JP2021137194A - Absorbent article - Google Patents

Abstract

To provide an absorbent article capable of coping with both improvement of visibility of a pattern and suppression of damage or peeling of a layer showing the pattern, in an absorbent article having the pattern.SOLUTION: An absorbent article 1 includes an exterior member 20 constituting the exterior. The exterior member includes, on a surface on a non-skin side, a recess recessed toward a skin side, and a protrusion positioned around the recess. A display layer 50 showing a pattern, and formed of a material different from the exterior member, is provided on the surface on the non-skin side in the recess.SELECTED DRAWING: Figure 2

Description

The present invention relates to absorbent articles.

Absorbent articles with patterns such as letters, figures, symbols and colors or combinations thereof on the outer surface are known. As such an absorbent article, for example, Patent Document 1 discloses a disposable diaper having a printed pattern. The disposable diaper is provided with a pattern printing layer showing a printing pattern. According to Patent Document 1, the pattern printing layer is clear because it is formed on a smooth base printing layer formed on a non-woven fabric having large irregularities on the surface.

Japanese Unexamined Patent Publication No. 2005-103933

In the disposable diaper of Patent Document 1, a pattern printing layer showing a printed pattern (pattern) is located on the outermost surface of the disposable diaper. Therefore, it can be said that the visibility of the pattern is high. However, on the other hand, the pattern printing layer located on the outermost surface of the disposable diaper is likely to be rubbed against external devices and members during the manufacture and use of the disposable diaper. That is, the pattern printing layer may be damaged or peeled off by being rubbed against an external device or member. If the pattern printing layer is damaged or peeled off, it becomes difficult to visually recognize the pattern on the pattern printing layer.

An object of the present invention is to provide an absorbent article having a pattern, which can achieve both improvement of visibility of the pattern and suppression of damage and peeling of a layer showing the pattern. ..

The absorbent articles of the present invention are as follows. (1) An absorbent article including an exterior member constituting the exterior, wherein the exterior member has a concave portion concave toward the skin side and a convex portion located around the concave portion on the surface on the non-skin side. An absorbent article comprising, and comprising a pattern-indicating display layer formed of a material different from the exterior member on the non-skin side surface of the recess.

According to the present invention, it is possible to provide an absorbent article having a pattern, which can improve the visibility of the pattern and suppress damage and peeling of the layer showing the pattern at the same time. ..

It is a top view which shows the structural example of the absorbent article which concerns on embodiment. It is a bottom view which shows the structural example of the absorbent article which concerns on embodiment. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. It is a schematic diagram which shows the use example of the absorbent article which concerns on embodiment. It is sectional drawing which shows the structural example of the display layer which concerns on embodiment. It is sectional drawing which shows the other structural example of the display layer which concerns on embodiment. It is sectional drawing which shows the other structural example of the display layer which concerns on embodiment. It is sectional drawing which shows the other structural example of the absorbent article which concerns on embodiment. It is sectional drawing which shows the other structural example of the absorbent article which concerns on embodiment. It is sectional drawing which shows the other structural example of the absorbent article which concerns on embodiment. It is a top view which shows the structural example of the absorbent article which concerns on another embodiment. It is a partially enlarged bottom view which shows the structural example of the absorbent article which concerns on another embodiment. It is a partially enlarged bottom view which shows the structural example of the absorbent article which concerns on another embodiment.

The present embodiment relates to the following aspects.
[Aspect 1] An absorbent article including an exterior member constituting an exterior, wherein the exterior member has a concave portion on the surface on the non-skin side, a concave portion toward the skin side, and a convex portion located around the concave portion. An absorbent article comprising, and, on the surface of the recess on the non-skin side, provided with a display layer showing a pattern, which is formed of a material different from the exterior member.
In this absorbent article, the display layer is arranged on the non-skin side surface of the exterior member, but is arranged in a recess that is recessed on the skin side of the surrounding convex portion. Therefore, it is possible to reduce the possibility that the display layer is rubbed against an external device or member during the manufacture or use of the absorbent article. As a result, damage or peeling of the display layer can be suppressed. Here, when the display layer is arranged in the recess, it may be difficult to see from the outside. Therefore, in the present absorbent article, the display layer is formed of a material different from the exterior member. Therefore, the pattern of the display layer can be clearly recognized by the difference between the material of the display layer and the material of the exterior member. That is, the visibility of the pattern can be improved. As described above, in the present absorbent article, it is possible to achieve both improvement of the visibility of the pattern and suppression of damage and peeling of the layer showing the pattern.

[Aspect 2] The absorbent article according to Aspect 1, wherein the display layer is not arranged on the convex portion.
In this absorbent article, the display layer does not protrude into the convex portion that easily comes into contact with an external device or member. Therefore, the possibility that the display layer is rubbed against an external device or member during the manufacture or use of the absorbent article can be further reduced, and thus damage or peeling of the display layer can be further suppressed.

[Aspect 3] The concave portion includes a main portion located at the center of the concave portion and an edge portion located at the outer edge of the main portion and in contact with the convex portion in a plan view, and the display layer is the display layer. The absorbent article according to aspect 1 or 2, which is located at the main part and not at the front edge.
In this absorbent article, the display layer is not formed on the edge portion that easily comes into contact with an external device or member, but is formed on the main portion inside the edge portion. Therefore, the possibility that the display layer is rubbed against an external device or member during the manufacture or use of the absorbent article can be further reduced, and thus damage or peeling of the display layer can be further suppressed.

[Aspect 4] The concave portion includes a main portion located at the center of the concave portion and an edge portion located at the outer edge of the main portion and in contact with the convex portion in a plan view, and the display layer is the display layer. The absorbent article according to aspect 1 or 2, which is located at the main part and the front edge part.
In this absorbent article, the display layer is formed not only on the main part of the recess but also on the edge part. Here, since the edge portion is located at the boundary between the concave portion and the convex portion, the height position on the concave portion side of the edge portion is higher than the height position on the main portion side of the edge portion. That is, the surface of the edge portion is inclined with respect to the surface of the main portion to form an inclined surface. Therefore, the reflection direction of the light incident on the display layer can be made different between the main portion and the edge portion. Further, when the edge portion surrounds the main portion, the inclined surface faces in various directions depending on the position of the edge portion with respect to the main portion. In that case, the reflection direction of the light incident on the display layer can be directed in various directions depending on the position of the edge portion. By forming the display layer also at the edge portion in this way, the display layer can be visually recognized from various directions, and the visibility of the display layer can be improved.

[Aspect 5] The absorbent article according to any one of aspects 1 to 4, wherein the height of the display layer with respect to the surface of the concave portion on the non-skin side is lower than the height of the convex portion.
In this absorbent article, the height of the display layer is lower than the height of the protrusions. Therefore, the possibility that the display layer is rubbed against an external device or member during the manufacture or use of the absorbent article can be further reduced, and thus damage or peeling of the display layer can be further suppressed.

[Aspect 6] The absorbent article according to any one of aspects 1 to 5, wherein the display layer has irregularities on the surface on the non-skin side.
In this absorbent article, the display layer has irregularities on the non-skin side surface. Therefore, the light incident on the display layer can be reflected by the display layer in various directions, so that the display layer can be visually recognized from various directions.

[Aspect 7] The absorbent article according to any one of aspects 1 to 6, wherein the other material contains an ink and / or a foil containing a metal component.
In this absorbent article, another material includes an ink and / or foil containing a metallic component. As a result, the display layer can be imparted with gloss due to the metal component, and the visibility of the pattern can be further enhanced.

[Aspect 8] Any one of aspects 1 to 7, wherein the display layer is arranged in a region overlapping the absorbent body of the absorbent article in the thickness direction or a non-stretchable region of the absorbent article. Absorbent article described in.
In this absorbent article, the display layer is arranged in a region that overlaps the absorber in the thickness direction or a non-stretchable region of the absorbent article. That is, the display layer is arranged in a region with high flatness. Thereby, the visibility of the display layer can be further improved.

[Aspect 9] The absorbent article according to any one of aspects 1 to 8, wherein the absorbent article is a disposable diaper, and the display layer is arranged in a waist circumference region of the disposable diaper.
In this absorbent article, the display layer is located in the girth area of the disposable diaper. That is, the display layer is arranged in an area that is easier to see than other areas. Thereby, the visibility of the display layer can be further improved.

[Aspect 10] The absorbent article according to aspect 9, wherein the display layer is arranged in the central portion of the waist circumference region.
In this absorbent article, the display layer is located in the center of the girth region. That is, the display layer is arranged in an area that is easier to see than other areas. Thereby, the visibility of the display layer can be further improved. Further, the display layer is arranged in a portion that is hard to come into contact with a device at the time of manufacturing or a human hand at the time of wearing. Thereby, the possibility that the display layer is rubbed by a device or a hand during the manufacture or use of the absorbent article can be further reduced, and therefore damage or peeling of the display layer can be further suppressed.

[Aspect 11] The absorbent article according to any one of aspects 1 to 10, wherein the disposable diaper is a tape-type diaper, and the display layer is arranged in a target tape area of the tape-type diaper.
In this absorbent article, the display layer is located in the target tape area. As a result, the target tape area can be easily visually recognized when the tape-type diaper is attached. Further, since the display layer is formed in the concave portion, damage or peeling of the display layer can be suppressed even when the hooks bonded to the target tape region are repeatedly attached and detached in the vicinity of the display layer.

[Aspect 12] The absorbent article according to any one of aspects 1 to 11, wherein the disposable diaper is a tape-type diaper, and the display layer is arranged in a side flap region of the tape-type diaper.
In this absorbent article, the display layer is located in the side flap area. As a result, the side flap area can be easily visually recognized when the tape-type diaper is attached.

[Aspect 13] The absorbent article according to any one of aspects 1 to 12, wherein the display layer is arranged in a foothold portion of the absorbent article.
In this absorbent article, the display layer is arranged in the underfoot portion. The underfoot portion is a portion located around the foot that moves violently, and may rub against surrounding objects that may come into contact with the wearer's movement. However, in this absorbent article, since the display layer is arranged in the recess with another material, it is possible to make it difficult to rub against surrounding objects that may come into contact with the movement of the wearer. As a result, damage or peeling of the display layer can be suppressed.

[Aspect 14] The absorbent article according to any one of aspects 1 to 13, wherein the display layer is arranged in the crotch portion of the absorbent article.
In this absorbent article, the display layer is located in the crotch area. The crotch portion is a portion in contact with the garment worn on the outside of the absorbent article, and may rub against the garment as the wearer moves. However, in this absorbent article, since the display layer is arranged in the recess with another material, it can be made less likely to rub against the clothes as the wearer moves. As a result, damage or peeling of the display layer can be suppressed.

Hereinafter, the absorbent article according to the embodiment will be described. However, in the first embodiment, the tape-type diaper will be described as an example of the absorbent article, and in the second embodiment, the pants-type diaper will be described as an example of the absorbent article. The type of the absorbent article is not limited to this example, and other absorbent articles may be used as long as they do not deviate from the scope of the present invention. Other absorbent articles include sanitary napkins, incontinence pads and the like.

(First Embodiment)
1 to 3 are diagrams showing a configuration example of the tape-type diaper 1 according to the embodiment. FIG. 1 is a plan view showing a state in which the tape-type diaper 1 is unfolded, FIG. 2 is a bottom view (viewed from the non-skin side), and FIG. 3 is a cross section taken along the line III-III of FIG. It is a figure. FIG. 4 is a schematic view showing a usage example of the tape-type diaper 1 according to the embodiment.

In the state shown in FIG. 1, the tape-type diaper 1 has a longitudinal direction L, a width direction W, and a thickness direction T that are orthogonal to each other, and has a longitudinal center line CL extending through the center of the width direction W and extending in the longitudinal direction L. It has a width direction center line CW that passes through the center of the longitudinal direction L and extends in the width direction W. The direction and side toward the center line CL in the longitudinal direction are defined as the inward and inside of the width direction W, respectively, and the direction and side away from it are defined as the outward and outside of the width direction W, respectively. The direction and side approaching the center line CW in the width direction are defined as the inward and inside sides of the longitudinal direction L, respectively, and the direction and side away from the center line CW are defined as the outward direction and outside of the longitudinal direction L, respectively. Further, in the longitudinal direction L, the side of the tape-type diaper 1 facing the ventral edge is also referred to as the front side of the longitudinal direction L, and the side of the tape-type diaper 1 facing the dorsal edge is also referred to as the rear side of the longitudinal direction L. say. "Plane view" means viewing the tape-type diaper 1 unfolded in a plane including the longitudinal direction L and the width direction W from the upper side in the thickness direction T, and "planar shape" is grasped in a plan view. The shape of the diaper. The "planar direction" is an arbitrary direction parallel to the plane including the width direction W and the longitudinal direction L. The “skin side” and the “non-skin side” mean the side relatively close to the wearer's skin surface and the side far from the wearer's skin surface in the thickness direction T when the tape-type diaper 1 is worn by the wearer. These definitions are commonly used not only for the tape-type diaper 1 and the pants-type diaper 1a described later, but also for each material arranged therein. It should be noted that "a member, a structure, a shape, etc." is "along the longitudinal direction L" not only when the member or the like is parallel to the longitudinal direction L, but also when the component Dx in the longitudinal direction L of the member or the like is the width direction W of the member or the like. It also includes cases where it is larger than the component Dy of. Similarly, "along the width direction W" means that the member or the like is not only when the member or the like is parallel to the width direction W, but also when the component Dy in the width direction W of the member or the like is the component Dx in the longitudinal direction L of the member or the like. Including cases larger than. When a curved or curved member or the like is said to be "along the longitudinal direction L" or "along the width direction W", the components Dx and Dy at the tangents of the points on the curved surface and the like are evaluated as described above.

As shown in FIG. 1, the tape-type diapers 1 are arranged along the longitudinal direction L, with the ventral side 2 located on the front side, the dorsal side 3 located on the rear side, and the ventral side 2 and the dorsal side. It has (is divided into) a crotch portion 4 located between the portions 3. The ventral side 2 is a portion that comes into contact with the wearer's abdomen. The dorsal side portion 3 is a portion that comes into contact with the back portion of the wearer. The crotch portion 4 is a portion that comes into contact with the wearer's crotch. In the tape-type diaper 1, for example, the anterior 1/3 region in the longitudinal direction L is the ventral side 2, the posterior 1/3 region is the dorsal portion 3, and the central 1/3 is the crotch portion 4. be able to. Each of the ventral portion 2 and the dorsal portion 3 has a region extending outward from the crotch portion 4 in the width direction W, that is, a pair of side flap regions 3F and 3F. In the present embodiment, the crotch portion 4 is enclosed inside the crotch portion W, and each of the ventral side portion 2 and the dorsal side portion 3 extends outward from the crotch portion 4 in the width direction W. By doing so, a pair of side flap regions 3F and 3F are formed. The crotch portion 4 does not have to be constricted inside in the width direction W, and in that case, the pair of side flap regions 3F and 3F are formed of a member different from the absorbent main body 10.

The tape-type diaper 1 includes an absorbent main body 10, a pair of engaging tapes 7a and 7b, and a target tape 18 (18a and 18b). The absorbent body 10 includes the absorbent body 14, and in the present embodiment, the absorbent body 10 is located in the range from the ventral side 2 to the dorsal side 3 via the crotch 4 in the longitudinal direction L, and is located in the width direction W. , Located in the range up to both ends. On the non-skin side, the pair of engaging tapes 7a and 7b are located at both ends on the outer side of the dorsal side 3 in the width direction W, that is, on the side flap region 3F, and extend outward from both ends. In this embodiment, at least one of the pair of engaging tapes 7a and 7b and the pair of side flap regions 3F and 3F is expandable and contractible. The target tape 18 is located at the center of the ventral side 2 in the width direction W on the non-skin side, and extends in the width direction W. In the present embodiment, the region where the target tape 18 is located, that is, the target tape region AA, is the central portion AC located at the center, one side portion AEa located on both sides of the central portion AC, and the other in the width direction W. It has a side portion AEb and. The target tape 18 includes a first tape portion 18a located on one side portion AEa and a second tape portion 18b located on the other side portion AEb. In the present embodiment, the first tape portion 18a and the second tape portion 18b are separated from each other in the width direction W. The central portion AC of the target tape region AA overlaps the absorber 14 in a plan view and is a non-stretchable region. Examples of the pair of engaging tapes 7a and 7b include fastening tapes and hooks of hook-and-loop fasteners. Correspondingly, examples of the target tape 18 include a non-woven fabric and a loop of a hook-and-loop fastener. The engaging tape 7 and the side flap region 3F do not have to expand and contract.

In the tape-type diaper 1, for example, after the dorsal portion 3 is in contact with the back of the wearer and the ventral portion 2 is in contact with the abdomen, as shown in FIG. 4, a pair of dorsal portions 3 are engaged. The combined tapes 7a and 7b are attached to the wearer by engaging the first tape portion 18a and the second tape portion 18b of the target tape 18 on the ventral side portion 2. At this time, the dorsal side portion 3 and the ventral side portion 2 surround the waist circumference of the wearer, thus forming a waist circumference region. Since the target tape region AA (target tape 18) is located at the center of the ventral side 2 in the width direction W, it is located at the center of the waist circumference region when viewed from the front of the wearer. Further, the waist opening through which the wearer's waist passes is defined by the outer end portion 2e of the ventral side portion 2 in the longitudinal direction L and the outer end portion 3e of the dorsal side portion 3 in the longitudinal direction L. At the same time, a pair of leg openings through which the wearer's legs pass are defined by the side portions 5e and 5e on both sides of the crotch portion 4 in the width direction W. The side portions 5e and 5e on both sides of the crotch portion 4 in the width direction W surrounding the pair of leg openings constitute a pair of underfoot portions AP and AP of the tape-type diaper 1.

In the present embodiment, the absorbent body 10 is located between the liquid-permeable front sheet 12, the liquid-impermeable back sheet 13, and the front sheet 12 and the back sheet 13, and absorbs and holds the liquid. It contains the absorber 14. Examples of the surface sheet 12 include a liquid-permeable non-woven fabric and woven fabric, a synthetic resin film having liquid-permeable holes formed therein, and a composite sheet thereof. Examples of the back sheet 13 include a liquid-impermeable non-woven fabric, a synthetic resin film, and a composite sheet thereof. The absorber 14 includes an absorption core 14a that absorbs and retains the liquid, and a liquid-permeable upper core wrap 14b and a lower core wrap 14c that cover the absorption core 14a. The absorber 14, the front surface sheet 12 and the back surface sheet 13 are respectively bonded by an adhesive, and the front surface sheet 12 and the back surface sheet 13 are bonded by an adhesive at their peripheral edges. Examples of the adhesive include materials known for tape-type diapers, such as hot melt adhesives. The shape of the absorbent body 10 is not particularly limited, and the shape used for the absorbent body 10 of a known tape-type diaper can be adopted. The absorber 14 does not have to have a core wrap.

In the present embodiment, the absorbent body 10 includes a pair of side sheets 17, 17 located on both sides in the width direction W and extending in the longitudinal direction L on the surface on the skin side. Each side sheet 17 has a fixing portion 15, a leak-proof wall 16, and a fixing portion 15 along the longitudinal direction L inside the width direction W. The fixing portions 15 and 15 are located at the front and rear end portions of the side seat 17 in the longitudinal direction L, and are fixed to the absorbent main body 10. The leak-proof wall 16 is located between the fixing portions 15 and 15 on the front side and the rear side in the longitudinal direction L of the side sheet 17, and the outer edge in the width direction W is fixed to the absorbent body 10 and the width direction W. The inner edge of the is non-fixed. Each leak-proof wall 16 includes two elastic members 61 extending along the longitudinal direction L at the inner end in the width direction W. The elastic member 61 is exemplified by a rubber thread. Each side sheet 17, 17 is formed of a hydrophobic sheet such as a hydrophobic non-woven fabric.

In the present embodiment, the tape-type diaper 1 is provided with a liquid-impermeable exterior sheet 5 on the non-skin side of the back sheet 13. The exterior sheet 5 and the back sheet 13 are laminated in the thickness direction T and joined to each other with an adhesive or the like. The peripheral edge portion of the exterior sheet 5 and the peripheral edge portions of the pair of side sheets 17 and 17 are laminated in the thickness direction T and joined to each other with an adhesive or the like. The back surface sheet 13 may be omitted, and the peripheral portions of the absorber 14 and the front surface sheet 12 may be joined to the exterior sheet 5. Examples of the exterior sheet 5 include any liquid-impermeable sheet such as a liquid-impermeable non-woven fabric, a synthetic resin film, a composite sheet thereof, a spunbonded non-woven fabric, and an SMS non-woven fabric. Examples of the material of the exterior sheet 5 include polyolefin-based materials such as polypropylene and polyethylene. The basis weight of the exterior sheet 5 is, for example, 5 to 100 g / m ² , preferably 10 to 50 g / m ² . The dimension (thickness) of the exterior sheet 5 in the thickness direction T is, for example, 0.1 to 5 mm, preferably 0.1 to 2 mm. The exterior sheet 5 may be a laminated body of two or more sheets. The exterior sheet 5 may be omitted, and the peripheral portions of the pair of side sheets 17 and 17 may be joined to the peripheral portions of the back surface sheet 13.

In the present embodiment, the absorbent main body 10 further includes a telescopic member 6 on the back side portion 3. The telescopic member 6 is a sheet-like member that can be expanded and contracted in the width direction W, and is arranged so as to straddle the longitudinal center line CL at the center of the dorsal side portion 3 in the width direction W. The elastic member 6 is arranged, for example, between the pair of engaging tapes 7 and 7 in the width direction W. The telescopic member 6 functions as a waist gather, for example. Further, the tape-type diaper 1 is provided with a plurality of elastic members 8 for leg gathers from the crotch portion 4, the dorsal side portion 3 and the ventral side portion 2. The plurality of elastic members 8 are extended along the longitudinal direction L mainly at both ends of the crotch portion 4 in the width direction W between the pair of side seats 17 and 17 and the exterior seat 5. The elastic member 8 expands and contracts the leg opening, and is exemplified by a rubber thread.

The tape-type diaper 1 further includes a display layer 50 showing a pattern, which is made of a material different from the base material 20. In the present embodiment, the display layer 50 is arranged on the non-skin side surface of the base material 20. The base material 20 is arranged in the target tape region AA of the exterior sheet 5. The display layer 50 is arranged on the non-skin side surface of the central portion AC of the base material 20, and the first tape portion 18a and the first tape portion 18a and the first tape portion 18a and the first tape portion 18a are arranged on the non-skin side surface of one side portion AEa and the other side portion AEb of the base material 20. Two tape portions 18b are arranged. The display layer 50 may be arranged directly on the exterior sheet 5 without using the base material 20.

The display layer 50 is a layer showing characters, figures, symbols and colors, or a pattern that is a combination thereof. In this embodiment, a heart shape or a smiley mark is used as the pattern. However, there are no particular restrictions on the type of pattern, that is, the type of each of letters, figures, symbols and colors, or the type of combination thereof, and the letters include, for example, alphabets, Arabic letters, non-erographs, Roman numerals, kanji, and hiragana. , Katakana, or special characters. Examples of the figure include a circle, an ellipse, a polygon, a plant shape, an animal shape, an article shape, a character design, a national flag, a coat of arms, and the like. Examples of the symbol include a map symbol, a clef symbol, a guide map symbol (pictogram), a sign, and the like. The color is predetermined with respect to, for example, a color having a metallic luster such as gold or silver, a color exhibiting a predetermined luster, or a color around the display layer 50 (example: base material 20 or exterior sheet 5). Examples include colors having a color difference of. A color having a metallic luster or a color showing a predetermined luster has high visibility because it is easy to see even in a dark place. A color having a predetermined color difference with respect to the color around the display layer 50 has high visibility because it is highly distinguishable from the material around the display layer 50. The number of patterns included in the display layer 50 is arbitrary. The size of one pattern is not particularly limited, but for example, the length of one side of the smallest rectangle (consisting of sides parallel to the longitudinal direction L and the width direction W) that can include one pattern is set. 1 to 100 mm can be mentioned.

The pattern of the display layer 50 may be divided into a plurality of portions in the longitudinal direction L in a plan view. For example, the pattern of the display layer 50 is divided into two portions in the longitudinal direction L. However, when the pattern is divided into two parts in the longitudinal direction L, the pattern has a front side portion and a rear side portion in the longitudinal direction L, and thus the front side portion and the rear side portion are in the longitudinal direction L. It means having an unbound region that is not bound to (no pattern). As described above, the pattern of the display layer 50 is divided into a plurality of portions in the longitudinal direction L in a plan view, so that the tape-type diaper 1 is easily broken in the non-bonding region between the portions. As a result, the display layer 50 tends to bend in the non-bonding region along the roundness of the wearer's abdomen. As a result, the display layer 50 can easily follow the line and movement of the wearer's body, is less likely to receive an extra load, and is less likely to be peeled off.

The pattern of the display layer 50 may be divided into a plurality of portions in the width direction W in a plan view. For example, the pattern of the display layer 50 is divided into two portions in the width direction W. However, when the pattern is divided into two parts in the long width direction W, the pattern has a right side part and a left side part in the width direction W, so that the right side part and the left side part are in the width direction W. It means having a non-bonded region (without a pattern) that is not bound. As described above, the pattern of the display layer 50 is divided into a plurality of portions in the width direction W in a plan view, so that the tape-type diaper 1 is easily broken in the non-bonding region between the portions. As a result, the display layer 50 tends to bend in the non-bonding region along the roundness of the wearer's abdomen. As a result, the display layer 50 can easily follow the line and movement of the wearer's body, is less likely to receive an extra load, and is less likely to be peeled off.

In the pattern of the display layer 50, when the pattern is divided into three equal area areas in the width direction W, the maximum dimension A in the longitudinal direction L in the central region is the maximum dimension B in the longitudinal direction L in both regions. Is formed to be larger than (A> B). In other words, in the pattern of the display layer 50, it can be said that the central region portion is large and the side region portions are small. However, in the method of dividing the pattern into three equal parts, first, the smallest rectangle that can contain the pattern (composed of sides parallel to the longitudinal direction L and the width direction W) is determined, and then the rectangle is divided into the width direction W. It is divided into three equal area areas. As a result, when the tape-type diaper 1 is attached, the visibility of the pattern can be improved by enlarging the pattern in the central region of the pattern corresponding to the central portion in the width direction W, which is difficult to touch, and it is easy to touch. By making the pattern smaller in the regions on both sides of the pattern corresponding to both sides of the width direction W, it is possible to prevent the pattern from peeling off. Further, in the tape type diaper 1, when a pair of engaging tapes are engaged with the target tape in the waist circumference region, the pattern is enlarged in the central region of the pattern corresponding to the central portion in the width direction W which is difficult to engage. By reducing the size of the pattern in the regions on both sides of the pattern corresponding to both sides of the width direction W where the pattern is easily engaged, it is possible to prevent the pattern from peeling off.

The tape-type diaper 1 may be provided with a display layer at another position on the surface on the non-skin side. In the present embodiment, for example, the pair of engaging tapes 7a and 7b are provided with display layers 52a and 52b. In this case, the base material 20 may or may not be arranged between the pair of engaging tapes 7a and 7b and the display layers 52a and 52b. When not arranged, the pair of engaging tapes 7a and 7b also function as the base material 20 by incorporating the structure of the base material 20. In this case, each of the pair of engaging tapes 7a and 7b is located on the outermost side of the tape-type diaper 1 at the time of use (see FIG. 4) and constitutes a part of the exterior of the tape-type diaper 1. Therefore, it can be said to be one of the exterior members.

Next, the display layer 50 will be further described with reference to FIGS. 2 to 5. However, FIG. 5 is a cross-sectional view showing a configuration example of the display layer 50 according to the embodiment, and is a cross-sectional view showing the vicinity of the display layer 50 of FIG. 3 partially enlarged and turned upside down. The same applies to the configurations of the other display layers 52a and 52b.

In the present embodiment, as described above, the display layer 50 is located on the non-skin side surface of the base material 20. The base material 20 includes a concave portion 22 that is concave toward the skin side and a convex portion 21 that is located around the concave portion 22 on the surface 20S1 on the non-skin side, and the surface 20S1 on the non-skin side in the concave portion 22. A display layer 50 formed of a material different from that of the base material 20 is provided. In this case, the base material 20 is located on the surface 5S1 on the non-skin side of the exterior sheet 5, and forms a part of the exterior of the tape-type diaper 1, so that it can be said to be one of the exterior members.

The recess 22 is not a recess due to surface irregularities inherent in the base material 20, for example, a recess on the surface due to fiber unevenness when the base material 20 is a non-woven fabric, but has a size slightly larger than that of the display layer 50 in the plane direction. It is a concave portion formed on the surface of the base material 20.

In the plane direction, that is, in the longitudinal direction L and the width direction W, the length of the recess 22 is more than 100% of the length of the display layer 50 in the longitudinal direction L and the width direction W from the viewpoint of accommodating the display layer 50 in the recess 22. Yes, preferably 104% or more, more preferably 108% or more. Further, the lengths of the longitudinal direction L and the width direction W in the recess 22 are 140% or less of the lengths of the display layer 50 in the longitudinal direction L and the width direction W, preferably 140% or less, from the viewpoint of making it difficult for the display layer 50 to be peeled off. It is 130% or less, more preferably 120% or less. For example, when the size of the width direction W of the display layer 50 is about 20 mm, the size of the width direction W of the recess 22 is, for example, about 22 mm. The convex portion 21 is a region surrounding the concave portion 22 thereof, and is a region of the base material 20 excluding the concave portion 22.

In the thickness direction T, the height (thickness) d11 of the convex portion 21 from the bottom surface (surface 20S2 on the skin side) of the base material 20 is the same as the thickness of the base material 20. Further, in the thickness direction T, the height (thickness) d12 of the recess 22 from the bottom surface (surface 20S2 on the skin side) of the base material 20 is smaller than the thickness d11 of the base material 20 (d12 <d11). However, the height (thickness) d12 of the recess 22 is preferably 60% or less, more preferably 40% or less, and further 20% or less of the height (thickness) d11 from the viewpoint of making the display layer 50 more difficult to peel off. preferable. Further, the height (thickness) d12 of the recess 22 is preferably 2% or more of the height (thickness) d11, preferably 4% or more, from the viewpoint of suppressing the recess 22 from becoming too hard and deteriorating the wearing feeling. More preferably, 8% or more is further preferable. However, the (thickness) d11 of the base material 20 is not particularly limited, and examples thereof include 0.1 to 2 mm, from the viewpoint of facilitating the formation of recesses (lower limit) and the viewpoint of making the recesses less likely to be too deep (upper limit). ) To 0.2 to 1 mm is preferable.

For example, when the base material 20 is made of synthetic fibers, the recesses 22 are compressed while heating the region where the recesses 22 are to be formed, so that the fibers are fused to each other and the shape at the time of compression is changed. It can be formed by being largely maintained after compression. At that time, by fusing the fibers together, the unevenness of the surface due to the unevenness of the fibers on the surface 20S1 on the non-skin side of the recess 22 can be suppressed to a certain extent. As a result, the unevenness of the surface 50S2 on the skin side of the display layer 50 can be suppressed to a certain range, and the unevenness of the surface 50S1 on the non-skin side can be suppressed to a certain range, so that the pattern can be easily seen.

As described above, in the tape-type diaper 1, the display layer 50 is arranged on the non-skin side surface (example: surface 20S1) of the exterior member (example: base material 20), but is more than the surrounding convex portion 21. It is arranged in a recess 22 recessed on the skin side. Therefore, it is possible to reduce the possibility that the display layer 50 is rubbed against an external device or member during the manufacture or use of the tape-type diaper 1. As a result, damage or peeling of the display layer 50 can be suppressed. Here, when the display layer 50 is arranged in the recess 22, it may be difficult to see from the outside. Therefore, in the tape-type diaper 1, the display layer 50 is made of a material different from that of the exterior member. Therefore, the pattern of the display layer 50 can be clearly recognized due to the difference between the material of the display layer 50 and the material of the exterior member. That is, the visibility of the pattern can be improved. As described above, in the tape-type diaper 1, it is possible to achieve both improvement of the visibility of the pattern and suppression of damage and peeling of the layer showing the pattern.

Further, in the tape-type diaper 1, since the display layer 50 is made of a material different from that of the base material 20, the visibility of the display layer 50 is enhanced. Therefore, for example, by knowing the meaning of the pattern displayed on the package or the like in advance, the meaning indicated by the pattern can be easily grasped when the tape-type diaper 1 is replaced. As a specific example, when the pattern of the display layer 50 indicates the position of the ventral side 2 (front side) / dorsal side 3 (rear side), the ventral side 2 (front side) / dorsal side 3 of the tape type diaper 1 The position of (rear side) can be easily grasped. Further, when the pattern of the display layer 50 indicates the front side (skin side) / back side (non-skin side) of the tape-type diaper 1, the front side (skin side) / back side (non-skin side) of the tape-type diaper 1 can be easily grasped. can. Further, when the pattern of the display layer 50 indicates the size, the size of the tape-type diaper 1 can be easily grasped. Therefore, the tape-type diaper 1 can be easily replaced without any error. The pattern indicates the front side, the skin side, etc., and the size, for example, when the pattern has characters, shapes, and patterns set in advance to indicate the front side, the skin side, and the size. In the present embodiment, the display layer 50 shows the target tape area AA, which is the area where the target tape 18 is arranged. Therefore, the position of the target tape 18 of the tape-type diaper 1 can be easily recognized. Thereby, the pair of engaging tapes 7a and 7b can be easily engaged with the first and second tape portions 18a and 18b of the target tape 18. Then, it is possible to avoid a trouble of engaging the pair of engaging tapes 7a and 7b with a portion other than the target tape 18. Further, since the display layer 50 is formed in the recess 22, even when the pair of engaging tapes 7a and 7b hooks coupled to the target tape region AA are repeatedly attached and detached in the vicinity of the display layer 50, the display layer 50 of the display layer 50 is attached and detached. Damage and peeling can be suppressed.

In the present embodiment, the concave portion 22 includes a main portion 25 located at the center (planar direction) of the concave portion 22 and an edge portion 26 located at the outer edge of the main portion 25 and in contact with the convex portion 21 in a plan view. I'm out. The display layer 50 is arranged on the main portion 25 and not on the edge portion 26.

However, since the edge portion 26 is located at the boundary between the concave portion 22 and the convex portion 21, the height position of the edge portion 26 on the convex portion 21 side is higher than the height position of the edge portion 26 on the main portion 25 side. .. That is, the surface of the edge portion 26 is inclined with respect to the surface of the main portion 25 to form an inclined surface. The size of the edge portion 26 in the width direction W or the longitudinal direction L is not particularly limited, and examples thereof include 0.05 to 3 mm, from the viewpoint of making it difficult for the edge of the display layer 50 to be caught by other objects (lower limit). From the viewpoint of maintaining the effect of forming a recess (upper limit), 0.1 to 1.5 mm is preferable.

As described above, in the preferred embodiment of the present embodiment, in the tape-type diaper 1, the display layer 50 is not formed on the edge portion 26 which easily comes into contact with an external device or member, and the main portion 25 inside the edge portion 26 is not formed. Is formed in. Therefore, the possibility that the display layer 50 is rubbed against an external device or member during the manufacture or use of the tape-type diaper 1 can be further reduced, and thus damage or peeling of the display layer 50 can be further suppressed.

In the present embodiment, in the thickness direction T, the height (thickness) d2 of the display layer 50 with respect to the non-skin side surface 20S1 of the concave portion 22 is the height (thickness) d2 of the convex portion 21 with respect to the non-skin side surface 20S1 of the concave portion 22. (Thickness) is lower than (d11-d12) (d2 <(d11-d12)). That is, in the thickness direction T, the difference Δ of the height position of the non-skin side surface 50S1 of the display layer 50 with respect to the height position of the non-skin side surface 20S1 of the convex portion 21 is Δ = (d11-d12) −. d2> 0. However, the height (thickness) d2 of the display layer 50 is preferably 90% or less, more preferably 80% or less of the height (thickness) (d11-d12) from the viewpoint of making the display layer 50 more difficult to peel off. , 70% or less is more preferable. Further, the height (thickness) d2 of the display layer 50 is preferably 2% or more of the height (thickness) (d11-d12) from the viewpoint of suppressing the display layer 50 from being too low to be difficult to see. 4% or more is more preferable, and 8% or more is further preferable. However, if the above conditions are satisfied, the height (thickness) d2 of the display layer 50 is not particularly limited, and for example, 0.001 to 1.0 mm can be mentioned, from the viewpoint of enhancing visibility (lower limit) and peeling. From the viewpoint of making it difficult (upper limit), 0.01 to 0.5 mm is preferable.

As described above, in the preferred embodiment of the present embodiment, in the tape-type diaper 1, the height d2 of the display layer 50 with respect to the surface 20S1 on the non-skin side of the concave portion 22 is larger than the height (d11-d12) of the convex portion 21. Low. Therefore, the possibility that the display layer 50 is rubbed against an external device or member during the manufacture or use of the tape-type diaper 1 can be further reduced, and thus damage or peeling of the display layer 50 can be further suppressed.

In this embodiment, the display layer 50 is not arranged on the convex portion 21. In other words, the display layer 50 is not arranged on the surface of the base material 20 having the highest height position from the surface 20S2 on the skin side in the thickness direction T.

As described above, in the preferred embodiment of the present embodiment, in the tape-type diaper 1, the display layer 50 does not protrude into the convex portion 21 that easily comes into contact with an external device or member, but remains in the concave portion 22. Therefore, the possibility that the display layer 50 is rubbed against an external device or member during the manufacture or use of the tape-type diaper 1 can be further reduced, and thus damage or peeling of the display layer 50 can be further suppressed.

In a preferred embodiment of the present embodiment, in the tape-type diaper 1, the display layer 50 preferably has a high glossiness from the viewpoint of improving visibility. The high glossiness is, for example, 7 or more, preferably 10 or more, more preferably 20 or more, and further preferably 30 or more. If the glossiness is too low, the visibility becomes low, and it becomes difficult to visually recognize the pattern of the display layer 50, particularly in an environment where the brightness is not sufficient.

In this case, the color of the display layer 50 is not particularly limited as long as it can exhibit the above glossiness, but from the viewpoint of easily obtaining the above glossiness, a color exhibiting metallic luster, for example, gold or silver, is preferable. Gold is particularly preferable. If it has a golden luster, it can be given a more luxurious feel. However, it is not necessary to realize gold or silver with gold or silver, and other materials may be used to realize a pseudo gold or silver tint. Examples of the color capable of achieving metallic luster showing a predetermined luster or the color showing a predetermined luster include 800 series (C) and 8000 series (C) in the colors of Metallic Coated CHIPS of PANTONE (registered trademark). A color region in the 10000s (C) can be mentioned.

Examples of another material that can form such a display layer 50 include a foil containing a metal component and a paint (ink) containing a metal component. The foil is a thin, flat layer containing metallic components. The foil is, for example, one in which a metal is struck and spread thinly and flatly, one in which a synthetic resin layer or the like is laminated on a thinly flattened metal, and one in which a synthetic resin layer or the like is laminated on a layered material containing metal. And so on. The layered material containing a metal is, for example, a metal powder pigment-containing coating film or a metal vapor deposition film. Examples of the paint (ink) include those containing a pigment or dye exhibiting metallic luster such as a metal powder pigment as a coating film forming component. In the material containing these metals, examples of the metal used for luster include gold, silver, copper, tin, brass, and aluminum.

Here, the display layer 50 is preferably formed of foil. Such foils have a certain shape and thickness as compared to liquid materials such as paints. Therefore, the display layer 50 can be formed relatively smoothly with a desired thickness without being affected by the unevenness and voids of the base on which the foil is formed, and the glossiness of the display layer 50 can be easily maintained at a desired value. The thickness of the display layer 50 (foil) is 1 to 1000 μm, preferably 10 to 500 μm. If the thickness of the display layer 50 is too thin, it will be affected by the unevenness of the base and the gloss cannot be maintained, and if it is too thick, the tactile sensation will be hard and the wearer or the like will feel uncomfortable.

The display layer 50 is not limited to the above example, and may not necessarily be a foil or paint containing a metal as long as it has high visibility (example: if it can exhibit a predetermined glossiness). Examples of the display layer 50 include a film using a paint containing a glossy pigment (example: a coating film containing a pearl pigment), a hologram, and the like.

Further, the color of the display layer 50 may be a color having a predetermined color difference ΔE with respect to the color of the surrounding material. Here, the predetermined color difference ΔE is, for example, 1 or more, preferably 2 or more, more preferably 3 or more, and further preferably 5 or more. When the color of the display layer 50 has a predetermined color difference ΔE with respect to the color of the surrounding material, the display layer 50 can be easily identified with respect to the material around the display layer 50, for example, the base material 20 and the exterior sheet 5. , Visibility can be improved.

Here, examples of the base material 20 include non-woven fabrics such as spunbonded non-woven fabrics, air-through non-woven fabrics, and SMS non-woven fabrics. The material of the non-woven fabric is not particularly limited, and examples thereof include synthetic resins such as polyethylene, polypropylene, and polyethylene terephthalate. In that case, the thickness of the non-woven fabric is, for example, 0.02 to 2 mm, preferably 0.05 to 1 mm. If it is too thin, the material of the display layer 50 can easily come off the non-woven fabric, making it difficult to form the display layer 50. If it is too thick, the display layer 50 may protrude too much from the surface of the product.

Here, when a non-woven fabric is used as the base material 20, the non-woven fabric may include a film (not shown) laminated on the surface opposite to the display layer 50. The material of the film is not particularly limited, and examples thereof include synthetic resins. In that case, the smoothness of the display layer 50 can be further suppressed from being affected by the unevenness of the base material below the base material 20. Therefore, the display layer 50 can be evenly bonded onto the non-woven fabric to improve visibility and prevent it from peeling off. Further, since the thickness of the base material 20 is increased by the amount of the laminated film, pressure is likely to be applied between the foil and the base material 20 during the foil pressing process for the display layer 50, and the foil is used as the base material. It becomes easy to be placed on 20.

Here, when a non-woven fabric is used as the base material 20, the non-woven fabric may be heat-compressed (pressed). In that case, the smoothness of the base material 20 can be improved by heat-sealing and thermocompression-bonding the fibers of the non-woven fabric. Therefore, the smoothness of the display layer 50 can be further suppressed from being affected by the unevenness of the base material below the base material 20. Therefore, the display layer 50 can be evenly bonded onto the non-woven fabric to improve visibility and prevent it from peeling off. Further, when the base material 20 is smoothed by a hot press or the like (including the case where the base material 20 is originally smooth), the entire display layer 50 including the display layer 50 becomes very smooth, so that it is tactile. The display layer 50 can be confirmed more easily.

Here, when a non-woven fabric is used as the base material 20, a base coat layer (not shown) may be further provided between the non-woven fabric and the display layer 50. In that case, the surface of the non-woven fabric is covered with the base coat, and the smoothness of the base material 20 can be improved. Therefore, the smoothness of the display layer 50 can be further suppressed from being affected by the unevenness of the base material below the base material 20. Therefore, the visibility of the display layer 50 can be improved and it can be made difficult to peel off.

Here, when a non-woven fabric is used as the base material 20, a top coat layer (not shown) may be further provided on the display layer 50 on the non-woven fabric. In that case, since the top coat layer is provided on the display layer 50, deformation of the display layer 50 can be suppressed, and unevenness and wrinkles can be less likely to be formed. Therefore, since the smoothness of the surface of the display layer 50 is maintained, the visibility of the display layer 50 can be improved and the top coat layer can prevent the display layer 50 from peeling off.

The configuration of the display layer 50 is not limited to the above example, and if it is possible to improve the visibility of the pattern of the display layer 50 and suppress damage or peeling of the display layer 50, the following Other configuration examples as illustrated in the above may be used.

FIG. 6 is a cross-sectional view showing another configuration example of the display layer 50 according to the embodiment, and is a cross-sectional view showing the vicinity of the display layer 50 of FIG. 3 partially enlarged and turned upside down.

In another configuration example, the recess 22 includes a main portion 25 located at the center of the recess 22 and an edge portion 26 located at the outer edge of the main portion 25 and in contact with the convex portion 21 in a plan view. .. The display layer 50 is arranged on the main portion 25 and the edge portion 26. Further, in the present embodiment, the display layer 50 is not arranged on the convex portion 21.

As described above, in the tape-type diaper 1 in another aspect of the present embodiment, the display layer 50 is formed not only on the main portion 25 of the recess 22 but also on the edge portion 26. Here, the surface of the edge portion 26 is inclined with respect to the surface of the main portion 25 to form an inclined surface. Therefore, the reflection direction of the light incident on the display layer 50 can be made different between the main portion 25 and the edge portion 26. Further, when the edge portion 26 surrounds the main portion 25, the inclined surface faces in various directions depending on the position of the edge portion 26 with respect to the main portion 25. In that case, the reflection direction of the light incident on the display layer 50 can be directed in various directions depending on the position of the edge portion 26. By forming the display layer 50 also on the edge portion 26 in this way, the display layer 50 can be visually recognized from various directions, and the visibility of the display layer 50 can be improved.

FIG. 7 is a cross-sectional view showing still another configuration example of the display layer 50 according to the embodiment, and is a cross-sectional view showing the vicinity of the display layer 50 of FIG. 3 partially enlarged and turned upside down.

In still another configuration example, the display layer 50 has irregularities on the surface 50S1 on the non-skin side in the thickness direction T. Since the size of the unevenness exists on the surface of the concave portion 22 formed by compression of the fiber via the display layer 50, it is approximately the same as the unevenness on the surface of the concave portion 22, but the unevenness of the display layer 50 itself. Is also included. The degree of the unevenness is as follows: (height to the top of the convex portion with respect to the skin side surface 50S2 of the display layer 50 + d12) <(to the bottom of the concave portion with respect to the skin side surface 50S2 of the display layer 50). Height + d12) × 2. However, d12 is the height (thickness) of the recess 22 from the bottom surface (skin side surface 20S2) of the base material 20 as described above. The difference in thickness direction T between the top of the convex portion and the bottom of the concave portion is 40 to 200 μm. The distance between the top of the convex portion and the bottom of the concave portion in the longitudinal direction L and / or the width direction W is 50 to 500 μm.

As described above, in the tape-type diaper 1 in another aspect of the present embodiment, the display layer 50 has irregularities on the surface 50S1 on the non-skin side. Therefore, the light incident on the display layer 50 can be reflected by the display layer 50 on the surface 50S1 in various directions. As a result, the display layer 50 can be visually recognized from various directions, and the visibility can be enhanced.

The configuration of the base material 20 and the display layer 50 is not limited to the above example, and it is possible to improve the visibility of the pattern of the display layer 50 and suppress damage and peeling of the display layer 50 at the same time. If so, other configurations may be used, as illustrated below.

FIG. 8 is a cross-sectional view showing another configuration example of the tape-type diaper 1 according to the embodiment. The tape-type diaper 1 has a base material 20 present only on the lower side of the display layer 50 and not on the lower side of the first tape portion 18a and the second tape portion 18b. Is different from. In this tape-type diaper 1, the display layer 50 is supported by the base material 20. Therefore, the smoothness of the display layer 50 can be suppressed from being affected by the unevenness of the layer below the base material 20, and the visibility of the display layer 50 can be maintained. Further, the display layer 50 is located at a position higher than the first tape portion 18a and the second tape portion 18b by the base material 20, and protrudes appropriately. As a result, the display layer 50 can be easily visually recognized when the tape-type diaper 1 is used.

FIG. 9 is a cross-sectional view showing another configuration example of the tape-type diaper 1 according to the embodiment. This tape-type diaper 1 differs from the tape-type diaper 1 of FIG. 3 in that the central portion of the target tape 18 in the width direction W functions as the base material 20 and the display layer 50 is arranged at the central portion thereof. In this case, the target tape 18 includes a concave portion 22 and a convex portion 21 (not shown), and is preferably a non-woven fabric. In this tape-type diaper 1, the display layer 50 is supported by the target tape 18. Therefore, the smoothness of the display layer 50 can be suppressed from being affected by the unevenness of the layer below the target tape 18, and the visibility of the display layer 50 can be maintained. Further, by forming the display layer 50 on the target tape 18, a wider area can be secured for engagement. Thereby, the engagement between the target tape 18 and the pair of engaging tapes 7a and 7b can be further stabilized.

FIG. 10 is a cross-sectional view showing another configuration example of the tape-type diaper 1 according to the embodiment. In the tape-type diaper 1, the portion of the exterior sheet 5 between the first tape portion 18a and the second tape portion 18b functions as the base material 20, and the display layer 50 is arranged in that portion. It is different from the tape type diaper 1 of. In this case, the exterior sheet 5 is provided with a concave portion 22 and a convex portion 21 (not shown), and is preferably a non-woven fabric. In this tape-type diaper 1, the display layer 50 is supported by the exterior sheet 5. Therefore, the smoothness of the display layer 50 can be suppressed from being affected by the unevenness of the layer below the exterior sheet 5, and the visibility of the display layer 50 can be maintained. When there is no exterior sheet 5 and the back sheet 13 constitutes the non-skin side surface of the tape-type diaper 1, the back sheet 13 includes a concave portion 22 and a convex portion 21 (not shown). ), It is preferable that it is a non-woven fabric. The portion of the back sheet 13 between the first tape portion 18a and the second tape portion 18b functions as the base material 20.

In a preferred embodiment of the present embodiment, the display layer 50 is arranged in a region that overlaps the absorber 14 of the tape-type diaper 1 in the thickness direction T, or a non-stretchable region of the tape-type diaper 1. That is, the display layer 50 is arranged in a region having high flatness. Thereby, the visibility of the display layer 50 can be further improved.

In a preferred embodiment of the present embodiment, the display layer 50 is arranged in the girth region of the tape-type diaper 1. That is, the display layer 50 is arranged in an area that is easier to see than other areas. Thereby, the visibility of the display layer 50 can be further improved.

In a preferred embodiment of the present embodiment, the display layer 50 is arranged in the central portion of the waist circumference region. That is, the display layer 50 is arranged in an area that is easier to see than other areas. Thereby, the visibility of the display layer 50 can be further improved. Further, the display layer 50 is arranged not at an end portion that easily comes into contact with a device at the time of manufacture or a human hand at the time of wearing, but at a central portion that is difficult to contact. As a result, the possibility that the display layer 50 is rubbed by a device or a hand during the manufacture or use of the tape-type diaper 1 can be further reduced, and thereby damage or peeling of the display layer 50 can be further suppressed.

As another preferred embodiment in the present embodiment, a pair of display layers 53, 53 may be provided in the pair of foothold portions AP, the region of the AP. The configuration of each of the pair of display layers 53 and 53 is the same as the configuration of the display layer 50. It is not necessary to arrange the base material 20 between the pair of foothold portions AP, AP and the pair of display layers 53, 53. In that case, the pair of foothold portions AP and the exterior sheet 5 (exterior member) forming at least a part of the AP also functions as the base material 20 by incorporating the structure of the base material 20 (see FIG. 10). In this case, the foot grip portion AP is a portion located around the foot that moves violently, and may rub against surrounding objects that may come into contact with the wearer's movement. However, in this tape-type diaper 1, since the display layer 50 is arranged in the recess 22 with another material, it is possible to make it difficult to rub against surrounding objects that may come into contact with the movement of the wearer. As a result, damage or peeling of the display layer 50 can be suppressed.

As another preferred embodiment of the present embodiment, the display layer 54 may be provided on the dorsal or ventral side of the longitudinal direction L in the central region of the crotch portion 4 in the width direction W. The configuration of the display layer 54 is the same as the configuration of the display layer 50. The base material 20 does not have to be arranged between the crotch portion 4 and the display layer 54. In that case, the exterior sheet 5 (exterior member) forming at least a part of the crotch portion 4 also functions as the base material 20 by incorporating the structure of the base material 20 (see FIG. 10). In this case, the crotch portion 4 is a portion that comes into contact with the clothes worn on the outside of the tape-type diaper 1, and may rub against the clothes as the wearer moves. However, in the tape-type diaper 1, since the display layer 50 is arranged in the recess 22 with another material, it can be made less likely to rub against the clothes as the wearer moves. As a result, damage or peeling of the display layer 50 can be suppressed.

As another preferred embodiment of the present embodiment, the display layers 55 and 55 may be provided on the pair of side flap regions 3F and 3F. The configuration of the display layer 55 is the same as the configuration of the display layer 50. It is not necessary to arrange the base material 20 between the pair of side flap regions 3F and 3F and the display layers 55 and 55. In that case, the exterior sheet 5 (exterior member) forming at least a part of the pair of side flap regions 3F and 3F also functions as the base material 20 by incorporating the structure of the base material 20 (see FIG. 10). In this case, when the tape-type diaper 1 is attached, the pair of side flap areas 3F and 3F can be easily visually recognized.

As described above, the tape-type diaper 1 includes at least one of the display layers 50, 52a, 52b, 53, 54, and 55. Each of the display layers 50, 52a, 52b, 53, 54, 55 may have the same pattern as each other, may have different patterns from each other, and may or may not have the same pattern. May be mixed.

Next, a method of forming the display layer 50 in the method of manufacturing the tape-type diaper 1 will be described.
The method for forming the display layer 50 is not particularly limited as long as the predetermined display layer 50 can be formed. Examples of the forming method include (1) a step of preparing a sheet member for the base material 20, and (2) a step of arranging a material for the display layer 50 (example: foil, paint) on the surface of the sheet member. The sheet member includes a step of cutting out a portion of the sheet member on which the display layer 50 is arranged, and (4) a step of arranging the cut-out portion on a predetermined base sheet member.

However, examples of the sheet member for the base material 20 prepared in the above step (1) include a sheet member for the base material 20 (example: in the case of FIGS. 3 and 8) and a sheet member for the target tape 18. Example: In the case of FIG. 9, a sheet member for the engaging tape 7 (Example: In the case of FIG. 2), a sheet member for the exterior sheet 5 (Example: in the case of FIG. 10), a sheet member for the back surface sheet 13, and the like. Examples include heat-pressed sheet members. Here, when the sheet member for the base material 20 is the sheet member for the base material 20, the base sheet member in the above step (4) is for the exterior sheet 5, the back surface sheet 13, the engaging tape 7, or the target tape 18. It is a seat member for. When the sheet member for the base material 20 is the sheet member for the target tape 18, the base sheet member in the step (4) above is a sheet member for the exterior sheet 5 or the back surface sheet 13. When the sheet member for the base material 20 is a sheet member for the engaging tape 7, the exterior sheet 5, or the back sheet 13, the steps (3) and (4) above for forming the display layer 50 are unnecessary. be.

Among the methods for manufacturing the tape-type diaper 1 (the method for forming the display layer 50 in the above), the step (2) above includes a smoothing step and a forming step. In the smoothing step, the concave portion 22 is formed in the sheet member while smoothing the surface of the sheet member for the surface on the non-skin side (eg, the sheet member for the base material 20). In the forming step, a display layer having a pattern (example: display layer 50) is formed on the surface of the smoothed sheet member.

Here, the smoothing step includes a heat treatment step of heating the sheet member and a compression step of compressing the sheet member. (Heat press). Examples of the heat treatment step include a step of passing a sheet member between a pair of heating rolls. The temperature of the heating roll is preferably equal to or higher than the softening point of the material of the sheet member and lower than the melting point. Specifically, although it depends on the material of the seat member, for example, 80 to 180 ° C. is mentioned, and 90 to 150 ° C. is preferable. The heating time is, for example, 0.01 to 2 seconds, preferably 0.05 to 0.1 seconds. Examples of the compression step include a step of passing a sheet member between a pair of pressure rolls. Examples of the pressure of the pressure roll include 0.1 to 5 MPa, preferably 0.3 to 3 MPa. The pressurization time is, for example, 0.01 to 2 seconds, preferably 0.05 to 0.1 seconds. However, the heat treatment step and the pressure step may be performed at the same time. In that case, for example, a step of passing the sheet member between a pair of rolls that can be heated and pressurized can be mentioned. The roll temperature, roll pressure, heating or pressurizing time are as described above. However, at least one of the pair of pressure rolls has a convex portion on the peripheral surface of the roll that projects in the radial direction of the roll and can press the region where the recess 22 is to be formed in the seat member. As a result, the recess 22 can be formed in the sheet member by the compression step. The "softening point" and "melting point" are the "endothermic start temperatures" when measuring the endothermic behavior that changes from solid to liquid at a temperature rise rate of 10 ° C./min, respectively, with a differential scanning calorimeter. And "peak top temperature".

The smoothing step can improve the smoothness of the sheet member and form the recess 22. As an index of the smoothness of the sheet member, for example, the density of the sheet member can be used. This is because in a sheet member such as a non-woven fabric, as the density increases, the fibers come close to each other to reduce surface irregularities, and thus smoothing progresses. The density of the sheet member after the smoothing step is preferably about twice or more the density before the smoothing step, for example, 0.05 to 2 g / cm ³ , preferably 0.1 to 1.0 g. / Cm ³ is more preferable.

On the other hand, the forming step is a foil pressing step in which a foil containing a metal having a pattern is thermocompression bonded to the surface of the smoothed sheet member, or a pattern is formed on the surface of the smoothed sheet member with a paint containing a metal. Includes a printing process, which prints.

The foil pressing step is a method of forming the display layer 50 by pressing a foil (example: metal leaf) into the recess 22 of the sheet member formed by the compression step by heat and pressure and thermocompression bonding. The foil stamping method is preferable because it is a dry method that can easily express a metallic color (metallic luster) on a transfer material and does not use a solvent, unlike ordinary printing. When the foil pressing step is used as the forming step, the smoothing step is not always necessary because of the characteristics of the foil, which has a constant shape and thickness and is not easily affected by the smoothness of the base. In that case, by adjusting the temperature and pressure of the foil pressing process, the recess 22 can be formed in the sheet member and the display layer 50 can be formed.

The printing step is a method of forming the display layer 50 in the recess 22 of the sheet member formed by the compression step with a paint (ink) containing a metal component. The printing method is not particularly limited, and examples thereof include pad printing, gravure printing, flexographic printing, screen printing, inkjet printing, and printing. In the printing step, the pattern is printed in the recess 22 of the sheet member formed by the compression step, and the display layer 50 is formed. Pad printing is preferable as the printing method. Since printing is performed with an elastic silicon pad, it is possible to print on uneven surfaces such as the surface of non-woven fabric, and transfer printing can be performed multiple times at the same location, so the film thickness can be increased. This is because it is easy to enhance the glossiness. In the case of the printing process, the printing process may be repeated a plurality of times in order to make the display layer 50 a desired thickness.

Before the forming step, a step of forming a base coat layer on the surface of the smoothed sheet member may be provided. Further, after the printing step, there may be a step of forming a top coat layer on the display layer 50.

(Second Embodiment)
FIG. 11 is a plan view showing a configuration example of the pants-type diaper 1a according to the embodiment. In the present embodiment, the pants-type diaper 1a has a ventral portion (ventral waist belt) 2 located on the front side and a dorsal portion (dorsal waist belt) located on the rear side arranged along the longitudinal direction L. 3 and a crotch portion 4 located between the ventral side portion 2 and the dorsal side portion 3 (divided into). The ventral side 2 is a portion that comes into contact with the wearer's abdomen. The dorsal side portion 3 is a portion that comes into contact with the buttock portion or the back portion of the wearer. The crotch portion 4 is a portion that comes into contact with the crotch of the wearer, and is confined inside the width direction W. The pants-type diaper 1a includes an absorbent main body 10 and an exterior sheet 5. The absorbent body 10 includes the absorber 14, is located in the range from the ventral side 2 to the dorsal side 3 via the crotch portion 4 in the longitudinal direction L, and has a substantially constant width range in the width direction W. It is located in and therefore has a substantially rectangular shape. The configuration of the absorbent main body 10 is the same as that of the absorbent main body 10 of the first embodiment except that it has a substantially rectangular shape. The exterior sheet 5 has a two-layer structure including an exterior sheet located on the skin side and an exterior sheet located on the non-skin side.

The ventral portion 2 and the dorsal portion 3 are provided with a plurality of elastic members 70a and 70b for waist gather and a plurality of elastic members 71a and 71b, respectively, between the two layers of exterior sheets. The plurality of elastic members 70a and 70b are arranged outside and inside the ventral side 2 in the longitudinal direction L, respectively. The plurality of elastic members 70a are arranged at intervals in the longitudinal direction L along the width direction W in their respective predetermined regions on both sides of the longitudinal center line CL. The predetermined region is a region in the width direction W from the end portion 2a to the inner portion of the edge portion of the absorbent body 10 facing the end portion 2a. The plurality of elastic members 70b extend from one end 2a to the other end 2a along the width direction W, and are arranged at intervals in the longitudinal direction L. Similarly, the plurality of elastic members 71a and 71b are arranged outside and inside the dorsal side portion 3 in the longitudinal direction L, respectively. The plurality of elastic members 71a are arranged at intervals in the longitudinal direction L along the width direction W in their respective predetermined regions on both sides of the longitudinal center line CL. The predetermined region is a region in the width direction W from the end portion 3a to the inner portion of the edge portion of the absorbent body 10 facing the end portion 3a. The plurality of elastic members 71b extend from one end 3a to the other end 3a along the width direction W, and are arranged at intervals in the longitudinal direction L. The plurality of elastic members 70a, 70b, 71a, 71b expand and contract the waist opening, and are exemplified by rubber threads. It can be said that the ventral side portion 2 and the dorsal side portion 3 are defined in the range of the longitudinal direction L in which the plurality of elastic members 70a, 70b, 71a, 71b are arranged.

FIG. 12 is a partially enlarged bottom view (viewed from the non-skin side) including the ventral side 2 of the pants-type diaper 1a according to the embodiment. In the present embodiment, the ventral portion 2 has a ventral low elastic region 31 having low elasticity in the width direction W and a ventral high elastic region 32 having high elasticity in the width direction W. The ventral low expansion / contraction region 31 is a substantially rectangular region located in the central portion of the width direction W in the ventral side 2 and extending from the front edge in the longitudinal direction L to the rear side. The ventral high stretch region 32 is a region adjacent to both sides of the ventral low stretch region 31 in the width direction W and the rear side in the longitudinal direction L. In the ventral low expansion / contraction region 31, the elongation ratio ((length after extension-original length) / (original length)) with respect to a predetermined tensile force in the width direction W is the width of the ventral high expansion / contraction region 32. It is a region of 1/3 or less of the elongation rate in the direction W, preferably a region of 1/5 or less, and more preferably a region of 1/10 or less. For example, the ventral low expansion / contraction region 31 is a region in which an elastic member that expands / contracts in the width direction W does not exist, or a region in which an elastic member exists but the elastic member does not function much as an elastic member (does not expand / contract so much). .. Since the ventral low expansion / contraction region 31 is a region that overlaps with the absorber 14 in the thickness direction T, the contraction of the absorber 14 is suppressed by lowering the elasticity, and the absorption performance of the absorber 14 is lowered. Is suppressed. On the other hand, the ventral high expansion / contraction region 32 is a region in which elastic members 70a and 70b that expand / contract in the width direction W exist. Therefore, the ventral high expansion / contraction region 32 and the ventral low expansion / contraction region 31 are defined by the region where the elastic members 70a and 70b that can function as the elastic member exist and the region where the elastic member that can function as the elastic member does not exist. NS. The term "low elasticity" includes the case where the elasticity does not expand. The elasticity of each expansion / contraction range is determined by the elasticity of the elastic member.

The pants-type diaper 1a is provided with a display layer 50 on the surface of the ventral low expansion / contraction region 31 of the ventral side portion 2, and therefore on the surface of the exterior sheet 5 (exterior member). The display layer 50 overlaps the absorber 14 in a plan view. In the present embodiment, the display layer 50 includes a base material 20 laminated on the exterior sheet 5 and a display layer 50 laminated on the base material 20. However, the base material 20 may be omitted, and the display layer 50 may be directly laminated on the exterior sheet 5. The configurations of the base material 20 and the display layer 50 are the same as those in the first embodiment.

FIG. 13 is a partially enlarged bottom view (viewed from the non-skin side) including the back side portion 3 of the pants-type diaper according to the embodiment. In the present embodiment, the dorsal portion 3 has a dorsal low elastic region 35 having low elasticity in the width direction W and a dorsal high elastic region 36 having high elasticity in the width direction W. The configuration of the dorsal low elastic region 35 and the dorsal high elastic region 36 is the same as the configuration of the ventral low elastic region 31 and the ventral high elastic region 32 of the ventral portion 2 except that they are located in the dorsal portion 3. be. Since the dorsal low expansion / contraction region 35 is a region that overlaps with the absorber 14 in the thickness direction T, the contraction of the absorber 14 is suppressed by lowering the elasticity, and the absorption performance of the absorber 14 is lowered. Is suppressed. The pants-type diaper 1a may be provided with a display layer 50 on the surface of the dorsal low expansion / contraction region 35 of the dorsal side portion 3, that is, the surface of the exterior sheet 5 (exterior member) (not shown).

In this pants-type diaper 1a, the display layer 50 is located on the non-skin side of at least one of the ventral low stretch region 31 and the dorsal low stretch region 35 in at least one of the ventral portion 2 and the dorsal portion 3. Therefore, the shrinkage of the display layer 50 can be suppressed, unevenness and wrinkles can be made difficult to form, and the visibility of the display layer 50 can be improved. Therefore, the position of the ventral side portion 2 or the dorsal side portion 3 of the pants-type diaper 1a can be easily recognized, and the pants-type diaper 1a can be easily replaced.

In the present embodiment, the pants-type diaper 1a further includes a post-treatment tape 80 arranged on the surface of the dorsal side 3 on the non-skin surface side of the central portion in the width direction W. The post-treatment tape 80 is arranged and fixed in the tape fixing region TA located on the non-skin surface side surface of the central portion in the width direction W in the dorsal side portion 3. In this case, the post-treatment tape 80 is located on the outermost side of the pants-type diaper 1a at the time of use (see FIG. 13) and constitutes a part of the exterior of the pants-type diaper 1a. It can be said to be one.

The pants-type diaper 1a is provided with a display layer 50a on the surface of the post-treatment tape 80 of the back side portion 3. In the present embodiment, the display layer 50a includes a base material 20a laminated on the post-treatment tape 80 and a display layer 50a laminated on the base material 20a. However, the base material 20a may be omitted, and the display layer 50a may be directly laminated on the post-treatment tape 80. The configuration of the display layer 50a, the base material 20a, and the display layer 50a is the same as the configuration of the display layer 50, the base material 20, and the display layer 50 of the first embodiment.

In this pants-type diaper 1a, the display layer 50a is located on the post-treatment tape 80. Therefore, the position of the post-treatment tape 80 of the pants-type diaper 1a can be easily recognized. As a result, when the pants-type diaper 1a is replaced, the used pants-type diaper 1a can be appropriately treated with the post-treatment tape 80 in a rolled state, and the pants-type diaper 1a can be easily replaced. can.

The measurement method of each of the above numerical values is as follows.
<Sheet basis weight> The sheet basis weight is measured by the following method.
(1) A portion having a size of 5 cm × 5 cm is cut out from the sheet and used as a sample.
(2) The sample is dried in an air atmosphere of 100 ° C. or higher.
(3) Measure the mass of the sample.
(4) Divide the measured value of mass by the area of the sample to calculate the basis weight of the sample.
(5) The value obtained by averaging the basis weights of 10 samples is defined as the basis weight of the sheet.

<Height / Thickness> The height / thickness is measured by the following method.
(1) The absorbent article is cut into a size of 100 mm × 100 mm centering on the measurement target area and used as a sample.
(2) Using a laser displacement meter (High-precision two-dimensional laser displacement meter LJ-G series (model: LJ-G030) manufactured by KEYENCE CORPORATION), measurement is performed by the following non-contact method. That is, the sample is placed on a horizontal measuring table, and the displacement from the measuring table is measured with a laser displacement meter for five different parts.
(3) Let the average value of the five measured values be the height or thickness (mm) of the object.

<Thickness / Height> The thickness / height is measured as follows.
(1) A measurement target region (example: a region including a concave portion 22 having a display portion 50 and a convex portion 21 around the concave portion 21) is cut out from the absorbent article as a sample.
(2) Using a digital microscope VHX-100 manufactured by KEYENCE CORPORATION, an enlarged image is taken from a direction perpendicular to the cut surface of the sample. The magnification is, for example, 20 to 100 times. The enlarged image is created on the PC screen as a 3D image.
(3) The 3D image is converted into a 2D image, and the thickness and height parallel to the cut surface of the measurement target (example: concave portion 22, convex portion 21, display layer 50) are measured on the 2D image.
(4) Repeat steps (1) to (3) several times (example: 3 times), and use the average value as the thickness / height.

<Glossiness> The glossiness is measured as follows.
(1) A measurement target region (example: region including the display unit 50) is cut out as a sample from the absorbent article.
(2) The glossiness of the surface of the sample is measured using a gloss checker IG-331 (based on JIS Z 8741 (1997) mirror glossiness) manufactured by HORIBA, Ltd. The incident angle and the light receiving angle of the gloss checker IG-331 are both 60 °, and the measurement area is an ellipse having a major axis of 6 mm and a minor axis of 3 mm. When the measurement target (example: display layer 50) is smaller than the measurement area of the gloss checker, the area including the entire measurement target is measured, and when the measurement target is larger than the measurement area of the gloss checker, the measured value among the measurement targets. Measure the area where is maximum.
(3) Repeat steps (1) and (2) several times (example: 3 times), and use the average value as the glossiness.

<Color difference> The color difference is measured as follows.
(1) A measurement target region (example: a region including a concave portion 22 having a display portion 50 and a convex portion 21 around the concave portion 21) is cut out from the absorbent article as a sample.
(2) Using the X-Rite eXact Standard (measurement diameter: 1.5 mm) manufactured by X-Rite, the CIE L ^* a ^* b ^{* of the part to be measured (example: the area including the display part 50) of the sample.} The coordinates are measured at 10 or more points by changing the position, and the average value ([L ₁ ^* , a ₁ ^* , b ₁ ^* ]) of them is calculated.
^{(3) The L *} a ^* b ^* coordinates of the part to be compared (example: the region including the convex portion 21) of the sample are measured at 10 or more points by changing the position, and the average value ([L ₂ ^* , a) of them is measured. ₂ ^* , b ₂ ^* ]) is calculated.
(4) The color difference ΔE is calculated by the following equation:
ΔE = {(L ₁ ^* -L ₂ ^* ) ² + (a ₁ ^* -a ₂ ^* ) ² + (b ₁ ^* -b ₂ ^* ) ² } ^1/2
Calculated by

The absorbent article of the present invention is not limited to each of the above-described embodiments, and is appropriately combined with each of the techniques described in each embodiment within a range not deviating from the object and purpose of the present invention. It is possible to apply the above and publicly known technology. That is, the technique described in the first embodiment using the tape-type diaper can be applied to the pants-type diaper of the second embodiment as long as there is no technical inconsistency, and the second embodiment using the pants-type diaper. The technique described in the embodiment is applicable to the tape-type diaper of the first embodiment as long as no technical inconsistency occurs.

1 Tape type diaper 1a Pants type diaper 50 Display layer

Claims (14)

An absorbent article having an exterior member that constitutes the exterior.
The exterior member is
The surface on the non-skin side includes a concave portion that is concave toward the skin side and a convex portion that is located around the concave portion.
A display layer showing a pattern, which is formed of a material different from the exterior member, is provided on the non-skin side surface of the recess.
Absorbent article. The display layer is not arranged on the convex portion,
The absorbent article according to claim 1. The recess is in a plan view.
The main part located in the center of the recess and
An edge portion located on the outer edge of the main portion and in contact with the convex portion,
Including
The display layer is arranged at the main portion and not at the front edge portion.
The absorbent article according to claim 1 or 2. The recess is in a plan view.
The main part located in the center of the recess and
An edge portion located on the outer edge of the main portion and in contact with the convex portion,
Including
The display layer is arranged at the main portion and the front edge portion.
The absorbent article according to claim 1 or 2. The height of the display layer with respect to the non-skin side surface of the recess is lower than the height of the convex portion with respect to the non-skin side surface of the recess.
The absorbent article according to any one of claims 1 to 4. The display layer has irregularities on the surface on the non-skin side.
The absorbent article according to any one of claims 1 to 5. The other material comprises an ink and / or foil containing a metallic component.
The absorbent article according to any one of claims 1 to 6. The display layer is arranged in a region overlapping the absorbent body of the absorbent article in the thickness direction or a non-stretchable region of the absorbent article.
The absorbent article according to any one of claims 1 to 7. The absorbent article is a disposable diaper and
The display layer is arranged in the waist area of the disposable diaper.
The absorbent article according to any one of claims 1 to 8. The display layer is arranged in the central portion of the waist circumference region.
The absorbent article according to claim 9. The disposable diaper is a tape-type diaper,
The display layer is arranged in the target tape area of the tape-type diaper.
The absorbent article according to any one of claims 1 to 10. The disposable diaper is a tape-type diaper,
The display layer is arranged in the side flap region of the tape-type diaper.
The absorbent article according to any one of claims 1 to 11. The display layer is arranged in the undercarriage portion of the absorbent article.
The absorbent article according to any one of claims 1 to 12. The display layer is arranged in the crotch portion of the absorbent article.
The absorbent article according to any one of claims 1 to 13.

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