JP2015231578A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shape of a wing which can be stably fixed to shorts in an absorbent article with wings such as an incontinence pad and a sanitary napkin used by fixing to a crotch part of the shorts.SOLUTION: A longest part in a length in a wing longitudinal direction is located in a position separated from a side edge of an absorbent body. When a length in the wing longitudinal direction of a shortest part between the longest part in the wing longitudinal direction and the side edge of the absorbent body is defined as L, a part having a length in the wing longitudinal direction of 1.00 to 1.05 times Lexists between the longest part in the wing longitudinal direction and the side edge of the absorbent body at 10 to 90% of a lateral length Tof a longest part in a wing lateral direction. An outline of a part having the length in the wing longitudinal direction of 1.00 to 1.05 times the Lhas a straight line part perpendicular to a longitudinal direction of the absorbent body.

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.

  As absorbent articles such as light incontinence pads, sanitary napkins, panty liners, etc., a pair of wings were extended on both side edges of the absorbent main body, and both wings were folded and fixed to the outer surface side of the shorts. Absorbent articles with wings are known. For example, Patent Document 1 discloses a trapezoidal or rectangular wing. Patent Document 2 discloses a wing having a substantially inverted trapezoidal shape.

  While the wings are trapezoidal and other conventional forms, the absorbent article is manufactured with a flat design, but when in use, the article is aligned with the longitudinal centerline, lateral direction of the article to fit the wearer's body. There has been a problem of bending along one axis of a three-dimensional coordinate system formed by a center line and a line perpendicular to both. Therefore, in Patent Document 2, in order to solve this problem, as a means for reducing the strain, a wing having a shape almost opposite to that of the prior art (a shape that increases constantly as it advances from the proximal end to the distal end) is used. Although it has a relatively “big” appearance, it reduces distortion and stability compared to the wing design of the prior art, and does not significantly affect the protection of lateral leakage.

Japanese Examined Patent Publication No. 7-112481 JP-A-11-192262

  However, in the example of Patent Document 2, the length of the imaginary line parallel to the longitudinal center line of the article from the first lateral end of the wing to the second lateral end of the wing is from the proximal end. Increasing continuously towards the distal end (the first lateral end of the first wing and the second lateral end of the first wing are at least first from the proximal end of the first wing) When the wing of the absorbent article is detached from the shorts, the shape as described above is almost the same as the imaginary line parallel to the vertical center line of the main body. The force is concentrated on the base of the wing (the boundary between the wing and the absorbent body) (particularly the points at the ends of the boundary between the wing and the absorbent body). Deviate from the sex body.

  Also, when the absorbent article is attached to the shorts, the width of the crotch part differs between the shorts, so if the width of the shorts is larger than the width of the absorbent main body, if the fold origin is the root of the wing, it will fold to the shorts It will cause discomfort. In addition, there is a problem that it is difficult to fold when trying to fold at a position other than the base of the wing in accordance with the width of the shorts, and it is difficult to be folded back to the outer surface side of the shorts.

  This invention solves said subject and provides the shape of the wing which can fix an absorbent article to shorts stably.

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,
The wing has a wing longitudinal length in a longitudinal direction corresponding to the longitudinal direction of the absorbent main body, and a wing lateral length in a lateral direction perpendicular to the longitudinal direction of the absorbent main body,
The portion with the largest wing length in the longitudinal direction is located away from the side edge of the absorbent main body,
When the wing longitudinal length of the smallest portion wing longitudinal length between the wings longitudinal length the largest portion and the side edges of the absorbent body and L _min, of L _min from 1.00 to 1 .05 times the length of the wing in the longitudinal direction, the portion having the largest wing length in the longitudinal direction and the side edge of the absorbent body between the lateral length T of the portion having the largest wing lateral length 10% to 90% of _max ,
The longitudinal length of the wing at the side edge of the absorbent body is greater than or equal to L _min .

Preferably, the angle that appears inside the wing is 90 ° or less among the angles formed by the tangent line of the wing contour at the intersection of the wing contour and the side edge of the absorbent main body with the side edge of the absorbent main body.
Preferably, a portion having a wing longitudinal length of 0.90 to 1.0 times the longitudinal length L _max of the portion having the largest wing longitudinal length is 30 to 80% of T _max .
Preferably, L _min is 40 to 90% of L _max .
Preferably, the wing contour does not have an inflection point except at the intersection of the wing contour and the side edges of the absorbent body.
Preferably, the tangent line of the wing outline coincides with the side edge of the absorbent body at the intersection of the wing outline and the side edge of the absorbent body.
Preferably, the fixing adhesive is provided on the outer side in the wing vertical direction than the portion corresponding to L _min in the portion having a length in the wing vertical direction 0.9 to 1.0 times L _max .

Preferably, the pair of wings is formed of an integral member.
Preferably, the wing is joined to the top sheet side of the back sheet.
Preferably, the wing is joined to the back surface of the absorbent main body, and the joint between the wing and the back surface of the absorbent main body is located inside the side edge of the absorbent main body.
Preferably, the absorbent article is a light incontinence pad.

  The absorbent article of the present invention can be easily attached to shorts having different crotch widths, and is difficult to tear at the base of the wing.

FIG. 1 is a partially cutaway plan view of one embodiment of the absorbent article of the present invention. FIG. 2 is a schematic cross-sectional view showing a cross section taken along line AA of FIG. FIG. 3 is a bottom view of the absorbent article of FIG. FIG. 4 is a partially broken plan view of another embodiment of the absorbent article of the present invention. FIG. 5 is a plan view showing the shape of a wing of an absorbent article according to another embodiment of the present invention. FIG. 6 is a diagram illustrating an example of a fixed adhesive portion provided on the wing. FIG. 7 is a schematic cross-sectional view of another embodiment of the absorbent article of the present invention.

  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 broken plan view of one embodiment of the absorbent article of the present invention, FIG. 2 is a schematic cross-sectional view showing a cross section taken along line AA of FIG. 1, and FIG. 3 is a bottom view of the absorbent article. FIG. 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 wing 7 has a wing longitudinal length L in the longitudinal direction Y corresponding to the longitudinal direction of the absorbent main body 5 and a wing lateral length T in the lateral direction X orthogonal to the longitudinal direction of the absorbent main body. The portion having the largest wing length in the longitudinal direction is located away from the side edge 6 of the absorbent main body 5. That is, the shape of the wing 7 is narrowed (narrow) at the base of the wing 7 (portion close to the side edge of the absorbent main body).
In order to stably fix the absorbent article to the shorts, it is better to have a large wing that is folded back and fixed to the outer surface side of the shorts. Cannot be firmly fixed without matching the curve between the crotch of the shorts. Therefore, it is preferable that the portion that wraps around the outside of the shorts and is fixed to the outside of the shorts via the adhesive is wide, but the portion that is bent is preferably narrow. This requirement is particularly noticeable in light incontinence pads that are often used for a longer time than sanitary napkins.

Here, the length of the wing in the vertical direction of the portion having the smallest length in the vertical direction of the wing between the portion having the largest length in the vertical direction of the wing and the side edge of the absorbent main body is represented by L _min . In the present invention, the portion having the wing longitudinal length of 1.00 to 1.05 times L _min is between the portion having the largest wing longitudinal length and the side edge of the absorbent main body. 10 to 90% of the lateral length T _max of the portion having the largest direction length exists. In other words, “a portion having a length in the wing longitudinal direction of 1.00 to 1.05 times L _min ” refers to a portion of L _{min and} a portion within 5% of the deviation from L _min . P _min . That is, in the present invention, P _min exists not in one place but in a range of 10 to 90% of T _max .
When the wing is fixed around the outside of the shorts, the wing tends to bend at the P _min portion. Therefore, when the length of the wing is increased monotonously from the base 8 of the wing (when the portion of L _min is only one of the base of the wing), the width of the crotch portion of the shorts is that of the absorbent main body. If it is wider than the width, the wing will be folded at a place other than L _min , or the groin part of the shorts will be narrowed and folded at the L _min part. In either case, stable fixation is difficult. In the present invention, since P _min exists over a certain range rather than in one place, even if the width of the crotch portion of the shorts is slightly wider than the width of the absorbent main body 5, it can be folded at P _min. , Stable fixation becomes possible. That is, since the fold starting point can be made in addition to the side edges of the absorbent main body, the wing folding position can be easily adjusted to the crotch width of the shorts, and the uncomfortable feeling such as the shorts being folded during use can be reduced.
The length t _min in the transverse direction X of the P _min is 10 to 90% of the T _max, and more preferably 30 to 60%. When the length t _min in the transverse direction X of the P _min is too small, flexibility is reduced to variations in the width of the crotch portion of the shorts, the ratio of the inverse to t _min is too large, crowded around the outside of the shorts shorts The area of the portion fixed to is reduced. The length t _min in the transverse direction X of the P _min, depending on the overall dimensions of the absorbent article, specifically, preferably 5 to 20 mm.
Further, the longitudinal length of the wing at the side edge of the absorbent main body is greater than or equal to L _min . When the longitudinal length of the wing at the side edge of the absorbent main body is smaller than L _min , the force concentrates on the ends 8 of the base 8 of the wing 7 (intersection of the wing outline 9 and the side edge 6 of the absorbent main body) 11. And it is easy to break from there. By making the longitudinal length of the wing at the side edge of the absorbent main body greater than or equal to L _min , the wing 7 can be made difficult to tear off from the absorbent main body 5.

  Of the angles formed by the tangent line 12 of the wing outline 9 at the intersection 11 of the wing outline 9 and the side edge 6 of the absorbent body with the side edge 6 of the absorbent body, the angle θ appearing inside the wing is 90 ° or less. Preferably there is. In the case of an inverted isosceles trapezoid whose wing longitudinal length monotonically increases from the base 8 of the wing, the angle θ is greater than 90 °. In this case, the force concentrates on both ends (intersections of the wing outline 9 and the side edge 6 of the absorbent main body) 11 of the base 8 of the wing 7, and it is easy to break from that point. By setting the angle θ to 90 ° or less, the wing 7 can be made difficult to tear off from the absorbent main body 5. Further, when the pair of wings are pulled to the left and right at the time of mounting, the force can be dispersed instead of one point, so that it is not necessary to use a material with a high basis weight or to perform a laminating process only for securing the strength. As a result, it is possible to select a material with a low basis weight. By selecting a material with a low basis weight, it is easy to fold and a wing with improved wearing feeling can be realized.

It is preferable that a portion P _max having a wing longitudinal length of 0.9 to 1.0 times the longitudinal length L _max of the portion having the largest wing longitudinal length is 30 to 80% of T _max . That is, the length t _max of the lateral direction X of the P _max is preferably 30 to 80% of the T _max. The larger the area of the portion that goes around the outside of the shorts and is fixed to the shorts is preferable because stable fixation can be obtained. t _max is more preferably 50 to 70% of T _max . If t _max is too small, the area of the portion that goes around the outside of the shorts and is fixed to the shorts decreases. Conversely, if the ratio of t _max is too large, t _min becomes small and the width of the crotch portion of the shorts is reduced. Flexibility to change is reduced. Specifically, t _max is preferably 10 to 20 mm, although it depends on the overall size of the absorbent article.

L _min is preferably 40 to 90% of L _max , and more preferably 50 to 80%. If L _min is too small, the strength of the L _min portion will be insufficient, and conversely if L _min is too large, it will not fit the curve of the crotch portion of the shorts. L _min depends on the overall size of the absorbent article, but is preferably 30 to 70 mm, more preferably 40 to 60 mm.

  The wing outline preferably has no refraction point except for the intersection 11 between the wing outline 9 and the side edge 6 of the absorbent body. Here, the refraction point refers to a point where the contour changes direction discontinuously. That is, the corners of the wing outline are rounded and have no vertices. In the case where there is an angular part, if the part that is angular with the user's skin hits during use, it causes discomfort. Therefore, by making the corners round, it is possible to make it difficult to have discomfort. In addition, it is preferable that there is no apex (refractive point) having an inner angle larger than 180 ° because it tends to break from that point. Since the force when pulling the pair of wings to the left and right at the time of mounting can be dispersed, it is difficult to break.

  The wing 7 may be formed by extending the top sheet 2 and the back sheet 3 used in the absorbent body 5 in the width direction, or may be formed from a member separate from the members constituting the absorbent body 5. Or you may form by the member integral with the member which comprises the absorptive main body 5. FIG. For example, a shape including both the back sheet 3 and the wing 7 may be cut out from one sheet to form a single member in which the back sheet 3 and the wing 7 are integrally connected. Further, a shape including both the top sheet 2 and the wing 7 may be cut out from one sheet to form a single member in which the top sheet 2 and the wing 7 are integrally connected. A separate side sheet (not shown) may be provided on both sides of the top sheet 2, and the side sheet and the back sheet 3 may be extended in the width direction and integrated to form the wing 7. When the wing 7 is formed from a member separate from the absorbent main body 5, it is preferable to combine the members so that the orientations of the members intersect. When the wing 7 is made of a nonwoven fabric, the strength of the wing lateral direction can be increased by attaching the fiber orientation of the nonwoven fabric so as to be orthogonal to the longitudinal direction of the absorbent body. Can do. FIG. 1 shows an absorbent article produced by forming the absorbent main body 5 and the wing 7 from separate members and bonding them together. FIG. 4 shows an absorbent article according to an embodiment in which the wing 7 is formed from a sheet in which the top sheet 2 and the back sheet 3 extend in the lateral direction and are integrated.

Here, the fiber orientation is the fiber orientation when the surface of the nonwoven fabric is viewed. Regarding the nonwoven fabric, “the fiber orientation is 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. This refers to those having 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.
It is preferable that the wing 7 is formed from a member separate from the absorbent main body 5, 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.
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.
When 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. However, the fiber orientation of the nonwoven fabric forming the absorbent main body and the nonwoven fabric forming the wing is orthogonal to each other. When it does, the point which each entangles increases more than the case where the fiber orientation is carried out in parallel, and adhesive strength becomes large. 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.

  When the top sheet 2 and the wing 7 and / or the back sheet 3 and the wing 7 are integrated, the wing 7 absorbs the side edge 6 of the absorbent main body at the portion where the wing 7 is connected to the absorbent main body 5. A line connecting the upper edge 6a of the absorbent main body that is not connected to the absorbent main body 5 and the lower edge 6b of the absorbent main body is regarded as the side edge 6 of the absorbent main body. The same applies to the base 8 of the wing.

  The tangent line 12 of the wing outline may coincide with the side edge 6 of the absorbent body at the intersection 11 of the wing outline 9 and the side edge 6 of the absorbent body. In particular, when the wing 7 is constituted by a member integrated with the member (the front sheet 2 or the back sheet 3) constituting the absorbent main body 5, as shown in FIG. 4, the wing outline 9 and the absorbent main body It is preferable that the tangent line 12 of the wing outline coincides with the side edge 6 of the absorbent main body at the intersection 11 with the side edge 6. In this case, both ends 11 of the base 8 of the wing have no refraction point and are rounded. By doing in this way, force does not concentrate on one point and it can make it hard to tear a wing from an absorptive main part.

FIG. 5 is a plan view showing the shape of a wing of an absorbent article according to another embodiment of the present invention. The shape shown in FIG. 5 is obtained by rounding the corners 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 1} is preferably 30 to 100 mm, more preferably from 40 to 90 mm.
L ₂ is preferably 40 to 90% of L ₁ , and more preferably 50 to 80% of L ₁ .
T ₁ is preferably 5 to 55 mm, more preferably 20 to 40 mm.
T ₂ is preferably 10 to 60% of T ₁ , and more preferably 20 to 50% of T ₁ .
T ₃ is preferably ₁ to 50% of T ₁ , and more preferably 5 to 30% of T ₁ .
T ₄ is preferably 30% to 80% of _{T 1,} and more preferably 40 to 70% of the _{T 1.}
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.

As a specific example of the shape of the wing of the absorbent article of the present invention, the shape is as shown in FIG. 5, where L ₁ is 80 mm, L ₂ is 55 mm, T ₁ is 32.5 mm, T ₂ is 10 mm, T ₃ 7 mm, T ₄ is 15.5 mm, R ₁ is 7.5 mm, R ₂ is 7.5 mm, and R ₃ is 5 mm.

FIG. 3 is a bottom view of the absorbent article of FIG.
On the back surface of the absorbent article 1, it is preferable to provide a fixing adhesive portion 21 to which an adhesive for fixing to the shorts is applied. It is preferable to provide fixing adhesive portions 21 on both the back surface of the absorbent main body 5 and the back surface of the wing 7. There may be one fixing adhesive portion 21 provided on the back surface of the absorbent main body 5 or a plurality of fixing adhesive portions 21 may be provided. The fixing adhesive portion 21 provided on the back surface of the wing 7 may be one as shown in FIG. 3, or may be divided into a plurality as shown in FIG. In any case, the fixing adhesive portion 21 is provided on the outer side in the longitudinal direction Y outside the portion corresponding to L _min in the portion having the wing longitudinal length of 0.9 to 1.0 times L _max. Preferably it is. By providing the fixing adhesive portion 21 on the outer side of the portion corresponding to L _min , the wing can be fixed to the shorts with a wide bonding area, so that it can be more stably fixed to the shorts. Moreover, since the wing can be fixed to the shorts with a wide bonding area, the basis weight of the pressure-sensitive adhesive can be reduced. Further, since it is possible to prevent the outer side of the portion corresponding to L _min of the wing from folding back, it is possible to prevent the portion folded during use from hitting the skin and causing discomfort.

  The pair of wings 7 and 7 may be connected together or may be separated from each other, but the pair of wings are connected together, that is, an integrated member. It is preferable that it is comprised from these. By comprising a pair of wings from an integral member, the left and right wings can be made difficult to shift with respect to the absorbent body 5 in the manufacturing process. In addition, if the base is joined to the main body only at the narrowed portion, the joint area is reduced, but since the joint can be performed across the width direction, the wing is not easily detached from the main body even if one side is pulled. FIG. 1 and FIG. 2 show an example in which a pair of wings 7 are connected together. FIG. 7 is a schematic cross-sectional view of another embodiment of the absorbent article of the present invention, and shows an example in which a pair of wings 7 and 7 are not connected.

  When the wing 7 is a separate member from the absorbent main body 5, the joint location of the wing 7 with 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. FIG. 2 is an example in which the wing 7 is sandwiched and joined between the top sheet 2 and the back sheet 3. FIG. 2 is also an example in which the wing 7 is bonded to the top sheet side of the back sheet 3. When the wing 7 is joined to the top sheet side of the back sheet, the wing can be easily folded to the back side. Since the wing is not exposed on the back surface, the back surface becomes smooth and the fixing adhesive portion can be stably disposed on the back sheet, so that the fixing adhesive is difficult to move to the underwear.

  FIG. 7 shows an example in which the wing 7 is bonded to the back surface of the absorbent main body 5, that is, the exposed surface of the back sheet 3. When joining the wing 7 to the back surface of the absorbent main body 5, the joint between the wing 7 and the back surface of the absorbent main body 5 need not be the entire contact surface between the wing 7 and the absorbent main body 5, as shown in FIG. Thus, the junction part 31 can also be provided in the place inside the side edge 6 of the absorptive main body. When the joint 31 between the wing 7 and the back surface of the absorbent main body 5 is located inside the side edge 6 of the absorbent main body, the crotch width of the shorts is smaller than the width of the absorbent main body 5 Moreover, the absorbent article 1 can be fixed according to the crotch width of the shorts.

  The shape of the absorptive main body 5 is not particularly limited as long as it is a shape that matches the shape of a female body and shorts, such as a rectangle, an ellipse, and a saddle. The total dimension of the outer shape is preferably 100 to 500 mm in the longitudinal direction, and more preferably 150 to 350 mm. Moreover, 30-200 mm is preferable and, as for a transversal direction, it is preferable that it is 40-180 mm.

  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 surface sheet 2 is wholly or partially liquid permeable, and the liquid permeable region has a resin film in which a large number of liquid permeable holes are formed, a net-like sheet having a large number of meshes, a liquid permeable nonwoven fabric, or It is made of woven fabric. As the resin film and the net-like sheet, those formed of polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET) or the like can be used. Moreover, as a nonwoven fabric, the spunlace nonwoven fabric formed from cellulose fibers, such as rayon, a synthetic resin fiber, etc., the air through nonwoven fabric formed from the said synthetic resin fiber, etc. can be used. Moreover, as a raw material, natural products capable of biodegradability such as polylactic acid, chitosan, polyalginic acid and the like can be used. 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.

Basis weight of the surface sheet 2 is preferably ^{15~100g / m 2, 20~50g / m} 2 is more preferable. If the basis weight is 15 g / m ² or less, the surface strength is not sufficiently obtained, and there is a risk of breaking during use. Moreover, when it exceeds 100 g / m < ² >, excessive wrinkle will express and a discomfort will be produced during use. Furthermore, in the case of using for a long time, if it exceeds 50 g / m ² , the liquid is held by the top sheet 2 and is kept in a solid state, which makes it uncomfortable. Further, the density is not particularly limited as long as it is 0.12 g / cm ³ or less and liquid permeable. When the density is higher than this, it is difficult to smoothly pass between the fibers of the top sheet 2.

  When the liquid permeable region constituting all or part of the top sheet 2 is an apertured film such as a film in which a large number of liquid permeable apertures are formed, the aperture diameter is 0.05 mm or more and 3 mm or less. Within the range, the pitch is preferably in the range of 0.2 mm to 10 mm, and the aperture area ratio is preferably in the range of 3% to 30%.

  In the absorbent article 1 of the present invention, a second liquid-permeable sheet may be further provided between the top sheet 2 and the absorbent body 4. The second liquid permeable sheet is made of a material (for example, non-woven fabric) similar to the top sheet 2 and has a slightly higher density than the top sheet 2 to improve the liquid repellency, It can be provided to make it difficult to return.

  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 a material for forming the wing 7, those described above as the material for forming the back sheet 3 or the top sheet 2 can be used.

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 body pressure is excessively applied after absorption, the swollen superabsorbent polymer eliminates the risk of jumping out from the upper absorbent layer, and the edge 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 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 Absorbent body side edge 7 Wing 8 Wing root 9 Wing outline 11 Intersection of wing outline and absorbent body side edge 12 Intersection 11 Tangent line of wing outline in 21 Adhesive part for fixing 31 Joint part

Claims (11)

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
The wing has a wing longitudinal length in a longitudinal direction corresponding to the longitudinal direction of the absorbent main body, and a wing lateral length in a lateral direction perpendicular to the longitudinal direction of the absorbent main body,
The portion with the largest wing length in the longitudinal direction is located away from the side edge of the absorbent main body,
When the wing longitudinal length of the smallest portion wing longitudinal length between the wings longitudinal length the largest portion and the side edges of the absorbent body and L _min, of L _min from 1.00 to 1 .05 times the length of the wing in the longitudinal direction, the portion having the largest wing length in the longitudinal direction and the side edge of the absorbent body between the lateral length T of the portion having the largest wing lateral length exists 30-60% of _max ,
An absorbent article characterized in that the contour of a portion having a length in the wing longitudinal direction of 1.00 to 1.05 times L _min has a linear portion perpendicular to the longitudinal direction of the absorbent main body.   The angle which appears in the inside of a wing among the angles which the tangent of the wing outline in the intersection of the wing outline and the side edge of an absorptive main body and the side edge of an absorptive main body is 90 degrees or less is characterized by the above-mentioned. Absorbent article as described in 1. A portion having a wing longitudinal length of 0.9 to 1.0 times the longitudinal length L _max of the portion having the largest wing longitudinal length is 30 to 80% of T _max. The absorbent article according to claim 1 or 2. The absorbent article according to claim 1, wherein L _min is 40 to 90% of L _max .   The absorbent article according to any one of claims 1 to 4, wherein the outline of the wing does not have a refraction point except for the intersection of the outline of the wing and the side edge of the absorbent main body.   The absorptivity according to any one of claims 1 to 5, wherein a tangent line of the wing outline coincides with a side edge of the absorbent main body at an intersection between the wing outline and the side edge of the absorbent main body. Goods. In a portion having a wing longitudinal length of 0.9 to 1.0 times L _max , the wing longitudinal length is the smallest between the portion having the largest wing longitudinal length and the side edge of the absorbent main body. The absorbent article according to any one of claims 1 to 6, wherein a fixing adhesive portion is provided on the outer side in the longitudinal direction from a portion corresponding to the portion to be formed.   A pair of wing is comprised from the integral member, The absorbent article of any one of Claims 1-7 characterized by the above-mentioned.   The absorbent article according to any one of claims 1 to 8, wherein the wing is bonded to the top sheet side of the back sheet.   The wing is joined to the back surface of the absorbent main body, and the joint between the wing and the back surface of the absorbent main body is located inside the side edge of the absorbent main body. The absorbent article of Claim 1.   The absorbent article according to any one of claims 1 to 10, wherein the absorbent article is a light incontinence pad.

Images