is made of a body fluid-inhibiting sheet 22 that can also be used as a body fluid-impermeable plastic sheet. The gather flap sheet 22 forming the gather flap is fixed on both sides of the leakage prevention sheet 30 in a superposed state with, for example, a hot melt adhesive (the fixing portion is indicated by *). Folded on the center side of the product, directed outward in the width direction with the crease 22B as a boundary, and the entire portion 22C1 up to the free start point 40 on the inner side of the side edge of the absorbent element 10 or the vicinity of the free start point 40 Only the absorbent element 10 and the hot melt adhesive or the like are fixed, and the width direction outer portion 22C2 from the free starting point 40 is not fixed to the absorbent element 10 and in the overlapping region of the gather flap sheet 22 Is also unfixed. Thus, the fold 22B constitutes an electromotive TatsuOkoshi line 50.
[0025]
Here, the boundary as in FIG shown, portions 22C1 to the free origin 40 is also the gather the flap sheets 22 mutually overlay area is a non-stationary, the entire folded region 22C gather the flap 20 is orthostatic Okoshisen 50 Thus, it is possible to stand up freely on the use surface side.
[0026]
On the other hand, standing support embosses 51 and 51 are formed from the use surface side along the longitudinal direction at positions inside the both side edges at least in the middle in the longitudinal direction of the absorbent element 10. The standing-promoting embosses 51, 51 are arcs having an arc center on the side outward of the napkin or substantially arcuate curves. Furthermore, connecting embosses 52, 52 are formed by connecting arcs or substantially arc-shaped curves in the direction by connecting the embosses 51, 51 for standing promotion. In the region closed by these embosses 51, 51, 52, 52, the absorbent core 12 is set to a medium height. Therefore, it is set as the structure which aims at absorption in the middle and high part of the absorption core 12 in the embossing 51,51,52,52 area | region intensively.
[0027]
FIG. 2 shows the relationship between the fixed part and the non-fixed part of the hot melt adhesive. As the front and rear end fixing portions, the top sheet 11 and the leakage prevention sheet 30 are fixed, the leakage prevention sheet 30 and the gather flap sheet 22 are fixed to each other, and the folded portions of the gather flap sheet 22 are fixed. The fixing parts other than the front and rear end parts are as shown in FIGS.
[0028]
3 and FIG. 4 as the non-fixed portion, the hatched area Z1 in FIG. 2 is an area in which the folded portions of the gather flap sheet 22 are not fixed to each other, and the hatched area in broken lines A portion indicated by Z2 is a region where the absorbent element 10 and the gather flap sheet 22 are not fixed. It is desirable that the standing rising line 50 substantially coincides with the position in the width direction in the middle in the longitudinal direction of the standing embossing emboss 51.
[0029]
Here, as the elastic elastic member 21, an elastic elastic foam (for example, urethane foam) may be employed in addition to the rubber thread. A plurality of, for example, two elastic elastic members 21 in the width direction are excellent in standing and lifting properties. The adhesion length with the gather flap sheet 22 is preferably 50 to 150 mm, particularly preferably 80 to 130 mm, and the stretch rate is preferably 110 to 180%.
[0030]
The extending width W1 from the side edge of the absorbent element 10 of the gather flap 20 is desirably 5 to 30 mm, particularly 7 to 15 mm. The pocket width W2 is desirably 2 to 20 mm, and the width of 22C is desirably 20 to 40 mm. The length is preferably 50 to 120 mm. The width of 22C2 is preferably 10 to 30 mm. The separation width W3 between the standing line 50 and the position in the middle of the longitudinal direction of the standing-promoting emboss 51 is preferably 0 to 10 mm, particularly preferably 0 to 3 mm.
Under such a configuration, when mounting the Na Pukin is shorts adhesive provided on the back surface (surface) of the leak-proof sheet 30 (not shown) as well as temporarily fixed against the shorts the inner surface, the wing portion 31 And temporarily fixed with an adhesive (not shown).
[0032]
The wearing state is conceptually shown in FIGS. The napkin is curved along the crotch portion in the front-rear direction. At this time, the side part of the gather flap 20 stands up by the contraction force of the elastic elastic members 21 and 21. Since this gather flap 20 has the elastic elastic member 21 in the extending part extended outward in the width direction from the side edge of the absorbent element 10, it comes to stand on the use surface side by its contraction force. Therefore, the gather flap 20 constitutes the final barrier cuff for preventing side leakage. Moreover, by raising the gather flap 20, both side portions of the absorbent element 10 are lifted from the back surface side to the use surface side. As a result, at least both sides of the body always fit the body, and the absorbability into the absorbent element 10 is enhanced while preventing side leakage. If a side leak occurs from both sides, the side flap is finally prevented by the gather flap 20.
[0033]
As in Figure shown, gather the flap 20, the absorbent element has a free origin 40 at the inner position than the side edge 10, the free starting point 40 width outward portions than are non-fixed and the absorption element 10. However, the side of the absorbent element 10 is not restrained by the gather flap sheet 22 of the gather flap 20 when the absorbent element 10 is bent in the front-rear direction along the crotch portion when the napkin is attached. The side portion rises and deforms to the use surface side independently with the curved deformation of the absorbent element 10, and the gather flap 20 also stands and deforms independently. Accordingly, even with intense exercise, either the side of the absorbent element 10 or the side edge of the gather flap 20 comes into contact with the skin, and the side leakage prevention effect is high.
[0034]
Further, since the pocket P is formed between the side edge of the absorbent element 10 and the free starting point 40 on the back surface of the absorbent element 10, the pocket P is formed between the absorbent element 10 and the use surface of the gather flap 20. Even if it exceeds, the body fluid is absorbed by the absorbent element 10 in the process of temporarily staying in the pocket P, and therefore the rising edge of the gather flap 20 is rarely reached.
[0035]
Further, the outer portion in the width direction from the free start point 40 of the gather flap 20 is not fixed to the absorbent element 10, and the overlapping portion of the gather flap sheets 22 is not fixed, and therefore is not related to the leakage prevention sheet 30. Therefore, the gather flap 20 can stand up freely without being related to the folding prevention of the leakage prevention sheet 30 to the outer surface of the garment, for example.
[0036]
In this case, folded inside the erected Okoshisen 50 from the side edge of absorption element 10, because gather the flap sheets 22 mutually in the folded region 22C is non-stationary, the entire folded region 22C gather the flap 20 is free to use Since it stands up on the surface side, the side of the gather flap 20 and the absorbent element 10 can stand up smoothly and reliably.
[0037]
Here, when the standing assisting embosses 51 and 51 are formed, the side portions of the absorbent element 10 are surely raised along the standing assisting embossments 51 and 51 due to the contraction of the gather flap 20. A small contraction force of the elastic elastic member of the gather flap 20 that is required is sufficient, and the contact force with the skin is also small, which makes it comfortable.
[0038]
<Second comparative embodiment (not included in the present invention) >
In the first comparative embodiment, the gather flap 20 is composed of two gather flap sheets 22 on the left and right. In contrast, as shown in FIG. 7, which is formed by wide single gather the flap sheet 220 from the absorbent element 10 is Ru second comparative embodiment der. In this case, the leakage preventing sheet 30 may be a single plastic sheet or, if necessary, a laminate of a nonwoven fabric on the use surface side of polyethylene of the leakage preventing sheet 30.
[0039]
In the second comparative embodiment, since the entire leakage prevention sheet 30 is covered with the gather flap sheet 220, the absorbed body fluid is colored due to the presence of the gather flap sheet 220 when viewed from the back of the product after the napkin is used. Therefore, it seems that there is an absorption capacity from the user's point of view, and the value of the product increases from the viewpoint of the supplier.
[0040]
<Third comparative form (not included in the present invention) >
FIG. 8 shows a third comparative form in which the individual gather flap sheets 22 are arranged on both sides without being folded back, and the inner width region from the free starting points 40, 40 is defined as the leakage prevention sheet 30. It is fixed.
[0041]
<Embodiment of the present invention >
FIG. 9 shows an embodiment of the present invention . Each gather flap sheet 22 is fixed in an overlapped state on the leakage prevention sheet 30, and is folded back multiple times on the center side of the product, and finally folded. The portion extends outward in the width direction from the positions of both side edges of the absorbent element 10.
[0042]
Thereby, the gather flap sheet 22 is folded back multiple times on the center side of the product, and conversely, cushioning is provided between the use surface side and the back surface side of the product, The side edges of the gather flap 20 are always in contact with the skin .
[0043]
< Others >
In each of the above examples, as shown in the drawing, the absorbent element 10 and the leakage preventing sheet 30 are fixed also in the central region between the standing upright lines 50, 50 on both sides, but as in the comparative embodiment shown in FIG. The edge region X in which the absorbent element 10 and the leakage preventing sheet 30 are not in a fixed relationship can be used. The length between the folds 22B and 22B forming the separation region X is preferably 20 to 50 mm.
[0044]
Thus, since the separation region X is formed, even if the leakage prevention sheet 30 is fixed to the shorts via the adhesive on the back surface, the absorbent element 10 is lifted by the contraction force of the elastic elastic member 21 of the gather flap 20, Thus, the absorbent element 10 always fits the skin. Moreover, even if a force that shifts or twists in the width direction acts on the absorbent element 10 due to the movement of the wearer, the absorbent element 10 can follow well between the crotch.
[0045]
In this case, as shown in the drawing, it is desirable to take a fixing portion between the absorbent element 10 and the gather flap sheet 22 outside the upright line 50.
[0046]
Moreover, like the comparative form shown in FIG. 8, the elastic expansion-contraction members 23 and 23 are provided in the both sides of the absorption element 10, and it can raise stand-up property more. Without providing the free starting point 40, the entire overlapping portion of the absorbent element 10 and the gather flap sheet 22 may be fixed . The other embodiments, including the selection of the wood charge can be suitably adopted within the scope of the present invention.
[0047]
【The invention's effect】
As described above, according to the present invention, the absorbent element is lifted from the back surface side to the use surface side by the gather flap, and at least the both side parts are always fitted to the body to prevent side leakage. If the internal absorbability is increased and a side leak occurs from both sides, the gather flap will ultimately prevent the side leak, thus providing a double side leak prevention function. it can.
In addition, by reliably raising the gather flaps without being constrained by the backsheet, both side portions of the absorbent element can be lifted from the back surface side to the use surface side, and the above-described effect becomes obvious.
[Brief description of the drawings]
FIG. 1 is a plan view from the use surface side of a sanitary napkin according to a first comparative embodiment .
FIG. 2 is an explanatory diagram of fixed and non-fixed portions.
FIG. 3 is a view taken along line 3-3 in FIG. 1;
FIG. 4 is an enlarged cross-sectional view of a main part thereof.
FIG. 5 is an enlarged cross-sectional view of a main part in use.
FIG. 6 is a perspective view of a usage state. FIG. 7 is an enlarged cross-sectional view of a main part of a second comparative embodiment.
FIG. 8 is an enlarged cross-sectional view of a main part of a third comparative embodiment.
FIG. 9 is an enlarged sectional view of a main part of the embodiment of the present invention .
FIG. 10 is an enlarged cross-sectional view of a main part of another comparative embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Absorbing element, 11 ... Surface sheet, 12 ... Absorbing core, 20 ... Gather flap, 21 ... Elastic elastic member, 22 ... Gather flap sheet, 30 ... Leak prevention sheet, 31 ... Wing part, 40 ... Free origin, 50 ... Standing up line.

Claims (3)

An absorbent element that receives the body fluid from the use surface side and holds it inside;
A gather flap having elastic elastic members in the extending portions of the gather flap sheet that are at both sides on the back surface side of the absorbent element and extend outward in the width direction from both side edges of the absorbent element at least in the middle in the longitudinal direction; ,
A leakage prevention sheet for preventing leakage of bodily fluid from the absorbent element to the back side in order:
Each gather flap sheet is fixed in an overlapped state on the leakage prevention sheet, is folded at a standing rising line inside the side edge of the absorbent element, and outward in the width direction from both side edges of the absorbent element. It extends, and Ri gather flap sheets mutually unfixed der in the folded region,
Each gather flap sheet is folded back multiple times on the center side of the product, and the final folded portion extends outward in the width direction from the side edge positions of the absorbent element.
A sanitary napkin characterized by that. The leakage preventing sheet is both side edges extending Mashimashi to have claim 1 Symbol placement of the sanitary napkin in the widthwise direction outward of the position of the gather the flap. The sanitary napkin according to claim 1 or 2 , wherein a central region between the standing erection lines on both sides is a separation region where the absorbing element and the leakage prevention sheet are not in a fixed relationship.

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