JP3566012B2 - Absorbent articles - Google Patents

Absorbent articles Download PDF

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Publication number
JP3566012B2
JP3566012B2 JP01364797A JP1364797A JP3566012B2 JP 3566012 B2 JP3566012 B2 JP 3566012B2 JP 01364797 A JP01364797 A JP 01364797A JP 1364797 A JP1364797 A JP 1364797A JP 3566012 B2 JP3566012 B2 JP 3566012B2
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JP
Japan
Prior art keywords
sanitary napkin
absorbent article
groove
edge
dimensional groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP01364797A
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Japanese (ja)
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JPH10201788A (en
Inventor
稔 中西
美次 濱島
哲也 草川
泰生 豊島
幸 近藤
Original Assignee
花王株式会社
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Priority to JP01364797A priority Critical patent/JP3566012B2/en
Publication of JPH10201788A publication Critical patent/JPH10201788A/en
Application granted granted Critical
Publication of JP3566012B2 publication Critical patent/JP3566012B2/en
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Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an absorbent article such as a sanitary napkin or an incontinence pad, and more particularly to an absorbent article having excellent leakproofness.
[0002]
Problems to be solved by the prior art and the invention
2. Description of the Related Art Various absorbent articles, such as sanitary napkins, incontinence pads, panty liners, and disposable diapers, which are attached to a human crotch and absorb body fluid have been proposed. Such an absorbent article is liable to leak at a rear portion arranged behind the wearer at the time of wearing at night or the like.
[0003]
Therefore, conventionally, as a technique for fitting the rear part of the absorbent article to the wearer well and avoiding leakage at the rear part, there is a technique described in Japanese Utility Model Laid-Open No. 58-13225 and Japanese Utility Model Publication No. 63-44034. The technology described in the gazette has been proposed. In the technique described in Japanese Utility Model Laid-Open Publication No. 58-13225, a slit is provided at the center in the width direction of the rear part of the absorbent body of the absorbent article, the slit reaching the edge of the rear part of the absorbent body. In addition, in the technique described in Japanese Utility Model Publication No. 63-44034, when the absorbent article is worn, the absorbent article is placed at one point at the center in the width direction on the skin contact surface side of the rear part arranged behind the wearer. A three-dimensional groove extending in the longitudinal direction of the article and a three-dimensional groove extending from the one point to the left and right side edges and extending to the rear edge are provided.
[0004]
However, even in the technique described above, there is a case where leakage from the rear part occurs without obtaining sufficient fitting properties.
In addition, since the three-dimensional groove and the slit are formed so as to reach the edge of the rear part, there is a possibility that bodily fluid may easily leak from the edge of the rear part along the three-dimensional groove and the slit.
Further, in the technology described in Japanese Utility Model Application Laid-Open No. 58-13225, the slit is provided only in the absorber, so that the topsheet floats up from the absorber and the body fluid is not absorbed by the absorber and passes over the topsheet. There is a risk of leaking along.
[0005]
Accordingly, it is an object of the present invention to provide an absorbent article having a predetermined shape with excellent fit at the time of mounting and having excellent leakage prevention.
[0006]
[Means for Solving the Problems]
The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that an absorbent article provided with a specific arrangement of three-dimensional grooves having a specific shape can achieve the above object.
[0007]
The present invention has been made based on the above findings, and has a liquid-permeable skin-contacting surface, a liquid-impermeable non-skin-contacting surface, and an interposition between the skin-contacting surface and the non-skin-contacting surface. And a substantially vertically elongated absorbent article, wherein the skin contact extends from a central portion in the longitudinal direction of the absorbent article to a rear portion arranged behind the wearer when worn. the contact surface, the three-dimensional groove proximate the side edge of said rearward portion gets closer to the edge of said rearward portion is formed, the three-dimensional groove is spaced from the end edge and the side edges In addition, the present invention provides an absorbent article characterized by having a convex portion which is convex toward the front in the central portion in the longitudinal direction .
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first embodiment of the absorbent article of the present invention will be specifically described with reference to the drawings.
FIG. 1 is a perspective view showing a sanitary napkin as a first embodiment of the absorbent article of the present invention, and FIG. 2 is a plan view showing the sanitary napkin shown in FIG.
[0009]
As shown in FIG. 1 and FIG. 2, the absorbent article (sanitary napkin) 1 of the present embodiment has a liquid-permeable skin contact surface 2, a liquid impermeable non-skin contact surface, It is provided with an abutting surface and an absorbing portion 3 interposed between the non-skin abutting surfaces, and is formed substantially vertically long.
[0010]
More specifically, the skin contact surface 2 is formed by a liquid-permeable top sheet 20, and the non-skin contact surface is formed by a liquid-impermeable back sheet. The top sheet 20 and the back sheet are fixed at least at the front and rear edges of the absorbent article.
[0011]
The left and right side edges of the top sheet 20 and the back sheet extend outward in the width direction, and wings 40, 40 are formed. The surfaces of the back sheets of the wings 40, 40 are coated with an adhesive to form gap stoppers 41, 41. The gap stoppers 41, 41 are protected by release paper (not shown). I have.
[0012]
About these structures, it is the same as the conventional absorbent article, As a forming material of the said top sheet 20 and the said back sheet, and the adhesive agent which forms the said slip prevention parts 41 and 41, a well-known thing is especially used. It can be used without limitation.
[0013]
Thus, the sanitary napkin 1 according to the present embodiment, as shown in FIGS. 1 and 2, extends from the longitudinal central portion 1 c of the sanitary napkin 1 to the rear portion 1 b disposed behind the wearer at the time of wearing. A three-dimensional groove 50 is formed near the side edge 1e of the rear portion 1b as approaching the edge 1d of the rear portion 1b. The three-dimensional groove 50 is separated from the edge 1d and the side edge 1e. Are located.
[0014]
More specifically, in the sanitary napkin 1 of the present embodiment, the three-dimensional groove 50 is formed bilaterally symmetrically, and has a convex portion that projects forward in the central portion 1c in the longitudinal direction. Have. In addition, the three-dimensional groove 50 is formed in an arcuate shape curved inward in the width direction of the sanitary napkin 1 behind the convex portion, and curves greatly as approaching the end edge 1d. As it approaches the edge, it is arranged away from the edge 1d and the edge 1e while approaching the side edge of the rear part.
The convex portion is preferably a radius of curvature r 1 is formed so as to be 5 to 20 mm. If the radius of curvature r 1 is less than 5 mm, the inside of the convex portion is not sufficiently raised to fit the buttocks, which is not preferable. If it exceeds 20 mm, the width of the raised portion is too wide to fit the buttocks, which is not preferable. .
In this manner, the three-dimensional structure provided with the convex part which is convex toward the front in the longitudinal central part 1c from the central part in the longitudinal direction of the absorbent article to the rear part arranged behind the wearer at the time of wearing. By forming the groove 50, the rear part is deformed by using the three-dimensional groove 50 as a flexible axis at the time of mounting, the inner side of the three-dimensional groove is raised, and it fits more in the shape of the buttocks, so menstrual blood flowing on the surface is blocked. In addition, since the absorbent article is quickly absorbed without passing through the body, it is possible to provide an absorbent article that is less likely to leak backward.
[0015]
The distance L 2 between the rear end 50b, 50b and the edge 1d of the sanitary napkin 1 of the three-dimensional groove 50 has a 10 to 50 mm, the rear end 50b of the three-dimensional grooves 50, 50b and the side edge 1e, The distance L3 from 1e is 5 to 30 mm. The three-dimensional groove 50 has a function of blocking menstrual blood flowing on the surface in addition to a function as a flexible shaft for facilitating the bulging and deformation of the absorbent article, and L 2 is less than 10 mm and L 3 is less than 5 mm. If this happens, menstrual blood flowing out of the groove may leak out of the absorbent article as it is, which is not preferable.
The three-dimensional groove 50 has a smaller radius of curvature in the vicinity of the rear ends 50b, 50b than immediately behind the protruding portion, that is, in the vicinity of the rear ends 50b, 50b, abruptly inclines toward the side edges 1e, 1e. Thus, for example, it is preferable that the radius of curvature immediately after the convex portion is 100 mm or more, and the radius of curvature near the rear ends 50b, 50b is 30 to 100 mm.
By forming the three-dimensional groove 50 having such a curvature at such a position, a more ideal mounting form can be obtained, and the rear part of the sanitary napkin 1 can be fitted to the buttocks more widely. .
[0016]
In the sanitary napkin 1 of the present embodiment, the excretory portion abuts on the wearer's bodily fluid excretion portion when worn from the front portion 1a to the central portion 1c. Central grooves 60, 60 are formed in two parts symmetrically in the left and right parts, so that the front part 1a and the center part 1c of the sanitary napkin 1 always form an arched cross section when worn, so that they can be fitted well to the crotch. It has become.
[0017]
A pair of said central grooves 60, 60 are formed in an arc shape symmetrically convex toward the inner side in the width direction of the sanitary napkin 1 in a plan view. The distance W1 between the innermost portions of these central grooves 60, 60 in the width direction of the sanitary napkin 1 is 20 to 50 mm.
[0018]
The three-dimensional groove 50 and the central grooves 60, 60 preferably have a depth D of 1 to 10 mm, more preferably 3 to 8 mm. When the depth D of the three-dimensional groove 50 and the central grooves 60, 60 is less than 1 mm, it is difficult to obtain flexibility in the groove portion, and it is difficult to obtain a favorable fit, and it is difficult to obtain an effect of blocking a bodily fluid flowing on the surface. On the other hand, if it exceeds 10 mm, the wearer feels uncomfortable and is not preferable.
The ratio T 1 / T 2 of the thickness T 1 of the portion of the sanitary napkin 1 where the three-dimensional groove 50 and the central grooves 60 and 60 are formed to the thickness T 2 of the portion where the groove is not formed. Is preferably 0.05 to 0.7, more preferably 0.1 to 0.5.
When T 1 / T 2 is less than 0.05, a sanitary napkin having a preferable thickness T 2 as the sanitary napkin 1 (the thickness T 2 of the sanitary napkin 1 is preferably 1.5 to 15 mm, more preferably 2 to 10 mm. In the case where the three-dimensional groove 50 and the central groove 60 are formed by pressing, the three-dimensional groove 50 and the central grooves 60 and 60 may be too hard, impairing the fitting property. Since the groove is too shallow, the desired flexibility cannot be obtained in the groove portion, and the effect of blocking the body fluid is difficult to obtain, which is not preferable.
[0019]
Hereinafter, a preferred groove structure of the three-dimensional groove 50 and the central grooves 60, 60 will be described.
As shown in FIGS. 3 and 4, the three-dimensional groove 50 and the central grooves 60 are formed by discontinuously forming a plurality of diamond-shaped small grooves 50d along the predetermined shape from the skin contact surface 2 side. The small grooves 50d are formed at two levels of depth that are continuously recessed from the skin contact surface 2 between the small grooves 50d. As described above, the gap between the small groove 50d and the small groove 50d is continuously depressed from the skin contact surface 2 so as to be formed in two depths. It is possible to maintain high flexibility and obtain good fit. It is preferable that the size of the small groove 50d is 1 to 100 mm 2 . If it is smaller than 1 mm 2, the effect of blocking the body fluid is small, and if it exceeds 100 mm 2 , favorable flexibility cannot be obtained. The pitch of each small groove 50d is preferably 0.5 to 5 mm. If it is less than 0.5 mm, favorable flexibility and skin contact properties cannot be obtained, and if it is more than 5 mm, a portion that does not dent between the small grooves 50 d is generated, and the leakage prevention effect is reduced.
Further, in the groove processing for discontinuous forming small grooves 50d, of the sanitary napkin 1, the thickness T 3 between the small groove 50d, the ratio T 3 / T 2 with respect to the second thickness T 2 at the portion not formed grooves From the viewpoint of the effect of blocking body fluids and the feeling of wearing, 0.2 to 0.8 is preferable, and 0.3 to 0.6 is more preferable.
Further, the ratio T 1 / T 3 of the thickness T 1 of the portion of the sanitary napkin 1 where the small grooves 50 d are formed to the thickness T 3 between the small grooves 50 d is 0 from the viewpoint of the effect of blocking body fluids and the feeling of wearing. 0.1 to 0.8 is preferable, and 0.3 to 0.7 is more preferable.
The groove processing is performed by pressing an embossing roll having a rhombus-shaped embossed convex portion at a predetermined temperature on a sanitary napkin having no groove in a known manner from the skin contact surface side to heat and compress the sanitary napkin in the thickness direction. Things.
[0020]
The material constituting the absorbing part 3, the sanitary thickness T 2 of the napkin 1 is formed if so as to be 1.5 to 15 mm, conventional fluff pulp, absorbent paper, such as superabsorbent polymer material Can be used without any particular limitation, but those containing at least the absorbent sheet 30 containing a thermoplastic fiber having a thickness of 0.3 to 5 mm, preferably 0.3 to 3 mm include the three-dimensional groove 50 and the central grooves 60 and 60. Is preferred in that it is formed and maintained in a more stable state.
If the thickness of the absorbent sheet 30 is less than 0.3 mm, the rigidity of the sheet itself is too small to form and maintain a desirable arch form between the central grooves 60, and if it exceeds 5 mm, The seat stiffness becomes too high or the thickness of the sanitary napkin 1 becomes too thick, so that a feeling of strangeness at the time of wearing is increased.
When the thermoplastic fibers are bonded to each other in the absorbent sheet 30, the thermoplastic fibers keep the shape of the absorbent sheet 30 stable when absorbing the bodily fluid, so that the preferable mounting form of the sanitary napkin 1 is improved. It is preferable to maintain the sanitary napkin 1 without releasing, and to restore the original state when the pressure is released, and to keep the sanitary napkin 1 stable without twisting.
[0021]
The thermoplastic fiber is not particularly limited as long as the fibers adhere to each other by heating, and specific examples thereof include polyethylene, polypropylene, polyester fiber, polyethylene-polyester composite fiber, and polypropylene-polyester composite fiber. Is preferably used. Further, polyvinyl alcohol fibers or the like in which the fibers are bonded to each other by dissolving in hot water and drying can also be preferably used.
[0022]
The absorbent sheet 30 may be formed of only the thermoplastic fibers, but may be a mixture of hydrophilic fibers such as flap pulp and rayon, or a known highly absorbent polymer. When these are mixed and used, the blending amount of the thermoplastic fiber is preferably set to 1 to 30% by weight based on the entire absorbent sheet 30.
[0023]
Further, the absorbent sheet 30 may constitute the absorbent section 3 by itself, but may be used in combination with another absorbent sheet 30, a highly absorbent polymer, or another absorbent member. In the case where another absorbing sheet 30 or the like is used in combination, the thickness of the absorbing section 3 is preferably 1.5 to 15 mm.
[0024]
The sanitary napkin 1 of the present embodiment is worn and used by arranging it from the front part 1a to the center part 1c between the crotch like a normal sanitary napkin.
At the time of mounting, a force in the width direction is applied from the side to the front part 1a from the center part 1c. Therefore, the front part 1a and the center part 1c of the sanitary napkin 1 are bent at the center grooves 60, 60 and the three-dimensional groove 50, and the cross-section arch in which the space between the center grooves 60, 60 and the three-dimensional groove 50 is raised toward the skin contact surface side. As a result, it is satisfactorily brought into contact with the wearer's crotch.
In the rear part 1b of the sanitary napkin 1, the three-dimensional groove 50 is in contact with the buttocks. Therefore, the rear part 1b of the sanitary napkin 1 is bent in the three-dimensional groove 50, and the outer side of the three-dimensional groove 50 is gently raised toward the skin contact surface along the buttocks of the wearer.
The shape of the sanitary napkin 1 at the time of this mounting is guided and formed by the three-dimensional groove 50, so that it can be favorably maintained regardless of the mounting state.
[0025]
As described above, according to the sanitary napkin 1 of the present embodiment, in the central portion 1c, the inside of the three-dimensional groove 50 protrudes toward the skin contact surface side and is mounted in a shape that is well suited to the wearer, and a good fit is achieved. In the rear portion 1b, the outer side of the three-dimensional groove 50 is bent toward the skin contact surface side and spreads along the buttocks of the wearer while gently rising to the skin contact surface side. Also in 1b, a good fit is exhibited, and leakage is effectively avoided.
According to the sanitary napkin 1 of the present embodiment, the convex portion of the three-dimensional groove 50 has a radius of curvature r 1 of 5 to 20 mm, so that the inside of the convex portion is appropriately raised at the time of mounting, so that a better fit is achieved. The character is exhibited.
According to the sanitary napkin 1 of the present embodiment, since the three-dimensional groove 50 is not provided at the end edge 1d of the rear part 1b, the space between the three-dimensional grooves is unlikely to protrude at the rear end 50b of the sanitary napkin 1. It is held substantially flat and spreads along the buttocks of the wearer, and leakage at the rear portion 1b is particularly effectively avoided.
[0026]
According to the sanitary napkin 1 of the present embodiment, since the three-dimensional groove 50 is not provided at the edge 1d and the side edge 1e of the rear portion 1b, the excreted body fluid leaks from the edge 1d and the side edge 1e. It is hard to come out, and leakage at the rear portion 1b is well avoided.
According to the sanitary napkin 1 of the present embodiment, since the three-dimensional groove 50 is formed by performing groove processing on both the topsheet 20 and the absorber, the topsheet 20 does not rise from the absorber, and bodily fluid is removed. There is no leakage from the topsheet 20.
According to the sanitary napkin 1 of the present embodiment, since the three-dimensional groove 50 is formed on the skin contact surface 2 side, the space between the three-dimensional grooves 50 easily rises toward the skin contact surface side, and the sanitary napkin 1 is placed between the crotch. Fits easily.
According to the sanitary napkin 1 of the present embodiment, since the three-dimensional groove 50 is formed by discontinuously connecting a plurality of small grooves, good flexibility is secured in the longitudinal direction, and a better fit is achieved. It is possible to avoid back leakage and front leakage depending on the sex.
[0027]
The sanitary napkin 1 of the present embodiment is manufactured by manufacturing a sanitary napkin without a groove by a generally known method, and then compressing the sanitary napkin along the longitudinal direction of the sanitary napkin with an embossing roll or the like (heating if necessary). (Compression) to form the small grooves, thereby easily forming the three-dimensional grooves.
[0032]
In addition, the absorbent article of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
[0034]
Further, the three-dimensional groove may not be one in which the small grooves are connected as described above, but may be a three-dimensional groove that is continuously processed. Further, when formed by a plurality of discontinuous small grooves divided in the longitudinal direction as in the above-described embodiment, the shape of the small grooves is not particularly limited.
The three-dimensional groove can be formed by groove processing from the non-skin contact surface side. However, in order to easily raise between the three-dimensional grooves and obtain good fit, groove processing from the skin contact surface side is required. Is preferably formed.
The absorbent article may be a sanitary napkin, a pad for incontinent persons, a vaginal sheet, or the like.
[0035]
【The invention's effect】
As described above, the absorbent article of the present invention has a predetermined shape with excellent fit at the time of wearing, and is excellent in leak prevention.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of a sanitary napkin as an absorbent article according to the present invention, as viewed from a skin contact surface side.
FIG. 2 is a plan view showing the sanitary napkin of FIG. 1 from a non-skin contact surface side.
FIG. 3 is an enlarged plan view of a main part showing the sanitary napkin of FIG. 1;
FIG. 4 is a sectional view taken along line II of FIG. 3;
[Explanation of symbols]
1 sanitary napkins (absorbent articles)
1a Front part 1b Back part 1c Central part 1d Edge 1e Side edge 2 Skin contact surface 3 Absorbing part 20 Top sheet 30 Absorbing sheet 40 Wing 41 Slip stopper 50 Solid groove 50b Rear end 60 Central groove

Claims (3)

  1. A liquid-permeable skin-contacting surface, a liquid-impermeable non-skin-contacting surface, and an absorbing portion interposed between the skin-contacting surface and the non-skin-contacting surface, and are substantially vertically elongated. In the absorbent article formed,
    From the central portion in the longitudinal direction of the absorbent article to the rear portion arranged behind the wearer at the time of wearing, the skin contact surface is closer to the side edge of the rear portion as approaching the edge of the rear portion. A three-dimensional groove is formed,
    The absorbent article, wherein the three-dimensional groove is disposed apart from the end edge and the side edge, and has a convex portion protruding forward at the central portion in the longitudinal direction .
  2. The three-dimensional groove, absorbent article according to claim 1, wherein the curvature of the upper Kitotsu shaped portion with a radius of 5 to 20 mm.
  3. On the skin contact surface of the excretory part abutment part which is in contact with the body fluid excretion part of the wearer at the time of wearing, it has a pair of central grooves formed in the longitudinal direction of the absorbent article. The absorbent article according to claim 1 or 2, wherein
JP01364797A 1997-01-28 1997-01-28 Absorbent articles Expired - Fee Related JP3566012B2 (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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JPH10201788A JPH10201788A (en) 1998-08-04
JP3566012B2 true JP3566012B2 (en) 2004-09-15

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US9649232B2 (en) 2011-06-10 2017-05-16 The Procter & Gamble Company Disposable diaper having reduced absorbent core to backsheet gluing
US9668926B2 (en) 2011-06-10 2017-06-06 The Procter & Gamble Company Method and apparatus for making absorbent structures with absorbent material
US9713556B2 (en) 2012-12-10 2017-07-25 The Procter & Gamble Company Absorbent core with high superabsorbent material content
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