JP2012157595A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower basis weight of wings and to reduce discomfort during wearing in an absorbent article with wings, such as an incontinence pad or a sanitary napkin fixed to a crotch portion of shorts.SOLUTION: The absorbent article comprises: an absorbent body provided with a liquid-permeable surface sheet, a liquid-impermeable back surface sheet and a liquid-retaining absorber interposed between both of the sheets; and a pair of wings extending from both side edge parts of the absorbent body. The surface sheet and the wings are made of separate nonwoven fabrics, the fiber alignment of the surface sheet is in a longitudinal direction, and the fiber alignment of the wings is in a width direction. A plurality of lines of fixing adhesive parts are provided on a back surface side of the absorbent body and a back surface side of each wing, and extending directions of the fixing adhesive parts coincide with the directions of the fiber alignments.

Description

  The present invention relates to an absorbent article such as a light incontinence pad, a sanitary napkin, and a panty liner that are used by being fixed to underwear such as shorts.

  In recent years, many absorbent articles such as sanitary napkins, panty liners, light incontinence pads, and urine collecting pads have been used to absorb excrement such as menstruation and urine. These absorbent articles are often provided with wings on both sides in the longitudinal direction. At the time of wearing, the wing is folded back to the lower part of the crotch portion of the underwear, so that the edge of the underwear is not soiled by excrement. Usually, the wing is provided with an adhesive means for attaching to the underwear. When the wing is attached to the lower side of the crotch portion of the undergarment and bonded, the absorbent article itself is less likely to be displaced and stable wearing is possible. In general, the wing is configured such that a member constituting the main body of the absorbent article, for example, a member in which a back sheet and a front sheet are joined is protruded laterally from the main body of the absorbent article. When the wing is formed by joining the back sheet and the top sheet, the manufacturing method thereof is to form a laminate with the absorber sandwiched between the back sheet and the top sheet, and from this laminate, an oval shape or There is a manufacturing method of cutting out an hourglass-shaped main body and a wing. In this case, it is necessary to use what was previously widened as the width dimension of the back sheet material and the top sheet material. And most of the top sheet material and the back sheet material left after cutting are wasted. Therefore, in recent years, from the viewpoint of reducing the amount of raw fabric used and the amount of trim generated, a main body without a wing is formed between the top sheet and the back sheet, while the top sheet and the back sheet are formed. A pair of wing pieces are joined to the inside of both side portions of the main body portion from a raw material different from the above to form a wing portion. And since such a wing part is easy to remove | deviate from a main-body part, the method of fixing a wing part and a main-body part is proposed variously.

  For example, Patent Document 1 fixes each wing piece to a skin contact sheet with a skin contact side joint, and also fixes the wing piece to an underwear contact sheet with an underwear contact side joint. The width is formed smaller than the width of the underwear contact side joint, and the outermost end position of the width of the skin contact side joint is arranged outside the outermost end position of the width of the underwear contact side joint. Accordingly, it is disclosed that an absorbent article having good operability of the wing part, prevention of wobbling / displacement and good touch can be obtained.

  Moreover, in patent document 2, when manufacturing the absorbent article which has a wing-shaped flap, while making it the transverse flow system which made the longitudinal direction axis | shaft of the absorbent article orthogonal to the production line, normal arrangement | positioning and the upper and lower sides were reversed. Under the condition that the reverse arrangement is arranged alternately and the absorbent body is not aligned to the right and left with respect to the production line direction, but on the same straight line, the absorbent article of the normal arrangement and the absorbency of the reverse arrangement The outline of the wing-shaped flap is determined so that the rear outlines of the wing-shaped flap of the article coincide with each other.

Japanese Patent No. 4372628 JP 2010-188142 A

When the absorbent article is mounted, the wing member is mounted so as to be wound around the crotch portion of the underwear, so that a considerable load is applied to the wing member. In order not to cause problems such as tearing and tearing during mounting and use, the strength of the wing member itself and the bonding strength between the wing member and the main body are required.
However, as shown in FIG. 3 of Patent Document 1, when the wing piece is formed in the process, the wing member is cut in the same direction as the flow direction of the original fabric. The fiber orientation is along. In this case, since it is difficult to ensure strength against pulling during mounting, it is necessary to take measures such as increasing the weight of the member.
The strength of the wing can be prevented by increasing the weight or by increasing the joint strength with the main body, but the rigidity of the member increases when the weight is increased, and heat sealing is performed to increase the joint strength. And increasing the coating of adhesive tends to harden the boundary between the wing and the body. If the part touches the skin, the feeling of wearing is bad.

  In the invention of Patent Document 2, as shown in FIG. 9 (A), since the production line is in a flow perpendicular to the product longitudinal direction, the fiber orientation of the nonwoven fabric among the materials constituting the product is It is orthogonal to the product longitudinal direction. When absorbing the liquid, the absorbed liquid is more likely to diffuse in both directions than in the front-rear direction due to the effect of fiber orientation of the topsheet. As a result, side leakage is likely to occur, and the absorption capacity of the absorber cannot be fully utilized. When the absorption capacity is increased in order to prevent side leakage and the bulk of the absorber itself is increased, the wearing feeling becomes worse. In particular, light incontinence pads are not always used during menstruation like a napkin, but are basically always used, and the replacement frequency is less than that of a napkin (generally 1 sheet / day). A more comfortable fit is required.

  This invention solved the said subject by making the fiber orientation of the nonwoven fabric which forms a wing orthogonal to the fiber orientation of the nonwoven fabric which forms the surface sheet of an absorptive main body.

  The present invention relates to an absorbent main body comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between the two sheets, and both side edges of the absorbent main body. An absorbent article having a pair of extending wings, wherein the topsheet and the wing are composed of separate nonwoven fabrics, the fiber orientation of the topsheet is in the longitudinal direction, and the fiber orientation of the wing is in the width direction The absorbent article is characterized.

Preferably, a plurality of fixing adhesive portions are provided on the back surface side of the absorbent main body and the back surface side of each wing, respectively, and the extending direction of the multiple strip fixing adhesive portions provided on the back surface side of the absorbent main body is the surface. The direction in which the plurality of fixing adhesive portions extending on the back side of the wing extend in the direction of fiber orientation of the sheet matches the direction of fiber orientation in the wing.
Preferably, the pair of wings is formed of an integral nonwoven fabric.
Preferably, the fabric weight of the nonwoven fabric which comprises a wing is 15-40 g / m < ² >.
Preferably, the wing is joined to the top sheet side of the back sheet.
Preferably, the base of the wing is constricted.
Preferably, the absorbent article is a light incontinence pad.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which can be used comfortably for a long time is obtained.

FIG. 1 is a partially cutaway plan view of one embodiment of the absorbent article of the present invention. FIG. 2 is a bottom view of the absorbent article of FIG. FIG. 3 is a schematic cross-sectional view showing a cross section taken along line AA of FIGS. 1 and 2. FIG. 4 is a plan view showing an example of the shape of the wing.

  Hereinafter, the present invention will be described with reference to the drawings, but the present invention is not limited to those described in the drawings.

  FIG. 1 is a partially cutaway plan view of one embodiment of the absorbent article of the present invention. FIG. 2 is a bottom view of the absorbent article of FIG. FIG. 3 is a schematic cross-sectional view showing a cross section taken along line AA of FIGS. 1 and 2. The absorbent article 1 includes an absorbent main body 5 including a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a liquid-retaining absorbent 4 interposed between the two sheets, and the absorbent. And a pair of wings 7 extending from both side edges 6 of the main body.

  The top sheet 2 and the wing 7 are composed of separate nonwoven fabrics. That is, the top sheet 2 and the wing 7 are independent members and are not integrated. The material forming the top sheet 2 is a nonwoven fabric, and the material forming the wings 7 is also a nonwoven fabric. The nonwoven fabric forming the top sheet 2 and the nonwoven fabric forming the wings 7 may be the same or different.

The fiber orientation of the top sheet 2 is the longitudinal direction Y, and the fiber orientation of the wing 7 is the width direction X. Here, the fiber orientation is the fiber orientation when the surface of the nonwoven fabric is viewed. Here, with respect to the nonwoven fabric, “the fiber orientation is in the longitudinal direction” means that 100% of the total fiber weight constituting the nonwoven fabric is fiber-oriented in the longitudinal direction Y, and 50% or more is in the longitudinal direction Y. In contrast, it refers to those having a fiber orientation in the range of −45 ° to + 45 °. The measurement method generally used can be used for the measuring method of the fiber orientation of a nonwoven fabric. For example, it can be set as the measuring method according to the fiber orientation test method by the zero distance tensile strength of TAPPI standard method T481. Further, as a simple method, the fiber orientation may be measured from the tensile strength ratio (MD / CD) between the production line direction (MD) of the nonwoven fabric and its orthogonal direction (CD). As a specific procedure of the simple measurement method, a test piece of SHIMADZU autograph (AGS-G100N) was used, a test piece having a length of 200 mm and a width of 50 mm, a crosshead speed of 500 mm / min, and a space between chucks. A test is performed under the condition of a distance of 150 mm, the tensile strength is obtained from the maximum load at the time of tension, and the elongation is calculated from the elongation at the time of the maximum load. If the ratio of tensile strength (MD / CD) is greater than 1, it can be said that the nonwoven fabric has fiber orientation in the MD direction.
The nonwoven fabric is made by forming fibers into a sheet, forming a web, and bonding or intertwining the fibers in the web into a cloth shape, and then finishing the fabric. When the nonwoven fabric is produced on an industrial scale, a continuous production apparatus is used, which is produced as a long sheet. At that time, unless special treatment is performed, the fibers constituting the nonwoven fabric tend to be aligned in the longitudinal direction of the long sheet, that is, the machine direction (direction in which the web or the sheet proceeds in the production apparatus). Therefore, the normal nonwoven fabric industrially produced as a long sheet has a fiber orientation. In this invention, when producing the surface sheet 2 from the nonwoven fabric which has such a fiber orientation, it cuts so that the fiber orientation of a nonwoven fabric may become the longitudinal direction of the surface sheet 2. FIG. On the other hand, when producing the wing 7 from a nonwoven fabric, it cuts so that the fiber orientation of a nonwoven fabric may become the width direction of the wing 7. FIG. By carrying out like this, the fiber orientation of the surface sheet 2 and the fiber orientation of the wing 7 are orthogonal.

Since the liquid easily diffuses along the fiber orientation, on the absorbent main body side, the liquid diffuses in the longitudinal direction and can be absorbed efficiently, and the wing is provided separately, Less likely to induce lateral leakage on the surface side. As a result, the absorbent body need not have an extra absorption function and can be made thin.
By arranging the fiber orientation of the nonwoven fabric that forms the wing so as to be orthogonal to the longitudinal direction of the absorbent main body, the strength of the wing can be increased, so high-weight materials are used for the wing member to ensure the strength of the wing There is no need to perform laminating or laminating. That is, a low basis weight material or a highly breathable material can be used for the wing member.
Since a low weight member can be selected as the wing member, the portion where the underwear is wrapped when using the absorbent article can be made to have low rigidity, or the unevenness can be reduced, and can be worn comfortably even for a long time.
In addition, when a material having high air permeability is used for the wing member, the air permeability of the portion where the absorbent main body and the wing overlap at the time of wearing can be improved, so that the wet feeling can be reduced.
Therefore, both the good absorption efficiency of the absorbent main body and the good feeling of wearing the wing are satisfied.
Further, the members constituting the absorbent main body are fiber-oriented in the longitudinal direction of the absorbent article, whereas the wing members are fiber-oriented in the width direction of the absorbent article. Repels against the force applied from the width direction of the, can be difficult to twist.

  Also, since the wing member has a structure separate from the absorbent main body, the adhesive strength between the absorbent main body and the wing member is important, but the nonwoven fabric forming the absorbent main body and the nonwoven fabric fibers forming the wing Since the orientations are orthogonal, the number of points where they are entangled is greater than when the fibers are oriented in parallel, and the adhesive strength is increased. That is, the bonding conditions can be set lower than in the parallel case. As a result, since the conditions of the bonding method (heat sealing, adhesive) are relaxed, it can be avoided that the portion becomes hard. Therefore, the uncomfortable feeling at the crotch portion at the time of wearing is reduced, and it can be used comfortably even when used for a long time.

  On the back side of the absorbent article 1, it is preferable to provide fixing adhesive portions 21 and 22 to which an adhesive for fixing to underwear such as shorts is applied. It is preferable to provide fixing adhesive portions on both the back side of the absorbent main body 5 and the back side of the wing 7. The adhesive part 21 for fixation provided in the back surface side of the absorptive main body 5 may be one, and may be divided | segmented and provided in multiple. The number of fixing adhesive portions 22 provided on the back side of the wing 7 may be one or may be divided into a plurality. Preferably, as shown in FIG. 2, a plurality of fixing adhesive portions 21 are provided on the back surface side of the absorbent main body 5, and a plurality of fixing adhesive portions are provided on the back surface side of the wing 7. 22 is provided. The extending direction of the plurality of fixing adhesive portions 21 provided on the back surface side of the absorbent main body 5 coincides with the fiber orientation direction of the top sheet 2, and the plurality of fixing adhesive materials provided on the back surface side of the wing 7. The extending direction of the portion 22 preferably coincides with the fiber orientation direction of the wing 7. By aligning the extending direction of the adhesive strips for fixing multiple strips with the direction of fiber orientation, when transferring the adhesive, it can be stably transferred because there are few convex surfaces, avoiding remaining adhesive on the shorts after use it can. Further, the extending direction of the plurality of fixing adhesive portions 21 provided on the back side of the absorbent main body 5 coincides with the longitudinal direction of the absorbent article, and the plurality of fixing adhesives provided on the back side of the wing 7. Since the extending direction of the portion 22 is made to coincide with the longitudinal direction of the absorbent article, the fixing adhesive portion 21 and the fixing adhesive portion 22 intersect at the time of wearing. For this reason, the attachment to the underwear is stable, and it is difficult to slip even if used for a long time.

The number and size of the fixing adhesive portions are not particularly limited as long as the purpose of fixing can be achieved, but the number of fixing adhesive portions 21 provided on the back side of the absorbent main body 5 is preferably 1 to 10. It is a book, More preferably, it is 2-8.
The width of one of the fixing adhesive portions 21 provided on the back side of the absorbent main body 5 is preferably 2 to 40 mm, more preferably 5 to 20 mm.
The pitch of the fixing adhesive portions 21 provided on the back side of the absorbent main body 5 (the interval between the center lines of two adjacent fixing adhesive portions) is preferably 1 to 20 mm, more preferably 3 to 10 mm. is there.
The number of fixing adhesive portions 22 provided on the back side of the wing 6 is preferably 1 to 10, more preferably 2 to 7.
The width of one of the fixing adhesive portions 22 provided on the back side of the wing 6 is preferably 2 to 40 mm, and more preferably 5 to 20 mm.
The pitch of the fixing adhesive portions 22 provided on the back side of the wing 6 (the interval between the center lines of the two adjacent fixing adhesive portions) is preferably 1 to 20 mm, more preferably 3 to 10 mm.

For example, the absorbent article 1 has a shape as shown in FIG. 2, the dimension L _{1 in} the longitudinal direction Y of the absorbent main body 5 is 190 mm, the dimension W _{1 in} the width direction X of the absorbent main body 5 is 85 mm, and the wing 7 longitudinal direction Y of dimension _{L 2} is 80 mm, when the dimension _{W 2} in the width direction X of the wing 7 is 32.5 mm, the absorbent number of fixing adhesive portion provided on the back side of the main body 5 is five, the absorbent body The width of one of the fixing adhesive portions provided on the back surface side of 5 is 5 mm, the pitch of the fixing adhesive portions provided on the back surface side of the absorbent main body 5 is 10 mm, and the fixing adhesive portion provided on the back surface side of the absorbent main body 5 The length is 135 mm, the number of fixing adhesive portions provided on the back side of the wing 7 is 7, and the width of one fixing adhesive portion provided on the back side of the wing 7 is 5 mm, for fixing provided on the back side of the wing 7 Adhesive pitch is 10mm, on the back side of wing 7 The thing of the length of the adhesive part for fixing to provide 17.5 mm can be illustrated.

  The pair of wings 7, 7 may be connected together, or may be separated. That is, the pair of wings may be constituted by an integral nonwoven fabric (that is, one member) or may be constituted by separate nonwoven fabrics (that is, two members). FIG. 1 and FIG. 3 show an example in which a pair of wings are made of an integral nonwoven fabric. Preferably, the pair of wings is composed of an integral nonwoven fabric. When a pair of wings are configured as separate members, it is necessary to apply a seal or adhesive firmly to prevent the wings from coming off from the absorbent main body. By comprising, the seal and the adhesive can be reduced, leading to an improvement in wearing feeling.

  The top sheet 2 has a function of allowing liquid excretion from the body such as urine and menstrual blood to pass through the absorber 4 provided thereunder and absorbs the absorbent sheet 4 by sandwiching the absorber 4 between the top sheet 2 and the back sheet 3. This is for holding the body 4. The top sheet 2 is formed from a liquid-permeable nonwoven fabric. Although the kind of nonwoven fabric is not specifically limited, From a point with the good touch, an air through nonwoven fabric, a spun bond nonwoven fabric, and an SMS nonwoven fabric are preferable. As fibers constituting the nonwoven fabric, synthetic resin fibers such as polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), cellulose fibers such as rayon, etc. can be used, but polylactic acid, chitosan, polyalginic acid, etc. It is also possible to use natural products that can be biodegradable. In addition, a large number of liquid-permeable holes may be formed, and a silicone-based or fluorine-based water-repellent oil agent may be applied to make it difficult for body fluids to adhere to the outer surface.

  The back sheet 3 has a function of preventing liquids such as urine and menstrual blood absorbed by the absorber 4 from leaking out, and a material that can prevent such liquid from leaking out is used. used. Moreover, by using a material that does not allow liquid to pass through but is breathable, it is possible to reduce stuffiness during wearing and to reduce discomfort during wearing. Examples of such a material include a liquid-impermeable film mainly composed of polyethylene (PE), polypropylene (PP), etc., a breathable film, and a composite in which a liquid-impermeable film is laminated on one side of a nonwoven fabric such as spunbond. A sheet etc. are mentioned. Preferably, a hydrophobic nonwoven fabric, a water-impermeable plastic film, a laminate sheet of a nonwoven fabric and a water-impermeable plastic film, or the like can be used. Alternatively, an SMS nonwoven fabric in which a melt-blown nonwoven fabric having high water resistance is sandwiched between strong spunbond nonwoven fabrics may be used.

As the nonwoven fabric for forming the wings 7, the same nonwoven fabric as the topsheet can be used, and it is desirable to form a water-repellent nonwoven fabric alone from the viewpoint of good touch and breathability. Examples of the sheet having good touch include an air-through nonwoven fabric, a spunbond nonwoven fabric, and an SMS nonwoven fabric. Among these, an SMS nonwoven fabric is preferable.
The basis weight of the nonwoven fabric constituting the wing is preferably 15 to 40 g / m ² , and more preferably 20 to 35 g / m ² . If the basis weight is too small, even if the strength is ensured, it is too thin and makes the user feel uneasy. On the other hand, if the basis weight is too large, it becomes hard and the feeling of wearing becomes worse.

The absorbent body 4 has a function of absorbing and retaining liquids such as urine and menstrual blood, and is preferably bulky, hardly deformed, and has little chemical irritation. For example, the absorber which consists of a fluffy pulp or an airlaid nonwoven fabric and a superabsorbent polymer (SAP) can be illustrated. In place of the fluffy pulp, for example, artificial cellulose fibers such as chemical pulp, cellulose fiber, rayon, and acetate can be exemplified. Absorbent fibers such as pulp have a basis weight of 100 to 800 g / m ² , and the mass ratio of the superabsorbent polymer is preferably 30 to 65% with 100% of the absorbent fibers. The basis weight of the liquid-permeable material such as a tissue covering a mixture in which the absorbent fibers and the superabsorbent polymer are uniformly distributed is preferably 12 to 30 g / m ² . As an airlaid nonwoven fabric, for example, a nonwoven fabric in which pulp and synthetic fibers are thermally fused or fixed with a binder can be exemplified. The superabsorbent polymer has a three-dimensional network structure in which a water-soluble polymer is appropriately cross-linked, absorbs 30 to 60 times of water, but is essentially insoluble in water, For example, starch-based, acrylic acid-based, and amino acid-based particulate or fibrous polymers can be exemplified. Although the shape and structure of the absorbent body can be changed as necessary, the total amount of absorbent body absorbed needs to correspond to the design insertion amount as the absorbent article and the desired application. Further, the size and absorption capacity of the absorber are varied according to the application.

  The absorber 4 may be composed of two layers, an upper absorber layer and a lower absorber layer, and the upper absorber layer may be formed from a hydrophilic sheet and a superabsorbent polymer. A hydrophilic sheet | seat is a sheet | seat which has hydrophilicity which consists of a nonwoven fabric, a porous plastics sheet | seat, etc. In the case of a non-woven fabric, a porous plastic sheet, etc., hydrophilic treatment is performed as necessary. Moreover, as a nonwoven fabric, nonwoven fabrics, such as a spun lace, a spun bond, a thermal bond, a melt blown, a needle punch, an air through, are used, for example. 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. In the upper absorbent layer, the superabsorbent polymer is sprayed in a predetermined pattern on one side of the hydrophilic sheet, and another hydrophilic sheet is laminated so as to sandwich the superabsorbent polymer, and the superabsorbent polymer is not sprayed. It is joined at a location by a joining means (for example, heat sealing using a hot melt adhesive) to form a sheet. The superabsorbent polymer is preferably fixed to the hydrophilic sheet with an adhesive such as hot melt, but may be covered with the hydrophilic sheet without being fixed as a pulverized product. The hydrophilic sheet sandwiching the superabsorbent polymer may be joined by folding one hydrophilic sheet, or by joining the superabsorbent resin using the same or different hydrophilic sheets on the top and bottom. May be. As a form of the upper absorbent layer, the end and edge of the hydrophilic sheet may be formed by folding back toward the center. By folding, even if excessive body pressure is applied after absorption, the swollen superabsorbent polymer eliminates the risk of popping out from the upper absorbent layer, and the end is folded back, increasing the basis weight of the sheet material and compressing more. There is an effect of increasing recovery. The lower absorbent layer 5 can be made of a conventionally known absorbent material used as an absorbent body in an absorbent article such as an incontinence pad, a sanitary napkin, or a disposable diaper. A typical absorbent material includes a mixture of absorbent fibers and a superabsorbent polymer.

  The joint location between the wing 7 and the absorbent main body 5 is not particularly limited. For example, the wing 7 may be sandwiched and bonded between the top sheet 2 and the back sheet 3, or may be bonded to the back surface of the absorbent main body 5, that is, the exposed surface of the back sheet 3. Preferably, as shown in FIG. 2, the wing 7 is bonded to the top sheet side of the back sheet. Since the joint surface is on the skin surface side of the back sheet 3, the shorts surface side of the back sheet 3 can be maintained in a smooth state, so that the shorts fixing adhesive can be stably adhered to the back sheet 3, It is possible to prevent sticking residue on the shorts.

  The shape of the wing is not particularly limited, and examples thereof include a rectangle, a trapezoid, an inverted trapezoid, a semicircular shape, a semi-elliptical shape, and an Ω shape. Among these, a shape in which the base of the wing is constricted is preferable. Here, the root of the wing refers to a portion close to the side edge of the absorbent main body. That is, it is preferable that the dimension of the absorbent body longitudinal direction Y of the part near the side edge of an absorbent main body is smaller than the dimension of the absorbent main body longitudinal direction Y of a part far from the side edge of an absorbent main body. By adopting such a shape, when the wing is wound on the shorts, the wing can be wound with little distortion, and as a result, the winding portion cannot be bent, leading to a reduction in uncomfortable feeling.

FIG. 4 shows an example of a wing with a narrowed base. The shape shown in FIG. 4 is obtained by rounding the corner of a figure obtained by connecting two rectangles having different sizes with an isosceles trapezoid. The dimensions of each part of the shape varies depending on the overall dimensions of the absorbent article, _{L 2} is preferably 30 to 100 mm, more preferably from 40 to 90 mm.
L ₃ is preferably 40 to 90% of the _{L 2,} more preferably 50 to 80% of the _{L 2.}
W ₂ is preferably a 5～55Mm, more preferably 20 to 40 mm.
W ₃ being preferably 10% to 60% of _{W 2,} and more preferably 20 to 50% of the _{W 2.}
W ₄ is preferably 1 to 50% of W ₂ , and more preferably 5 to 30% of W ₂ .
W ₅ is preferably 30% to 80% of _{W 2,} and more preferably 40 to 70% of the _{W 2.}
The radius of curvature R1 is preferably _{1 to} 30 mm, and more preferably 2 to 15 mm.
The radius of curvature _{R 2} is preferably 1 to 30 mm, more preferably from 2 to 15 mm.
The radius of curvature _{R 3} is preferably 1 to 30 mm, more preferably from 2 to 15 mm.

For example, when the wing 7 has a shape as shown in FIG. 4 and the dimension L _{2 in} the longitudinal direction Y of the wing 7 is 80 mm and the dimension W _{2 in} the width direction X of the wing 7 is 32.5 mm, L ₃ is 55 mm. , W ₃ is 10 mm, W ₄ is 7 mm, W ₅ is 15.5 mm, R ₁ is 7.5 mm, R ₂ is 7.5 mm, and R ₃ is 5 mm.

  The shape of the absorbent main body 5 is not particularly limited as long as it is a shape that matches the shape of a human body and shorts, such as a rectangle, an ellipse, and a bowl. The total dimension of the outer shape is preferably 100 to 500 mm in the longitudinal direction, and more preferably 150 to 350 mm. Further, the width direction is preferably 30 to 200 mm, and preferably 40 to 180 mm.

  The absorbent article of the present invention can be used as an incontinence pad, a sanitary napkin, a panty liner, etc., and can be particularly suitably used as a light incontinence pad. The light incontinence pad is a product that is often used for a long time compared to sanitary napkins, so it needs to be configured for long-term use, and the absorbent article of the present invention is stable for a long time in shorts. Since it can be fixed, it is particularly preferably used for a light incontinence pad.

DESCRIPTION OF SYMBOLS 1 Absorbent article 2 Top sheet 3 Back sheet 4 Absorber 5 Absorbent body 6 Side edge part of absorbent body 7 Wing

Claims (7)

An absorbent main body comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between the two sheets, and a pair extending from both side edges of the absorbent main body An absorbent article having a wing of
A top sheet and a wing are comprised from a separate nonwoven fabric, the fiber orientation of a top sheet is a longitudinal direction, and the fiber orientation of a wing is the width direction, The absorbent article characterized by the above-mentioned.   A plurality of fixing adhesive portions are provided on the back surface side of the absorbent main body and the back surface side of each wing, and the extending direction of the plurality of fixing adhesive portions provided on the back surface side of the absorbent main body is the fiber of the surface sheet. The absorptivity according to claim 1, characterized in that the direction in which the plurality of fixing adhesive portions extending on the back side of the wing extend in the direction of orientation and the direction of fiber orientation in the wing. Goods.   The absorbent article according to claim 1 or 2, wherein the pair of wings is composed of an integral nonwoven fabric. The absorbent article according to claim 1, wherein the basis weight of the nonwoven fabric constituting the wings is 15 to 40 g / m ^2.   The absorbent article according to any one of claims 1 to 4, wherein the wing is bonded to the top sheet side of the back sheet.   The absorbent article according to any one of claims 1 to 5, wherein the base of the wing is constricted.   The absorbent article according to any one of claims 1 to 6, wherein the absorbent article is a light incontinence pad.

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