JP2006141721A - Absorptive article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article which is excellent in shape stability in the case of mounting and satisfactory in fitting property to the body by making the article hard to twist. <P>SOLUTION: The absorptive article 1 is provided with a front face sheet constituting a skin abutting face 2, a rear face sheet constituting a non skin abutting face 3 and an absorptive layer 4 arranged on the side of the skin abutting face, and is formed to be oblong substantially. The absorptive layer 4 has parts of different number of layers in its width direction, and has a means 5 for stabilizing a mounting shape at a part where the number of the layers is large at the absorptive layer 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

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

  Absorbent articles in recent years are becoming thinner, and for example, the present applicant uses a thin absorbent sheet in the following patent document, and is thinner and more absorbent than conventional absorbent articles. Has applied for a patent.

  By the way, since such a thin absorbent article is thin, a gap between the thin absorbent article and the body is likely to occur when it is distorted by movement when worn on the body. For this reason, the stability of the shape at the time of mounting | wearing on a body is calculated | required highly. On the other hand, the present applicant has proposed the technique described in Patent Document 2 below regarding the fit of the absorbent article. In addition, in order to make it difficult to cause warping and warping while maintaining flatness during mounting, it has been proposed to enhance the bending resistance in the central region (see Patent Document 3 below). However, even if these techniques are directly applied to an absorbent article using a thin absorbent sheet as described above, the desired shape stability could not be sufficiently obtained.

Japanese Patent Laid-Open No. 9-156014 JP-A-10-99372 JP 2000-225138 A

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an absorbent article that is difficult to twist, has excellent shape stability when worn, and has good fit to the body.

  The present invention comprises a top sheet that constitutes a skin contact surface, a back sheet that constitutes a non-skin contact surface, and an absorbent layer that is interposed between both sheets, and is substantially vertically formed. To provide an absorbent article, wherein the absorbent layer has a portion with a large number of layers in the central region in the width direction, and has a means for stabilizing the mounting shape in the portion with the large number of layers. Thus, the object is achieved.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which is hard to twist, is excellent in the shape stability at the time of mounting | wearing, and has favorable fitting property to a body is provided.

Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.
1 to 3 schematically show a first embodiment in which the absorbent article of the present invention is applied to a sanitary napkin. In these drawings, reference numeral 1 denotes a sanitary napkin (hereinafter also simply referred to as a napkin).

  As shown in FIGS. 1 and 2, the napkin 1 according to this embodiment includes a skin contact surface 2, a non-skin contact surface 3, and a skin contact surface 2 and a non-skin contact surface 3. The absorbent layer 4 is formed and is substantially vertically long. The skin contact surface 2 is composed of a top sheet, the non-skin contact surface 3 is composed of a back sheet, and the absorbent layer 4 is disposed between both sheets. The skin contact surface 2 of the napkin 1 is formed with a recess 20 by embossing from the skin contact surface 2 side in order to increase the absorbability from the top sheet and prevent the absorbent layer 4 from being swayed (however, In FIG. 2 (b), the recess 20 is omitted for convenience.) The concave portion 20 is formed outside the central absorbent portion 40 described later. It is preferable that the recess 20 reaches the vicinity of the lower part of the absorbent layer 4.

  The surface sheet which comprises the skin contact surface 2 is comprised from a liquid-permeable sheet. As the liquid permeable sheet, a liquid permeable sheet conventionally used for this type of absorbent article can be used without particular limitation. The liquid permeable sheet is not particularly limited as long as it allows the liquid to permeate the absorbent layer 4, but a sheet having a feeling close to underwear is particularly preferable. Examples of such a liquid-permeable sheet include a woven fabric, a nonwoven fabric, and a porous sheet of a thermoplastic resin. In particular, the core-sheath structure type (including side-by-side type) composite fiber using polypropylene or polyester as the core component and polyethylene as the sheath component is webbed by carding to give a touch close to that of underwear, and then non-woven by the air-through method. (It is possible to apply a hole opening treatment to a predetermined place thereafter), and from the point of high liquid permeability (dry feeling), an opening sheet made of polyolefin such as low density polyethylene is preferably used. Can do.

  The back sheet constituting the non-skin contact surface 3 is preferably composed of a liquid-impermeable sheet. As the liquid-impermeable sheet, a liquid-impermeable sheet conventionally used for this type of absorbent article can be used without any particular limitation. As such a liquid-impermeable sheet, for example, a thermoplastic resin added with an inorganic compound or an organic compound filler is melt-extruded from a T die or a circular die to form a film, and then the film is uniaxially formed. Alternatively, a moisture-permeable sheet obtained by biaxial stretching can be used. It is also preferable from the viewpoint of air permeability and flexibility to use a sheet (for example, SM, SMS, SMMS, etc.) in which a spunbond nonwoven fabric and a meltblown nonwoven fabric are combined. In addition, when a leak-proof sheet is interposed on the non-skin contact surface of the absorbent layer, the back sheet may not be liquid-impermeable.

  The absorbent layer 4 has a configuration in which thin absorbent sheets are laminated. Examples of the absorptive sheet used for the absorptive layer 4 include the absorptive sheet described in the column of [Embodiment of the Invention] in Patent Document 1. In addition, a sheet in which a polymer is fixed between two sheets of paper by adhesive or adhesiveness when wet, a sheet in which a polymer is dispersed during the production of a melt blown nonwoven fabric, and the polymer is fixed at the same time as the nonwoven fabric. The sheet | seat etc. which superposed | polymerized and fix | immobilized are preferably used as a thin absorbent sheet.

  The absorptive layer 4 has a place with many layers in the center area | region of the width direction. Here, the center region in the width direction refers to a region in the range of 15 to 25 mm on both sides from the center in the width direction of the napkin 1, and in the napkin 1 of the present embodiment, it is the same as the width of the absorbent sheet 41 described later. It is. In the napkin 1, the absorptive layer 4 is laminated | stacked many absorptive sheets in the center absorption part 40 of the position corresponding to an excretion site | part, and the absorption performance is improved rather than another part.

  As shown in FIG. 2 (a), the central absorbent portion 40 is provided with two absorbent sheets 41 superimposed and another absorbent sheet 42 arranged on the outside of these absorbent sheets 41. It has been. The central absorbent portion 40 has a portion having a different number of absorbent sheets, that is, a two-layer portion 402 of only the absorbent sheet 42 and a four-layer portion 404 therebetween. In FIG. 2A, each sheet is drawn with a gap for convenience, but in actuality, each sheet is in close contact. As for the napkin 1, in the center absorption part 40, the absorptive layer 4 has a part from which the number of layers differs in the width direction.

The thickness T4, the length L4, and the width W4 of the absorbent layer 4 shown in FIGS. 2A and 2B are appropriately set according to the use scene of the wearer. In consideration of not giving as much resistance or discomfort as possible when the napkin is worn, the preferred thickness T4 of the absorbent layer 4 is preferably 1 to 5 mm, and more preferably 1.5 to 3 mm. The length L4 is 250 to 450 mm, and the width W4 is 60 to 85 mm.
Considering that no resistance is given to bending in the product length direction, the central absorbent portion 40 has a front end located 40 to 100 mm from the frontmost end of the absorbent layer 4 (in FIG. The length L40 is preferably 80 to 140 mm. The length L40 of the central absorbent layer 40 is preferably 25 to 60% of the length L4 of the absorbent layer 4.

  The napkin 1 of the present embodiment is a means (hereinafter simply referred to as a means for stabilizing the mounting shape) at a portion having a large number of layers of the central absorbent portion 40, that is, at both side edges and the central portion of the portion 404 having the four layers. It is also called a stabilizing means.

  The stabilization means 5 includes a compression portion 54 provided discontinuously at both side edges and the central portion of the four-layer portion 404 in the central absorption portion 40. The compression parts 54 are discontinuously provided in the central absorption part 40 in three rows in the width direction with a predetermined interval in the longitudinal direction. Providing the compression part 54 discontinuously in this way does not impair the bending direction in the longitudinal direction (front-rear direction) of the napkin 1 and easily bends at the boundary between a part with a large number of sheets (layers) and a part with a small number. As shown in FIG. 3, when the napkin 1 is attached to the body of the central absorbent portion 40, where the rigidity tends to be high in a portion where there is a large amount, the rigidity is uniform from the central portion to both side edge portions, and the central absorption portion 40 is attached. The convex shape can be stably maintained as a whole in the width direction without bending the portion 40 locally, particularly at the boundary between the portion 404 with many layers and the portion 402 with few layers. As a result, it is possible to suppress the formation of a gap between the skin contact surface 2 of the napkin 1 and the body B. The rigidity in the width direction of the absorber is 50 to 80% of the rigidity before the stabilization process due to the stabilization process, but the rigidity in the longitudinal direction is almost unchanged, and before the stabilization process. In comparison, the rigidity is 90 to 110%. The rigidity value after the preferable stabilization treatment is 0.5 to 2.5 cN / cm.

  Moreover, the compression part 54 is pressed and provided from the non-skin contact surface 3 side of the absorptive layer 4 from a viewpoint of improving the contact property of the absorptive layer 4 and a surface sheet, and making a movement of a liquid favorable. It is preferable. The compression part 54 can be provided by, for example, passing it through a heat embossing roller having a convex part corresponding to these arrangement positions. The compression part 54 is preferably provided with a heat-bonded part by compressing the absorbent sheets and further heat-bonding them.

  As shown in FIG. 2, the distance d between the boundary between the portion with a large number of layers and the portion with a small number (in this embodiment, the boundary between the two-layer portion 402 and the four-layer portion 404) and the compression unit 54 is the boundary portion. In consideration of mitigating the kinking of the side part that is affected by the influence of flexibility due to the difference in the number of layers, 3 to 10 mm is preferable. Further, the distance dw54 in the width direction of the compression portion 54 is preferably 5 to 15 mm in consideration of not increasing the rigidity with respect to the bending in the product width direction. Furthermore, considering that the rigidity is not increased with respect to the bending in the product length direction, the interval dl54 in the longitudinal direction of the compression portion 54 is preferably 5 to 15 mm.

The depth of the compression unit 54, the area of the compression unit 54, and the total area of the compression unit 54 are set according to the number of layers of the central absorption unit 40. In consideration of not giving resistance to the bending in the product length direction and the width direction, the depth of the compression portion 54 is preferably 2 to 5 mm, and the individual area of the compression portion 54 is 0.7 to ⁴ mm ^2. The total area of the compression part 54 is preferably 10 to 75 mm ² .

  As described above, the napkin 1 of the present embodiment has the compression portions 54 at the center portion and both side portions of the portion 404 having a large number of layers in the central absorbent portion 40 of the absorbent layer 4 as the stabilizing means 5. Therefore, it is possible to prevent bending at the boundary between the portion having a large number of layers and the portion having a small number of layers in the central absorbent portion 40 and to make the entire central absorbent portion 40 flexible and uniform. For this reason, it is hard to sway, the shape when the napkin 1 is attached to the body is stable, and the fit to the body is good.

  FIG. 4 schematically shows another embodiment in which the absorbent article of the present invention is applied to a napkin, and corresponds to FIG. In these drawings, portions common to the central absorbent portion 40 in the absorbent layer 4 of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Therefore, the description in the first embodiment is appropriately applied to a portion not particularly described.

  In the napkin 1 ′ of the second embodiment shown in FIGS. 4 (a) and 4 (b), both side portions of the skin contact surface 2 are covered with the side sheets 6 of the surface layer of the wing portion, and the side sheets 6 It has the form joined to. The side sheet 6 is a known side sheet conventionally used for this type of napkin, for example, a non-woven fabric obtained by treating the surface of the same fiber as the liquid-permeable surface sheet with a water-repellent oil agent. Alternatively, a spunbond nonwoven fabric, a composite sheet of a spunbond nonwoven fabric (S) and a melt blown nonwoven fabric (M) (for example, SM, SMS, SMMS, etc.) can be used. By using a hydrophobic or water-repellent sheet for the side sheet, an effect of reducing side leakage can be obtained.

  The central absorbent portion 40 of the napkin 1 ′ is opposed so that both end portions of one absorbent sheet 41 do not overlap with the substantially central portion on the upper side (surface sheet side) or have a slight gap G 41. While being bent, an absorbent sheet 41 is provided by being wrapped in an absorbent sheet 42. The end portion of the absorbent sheet 42 is overlapped with an overlapping width W42 at a substantially central portion below the absorbent sheet 41 (on the back sheet side). In FIG. 4A, each sheet is drawn with a gap above and below for the sake of convenience, but in actuality, each sheet is in close contact and there is no gap on both sides of the absorbent sheet 42. Is bent. The gap G41 is preferably 0 to 3 mm in consideration of not giving resistance to bending in the product width direction. The overlap width W42 is preferably 2 to 15 mm for the same reason.

  In the above layer configuration, the central absorbent portion 40 has a substantially two-layer portion 402 of only the absorbent sheet 41, a four-layer portion 404 and a five-layer portion (except for the gap G41) 405 therebetween. And the absorptive sheet in the center absorption part 40 has the stabilization means 5 in the part 404 of 4 layers.

  The stabilizing means 5 is composed of a plurality of elliptical compression parts 54 provided discontinuously on the four-layer part 404 in the central absorption part 40. The compression parts 54 are provided discontinuously with two rows in the width direction of the central absorption part 40 at intervals dw54 and at intervals dl54 in the longitudinal direction.

  The napkin 1 ′ of the present embodiment further includes, as the stabilizing means 5, the compression portion 54 and the absorbent sheets 41 and 42 in the central absorption portion 40 in the four-layer portion 404 having a large number of layers in the central absorption portion 40. Similar to the napkin of the first embodiment, the end portion is bent at the boundary between the portion having a large number of layers and the portion having a small number of layers, as in the case of the napkin of the first embodiment. In addition, the central absorbent portion 40 as a whole can be made flexible and uniform. Therefore, it is difficult to twist, the shape when the napkin is attached to the body is stable, and the fit to the body is good.

  The present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.

  The absorptive article of the present invention is a stabilizing means such as a compression part (or heat bonding part) by a heat embossing roll as in the first embodiment shown in FIG. 2 or the second embodiment shown in FIG. Although it is preferable to have a combination of a compression part (or heat bonding part) by a heat embossing roll and a laminated structure of the end part of the absorbent sheet, the stabilizing means is not limited to these forms. In order to realize the stabilization means in a more enhanced form, when the central absorbent portion is divided into three equal parts in the width direction, one or more stabilization means are formed in each of the side region and the central region. The resulting product is preferred because it is difficult to sway, stabilizes the shape when worn on the body, and improves the fit to the body. Further, it is preferable to stabilize the wearing shape by combining a plurality of types of stabilizing means in the central region of the central absorbent portion, from the viewpoint that the fit of the central absorbent portion to the body can be improved. As a combination of such stabilizing means, a compression part (or heat bonding part) by a heat embossing roll as in the embodiment shown in FIG. 5 and FIGS. 6A and 6B described below and Various stabilizing means can be formed by a combination with the laminated structure at the end of the absorbent sheet.

  5 and 6 schematically show a central absorbent portion of an absorbent layer in another embodiment in which the absorbent article of the present invention is applied to a napkin. In these drawings, the first embodiment is shown. In the absorbent layer 4, portions that are common to the central absorbent portion 40 are given the same reference numerals, and descriptions thereof are omitted. Therefore, the description in the first embodiment is appropriately applied to a portion not particularly described.

  The central absorbent portion 40 ′ of the absorbent layer in the napkin of the third embodiment shown in FIG. 5 is the two-layer absorbent sheet 41 constituting the central absorbent portion 40 of the napkin of the first embodiment, the napkin of the second embodiment. In the same manner as the central absorbent portion 40 in FIG. The central absorbent portion 40 ′ of this embodiment has a form in which the absorbent sheet is long in the width direction of the central absorbent portion 40 ′ on the side portion of the four-layer portion (portion with many layers) 404 as the stabilizing means 5. While having the compression part (or heat junction part) 54 arrange | positioned in the staggered arrangement | sequence of 2 rows within the said predetermined width, the absorptive sheet of the center area | region of center absorption part 40 'is also in the 5-layer part 405. A circular compression part (or thermal bonding part) 54 is provided. Like the napkin of the first embodiment, the napkin provided with the central absorbent portion 40 ′ of the present embodiment is difficult to sway, has a stable shape when the napkin is attached to the body, and has good fit to the body. In addition, the bending of the longitudinal napkin is stabilized.

The absorbent article of this invention can change the stabilization means which an absorbent layer has with the laminated structure of each absorbent sheet of a center absorption part.
For example, like the central absorbent portion 40 ′ in the napkin of the fourth embodiment shown in FIG. 6A, the double-layer absorption constituting the central absorbent portion 40 in the napkin of the third embodiment (see FIG. 5A). It is also possible to wrap the adhesive sheet 41 with a single absorbent sheet 42 and abut both ends thereof.
Moreover, like the center absorption part 40 'in the napkin of 5th Embodiment shown in FIG.6 (b), the absorbent sheet 41 of the center absorption part 40 in the napkin of 3rd Embodiment is not overlap | superposed below, It can also be set as the form which abuts both ends. In this case, it is preferable to omit the compression part 54 in the central region of the central absorption part 40 ′.

  Further, the arrangement of the compression portion and the thermal bonding portion provided in the central absorption portion is not limited to the above embodiment, and can be appropriately changed within a range not impairing the effect of the present invention. Moreover, the form of the compression part 54 is not restrict | limited to the form of each said this embodiment, It can employ | adopt combining various forms as needed.

  In addition, the absorbent article of the present invention is a known shift that has been conventionally used for preventing the absorbent article from slipping on the surface of the back sheet constituting the non-skin contact surface within a range that does not impair the effects of the present invention. A stop layer can be provided.

  The absorbent article of the present invention is suitable for absorbent articles such as panty liners, disposable diapers, incontinence pads, sweat pads, etc., in addition to the sanitary napkin as in the above embodiment.

  Hereinafter, the present invention will be described more specifically with reference to examples.

  As in Examples 1 to 3 and Comparative Example 1 below, a napkin was prepared as an evaluation sample. Then, the napkin was mounted in a pseudo manner using a transparent model made of resin for mounting the napkin, and the mounting state was visually observed and evaluated as follows.

[Example 1]
In the form shown in FIGS. 2 (a) and 2 (b), an napkin as an evaluation sample was produced. The external shape of the napkin was 300 mm in total length L1, 160 mm in total front wing width W1, and 115 mm in length from the tip of the napkin to the center of the front wing.
Liquid-permeable sheet (surface sheet): An air-through non-woven fabric (a perforated sheet used for “Laurier Super Slim Guard” manufactured by Kao Corporation) was used.
Liquid-impermeable sheet (back sheet): A polyethylene film having a thickness of 25 μm was used.
Absorbent sheet: For the absorbent sheet (41, 42), a sheet in which a water-absorbing polymer is fixed in a dispersed state on the same pulp fiber (absorbent sheet used for "Laurier Super Slim Guard" manufactured by Kao Corporation) used.
Absorbent layer: After the two absorbent sheets (L40 = 90, W41 = 35 mm) are overlaid, the two absorbent sheets (length L4 = 270 mm, width W4 = 75 mm, front and rear ends) The portion is a predetermined curved shape) to form an absorbent layer (S40 = 55 mm, T4 = 2.1 mm).
Stabilization means: The central absorbent portion of the absorbent layer is compressed from the outside of the liquid-impermeable sheet with an embossing roller having three rows of columnar projections having a diameter of 1 mm at predetermined intervals in the length direction, and the indentation (depth 1.5 mm, dl54 = 10 mm, dw54 = 7.5 mm, d = 8.5 mm) were provided as stabilizing means.
Napkin: The absorbent layer was disposed at a predetermined position between the liquid-permeable sheet and the liquid-impermeable sheet, and the outer edges of the liquid-permeable sheet and the liquid-impermeable sheet were joined by heat sealing.
As a result of measuring the rigidity value of the obtained absorbent layer by [Measurement of rigidity value] described later, the width direction was 1.4 cN / cm and the longitudinal direction was 1.8 cN / cm.

[Example 2]
In the form shown in FIGS. 4A and 4B, an napkin as an evaluation sample was produced. The external shape of the napkin is the same as that of Example 1.
Liquid-permeable sheet (surface sheet): The same nonwoven fabric as in Example 1 was used with a width of 70 mm.
Side sheet: 18 g / m ² polypropylene SMS nonwoven fabric was used.
Liquid-impermeable sheet (back sheet): The same sheet as in Example 1 was used.
Absorbent sheet: The same sheet as in Example 1 was used.
Absorbent layer: after folding the above-mentioned absorbent sheet so that both ends thereof are opposed to each other at a substantially central portion on the upper surface side (liquid permeable sheet side) with a gap (G41 = 2 mm) (L40 = 110) W41 = 40 mm), the folded sheet is wrapped with another absorbent sheet (length L4 = 270 mm, width W4 = 75 mm, and the front and rear end portions have a predetermined curved shape), and both end portions are placed on the lower surface side (liquid-free). The absorbent layer was superposed on the transparent sheet side with a predetermined width (W42 = 5 mm) to form an absorbent layer (S40 = 45 mm, T4 = 2.4 mm).
Stabilization means: The absorbent layer is compressed from the outside of the liquid-impermeable sheet with an embossed roller having an elliptical columnar shape (major axis = 2 mm, minor axis = 1 mm) at predetermined intervals in the length direction, and is indented. (Depth 1.3 mm, dl54 = 12 mm, dw54 = 25 mm, d = 6.5 mm) was provided as a stabilizing means. In addition, the liquid permeable sheet side of the absorbent layer was slightly indented (FIG. 4A).
Napkin: The absorbent layer is disposed at a predetermined position between the liquid-permeable sheet and the liquid-impermeable sheet, and the side sheet is disposed so as to cover both sides of the liquid-permeable sheet. The liquid permeable sheet, the side sheet, and the liquid impermeable sheet were joined by heat sealing along the outer edge of the impermeable sheet, and the liquid permeable sheet and side sheet were joined by heat sealing.
The obtained absorbent layer had a rigidity value of 1.9 cN / cm at the center in the width direction, 1.6 cN / cm at the side embossed portion, and 2.0 cN / cm in the longitudinal direction.

Example 3
Example 1 with the exception of the embossing roller having the same protrusions as Example 1 in two rows, provided with a recess (depth 1.5 mm, dl54 = 6 mm, dw54 = 13 mm, d = 3 mm) as a stabilizing means. Similarly, an evaluation sample was produced. The rigidity value of the obtained absorbent layer was 1.7 cN / cm in the width direction and 1.7 cN / cm in the longitudinal direction.

[Comparative Example 1]
An evaluation sample was prepared in the same manner as in Example 1 except that no depression was provided and no stabilizing means was provided. The rigidity value of the obtained absorbent layer was 2.8 cN / cm in the width direction and 2.1 cN / cm in the longitudinal direction.

[Comparative Example 2]
An evaluation sample was produced in the same manner as in Example 2 except that no depression was provided and no stabilizing means was provided. The obtained absorbent layer had a rigidity value of 3.1 cN / cm in the width direction and 2.1 cN / cm in the longitudinal direction.

[Evaluation of wearing condition]
About the obtained napkin, using a transparent model made of a resin for mounting the napkin, the napkin is artificially mounted, and the shape of the napkin with respect to the crotch is visually observed from the upper part of the transparent model. Side fit was evaluated.

[Measurement of rigidity value]
For the measurement of the rigidity value, an automated pure bending tester (“KESFB2-AUTO-A” manufactured by Kato Tech Co., Ltd.) was used. Only the absorbent layer excluding the liquid-permeable sheet (front sheet) and the liquid-impermeable sheet (back sheet) was used as a sample. The sample was adjusted to a size of 30 mm × 30 mm around the site to be measured (specifically, individual stabilizing means). Since the chuck gap of the bending tester is 10 mm, at the time of measurement in the width direction, each stabilizing means was adjusted to be the center, and measurement was performed at each part N = 3. In the width direction measurement, the sample was attached to the testing machine so that the bending to the back sheet side was performed first, and in the longitudinal direction measurement, the sample was attached to the testing machine so that the bending to the top sheet side was performed first. . The measurement results are converted into data using dedicated software (KES-FB SYSTEM data measurement program Ver. 7.07WJ). In the width direction, the bending curvature is 2.0 (range from 1.98 to 2.02). The measured value on the back sheet side is defined as “stiffness value in the width direction”, and in the longitudinal direction, the measured value on the top sheet side at a bending curvature of 2.0 (range from 1.98 to 2.02) is defined as “longitudinal”. Direction stiffness value ”.

  As a result of the evaluation by the above-described evaluation method, the napkin of each of Example 1 and Example 2 has a shape that gently follows the crotch part of the transparent model, is not easily twisted, has excellent shape stability at the time of wearing, Good fit to the body on both sides. The napkin of Example 3 was slightly depressed at the center, and the center fit was slightly inferior to Examples 1 and 2, but the fit at both sides was good. On the other hand, the napkin of Comparative Example 1 had a large central depression and a large amount of warpage at the side. For this reason, the fit of the transparent model to the crotch was inferior and the mounting shape was poor.

It is a perspective view showing typically a 1st embodiment of an absorptive article of the present invention. It is a figure which shows typically the principal part of the absorptive layer of the absorbent article of 1st Embodiment, (a) is XX arrow sectional drawing in FIG. 1, (b) is from a non-skin contact surface side. It is a top view in the seen deployment state. Sectional drawing which shows typically the principal part of the absorbent layer of the absorbent article of 2nd Embodiment of the absorbent article of this invention. It is a figure which shows typically the principal part of the absorbent layer of the absorbent article of 3rd Embodiment of the absorbent article of this invention, (a) is sectional drawing (FIG. 2 (a) equivalent figure), (b). These are top views in the unfolded state seen from the non-skin contact surface side (FIG. 2B equivalent view). It is a figure which shows typically the center absorption part of the absorbent layer of the absorbent article of 4th Embodiment of the absorbent article of this invention, (a) is sectional drawing (FIG. 2 (a) equivalent figure), (b) ) Is a plan view (corresponding to FIG. 2B). (A) is sectional drawing (FIG. 2 (a) equivalent figure) which shows typically the center absorption part of the absorbent layer of the absorbent article of 5th Embodiment of the absorbent article of this invention, (b) is this invention. It is sectional drawing (FIG. 2 (a) equivalent view) which shows typically the principal part of the absorbent layer of the absorbent article of 6th Embodiment of this absorbent article.

Explanation of symbols

1 Sanitary napkin (absorbent article)
2 Skin contact surface 3 Non-skin contact surface 4 Absorbent layer 5 Means for stabilizing the mounting shape 54 Compression section (or thermal bonding section)

Claims (5)

An absorbent article comprising a top sheet that forms a skin contact surface, a back sheet that forms a non-skin contact surface, and an absorbent layer interposed between both sheets, and is formed substantially vertically. ,
The absorbent article has a portion having a large number of layers in a central region in the width direction, and has a means for stabilizing the mounting shape in the portion having the large number of layers.   The absorbent article according to claim 1, further comprising means for stabilizing the mounting shape at both side edge portions in a portion having a large number of layers of the absorbent layer.   The absorbent article according to claim 2, further comprising means for stabilizing the mounting shape at a central portion of the absorbent layer having a large number of layers.   The absorptive article according to any one of claims 1 to 3 in which said means for stabilizing a wearing shape consists of a compression part or a heat joined part provided discontinuously. The absorptive article according to claim 4 in which said compression part or said heat joined part is pressed and provided from said non-skin contact surface side of said absorptive layer.