JP2013220225A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article whose wing is not easily folded at an unintended part during wearing work or while being worn.SOLUTION: A peripheral edge 60 of a wing 6 is constituted of only a curve 61 convex toward the outer part of the wing 6. Also, with one virtual straight line 13 passing through the maximum width part of the wing 6 and extending in a width direction Y as a boundary, one side in a longitudinal direction X of the wing 6 is defined as one side 65, and the other side is defined as the other side 66. Further, when each of one side 65 and the other side 66 is equally divided into three in the longitudinal direction X, an area equivalent to 2/3 in the longitudinal direction near the virtual straight line 13 on one side 65 is defined as a one-side specific area 65C, and an area equivalent to 2/3 in the longitudinal direction near the virtual straight line 13 on the other side 66 is defined as an another-side specific area 66C, curvature radiuses of the peripheral edge 60 of the wing 6 in both specific areas 65C and 66C are different from each other. A length along the longitudinal direction of the wing 6 is the longest near a boundary line 14 of the wing 6 and an absorbent body 10.

Description

  The present invention relates to absorbent articles such as sanitary napkins, panty liners, and incontinence pads.

  Conventionally, an absorbent article having a wing for fixing the absorbent article to clothing such as shorts is known. FIG. 5 shows an example of a conventional sanitary napkin provided with wings. The sanitary napkin 90 shown in FIG. 5 includes a top sheet 91 that forms a skin facing surface, a back sheet (not shown) that forms a non-skin facing surface, and a liquid-retaining absorbent disposed between both sheets. And a pair of wings 95, 95 extending outwardly in the width direction Y from both side portions along the longitudinal direction X of the absorbent body 94. A wing adhesive portion 96 for fixing the wing 95 to the clothes is provided on the non-skin facing surface of the wing 95. The wing 95 has a substantially isosceles trapezoidal shape in plan view, and the periphery thereof includes a straight line and has a corner 95a. In order to attach the napkin 90 to the shorts, first, the absorbent main body 94 is opposed to the skin of the crotch part (crotch portion) of the shorts via the main body adhesive portion (not shown) provided on the non-skin facing surface. Then, the pair of wings 95 and 95 are folded back to the non-skin facing surface side of the absorbent main body 94 along the fold line 97, and the non-skin facing of the crotch part is interposed through the wing adhesive portion 96. Secure on the surface.

  In the absorbent article having such wings, when the wings are folded back during the mounting operation, only part of the wings are folded back when they are inadvertently folded, and the wing adhesive portions are bonded to each other, so that wrinkles and raised portions are formed on the wings. Or the wing may be folded back at an outer position in the width direction with respect to the folding line, and there is a risk of erroneous adhesion that adheres to the main body adhesive portion. As a technique for solving such a problem, Patent Document 1 discloses that an outer shape is absorbed in a wing composed of a front outline, a rear outline, and a front outline connecting the two outlines. The angle formed by the width direction line and the rear side outline is set larger than the angle formed by the width direction line of the article and the front side outline, and further, the center of gravity of the wing is defined as the root of the wing. A technique for biasing to the front side of the center of the joint line with the main body portion is described. Patent Document 1 also describes that the wing protrusion length is made longer than the crotch width of the shorts for the purpose of improving the fixability of the wings to the shorts.

  Further, Patent Document 2 discloses that the stress generated in the wing when the wing is folded back along the edge of the crotch of the shorts and fixed to the crotch is removed, and the wing is detached from the shorts due to the stress. In order to prevent this, a technique is described in which a waveform section including a large number of crease lines arranged in a radial pattern is provided in a part of the wing.

JP 2009-125430 A JP-T 9-511929

  In a conventional absorbent article provided with a wing, the wing is different from an appropriate folding portion (for example, the folding line 97 in FIG. 5) during mounting work (when folding the wing) or during mounting (in use). There was a problem that the part folds to one side or the other side unintentionally, which causes wings and turns in the wing. The twist and turn of the wing can prevent stable fixing of the absorbent article to clothing such as shorts, and can also be a factor that reduces the feeling of wearing. No absorbent article has yet been provided in which the wings are less likely to break at unintended parts during mounting work or during mounting, and the wings are not easily twisted or turned up.

  Accordingly, an object of the present invention is to provide an absorbent article that is less likely to be broken at a portion where wings are not intended during mounting work or during mounting.

  In the sanitary napkin provided with the wing as shown in FIG. 5, the present inventors have conducted various studies on wing folding (unwinding and turning) at an unintended site during the mounting operation or during mounting. Such a wing fold is likely to occur starting from a corner of the wing (for example, a portion indicated by reference numeral 95a in FIG. 5), and 2) a portion where most of the wearers fold their wings during wearing work. As a result of further study, we found that the wing folds easily because the force that turns back the wing is harder to be transmitted to the part farther from the maximum width part of the wing (the part with the maximum length in the width direction of the wing). The wing periphery that forms the outer shape (contour) of the absorbent article is composed of only a relatively gentle curve and is asymmetrical between the front side and the rear side in the longitudinal direction of the absorbent article. , Broken wing (twist-curled) has knowledge to be effectively prevented.

  The present invention has been made based on the above knowledge, and extends vertically outward from each of the vertically long absorbent main body having a liquid-retaining absorbent body and both side portions along the longitudinal direction of the absorbent main body. An absorbent article having a pair of wings, wherein a peripheral edge of the wing is configured only by a convex curve toward the outside of the wing, and extends in the width direction through a maximum width portion of the wing. With one imaginary straight line as a boundary, one side of the wing in the longitudinal direction is one side of the wing, the other side is the other side of the wing, and each of the wing one side and the other side of the wing is 3 etc. in the longitudinal direction. A region corresponding to two-thirds of the longitudinal direction near the virtual straight line on one side of the wing, and a region corresponding to two-thirds of the longitudinal direction near the virtual straight line on the other side of the wing. Do When the region is a specific region on the other side of the wing, the radii of curvature of the wings in the specific regions are different from each other, and the length along the longitudinal direction of the wing is the boundary between the wing and the absorbent main body The problem is solved by providing the longest absorbent article in the vicinity of the line.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article with which it is hard to bend | fold at the site | part which the wing does not intend at the time of mounting | wearing operation | working or mounting | wearing, and it is hard to generate | occur | produce the twist of a wing and turning is provided.

FIG. 1 is a plan view schematically showing a skin facing surface side of a sanitary napkin which is an embodiment of the absorbent article of the present invention. FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II of FIG. FIG. 3 is an enlarged plan view schematically showing an enlarged wing of the sanitary napkin shown in FIG. 1. FIG. 4 is a plan view (corresponding to FIG. 3) schematically showing another embodiment of the wing according to the present invention. FIG. 5 is a plan view (corresponding to FIG. 1) schematically showing the skin facing surface side of a conventional absorbent article (sanitary napkin). FIG. 6A and FIG. 6B are enlarged plan views (corresponding to FIG. 3) schematically showing enlarged wings in an absorbent article (sanitary napkin) outside the scope of the present invention. .

  Hereinafter, the absorbent article of this invention is demonstrated with reference to drawings based on the sanitary napkin which is one preferable embodiment. As shown in FIGS. 1 and 2, the napkin 1 of the present embodiment includes a vertically long absorbent main body 10 including a liquid retaining absorbent body 4 and both side portions along the longitudinal direction X of the absorbent main body 10. And a pair of wings 6A, 6A extending outward in the width direction Y.

  More specifically, the absorbent main body 10 is disposed between the top sheet 2 that forms the skin facing surface of the napkin 1, the back sheet 3 that forms the non-skin facing surface of the napkin 1, and the two sheets 2 and 3. An absorber 4 is provided. As shown in FIG. 1, the absorbent main body 10 (napkin 1) faces in the longitudinal direction X the front part A that is arranged near the wearer's stomach when worn and the excretion part of the wearer such as the vaginal opening. It is divided into an excretion part facing part B including a part and a rear part C arranged on the back side of the wearer from the excretion part facing part B at the time of wearing. The excretion part opposing part B in the napkin 1 of this embodiment is a site | part which has a pair of wings 6A and 6A on either side.

  In the present specification, the longitudinal direction (X direction in the figure) is a direction along the long side of the absorbent article (sanitary napkin) or its constituent members (absorbent body etc.), and the width direction (Y in the figure). Direction) is a direction orthogonal to the longitudinal direction. Further, the skin facing surface is a surface directed to the skin side of the wearer when the absorbent article is mounted in the absorbent article or a component thereof, and the non-skin facing surface is an absorption in the absorbent article or a component thereof. It is a surface that is directed to the side opposite to the skin side (clothing side such as underwear) when the property article is worn.

As shown in FIG. 1 and FIG. 2, the top sheet 2 covers the whole area of the skin-facing surface of the absorbent body 4 and further extends outward in the width direction Y from the left and right side edges along the longitudinal direction X of the absorbent body 4. I'm out.
The back sheet 3 covers the entire area of the non-skin facing surface of the absorbent body 4 and further extends outward in the width direction Y from the left and right side edges along the longitudinal direction X of the absorbent body 4. The extension part of the surface sheet 2 mentioned above is mutually joined by well-known joining means, such as an adhesive agent, a heat seal, and an ultrasonic seal.
Further, the top sheet 2 and the back sheet 3 extend from one end and the other end of the absorbent body 4 in the longitudinal direction X to the outside in the longitudinal direction X, and are joined to each other by known joining means at the extending portions. Yes.
As shown in FIG. 1, the absorber 4 has a substantially rectangular shape with rounded corners in plan view. The top sheet 2 and the back sheet 3 may be bonded to the absorber 4 with an adhesive.

  The left and right sides along the longitudinal direction X of the absorbent main body 10 along the longitudinal direction X of the skin facing surface (skin facing surface of the topsheet 2), as shown in FIG. A pair of side sheets 5, 5 is arranged over substantially the entire length in the longitudinal direction X of the absorbent main body 10 so as to overlap the part. Each of the pair of side sheets 5 and 5 has an inner side portion in the width direction Y formed on a skin contact surface of the top sheet 2 by a joint portion 8 having a line-of-view shape formed by a known joining means. The outer side is extended from the left and right side edges along the longitudinal direction X of the absorber 4 to the outer side in the width direction Y, and the extended portion is described above by a known bonding means. It is joined to the extending part of the back sheet 3.

  The back sheet 3 and the side sheet 5 extend from the left and right side edges along the longitudinal direction X of the absorber 4 to the outside in the width direction Y to form side flaps, and the side flaps, as shown in FIG. A large bulge outwards in the width direction Y at the excretory part facing part B, and a pair of wings 6A, 6A are extended on the left and right sides of the absorbent main body 10 by the flank of the side flaps in the width direction Y. .

  As shown in FIG. 1, a first folding line 11 and a second folding line 12 extending in the width direction Y are formed in the absorbent main body 10, and the absorbent main body 10 is moved along the both folding curves 11 and 12. It is made foldable. The excretory part facing part B exists between the folding curves 11 and 12. Both folding curves 11 and 12 are formed so that their extension lines (the portion protruding from the napkin 1 in the one-dot broken line showing the folding curves 11 and 12 in FIG. 1) do not pass through the wing 6A. In the present embodiment, as shown in FIG. 1, the extension lines of both folding curves 11 and 12 pass outward in the longitudinal direction X from the region sandwiched between the bases 71 and 72 of the wing 6A, respectively. Is formed so as not to pass through the wing 6A.

  Note that the bases 71 and 72 of the wing portion 6A are the connecting portion between the linear side edge along the longitudinal direction X of the absorbent main body 10 and the peripheral edge 60 of the wing 6A and the vicinity thereof, and the peripheral edge of the napkin 1 It is a site | part following the wing 6A from the absorptive main body 10 in FIG. Further, the imaginary straight line 14 (see FIGS. 1 and 3) extending in the longitudinal direction X by connecting the base 71 on one side (front side) and the base 72 on the other side (rear side) in the longitudinal direction X is absorbed by the wing 6A. When the wing 6A is folded when the napkin 1 is attached, it can function as a fold line.

  In order to fold the napkin 1 into an individual form, a portion (front portion A) located on one side in the longitudinal direction X from the first folding line 11 is formed along the first folding line 11 with the topsheet 2 facing inward. While bending in the longitudinal direction X, a portion (rear part C) located on the other side in the longitudinal direction X from the second folding line 12 is placed in the longitudinal direction X along the second folding line 12 with the topsheet 2 inside. The napkin 1 is folded in three by folding the folded front part A and rear part C on a part (excretion part facing part B) sandwiched between both folding curves 11 and 12.

  One of the main features of the absorbent article of the present invention lies in the shape of the wing in plan view. The points are: A) the wing has no corners, and B) the wing is asymmetrical in the longitudinal direction of the absorbent main body. The length along the longitudinal direction of the wing is 3 points that are the longest in the vicinity of the boundary line between the wing and the absorbent main body. Satisfying these three points can effectively prevent inconvenience that the wing breaks at an unintended part during or during the mounting operation.

  In the present embodiment, corresponding to A), as shown in FIG. 1, the peripheral edge 60 of the wing 6A is composed of only a curved line 61 that protrudes outward from the wing 6A. By configuring the wing periphery only from such a convex curve and not including a straight line, the outer shape (contour) of the wing does not include a corner. As described above, folds at the unintended part of the wing during mounting work or during mounting (yore / turn) tend to occur starting from the corner of the wing. Such inconvenience can be effectively prevented.

  As described above, the wing according to the present invention is limited to a wing 95 having a peripheral edge formed only by a convex curve toward the outer side of the wing. Therefore, the wing 95 shown in FIG. Wings that include a straight line at the periphery and a curved line that protrudes inward of the wing, such as an isosceles trapezoidal wing, are outside the scope of the present invention. For example, the wing 6P shown in FIG. 6A includes a curved line 62 that protrudes inward in addition to a curved line 61 that protrudes outward from the wing 6P. It is outside the scope of the invention.

  Further, in the present embodiment, corresponding to B), as shown in FIG. 3, the maximum width portion of the wing 6A (the portion that protrudes most outward in the width direction Y. The portion having the maximum width L1). ), The front side (one side) in the longitudinal direction X of the wing 6A is the front side of the wing (one side) 65, and the rear side (the other side) is after the wing. A region corresponding to two-thirds of the longitudinal direction near the imaginary straight line 13 on the wing front side 65 by dividing the wing front side 65 and the wing rear side 66 into three in the longitudinal direction X. Is designated as the wing one-side specific area 65C, and the area corresponding to two-thirds in the longitudinal direction near the virtual straight line 13 on the wing rear side 66 is designated as the wing other-side specific area 66C. Curvature radius R65C wings periphery 60 at, are made different from each other R66C. That is, in the present embodiment, the radii of curvature (curvature) of the peripheral edge 60 of the wing 6A are made different between the one side and the other side in the longitudinal direction X, so that the plan view shape of the wing 6A is an asymmetrical shape.

  More specifically, in the present embodiment, as shown in FIG. 3, the maximum width portion of the wing 6A (the portion overlapping the virtual straight line 13) is the center in the longitudinal direction X of the wing 6A (reference numeral 15 in FIG. 3). The wing front side (the wing one side) specific area 65C is biased to the front side (one side) than the straight line shown (the portion overlapping the wing 6A that bisects the longitudinal direction X), and the wing front side (the wing one side) is located on the wing rear side (the other side of the wing) The curvature radius of the wing periphery 60 is smaller than that of the specific region 66C. That is, in the present embodiment, the maximum width portion of the wing 6A is biased forward, and the curvature radius R65C of the wing peripheral edge 60 of the wing front specific area 65C and the curvature radius of the wing peripheral edge 60 of the wing rear specific area 66C. The magnitude relationship of R65C <R66C is established with R66C, the curvature of the front specific area 65C is larger than that of the rear specific area 66C, and the bending degree of the wing peripheral edge 60 is tight. Yes.

  The wing 6A is divided into a front side 65 and a rear side 66 in the longitudinal direction X, and the maximum width portion of the wing 6A, particularly the central portion in the width direction Y of the maximum width portion, folds the wing 6A during the mounting operation. This is the part where the finger is applied, and the part where the force to turn back the wing 6A is directly transmitted. As described above, the folding of the wing 6A at the unintended part during the mounting work or during the mounting (turning and turning) It tends to occur as the distance from the maximum width portion of the wing 6A increases. Therefore, as shown in FIG. 3, when the maximum width portion of the wing 6A (the portion overlapping the virtual straight line 13) is biased to the front side in the longitudinal direction X, the wing peripheral edge 60 of the wing front side 65 is relatively Since the force to turn back the wing 6A is easy to be transmitted near the large portion, the wing folds are relatively difficult to occur, whereas the wing peripheral edge 60 on the wing rear side 66 is relatively far from the maximum width portion and Since the folding force is difficult to be transmitted, the wing is relatively easily broken. Therefore, in the present embodiment, the wing rear side 66 (specific region), which is relatively susceptible to folds, is formed in order to make the shape of the wing 6A in a plan view asymmetric in the longitudinal direction X in correspondence with B). 66C) is set to be larger than the radius of curvature of the wing front side 65 (specific region 65C), where the wings are less likely to be bent (the relationship between the magnitudes of the curvatures is reversed). The wing rear side 66, which is inherently easily broken, is made difficult to break.

The curvature radius R65C of the wing peripheral edge 60 of the wing front specific area 65C and the curvature radius R66C of the wing peripheral edge 60 of the wing rear specific area 66 are respectively calculated by the following equations.
Curvature radius ^{= (W 2/4 + h} 2) / 2h

  The above formula will be described with reference to FIG. 3 by taking as an example the case where the radius of curvature R65C of the wing peripheral edge 60 of the wing front specific area 65C is calculated. In the above formula, W is the terminal Q of the wing peripheral edge 60 of the wing front specific area 65C. , R is the length of the line segment, and h is a point that intersects the midpoint S when a perpendicular passing through the midpoint S of the ends Q, R is drawn and the intersection of the perpendicular and the wing periphery 60 is P. This is the length of the line segment connecting P. Thus, the curvature radius R65C is calculated as the radius of a circle passing through the three points P, Q, and R on the wing periphery 60. The curvature radius R66C of the wing peripheral edge 60 of the wing rear side specific area 66C can be calculated in the same manner.

From the viewpoint of ensuring the above-described operational effects, it is preferable to set the dimensions and the like of each part in the wing 6A as follows.
The radius of curvature R65C of the wing peripheral edge 60 of the wing front side specific region 65C is preferably 10 mm or more, more preferably 15 mm or more, and preferably 60 mm or less, more preferably 50 mm or less, more specifically preferably 10 to 60 mm. More preferably, it is 15-50 mm.
The radius of curvature R66C of the wing peripheral edge 60 of the wing rear side specific region 66C is preferably 15 mm or more, more preferably 30 mm or more, and preferably 100 mm or less, more preferably 80 mm or less, more specifically, preferably 15 to 100 mm, more preferably 30 to 80 mm.
The ratio (the former / the latter) of the radius of curvature R65C and the radius of curvature R66C is preferably 0.1 to 0.9, more preferably 0.2 to 0.8.

The maximum width L1 (see FIGS. 1 and 3) of the wing 6A is preferably 20 mm or more, more preferably 25 mm or more, and preferably 40 mm or less, more preferably 35 mm or less, more specifically, preferably 20 to It is 40 mm, more preferably 25 to 35 mm.
The length L2 of the boundary line 14 between the wing 6A and the absorbent main body 10 (refer to FIG. 3) is preferably 55 mm or more, more preferably 70 mm or more, and preferably Is 125 mm or less, more preferably 110 mm or less, more specifically, preferably 55 to 125 mm, and more preferably 70 to 110 mm.
The separation distance L3 (see FIG. 3) between the imaginary straight line 13 passing through the maximum width portion of the wing 6A and the straight line 15 that bisects the wing 6A in the longitudinal direction X is preferably 2 mm or more, more preferably 5 mm or more, and preferably It is 30 mm or less, More preferably, it is 20 mm or less, More specifically, Preferably it is 2-30 mm, More preferably, it is 5-20 mm. The separation distance L3 is an index of the degree of deviation in the longitudinal direction X of the maximum width portion of the wing 6A (the degree of separation from the center of the wing in the longitudinal direction).

  In the present embodiment, corresponding to C), the length along the longitudinal direction X of the wing 6A is the vicinity of the boundary line 14 between the wing 6A and the absorbent main body 10 (within 3 mm from the boundary line 14). (Region) is the longest. That is, as shown in FIG. 1 and FIG. 3, the length along the longitudinal direction X of the part located outward in the width direction Y from the boundary line 14 in the napkin 1 is outward from the boundary line 14 in the width direction Y. Accordingly, the length along the longitudinal direction X of the wing 6A is the longest in the vicinity of the boundary line 14, and the maximum length thereof is the boundary line 14 between the wing 6A and the absorbent main body 10. It is approximately equal to the length L2.

  Thus, since the wing according to the present invention is limited to the one that satisfies the above C), the wing that does not satisfy the above C), for example, the wing 6Q shown in FIG. 6B is outside the scope of the present invention. . In the wing 6Q, as shown in FIG. 6B, the length along the longitudinal direction X gradually increases from the boundary line 14 toward the approximate center in the width direction Y, and in the vicinity of the boundary line 14. It is not the longest, but is the longest at the center in the width direction (the portion overlapping the virtual straight line 16 parallel to the boundary 14) located outside the vicinity of the boundary 14 in the width direction Y. The wing 6Q that does not satisfy the above C) has a front and rear end portion (a portion surrounded by a dotted line in FIG. 6B) that has the longest length along the longitudinal direction X in the vicinity thereof. The wings 6Q of the wings 6Q may be bent into unintended shapes starting from the bases 71 and 72, and twisting or turning may occur. On the other hand, since the wing according to the present invention satisfies the above C), such unintentional folds are unlikely to occur.

  In the present embodiment, the length along the width direction Y of each of the pair of wings 6A and 6A (the maximum width L1) is a region sandwiched between the pair of wings 6A and 6A in the absorbent main body 10 (an excretory part facing part). It is less than half the length L4 (see FIG. 1) in the width direction Y of B). By adopting such a configuration, when the napkin 1 is attached, when the pair of wings 6A and 6A are folded back to the non-skin facing surface side of the absorbent main body 10, the width direction Y of both folded wings 6A and 6A Since the tip portions of the wings are not easily overlapped, wrinkles are not easily formed on the wing 6A during the mounting of the napkin 1, and the wings are not easily formed.

  Further, in the wearing state of the napkin 1, the central part in the width direction Y of the excretory part facing part B is sandwiched between the thighs of the wearer and compressed from both sides in the width direction Y. As a result, the skin-facing surface side protrudes toward the wearer's skin side, and a concave recess is formed toward the skin side on the non-skin-facing surface side of the central portion opposite to the wearer. The length (the maximum width L1) along the width direction Y of each of the pair of wings 6A and 6A is the width direction Y of the region (excretion portion facing portion B) sandwiched between the wings 6A and 6A in the absorbent main body 10. If it exceeds half of the length L4, the pair of wings 6A, 6A folded back to the non-skin facing surface side of the excretory part facing part B straddle the central part in the width direction Y of the excretion part facing part B, respectively. Therefore, it bends according to the shape of the dent, and the wing 6A There is a possibility to induce Les and a turn-up. On the other hand, when the length along the width direction Y of the wing 6A (the maximum width L1) is equal to or less than half the length L4 of the absorbent body 10 in the width direction Y as in the present embodiment, the napkin 1 In the mounted state, since the wing 6A is not applied to the portion where the depression is formed in the excretory part facing part B, the bending of the wing 6A due to the depression and the twisting and turning due thereto are further effectively prevented.

  From the viewpoint of more surely exhibiting such effects, the maximum width L1 (see FIG. 3) of the wing 6A and the length in the width direction Y of the region sandwiched between the pair of wings 6A and 6A in the absorbent main body 10 The ratio (the former / the latter) to the length L4 (see FIG. 1) is preferably 0.20 to 0.48, more preferably 0.25 to 0.40. The length L4 of the absorbent main body 10 is preferably 60 mm or more, more preferably 70 mm or more, and preferably 130 mm or less, more preferably 120 mm or less, more specifically preferably 60 to 130 mm, and still more preferably. Is 70-120 mm.

  As shown in FIG. 1, wing adhesive portions 7 for fixing the wing 6A to clothing such as underwear are provided on the non-skin facing surfaces of the pair of wings 6A and 6A, respectively. The wing adhesive portion 7 has a rectangular shape in plan view. The wing adhesive portion 7 is provided by applying a hot melt adhesive to a predetermined location, and is covered with a release sheet (not shown) made of a film, a nonwoven fabric, paper or the like before the napkin 1 is used.

  In the present embodiment, as shown in FIG. 1, the center of the maximum width portion (the portion having the maximum width L1) of the wing 6A in the width direction Y [the straight line indicated by reference numeral 16 in FIG. A portion of the wing adhesive portion 7 exists on the outer side in the width direction Y from the portion overlapping with the bisecting width direction central straight line). In general, a wing twist or turn is less likely to occur at a portion closer to the boundary line between the wing and the absorbent body, and is more likely to occur as the distance from the boundary line (closer to the periphery of the wing). In addition, by making a part of the wing adhesive portion 7 exist on the outer side of the width direction Y from the center of the width direction Y of the maximum width portion of the wing 6A, the twisting and turning of the wing 6A can be more effectively performed. Can be prevented. The main reason is closely related to the improvement of the rigidity of the peripheral edge 60 of the wing 6A and the vicinity thereof (hereinafter also referred to as the wing peripheral part) and the expression of adhesiveness to clothes such as shorts, which are caused by the installation of the wing adhesive part 7. Involved. That is, the presence of the wing adhesive portion 7 at or near the wing peripheral portion where twisting or curling is likely to occur increases the rigidity of the wing peripheral portion itself. Therefore, when the napkin 1 is attached to the underwear, In this case, the wing peripheral edge or the vicinity thereof is adhered to the underwear via the wing adhesive part 7 even when the napkin 1 is being attached. It will be difficult for twisting and turning. In addition, in the wing having the conventional shape as shown in FIG. 5, if the adhesive portion is arranged on the wing peripheral portion where the twist or turn is likely to occur, when the twist or turn occurs, part of the adhesive portion and other portions However, as described above, the wing 6A according to the present embodiment is designed so that the wing 6A itself is less likely to be twisted or turned up. From the viewpoint of improving the rigidity of the peripheral edge of the wing and expressing the adhesiveness, it is possible to adopt an appropriate arrangement of the wing adhesive portion 7 described above without worrying about self-adhesion of the adhesive portion found in the conventional wing. it can.

  When the formation material of each part in the napkin 1 is demonstrated, the various things conventionally used in the said technical field can be especially used as the surface sheet 2 and the back surface sheet 3 without a restriction | limiting. As the surface sheet 2, for example, liquid permeable sheets such as various nonwoven fabrics and perforated films subjected to a hydrophilic treatment can be used. The back sheet 3 may be liquid-impermeable or liquid-permeable, for example, a resin film that does not have moisture permeability, a resin film that has micropores and moisture permeability, and a nonwoven fabric such as a water-repellent nonwoven fabric, A laminate of the sheet and other sheets can be used.

  As a material constituting the absorbent body 4, various materials conventionally used in the technical field can be used without particular limitation, for example, a fiber assembly made of hydrophilic fibers such as wood pulp and synthetic fiber, or A fiber assembly in which a particulate water-absorbing polymer is held can be used. The absorbent body 4 may include a liquid-retaining absorbent core made of the fiber assembly and the like, and a liquid-permeable core wrap sheet that covers the absorbent core. The absorbent core and the core wrap sheet may be joined to each other at a predetermined site by a joining means such as a hot melt adhesive. As a core wrap sheet which coat | covers an absorptive core, water-permeable sheets, such as paper, such as tissue paper, various nonwoven fabrics, and an apertured film, can be used, for example.

  As the side sheet 5, various types conventionally used in the technical field can be used without particular limitation. For example, a water-repellent nonwoven fabric, a sheet made of a resin film, a laminate of a nonwoven fabric and a resin film, for example Etc. can be used. In particular, it is preferable to use a water-repellent air-through nonwoven fabric from the viewpoints of good touch and prevention of lateral leakage.

  The napkin 1 according to the present embodiment is used by being attached to clothing such as underwear, similarly to a sanitary napkin having a known wing. When using the napkin 1 of the present embodiment, the pair of wings 6A, 6A are folded back to the non-skin facing surface side of the absorbent main body 10, and the non-skin facing surface (outer surface) of the clothing is provided via the wing adhesive portion 7. ). According to the napkin 1 of the present embodiment, the plan view shape of the wing 6A is devised based on the points A) to C), so that the wing 6A breaks at an unintended part during or during the mounting operation. It is difficult, and it is difficult for the wing 6A to be twisted or turned over, so that the napkin 1 is stably fixed to clothes such as underwear without causing a decrease in wearing feeling due to the wing 6A. Excellent leakage prevention effect. In the present embodiment, the length along the width direction Y of each of the pair of wings 6A, 6A is the width of the region (excretion portion facing portion B) sandwiched between the pair of wings 6A, 6A in the absorbent main body 10. Since the length is less than half of the length in the direction Y, the above effect (the effect of preventing wings 6A from turning and turning over) can be achieved more reliably in combination with the action of the plan view shape of the wing 6A. .

  FIG. 4 shows another embodiment (wing 6B) of the wing according to the present invention. In other embodiments to be described later, constituent parts different from those of the above-described embodiment (wing 6A) are mainly described, and the same constituent parts are denoted by the same reference numerals and description thereof is omitted. The description of the above embodiment is applied as appropriate to components that are not particularly described.

  The wing 6B is different from the wing 6A described above in terms of a specific form of B). In the wing 6B, as shown in FIG. 4, the maximum width portion of the wing 6B (portion overlapping the virtual straight line 13). Is biased to the rear side (the other side) from the center in the longitudinal direction X of the wing 6B [the portion overlapping the straight line indicated by reference numeral 15 in FIG. 4 (the straight line that bisects the wing 6B in the longitudinal direction X)] The radius of curvature of the wing peripheral edge 60 is smaller in the side (wing other side) specific area 66C than in the wing front side (wing one side) specific area 65C. That is, in the embodiment shown in FIG. 4, the maximum width portion of the wing 6B is biased to the rear side, and the radius of curvature R65C of the wing peripheral edge 60 of the wing front side specific area 65C and the wing peripheral edge of the wing rear side specific area 66C. The relationship R65C> R66C is established between the radius of curvature R66C of 60 and the rear specific area 66C has a larger curvature than the front specific area 65C, and the degree of curvature of the wing peripheral edge 60 is It is getting tight. In short, the wing 6B is the same as that obtained by reversing the longitudinal direction X of the wing 6A in the napkin 1. The same effect as that of the napkin 1 provided with the wing 6A described above can be obtained by the absorbent article (sanitary napkin) provided with the wing 6B. However, in general, when the sanitary napkin is worn, the external force applied to the wing due to the movement of the wearer is larger on the rear side in the longitudinal direction than on the front side. By deviating to the front side (one side) in the longitudinal direction X, the area on the rear side (the other side) is relatively small (see FIG. 3). As compared with the wing 6B in which the area of) is relatively large, twisting and turning are less likely to occur.

The dimensions and the like of each part in the wing 6B are preferably set as follows.
The radius of curvature R65C of the wing peripheral edge 60 of the wing front side specific region 65C is preferably 15 mm or more, more preferably 30 mm or more, and preferably 100 mm or less, more preferably 80 mm or less, more specifically preferably 15 to 100 mm. More preferably, it is 30-80 mm.
The radius of curvature R66C of the wing peripheral edge 60 of the wing rear side specific region 66C is preferably 10 mm or more, more preferably 15 mm or more, and preferably 60 mm or less, more preferably 50 mm or less, more specifically preferably 10 to 10 mm. It is 60 mm, more preferably 15 to 50 mm.
The ratio of the curvature R65C to the curvature R66C (the former / the latter) is preferably 1.1 to 10, more preferably 1.2 to 5.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, the position of the wing is not limited to the central portion in the longitudinal direction of the absorbent main body, and may be on the front side in the longitudinal direction (one side) or on the rear side (the other side). Moreover, although the said embodiment had a pair of wings, you may have two or more pairs of wings, for example, in the napkin 1 of the said embodiment, a pair of wings 6A and 6A located in the excretion part opposing part B In addition, another pair of wings (rear flaps) located in the rear portion C may be provided. In that case, another pair of wings (rear flaps) may not have a shape unique to the wing 6A described above.

  Moreover, the non-skin opposing surface of the absorptive main body 10 may be provided with a main body adhesive portion that fixes the absorptive main body 10 to clothing such as underwear. Moreover, the absorbent article of the present invention can be applied to panty liners (origami sheets), incontinence pads, etc. in addition to sanitary napkins.

1 Sanitary napkin (absorbent article)
2 Top sheet 3 Back sheet 4 Absorber 5 Side sheets 6A, 6B, 6P, 6Q Wing 60 Edge of wing 61 Curve 65 convex outward of wing Front side of wing (one side of wing)
65C Wing front specific area 66 Wing rear side (Wing other side)
66C Wing rear side specific area 7 Wing adhesive part 71, 72 Wing root 10 Absorbent body 11 First folding line 12 Second folding line 13 Virtual straight line 14 extending in the width direction through the maximum width part of the wing 14 Wing and absorbency Boundary line A with the main body Front part B Excretion part opposite part C Rear part

Claims (6)

An absorbent article having a vertically long absorbent main body having a liquid-retaining absorbent body and a pair of wings extending outward in the width direction from both side portions along the longitudinal direction of the absorbent main body. ,
The peripheral edge of the wing is composed only of a convex curve toward the outside of the wing,
With one virtual straight line extending in the width direction passing through the maximum width portion of the wing as a boundary, one side of the longitudinal direction of the wing is defined as one side of the wing, the other side as the other side of the wing, and Each side of the wing and the other side of the wing are divided into three equal parts in the longitudinal direction, and a region corresponding to two-thirds of the longitudinal direction near the virtual straight line on one side of the wing When the region corresponding to two-thirds of the longitudinal direction near the virtual straight line is the specific region on the other side of the wing, the radii of curvature of the peripheral edges of the wings in both specific regions are different from each other,
The length of the wing along the longitudinal direction is the longest absorbent article in the vicinity of the boundary line between the wing and the absorbent main body.   The maximum width portion of the wing is biased to the one side from the longitudinal center of the wing, and the wing one side specific region is a radius of curvature of the peripheral edge of the wing as compared to the wing other side specific region. The absorbent article of Claim 1 with small.   The maximum width portion of the wing is biased to the other side from the longitudinal center of the wing, and the wing other side specific region is a radius of curvature of the wing periphery compared to the wing one side specific region. The absorbent article of Claim 1 with small.   The length along the width direction of each of the pair of wings is not more than half of the length in the width direction of the region sandwiched between the pair of wings in the absorbent main body. Absorbent article as described in 1.   A folding line extending in the width direction is formed on the absorbent body so that an extension line of the folding line does not pass through the wing, and the absorbent body can be folded along the folding line. The absorptive article according to any one of claims 1 to 4. On one side of the wing, an adhesive part for fixing the wing to clothing is provided,
The absorbent article as described in any one of Claims 1-5 in which a part of said adhesion part exists in the outer side of this width direction rather than the center of the said width direction of the maximum width part of the said wing. .

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