JP2007289561A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article capable of improving visibility of a hot-melt part further in the absorbent article in which the hot-melt part whose color is brighter than that of the surface is formed on a skin-abutting side. <P>SOLUTION: The absorbent article 1 has an absorbent layer 2 formed of a fiber aggregate and a leak-proof layer provided on a non-skin-abutting side. On the skin-abutting side of the absorbent layer 2, a first melt part in which a plurality of recessed parts 4 are separated in a plane direction by melting composition fibers and a plurality of second melt parts 5 formed near a formation part of the recessed parts 4 by melting the composition fibers together are provided. The second melt part 5 has brighter color than that of the skin-abutting side of the absorbent layer 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to absorbent articles such as panty liners, sanitary napkins, and incontinence pads.

  In absorbent articles such as panty liners and sanitary napkins, heat-bonded parts (light colored parts) that are lighter (whitened) than the surrounding colors by embossing the skin contact surface side ) Is known (see, for example, Patent Document 1 below). Since such a heat-sealed part is brighter than its surroundings, for example, by designing its planar view shape, it is possible to attach a pattern with excellent visibility on the skin contact surface side, The design of the absorbent article can be improved.

Japanese Patent Laying-Open No. 2005-312695

  However, the heat-sealed part (light-colored part) may not be sufficiently light-colored depending on the type and thickness of the material for forming the skin contact surface, the embossing conditions, etc. It may be enough. Moreover, the further improvement of the visibility of a heat-fusion part is desired.

  Therefore, an object of the present invention is to further improve the visibility of the heat-sealed portion in the absorbent article in which the heat-sealed portion lighter than the color is formed on the skin contact surface side. It is to provide an absorbent article.

  The present invention is an absorbent article having an absorbent layer formed from a fiber assembly and a leak-proof layer disposed on the non-skin contact surface side of the absorbent layer, the skin contact surface of the absorbent layer On the side, the constituent fibers of the absorbent layer are fused together to fuse the constituent fibers of the absorbent layer with the first fused portion in which a large number of recesses are formed spaced apart in the plane direction. Accordingly, a plurality of second fusion parts formed in the vicinity of the formation part of the recesses are provided, and the second fusion parts are brighter than the color on the skin contact surface side of the absorbent layer. The above object is achieved by providing a colored absorbent article.

  According to the absorbent article of the present invention, on the skin contact surface side of the absorbent layer, skin contact is applied in an area where there are a large number of recesses due to the presence of a large number of recesses spaced apart in the plane direction forming the first fused portion. The tangent surface itself is recognized as a state close to a concave portion (perspective, color, etc.) in plan view. On the other hand, since the 2nd fusion | melting part is lightened rather than the color of the skin contact surface side, it stands up visually. Due to these synergistic effects, the visibility of the second fused portion is extremely high.

Hereinafter, an absorbent article of the present invention will be described based on a preferred embodiment thereof with reference to the drawings. FIG. 1 shows a schematic plan view of a panty liner 1 as an embodiment of the absorbent article of the present invention. FIG. 2 is a schematic longitudinal sectional view of the panty liner 1 shown in FIG.
The panty liner 1 of the present embodiment includes an absorbent layer 2 formed from a fiber assembly and a leak-proof layer 3 disposed on the non-skin contact surface side of the absorbent layer 2. The absorbent layer 2 is bonded to the leak-proof layer 3 via an adhesive (not shown) with its bottom face facing the leak-proof layer 3.

  On the skin contact surface side of the absorbent layer 2, a large number of concave portions 4 are formed in the plane direction so as to be separated by fusing constituent fibers of the absorbent layer 2 together. A first fusion part is constituted by the aggregate of the plurality of recesses 4. Since the concave portion 4 has a portion through which light is easily transmitted, which is formed by embossing, it is a dark color concave portion that is darker than the color on the skin contact surface side of the absorbent layer 2 in plan view. . Therefore, the first fused portion is darker than the color of the absorbent layer 2 on the skin contact surface side.

  Furthermore, the skin contact surface side of the absorbent layer 2 is flatter than the dark color concave portion 4 that is lighter than the color of the skin contact surface side of the absorbent layer 2 by fusing the constituent fibers of the absorbent layer 2 together. A plurality of second fused portions (hereinafter also referred to as “light color portions”) 5 having a large viewing area are formed. The light-colored portion 5 is formed in the vicinity of the formation portion of the concave portion 4 (region where a large number of concave portions 4 exist) in the first fused portion. The light-colored portion 5 is recessed in a concave shape by heat fusion and becomes a light-colored concave portion.

  If the absorption layer 2 is formed from a fiber assembly and can form the concave portion 4 and the light color portion 5 on the skin contact surface side, the configuration is not particularly limited. For example, a single layer structure or a laminated structure may be used. In order to stably form the concave portion 4 and the light-colored portion 5 on the skin contact surface side, the absorbent layer 2 is preferably sufficiently bulky. The thickness (bulk) of the absorption layer 2 is preferably 0.5 to 5 mm, more preferably 0.7 to 3 mm.

  Although it is possible to form the bulky absorbent layer 2 from a single-layer fiber assembly, it is generally difficult to produce a single-layer bulky fiber assembly and the production cost is high. Therefore, in order to obtain the bulky absorbent layer 2 easily and inexpensively, it is preferable to construct the absorbent layer 2 from a laminate in which a plurality of fiber sheets are laminated. The fiber sheet is a sheet made of a fiber assembly.

In the present embodiment, the absorbent layer 2 is composed of a laminate of two fiber sheets 21 and 22 from the viewpoints of manufacturing cost, ease of obtaining bulk, and the like. The fiber sheet constituting the skin contact surface side of the absorbent layer 2 is the first fiber sheet 21. The fiber sheet constituting the non-skin contact surface side of the absorbent layer 2 (side facing the leak-proof layer 3) is the second fiber sheet 22.
The thickness of each fiber sheet 21 and 22 is preferably 0.2 to 5 mm, more preferably 0.3 to 3 mm.

The constituent fiber of the absorbent layer 2 is not particularly limited, but a hydrophilic fiber is preferable.
Hydrophilic fibers include inherently hydrophilic fibers and inherently non-hydrophilic fibers that have been rendered hydrophilic by being subjected to a hydrophilization treatment.
Examples of the inherently hydrophilic fiber include pulp, rayon, and other various natural fibers, as well as water-absorbing resin fibers (that is, fibers made of crosslinked acrylic acid or acrylate polymer).

  As a method for hydrophilizing a fiber that does not inherently have hydrophilicity, a method commonly used in the technical field can be appropriately used. For example, a method in which a thermoplastic fiber typically used as a constituent fiber is subjected to surface treatment with a surfactant or the like in advance before forming a web to make it hydrophilic. Moreover, it is also possible to improve the hydrophilicity of the whole fiber assembly by mixing a hydrophilic fiber such as rayon or pulp fiber at a predetermined ratio to obtain a nonwoven fabric.

  (Dark color) The concave portion 4 and the light color portion 5 are formed by fusing the constituent fibers of the absorption layer 2 together. As specific means, for example, (1) heat passing through the absorption layer between a metal roll having a partially protruding portion on the peripheral surface and a receiving roll having a metal, rubber, fiber material or the like on the peripheral surface Examples include embossing and (2) ultrasonic embossing in which an absorption layer is passed between ultrasonic horns.

As will be described later, since the dark concave portion 4 is usually formed of a fiber in a film shape, ultrasonic embossing suitable for forming the fiber into a film shape is preferably used. As will be described later, since the light-colored portion 5 is usually formed by pressing a fiber within a range that is not substantially formed into a film, heat embossing suitable for such processing is preferably used.
When both the dark color concave portion 4 and the light color portion 5 are formed by hot embossing, the heat embossing may be performed by changing conditions such as embossing pressure, embossing heat amount, and fiber amount.

The lightness of the (dark color) concave portion 4 is preferably 30 to 65, more preferably 40 to 60 in terms of the L ^* a ^* b ^* color system (CIE1976) color coordinate index conversion L ^* value. When the converted L ^* value is less than 30, the entire absorption layer 2 is felt dark and the user's feeling tends to sink, and when the converted L ^* value exceeds 65, the effect of conspicuous the bright color portion 5 is reduced.
The brightness of the light color portion 5 is preferably 75 to 95, more preferably 80 to 90, as the converted L ^* value. When the converted L ^* value is 75 or less, there is no difference in brightness between the light-colored portion 5 and the skin contact surface of the absorbent layer 2, and when the converted L ^* value is 95 or more, glossiness appears. Therefore, it will not feel favorable.

The difference in the converted L ^* value between the multiple (dark color) concave portions 4 is preferably 1 to 20, and more preferably 2 to 10. If the difference in the converted L ^* value is smaller than 1, no difference in brightness is felt, and if the difference in the converted L ^* value is larger than 20, the entire absorbing layer 2 feels too dark.
The difference in the converted L ^* value between the plurality of light-colored portions 5 is preferably 2 to 20, more preferably 3 to 15, and still more preferably 3 to 8. If the difference in the converted L ^* value is smaller than 2, no difference in brightness is felt, and if the difference in the converted L ^* value is larger than 20, the glossiness appears, so that the absorbing layer 2 feels glaring, which is preferable. Absent.

The “L ^* a ^* b ^* color system” refers to a color system that has been standardized by the International Commission on Illumination (CIE) and also adopted by JIS (JIS Z8729).
In the “L ^* a ^* b ^* color system”, L ^* indicates brightness, a ^* and b ^* indicate color directions, a ^* is approximately red, −a ^* is approximately green, and b ^{* Indicates} a substantially yellow direction, and -b ^* indicates a substantially blue direction. These values are values obtained using a simple spectral color difference meter NF333 (trade name) manufactured by Nippon Denshoku Industries Co., Ltd.

  The measuring method using the simplified spectrocolor difference meter NF333 is as follows. A ND110 sensor of φ4 mm is attached in a stapler type, and an O-ring (small) is used at the tip of the sensor, and measurement is performed with a light source C / 2 and a viewing angle of 2 °. In the case of the stapler type, the target scope (measuring window φ9 mm) is attached so that the measurement position can be known in advance, so that the measurement position can be specified in four places around the target scope so that it can be specified by measuring the area ratio described later. Mark it.

The L ^* value is a value obtained by calculating the area coefficient (area ratio) of the (dark color) concave portion 4 and the light color portion 5 in the measurement region (circle having a radius of 2 mm) of the sensor using an image analysis device, The difference in the L ^* value is a value calculated from the difference in measured values. Here, for measurement of the area ratio, “NewQube” ver. Using an image analyzer of 4.21, after obtaining the area S ₀ of the measurement area of the sensor, (dark) the calculated area S ₁ of the recess 4 and the bright part 5, the area coefficient S ^* formula (S ^* = S ₁ / S ₀ ), an area coefficient S ^* is obtained, and a converted L ^* value is calculated by the following formula.
[Terms L ^* value] = [Skin L ^* value of the contact surface] + ([L ^* value] - [skin contact surface L ^* value]) × S ^*

The measurement of the L ^* value is preferably performed at a site where the area of the (dark color) concave portion 4 and the light color portion 5 is the largest in the measurement region of the sensor because it is easy to correlate with the impression received from the panty liner. .

  The dark color recessed part 4 is formed in the form in which the 1st fiber sheet 21 and the 2nd fiber sheet 22 of multiple sheets (2 sheets in this embodiment) are joined. The dark color recessed part 4 is a downward recessed part formed on the skin contact surface side of the absorbent layer 2 (skin contact surface side of the first fiber sheet 21) and the non-skin contact surface side of the absorbent layer 2 (second fiber sheet). 22 on the non-skin contact surface side). That is, the dark color recessed part 4 has the shape where both sides of the skin contact surface side and the non-skin contact surface side of the absorption layer 2 were recessed.

The light color portion 5 is formed only on the first fiber sheet 21. The light-colored portion 5 has a downward concave portion formed on the skin contact surface side of the first fiber sheet 21 and an upward surface formed on the non-skin contact surface side (second fiber sheet 22 side) of the first fiber sheet 21. And a recess.
In order to form the dark color concave portion 4 and the light color portion 5 having the cross-sectional shape shown in FIG. 2, for example, the first fiber sheet 21 is first embossed to form the light color portion 5, and then the light color portion 5. The first fiber sheet 21 and the second fiber sheet 22 on which are formed may be overlapped and embossed in that state to form the dark color recess 4.

In the present embodiment, as shown in FIG. 1, a large number of dark concave portions 4 are arranged in a staggered pattern in the plane direction on the absorption layer 2.
Plan view area of one dark recess 4 is preferably 0.03～20Mm ^2, more preferably 0.2 to 5 mm ^2. The plan view shape of the dark concave portion 4 is not particularly limited, and examples thereof include a circular shape, an elliptical shape, a rectangular shape, and other designed shapes. In this embodiment, it is circular.

The area ratio (%) per 1 cm ^{2 of the} dark color concave portion 4 is preferably 5 to 50%, more preferably 7 to 30%. In the present embodiment, the dark color recesses 4 are disposed over substantially the entire surface of the panty liner. However, in the present invention, if the dark color recesses 4 are disposed at least around the light color portions 5, the effect of making the light color portions 5 stand out. Is played. Therefore, the area ratio per 1 cm ² of the dark color concave portion 4 is a value around the bright color portion 5.

In the present embodiment, as shown in FIG. 1, a plurality of light color portions 5 are arranged in an irregular or regular pattern in the plane direction on the absorption layer 2.
The planar view area of one light color portion 5 is larger than the planar view area of the dark color concave portion 4, and is preferably larger by 0.2 to 70 mm ² , and more preferably 5 to 50 mm ² . The specific value of the planar view area of the light color portion 5 is preferably 3 to 75 mm ² , more preferably 5 to 50 mm ² .

The plan view shape of the light color portion 5 is not particularly limited, and examples thereof include a circle, an ellipse, a rectangle, and other designed shapes. In this embodiment, it is a floral pattern shape having four petals.
The planar visual density (pieces / cm ² ) of the light color portion 5 is preferably 1 to 20 pieces / cm ² , more preferably 3 to 15 pieces / cm ² .

  There are cases where a plurality of dark color recesses 4 and light color parts 5 are gathered to form one set design from the set. In the present embodiment, as shown in FIG. 1, in the bright color portion 5, four petals are gathered to form one floral design. In such a collective design, if individual design elements (in the present embodiment, petal shapes) are continuous in plan view, one dark color concave portion 4 or light colored portion 5 is obtained in the collective design. On the other hand, even if the design is recognized as a collective design, if each design element is separated in plan view, it is not regarded as one dark color recess 4 or light color part 5, and one design element is provided. The dark color concave portion 4 or the light color portion 5.

  The dark color recessed part 4 is normally formed when the constituent fiber 6 of the absorption layer 2 is made into a film shape. FIG. 3A and FIG. 3B schematically show longitudinal sectional views of the absorption layer 2. FIG. 3A schematically shows a state before the dark color recess 4 is formed. FIG. 3B schematically shows the state after the dark color recess 4 is formed.

  Before the dark concave portion 4 is formed, as shown in FIG. 3 (a), there are sufficient gaps between the constituent fibers 6 of the absorbent layer 2, and the constituent fibers 6 are not crushed and have a cross-sectional shape. Is maintained. After the formation of the dark color recess 4, as shown in FIG. 3B, the surface of the absorption layer 2 is depressed, and the gaps between the constituent fibers 6 of the absorption layer 2 are almost eliminated, and the cross-sectional shape of the constituent fibers 6 It is also crushed, the fiber shape disappears, and it becomes a film shape. Moreover, in the case of a fiber assembly having a laminated structure as in the present embodiment, the laminated structure is lost and is made into a single layer.

  Therefore, the dark color recessed part 4 becomes high in the transmittance | permeability of a light ray, and reflectivity falls. That is, as shown in FIG. 3B, most of the light ray R that has entered the dark color recess 4 is transmitted through the dark color recess 4 without being reflected by the dark color recess 4. Therefore, the lightness of the dark color recessed part 4 falls, and the dark color recessed part 4 is darkened rather than the color of the skin contact surface side of the absorption layer 2.

  In the dark color recessed part 4 in this embodiment, as shown in FIG. 2, it has the shape where the non-skin contact surface side of the absorption layer 2 was dented with the skin contact surface side of the absorption layer 2 as well. Thus, in the dark color recessed part 4 which has the shape where both upper and lower surfaces were dented, the light ray which permeate | transmitted the dark color recessed part 4 is easy to be scattered, and darkening is achieved further. In other words, the light beam that has once transmitted through the dark color recess 4 is reflected by the leak-proof layer 3, passes through the dark color recess 4 from the lower surface side, and returns to the upper surface side of the dark color recess 4. Thus, the return of the transmitted light is reduced by securing a sufficient distance (space) in which the transmitted light is scattered between the absorption layer 2 and the leak-proof layer 3.

As shown in FIG. 4, the vertical cross-sectional shape of the dark concave portion 4 can be a substantially truncated cone shape that narrows toward the bottom. The substantially frustoconical dark concave portion 4 may have a shape in which both sides of the skin contact surface side and the non-skin contact surface side of the absorbent layer 2 are recessed, or a shape in which only the skin contact surface side of the absorbent layer 2 is recessed. But you can.
Moreover, the longitudinal cross-sectional shape of the dark color recessed part 4 can be made into a hemispherical shape, as shown to Fig.5 (a). In the hemispherical dark color recess 4, the light transmitted through the dark color recess 4 is likely to diffuse due to the lens effect of the hemispherical dark color recess 4.
Further, as shown in FIG. 5B, the hemispherical dark color concave portion 4 can have a shape in which both sides on the skin contact surface side and the non-skin contact surface side of the absorbent layer 2 are recessed. If the hemispherical dark concave portion 4 is formed in this way, the scattered light scattering effect is further enhanced.

The basis weight of the absorbent layer 2 in the bright part 5, from the viewpoint of readily expressed lightening, preferably 15 to 50 g / m ^2, more preferably from 20 to 40 g / m ^2. The basis weight of the absorption layer 2 in the light color portion 5 is the basis weight when focusing only on the light color portion 5.

  The light-colored portion 5 is usually formed by being pressed in a range where the absorption layer 2 is not substantially formed into a film. FIG. 6A and FIG. 6B schematically show longitudinal sectional views of the absorption layer 2. FIG. 6A schematically shows a state before the bright color portion 5 is formed. FIG. 6B schematically shows the state after the bright color portion 5 is formed.

  Before the light color portion 5 is formed, as shown in FIG. 6 (a), there are sufficient gaps between the constituent fibers 6 of the absorption layer 2, the constituent fibers 6 are not crushed, and the cross section The shape is maintained. After the light color portion 5 is formed, as shown in FIG. 6B, the gaps between the constituent fibers 6 of the absorption layer 2 are greatly reduced, and the cross-sectional shape of the constituent fibers 6 is crushed and flattened. It is not in film form. In such a state, a layered structure is formed by the flattened constituent fibers 6, and a minute gap space is formed between the fibers (between the layered structures), so that irregular reflection of light easily occurs and whiteness increases. .

Thus, as a result of flattening the fiber in a range that does not become a film and increasing the planar view area, the light reflectivity in the bright color portion 5 is improved. That is, when the fiber is flattened, a minute uneven shape is formed on the surface of the bright color portion 5. The minute uneven shape has a height difference of about several μm and is formed by fibers that are flattened while leaving the fiber shape.
As a result, the light rays are irregularly reflected on the surface of the bright color portion 5. Specifically, as shown in FIG. 6B, the light ray R incident on the light color portion 5 is reflected by the air filling the gap between the constituent fibers 6 at the bottom of the light color portion 5. Since the positions of the gaps between the constituent fibers 6 are not regular, the reflected light rays R are irregularly reflected by the air filling the gaps, resulting in irregular reflection.

  The surface shape of the light color portion 5 may be a convex shape in the same direction as shown in FIG. 7A with respect to the concave direction, or a convex shape in the opposite direction as shown in FIG. However, a gently convex shape in the recessed direction as shown in FIG.

  As shown in FIG. 2, the non-skin contact surface side of the absorbent layer 2 is bonded to the skin contact surface side of the leak-proof wall 3 with an adhesive (not shown). From the viewpoint of facilitating the transfer of moisture from the absorbent layer 2 to the leak-proof layer 3, it is preferable that the adhesive is partially applied to the contact surface between the absorbent layer 2 and the leak-proof layer 3. The absorbent layer 2 and the leak-proof layer 3 are preferably in close contact with each other in a region where no adhesive is applied.

  As the leak-proof layer 3, a sheet commonly used in absorbent articles can be used without particular limitation as long as it is a liquid-impermeable or liquid-impermeable sheet, and preferably has moisture permeability. . The leak-proof layer 3 is, for example, a moisture permeable film alone, a laminate of a film and a nonwoven fabric, a water-repellent nonwoven fabric [SMS (spunbond-meltblown-spunbond), SMMS (spunbond-meltblown-meltblown-spunbond), etc.] Can be used.

  The light color portion 5 may be partially film-shaped. Specifically, as shown in FIG. 8, the light color portion 5 is formed in a shape in which a lightened region 51 surrounds a non-lightened region 52. In addition, in the lightened area 51, there is an area 53 (film-formed area) that is partially made into a film. Although one film forming region 53 is illustrated for one light color portion 5 in FIG. 8, there are usually a large number of film forming regions 53 for one light color portion 5.

  The filmed region 53 and the non-lightened region 52 are substantially surrounded by the lightened region 51, and the areas 51 of the two regions 52 and 53 are lightened. When the area is less than 20% of the total area (when the total is less than 40% at the maximum), the user recognizes all these areas 51 to 53 as the lightened areas, so that all these areas are It can be regarded as a lightened area.

  Moreover, in the dark color recessed part 4, although a slightly light color area | region may be formed in the circumference | surroundings of a film-like part or the inside of a film-like part, in this case, since a user feels the whole as a dark color recessed part, The whole can be regarded as a dark color recess. In addition, when the periphery of the dark color recessed part 4 is surrounded by the light color area | region, the effect which becomes easy to recognize the dark color recessed part 4 as a dark color is show | played.

The film-forming region 53 usually extends in the orientation direction of the constituent fibers of the fiber assembly of the absorbent layer 2. The film-forming region 53 is generated due to a variation in microscopic basis weight of the constituent fibers in the light color portion 5. Such a variation in basis weight is due to the presence of a portion that is strongly bonded to the constituent fibers in the light-colored portion 5 and a portion that is weakly bonded.
If there is no strongly bonded portion such as the film formation region 53, the light color portion 5 is difficult to maintain.

  In the panty liner 1 of the present embodiment, the skin contact surface itself is seen in a plan view in a region where there are a large number of recesses 4 due to the presence of a large number of recesses 4 that are spaced apart in the plane direction forming the first fusion part ( Perception and color are recognized as being close to the recess. On the other hand, since the bright color part 5 is lighter than the color on the skin contact surface side, it stands out visually. Due to these synergistic effects, the visibility of the light color portion 5 is extremely high.

  In addition, a large number of dark concave portions 4 that are darker than the color on the skin contact surface side of the absorbent layer 2 are formed apart from each other in the plane direction, and more than the color on the skin contact surface side of the absorbent layer 2. A plurality of light-colored portions 5 that are lighter and have a larger planar view area than the dark-colored recesses 4 are formed. For this reason, the light color portion 5 is more clearly emphasized on the skin contact surface side of the absorbent layer 2 due to the presence of the dark color concave portion 4 that is darker than that color.

  By the way, the light color part 5 may exist over the some dark color recessed part 4, as shown in FIG. It is preferable to have such a configuration because the leak-proof property is improved. That is, since the dark color concave portion 4 is formed into a film, the leakage preventing effect is high, but on the other hand, the rigidity is increased. Therefore, in order to secure the flexibility of the entire absorbent article, the plan view of the dark color concave portion 4 is obtained. It is not preferable to make the density too high. However, as shown in FIG. 9, when the light color portion 5 exists across the plurality of dark color concave portions 4, the skin contact surface is also formed between the dark color concave portions 4 due to the presence of the light color portion 5 straddling them. Since the liquid diffusion on the side can be suppressed, leakage prevention is improved.

The absorbent article of the present invention is not limited to the above embodiment, and can be variously modified without departing from the spirit of the present invention.
The recessed part 4 and the 2nd melt | fusion part 5 can be formed in the shape dented downward only in the skin contact surface side of the absorption layer 2. As shown in FIG. The second fusion part 5 may be formed across a plurality of fiber sheets.
There is no restriction | limiting in the arrangement pattern of the planar direction of the recessed part 4 and the 2nd melt | fusion part 5. FIG.
The absorbent article of the present invention can also be applied to side pads, breast milk pads, light incontinence pads and the like.

FIG. 1 is a schematic plan view showing a panty liner which is an embodiment of the absorbent article of the present invention. FIG. 2 is a schematic longitudinal sectional view of the panty liner shown in FIG. 3A and 3B are schematic longitudinal sectional views of the absorption layer, in which FIG. 3A is a diagram showing a state before the formation of dark concave portions, and FIG. 3B is a diagram showing a state after the formation of dark concave portions. FIG. 4 is a schematic longitudinal sectional view showing a dark concave portion having another shape. FIG. 5A and FIG. 5B are schematic longitudinal sectional views showing dark concave portions having still different shapes. 6A and 6B are schematic longitudinal sectional views of the absorption layer, in which FIG. 6A is a diagram showing a state before the formation of the bright color portion, and FIG. 6B is a diagram showing a state after the formation of the bright color portion. FIG. 7A and FIG. 7B are schematic longitudinal sectional views showing light color portions having different shapes. FIG. 8 is a schematic plan view showing a light color portion in another form. FIG. 9 is a schematic plan view showing a light color portion of still another embodiment.

Explanation of symbols

1 Panty liner (absorbent article)
2 Absorption layer 21 1st fiber sheet 22 2nd fiber sheet 3 Leak-proof layer 4 (dark color) Concave part 5 Light color part (2nd fusion part)
6 Constituent fibers

Claims (6)

An absorbent article having an absorbent layer formed from a fiber assembly and a leak-proof layer disposed on the non-skin contact surface side of the absorbent layer,
On the skin contact surface side of the absorbent layer, a first fusion part in which a plurality of recesses are formed spaced apart in the plane direction by fusing constituent fibers of the absorbent layer, and the absorbent layer A plurality of second fusion parts formed near the formation part of the recess by fusing the constituent fibers of
The absorbent article in which the second fusion part is lighter than the color of the absorbent layer on the skin contact surface side.   The first fusion part is darker than the color on the skin contact surface side of the absorbent layer, and the second fusion part is larger than the planar view area of each of the first fusion parts. The absorbent article according to claim 1.   The said absorption layer consists of a laminated body of a plurality of fiber sheets, and the said recessed part in a said 1st melt | fusion part is formed in the form where a plurality of this fiber sheet is joined. Absorbent articles.   The said recessed part in a said 1st melt | fusion part has the shape where the both sides of the skin contact surface side and the non-skin contact surface side of the said absorption layer were dented. Absorbent article. The absorbent article according to claim 1 wherein the basis weight of the absorbent layer is 15 to 50 g / m ² in the second fused portion.   The absorbent article according to any one of claims 1 to 5, wherein the second fusion part exists across the plurality of first fusion parts.

Images