JP4387066B2 - Sanitary napkin - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sanitary napkin down for absorbing such menstrual blood and textiles.
[0002]
[Prior art]
Conventionally, as a sanitary napkin, as shown in FIG. 9, for example, a liquid-impervious back sheet 50 made of a polyethylene sheet or a polyethylene-laminated non-woven fabric, and a liquid-permeable surface made of a non-woven cloth or a porous plastic sheet or the like A sheet in which an absorbent body 52 made of cotton pulp or the like is interposed between the sheet 51 and the sheet 51 is known.
[0003]
In order to prevent misalignment, this type of sanitary napkin has, for example, one or a plurality of adhesive layers 53, 53 formed on the non-use surface side (outer surface), and an outer side of the napkin body in the longitudinal direction. In some cases, the wing-shaped flaps W, W extending in the direction are integrally formed, and the adhesive layers 54, 54 are provided on the outer surfaces of the wing-shaped flaps W, W. In the product state, a release paper is temporarily attached to each of the adhesive layers 53.
[0004]
As shown in FIG. 10, the structure of the wing-shaped flap W is such that the liquid-impervious back sheet 50 on the non-use surface side is extended outward, and is provided along the longitudinal direction on each of both sides of the surface. A part of the obtained side nonwoven fabric 55 is formed so as to extend outward according to the shape of the wing-shaped flap W and bonded to the liquid-impermeable back sheet 50.
[0005]
When the sanitary napkin is fixed to the underwear, first, the release paper temporarily attached to the non-use surface side is peeled off, and then the sanitary napkin is locally applied and the wing-shaped flap W protruding sideways is applied. , W is taken out from the underwear, and both wing-shaped flaps W, W are folded back by folding lines RL, RL so that the crotch portion of the underwear is wound and adhered to the outer surface of the crotch portion of the underwear (see FIG. 5).
[0006]
[Problems to be solved by the invention]
However, as described above, since the wing-shaped flap W is constituted by the bonded sheet of the liquid-impermeable back sheet 50 made of the side nonwoven fabric 55 and the plastic sheet, when the wing-shaped flap W is folded when worn, the folded portion However, since the wing-like flap W covers the outer surface of the crotch part, the breathability is lost. Furthermore, in particular as shown in Figure 11, the second wing-shaped flaps W _B to the rear position _close, in the case of the night for a sanitary napkin that has a W _B, the second containing a plastic sheet on the outer surface The wing-shaped flaps W _B and W _B are interposed between the body (buttock) and the futon, and there is a problem that it is easy to feel a feeling of roughness or a sense of incongruity.
[0007]
On the other hand, although the sanitary napkin is completely fixed to the underwear by the wing-shaped flap W, there is a problem that it cannot follow the intense movement of the limbs and may feel uncomfortable.
[0008]
Therefore, the main problem of the present invention is to provide a sanitary napkin provided with wing-shaped flaps on both sides, so that the presence of the wing-shaped flaps does not cause discomfort and improves the feel and breathability. An object of the present invention is to provide a sanitary napkin that can sufficiently follow the movement of a body even when firmly fixed to an undergarment by a wing-shaped flap.
[0009]
[Means for Solving the Problems]
As the present invention for solving the above-mentioned problems, an absorbent body is interposed between the liquid-permeable top sheet and the liquid-impervious back sheet, and the side parts protrude laterally for fixing to the underwear. In a sanitary napkin formed with one or more wing-shaped flaps,
The liquid-impermeable back sheet and a position slightly beyond the absorbent side edges and sheet edge at both side portions of the sanitary napkin, respectively along the longitudinal direction on both sides I the surface of the sanitary napkin, and the sanitary napkin The side nonwoven fabric is provided over substantially the entire length of the side nonwoven fabric, and the wing-shaped flap is formed by extending a part of the side nonwoven fabric to the side , and the liquid impermeability over the substantially entire length of the side nonwoven fabric. A sanitary napkin is provided which extends laterally beyond the sheet edges on both sides of the back sheet .
[0010]
In this case, in order to give the wing-shaped flap made of the nonwoven fabric a function sufficient to fix and hold the sanitary napkin on shorts and the like, and to prevent bleeding such as menstrual blood, the wing-shaped flap is used. The side nonwoven fabric to be formed has a weight per unit area of 25 to 50 g / m ² , tear strength: 0.2 kg / 30 mm or more, tensile strength: 2.0 kgf / 30 mm or more, rigidity (JIS L 1093): water repellency having a physical property of 65 mm or more It is desirable to use a nonwoven fabric.
[0011]
Moreover, in order to prevent the pressure-sensitive adhesive from penetrating into the inside of the nonwoven fabric and improve the fixing property to the surface, and to prevent the nonwoven fabric from being delaminated when peeling the release paper, It is desirable to apply a heat embossing process to make a part of the film.
[0012]
Further, when the wing-shaped flap is pulled outside and attached to the underwear at the time of mounting on the shorts, the side nonwoven fabric and the liquid-impermeable back sheet constituting the wing-shaped flap are prevented from peeling off. Therefore, it is desirable that the liquid-impervious back sheet and the side nonwoven fabric be fixed by a linear heat seal along the longitudinal direction at the outer position of the absorber side edge.
[0013]
Further, in order to easily fold the wing-shaped flap outward, it is desirable that the liquid-impermeable back sheet has a structure that does not extend outward beyond the folding line of the wing-shaped flap.
[0014]
In addition, in order to surely prevent side leakage, the side nonwoven fabric has a free edge having a predetermined width that is not bonded to the liquid-permeable surface sheet on the inner side portion, and the longitudinal direction with respect to the free edge. In order to provide a structure in which an elastic elastic member is disposed along the surface and a three-dimensional gather standing on the surface side is formed, or in order to impart moisture permeability, a moisture-permeable film is used as the liquid-impermeable back sheet, etc. These changes can be made arbitrarily.
[0015]
On the other hand, as invention which concerns on a 2nd aspect, while an absorber is interposed between a liquid-permeable surface sheet and a liquid-impermeable back sheet, it protrudes to the side for fixation with respect to underwear at both sides, respectively. In sanitary napkins formed with two or more wing-shaped flaps,
The liquid-impermeable back sheet and a position slightly beyond the absorbent side edges and sheet edge at both side portions of the sanitary napkin, respectively along the longitudinal direction on both sides I the surface of the sanitary napkin, and the sanitary napkin The side woven flap is formed by extending a part of the side non-woven fabric to the side while providing a side non-woven fabric having stretchability along at least the transverse direction over the entire length of the wing, and the wing Both the heat-embossed areas are formed into a film by applying a planar heat embossing process to the area excluding the root of the flaky flap, and both sides of the liquid-impermeable back sheet over almost the entire length of the side nonwoven fabric A sanitary napkin is provided that extends laterally beyond the sheet edge .
[0016]
In this case, in particular, in order to satisfy the napkin fixing and holding function and the deformation following function by the wing-shaped flap, the inner boundary line of the planar heat embossing treatment area is an arc line having a convex shape on the inner side. Is desirable.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[First embodiment]
1 is a development view of a sanitary napkin 1A according to a first embodiment of the present invention, FIG. 2 is a view taken along the line II-II in FIG. 1, and FIG. 3 is a view taken along the line III-III in FIG.
[0018]
The sanitary napkin 1A includes a liquid-impervious back sheet 2 made of a polyethylene sheet, a polypropylene sheet or the like, a liquid-permeable surface sheet 3 that allows permeation of menstrual blood or a cage and the like, and a space between these sheets 2 and 3. An absorbent body 4 made of cotton-like pulp or synthetic pulp intervening in the sheet, crepe paper 5 surrounding the absorbent body 4 for maintaining the shape and improving the diffusibility of the absorbent body 4, and longitudinally on both sides of the surface. It is comprised from the side nonwoven fabrics 6 and 6 formed along the direction, and the outer periphery of the said liquid-impermeable back sheet 2 and the liquid-permeable surface sheet 3 in the upper-lower-end edge in the circumference | surroundings of the said absorber 4 The liquid-impervious back sheet 2 and the support which are joined to each other by an adhesive such as hot melt or an adhesive means such as heat seal and which extend laterally from the absorber 4 at both side edges. And de nonwoven 6 are joined by adhesive means such as adhesive or heat sealing, such as a hot melt.
[0019]
Hereinafter, the structure of the sanitary napkin 1A will be described in detail.
The liquid-impervious back sheet 2 is made of a sheet material having at least water shielding properties, such as a polyethylene sheet. In addition to this, a laminated non-woven fabric obtained by laminating a non-woven fabric on a polyethylene sheet or the like, or a waterproof film is further interposed. In addition, a non-woven fabric sheet (in this case, a water-impermeable back sheet is composed of a waterproof film and a non-woven fabric) can be used after ensuring liquid impermeability. 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 material obtained by melting and kneading an inorganic filler in an olefin-based resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. A sheet is preferably used.
[0020]
Next, as the liquid-permeable surface 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. In the illustrated example, the liquid-permeable surface sheet 3 has a two-layer structure including a porous plastic sheet 3A on the front surface side and a hydrophilic nonwoven fabric 3B on the back surface side.
[0021]
When the two-layered sheet is used as the liquid-permeable surface sheet 3, menstrual blood and urine (hereinafter collectively referred to as body fluid) are quickly absorbed, and the skin and The contact surface has excellent dry touch properties. In this case, as in this example, a crepe paper 5 surrounding the absorbent body 4 is provided, so that the crepe paper 5 is interposed between the liquid-permeable surface sheet 3 and the absorbent body 4 as a result. For example, the crepe paper 5 having excellent absorbability quickly diffuses body fluid and prevents reversal of these menstrual blood.
[0022]
On the other hand, on the upper surface of the liquid-permeable surface sheet 3, side embosses 7 and 7 are formed on both sides of the blood drainage corresponding site, respectively along the substantially longitudinal direction, and arcuate embossing 8 and 8 is formed.
[0023]
The absorbent body 4 interposed between the liquid-impervious back sheet 2 and the liquid-permeable top sheet 3 is made of, for example, fluffy pulp and a water-absorbing polymer. The water-absorbing polymer is mixed in the pulp constituting the absorber as, for example, granular powder. 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.
[0024]
In the sanitary napkin 1A, the liquid-impermeable back sheet 2 has sheet edges 2a and 2a at positions slightly beyond the side edges of the absorbent body 4 on both sides of the sanitary napkin , while the liquid-permeable The width dimension of the top sheet 3 is slightly larger than the width of the absorbent body 4 as shown in the cross-sectional view of FIG. 2, and the liquid-impervious back sheet 2 is positioned beyond the absorbent body 4. Side nonwoven fabrics 6 and 6 are provided on both sides of the glued surface along the longitudinal direction and over substantially the entire length of the sanitary napkin .
[0025]
The side nonwoven fabric 6 is originally provided to prevent body fluid absorbed by the absorbent body 4 from reaching the side edge and then oozing out to the surface side. In the sanitary napkin 1A, In particular, the wing-shaped flap W is formed by extending a part of the side nonwoven fabric 6 laterally. At this time, the liquid-impervious back sheet 2 does not extend outward beyond the fold line RL of the wing-shaped flap W, and the sheet ends 2a and 2a of the liquid-impervious back sheet 2 are wing-shaped. It is desirable that the position be in the vicinity of the folding line RL of the flap W. Thus, by positioning the sheet end 2a of the liquid-impervious back sheet 2 in the vicinity of the fold line RL of the wing-shaped flap W, the difference in stiffness between them, that is, the outer part of the fold line RL is made of a nonwoven fabric. On the other hand, the wing-shaped flap W becomes easy to bend by the difference in rigidity due to the inner portion being composed of the nonwoven fabric and the plastic film.
[0026]
The side nonwoven fabric 6 is coated with a silicon-based, paraffin-based, alkylchromic chloride-based water repellent or the like in accordance with the purpose of preventing menstrual blood, venom, etc. from penetrating or enhancing the feeling of touch. It is configured using a water repellent nonwoven fabric. The side nonwoven fabric 6 can be made of natural fibers, synthetic fibers, regenerated fibers, or the like and formed by an appropriate processing method. Preferably, the side nonwoven fabric 6 is made air permeable with a reduced basis weight. Nonwoven fabric should be used. However, if priority is given to air permeability too much, the strength as a sanitary napkin fixing flap cannot be secured. Specifically, the basis weight is set to 25 to 50 g / m ² and tear strength: 0.2 kg / 30 mm Or more, preferably 0.25 kg / 30 mm or more, tensile strength: 2.0 kgf / 30 mm or more, preferably 2.5 kgf / 30 mm or more, rigidity (JIS L 1096) [JIS 45 ° cantilever method]: 65 mm or more, preferably 70 mm It is desirable to use a nonwoven fabric produced so as to satisfy the above conditions. For the tear strength, the sample was cut to 60 mm x 70 mm, a 30 mm incision was made in the center of the sample, and the stroking tester was used, under the measurement conditions of crosshead speed: 300 mm / min and distance between chucks: 40 mm. This is the tear strength value when the test was conducted. The tensile strength was measured by cutting the sample into 30 mm x 170 mm, using a strograph tester, crosshead speed: 500 mm / min, and distance between chucks: 150 mm It is the tensile strength value when the test is conducted at.
[0027]
By the way, an adhesive layer is formed on the non-use surface side (outer surface) of the liquid-impermeable back sheet 2 by an appropriate application pattern for fixing to the shorts, and also on the outer surface side of the wing-shaped flap W as appropriate. An adhesive layer is formed by the coating pattern (reference numerals 53 and 54 in FIG. 9), and a release paper (not shown) covering these adhesive layers is provided in the unused product state. In this case, when the wing-shaped flap W is a non-woven fabric, the applied pressure-sensitive adhesive penetrates the non-woven fabric and cannot exhibit a predetermined adhesive force. Therefore, as shown in FIG. 4, a planar heat embossing process (cross-hatching area) is applied to the wing-shaped flap W, a part thereof is formed into a film, and an adhesive is applied to the film-forming area 10. To.
[0028]
In use, after peeling off the release paper, as shown in FIG. 5, it is folded back at the fold line RL at the base of the wing-shaped flap W so as to wind the crotch portion of the shorts 30, Although it fastens to the crotch portion of the shorts 30, if the wing-shaped flap W is a non-woven fabric, there is a concern that the non-woven fabric constituting the wing-shaped flap W may cause delamination when the release paper is peeled off. However, the delamination of the nonwoven fabric is prevented at the same time by the film forming treatment.
[0029]
Further, when the sanitary napkin 1A is mounted, when the wing-shaped flap W is pulled and fastened to the crotch portion of the shorts, this tensile force is transmitted from the wing-shaped flap W to the side nonwoven fabric 6, Separation from the liquid-impermeable back sheet 2 may occur. In order to prevent this, the liquid-impermeable back sheet 2 and the side nonwoven fabric 6 are fixed by a linear heat seal 9 along the longitudinal direction at a position outward from the side edge of the absorber. It is desirable that the linear heat seal 9 is formed over a length range of approximately 1/5 or more of the length of the napkin product.
[0030]
On the other hand, as shown in FIG. 2, the inner side of the side nonwoven fabric 6 is disposed to overlap the side edge of the absorbent body 4 by a predetermined width S ₁ , and the inner side is the number of the side edges. The mm width portion S ₂ does not adhere to the liquid-permeable surface sheet 3, and exhibits a certain degree of standing toward the upper side when the wing-shaped flap W is folded back to the opposite side. As a result, even if the viscosity of the liquid-permeable surface sheet 3 may flow on the surface of the liquid-permeable surface sheet 3, the inner side edge portion (the S ₂ portion) that stands up to a certain extent prevents menstrual blood and the like. As a result, side leakage is prevented, and menstrual blood or venom absorbed by the absorbent body 4 due to the water repellency of the side nonwoven fabric 6 does not permeate to the outside from the side of the absorbent body 4 and bleeds. It is designed to prevent sticking out.
[0031]
[Second embodiment]
6 is a development view of the sanitary napkin 1B according to the second embodiment of the present invention, and FIG. 7 is a view taken along the line VII-VII in FIG.
[0032]
Although the basic structure is the same as that of the first embodiment, in the second embodiment, the side nonwoven fabrics 6 ′ and 6 ′ have elastic properties along at least the short direction (width direction of the napkin). The point which uses a nonwoven fabric and the point which the inner side of side nonwoven fabric 6 'stood up the side edge part and formed the three-dimensional gather BS.
[0033]
Hereinafter, only the differences will be described in detail, and the other structures will be denoted by the same reference numerals and description thereof will be omitted.
[0034]
As the side nonwoven fabric 6 ′, a nonwoven fabric having elasticity in at least one direction, specifically, a nonwoven fabric composed of long fibers made of an elastic resin material that is easily reversibly plastically deformed, such as polyurethane, or when stretched In addition, although the fiber diameter of the fiber itself does not change, a non-woven fabric or the like is used in which a zigzag or spiral crimp is formed and stretched by extending the crimp.
[0035]
In this case, if the wing-shaped flap W fixed to the crotch part (crotch part) of the shorts exhibits excessive stretchability, the fixing and holding function of the napkin may be impaired. A region excluding the base portion 13 of the wing-shaped flap W is subjected to a planar heat embossing process (cross-hatching region), and only the heat embossing region is formed into a film (reference numeral 10 region). At this time, the inner boundary line 10a of the planar heat embossing region 10 is preferably an arc-shaped line having a convex shape on the inner side. In other words, the linear heat seal 9 in which the liquid-impermeable back sheet 2 and the side nonwoven fabric 6 ′ are fixed along the longitudinal direction serves as a fixing line for the wing-shaped flap W. With respect to the width direction distance L (hereinafter referred to as the stretchable distance) from 9 to the inner boundary line 10a, the stretchable distance L _S is reduced at the middle portion of the wing-shaped flap W, and the end portion of the wing-shaped flap W ( It is desirable that the inner boundary line 10a of the planar heat embossing treatment region 10 be an arcuate line having a convex shape on the inner side so that the stretchable distance L _L is increased at the front and rear portions.
[0036]
Thus, the middle portion of the small wing-shaped flaps W of the extendable distance L _S is, it becomes to fix hold in position the napkin 1B even with movement of the body, large wing of the extendable distance L _L At the end (front and rear) of the flap W, the napkin 1B is prevented from being displaced in order to exhibit elasticity that follows the movement of the body, and at the same time satisfies the deformation performance sufficiently following the movement of the body. become. Of course, the film forming treatment can also achieve the same point that the pressure-sensitive adhesive can be prevented from penetrating into the nonwoven fabric to improve the fixing property to the surface, and the nonwoven fabric can be prevented from being peeled off when the release paper is peeled off.
[0037]
On the other hand, on the inner side of the side nonwoven fabric 6 ′, as shown in FIG. 7, it has a free edge portion of a predetermined width that is not bonded to the liquid-permeable surface sheet 3, and its tip portion is folded back twice. the folded inside one or a plurality of resilient and elastic members are disposed are two resilient and elastic members 11, 11 in the illustrated example, the product state standing gathers B _S erected on the surface side is formed. The formation of the standing gathers B _S, lateral leakage, such as menstrual blood will be able to prevent more reliably.
[0038]
The example of the sanitary napkin provided with one wing-shaped flap W, W on each side has been described in detail above. However, as shown in FIG. 8, the present invention has the second wing W _B at the rear side position. for night for a sanitary napkin 1C with W _B, it can be applied in exactly the same manner. Since other structures are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted.
[0039]
【The invention's effect】
As described above in detail, according to the present invention, in the sanitary napkin provided with wing-shaped flaps on both sides, the presence of the wing-shaped flaps does not cause discomfort, and the touch feeling and breathability are improved. Become. Moreover, when the said side nonwoven fabric is comprised with an elastic nonwoven fabric, even if it fixes to underwear with a wing, it will be able to fully follow a body movement.
[Brief description of the drawings]
FIG. 1 is a development view of a sanitary napkin 1A according to a first embodiment of the present invention.
FIG. 2 is a view taken along the line II-II in FIG.
FIG. 3 is a view taken along the line III-III in FIG. 1;
FIG. 4 is an enlarged view showing a main part of a film processing procedure for a wing-shaped flap W.
FIG. 5 is a perspective view showing a state of wearing the sanitary napkin 1A.
FIG. 6 is a development view of a sanitary napkin 1B according to a second embodiment of the present invention.
7 is a view taken along arrow VII-VII in FIG. 6;
FIG. 8 is a development view showing another example of the sanitary napkin according to the present invention.
FIG. 9 is a development view of a conventional sanitary napkin.
FIG. 10 is a cross-sectional view thereof.
FIG. 11 is a development view showing another example of a conventional sanitary napkin.
[Explanation of symbols]
1A, 1B ... sanitary napkin, 2 ... liquid-impervious back sheet, 3 ... liquid-permeable top sheet, 3A ... porous plastic sheet, 3B ... hydrophilic nonwoven fabric, 4 ... absorbent, 5 ... crepe paper, 6 ... Side nonwoven fabric, 6 '... stretchable side nonwoven fabric, 7 ... side embossing, 8 ... arc-shaped embossing, 9 ... linear heat seal, 10 ... film-forming region, 11 ... elastic elastic member, RL ... folding line, W ... wing-shaped flap , B _S ... Solid gather

Claims (9)

The absorbent body is interposed between the liquid-permeable top sheet and the liquid-impervious back sheet, and one or more wing-shaped flaps protruding laterally for fixing to the underwear are formed on both sides. In sanitary napkins ,
The liquid-impermeable back sheet and a position slightly beyond the absorbent side edges and sheet edge at both side portions of the sanitary napkin, respectively along the longitudinal direction on both sides I the surface of the sanitary napkin, and the sanitary napkin The side nonwoven fabric is provided over substantially the entire length of the side nonwoven fabric, and the wing-shaped flap is formed by extending a part of the side nonwoven fabric to the side , and the liquid impermeability over the substantially entire length of the side nonwoven fabric. A sanitary napkin characterized by extending laterally beyond the sheet edges on both sides of the back sheet . The side nonwoven fabric forming the wing-shaped flap has a basis weight of 25 to 50 g / m ² , tear strength: 0.2 kg / 30 mm or more, tensile strength: 2.0 kgf / 30 mm or more, and rigidity (JIS L 1096): 65 mm or more. The sanitary napkin according to claim 1, which is a water-repellent nonwoven fabric having physical properties. The sanitary napkin according to any one of claims 1 and 2, wherein a planar heat embossing treatment is applied to the wing-shaped flap to partially form a film. The sanitary napkin according to any one of claims 1 to 3, wherein the liquid-impervious back sheet and the side nonwoven fabric are fixed by a linear heat seal along the longitudinal direction at an outer position of the absorber side edge. The sanitary napkin according to any one of claims 1 to 4, wherein the liquid-impermeable back sheet does not extend outward beyond a fold line of the wing-shaped flap. The side nonwoven fabric has a free edge having a predetermined width that is not bonded to the liquid-permeable surface sheet on the inner side portion, and an elastic elastic member is disposed along the longitudinal direction with respect to the free edge, The sanitary napkin according to any one of claims 1 to 5, wherein a three-dimensional gather standing on the side is formed. The sanitary napkin according to any one of claims 1 to 6, wherein the liquid-impermeable back sheet is a moisture-permeable film. The absorbent body is interposed between the liquid-permeable top sheet and the liquid-impervious back sheet, and one or more wing-shaped flaps protruding laterally for fixing to the underwear are formed on both sides. In sanitary napkins ,
The liquid-impermeable back sheet and a position slightly beyond the absorbent side edges and sheet edge at both side portions of the sanitary napkin, respectively along the longitudinal direction on both sides I the surface of the sanitary napkin, and the sanitary napkin The side woven flap is formed by extending a part of the side non-woven fabric to the side while providing a side non-woven fabric having stretchability along at least the transverse direction over the entire length of the wing, and the wing Both the heat-embossed areas are formed into a film by applying a planar heat embossing process to the area excluding the root of the flaky flap, and both sides of the liquid-impermeable back sheet over almost the entire length of the side nonwoven fabric A sanitary napkin characterized by extending laterally beyond the end of the sheet . The sanitary napkin according to claim 8, wherein an inner boundary line of the planar heat embossing region is an arc line having a convex shape on the inner side.

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