JP5968631B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article having a wing-shaped flap that is used so as to be wound around the crotch portion of the underwear when being fixed to the undergarment. When the used absorbent article is peeled from the underwear, the wing-shaped flap is It is related with the absorbent article absorbent article which prevented tearing along the longitudinal direction of an absorbent article from the base end part.

  Conventionally, as an absorbent article N such as a sanitary napkin, a panty liner, a cage sheet, an incontinence pad, and the like, as shown in FIGS. 2. Description of the Related Art There is known one in which an absorbent body 52 made of cotton-like pulp is interposed between a back sheet 50 and a liquid-permeable surface sheet 51 made of a nonwoven fabric or a liquid-permeable plastic sheet.

  As this type of absorbent article N, in order to prevent misalignment in the mounted state, for example, 1 or 2 is provided on the non-skin contact surface side (surface side on the liquid-impermeable back sheet 50 side, outer surface side) of the main body portion. A plurality of adhesive layers 53, 53 are formed, and outwardly extending wing-shaped flaps W, W are integrally formed on both longitudinal sides of the main body portion, and the wing-shaped flaps W, W There is one in which pressure-sensitive adhesive layers 54 are provided on the surface (outer surface) of the liquid-impermeable back sheet 50 side.

  In order to fix the absorbent article N to the undergarment 30, as shown in FIG. 14, the absorbent article N is applied to a locally corresponding portion of the undergarment 30, and the wing-shaped flaps W, W protruding sideways are used as the undergarment. The outer wing flaps W and W are folded back at the wrapping lines RL and RL and bonded to the outer surface of the crotch portion of the underwear 30 so that the crotch portion of the underwear is wrapped, and then the underwear is attached to the body. I have to.

  In such an absorbent article, when the used absorbent article is peeled from the underwear, if the front end portion of the main body portion is picked and pulled toward the rear of the absorbent article, the wing-shaped flaps from the base end portion of the absorbent article There was often a problem of tearing along the longitudinal direction, leaving only the wing-shaped flaps in the undergarment.

  In order to solve such problems, several proposals have been made in which the wing-shaped flap is difficult to tear from the base end portion. In the following Patent Document 1, the plurality of joint portions in which the sheet material on the front side of the wing and the back sheet on the back side continuously extend in the width direction of the napkin and are intermittently arranged in the length direction of the napkin. A napkin that is bonded to a back sheet extension portion and a base end portion of the extension portion is disclosed. Moreover, in the following patent document 2, the side sheet and the back sheet are joined by a heat seal line in a region outside in the width direction from the absorber, and the heat seal line is winged from the front end side of the absorbent main body. Extending over the vicinity of the base on the front side of the part and extending from the rear end side of the absorbent main body to the vicinity of the base on the rear side of the wing part, but not provided between the vicinity of both bases or An absorbent article provided discontinuously in the longitudinal direction is disclosed.

Patent No. 4190074 JP 2008-119124 A

  However, in the napkin described in Patent Document 1, the wing-shaped flap is formed by joining the sheet on the front side of the wing and the back sheet by continuously forming the adhesive-coated portion in a direction crossing the longitudinal direction. There is a concern that the rigidity of the wing-shaped flap is increased by the adhesive-applied portion formed over the entire surface, and the skin contact is deteriorated.

  Further, in the absorbent article described in Patent Document 2, although the effect that the wing portion is difficult to break due to damage caused by the heat seal line is obtained, the wing-shaped flap is formed at the base portion when the used absorbent article is peeled off from the underwear. The problem of tearing is not considered.

  By the way, as a result of the investigation by the inventor, when the used absorbent article is peeled from the underwear, the following three are the tear lines when the wing-shaped flap is torn along the longitudinal direction of the absorbent article from the base end. It became clear that the pattern was typical.

  As a 1st tear line, there exists what extends along the longitudinal direction of an absorbent article so that it may pass along the substantially outer end part of the arc-shaped curve convex inside at the base end part connected with the main-body part of a wing-shaped flap ( 3a and 4a).

  Further, as the second tear line, the longitudinal direction of the absorbent article is formed continuously from the first tear line and passes through the inner edge of the adhesive layer provided on the back sheet side of the wing-shaped flap part. Some extend along the direction (13a in FIGS. 3 and 4).

  The first tear line and the second tear line are continuously formed on the outermost side in the width direction of the absorbent article, and are formed with a relatively high probability. On the other hand, the third tear line formed on the innermost side in the width direction of the absorbent article includes a substantially inner end portion of the arc-shaped curve formed at the base end portion on the front side of the wing-shaped flap, and a wing shape. It is the line | wire which connected the substantially inner side edge part of the said circular-arc-shaped curve formed in the base end part of the flap back side (14a of FIG.3 and FIG.4).

  From the above results, it is necessary to take effective tear prevention means for both the first tear line (second tear line) and the third tear line.

  Therefore, the main problem of the present invention is to provide an absorbent article that prevents the wing-shaped flap from being torn along the longitudinal direction of the absorbent article when the used absorbent article is peeled from the underwear. It is in.

In order to solve the above-mentioned problem, as the present invention according to claim 1, an absorbent body is interposed between the liquid-permeable top sheet and the back sheet, and the both sides are folded back along the folding line of the base end portion when mounted. In the absorbent article formed with a wing-shaped flap that is fixed so as to involve the crotch portion of the underwear
The outline of the base end portion of the wing-shaped flap is defined by an inwardly convex arcuate curve, and at least one compressed portion is formed at the base end portion of the wing-shaped flap and closer to the front side of the absorbent article And
The compressed portion includes a first imaginary line drawn along the longitudinal direction of the absorbent article so that the widthwise outer side of the absorbent article passes through substantially the outer end of the arcuate curve, and the wing-shaped flaps The second imaginary line drawn along the longitudinal direction of the absorbent article so as to pass through the inner edge of the pressure-sensitive adhesive layer provided on the back sheet side is straddled in the width direction of the absorbent article, and the width of the absorbent article The width direction of the absorbent article is a third imaginary line whose inner side in the direction connects the substantially inner end of the arcuate curve on the front side of the wing-shaped flap and the substantially inner end of the arcuate curve on the rear side of the wing-shaped flap. And at least the widthwise outer end of the absorbent article is curved to the front side of the absorbent article, and the widthwise outer end of the absorbent article is the front side of the rear end of the absorbent article. this formed so as to be located in The absorbent article according to claim is provided.

In the first aspect of the present invention, the outline of the base end portion of the wing-shaped flap is defined by an inwardly convex arc-shaped curve, and is the base end portion of the wing-shaped flap and a position closer to the front side of the absorbent article At least one pressing portion is formed. And the said compression part is the 1st virtual line and the wing-shaped flap which were pulled along the longitudinal direction of the absorbent article so that the width direction outer side of an absorbent article may pass the substantially outer side edge part of the said arc-shaped curve. The second imaginary line drawn along the longitudinal direction of the absorbent article so as to pass through the inner edge of the pressure-sensitive adhesive layer provided on the back sheet side is straddled in the width direction of the absorbent article, and the width of the absorbent article The width direction of the absorbent article is a third imaginary line whose inner side in the direction connects the substantially inner end of the arcuate curve on the front side of the wing-shaped flap and the substantially inner end of the arcuate curve on the rear side of the wing-shaped flap. It is formed so as to straddle. For this reason, when peeling a used absorbent article from underwear, a pressing part is arranged so as to straddle any tear line of the first tear line, the second tear line, and the third tear line. Therefore, it is possible to prevent the base end portion of the wing-shaped flap from being torn along the longitudinal direction along these tear lines.

In the invention according to claim 1 , as the pressing portion , at least the widthwise outer side of the absorbent article is formed in a shape that curves to the front side of the absorbent article, and the widthwise outer end of the absorbent article is formed on the absorbent article. because it formed so as to be located forward of the rear end portion, after the tear line formed from outline of the wing-shaped flaps base end reaches the compression portions, along the compression portion of the absorbent article width The tear line can be prevented from expanding outward in the direction.

As the present invention according to claim 2 , the wing-shaped flap has at least a contour line on the front side of the absorbent article as a wavy line or a curve or a combination thereof.
The first imaginary line drawn along the longitudinal direction of the absorbent article from the substantially outer end of the arcuate curve passes through a point where the arcuate curve that protrudes inwardly changes to an outwardly convex curve. the absorbent article of claim 1 Symbol placement is a virtual line drawn along the longitudinal direction of the absorbent article is provided.

In the invention described in claim 2 above, when the outline of at least the front side of the absorbent article of the wing-shaped flap is defined by a wavy line, a curve, or a combination thereof, The first imaginary line drawn along the longitudinal direction of the absorbent article so as to pass through the portion "means that the absorbent article passes through a point where the arc-shaped curve protruding inwardly changes to the convex curve outwardly. It points out the virtual line drawn along the longitudinal direction. The point of switching from this arcuate curve to a convex curve outward is the turning along the arcuate curve from the base end side of the wing-shaped flap when the front end of the main body part is picked and pulled toward the rear of the absorbent article However, it is difficult to expand further outward, and stress tends to concentrate, and a tear line (first tear line) in the longitudinal direction of the absorbent article is likely to occur.

As the present invention according to claim 3 , the wing-shaped flap is formed such that an outer contour line outside the arc-shaped curve is substantially linear.
In the longitudinal direction of the absorbent article, the first imaginary line drawn along the longitudinal direction of the absorbent article from the substantially outer end of the arcuate curve passes through the point where the arcuate curve switches to a substantially straight line. along absorbent article of claim 1 Symbol placement is a virtual line drawn is provided.

In the third aspect of the invention, in the case where the outer contour line outside the arcuate curve of the wing-shaped flap is formed substantially linearly, the above-mentioned “the absorbent article passes through the substantially outer end of the arcuate curve. The “first imaginary line drawn along the longitudinal direction” is defined to indicate an imaginary line drawn along the longitudinal direction of the absorbent article so as to pass through a point where the arcuate curve is switched to a substantially straight line. . The point at which this arcuate curve is switched to a substantially straight line is the point that the turn along the arcuate curve from the proximal end side of the wing-shaped flap is difficult to expand further outward and the stress tends to concentrate as in the above. This is the point where the tear line is likely to occur.

As this invention which concerns on Claim 4 , the said pressing part is provided with two or more intervals in the longitudinal direction of an absorbent article, and the pressing part provided in the back side of an absorbent article is gradually outside the width direction of an absorbent article. The absorbent article in any one of Claims 1-3 currently formed in the wide area | region is provided.

In the invention according to claim 4 , the compressed parts are provided in a plurality of stages at intervals in the longitudinal direction of the absorbent article, and the compressed parts provided on the rear side of the absorbent article are gradually widened outward in the width direction of the absorbent article. Even if the expansion of the tear line could not be prevented at the first-stage compressed portion by forming in the region, the tear line is expanded by forming the compressed portion after the second step in the gradually wider region. Is surely prevented.

As this invention which concerns on Claim 5 , the said pressing part is provided with two or more intervals in the longitudinal direction of an absorbent article, and the pressing part width | variety is gradually formed thicker as the pressing part provided in the back side of an absorbent article. An absorbent article according to any one of claims 1 to 4 is provided.

In the invention according to the fifth aspect , the compressed parts are provided in a plurality of stages at intervals in the longitudinal direction of the absorbent article, and the compressed parts provided on the rear side of the absorbent article are formed so that the width of the compressed part gradually increases. Even when the expansion of the tear line cannot be prevented by the first-stage squeezing part , the squeezing line is surely prevented from expanding by gradually increasing the width of the squeezing part after the second stage.

As this invention which concerns on Claim 6 , while the said pressing part is made into the intermittent pattern in which the pressing part and the non-squeezing part were alternately formed along the width direction of the absorbent article, the longitudinal direction of an absorbent article. The absorbent article according to any one of claims 1 to 5 , wherein a plurality of the non- compressed parts of adjacent compressed parts are formed so as not to overlap each other in the longitudinal direction of the absorbent article. Is done.

In the invention described in claim 6, wherein, as too hard and compressing portion does not deteriorate per skin, the compressing portion and the compressed portion substantially along the width direction of the absorbent article and the non-compressed portion are formed alternately An intermittent pattern is used. In this case, when provided in a plurality of stages spaced a compressing portion in the longitudinal direction of the absorbent article, in order to prevent the non-compressed portion becomes the base point of the tear line, the non-compressed portions of the compressed portion adjacent Is formed so as not to overlap in the longitudinal direction of the absorbent article.

As the present invention according to claim 7, compressing portions provided at the most front side of the absorbent article of the compression unit, according to claim 1 to 6 or which is provided in contact with the outline of the absorbent article An absorbent article is provided.

In the invention according to claim 7 , by providing the pressing portion provided on the foremost side of the absorbent article so as to be in contact with the outer shape line of the absorbent article, the base point of the tear line is made difficult and the effect of preventing tearing is further enhanced. ing.

  As described above in detail, according to the present invention, it is possible to prevent the wing-shaped flap from being torn along the longitudinal direction of the absorbent article when the used absorbent article is peeled from the underwear.

It is a partial fracture development view of sanitary napkin 1 concerning the present invention. It is the II-II arrow directional view. FIG. 3 is an enlarged development view of a wing-shaped flap W showing an emboss 11. It is an expansion expanded view of the wing-shaped flap W which concerns on the other form example. It is an expanded development view of the wing-shaped flap W which shows the embossing 11 which concerns on another form example. It is an expanded development view of the wing-shaped flap W which shows the embossing 11 which concerns on another form example. (A), (B) is an expanded development view of the wing-shaped flap W which shows the embossing 11 which concerns on the other form example. It is an expanded development view of the wing-shaped flap W which shows the embossing 11 which concerns on another form example. (A), (B) is a top view of the embossing 11 which concerns on another form example. It is an expanded development view of the wing-shaped flap W which shows the embossing 11 which concerns on another form example. It is a top view of the embossing 11 which concerns on another form example. It is an expanded view of the conventional absorbent article N. FIG. 13 is a view taken along line XIII-XIII in FIG. 12. It is a perspective view which shows the attachment point of the absorbent article N.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<< Basic structure of sanitary napkin 1 >>
As shown in FIGS. 1 and 2, the sanitary napkin 1 according to the present invention has a liquid-impervious back sheet 2 made of a polyethylene sheet, a polypropylene sheet, or the like, and a permeate that quickly permeates menstrual blood or a cage. The liquid surface sheet 3, the absorbent body 4 made of cotton-like pulp or synthetic pulp interposed between the two sheets 2 and 3, and the absorbent body 4 for maintaining the shape of the absorbent body 4 and improving the diffusibility. Crepe paper 5 and side nonwoven fabrics 7 and 7 provided on both sides of the surface along the longitudinal direction. Around the absorber 4, at the upper and lower edge portions, the outer edge portions of the liquid-impervious back sheet 2 and the liquid-permeable surface sheet 3 are joined by an adhesive such as hot melt or an adhesive means such as heat seal. In addition, the liquid-impervious back sheet 2 and the side nonwoven fabric 7 that extend laterally from the absorbent body 4 at both side edges thereof are bonded to each other by an adhesive such as hot melt or an adhesive means such as heat seal. Has been.

Hereinafter, the structure of the sanitary napkin 1 will be described in detail.
As the liquid-impermeable back sheet 2, a sheet material having at least water shielding properties such as an olefin resin sheet such as polyethylene or polypropylene is used. In addition, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or A nonwoven fabric sheet (in this case, the waterproof film and the nonwoven fabric constitute a liquid-impervious back sheet) can be used after substantially impervious to liquid imperviousness by interposing a waterproof film. In recent years, those having moisture permeability tend to be used from the viewpoint of preventing stuffiness. This water- and moisture-permeable sheet material is a microporous sheet obtained by forming a sheet by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, and then stretching in a uniaxial or biaxial direction. It is.

  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. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft.

  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, for example, as granular powder. Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolved pulp, and artificial cellulose fibers such as rayon and acetate. Softwood pulp having a longer fiber length than hardwood pulp functions and It is preferably used in terms of price. When the crepe paper 5 surrounding the absorbent body 4 is provided as in this example, the crepe paper 5 is interposed between the liquid-permeable surface sheet 3 and the absorbent body 4 as a result. The crepe paper 5 which is excellent in diffusing body fluids quickly prevents reversal of menstrual blood and the like.

  On the other hand, side nonwoven fabrics 7 and 7 are provided on both sides on the surface side of the sanitary napkin 1 along the longitudinal direction and over almost the entire length of the napkin 1, respectively. Wing-like flaps W and W are formed by a part of the liquid-impervious back sheet 2 that extends to the side and also extends to the side.

  As the side nonwoven fabric 7, a water-repellent treated nonwoven fabric or a hydrophilic treated nonwoven fabric can be used from the viewpoint of an important function. 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 It is desirable to use a nonwoven fabric. Further, if importance is attached to the absorption of menstrual blood and the like in the wing-shaped flaps W, W, a method of polymerizing a compound having a hydrophilic group, for example, an oxidation product of polyethylene glycol, in the process of producing a synthetic fiber, , By treating with a metal salt such as stannic chloride, partially dissolving the surface to make it porous, and depositing metal hydroxides to swell or make the synthetic fiber porous, applying capillary action to make it hydrophilic The hydrophilic treatment nonwoven fabric which gave is used.

  As shown in FIGS. 1 and 2, the non-skin contact surface (impermeable physiological surface) of the main body portion in which the absorbent body 4 is interposed between the liquid-permeable top sheet 3 and the liquid-impermeable back sheet 2. On the outer surface of the sheet 2, three main body misalignment-adhering adhesive layers 8, 8... Are formed in a plurality of illustrated examples by an appropriate application pattern for fixing to the underwear, and a wing-shaped flap W, A wings prevention adhesive layer 9 is formed on the surface of the W liquid-impermeable back sheet.

<< Tearning prevention means for wing-shaped flap W >>
In the sanitary napkin 1, when the used sanitary napkin is peeled from the underwear, a tear preventing means is provided for preventing the wing-shaped flap W from being torn along the longitudinal direction of the napkin from the base end portion. . Hereinafter, the tear preventing means will be described.

  In a general wing-shaped flap W, as shown in FIG. 3 and FIG. 4, the outlines are defined by arc-shaped curves 10, 10 that are convex inward at the base ends of the front end and the rear end, respectively. ing. On the other hand, there are various outer shapes of the arcuate curves 10 and 10 in the napkin width direction. For example, in FIG. 3, they are formed by wavy lines, curves, or a combination thereof. It is formed almost linearly.

  When the tear prevention means is not provided, when the used sanitary napkin is peeled from the underwear in the wing-shaped flap W shown in FIGS. 3 and 4, the wing-shaped flap W is torn along the napkin longitudinal direction from the base end portion. A tear line pattern to be described will be described. A tear line formed at the outermost side in the napkin width direction of the wing-shaped flap W is a first tear line 12a formed along the longitudinal direction of the napkin so as to pass through the substantially outer end portion 10a of the arc-shaped curve 10. Continuing from the first tear line 12a, a second tear line 13a formed along the longitudinal direction of the napkin so as to pass through the inner edge of the wings-stop adhesive layer 9 is formed. When the first tear line 12a and the second tear line 13a are formed so as to be shifted in the napkin width direction as in the illustrated example, the rear end portion of the first tear line 12a is on the second tear line 13a side. It is formed in a shape that bends. On the other hand, the tear line formed on the innermost side in the napkin width direction of the wing-shaped flap W has a substantially inner end 10b of the arcuate curve 10 on the front side of the napkin and an almost inner end 10b of the arcuate curve 10 on the rear side of the napkin. A tied third tear line 14a is formed. These tear lines 12a, 13a, and 14a show typical patterns formed on the outermost and inner sides in the napkin width direction, such as the folding position of the wing-shaped flap W to the underwear and the force for tearing off the napkin. In some cases, these intermediate portions may also be formed.

  In the sanitary napkin 1, at least one emboss 11 is provided at the proximal end of the wing-shaped flap W and at the front side of the napkin so that the tear lines 12 a, 13 a, and 14 a do not expand in the napkin longitudinal direction. Is formed. Specifically, the emboss 11 includes a first imaginary line 12 and a wing-shaped flap drawn along the longitudinal direction of the napkin so that the outer side in the napkin width direction passes through the substantially outer end portion 10a of the arcuate curve 10. The second virtual line 13 drawn along the napkin longitudinal direction so as to pass through the inner edge of the pressure-sensitive adhesive layer 9 provided on the liquid-impermeable back sheet 2 side of W straddles the napkin width direction, and the napkin width. A region where the inner side in the direction spans the third imaginary line 14 connecting the substantially inner end 10b of the arcuate curve 10 on the front side of the napkin and the substantially inner end 10b of the arcuate curve 10 on the rear side of the napkin in the napkin width direction. Is formed. That is, the emboss 11 is formed between the first virtual line 12 or the second virtual line 13 and the third virtual line 14, and the first virtual line 12 or the second virtual line 13 is connected to the napkin. A range extending outward in the width direction and a range extending the third imaginary line 14 inward in the napkin width direction are formed. The first virtual line 12 corresponds to the first tear line 12a, the second virtual line 13 corresponds to the second tear line 13a, and the third virtual line 14 corresponds to the third tear line 14a. Corresponding.

  By forming the emboss 11 in a region straddling these imaginary lines 12 to 14, the first tear line 12a formed along the first imaginary line 12 is prevented from expanding from the emboss 11 to the napkin longitudinal direction. In addition, it is possible to prevent the generation of the second tear line 13a formed along the second imaginary line 13 following the first tear line 12a. Further, the third tear line 14 a formed along the third imaginary line 14 can be prevented from expanding from the emboss 11 to the napkin longitudinal direction.

  Here, the above-mentioned “first imaginary line 12 drawn along the longitudinal direction of the napkin so as to pass through the substantially outer end 10a of the arcuate curve 10” will be described in more detail. As shown in FIG. When the flap W is at least the front side of the napkin, and in the illustrated example, the outlines on the front side and the rear side of the napkin are wavy lines, curves, or a combination thereof, the above-mentioned “almost outer end 10a of the arc-shaped curve 10” 10 is a point closer to the outer side in the width direction of the napkin, and points to a point where an arcuate curve 10 formed by an inwardly convex curve switches to an outwardly convex outline, and the napkin passes through this point. A line drawn along the longitudinal direction is the first imaginary line 12. Moreover, the direction along the napkin longitudinal direction is the direction along the napkin longitudinal centerline CL.

  On the other hand, as shown in FIG. 4, when the contour line outside the napkin is formed almost linearly as the wing-shaped flap W from the arc-shaped curve 10, the above-mentioned “almost outer end 10 a of the arc-shaped curve 10” Is a position on the outer side in the napkin width direction of the arcuate curve 10 and indicates a point where the arcuate curve 10 is switched to a substantially straight outline, and is drawn along the longitudinal direction of the napkin so as to pass through this point. The line is the first virtual line 12. The contour line is substantially straight from the case where the outer contour line outside the arcuate curve 10 is formed by a straight line, as well as from a very large radius of curvature (for example, 5 times or more) with respect to the radius of curvature of the arcuate curve 10. This also includes the case of being formed by a curved line.

  The first imaginary line 12 is closer to the napkin width direction than the second imaginary line 13 by the relative positional relationship between the substantially outer end 10a of the arcuate curve 10 and the adhesive layer 9, as shown in FIG. The first imaginary line 12 may be formed on the inner side in the napkin width direction with respect to the second imaginary line 13 as shown in FIG. Further, the first imaginary line 12 and the second imaginary line 13 may be formed substantially on a straight line. In any case, the outer side of the emboss 11 in the napkin width direction is disposed so as to straddle the first imaginary line 12 and the second imaginary line 13 in the napkin width direction.

  The “substantially inner end portion 10b of the arcuate curve 10” is a position closer to the center side of the arcuate curve 10 in the napkin width direction, and is substantially straight from the arcuate curve 10 formed by an inwardly convex curve. Or it is the point which switches to the outward outline which is convex.

  It is preferable that the emboss 11 is formed in an inwardly convex arc shape and is arranged so as to be substantially parallel to the arcuate curve 10. Thereby, even when a tear line is formed in the middle portion of the arcuate curve 10, the emboss 11 can prevent the tear line from expanding in the napkin longitudinal direction. In the illustrated example, the emboss 11 is formed in a thin crescent shape in which the emboss line width is thick at the center and thin at both ends, but it may be formed with a uniform width over the entire length, or only one end is thin. You may form in such a shape. The emboss line width is preferably about 1 mm to 6 mm, more preferably about 2 mm, at the thickest part. If the line width is narrowed, the hardness decreases and deterioration per skin can be prevented. However, if the line width is too thin, it is difficult to obtain an effect of preventing tearing. On the other hand, if the line width is increased, the tear preventing effect is enhanced, but the hardness is easily felt and the skin contact is deteriorated.

  In addition, as shown in FIG. 5, the emboss 11 is formed in a straight line having an equal width along the napkin width direction in the region straddling the first to third imaginary lines 12 to 14. The tip portion may be curved to the front side in the longitudinal direction of the napkin in a portion extending outward of the lip, and may be formed so as to gradually narrow toward the tip portion. As a result, the emboss 11 intersects the first tear line 12a and the third tear line 14a along the longitudinal direction of the napkin substantially at right angles, and it is easy to obtain a tear prevention effect. It is possible to prevent the tearing from extending along the width of the napkin in the napkin width direction.

  As shown in FIG. 3, the emboss 11 is formed in such a shape that at least the outer side in the napkin width direction curves toward the front side of the napkin, and the outer end portion 11a in the napkin width direction has a napkin from the rear end portion 11b in the napkin longitudinal direction. It is preferable to form so that it may be located in the front side. The rear end portion 11b in the napkin longitudinal direction is a portion of the emboss 11 that is located on the most rear side in the napkin longitudinal direction. Thereby, it becomes possible to prevent the tear line formed between the outer shape line of the wing-shaped flap W and the emboss 11 from expanding toward the outside in the napkin width direction along the emboss 11 thereafter. In the example shown in FIG. 3, the inner end portion 11 c in the napkin width direction is also formed so as to be located on the front side of the napkin with respect to the rear end portion 11 b in the napkin longitudinal direction. It can also be prevented from being torn toward the inside.

  Further, the rear end portion 11b of the emboss 11 is substantially the napkin width direction of the first virtual line 12 and the second virtual line 13 between the virtual line formed outside and the third virtual line 14. It is preferable to arrange so as to be located at the center. Thereby, tearing along the emboss 11 can be effectively prevented.

  In the above-described embodiment, the emboss 11 is provided in one stage. However, as shown in FIG. 6, the emboss 11 can be provided in a plurality of stages at intervals in the napkin longitudinal direction. At this time, the distance S in the longitudinal direction of the napkin between the embosses 11 and 11 is about 3 mm to 10 mm, preferably about 5 mm, at the narrowest place. If the distance S is too small, the hardness will be increased and the skin contact will be deteriorated. If the distance S is too large, it will be difficult to obtain the tear preventing effect. If the number of steps of the emboss 11 is large, the effect of preventing tearing will be high, but if it is too large, it will become hard and the feeling of wearing will be poor, so it is preferably 1 to 5 steps. In FIG. 6, it is provided in three stages. The embosses 11, 11... Provided in a plurality of stages may have the same shape or different shapes.

  When the embosses 11 are provided in a plurality of stages, as shown in FIG. 7A, it is preferable that the embosses 11 provided on the rear side in the longitudinal direction of the napkin are gradually formed in a wider area on the outer side in the napkin width direction. As a result, even if tearing cannot be prevented by the first emboss 11, the second and subsequent embosses can be more reliably prevented. At this time, the napkin width direction inner side of the emboss 11 of each step is provided substantially along the napkin longitudinal direction line. This is because the tear line is difficult to expand inward in the napkin width direction from the aspect of forming the tear line, and the skin contact may be deteriorated if the emboss 11 is formed by extending in the napkin width direction.

  For the same reason, as shown in FIG. 7B, the embossing provided on the rear side of the napkin may be formed so that the embossing width gradually increases. Furthermore, the embossing provided on the back side of the napkin may be formed in a wider area on the outer side in the width direction of the napkin, and the embossing width provided on the back side of the napkin may be gradually increased.

  As shown in FIG. 8, the emboss 11 can be an intermittent pattern in which the embossed portions 11d and the non-embossed portions 11e are alternately formed along the emboss so as not to become too hard to deteriorate the skin contact. . In the case where a plurality of such embossed patterns 11 are provided at intervals in the napkin longitudinal direction, the non-embossed portions 11e are adjacent to each other in order to prevent the non-embossed portion 11e from becoming the base of the tear line and expanding in the napkin longitudinal direction. It is preferable to arrange the embossed portions 11 and 11 so that the non-embossed portions 11e do not overlap in the napkin longitudinal direction. That is, about two adjacent embosses 11 and 11, the non-embossed part 11e and the embossed part 11d are arrange | positioned so that it may overlap in a napkin longitudinal direction.

  The emboss 11 is formed in a substantially arc shape in the above-described example, but as shown in FIG. 9, the emboss 11 is formed in a polygonal line pattern or a pattern in which a plurality of arcs are connected along this arc-shaped curve. May be. Thereby, since the outline line along the emboss 11 is formed in an uneven shape, it is possible to more reliably prevent the tear line from expanding along the emboss 11.

  By the way, as shown in FIG. 10, the emboss 11 provided on the foremost side in the longitudinal direction of the napkin can be provided in contact with the outline of the sanitary napkin 1. That is, the emboss 11 can be provided without leaving a gap between the outline of the sanitary napkin 1 and the emboss 11. As a result, it becomes difficult to form the base point of the tear line on the outline of the sanitary napkin 1, and therefore it is possible to more reliably prevent the wing-shaped flap W from being torn.

  Moreover, as shown in FIG. 11, the embossing 11 is preferably provided with a plurality of non-squeezed portions 11f, 11f,. As a result, the hardness of the emboss 11 can be suppressed, and the skin contact can be improved. In particular, when the emboss 11 is provided so as to be in contact with the outline of the napkin in FIG. 10, there are many opportunities for the emboss 11 to come into contact with the skin, which is extremely effective. The non-compressed portion 11f can be formed in various shapes such as a circular shape shown in FIG. 11A and a linear shape shown in FIG. Moreover, it is good also as a low pressure squeezing part squeezed by the pressure relatively lower than another part, without setting it as a non-pressed part.

  The embossing 11 may be applied simultaneously with the entire circumferential embossing for joining the liquid-impermeable back sheet 2 and the liquid-permeable surface sheet 3 or the side nonwoven fabric 7 over substantially the entire circumference of the sanitary napkin 1. Alternatively, it may be applied at the same time as the side embossing 15 applied substantially along the longitudinal direction of the napkin to the laminated portion of the liquid-permeable surface sheet 3 and the side nonwoven fabric 7.

[Other examples]
(1) By the way, as shown in FIG. 3, the wings-stop adhesive layer 9 is located on the rear side in the longitudinal direction of the napkin from the formation region of the emboss 11 and on the rear side of the wing-shaped flap W. It is preferable to form. Thus, when the used sanitary napkin 1 is peeled off, the embossing 11 prevents tearing of the base end portion of the wing-shaped flap W, while turning over from the front edge of the wing-shaped flap W not fixed to the underwear, The wings-stop adhesive layer 9 is easily peeled off from the front edge. Further, as shown in FIG. 3, the embossing 11 prevents the proximal end portion of the wing-shaped flap W from being torn by making the front outline of the wing-shaped flap W a wavy line, a curve, or a combination thereof. On the other hand, the front side of the wing-shaped flap W is easily turned over as a whole.

(2) In the above embodiment, the emboss 11 is formed closer to the front side of the wing-shaped flap W, but when the used sanitary napkin 1 is peeled off from the underwear, the rear end of the napkin is picked and peeled off. In consideration of the case, the emboss 11 may be formed at a position closer to the rear side of the wing-shaped flap W.

  DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Impervious back sheet, 3 ... Impervious surface sheet, 4 ... Absorber, 5 ... Crepe paper, 7 ... Side nonwoven fabric, 8 ... Main body slip prevention adhesive layer, 9 ... Wing Anti-displacement adhesive layer, 10 ... arc-shaped curve, 11 ... emboss, 12 ... first imaginary line, 12a ... first tear line, 13 ... second imaginary line, 13a ... second tear line, 14 ... 3rd virtual line, 14a ... 3rd tear line, W ... Wing-like flap

Claims (7)

A wing shape in which an absorbent body is interposed between the liquid-permeable top sheet and the back sheet, and the crotch part of the underwear is fixed by being folded along the fold line of the base end part at the time of wearing on both sides. In the absorbent article formed with a flap,
The outline of the base end portion of the wing-shaped flap is defined by an inwardly convex arcuate curve, and at least one compressed portion is formed at the base end portion of the wing-shaped flap and closer to the front side of the absorbent article And
The compressed portion includes a first imaginary line drawn along the longitudinal direction of the absorbent article so that the widthwise outer side of the absorbent article passes through substantially the outer end of the arcuate curve, and the wing-shaped flaps The second imaginary line drawn along the longitudinal direction of the absorbent article so as to pass through the inner edge of the pressure-sensitive adhesive layer provided on the back sheet side is straddled in the width direction of the absorbent article, and the width of the absorbent article The width direction of the absorbent article is a third imaginary line whose inner side in the direction connects the substantially inner end of the arcuate curve on the front side of the wing-shaped flap and the substantially inner end of the arcuate curve on the rear side of the wing-shaped flap. And at least the widthwise outer end of the absorbent article is curved to the front side of the absorbent article, and the widthwise outer end of the absorbent article is the front side of the rear end of the absorbent article. this formed so as to be located in Absorbent article characterized by. The wing-shaped flap has at least an outer shape line on the front side of the absorbent article as a wavy line or a curve or a combination thereof,
The first imaginary line drawn along the longitudinal direction of the absorbent article from the substantially outer end of the arcuate curve passes through a point where the arcuate curve that protrudes inwardly changes to an outwardly convex curve. the absorbent article of claim 1 Symbol placement is a virtual line drawn along the longitudinal direction of the absorbent article. In the wing-shaped flap, the outer contour line outside the arc-shaped curve is formed substantially linearly,
In the longitudinal direction of the absorbent article, the first imaginary line drawn along the longitudinal direction of the absorbent article from the substantially outer end of the arcuate curve passes through the point where the arcuate curve switches to a substantially straight line. along absorbent article of claim 1 Symbol placement is a virtual line drawn. A plurality of the compressed parts are provided at intervals in the longitudinal direction of the absorbent article, and the compressed parts provided on the rear side of the absorbent article are formed in a wider area on the outer side in the width direction of the absorbent article. The absorbent article in any one of 1-3 . The compression unit includes a plurality spaced in the longitudinal direction of the absorbent article, to claim 1-4 or progressively compressing portion width as compressing portion which is provided on the rear side of the absorbent article is formed thicker The absorbent article as described. The compressed part is an intermittent pattern in which compressed parts and non-squeezed parts are alternately formed along the width direction of the absorbent article, and a plurality of compressed parts are provided at intervals in the longitudinal direction of the absorbent article. The absorptive article according to any one of claims 1 to 5 formed so that said non- squeezed parts of an adjacent pressing part may not overlap in the longitudinal direction of an absorptive article. The absorptive article according to any one of claims 1 to 6, wherein the squeezing part provided on the foremost side of the absorptive article among the squeezing parts is provided so as to be in contact with the outer shape line of the absorptive article.

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