JP4359020B2 - Sanitary napkin - Google Patents

Description

【００３６】
【発明の効果】
以上のとおり本発明によれば、エンボス凹部による体液拡散抑制形態を採用できるものでありながら、粘着剤がショーツに移り難いフラップ部を有する生理用ナプキンとなる。さらに、フラップ部のコシをエンボス加工特性・加工形態により調節したことにより、装着者においてフラップ部との擦れによって違和感をおぼえたり、フラップ部と擦れる部位にカブレが発生したりし難くなる。
【図面の簡単な説明】
【図１】 本発明に係る生理用ナプキンの展開態における平面（体液吸収側面）図である。
【図２】 本発明に係る生理用ナプキンの展開態における底面（裏面若しくは外装面）図である。
【図３】 図１のIII−III断面図である。
【図４】 他の形態を示す断面図である。
【図５】 別の形態を示す断面図である。
【符号の説明】
１…生理用ナプキン、２…不透液性裏面シート、３…透液性トップシート、４…吸収コア、５…クレープ紙、６…サイドシート、Ｆ１…折返しフラップ部、Ｆ２…ヒップカバーフラップ部、ｅｂ…エンボス凹部。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sanitary napkin having a main body portion having a body fluid absorbing portion and a flap portion provided around the main body portion.
[0002]
[Prior art]
The flap part of this type of absorbent article is suitable for a type that folds back to the outer surface of the shorts (hereinafter also referred to as a folded flap part), as well as for sanitary napkins, and for sanitary napkins and paper diapers for a long time. As shown, it is not folded back to the outside of the shorts but is used so as to be in contact with the skin surface and to receive leakage of bodily fluid around the main body (hereinafter also referred to as a cover flap) There is. Both are clearly distinguished conceptually and functionally. That is, the former has a main function of fixing an article to shorts, and the latter has a main function of preventing body fluid leaking from the main body from moving to clothes such as shorts. Usually, a pressure-sensitive adhesive layer is formed on the back surface (exterior surface) of these flap portions to prevent displacement.
[0003]
By the way, the present applicant provides a liquid stop recess by embossing or the like on the skin side surface of the cover flap portion, so that even if body fluid leaks from the main body portion onto the cover flap portion, it is formed on the surface of the cover flap portion. It was discovered that diffusion of body fluid can be suppressed by the liquid stop recess.
[0004]
[Problems to be solved by the invention]
However, if embossing is applied to the cover flap part, unevenness is formed on both the front and back surfaces. As a result, even if an adhesive layer is provided on the uneven surface, the contact area between the adhesive layer and the back surface of the flap part There is a problem that the pressure-sensitive adhesive is held in a state where it floats on the surface of the flap portion, and the pressure-sensitive adhesive moves to the shorts.
[0005]
Also, if the embossing process is applied to the flap, it becomes harder than necessary, and if the wearer wears it, the feeling of discomfort will be felt due to the friction between the skin and the flap, or the part that rubs against the flap will be blurred There was also a problem of doing.
[0006]
Then, the main subject of this invention is providing the sanitary napkin which has a flap part to which an adhesive is hard to move to shorts, although the bodily fluid diffusion suppression form by an embossing recessed part can be employ | adopted. Another object is to provide a sanitary napkin having a flap portion that is less likely to cause problems such as discomfort and fogging.
[0007]
[Means for Solving the Problems]
The present invention that has solved the above problems includes a liquid-impervious back sheet, a liquid-permeable top sheet, an absorbent body interposed in the center in the width direction between the two sheets, and the liquid-impervious back sheet at the hip portion. The cover flap portion is formed by laminating and bonding the skin side surface layer made of nonwoven fabric so that both side portions of the absorbent body extend laterally from both side edges of the absorbent body and cover the entire surface side of the extended portion. A sanitary napkin comprising:
The cover flap portion is extended so as to be in contact with the skin surface at least in use and receiving body fluid leakage around the main body portion having the absorber, and is not folded back to the outside of the shorts.
In the surface of the skin side surface layer in the flap portion, a first embossed recess row along a direction not parallel to the product longitudinal direction and the width direction, and a direction intersecting with the first embossed recess row And a lot of 2nd embossed crevice rows along a direction non-parallel to the product longitudinal direction and the width direction are formed in parallel at predetermined intervals, respectively.
Wherein each of the first embossed depressions column and second embossed concave portion rows, depth 0.01mm or more, and the opening width 0.7mm or more embossed depression is formed by intermittently arrayed in the following mutual distance 5mm Is ,
Area ratio of the embossed depressions with respect to the flap portion is from 5 to 80%
The back surface of the flap part has substantially no irregularities,
An adhesive layer is provided on the back surface of the flap portion,
This is a sanitary napkin characterized by the above.
[0008]
With such a configuration, the back surface of the flap portion is substantially free of unevenness, so that the adhesive layer is securely adhered to the back surface, and even when the surface of the adhesive layer is adhered to the shorts, the adhesive layer is adhered upon removal. It is difficult for a part of the agent to move to the shorts (remain).
[0009]
On the other hand, when embossing is given to the flap portion, the stiffness of the flap becomes stronger than necessary, and there is a possibility that problems such as uncomfortable feeling and fogging may occur in the wearer. However, as a result of intensive studies by the present inventors, this problem can be solved by employing embossing that satisfies the following requirements (a), (b), and (d). Furthermore, it is preferable that at least one of the requirements (c) and (e) is satisfied.
(A) The area ratio of the embossed concave portion with respect to the flap portion is set to 5 to 80%.
(B) The depth of the embossed recess is 0.01 mm or more.
(C) In the flap part, the skin side surface layer is a nonwoven fabric, the liquid-impermeable back sheet is a polyethylene sheet, and the average bending rigidity of the flap part is 0.03 to 0.10 gcm ² / cm. ing.
(D) The opening width of the embossed recess is 0.7 mm or more.
(E) A large number of the embossed concave portions are formed with different number densities in the planar direction of the flap portion.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to application examples to sanitary napkins shown in the accompanying drawings.
FIG. 1 shows a body fluid absorption side surface of the sanitary napkin 1 according to the present invention in a deployed state, FIG. 2 shows the opposite surface, that is, the exterior surface, and FIG. 3 shows a cross section taken along line III-III in FIG. Show. This sanitary napkin 1 has a liquid-impervious back sheet 2 made of a polyethylene sheet, a polypropylene sheet, and the like, and a liquid-permeable top sheet 3 that allows menstrual blood, urine and the like to permeate quickly. At the center in the width direction between the two sheets 2 and 3, an absorbent core 4 made of cotton-like pulp or synthetic pulp, and crepe paper that wraps the absorbent core 4 in order to maintain the shape of the absorbent core 4 and improve diffusibility. 5 is interposed. The product center portion exhibiting this absorption function constitutes the main body of the present invention.
[0011]
In the present embodiment, the liquid-permeable top sheet 3 has a shape obtained by slightly scaling up the absorber AB, and is disposed so as to cover the entire surface of the absorber AB. The liquid-impermeable back sheet 2 has the same shape as the planar shape of the product, and both side portions thereof are extended to the side of both side edges of the absorber AB, and the entire surface side of this extended portion The side sheets 6 and 6 made of nonwoven fabric are laminated and bonded so as to cover the surface. As this joining method, bonding with a hot melt adhesive, ultrasonic sealing, thermal fusion, thermocompression bonding, or a combination thereof can be employed.
[0012]
In particular, as shown in the figure, the peripheral edge of the product, specifically, the free edge of the laminated portion of the back sheet 2 and the side sheets 6 and 6, and the front and rear ends of the liquid-permeable top sheet 3 and the liquid-impervious back sheet 2 The edges are preferably joined firmly by heat sealing b1, b2. It is desirable to secure a width of the joining edge of at least 2 mm or more and less than 10 mm. In the illustrated embodiment, the former heat seal b <b> 1 is configured so that no irregularities appear on the skin surface side.
[0013]
In the present embodiment, the crotch portion and the hip portion of the laminated portion of the liquid-impervious back sheet 2 and the side sheets 6 and 6 are greatly extended to the side of the absorber AB, and these extended portions A folded flap part F1 and a hip cover flap part F2 are formed. In this invention, the form which provided only any one flap part and the form which applied this invention only to any one flap part can also be taken.
[0014]
As shown in FIGS. 2 and 3, an adhesive layer 20 is formed on the back sheet 2 on the back surfaces of the flap portions F <b> 1 and F <b> 2, thereby fixing the shorts. The flap portions F1 and F2 can be folded to the back side of the main body at the product provision stage and can be adhesively fixed to the back of the main body. In this case, the cover flap portion F2 is returned so as to be in contact with the skin surface as described above at least in the use state.
[0015]
And in this embodiment, the side sheets 6 and 6 in which many recessed parts eb by embossing were formed are joined with the back surface sheet 2 which has not performed uneven | corrugated formation processes, such as embossing. Therefore, as is clear from the comparison between FIG. 1 and FIG. 2, the flap portions F1 and F2 have the concave portion eb on the skin surface side surface, but have substantially no unevenness on the opposite surface (back surface). Thus, the pressure-sensitive adhesive layer 20 can be securely held in close contact with the back sheet 2, and a part of the pressure-sensitive adhesive layer 20 remains on the outer surface of the shorts even if it is removed after being adhered to the outer surface of the shorts. Such a situation is less likely to occur.
[0016]
Moreover, since a large number of embossed recesses eb are formed on the surface of the cover flap portion F2, even if the body fluid leaks to the side without being absorbed and held in the main body portion, the body fluid remains in the recess of the cover flap portion F2. Diffusion is suppressed by eb. In addition, although the recessed part eb is eventually formed also in the surface of the folding | turning flap part F1, since the folding | turning flap part F1 is folded outside the shorts, there is almost no body fluid leaking there, and a diffusion suppression function Does not make any substantial sense. However, the recessed part eb may be formed in the folding | returning flap part F1 in this way for the convenience of a manufacturing method.
[0017]
In particular, when the side sheets 6 and 6 are made of a nonwoven fabric as in this embodiment, the body fluid leaking to the side of the main body is diffused by permeating into the side sheet nonwoven fabrics 6 and 6, but this diffusion Is also blocked by the sealing effect by the embossed recess eb. This function is demonstrated regardless of the body fluid viscosity. Moreover, the side sheet nonwoven fabrics 6 and 6 have not only a function of suppressing diffusion of body fluids but also a function of absorbing and retaining body fluids.
[0018]
Furthermore, when the skin side surfaces of the flap portions F1 and F2 are made of non-woven fabric as described above, the skin surface side of the flap portions F1 and F2 is improved, so that the wearer feels uncomfortable by rubbing with the flap portions F1 and F2. In addition, there is an advantage in that it is difficult for fog to occur in a portion that rubs against the flap portions F1 and F2.
[0019]
By the way, the stiffness of the flap portions F1 and F2 has a more serious influence on the problems such as uncomfortable feeling and fogging than the kind of material. In particular, when embossing eb and eb are performed on the skin side surfaces of the flap portions F1 and F2, as described above, the stiffness of the flap portions F1 and F2 tends to be harder than necessary. Therefore, in the present invention, by performing embossing that satisfies the following requirements (A), (B), and (D), the above-mentioned uncomfortable feeling and blurring problem can be achieved while providing a body fluid flow prevention function by embossing. The stiffness of the flap portions F1, F2 is adjusted to such an extent that it is reduced or eliminated. Furthermore, it is preferable that at least one of the requirements (C) and (E) is satisfied.
(A) The area ratio of the embossed recesses with respect to the flap portions F1 and F2 is 5 to 80%, preferably 10 to 30%.
(B) The depth of the embossed recess is 0.01 mm or more, preferably 0.03 mm or more.
(C) The flap portions F1 and F2 are formed by laminating a nonwoven fabric and a polyethylene sheet, and embossing is applied so that the average bending rigidity is 0.03 to 0.10 gcm ² / cm.
(D) The opening width of the embossed recess is 0.7 mm or more.
(E) The density of the embossed concave portions is changed in the plane direction of the flap portions F1 and F2. For example, in the vicinity of the folding line of the folding flap portion F1, the number of embossed recesses is relatively reduced and the stiffness is reduced.
[0020]
On the other hand, the structure and materials of the sanitary napkin 1 shown in the figure will be described in more detail. The skin side surfaces of the flap portions F1, F2 are preferably formed of non-woven fabric as described above, but like a polyethylene sheet, It can also be formed from a liquid permeable or liquid impermeable sheet of other materials used in this type of field. That is, in the illustrated form, not only the back sheet 2 but also the side sheet 6 can be formed of a liquid-impermeable sheet.
[0021]
In particular, when the side sheets 6 and 6 are non-woven fabrics, a bulky non-woven fabric such as an air-through non-woven fabric is desirable for the reasons described above. As this non-woven fabric, a water-repellent treated non-woven fabric or a hydrophilic treated non-woven fabric can be used alone or in combination depending on the function regarded as important. For example, if importance is placed on functions such as preventing permeation of menstrual blood or vaginal discharge, or enhancing the touch feeling, water repellent treatment coated with silicon, paraffin or alkylchromic chloride water repellent If the nonwoven fabric is used and the absorption of menstrual blood and the like in the flap portion is important, a method of polymerizing a compound having a hydrophilic group, such as an oxidation product of polyethylene glycol, in the synthetic fiber manufacturing process, 2 Treated with a metal salt such as tin, partially swelled the surface to make it porous, and made the synthetic fiber swelled or made porous by applying a metal hydroxide, etc., and applied capillary action to make it hydrophilic Use a hydrophilic nonwoven fabric. However, in this invention, it is desirable to use a hydrophilic treatment nonwoven fabric as a nonwoven fabric used for the side sheet 6 from the above-mentioned viewpoint. As such a non-woven fabric, natural fibers, synthetic fibers or regenerated fibers can be used as raw materials, and those formed by an appropriate processing method can be used. It is good to use.
[0022]
The emboss pattern to be applied to the skin side surfaces of the flap portions F1 and F2 has a large number of recesses arranged intermittently as shown in the figure. Moreover, although it is preferable from the surface of the touch that the periphery of the embossed recessed part eb is a curve which does not have a corner, it may have a corner. As shown in the figure, an emboss pattern obtained by combining emboss recesses eb having different shapes can be used, or an emboss pattern can be formed using only emboss recesses having the same shape.
[0023]
Viewpoint et of preventing the diffusion of the body fluid, the embossed depressions eb As illustrated form is arranged along the non-parallel direction to the product longitudinal direction and the width direction. It is preferable that the embossed recess eb has a shape extending along the non-parallel direction. In particular, as shown in the drawing, a configuration in which the arrangement directions of the recesses (or the grooves when the recesses extend in a groove shape) intersect each other is preferable. Furthermore, the perspective et of preventing the diffusion of the body fluids, spacing of embossed depression eb is 5mm or less, preferably to less than 3mm.
[0024]
On the other hand, the liquid-impervious back sheet 2 is a sheet material having at least water shielding properties such as an olefin resin sheet such as polyethylene or polypropylene, but in addition to this, a laminated nonwoven fabric in which a nonwoven fabric is laminated on a polyethylene sheet or the like, Furthermore, a non-woven fabric sheet having a substantially impervious property with a waterproof film interposed therebetween (in this case, the waterproof film and the non-woven fabric constitute a liquid-impervious back sheet) can be used. In recent years, those having moisture permeability tend to be used from the viewpoint of preventing stuffiness. The water- and moisture-permeable sheet material is a microporous sheet obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. There is.
[0025]
As the liquid-permeable top sheet 3, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. Examples of the material fibers constituting the nonwoven fabric include synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a lace method, a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Of these processing methods, the spunlace method is excellent in terms of flexibility and drape, and the thermal bond method is excellent in terms of being bulky and soft. Particularly preferred is a porous plastic sheet.
[0026]
Surface embossing (not shown) can be imparted to the liquid-permeable top sheet 3. Moreover, as shown in FIG. 4, the liquid-permeable top sheet 3 is extended to the side of the main body part, and the skin side surface layer of the flap parts F1 and F2 is formed by the extended part, and the side sheet 6 described above is formed. It can be omitted. In this case, the aforementioned embossed recess eb is formed in the laterally extending portion of the liquid-permeable top sheet 3. Of course, by omitting the side sheet 6 and extending the top sheet 3 on the side sheet 6 or between the side sheet 6 and the back sheet 2 or arranging another sheet, the flaps can be obtained. The parts F1 and F2 can also have a three-layer configuration (not shown). Further, as can be seen from this, the flap portions F1 and F2 of the present invention have the number of layers as long as they have an embossed recess on the skin surface side surface and substantially no unevenness on the back surface. It is not limited by the material of the layer.
[0027]
The absorbent core 4 interposed between the liquid-impermeable back sheet 2 and the liquid-permeable top sheet 3 is composed of, for example, fluffy pulp and a water-absorbing polymer. The water-absorbing polymer is mixed as, for example, granular powder in the pulp constituting the absorbent core. Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. It is preferably used in terms of price.
[0028]
Further, an absorption promotion sheet (not shown) made of a thick hydrophilic nonwoven fabric can be disposed between the liquid-permeable top sheet 3 and the absorbent core 4 (specifically, the crepe paper 5). It is desirable that the absorption promoting sheet is located at the center in the longitudinal direction, extends long on the front side, and is unevenly distributed toward the front. By providing such an absorption promoting sheet, menstrual blood, urine, etc. (hereinafter collectively referred to as body fluid) can be quickly absorbed, and the surface in contact with the skin has excellent dry touch properties. It will be a thing.
[0029]
If the crepe paper 5 surrounding the absorbent core 4 is provided as shown in the figure and the crepe paper 5 is interposed between the liquid-permeable top sheet 3 and the absorbent core 4 as a result, the absorbency is improved. The crepe paper 5 which is excellent in diffusing body fluids quickly prevents reversal of menstrual blood and the like. As described above, the crepe paper 5 has a function of diffusing body fluids quickly, and therefore the absorption promoting sheet can be omitted when the crepe paper 5 is provided.
[0030]
On the other hand, in the illustrated embodiment, side grooves 8 and 8 are formed on both sides of the upper surface of the liquid-permeable top sheet 3 so as to straddle the site corresponding to blood removal, and are embossed along the substantially longitudinal direction. Further, a front groove 10F and a back groove 10B are formed by arc-shaped embosses extending in the width direction so as to connect the front and rear end portions. Further, a front leakage prevention groove 11 is formed between the front groove 10F and the longitudinal intermediate portion by arc-shaped emboss extending in the width direction. The longitudinal position and the longitudinal intermediate portion of the front leakage prevention groove 11 are formed. Are formed on the outer sides of the side grooves 8, 8, respectively, with side auxiliary grooves 9, 9 by embossing extending along the side grooves 8, 8. These strip grooves 8, 9, 10F, 10B, and 11 can be formed as so-called heat fusion embossing by embossing while heating from the use surface side in a state where the respective layers of the portions are overlapped.
[0031]
These grooves 8, 9, 10F, 10B, and 11 are for preventing menstrual blood from the blood outlet contact portion from diffusing outward. As long as these strips 8, 9, 10F, 10B, 11 are squeezed in a form in which at least the absorbent core 4 is compressed, there is no limitation on the form of embossing, but the length in the length direction of the strips is high. A pressing part (high density part) and a low pressure part (low density part) can be made into the form which appears alternately.
[0032]
On the other hand, as shown in the figure, it is also preferable to provide side leakage prevention barriers 30, 30 extending in the product longitudinal direction on both sides of the absorbent core 4. In the form shown in FIG. 3, one end in the width direction of the barrier sheet 31 extending in the product longitudinal direction is fixed to the side portion of the absorbent core 4, the other end portion is a free end, and elastic expansion and contraction to the free end side portion. The members 32 are fixed under extension along the longitudinal direction. The front and rear ends of the barrier sheet 31 in the longitudinal direction are joined to each other in a folded state, and are not joined at the intermediate portion. Thus, in the state of use, as shown in FIG. 3, the intermediate portion of the barrier sheet 31, 31 stands up due to the contraction force of the elastic elastic members 32, 32, and functions as a menstrual blood leakage barrier 30, 30.
[0033]
As shown in FIG. 5, the side leakage prevention barriers 30 and 30 extend the inner portions of the side sheets 6 and 6 inward from the side edges of the absorbent core 4, and the extended portions 6e and 6e are connected to the barriers. It can also be formed by using instead of the sheets 31 and 31. As can be seen from this case, the side leakage preventing barriers 30, 30 may have an embossed recess for convenience of the manufacturing method.
[0034]
<Example>
A side sheet material made of an air-through non-woven fabric having a basis weight of 25 g / m ² and a liquid-impermeable back sheet material made of a polyethylene film having a basis weight of 23 g / m ² were prepared, and these were laminated together to give Example 1 and Comparative Example below. Samples 1 and Comparative Example 2 were produced. About each sample, the bending rigidity B and the restoring property 2HB (bending hysteresis width) were measured using the pure bending test machine by Kato Tech. Moreover, the unevenness | corrugation of the non-bonding surface of a liquid-impermeable back sheet material was visually evaluated. The results are shown in Table 1. In addition, the bending rigidity B means that the stiffness is stronger as the value is larger, and the restoring property 2HB means that the restoring property is higher as the value is larger.
Example 1: A side sheet material was embossed to satisfy all of the above requirements (A) to (D), and then bonded to a liquid-impermeable back sheet material.
Comparative Example 1: A side sheet material and a liquid-impervious back sheet material that are bonded together without embossing.
Comparative Example 2: A side sheet material and a liquid-impervious back sheet material were laminated together, and then the laminated sheet was embossed in the same manner as in Example 1.
[0035]
[Table 1]

[0036]
【The invention's effect】
As described above, according to the present invention, a sanitary napkin having a flap portion in which the body fluid diffusion suppression form by the embossed concave portion can be adopted but the adhesive is difficult to transfer to shorts. Further, by adjusting the stiffness of the flap portion according to the embossing characteristics and processing form, it is difficult for the wearer to feel uncomfortable due to rubbing with the flap portion or to cause blurring at a portion rubbing against the flap portion.
[Brief description of the drawings]
FIG. 1 is a plan view (body fluid absorption side view) of a sanitary napkin according to the present invention in an unfolded state.
FIG. 2 is a bottom view (back surface or exterior surface) of the sanitary napkin according to the present invention in a developed state.
3 is a cross-sectional view taken along the line III-III in FIG.
FIG. 4 is a cross-sectional view showing another embodiment.
FIG. 5 is a cross-sectional view showing another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Liquid impervious back sheet, 3 ... Liquid permeable top sheet, 4 ... Absorption core, 5 ... Crepe paper, 6 ... Side sheet, F1 ... Folding flap part, F2 ... Hip cover flap part , Eb ... embossed recess.

Claims (4)

A liquid-impervious back sheet, a liquid-permeable top sheet, an absorbent body interposed in the center in the width direction between the two sheets, and both side portions of the liquid-impervious back sheet on both sides of the absorbent body in the hip portion A sanitary napkin having a cover flap portion formed by laminating and bonding a skin-side surface layer made of a nonwoven fabric so as to cover the entire surface side of the extended portion, and extending sideways from the edge. And
The cover flap portion is extended so as to be in contact with the skin surface at least in use and receiving body fluid leakage around the main body portion having the absorber, and is not folded back to the outside of the shorts.
In the surface of the skin side surface layer in the flap portion, a first embossed recess row along a direction not parallel to the product longitudinal direction and the width direction, and a direction intersecting with the first embossed recess row And a lot of 2nd embossed crevice rows along a direction non-parallel to the product longitudinal direction and the width direction are formed in parallel at predetermined intervals, respectively.
Wherein each of the first embossed depressions column and second embossed concave portion rows, depth 0.01mm or more, and the opening width 0.7mm or more embossed depression is formed by intermittently arrayed in the following mutual distance 5mm Is ,
Area ratio of the embossed depressions with respect to the flap portion is from 5 to 80%
The back surface of the flap part has substantially no irregularities,
An adhesive layer is provided on the back surface of the flap portion,
A sanitary napkin characterized by that. Before Kifu pervious backsheet is polyethylene sheet, the average flexural rigidity of the flap portion is a 0.03~0.10gcm ² / cm, the sanitary napkin of claim 1 wherein. The sanitary napkin according to claim 1 or 2, wherein a large number of the embossed recesses are formed with different number densities in a planar direction of the flap portion. The skin-side surface layer is made of hydrophilic treated nonwoven fabric, a sanitary napkin according to any one of claims 1-3.

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