JP3873109B2 - Sanitary napkin with embossing across the mid-high - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sanitary napkin having an emboss that traverses a mid-high portion.
[0002]
[Prior art]
In a sanitary napkin, it is extremely important to ensure a good fit while preventing side and side leakage of body fluids. For this reason, as disclosed in JP-A-11-33054 and the like, the middle and high portions are formed only in the central portion in the longitudinal direction in order to improve the fit and absorbency, and the prevention and absorption of the absorbent body. It is known to form embossments (squeezed grooves) to prevent front and back or side leakage of body fluid in the element region.
[0003]
[Problems to be solved by the invention]
Forming the mid-high portion is extremely effective for improving fit and absorbability to the crotch region.
[0004]
However, in the prior art, the middle and high portions are formed only in the central portion in the longitudinal direction, and therefore, it is not suitable for night use that requires a long time use and a large absorption capacity.
[0005]
Accordingly, an object of the present invention is to provide a sanitary napkin that is particularly suitable for night use and has significantly improved fit and absorbability to the crotch.
[0006]
[Means for Solving the Problems]
The present invention that has solved the above problems is as follows.
[0007]
<Invention of Claim 1>
An absorption element that receives body fluid from the use surface side and holds it in the internal absorbent body, and a leakage prevention sheet that is on the back surface side and prevents leakage of body fluid from the absorption element to the back surface side,
The absorbent body has a middle and high portion that is substantially over the entire length in the longitudinal direction and is high on the use surface side in the center portion in the width direction,
Side embosses extending to the vicinity of both end edges in the longitudinal direction of the absorber are formed on both sides of the middle-high portion of the absorber, and these embosses are connected by transverse embossing that crosses the middle-high portion at least on the front and rear sides. And
At least in the middle of the product in the longitudinal direction, it has elastic elastic members with respect to the gathered cuff sheet that is not allowed to permeate body fluids at both sides of the product. A gather cuff standing on the skin side of the user, and a substantially arc-shaped fit emboss having a center of curvature outwardly spaced 3 to 8 mm outside the front side portion of each side embossing,
The gather cuff is fixed to the use surface side of the product in the longitudinal direction, and the first free portion facing outward in the width direction, between these fixed portions is not fixed to the use surface side of the product. A second free portion that is folded back and goes inward in the width direction,
An elastic elastic member for standing is fixed in the vicinity of the folded portion, and an elastic elastic member for contact is fixed to the second free portion inward in the width direction from the elastic elastic member for standing.
A sanitary napkin characterized by that.
[0008]
(Function and effect)
A. The absorbent body has a middle and high portion that is high on the use surface side substantially over the entire length in the longitudinal direction and in the center portion in the width direction.
Therefore, the mid-high portion bites into the crotch portion, the fitting property becomes good, and comes into close contact with the blood drainage port, so that the spot absorbability is also excellent. Moreover, since the middle and high portions extend substantially over the entire length in the longitudinal direction of the absorber, the absorption capacity per product length is large.
B. Side embosses extending to the vicinity of both end edges in the longitudinal direction of the absorber are formed on both sides of the middle and high portions of the absorber, and these embosses are connected by transverse embosses that cross the middle and high portions in the front and rear.
Due to the presence of continuous embossing, the body fluid absorbed by the absorbent body can be prevented from leaking from the front and left and right where a large amount of absorbed body fluid is accumulated at the front and back, and front leakage is likely to occur. The side embossing prevents the middle and high parts from being crushed and prevents the middle and high parts from twisting. Therefore, since the middle and high parts are always maintained, the cause of leakage due to the formation of a gap between the skin and the skin can be eliminated.
As described above, in order to increase the absorption capacity per product length, it is desirable not only that the middle and high parts extend over the entire length in the longitudinal direction of the absorbent body, but also because there is no sense of incongruity and to prevent lateral displacement from the crotch part. It was found desirable.
On the other hand, against the occurrence of warpage before and after the middle and high portions, the warpage can be prevented by the transverse embossing crossing the middle and high portions. In addition, it has been found that even if a transverse emboss is formed on the middle and high parts, the transverse embossing can prevent front-rear leakage.
D. At the time of wearing, due to the contraction force of the gathered cuffs, the absorbent element is deformed so that it stands up on the use surface side by side embossing and fit embossing on the front side from the blood drainage port, and both sides of the front part from the blood draining port The adhesion of the absorbent element to the skin is improved, and the standing of the gather cuff is also improved, so that side leakage can be reliably prevented.
[0009]
<Invention of Claim 2>
The sanitary napkin according to claim 1, wherein front cross embossing that is continuous with each side embossing on the front side bulges outward.
[0010]
(Function and effect)
C. Body fluid tends to accumulate on the front side, but the front cross-embossed bulge outwards from each side embossed to the outside, so it can be absorbed not only at the middle and high parts but also at the bulged part. The absorption capacity is large.
[0011]
[0012]
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings.
[0014]
<Embodiment: FIGS. 1-7>
In FIG. 1, the upper side is the front side of the product. Hereinafter, “inside”, “inside” and “outside” and “outside” refer to the width direction of the product.
[0015]
The sanitary napkin of the present invention comprises an absorbent element 10 that receives body fluid from the use side and holds it inside, a polyethylene sheet that is on the back side and prevents leakage of body fluid from the absorbent element 10 to the back side, and the like. A leakage prevention sheet 30 is provided.
[0016]
Preferably, elastic gathering members 22A and 22B made of, for example, thread rubber are provided on the gathered cuff sheet 21 which is on both sides of the product and does not substantially allow permeation of body fluids at least in the middle of the product in the longitudinal direction. It is desirable to provide a gather cuff 20 that stands on the user's skin side by the contraction force of the elastic elastic members 22A and 22B when the product is mounted.
[0017]
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. The absorbent body 12 is formed with a middle and high portion 12A having a cotton-like pulverized pulp that receives and holds the body fluid therein and, if necessary, absorbent paper (not shown) that further wraps the upper and lower surfaces or the entire surface thereof. . Of course, a polymer-absorbing polymer can be contained. In the embodiment, the top sheet 11 covers the use surface of the absorber 12.
[0018]
The middle-high part 12A extends along the longitudinal direction across the blood outlet part (conceptually indicated by the symbol Z (see FIG. 7)) at the center in the longitudinal direction of the product, and on the use surface side in the center part in the width direction. It is a high part.
[0019]
Each gather cuff 20 is provided (formed) at a position where the absorbent body 12 having semi-rigidity of the absorbent element 10 is located.
[0020]
The leak prevention sheet 30 extends outward from the side edge of the absorbent element 10 and serves as a component member of the flap.
[0021]
The gather cuff sheet 21 is preferably made of a non-woven material such as hydrophobic or water repellent, and if necessary, a body fluid-impermeable plastic sheet or the like is also used. It is fixed to the surface with hot melt adhesive. The gather cuff sheet 21 extends outward from the side edge of the absorbent element 10, and the extending portion 21 </ b> B is overlaid on the leakage prevention sheet 30 and integrated with each other by a hot melt adhesive or the like. The flap 40 is configured. The flap 40 is divided into a front flap 40A, a wing portion 40B for winding around the crotch portion of the shorts, and a rear flap 40C that widens the wings substantially from the middle in the longitudinal direction toward the rear.
[0022]
The gather cuff sheet 21 is folded at the first folding line L1 at the inner edge of the base 21A to form a first folding part 21C that goes outward in the width direction, and a second folding line L2 at the end of the first folding part 21C. The second folded portion 21D that is folded inward in the width direction is formed, and is folded at the third folded line L3 at the end of the second folded portion 21D so as to contain the elastic elastic members 22A and 22B. The part 21E and the overlapping part 21F are fixed to the first folded part 21C and the second folded part 21D in a superposed state by a hot melt adhesive or the like.
[0023]
In order to constitute the gather cuff 20, the gather cuff sheet 21 has a first melt-turned portion 21C on the use surface side of the product, in the embodiment, on the surface of the base 21A only at both ends in the longitudinal direction of the product. It is fixed by an adhesive or the like (this fixing region is indicated by hatching by a broken line in FIG. 1). In addition, the second folded portion 21D is fixed to the overlapping portion 21F and the first folded portion 21C via the overlapping portion 21E by a hot melt adhesive or the like (this fixing region is indicated by a solid line in FIG. 1). (Shown by hatching). In addition, each fixed area | region can also be fixed intermittently instead of the whole surface.
[0024]
On the other hand, as clearly shown in FIG. 4, between the longitudinal ends of the product, the first folded portion 21C is not fixed to the use surface side of the product, and the second folded portion 21D is the first. A first free portion X that is not fixed to the folded portion 21 </ b> C and goes outward, and a second free portion Y that is turned back and goes inward in the width direction are configured.
[0025]
An elastic elastic member 22A for standing is fixed in the vicinity of the second folding line L2 (within ± 1.5 mm), and elastic for contact with the second free portion Y in the width direction from the elastic elastic member 22A for standing. The elastic members 22B and 22B are fixed.
[0026]
When the gathered cuff 20 is flattened, the width in plan view (also the width of the first free portion X or the second free portion Y) is desirably 8 to 18 mm.
[0027]
Here, as each elastic elastic member, besides elastic rubber, an elastic elastic foam (for example, urethane foam) can be adopted. When the rubber thread is used, the elastic elastic member 22A for standing can be provided in the vicinity of the second fold line L2 in a number of three or less. The number of the elastic elastic members 22B for contact may be one in the second folded portion 21D, but a plurality of, for example, two in the width direction is excellent in standing and lifting properties. Up to 6 can be arranged. However, the elastic elastic member 22B for contact is not provided inward of the inner edge (third fold line L3) of the second folded portion 21D, and it is separated from the inner edge by about 1 to 3 mm. Excellent contact.
[0028]
When the elastic elastic member is fixed, a hot melt adhesive is applied to the elastic elastic member and fixed to the gather cuff sheet 21, and a hot melt adhesive is applied to the gather cuff sheet 21 to fix the elastic elastic member. It may be. The stretching ratio of the elastic elastic member for standing 22A and the elastic elastic members for contact 22B, 22B is preferably 110 to 200%, particularly preferably 130 to 180%.
[0029]
It is desirable that the stretching stress of the elastic elastic member for standing 22A is larger than the tensile stress of the elastic elastic member for contact 22B from the standpoint of the whole gather cuff 20 to stand. The difference between the tensile stresses is preferably 10 to 40%.
[0030]
Furthermore, the fixing start position of the extended portion of the first free portion X is the longitudinal extension of the second free portion Y on the basis from the center in the longitudinal direction of the product at at least one of the front and rear ends, preferably both ends. It is desirable to deviate from the position of starting the overlapping fixing of the part to the first free part X toward the end edge in the longitudinal direction of the product. That is, as shown in FIG. 1, it is desirable that the effective contraction length D1 of the first free part X is longer than the effective contraction length D2 of the second free part Y.
[0031]
In the present invention, the absorbent element 10 is formed with a circumferential emboss 50 and a pair of arc-shaped fit embosses 51 for preventing the absorber 12 from shaking, preventing diffusion of body fluids, and improving fit. .
[0032]
The circumferential embossing 50 is formed on both sides of the middle-high part 12A as a side embossing according to the present invention over a length range straddling the blood outlet part Z, and these side embossing is a front side part of the blood outlet part Z. The embossing 50B and the rear side embossing 50C are formed by a bulging embossing 50A having a shape that bulges outward in the width direction.
Further, the front end embosses 50B and 50B on both sides are connected at the front end portion, and a head-like front emboss 50D having a bulge and the rear side embosses 50C and 50C on both sides at the rear end portion are connected in a semicircular shape. It has a rear embossing 50E and forms a continuous curve as a whole.
[0033]
Under such a configuration, when the napkin of the present invention is mounted, an adhesive (not shown) provided on the back surface (front surface) of the leakage prevention sheet 30 is temporarily attached to the inner surface of the shorts and the wing portion 40B. Is wound around the outer surface of the shorts and temporarily fixed with an adhesive (not shown).
[0034]
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 gather cuff 20 is erected by the contraction force of the elastic elastic members 22A and 22B. Accordingly, the gather cuff 20 constitutes a side cuff preventing cuff.
[0035]
At this time, the standing elastic elastic member 22A is fixed in the vicinity of the folded portion (second folded line L2) between the first free portion X and the second free portion Y. The gather cuff 20 stands on the use surface side by the contraction force of the elastic elastic member 22A for standing. Starting from this standing line (second folding line L2), the elastic elastic members 22B and 22B for contact are fixed to the second free portion Y, and the elastic elastic members 22B and 22B for contact are contracted. Due to the force, the product width direction inner portion of the second free portion Y rises higher on the use surface side than the standing line. Therefore, the standing height of the entire gather cuff 20 can be increased, and even if the movement of the wearer is extreme, it follows the movement well and always comes into contact with the skin, so the side leakage prevention effect is high.
[0036]
In forming the gather cuff 20, the folded form of the first free part X and the second free part Y is adopted. However, since the first free portion X and the second free portion Y are folded, the first free portion X and the second free portion Y can be erected within a narrow width in the width direction. It is excellent in body fluid acceptability and can take a large effective area for infiltration of body fluid. In addition, the first elastic part 22A for standing rises securely without being flattened due to the contraction force of the elastic elastic member for standing 22A along with the bending in the front-rear direction at the time of wearing, and elastic elastic expansion and contraction for contact. Similarly, the relatively narrow second free portion Y stands up without being flattened by the contraction force of the member 22B, so that the gather cuff 20 as a whole has a narrow width, but the gather cuff that stands up large and reliably. 20 is obtained. And, as the first free part X itself stands up reliably and the second free part Y itself stands up reliably, the cushioning property of the gather cuff 20 in the direction orthogonal to the surface of the product is improved, and the fit to the skin To improve the side leakage prevention effect.
[0037]
On the other hand, the absorbent element 10 according to the present invention has a middle-high portion 12A that extends along the longitudinal direction across the blood drainage site Z and is high on the use surface side in the center in the width direction. Accordingly, the mid-high portion 12A fits and adheres well to the crotch portion, and the body fluid from the blood drainage port is absorbed as it is into the mid-high portion 12A, and the absorbency is improved.
[0038]
The gather cuff 20 is configured so that the contraction force acts on a length range corresponding to a range straddling the blood outlet site Z, and has a length straddling the blood outlet site Z on both sides of the middle / high portion 12A of the absorbent element 10. Embosses are formed over a range, and these embosses have a bulging emboss 50A that has a shape that bulges outward in the width direction from the front and rear at the blood drainage site Z.
[0039]
However, due to the contraction force of the gather cuff 20, the entire length range of the absorbent element 10 corresponding to the contraction force action region tends to contract. At this time, since the bulging embossing 50A is provided, the bulging embossing 50A in the vicinity of the blood outlet site Z can be seen by the contour line S when the absorber 12 shown in FIG. 5 is deformed, and as shown in FIG. Swell to the side of the blood drain.
[0040]
As a result, not only the mid-high portion 12A of the absorbent element 10 fits between the crotch, but also the mid-high portion 12A swells and fits to the side of the blood drainage port, so that the blood drainage port and the absorbent element 10 are in close contact with each other. Therefore, the leakage prevention effect is high.
[0041]
The embosses 50B and 50C formed on both sides of the middle-high part 12A have a function of preventing the left and right sides of the middle-high part 12A from being left and right, but also have a function of blocking the absorbed body fluid outward in the lateral direction. However, even if there is excretion of bodily fluid exceeding the absorption performance in the middle / high portion 12A, the bulging emboss 50A has a shape that bulges outward in the width direction from the front and rear in the blood outlet site Z. Body fluid can also be absorbed outside 12A, and leakage can be prevented.
[0042]
Here, the absorber 12 may have a length of 270 to 310 mm and a width of 75 to 90 mm. The middle-high portion 12A can be 20 to 40% of the entire width of the absorber 12, the weight thereof can be 1.5 to 2 times that of both side portions, and the thickness can be 6 to 8 mm. It can be designed such that the blood drainage site Z is ± 10 mm to ± 30 mm from the center in the longitudinal direction of the product. The center of bulging embossing 50A, 50A can be set as the structure located 50-70 mm in the back side from the center of wing part 40B, 40B. The bulge length from the front and rear embossments of the bulge emboss 50A can be 5 mm to 30 mm.
[0043]
Ends of the front side embossing 50B, the bulging embossing 50A, and the rear side embossing 50C extend to the vicinity of both ends of the absorbent body 12 in the longitudinal direction. It is desirable that the extended end be separated from the longitudinal edge of the absorbent body 10 to 60 mm. 5-15 mm is suitable for the bulging length from the middle high part side edge of front cross embossing 50D. The rear cross embossing 50E is essential, but the front cross embossing 50D can be omitted. The preferred shape of the front transverse embossing 50D is substantially arcuate with the center of curvature outward as shown.
[0044]
The fit emboss 51 is preferably 3-8 mm away from the front cross emboss 50D. The longitudinal length of the fit emboss 51 is preferably 35 to 45 mm.
[0045]
Further, the embossing may be formed continuously or intermittently. When forming the emboss, as described in JP-A-9-108262, the emboss can be formed in a form in which the high pressing parts and the low pressing parts alternate in the length direction. Embossing can also be formed by pressure heat sealing or the like.
[0046]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a sanitary napkin that is particularly suitable for night use and has significantly improved fit and absorbability to the crotch.
[Brief description of the drawings]
FIG. 1 is a plan view from the use surface side in a first embodiment of a sanitary napkin of the present invention.
FIG. 2 is a view taken along line 2-2 in FIG.
FIG. 3 is a view taken along the line 3-3 in FIG. 1;
FIG. 4 is an enlarged cross-sectional view of a main part showing a relationship between a longitudinal end portion and a central portion of a gathered cuff when the sanitary napkin of the present invention is used.
FIG. 5 is a perspective view of the usage state. FIG. 6 is a side view of the usage state along line 6-6 in FIG.
FIG. 7 is a plan view centered on embossing.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Absorbing element, 11 ... Top sheet, 12 ... Absorber, 12A ... Middle-high part, 20 ... Gather cuff, 21 ... Gather cuff sheet, 22A ... Standing elastic elastic member, 22B ... Contact elastic elastic member, 30 ... Leakage prevention sheet 31, 40 ... flap, 50 ... circular embossing, 50 A ... bulging embossing, 50 B ... front side embossing, 50 C ... rear side embossing, 50 D ... front cross embossing, 50 E ... rear cross embossing, 51 ... fit Emboss, Z ... Blood drain site.

Claims (2)

An absorption element that receives body fluid from the use surface side and holds it in the internal absorbent body, and a leakage prevention sheet that is on the back surface side and prevents leakage of body fluid from the absorption element to the back surface side,
The absorbent body has a middle and high portion that is substantially over the entire length in the longitudinal direction and is high on the use surface side in the center portion in the width direction,
Side embosses extending to the vicinity of both end edges in the longitudinal direction of the absorber are formed on both sides of the middle-high portion of the absorber, and these embosses are connected by transverse embossing that crosses the middle-high portion at least on the front and rear sides. And
At least in the middle of the product in the longitudinal direction, it has elastic elastic members with respect to the gathered cuff sheet that is not allowed to permeate body fluids at both sides of the product. A gather cuff standing on the skin side of the user, and a substantially arc-shaped fit emboss having a center of curvature outwardly spaced 3 to 8 mm outside the front side portion of each side embossing,
The gather cuff is fixed to the use surface side of the product in the longitudinal direction, and the first free portion facing outward in the width direction, between these fixed portions is not fixed to the use surface side of the product. A second free portion that is folded back and goes inward in the width direction,
An elastic elastic member for standing is fixed in the vicinity of the folded portion, and an elastic elastic member for contact is fixed to the second free portion inward in the width direction from the elastic elastic member for standing.
A sanitary napkin characterized by that. The sanitary napkin according to claim 1, wherein front cross embossing continuous with each side embossing on the front side bulges outward.

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