JP2011125424A - Sanitary napkin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sanitary napkin which adjusts and adequately suppresses movements in the width direction of an absorber part of the sanitary napkin having the structure depending on places, shows excellent contact with a body, and hardly causes side leakage while solving a problem particular to a sanitary napkin equipped with a main part and an absorbent part on a skin side which is partially separated from the main part and is superposed in a manner to be independently deformed. <P>SOLUTION: In the sanitary napkin 10, the main part 1 and the absorber part 2 are separated without being joined in a central region in the longitudinal direction of the sanitary napkin 10 and are joined in the front end region or the rear end region of the longitudinal direction of the sanitary napkin 10. An elastic member 19 having a length which is the same as or shorter than a side part is provided on the side part along the longitudinal direction of the absorber part 2 in a manner to extend in the longitudinal direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sanitary napkin.

  Various sanitary napkins and the like have been devised for the purpose and convenience of wearing, as well as improved absorption performance, and a wide variety of sanitary napkins have been developed. As one of them, a liquid-retaining absorbent body that is separate from this is applied to a napkin body having the shape of a normal sanitary napkin, and the body is placed on the skin side. There are things that are weighted together. In this napkin, the skin-side absorbent body part is fixed to the main body part while being separable in the central part in the longitudinal direction of the napkin, thereby making the absorption independent of the movement of the wearer and the movement of the underwear. The body part fits the body and can improve the adhesion with the crotch.

  For example, Patent Document 1 has an upper and lower two-layer absorber, and the upper-layer absorber portion is connected to the lower-layer absorber on the main body portion side through an elastic member that can expand and contract in the longitudinal direction at both ends in the longitudinal direction. Have been disclosed. As a result, the upper-layer absorbent body portion on the skin side is positioned so as to be spaced upward from the lower-layer absorbent body under no stress, and can follow the movement of the body by the action of the elastic member.

  Patent Document 2 discloses a body having a main body portion of a napkin and a skin-side absorbent body portion which is superposed on the main body portion and whose both ends in the longitudinal direction are fixed to the main body portion. In this napkin, the skin-side absorber and the main body are arranged with their longitudinal directions aligned. In this sanitary napkin, the length of the absorbent part on the skin side between the joints is longer than that of the main body part. It is said that will increase.

  Patent Document 3 has a structure similar to that of Patent Document 2, except that the absorber and the main body are joined at one end in the longitudinal direction, and the other is joined at the other end. What can be used without being disclosed is disclosed. In this napkin, the non-joint end of the absorbent body part is attached to the undergarment and worn, thereby improving the adhesion to the skin.

JP-A-11-104168 JP 2008-246092 A JP 2008-246093 A

  The sanitary napkin disclosed in Patent Literatures 1 to 3 acts so that the skin-side absorbent body part positively contacts the wearer's body, and has a good fit independent of the movement of the body and underwear. can get. In particular, when worn in combination with loose shorts that do not have strong supportability such as being in close contact with the body, the skin-side absorbent body is less likely to be displaced from the excretion point even with the movement of the underwear, and there is less concern about leakage. However, in Patent Documents 1 to 3, it is difficult to make use of the absorbent body on the underwear side, and it is easy to apply to a small amount of absorption. In particular, in those proposed in Patent Documents 2 and 3, depending on the wearing state and place, It is conceivable that the skin-side absorbent body portion is shifted or twisted because it can be independently deformed or moved.

  In view of solving the problems peculiar to a sanitary napkin comprising an absorbent body portion positioned on the skin side that is polymerized in a state in which the main body portion is partially separated and can be independently deformed, as described above. Provided is a sanitary napkin that moderately suppresses movement and change in the width direction of the absorbent body portion of the sanitary napkin having the structure, has high adhesion to the body, and hardly causes side leakage. Further, the present invention provides a sanitary napkin that is less likely to leak by enhancing the use of an absorber on the underwear side as well as the body side.

  The above-described problem is a sanitary napkin in which a main body part containing a first absorbent layer and a skin-side absorbent part containing a second absorbent layer are both aligned in the longitudinal direction. The main body part and the absorbent body part can be separated without being joined in the central region in the longitudinal direction of the sanitary napkin and can be joined in the front end region or the rear end region in the longitudinal direction of the sanitary napkin. The problem has been solved by a sanitary napkin in which an elastic member having a length equal to or shorter than the length of the absorbent body portion is provided extending in the longitudinal direction on the side portion along the longitudinal direction of the absorbent body portion.

  The sanitary napkin of the present invention maintains an advantage regarding wearing performance due to its unique structure in a sanitary napkin comprising a main body part and an absorbent part that is partially spaced apart and polymerized in an independently deformable state. Thus, there is an effect of moderately suppressing the movement and deformation of the absorbent body portion located on the skin side in the width direction, having high adhesion to the body, and hardly causing side leakage. Moreover, the sanitary napkin of the present invention can enhance the utilization of the absorber on the underwear side as well as the body side in addition to the above effects.

The sanitary napkin of the present invention is a perspective view schematically showing one embodiment (Embodiment 1) with a part cut away. It is the side view which showed typically the relationship between the 1st absorption layer and 2nd absorption layer of the sanitary napkin shown in FIG. 1 as a wearing state (natural shape) (a) and an expansion | extension state (b). It is an expanded sectional view of the III-III line cross section of the sanitary napkin shown in FIG. It is the top view which showed typically the arrangement | positioning shape of the concave groove | channel as a modification of the sanitary napkin shown in FIG. 1 by the relationship between an absorber part and a main-body part. It is an expanded sectional view which showed the cross section corresponded to the AA line cross section of FIG. 1 about another embodiment (embodiment 2) of the sanitary napkin of this invention. It is the side view which showed typically the relationship between the 1st absorption layer and the 2nd absorption layer as a wearing state (natural shape) about another embodiment (embodiment 3) of the sanitary napkin of the present invention.

Hereinafter, a preferred embodiment (Embodiment 1) of a sanitary napkin of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view schematically showing an embodiment of the sanitary napkin of the present invention with a part cut away.
The napkin 10 according to this embodiment includes a liquid retaining main body 1 and a liquid retaining absorbent body 2. With respect to the main body 1, the absorbent body 2 having a narrower width than the first absorbent layer 12 inside the main body is disposed on the skin surface side. The sanitary napkin 10 is a substantially vertically long absorbent article, and the main body 1 and the absorbent body 2 are superposed and arranged with their longitudinal directions aligned.

  More specifically, the sanitary napkin 10 of the present embodiment includes a liquid-permeable surface sheet 11 that forms a skin contact surface as the main body 1 and a liquid-impermeable or water-repellent surface that forms a non-skin contact surface. And a liquid-retaining first absorbent layer 12 interposed between the two sheets 11 and 13. Further, side sheets 14 are disposed on the skin surface sides on both sides in the width direction of the main body 1, and a portion from the center in the longitudinal direction from the center in the width direction is not joined to the main body 1 and the free end Wt. It is said that. Accordingly, this portion can stand on the body side in a worn state, and forms a leak-proof wall W formed by the elastic member 18 (see FIG. 3) and the side seat 14. Further, as described above, the skin contact surface side of the main body 1 is a portion where the absorbent body 2 and the main body 1 are overlapped at the front joint portion 31 (the portion from the auxiliary line A toward the rear end D). A region defined by the auxiliary line AD is referred to as “front end region AD”, and the vicinity of the auxiliary line D is further referred to as “front portion”) and the rear joint portion 32 (from the auxiliary line C). It is a part where the absorber part 2 and the main body part 1 are overlapped at a part toward the rear end F. An area defined by the auxiliary line CF is referred to as a “rear end part area C-F”. The absorber part 1 partially joined to the main body part 1 by the vicinity of the line F is referred to as a “rear part”. In this way, the sanitary napkin 10 has a substantially vertically long shape, and no joint is formed in the central region A-C of the napkin including the excretion site Q, and the main body 1 and the absorber 2 Are spaced apart and can be deformed independently.

  The absorbent body portion 2 includes an internal second absorbent layer 22, a liquid-permeable interior sheet 24 (24 a, 24 b) that covers the second absorbent layer 22, a liquid-permeable covering sheet 21 that covers the outside, and the longitudinal direction It is comprised by the elongate elastic member 19 extended, and this member itself has absorption retainability, such as a liquid. Here, the elastic member 19 is sandwiched and fixed between the both sides of the upper interior sheet 24a and the lower interior sheet 24b on both sides of the second absorbent layer 22 in the width direction. At this time, the elastic member 19 may be fixed in a stretched state or may be fixed in a natural shape without being stretched. In particular, in the present embodiment, the second absorbent layer 22 is capable of following the body. From the viewpoint of high resilience, it is preferable that the elastic member 19 is fixed in an extended state to the extent that wrinkles and the like are not generated in the second absorbent layer 22 due to the contraction of the elastic member 19. The method for fixing the elastic member 19 is not particularly limited, but methods and materials usually used for bonding this type of member can be applied. In the present embodiment, the elastic member 19 is continuously arranged extending in the longitudinal direction of the article in the central region A-C where the absorbent body 2 is not joined to the main body 1. The function and action provided by the elastic member 19 will be described in detail later. In addition, about the absorber part 2, you may make it arrange | position this at the main-body-part side using the back sheet (not shown) for liquid-impermeable absorbers as the modification.

  In the present invention, unless otherwise specified, the side in contact with the human body is referred to as the skin surface side or the skin contact surface side or the surface side, and the side in contact with the underwear is the non-skin surface side or the non-skin contact surface side or the back surface side. That's it. In addition, the direction positioned on the front side of the human body when worn is referred to as the front, and its end is referred to as the front end, and the direction positioned on the rear is referred to as the rear, and the end is referred to as the rear end. Moreover, the normal line direction of the surface or back surface of an absorbent article (sanitary napkin) is called thickness or thickness direction, and the amount is called thickness. Furthermore, a direction having a relatively long length in a plan view of the absorbent article (sanitary napkin) is referred to as a longitudinal direction, and a direction orthogonal to the longitudinal direction is referred to as a width direction. The longitudinal direction typically coincides with the front-rear direction of the human body when worn.

  The top sheet 11 and the back sheet 13 have a size larger than that of the first absorbent layer 12 inside the main body, and extend from the longitudinal front and rear ends of the first absorbent layer 12 at the ends of the extended parts. The end seal portions 33 are formed by being joined together by heat sealing or the like. The end seal 33 is formed so as to partially include a joint portion between the main body portion 1 and the absorber portion 2, and also serves to join the both. The surface sheet 11 covers substantially the entire region of the first absorbent layer 12 on the skin contact surface side, and is connected to the side sheet at both side portions along the longitudinal direction of the first absorbent layer 12 to provide the first absorbent layer. Twelve non-skin contact surfaces reach the left and right sides. The back sheet 13 extends outward from both side edges along the longitudinal direction of the first absorbent layer 12 to form a flap portion m together with the side sheet. Further, the napkin 10 is fixed to clothes such as underwear at a predetermined position located below the first absorbent layer 12 on the non-skin contact surface side of the back sheet 13 or the non-skin contact surface of the side wing n. A non-adhesive part is provided. These pressure-sensitive adhesive portions are provided by applying a hot melt pressure-sensitive adhesive to a predetermined location, and are covered with a release sheet (not shown) made of a film, a nonwoven fabric, paper, or the like before the napkin 10 is used.

In this embodiment, the 2nd absorption layer 22 is made narrower than the 1st absorption layer 12, and it is made easy to fit the undulation of a body, and it is preferable that the width is 60-80 mm. However, the width of the second absorbent layer may be appropriately set in the range of 45 to 70 mm in consideration of the usage pattern and the like, or may be set in the range of 20 to 50 mm more narrowly. On the other hand, the first absorption layer 12 inside the main body 1 has a thickness h ₂₂ (see FIG. 2) thinner than the second absorption layer 22 inside the skin-side absorber 1 at the center in the longitudinal direction of the napkin, and the first absorption. preferably the thickness _{h 12} of layer 12 is 5mm or less, and more preferably less than 3mm. Although the difference in the thickness in the center of the longitudinal direction of both absorption layers is not specifically limited, It is preferable that it is 1-5 mm, and it is more preferable that it is 2-4 mm. The absorbent layer preferably has flexibility and flexibility to easily follow movement during use. The absorption retention amount of the first absorption layer and the second absorption layer is not particularly limited. For example, the first absorption layer 12 of the main body portion has a lower total absorption amount than the second absorption layer 22 of the absorber portion. Or vice versa.

  In this embodiment, the joint parts 31 and 32 which join the main body part 1 and the absorber part 2 are formed by the adhesive applied to the boundary of each member. Further, as a modification, by subjecting the main body 1 and the absorber 2 to a groove processing having a concave cross section by heat sealing or the like (see FIG. 4), the end seal portion 33 can be formed and both members can be firmly fixed. . When the bonding part is formed with the adhesive on the surface sheet side of the main body part, it can be formed by applying the adhesive to the bonding position, and in the case of grooving, an annular shape surrounding the excretion part is preferable. The joining portion may be formed by the width direction component, and the concave groove may be provided so that the longitudinal direction component is formed only in the main body portion. In addition, a portion with and without a joint portion can be formed by not performing groove processing around the excretion region. In addition, a more stable joint can be formed by groove processing in the adhesive application region.

  In the napkin 10 of the present embodiment, the absorbent body 2 is joined to the main body 1 in the rear end region CF as well as in the front end region AD as well as in the front end region AD as described above. , 32. This is preferable because any one of them is bonded to the one which is easily attached. Moreover, as shown in FIG. 2, when the main body 1 is bent and deformed when the napkin 10 is attached, a force is applied to the absorber 2 joined in the forward and backward directions to bend in reverse. When only either the front part or the rear part is joined, such a force does not act. In FIG. 2, the movement of the main body 1 and the absorbent body 2 is assumed to be a joint of the first absorption layer 11 and the second absorption layer 12 in the interior thereof, so as not to complicate the explanation. It is shown. As shown here, if it is considered that there is no skin surface of the wearer, the absorbent body portion 2 is separated and deformed independently of the main body portion 1 so as to be greatly raised on the skin surface side. Abut. That is, FIG. 2 can be understood as a model diagram showing the action of force as described above. In the present embodiment, the force that presses against the skin side is generated in the absorbent body portion 2 in this manner, so that the undulation of the skin at the excretion point is moderately strong and a liquid leakage prevention property and a high fit can be obtained. .

In the sanitary napkin having such a specific structure, in the present embodiment, the elastic member 19 described above extends and is disposed in the longitudinal direction in the absorbent body portion 2, so that this portion moves excessively when worn, It is difficult to make inadvertent deformation and is preferable. In particular, it conforms to the undulations of the skin of the wearer's excretion point, and its shape is maintained regardless of the wearer's movement and misalignment of the underwear. Can be prevented.
In particular, in the present embodiment, in the absorbent body portion 2 having a substantially rectangular cross section, since the long elastic members extend in the longitudinal direction on both sides in the width direction, the absorbent body portion is C-shaped in a plan view. Therefore, it is preferable that a deformation such as a curve is difficult to occur. In addition, an elastic member having elastic elasticity, not a rigid member, stabilizes the overall shape of the absorber portion like the spine while maintaining an appropriate degree of freedom of movement, and is also a delicate skin surface of the wearer. Can be worn comfortably for a long time without causing a strong sense of discomfort or discomfort.

  Further, the operation of the elastic member in the present embodiment will be described in detail with reference to FIG. 3 showing the cross-sectional shape of the cross section taken along the line III-III in FIG. 1 (however, in FIG. In FIG. 3, the absorber portion and the main body portion are shown in contact with each other. In the present embodiment, in the front end region and the rear end region of the sanitary napkin, joint regions 31 and 32 are formed in which the main body 1 and the absorbent body 2 are joined by a hot-melt adhesive material. The elastic member 19 is not disposed at that portion. Thereby, the shape of the joining area | region is maintained as flat so that it may contact | abut to skin favorably. On the other hand, the leak-proof wall W formed in the article central region rises toward the skin side from the main body side outside the both sides of the absorbent body portion 2, and in the present embodiment, the closer to the front end region, the closer the absorbent body portion is. The distance between the side end 2s and the standing base portion Wk of the leak-proof wall is narrowed (this relationship is not emphasized so much in FIG. 1). Therefore, the action of the elastic member 19 and the leak-proof wall W is combined, and the movement of the absorber part 2 is particularly effectively suppressed around the excretion region Q of the napkin 1 and is not completely fixed, that is, the width While allowing an appropriate movement in the direction, a good degree of freedom of wearing and a feeling of fit are obtained. On the other hand, in the rear from the excretion region Q, the distance between the leak-proof wall W and the absorber-side edge 2s is gradually increased so that the movement is larger in the rear than in the front. Thus, in addition to the suppression of the movement of the absorbent body in the width direction by the elastic member 19 on the side of the absorbent body and the improvement in fit to the body, the suppression of movement by the function of the leak-proof wall W is effective, Both can be made to act appropriately according to the function calculated | required by each site | part of a napkin. In addition, since the leakage preventing wall W is provided with a plurality of elastic members on the free end side, the leakage preventing wall W is less changed with respect to the movement of the absorber 2 and the main body 1 and the leakage preventing function is further stabilized. . Furthermore, it is preferable that an elastic member is disposed in the vicinity of the flexible wire Wu of the upright portion because the movement of the absorber can be suppressed and the adhesion follow-up performance by the free end portion of the leak-proof wall can be further improved.

  As described above, in the present embodiment, on the front portion side where the movement of the joining regions 31 and 32 and the leak-proof wall W is easy to be suppressed, the action due to the elastic stretching force with the elastic member 19 on the absorber portion side is relatively It may be small. On the other hand, it is preferable that the action of suppressing the movement of the elastic member 19 due to the elastic stretching force is large on the rear side from the excretion region Q. Taking this into consideration, it is preferable to adjust the balance of the magnitude of the elastic stretching force before and after the excretion region Q. As an example, the elastic member 19 on the side of the absorber part is located behind the front fixing part 31. It is preferable to arrange further rearward from a position 0 to 50 mm away from the end, and it is more preferable to arrange rearward from a position 10 to 30 mm away. Moreover, you may acquire the same effect by giving the process which an elastic member expresses a function in such an area | region. That is, in the present embodiment, the elastic member 19 disposed on the side of the absorbent body is assumed to have different functions in the front side portion and the rear side portion, and the shape, structure, material, and arrangement suitable for it Thus, it is preferable to suitably suppress the movement of the absorbent body portion 2 in the width direction. In particular, it is preferable to improve the fit by suppressing the movement and deformation of the absorber portion 2 at the rear portion, but it can be changed depending on the use conditions and needs. That is, according to the present invention, the elastic member and the leak-proof wall can be changed. Various forms can be provided by combinations of shapes and arrangements.

Leakage preventing walls W in the present embodiment has a standing base Wk on topsheet 12 of the main body portion 1, the upright wall portion W ₂ and a free end which is formed into a planar shape toward the skin face side by a plurality of resilient members and a flat portion _{W 1} of the Wt-side (see FIG. 3). In the present embodiment, the leak-proof wall W has a C-shaped or U-shaped cross section, and has a shape in which the free end Wt is directed outward in the width direction of the napkin. The height (h ₂ ) at the time of standing of the leak-proof wall is a distance when the main body 11 and the absorber 21 are not joined, that is, the height when both are in contact with each other including the excretion region Q. It is preferable that the height (h ₁ ) of the half-value thickness position of the second absorbent layer 22 of the absorbent body 2 is higher (see FIGS. 3 and 6). By doing in this way, the absorber part 2 which forms a separation | spacing part and protrudes to the skin side does not shift | deviate from the main-body part 1 at the time of use from the time of a mounting | wearing start, and a follow-up to operation | movement becomes still better. In the present embodiment, in order to support this standing state in the front-rear direction, the standing wall fixing portions Wa and Wc (see FIG. 1) are bonded from the position of the side edge 12s of the first absorbent layer 12 to the fixing portion end Wi. The side sheets 14 are bonded to each other through the agent 37. In this embodiment, the upright portion fixing portions Wa and Wb and the leak-proof wall W are formed by bonding and fixing necessary portions with an adhesive. Etc. may be performed.

In the present embodiment, the two elastic members 18 are fixed with the adhesive 36 so that the side sheet 14 is wound around the free end portion of the leak-proof wall W, and are arranged slightly apart from each other (see FIG. 3). By doing in this way, suppression of a motion of absorber part 2 can be performed much more effectively. In this embodiment in particular, because one of the elastic member 18 is disposed in the vicinity of Wu flexible line of the leakage preventing wall W, the planar portion W ₁ and the upright wall portion W ₂ is formed in a stable shape, It is preferable because the effect of suppressing the movement of the absorbent body 2 is further higher, and the high adherence followability to the skin surface on the leakage barrier free end side is obtained.

  In consideration of the above-described good uplifting action of the absorbent body portion 2 and no excessive wrinkling, the distance between the separable portions (between the auxiliary lines A and C) in the napkin longitudinal direction is 50 to 100 mm. It is preferable. Thereby, the above-described action is effectively exhibited, the followability is good, and the wearing feeling is good. Furthermore, in the present embodiment, since the non-skin surface side of the absorbent body 2 is liquid permeable, the liquid tends to easily move to the main body 1 and the liquid is guided to the first absorbent layer 12 where it is absorbed and retained. This is preferable because it is possible. Moreover, in this embodiment, the 2nd absorption layer 22 of the absorber part 2 is formed thinly in the longitudinal direction front-end edge area | region AD, CF compared with the excretion area | region Q. By doing in this way, it is preferable to suppress wrinkles of the absorbent body part 2 and its covering sheet 21, and the effect of suppressing the movement by the leak-proof wall is enhanced, and the contact between the absorbent body part 2 and the main body part 1 in the separable part is improved. This is preferable from the viewpoint of promoting liquid mobility.

  FIG. 4 is a plan view schematically showing the arrangement shape of the concave grooves as a modification of the sanitary napkin shown in FIG. 1 in relation to the absorber part and the main body part. As shown in the figure, the main body 1 preferably has a concave groove 41 that is compressed from the topsheet 1 side and reaches the first absorbent layer. At this time, it is preferable that the concave groove 41 is arranged so as to extend in the longitudinal direction on both sides in the width direction of the article as illustrated, and further, continuous in the width direction in the front end region and the rear end region, It is preferable that it is composed of a series of round embosses. Furthermore, as shown in the same figure, it is preferable that the absorber part 2 and the main-body part 1 are joined by the concave groove | channel 42 which squeezed both from the skin side in the front-end part and the rear-end part. At this time, the concave groove 42 may constitute a part of the seal portion 33 at the front and rear end portions. The concave grooves as described above can be formed by, for example, heat embossing applied to this type of article. By doing in this way, it can be made easy to absorb (draw out) a liquid to the main-body part 1 side especially in the part which overlaps with the absorber part 2. FIG.

  FIG. 5: is the expanded sectional view which showed the cross section corresponded to the AA cross section of FIG. 1 about another embodiment (Embodiment 2) of the sanitary napkin of this invention. In the present embodiment, the side elastic member 19 of the absorbent body portion 2 is arranged below the second absorbent layer 22 (on the main body portion 1 side), and has a structure in which it is directly covered with the covering sheet 21 without using an interior sheet. is doing. By arranging with such an elastic member, the surface sheet surface side is provided even if the second absorbent layer 22 and the first absorbent layer 12 are partially contracted by the contractive force of the elastic member 19 to give a strong contractive force. It is hard to form wrinkles and has excellent followability with the body. In addition, in this Embodiment 2, the thing of a low thing as the leak-proof wall W with respect to Embodiment 1 is shown as a modification.

  FIG. 6 is a side view schematically illustrating another embodiment (embodiment 3) of the sanitary napkin of the present invention as a wearing state (natural shape) of the relationship between the first absorbent layer and the second absorbent layer. is there. In the present embodiment, the main body 1 and the absorber 2 are connected via an elastic sheet 43 in the rear part. By setting it as such a form, the absorber part 2 is easy to curve by the influence of the said elastic sheet 43, and it is preferable from a viewpoint of improving the ease of mounting | wearing. FIG. 6 shows the assumption that the first absorbent layer 11 and the second absorbent layer 12 are connected by the elastic sheet 43 for the purpose of facilitating understanding. It is practical that the elastic sheet 43 is bonded to the top sheet 11 of the main body 1 and is also bonded to the covering sheet 21 of the absorbent body and both are connected. The joining of each member and the elastic sheet 43 at this portion can be performed by, for example, a hot melt adhesive or a heat seal method.

  In the second embodiment, the elastic sheet has substantially the same width as the width of the absorber 21, and is formed into a sheet by a plurality of thread-like elastic members or sheet-like elastic members and joined to the main body. At this time, since the elastic members 19 on the side of the absorber portion are arranged on both sides thereof, it is difficult to form wrinkles on the surface of the absorber portion, and it is easy to fit. At the same time, if the suppression of the movement of the absorbent body in the width direction is slightly weakened, this point is moved by suppressing the twist and twist by the elastic sheet 43 provided with a wide elastic function arranged at the rear. Can be suppressed.

Below, the constituent material in the napkin 10 in the said embodiment is demonstrated.
As the material of the elastic members 18 and 19, a normal elastic material used for absorbent articles such as disposable diapers and sanitary napkins can be used. For example, as a material, synthesis of styrene-butadiene, butadiene, isoprene, neoprene, etc. Examples include rubber, natural rubber, EVA, stretchable polyolefin, polyurethane, etc. The shape of the cross-section is rectangular, square, circular, polygonal or other thread or string (flat rubber, etc.), or multifilament A type of thread-like material can be used.

The same thing can be used for the surface sheet 11 of the main-body part 1, and the covering sheet 21 thru | or the interior sheet 24 of the absorber part 2, and an apertured film and a nonwoven fabric are preferable. In particular, preferred combinations of the heat fusion component and the high melting point component include polyethylene and polyethylene terephthalate, polyethylene and polypropylene, low melting point polyethylene terephthalate and polyethylene terephthalate, polyethylene and polybutylene terephthalate, and the like. It is not something. As the core-sheath type composite fiber, a 20-30 g / m ² air-through nonwoven fabric using a concentric type as well as an eccentric type is preferable from the viewpoint of reducing the influence of wrinkles generated by touch or curvature.

  As the second absorbent layer 22 of the absorbent body 2, it is preferable to use pulp alone, a composite of pulp and other fibers (composite of fiber material), or a composite of fiber material and superabsorbent polymer. When the fiber / particulate material is wrapped in paper or nonwoven fabric to form a sheet, the processability is facilitated and the above-described configuration of thickening the excretory part is easy. As the 1st absorption layer 12 of the main-body part 1, although it can comprise similarly to the said 2nd absorption layer 22, the liquid which was not able to be absorbed by the absorber part 2 is hold | maintained, and the softness | flexibility at the time of mounting | wearing is good. From the viewpoint of making it, an integrated sheet structure that can be formed thinner than an absorbent absorbent member, such as a dry pulp sheet or a polymer sheet in which a high-absorbent polymer is sandwiched between nonwoven fabrics, and is easy to express flexibility and low buckling properties as a sheet The body is preferred.

The back sheet 13 of the main body 1 may be a material having poor liquid permeability, and can use a moisture permeable or moisture permeable film material or fiber material of about 15 to 30 g / m ^2, and can be used for underwear. A film material is preferable from the viewpoint of easy transfer of the pressure-sensitive adhesive for fixing.

  As a sheet | seat of the back surface side of an absorber part, it is preferable that it is liquid permeability, and the same material as a surface sheet can be used. However, from the viewpoint of suppressing liquid diffusion due to liquid bleeding at the time of separation, it is preferable that the side area of the absorption section has poor liquid permeability and that the central area has liquid permeability. A spunbond nonwoven fabric or a sheet obtained by subjecting the center of a composite sheet of a spunbond nonwoven fabric and a meltblown nonwoven fabric to a hole opening treatment or a hydrophilization treatment is preferred. Moreover, the structure which distribute | arranges a hydrophobic sheet | seat to a side part, and does not distribute | arrange to a back surface side can also be used.

  As the side sheet 14 forming the leak-proof wall W, a fiber material having hydrophobicity and water repellency is preferable from the viewpoint of touch and leak-proof property, and a hydrophobic-treated air-through nonwoven fabric, a hydrophobic spunbond nonwoven fabric, Or the composite sheet of a spun bond nonwoven fabric and a melt blown nonwoven fabric is preferable.

  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 napkin of the above embodiment has a leak-proof wall shape in which the free end extends outward in the width direction, but the free end extends inward, or the free end of the standing wall portion. It may be in the form of a leak-proof wall having a T-shaped cross section with a planar portion joined on the side. Moreover, you may use for the surface sheet 11 and the coating sheet 21 what the uneven structure, the aperture shape, and those composite structures are formed.

DESCRIPTION OF SYMBOLS 1 Main-body part 11 Top sheet 12 1st absorption layer 13 Back sheet 14 Side sheet 15 Flap part 16 Joint part 17 Side wing part 18, 19 Elastic member 2 Absorber part 21 Covering sheet 22 2nd absorption layer 10, 20 Sanitary napkin (Absorbent article)
31 and 32 Joint part 33 End seal part W Leak prevention wall Q Excretion area

Claims (6)

  A sanitary napkin in which a main body part containing a first absorbent layer and a skin-side absorber part containing a second absorbent layer are both aligned in the longitudinal direction, the main body part and the absorption The body part can be separated without being joined in the central region in the longitudinal direction of the sanitary napkin, and is joined in the front end region or the rear end region in the longitudinal direction of the sanitary napkin, A sanitary napkin in which an elastic member having a length equal to or shorter than the length of the absorbent body portion is provided on the side portion along the longitudinal direction so as to extend in the longitudinal direction.   Furthermore, the sanitary napkin of Claim 1 which has a leak-proof wall which can stand on the skin side from the said main-body-part side, and is located in the width direction both sides outward of the said absorber part, and extends in a longitudinal direction.   The said absorber part does not have an elastic member in the junction part of the front-end part area | region of the said sanitary napkin, and has an elastic member in the junction part of the rear-end part area | region of the said sanitary napkin. Or the sanitary napkin of 2.   The sanitary napkin according to any one of claims 1 to 3, wherein a concave groove squeezed from a side where the absorbent body part is disposed is formed in the main body part so as to extend in a longitudinal direction of the sanitary napkin. .   The elastic member disposed in the absorbent body portion is equal to or shorter than the longitudinal length of the portion of the absorbent body portion that is not joined to the main body side at the center in the longitudinal direction of the sanitary napkin. The sanitary napkin of any one of -4.   The leak-proof wall has an elastic member disposed at the tip of the free end thereof, and the leak-proof wall at the front and rear ends of the leak-proof wall so that the free end faces outward in the width direction of the sanitary napkin. The sanitary napkin according to any one of claims 2 to 5, wherein the inner surface is directed to the skin side and the back surface is bonded and fixed to the main body.

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