JP2009153734A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article which is excellent in fitness, followability to the movement of a wearer and a wearing feeling and easy to increase an absorption capacity as well. <P>SOLUTION: The absorbent article 1 is provided with a liquid permeable surface sheet, a back surface sheet 3 and an absorbent 4 interposed between both sheets, wherein each of both side parts 12, 12 in the longitudinal direction is extensible in the longitudinal direction. Also, both side parts S and S in the longitudinal direction of the absorbent 4 are made extensible in the longitudinal direction by having a plurality of division parts 41 or the like respectively, and a deviation stop agent is applied to a part overlapped with both side parts S and S of the absorbent 4 on the surface 31 facing clothing of the back surface sheet 3 in such a form as not to stride across the division part 41. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an absorbent article such as a sanitary napkin, a panty liner (cage sheet), and an incontinence pad.

One way of preventing leakage in an absorbent article such as a sanitary napkin is to create as little gap as possible between the skin contact surface of the absorbent article and the skin of the wearer. In order not to generate a gap, it is effective that the absorbent article is deformed following the movement of the wearer, and for this reason, an absorbent article that is extensible is known (for example, see Patent Document 1). ).
In addition, apart from the technology that enables elongation, a thin absorbent sheet having a large absorption capacity that can be used as an absorbent body for absorbent articles such as scientific napkins has been proposed (for example, see Patent Document 2).
Moreover, the sanitary napkin which comprised the absorber from the several independent segment in series in the longitudinal direction is also known (refer patent document 3).

Japanese National Patent Publication No. 10-508225 JP-A-8-246395 JP-T 6-503249

The absorbent article described in Patent Document 1 is assumed to expand and contract together with the underwear while attached to the underwear. However, the absorbent article is easily deformed as a whole, and wrinkles, twists, and the like are likely to occur.
Further, if the absorbent sheet described in Patent Document 2 has the same thickness, the absorbent sheet tends to have higher rigidity than an absorbent body obtained by sucking and depositing pulverized pulp supplied in a scattered state. When used in a deformable absorbent article, the part located in the center in the width direction of the article is buckled in the longitudinal direction, and the creases, wrinkles, twists, etc. caused thereby are hard on the wearer. There are inconveniences such as a strange feeling and a stiff feeling.
The sanitary napkin described in Patent Document 3 does not have sufficient fit to the body shape.

  Accordingly, an object of the present invention is to provide an absorbent article that is excellent in fit, followability to the wearer's movement, and wearing feeling, and that can easily increase the absorption capacity.

  The present invention comprises a liquid-permeable surface sheet, a back sheet, and an absorbent body interposed between the two sheets, and each of the both sides in the longitudinal direction is an absorbent article having extensibility in the longitudinal direction, The both sides of the absorbent body in the longitudinal direction have a plurality of dividing parts, respectively, so that the absorbent body can be extended in the longitudinal direction, and overlaps the both sides of the absorbent body on the clothing facing surface of the back sheet Further, the object is achieved by providing an absorbent article in which the slip stopper is coated in such a manner that it does not straddle the divided part.

  The absorbent article of the present invention is excellent in fit, followability to the wearer's movement, and wearing feeling, and it is easy to increase the absorption capacity.

Hereinafter, the present invention will be described based on a preferred embodiment thereof with reference to the drawings.
A sanitary napkin 1 (hereinafter, also simply referred to as a napkin 1) according to the present embodiment includes a liquid-permeable surface sheet 2 and a liquid-impermeable (concept including impermeable) as shown in FIGS. A back sheet 3 and an absorber 4 interposed between the two sheets 2 and 3 are provided. The napkin 1 has a vertically long shape. The longitudinal direction of the napkin 1 is a direction that coincides with the wearer's front-rear direction when the napkin 1 is worn. The longitudinal direction of the absorbent body 4 is a direction that coincides with the longitudinal direction of the napkin 1.

Both side portions S, S in the longitudinal direction of the absorbent body 4 have a plurality of cuts (divided portions) 41 so that they can extend in the longitudinal direction. Further, the top sheet 2 and the back sheet 3 are extensible at least in the longitudinal direction of the napkin 1, and specifically, both extend and contract in the same direction as the longitudinal direction of the absorbent body 4 and in the same direction as the width direction. It has sex. Thereby, both the side parts 12 and 12 in the longitudinal direction of the napkin 1 have extensibility in the longitudinal direction of the napkin 1, respectively.
The top sheet 2 and the back sheet 3 cover the upper and lower surfaces of the absorber 4, and the portions extending from the periphery of the absorber 4 are joined to each other at the periphery 11 of the napkin 1.

As shown in FIGS. 1 and 3, the absorbent body 4 has a plurality of cuts (divided portions) 41 on both side portions S, S in the longitudinal direction.
More specifically, the plurality of cuts 41 in both side portions S, S in the longitudinal direction of the absorbent body 4 are formed intermittently at predetermined intervals in the longitudinal direction of the absorbent body 4. . Each notch is formed so as to extend in the width direction of the absorbent body 4. The cut in the present embodiment has a slit shape and is formed substantially parallel to the width direction of the absorber 4.
Absorber 4 does not have longitudinal extensibility when there is no cut (dividing part) 41, but has cut (divided part) 41, and they open to form both sides of absorber 4. S and S can be extended in the longitudinal direction (vertical direction in FIGS. 3 and 4).

The number and interval of notches (dividing portions) formed in the absorbent body 4 can be appropriately determined according to the size of the napkin 1 and the absorbent body 4.
It is preferable that the space | interval L1 (refer FIG. 3) between the notches 41 and 41 adjacent in the longitudinal direction of the absorber 4 is 1-5 cm, More preferably, it is 2-4 cm, More preferably, it is 2-3 cm. is there.
Moreover, 2-50 pieces are preferable and the number of the slits 41 (three shown in FIG. 3) of the longitudinal direction one side of the absorber 4 is more preferable, and 3-30 pieces are more preferable. If a more concrete example is shown, when the full length L (refer FIG. 3) of the absorber 4 is 8-20 cm, the number of the notches 41 of the one side of the absorber 4 will be 2-20, especially about 3-15. Is preferred.

  The depth L3 (see FIG. 3) of the cuts 41 of the absorber 4 is preferably 30 to 40%, more preferably, the width W (see FIG. 3) of the absorber 4 at the site where each cut is provided. Is 25-35%. In addition, it is preferable that L3 is 5-35 cm respectively, More preferably, it is 10-35 cm. The plurality of cuts 41 may have different depths L3, but in the napkin 1, the depths L3 of all the cuts 41 are the same.

  As shown in FIG. 2 and FIG. 4, a hot melt adhesive (displacement preventing agent) is provided on the clothing facing surface 31 of the back sheet 3 (the surface of the both surfaces of the back sheet 3 that is directed to the clothing side such as shorts when worn). ) Are applied in a predetermined pattern to form adhesive portions 51 and 52 for fixing the napkin 1 to clothing such as shorts.

  The napkin 1 has two types of adhesive portions 51 and 52. That is, as shown in FIG. 4, one adhesive part 51 is an adhesive part formed on a part of the garment facing surface 31 of the back sheet 3 that overlaps the longitudinal side parts S, S of the absorbent body 4, The other adhesive part 52 is an adhesive part formed in a portion of the clothing facing surface 31 of the back sheet 3 that overlaps the central portion M in the width direction of the absorbent body 4.

As shown in FIG. 4, the hot melt pressure-sensitive adhesive (displacement preventing agent) that forms the pressure-sensitive adhesive portion 51 is applied in a manner that does not straddle the cut (divided portion) 41 of the absorbent body 4. The phrase “not straddling the cut (dividing part) 41” means that the adhesive part (displacement application part) 51 is not continuous beyond the cut (dividing part) 41 in the longitudinal direction.
In the napkin 1, a plurality of adhesive portions 51, 51... Are intermittently formed on both side portions S, S in the longitudinal direction of the absorbent body 4 at intervals in the longitudinal direction. 51 has a horizontally long shape and is located at a substantially central portion between the front and rear cuts 41, 41.

  In the longitudinal direction of the napkin 1, the separation distance L4 (see FIG. 4) between the individual adhesive portions 51 and the cuts 41 and 41 located in front and rear thereof is the distance L1 between the cuts 41 and 41 (see FIG. 3). 0) to 45%, and more preferably 10 to 40%. Moreover, it is preferable that the length L5 (refer FIG. 4) of the absorber longitudinal direction of each adhesion part 51 is 20 to 95% of the space | interval L1 (refer FIG. 3) between notches 41 and 41, More preferably. Is 40-80%. The pressure-sensitive adhesive may be formed to be deviated in the longitudinal direction from the central portion between the cuts 41 and 41.

In the napkin 1, adhesive portions 51 are formed in the region between all the cuts 41, 41 on both side portions in the longitudinal direction of the absorbent body 4. Thereby, during wearing of the napkin 1, the gap between the napkin 1 and clothing such as shorts is less likely to occur.
Further, the adhesive portions 51 are also formed in the regions between the adhesive portions 51 a and 51 b at the longitudinal front and rear ends and the front and rear ends 4 a and 4 b of the absorber 4. Thereby, during wearing of the napkin 1, the gap between the napkin 1 and clothing such as shorts is less likely to occur.

The hot melt pressure-sensitive adhesive (displacement preventing agent) that forms the pressure-sensitive adhesive part 52 is continuously applied along the longitudinal direction of the absorbent body 4. The term “continuous along the longitudinal direction” means that the absorbent body 4 has a length extending between at least two cuts (divided portions) adjacent to each other in the longitudinal direction. As shown in FIG. It is preferable to have a length extending between the two cuts (dividing portions), and it is more preferable to have a length extending between the cuts 41a and 41b closest to the front and rear ends 4a and 4b of the absorber 4. .
When the absorbent body 4 has such an adhesive part 52, the structure of the absorbent article is stabilized because the top sheet 2 and / or the back sheet 3 and the absorbent body 4 are fixed in the center in the width direction. , Easy to hold and good wearability. Moreover, since the structure is stable during use, twisting and collapsing are less likely to occur.
In addition, it is preferable that the length of the adhesion part 52 in the longitudinal direction of the absorber 4 (napkin 1) is 50 to 95% of the full length L of the longitudinal direction of the absorber 4, More preferably, it is 60 to 90%. .

In the napkin 1, as shown in FIG. 3, the space between the top sheet 2 and the absorbent body 4 and the space between the absorbent body 4 and the back sheet 3 are arranged at the center M in the width direction of the absorbent body 4. Joined along the longitudinal direction. Specifically, the surface of the absorbent body 4 on the surface sheet 2 side is joined to the surface sheet 2 at a portion indicated by reference numeral 45 in FIG. It is joined to the back sheet 3 at a portion indicated by reference numeral 46 in the figure.
By joining the top sheet 2 and the absorbent body 4 and between the absorbent body 4 and the back sheet 3 in such a manner, the effect of stabilizing the wearability of the absorbent article and the shape at the time of use can be obtained. Have.

  Further, in the napkin 1, the joint between the top sheet 2 and the absorbent body 4 and between the absorbent body 4 and the back sheet 3 spans the cuts in the longitudinal side portions S, S of the absorbent body 4. It is joined so as not to occur. Specifically, the surface of the absorbent body 4 on the surface sheet 2 side is joined to the surface sheet 2 at a portion indicated by reference numeral 47 in FIG. 3, and the surface of the absorbent body 4 on the back surface sheet 3 side is illustrated in FIG. It is joined to the back sheet 3 at a portion indicated by reference numeral 48 in the figure.

By joining at least a part of both side portions 12, 12 in the longitudinal direction of the absorbent body 4 to the back sheet 3, the absorbent body between the cuts and the cuts can be easily folded or prevented from twisting. In addition, it is possible to prevent the slit 41 of the absorber 41 from becoming difficult to open by joining the absorbent body 4 and the back sheet 3 so that a joint portion that straddles the slit 41 does not occur. Better extensibility is obtained at the part.
In addition, by joining at least a part of both side portions 12 and 12 in the longitudinal direction of the absorbent body 4 to the topsheet 2, it is possible to prevent a sense of incongruity due to folding of the absorbent body between the cut and the cut during use. In addition, it is possible to prevent the slit 41 of the absorber 41 from becoming difficult to open by joining the top sheet 2 and the absorbent body 4 so as not to form a joint portion straddling the slit 41, and the absorbent body. A better extensibility can be obtained on both sides of 4.

Moreover, in this napkin 1, as shown in FIG. 3, between the surface sheet 2 and the absorber 4, a pair of notches 41 adjacent to each other in the longitudinal direction at both side portions in the longitudinal direction of the absorber 4. , 41 are joined only between each other. Moreover, between the absorber 4 and the back surface sheet 3 is joined only between the pair of adjacent cuts 41 and 41 adjacent to each other in the longitudinal direction on both sides in the longitudinal direction of the absorber 4. Only between a pair of cuts adjacent in the longitudinal direction means that there are three or more cuts adjacent in the longitudinal direction, and even if there are a plurality of regions sandwiched between the cuts, they are joined only in one of the regions. It means that
When the top sheet 2 and the absorber 4 and / or the absorber 4 and the back sheet 3 are joined in such a manner, the slit 4 of the absorber 4 is further prevented from being difficult to open. It is possible to obtain better stretchability on both sides of the absorbent body 4.

  Moreover, the followability of an absorbent article is expressed by fixing between the top sheet 2 and the absorber 4 and between the back sheet 3 and the absorber 4 between the same cuts 41 and 41. Therefore, when this portion is set as a position corresponding to the excretion part with little movement, the shape of the absorber near the excretion part is stabilized and the followability to the movement can be improved.

  The hot melt pressure-sensitive adhesive (displacement preventing agent) coating method for forming the pressure-sensitive adhesive portion 51 and the pressure-sensitive adhesive portion 52 may be solid coating with a slot coater or the like, or pattern coating with a pattern coating machine. Preferable examples of the pattern application pattern include a spiral pattern, a dot pattern, and a lattice pattern. As the hot-melt pressure-sensitive adhesive (anti-displacement agent), various kinds of conventionally used materials for fixing an absorbent article such as a sanitary napkin to clothing such as shorts can be used without particular limitation.

  In addition, although the joining in the said parts 45-48 is respectively preferable by joining with an adhesive agent, it can replace with an adhesive agent and can also use other arbitrary joining methods, such as a heat seal. Further, when joining with an adhesive, solid coating with a slot coater or the like may be used, but pattern coating is preferred. Preferable examples of the pattern coating application include spiral patterns, dot patterns, stripe patterns (striped patterns), lattice patterns, checkered patterns, and the like.

As shown in FIG. 5, the napkin 1 of the present embodiment is used by being fixed to the inner surface side (skin facing surface side) of the crotch portion of underwear (hereinafter also simply referred to as shorts) such as shorts.
When the napkin 1 is to be attached, the napkin 1 is fixed to the shorts 6 via the adhesive portions 51 and 52 and then the shorts are pulled up. The force that mainly deforms the cross-sectional shape in the width direction to be convex upward is mainly applied, and then the force that deforms the cross-sectional shape in the longitudinal direction of the napkin 1 to be concave is applied.
In the napkin 1 of the present embodiment, both side portions S, S in the longitudinal direction of the absorbent body 4 are flexibly extended by opening the cut 41 of the absorbent body 4, and the adhesive section 51 is inhibited from opening the cut 41. Since the napkin 1 is formed in such a manner that it is difficult to deform, both side portions S in the longitudinal direction of the absorbent body 4 are applied to the napkin 1 when a force that deforms the cross-sectional shape in the longitudinal direction into a concave shape is applied upward. , S extends smoothly, and the absorbent body 4 has a shape in which the longitudinal section thereof is gently curved concavely toward the skin contact surface side, and the cross section in the width direction is also gently curved convexly toward the skin contact surface side. It becomes the shape.
Therefore, the buckling of the absorbent body, in particular, the portion located at the center in the width direction of the napkin (absorbent article) is prevented from buckling in the longitudinal direction, and there is a sense of incongruity due to creases, wrinkles, twists, etc. caused by the buckling of the absorbent body. And discomfort can be prevented. Moreover, since both sides S and S of the extended absorber 4 can be contracted by receiving an external force, the follower with respect to the movement of the wearer is excellent, and the state fit to the wearer's body shape is stable. Maintained.

  In addition, in the napkin 1 of the present embodiment, both the top sheet 2 and the back sheet 3 have elasticity in the same direction as the longitudinal direction of the absorbent body 4 and in the same direction as the width direction. The part has elasticity in the longitudinal direction, and therefore the state fitted to the body shape of the wearer is more stably maintained. Even if either one of the top sheet 2 and the back sheet 3 has stretchability in the longitudinal direction of the absorbent body 4, the same effect can be obtained although it is somewhat inferior.

  In addition, it is preferable that the surface sheet and the back sheet in the absorbent article of the present invention each have at least extensibility in the same direction as the longitudinal direction of the absorbent body. Moreover, it is more preferable that the top sheet and the back sheet have extensibility in the same direction as the longitudinal direction of the absorber and in the same direction as the width direction of the absorber, respectively. Furthermore, the top sheet and the back sheet are preferably stretchable in the same direction as the longitudinal direction of the absorbent body, and stretchable in the same direction as the longitudinal direction of the absorbent body and in the same direction as the width direction of the absorbent body. It is preferable.

Here, “having extensibility” means that, for example, the elongation rate (length change) measured as follows is 10% or more, and the elongation rate is 20 to 40%. Is preferred.
Since a general material known to those skilled in the art does not have extensibility at a low load of about 50 g, a method for measuring the elongation rate by the following method can be easily used.
(Preparation of Test Specimen) The direction to be measured is the longitudinal direction, the direction orthogonal to this is the width direction, and the test piece is cut so as to be 12 cm long × 1 cm wide. For example, when measuring in the same direction as the longitudinal direction of the absorber, the length is 12 cm × 1 cm in the width direction, and when measuring in the same width direction, the length is 1 cm × 12 cm in the width direction.
(Measurement of low load elongation)
Measuring machine: Tensilon tensile tester RTM100 manufactured by Orientec Co., Ltd. was used.
Measurement conditions: Distance between chucks: 10 cm
Pulling speed: 100 mm / min Measurement is performed in the pulling direction, and the apparatus is stopped when the load is pulled to 50 g.
Read the change in the length of the test piece by measuring the chart or the distance between chucks, and calculate the elongation rate as follows.
Elongation rate (%) = length variation (mm) / original specimen length (mm) × 100

Further, “having stretchability” means, for example, that the permanent strain of the material measured in the same manner is almost completely recoverable, and the permanent strain is preferably within 5%.
It is most convenient to measure the recovery process of the test piece following the measurement of the elongation rate.
Immediately after measuring the elongation rate, Tensilon is restored to the original distance between chucks. Measurement speed at this time is 100 mm / min.
From the chart, read the point where the tensile load is 0 g. In the case of a material that expands and contracts completely, 0 g becomes the point of 0 mm elongation, and in the case of an incomplete stretchable material, it becomes 0 g on the front side (position where the elongation of several mm to several cm is left). The elongation rate at the 0 g position is defined as permanent distortion. That is,
Permanent strain (%) = 0 g Elongation at restoration (mm) / Original specimen length (mm) × 100

  In this napkin 1, the top sheet 2 includes a first fiber layer containing heat-shrinkable fibers and fibers that do not substantially heat shrink or fibers that do not substantially heat shrink at the shrinkage start temperature of the heat shrinkable fibers. After laminating and partially bonding the second fiber layer, an uneven sheet obtained by shrinking the first fiber layer by hot air treatment is used. In this concavo-convex sheet, the second fiber layer protrudes at a portion other than the joint portion with the first fiber layer to form a convex portion, while the joint portion forms a concave portion. The second fiber layer side of the concavo-convex sheet is used toward the wearer's skin. Since this concavo-convex sheet forms a dense layer of the contracted first fiber layer, when the absorbent body 4 containing a water-absorbing polymer is used, even if the water-absorbing polymer leaks from the cut, It is possible to prevent the water-absorbing polymer from leaking to the skin contact surface of the napkin 1. The heat-shrinkable fiber is preferably a latent crimpable fiber. As such an uneven sheet, those described in JP 2002-187228 A, JP 2003-250836 A, JP 2004-166849 A, JP 2004-202890 A, and the like can be used.

  The latent crimpable fibers are those that develop coiled crimps by heat treatment, for example, an eccentric core-sheath type composite fiber or side-by-side composite containing two types of thermoplastic polymer materials having different shrinkage rates. -Made of side type composite fiber. Examples thereof include those described in JP-A-9-296325 and JP2759331A. As the constituent fiber of the second fiber layer, a fiber made of a thermoplastic polymer material is preferably used. Examples of the thermoplastic polymer material include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate, and polyamides. A core-sheath type or side-by-side type composite fiber made of a combination of these thermoplastic polymer materials can also be used.

  As the surface sheet 2, those conventionally used for this type of article can be used without any particular limitation. As another preferable elastic sheet that can be used as the surface sheet 2, (a) urethane resin is used. A stretchable sheet formed by hydrophilizing the spunbond nonwoven fabric, (b) after stretching the spunbond nonwoven fabric using urethane resin in at least one direction, laminating an air-through nonwoven fabric on it and bonding them with dot-like embossing, An uneven nonwoven fabric obtained by release, (c) a film having a three-dimensional aperture formed from an elastic resin such as urethane or EVA, and the like made hydrophilic, may be mentioned.

In addition, as the back sheet 3, those conventionally used for this type of article can be used without particular limitation, but as a preferable stretchable sheet that can be used as the back sheet 3, urethane or metallocene catalyst is used. Examples thereof include a film obtained from the obtained polyolefin resin and a polyester-based elastic film.
In the case where an extensible or stretchable sheet is used as the top sheet 2 and / or the back sheet 3, the bonding between the two at the peripheral edge 11 of the napkin 1 can be performed using hot melt adhesive or the like from the viewpoint of not inhibiting the stretchability and stretchability. It is preferable to carry out via an adhesive.

  In the napkin 1 of the present embodiment, as the absorbent body 4, a sheet-shaped absorbent body made of an absorbent sheet containing a fiber material and a water-absorbing polymer is used. The absorbent sheet is formed by bonding the water-absorbing polymer to the constituent fibers through the adhesive force generated in the water-absorbing polymer in the wet state or a separately added adhesive or adhesive fiber. This is preferable from the viewpoint of little dropping of polymer.

  As the absorbent sheet, for example, an absorbent sheet manufactured by the method described in JP-A-8-246395, pulverized pulp supplied in an air stream and a water-absorbing polymer are deposited, and then an adhesive (for example, acetic acid) is used. Dry sheets hardened with vinyl adhesives, PVA, etc.) Absorbent sheets obtained by spraying a superabsorbent polymer after applying hot melt adhesive between paper and nonwoven fabric, spunbond or meltblown nonwoven fabric An absorbent sheet or the like obtained by blending a superabsorbent polymer during the production process can be used. These absorptive sheets can be used as a sheet-like absorber by cutting one sheet into a predetermined shape. In addition, a plurality of absorbent sheets are bonded together to form a multilayer sheet, or a single absorbent sheet is folded and the layers are bonded to form a multilayer sheet, and the multilayer sheet thus obtained is absorbed into a sheet. It can also be used as a body.

  In order to form a cut in the absorbent body 4, the absorbent body 4 may be cut by a known cutting means. However, when an absorbent body containing a water absorbent polymer is used, from the viewpoint of preventing the water absorbent polymer from leaking out. In addition, heat-fusible materials such as thermoplastic fibers and hot-melt adhesives are included in the absorbent body, and heat-fusible in the pre-process or post-process of cutting at the same time or at least at the cutting position with a heated cutter. It is also preferable that the material is melted and sealed with the melted heat-fusible material so that the water-absorbing polymer does not leak from the cut surface.

The present invention is advantageous in that even if an absorber having relatively high rigidity is used, the absorber can be deformed into a shape as shown in FIG.
Examples of the absorber having relatively high rigidity include those having a rigidity of 30 to 300 cN, particularly 50 to 200 cN.
The rigidity here is measured in accordance with the bending resistance measurement method defined in JIS L1096 (General Textile Testing Method).
Specifically, a handometer tester manufactured by Daiei Kagaku Seisaku Seisakusho Co., Ltd., which conforms to the bending resistance measurement method, is used. Place the test piece on the sample table adjusted to 30 mm between the slots so that the measurement site of the test piece is located at the center between the slots and the length of the test piece along the longitudinal direction of the absorber is orthogonal to the slot. It is arranged horizontally so that it coincides with the direction. Do not fix the specimen on the sample stage. A blade adjusted so as to descend to a position (lowermost position) 8 mm below the surface of the sample stage is lowered from above the test piece at a constant speed of 200 mm / min. Then, the maximum value (cN) indicated by the indicator (load meter) when the test piece is pressed back and forth in the length direction is read. The measurement was performed 5 times, and the average value was calculated as the stiffness value.

The absorber preferably has a thickness of 2 to 7 mm, particularly 2.5 to 5 mm, and preferably has a basis weight of 40 to 250 g / m ² , particularly 55 to 180 g / m ^2. . If the thickness or basis weight of the absorber is smaller than the above range, twisting or folding tends to occur, and if it is larger than the above range, the followability tends to be poor.

As mentioned above, although one Embodiment of this invention was described, this invention is not restrict | limited to embodiment mentioned above, A various change is possible.
For example, in the above-described napkin 1, the adhesive portion 51 and the adhesive portion 52 are separated from each other. However, as shown in FIG. 6A, the adhesive portion 51 and the adhesive portion 52 may be continuously formed. good.
Moreover, the adhesion parts 51 and 52 may be formed in an aspect as shown in FIG.6 (b)-FIG.6 (d).
In the example shown in FIG. 6B, the adhesive portions formed on both sides in the longitudinal direction of the absorbent body 4 are composed of two small adhesive portions 51a and 51a divided in the width direction. In the example shown in FIG. 6 (c), the adhesive portions 51, 51 formed on both side portions in the longitudinal direction of the absorbent body 4 are continuous via the portions 53 located at the center portion M in the width direction of the absorbent body 4. ing. In the example shown in FIG. 6 (d), the adhesive portions 51, 51 are formed on both side portions in the longitudinal direction of the absorbent body 4, but the adhesive portion has a portion overlapping the central portion M in the width direction of the absorbent body 4. 52, the adhesion part 53, etc. are not formed.

  Further, as the slippage preventing agent, in place of the pressure-sensitive adhesive, those having no adhesiveness in a commercially available state can be used. For example, a synthetic resin-made fixing material (male / female male material) formed in a hook shape so that it can be directly fixed to the underwear to be worn can be used.

Further, the slit 41 of the absorber 4 is not limited to the one parallel to the width direction of the absorber, and even if the slit 41 has an angle with respect to the width direction of the absorber as shown in FIG. good. The cut angle with respect to the width direction of the absorber 4 can be set to, for example, 0 ° to less than 45 °, preferably 0 ° to less than 30 °.
Further, the slit of the absorber 4 is not limited to a linear shape in a natural state, and may be a narrow triangle shape or the like in a plan view like a slit 41 shown in FIG. .

Moreover, as shown in FIG.7 (c), as for the absorber 4, the formation position of the cut | notch 41 may differ in the one side part in the longitudinal direction of an absorber, and the other side part.
The absorbent body 4 may be formed by laminating two sheet-shaped absorbent bodies each having a plurality of cuts at portions located on both sides in the longitudinal direction of the absorbent body 4. In this case, the adhesive part 51 and / or the adhesive part 52 may be formed in the same manner as the napkin 1 with the cut (cutting part) of the sheet-shaped absorbent on the side close to the back sheet 3 as a reference (partition part). preferable.

In addition to the sanitary napkin, the absorbent article of the present invention may be a panty liner (cage sheet), an incontinence pad, a disposable diaper, or the like.
In addition, the description omitted in one embodiment and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately applied between the embodiments. Can be substituted for each other.

1 is a perspective view illustrating a sanitary napkin according to an embodiment of the present invention with a part thereof broken. It is the II-II line schematic cross section of FIG. It is a figure which shows the absorber of the sanitary napkin shown in FIG. 1, Fig.3 (a) is a surface by the side of a surface sheet, FIG.3 (b) is a figure which shows the surface by the side of a back surface sheet. It is a top view which shows the clothing contact surface (surface by the side of a back surface) of the sanitary napkin shown in FIG. It is a perspective view which shows the deformation | transformation shape at the time of wear of the sanitary napkin shown in FIG. FIG. 6A to FIG. 6D are schematic views showing a coating mode of a slip stopper in another embodiment of the present invention. Fig.7 (a)-FIG.7 (c) are schematic plan views which show the absorber in other embodiment of this invention.

Explanation of symbols

1 Sanitary napkin (absorbent article)
2 Top sheet 3 Back sheet 4 Absorber 41 Notch (parting part)
51,52 Adhesive section 6 Shorts (underwear, clothing)

Claims (5)

A liquid permeable top sheet, a back sheet and an absorbent article interposed between the two sheets, each of the both sides in the longitudinal direction being an absorbent article having extensibility in the longitudinal direction,
The both sides of the absorbent body in the longitudinal direction have a plurality of dividing parts, respectively, so that the absorbent body can be extended in the longitudinal direction, and overlaps the both sides of the absorbent body on the clothing facing surface of the back sheet In addition, the absorbent article is coated in such a manner that the slip prevention agent does not straddle the divided part.   The absorptive article according to claim 1 in which at least one part of said both sides of said absorber is being fixed to said surface sheet or said back sheet.   The absorbent article according to claim 2, wherein the space between the top sheet and the absorbent body and the space between the back sheet and the absorbent body are fixed between the same divided portions on the both side portions of the absorbent body.   The slip stopper is continuously applied along the longitudinal direction of the absorbent body on the clothing facing surface of the back sheet, which overlaps the central portion in the width direction of the absorbent body. The absorbent article in any one.   The absorptive article according to any one of claims 1 to 4 in which said back sheet has elasticity in the longitudinal direction of said absorptive article.

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