TW201909860A - Absorbent article - Google Patents

Abstract

This absorbent article (1) is provided with: an absorbent main body (10) which is folded at the front and rear in a crotch section; a front-side band member (30) which is joined to a front-side upper end of the absorbent main body (10); and a rear-side band member (40) which is joined to a rear-side upper end of the absorbent main body (10). The two ends of the front-side band member (30) and the two ends of the rear-side band member (40) in the left-right direction are joined to each other. The absorbent main body (10) is provided with a leak prevention sheet (15a). A main graphic (101, 102) is provided to the non-skin-side surface of the leak prevention sheet (15a) on at least one side among the front side and the rear side. The area of the main graphic (101, 102) when the absorbent main body (10) is in an unfolded state is at least 40% of the area of the non-skin-side surface at the one side. The area of a portion in which the main graphic (101, 102) and the band member (30, 40) on the one side overlap is less than 50% of the area of the main graphic (101, 102).

Description

Absorbent article

This invention relates to absorbent articles.

A disposable diaper is known as an absorbent article that absorbs excrement. In one aspect of the disposable diaper, it is known that a pattern of a person character, a pattern, or the like is marked on the non-skin side of the absorbent main body that absorbs excrement, and the design diaper is improved. For example, in the member constituting the diaper, the nonwoven fabric forming the back sheet and the thread rubber forming the stretchable member are provided with the content of the titanium oxide being 5% by weight or less, thereby improving the transmission of the threaded rubber. A disposable diaper is used after the visibility of the pattern of the inside of the back sheet is indicated by the non-woven fabric. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2004-188060

[Problems to be solved by the invention]

However, in the disposable diaper of Patent Document 1, since the composition of the material (the content of titanium oxide) is limited, there is a problem in the function and manufacturing cost of the diaper itself. On the other hand, when the content of the titanium oxide is not limited, the whiteness of the material becomes high, and the pattern marked on the inner side of the material is not easily visible from the outside (that is, the material is not easily permeated), and there is a diaper. The design is deteriorating. In particular, on the ventral side and the back side of the absorbent body, the front side belt member and the back side belt member are joined, respectively, in the so-called three-part disposable disposable diaper, in the area where the absorbent body and the belt member are repeated. It is difficult to visually recognize the pattern from the outside, and the design deterioration is remarkable.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an absorbent article which is easy to visually recognize a pattern which is attached to an absorbent body from the outside and which has high design. [Means for solving problems]

The main invention for achieving the above objectives is

An absorbent article having an up-and-down direction and a left-right direction and a front-rear direction intersecting each other, an absorbent body disposed along the up-and-down direction and folded forward and backward in a crotch portion; a front side belt member along the aforementioned The left side direction is provided, the front side is joined to the front upper end portion of the absorbent body in the up-and-down direction; and the rear side belt member is formed differently from the front side belt member and is disposed along the left-right direction. The rear side is joined to the rear upper end portion of the absorbent body in the vertical direction, and the absorbent article of the both end portions of the front side belt member and the both end portions of the rear side belt member are joined to each other in the left-right direction. The absorptive body includes a liquid-absorbent absorbent core and a liquid-impermeable leakage preventing sheet disposed on the non-skin side than the absorbent core, and at least one of the front side and the rear side. a side surface having a main pattern on a non-skin side surface of the leakage preventing sheet, wherein the absorbent body is elongated in the vertical direction and the horizontal direction The area of the main pattern is 40% or more of the area of the non-skin side surface on the one side, and the area of the portion on which the one side side member overlaps with the main pattern is an area that is less than the area of the main pattern. 50%.

Other features of the present invention will become apparent from the description of the specification and appended drawings. [Effects of the Invention]

According to the present invention, it is possible to provide an absorbent article which is easy to visually recognize the pattern of the absorbent body from the outside and which is highly designed.

[Formation for carrying out the invention]

At least the following matters will be understood from the description of the specification and the accompanying drawings.

An absorbent article having an up-and-down direction and a left-right direction and a front-rear direction intersecting each other, an absorbent body disposed along the up-and-down direction and folded forward and backward in a crotch portion; a front side belt member along the aforementioned The left side direction is provided, the front side is joined to the front upper end portion of the absorbent body in the up-and-down direction; and the rear side belt member is formed differently from the front side belt member and is disposed along the left-right direction. The rear side is joined to the rear upper end portion of the absorbent body in the vertical direction, and the absorbent article of the both end portions of the front side belt member and the both end portions of the rear side belt member are joined to each other in the left-right direction. The absorptive body includes a liquid-absorbent absorbent core and a liquid-impermeable leakage preventing sheet disposed on the non-skin side than the absorbent core, and at least one of the front side and the rear side. a side surface having a main pattern on a non-skin side surface of the leakage preventing sheet, wherein the absorbent body is elongated in the vertical direction and the horizontal direction The area of the main pattern is 40% or more of the area of the non-skin side surface on the one side, and the area of the portion on which the one side side member overlaps with the main pattern is an area that is less than the area of the main pattern. 50%.

According to such an absorbent article, the main pattern is easily disposed in a region where the absorbent body does not overlap the belt member. Thereby, since the main pattern and the belt member are not easily overlapped, the main pattern can be easily viewed from the outside of the absorbent article, and the design of the absorbent article can be improved.

In such an absorbent article, it is desirable to provide a rear main pattern on the rear side of the absorbent body.

According to such an absorbent article, when the wearer of an infant or the like is crawling while wearing the absorbent article, the rear main pattern can be easily viewed on the rear side surface of the absorbent body covering the buttocks of the infant.

In the absorbent article in which the absorbent body is stretched in the vertical direction and the horizontal direction, the area of the rear main pattern is a region of the absorbent body that is not overlapped with the rear side belt member. More than 80% is expected.

According to such an absorbent article, since the rear side main pattern is not provided in a wide area in which the rear side belt member is overlapped in the rear side surface of the absorbent body, the wearer of the infant or the like wears the state of the absorbent article. When crawling down, it is easier to visualize the main graphics on the back side.

In such an absorbent article, it is preferable that the rear main pattern repeats at the position of the lower portion of the crotch and the position of the absorbent body folded forward and backward.

According to such an absorbent article, a rear main pattern is provided on the lower side (the lower side of the lower side) of the absorbent article in the vertical direction, and the wearable state of the absorbent article is from the buttocks of the wearer (infant). The wide area under the arm makes it easy to visualize the pattern and enhance the design.

In such an absorbent article, a front main pattern is provided on the front side of the absorbent body, and a rear main pattern is provided on the rear side of the absorbent body, and the center position of the front main pattern is higher than the rear in the vertical direction. The central position of the main graphic on the side is higher as desired.

According to such an absorbent article, by providing the front main pattern at a high position, it is easy to suppress the front main pattern being contracted by the wearer's legs and contracting when worn. On the other hand, by providing the rear main pattern at a low position, it is easy to visualize the rear main pattern in a wide range of the wearer's buttocks. Therefore, it is easy to visualize in the most suitable state of the main graphics before and after.

In such an absorbent article, it is desirable that the area of the front side main pattern is smaller than the area of the rear side main pattern.

According to such an absorbent article, by forming the front main pattern smaller than the rear main pattern, the front main pattern and the front side belt member are less likely to be overlapped, and the visibility of the front main pattern can be suppressed from deteriorating. On the other hand, since the rear main pattern can be formed largely, the visibility of the main pattern on the back side can be improved.

In such an absorbent article, the area of the portion where the rear side main pattern overlaps with the rear side belt member is smaller than the area of the portion where the front side main pattern and the front side belt member overlap.

According to such an absorbent article, the portion where the rear main pattern and the rear side belt member are repeated becomes smaller, and the visibility of the rear main pattern is less likely to deteriorate. On the other hand, since the front main pattern is disposed at a position (ventral side) that is not easily visible when the wearer (for example, an infant) crawls, even if the front main pattern and the front side belt member are overlapped, the visibility is large. The deterioration is not obvious. Therefore, it is possible to suppress deterioration of visibility of the entire absorbent article.

In such an absorbent article, it is desirable that the front side main pattern and the front side belt member are not overlapped.

According to such an absorbent article, it is possible to suppress the case where the front side main member is masked by the front side belt member. Therefore, the visibility of the main pattern on the front side is good, and the design of the absorbent article can be further improved.

In the absorbent article, the main pattern of the printing tone value of the main pattern in the portion where the main pattern overlaps with the one surface of the absorbent body is the same as the surface of the absorbent body. The average of the aforementioned print tone values of the aforementioned main pattern in the repeated portion is larger as desired.

According to such an absorbent article, when viewed from the outside, in the portion where the main pattern and the belt member are repeated, the concentration of the main pattern is lighter than the image actually printed. On the other hand, in the portion where the main pattern and the belt member are not overlapped, the concentration of the main pattern appears to be equal to the image actually printed. Therefore, in the portion where there is no portion overlapping with the belt member, it is possible to suppress the case where the concentration of the main pattern seems to change abruptly. Thereby, good visibility can be achieved.

In such an absorbent article, the printing tone value of the main pattern gradually decreases from the upper side toward the lower side in the vertical direction as desired.

According to such an absorbent article, in a region where the main pattern and the belt member overlap (repeating portion), the density of the pattern becomes thicker, and in a region where the main pattern and the belt member do not overlap (the non-repeating portion), the density of the pattern becomes light. tendency. Further, even if the position of the boundary between the repeating portion and the non-overlapping portion deviates, the unnatural concentration change in the vicinity of the boundary becomes inconspicuous, and deterioration of visibility is easily suppressed.

In the absorbent article, the main pattern of the brightness of the main pattern in the portion where the main pattern overlaps with the one surface of the absorbent body does not overlap the surface of the absorbent body. The average of the brightness of the aforementioned main graphics in the section is smaller as desired.

According to such an absorbent article, when viewed from the outside, in the portion where the main pattern and the belt member are repeated, the brightness of the main pattern is higher than that of the actually printed image. On the other hand, in the portion where the main pattern and the belt member are not overlapped, the main pattern having the same brightness as the actually printed image can be seen. Therefore, in the portion where there is no portion overlapping with the belt member, it is possible to suppress the case where the brightness of the main pattern seems to change abruptly. Thereby, good visibility can be achieved.

In such an absorbent article, it is desirable that the outline of the outer shape of the main pattern is formed to have a thickness of 3 mm or more.

According to such an absorbent article, when a plurality of nonwoven fabrics are stacked on the main pattern, the shape of the main pattern can be easily recognized by the nonwoven fabric.

In such an absorbent article, the main pattern is a pattern similar to the persona represented by the product packaging bag of the absorbent article.

According to such an absorbent article, the infant and the caregiver can easily recognize the main figure, and it is easy to understand the correlation between the absorbent article and the main figure.

In such an absorbent article, the position of the upper end of the rear side of the absorbent body is higher than the position of the upper end of the front side of the absorbent body in the vertical direction.

According to such an absorbent article, since the area of the rear side surface of the absorbent body is larger than the area of the front side surface, the area where the main pattern can be printed is made larger on the rear side surface. Therefore, the rear main pattern can be designed more freely. Thereby, the design of the highly absorbent article can be adjusted.

In such an absorbent article, the position of the upper end of the rear side of the absorbent body is the same as the position of the upper end of the front side of the absorbent body in the vertical direction, or the position of the upper end of the rear side of the absorbent body is higher than the absorbent The lower end of the front side of the body is lower in position as desired.

According to such an absorbent article, since the area of the front side surface of the absorbent body becomes large, the area where the main pattern can be printed is increased on the front side. Therefore, the front side main pattern can be formed in the upper side region in the up-and-down direction, and when the absorbent article is worn, when the front side surface is sandwiched by the wearer's legs on the lower side (the lower crotch side) of the absorbent body, The main pattern on the front side is also not easy to shrink. Therefore, it is easy to suppress the deterioration of the visibility of the front main pattern.

In the absorbent article, the indicator body is provided with an instruction portion that changes color in contact with the water in the vertical direction along the vertical direction, and is disposed on the front side of the absorbent body in the vertical direction. It is desirable that the length is longer than the length of the aforementioned indication portion disposed on the rear side of the aforementioned absorbent body.

According to such an absorbent article, since the rear main pattern and the instruction portion are not easily overlapped, even when the color of the indication portion changes, it is easy to suppress deterioration of the visibility of the rear main pattern.

In such an absorbent article, a front main pattern is provided on a front side of the absorbent body, and a rear main pattern is provided on a rear side of the absorbent body, and an area of a portion of the front main pattern overlapping the indicator portion is larger than the aforementioned It is desirable that the area of the rear main pattern and the portion where the above-mentioned indication portion overlap is larger.

According to such an absorbent article, since the area of the rear main pattern and the overlapping portion of the indicator portion is small, the visibility of the rear main pattern is less likely to deteriorate even when the color of the indicator portion changes. On the other hand, although the area of the front main pattern and the overlapping portion of the indication portion is increased, the front main pattern and the rear main pattern are less likely to be visually recognized, so that the visibility of the absorbent article is not easily deteriorated as a whole. Become conspicuous.

In such an absorbent article, it is desirable that the indicator portion is not disposed on the rear side of the absorbent body.

According to such an absorbent article, since the area of the overlapping portion of the indication portion and the rear main pattern can be minimized, even when the color of the indication portion changes, it is easier to suppress deterioration of the visibility of the rear main pattern.

In such an absorbent article, it is desirable that the rear main pattern and the indicator portion are not overlapped.

According to such an absorbent article, even when the color of the indicator portion changes, the visibility of the main pattern on the rear side is less likely to be affected, so that it is easier to suppress the deterioration of the visibility of the rear main pattern.

In the absorbent article, the absorbent body has a positioning mark that serves as a reference position at the time of processing the sheet member, and the front side belt member and the rear side belt member have a waist elastic member that expands and contracts in the left-right direction, and the positioning is performed. The mark is repeatedly arranged to be desired as at least a part of the region in which the tension due to the waist elastic member described above acts.

According to such an absorbent article, by providing the positioning mark, the absorbent body can be processed correctly in the manufacturing process of the absorbent article. Further, when the absorbent article is worn, the positioning mark is also contracted by the contraction of the waist elastic member, so that the positioning mark becomes inconspicuous. Thereby, it is possible to suppress the deterioration of the visibility of the main pattern.

(=========================================================================================================== It is only referred to as "diaper 1"). Fig. 1 is a schematic perspective view of the diaper 1 viewed from the front side. Fig. 2 is a schematic plan view of the diaper 1 in a state in which it is stretched and stretched from the skin side. Fig. 3 is a schematic cross-sectional view showing a cross section taken along the line A-A in Fig. 2; FIG. 4 is a view for explaining the structure of the absorbent body 10. In addition, the "elongated state" in FIG. 2 means that the product (diaper 1) is stretched to a state where there is no wrinkles, and specifically, each member constituting the diaper 1 (for example, an absorbent body 10 and a front side belt member 30 which will be described later) The size of the material is elongated to a state in which it is uniform or close to the size of the member monomer.

In the pants-type state of FIG. 1, the diaper 1 has three directions orthogonal to each other in the up-down direction, the left-right direction, and the front-back direction. In the following, the upper side in the up-and-down direction in the pants-type state is also referred to as the "waist opening side", and the lower side in the up-and-down direction is also referred to as the "underarm side". Further, the front side in the front-rear direction is also referred to as "ventral side", and the rear side is also referred to as "back side".

On the other hand, in the unfolded state of Fig. 2, the diaper 1 has a longitudinal direction and a broad side direction as three directions orthogonal to each other. In addition, one side and the other side in the longitudinal direction in the developed state are also referred to as "ventral side" and "back side", respectively. Further, the above-described wide side direction in the unfolded state is the same direction as the above-described left and right direction in the pant type state. Therefore, the broad side direction is also referred to as "left and right direction" below. Further, the longitudinal direction of the unfolded state is the direction along the vertical direction of the pants-type state. In addition, as shown in FIG. 3, the direction orthogonal to the vertical direction (longitudinal direction) and the left-right direction (wide side direction) is referred to as "thickness direction", and the side that is in contact with the skin of the wearer is referred to as "skin Side", the opposite side is referred to as "non-skin side".

As shown in Fig. 1, the diaper 1 is a so-called three-member type and has three parts 10, 30, and 40. In other words, the diaper 1 is an absorbent main body 10 having an absorbent body that absorbs urine or the like in contact with the wearer's crotch portion as a first component, and has a front side band covering the ventral portion from the front side of the wearer. The member 30 is a second component, and has a rear side belt member 40 that covers the back side portion from the rear side of the wearer as a third component.

As shown in Fig. 2, in the unfolded state of the diaper 1, the front side belt member 30 and the rear side belt member 40 are arranged in parallel with each other in the longitudinal direction (up-and-down direction) of the absorbent body 10, and the absorbent body 10 is placed in parallel. Laid between these. Further, the front upper end portion including the front upper end 10ea of the absorbent body 10 is joined to the front side belt member 30, and the rear side upper end portion including the rear side upper end 10eb of the absorbent body 10 is joined and fixed to the rear side belt member 40 to have an appearance thereof. The shape is formed to look at a substantially H shape in plan view.

Further, from this state, the absorbent body 10 is folded in half at the folding position C10 in the longitudinal direction. That is, it is folded back and forth in the lower part of the crotch. In the folded state, the front side belt member 30 and the rear side belt member 40 which are opposed to each other are joined to the side edge joint portion 30ew and the side edge joint portion 40ew of the portion of the wearer's flank. In other words, both end portions in the left-right direction are joined and connected, and the belt members 30 and 40 can be formed in a ring shape. Thereby, the diaper 1 in which the waist opening 1HB and the pair of leg-openings 1HL are formed as shown in FIG. 1 is formed.

(Absorbing body 10) The absorbent body 10 has a function of absorbing excrement such as urine, and is formed in a rectangular shape in plan view as shown in Figs. 2 and 4, and is disposed along the longitudinal direction of the diaper 1 in the longitudinal direction. The center in the left and right direction. The absorbent main body 10 includes an absorbent core 11 , a surface sheet member 13 that covers the absorbent core 11 from the skin side, and an absorbent core 11 that covers the non-skin side to form an exterior of the absorbent body 10 . Inside sheet member 15.

The absorbent core 11 is a member in which a liquid absorbing material is laminated, and can absorb excrement such as urine. As the liquid absorbing material, for example, a liquid absorbing fiber such as pulp fiber can be used. Further, the absorbent core 11 may contain, for example, a highly absorbent polymer as the liquid absorbing granular material, or may contain a liquid absorbing material other than the liquid absorbing fibrous material and the liquid absorbing granular material. Further, the absorbent core 11 can also be coated with a liquid permeable sheet (not shown) such as a tissue.

The absorbent core 11 of the present embodiment has a front end portion 11a as an upper end portion in the vertical direction in FIGS. 2 and 4 and a rear end portion 11b as a lower end portion in the vertical direction in FIG. Further, between the front end portion 11a and the rear end portion 11b, there is a narrowed portion 11c having a width in the left-right direction that is narrower than the front end portion 11a and the rear end portion 11b. Thereby, the absorptive core 11 is configured in a plan view substantially hourglass shape as shown in FIGS. 2 and 4 .

The surface sheet member 13 is a sheet-like member that covers the absorbent core 11 from the skin side, and is, for example, a liquid-permeable nonwoven fabric having a larger planar size than the absorbent core 11. Further, the inner sheet member 15 is a sheet-like member that covers the absorbent core 11 from the non-skin side, and has a larger planar size than the absorbent core 11, and an example thereof may be a polyethylene or a poly A liquid-impermeable leakage preventing sheet 15a such as propylene or a sheet having a two-layer structure of an exterior sheet 15b such as a nonwoven fabric.

Moreover, in the diaper 1, as shown in FIG. 4, the so-called three-dimensional hem LSG and the leg-surround hem LG are formed by the exterior sheet 15b. The three-dimensional hem LSG is a leakage preventing wall portion that is provided at each end portion of the surface sheet member 13 in the left-right direction. On the other hand, the leg hem LG is formed in each leg opening of the diaper 1 . 1HL, 1HL leg circumference expansion and contraction. The exterior sheet 15b has a portion 15bf extending in the left-right direction from both sides in the left-right direction of the leakage preventing sheet 15a, and the portion 15bf is folded in the left-right direction at the end portion of the absorbent body 10 in the left-right direction as a folding position. The leg-hole elastic member 17 and the leg-hole reinforcing elastic member 19 such as the thread rubber are fixed in a state in which the vertical direction is elongated in the vertical direction in the vicinity of the folding position, whereby the leg-surrounding LG is formed. . Further, the leg-surrounding elastic member 19 is not necessarily required, and the leg-surrounding LG may be formed only by the leg-surrounding elastic members 17.

The folded portion 15bf is further extended to the center side in the left-right direction, and the end portion covering the left and right direction of the surface sheet member 13 is joined to the surface sheet member 13 at both end portions in the up and down direction. Further, the portion 15bf is folded to the both outer sides in the left-right direction, and the LSG elastic member 18 such as the thread rubber is fixed in the vertical direction in the vertical direction at the tip end portion thereof. By contracting the LSG elastic member 18 in the vertical direction, the absorbent body 10 is bent in the vertical direction so that the surface sheet member 13 side becomes the inner peripheral side. When the absorbent body 10 is bent, the front end portion of the portion 15bf is contracted in the vertical direction by the contraction force applied from the LSG elastic member 18, and the front sheet member 13 rises up to function as a three-dimensional hem LSG.

Further, in some cases, a liquid permeable sheet such as a thin paper may be interposed between the surface sheet member 13 and the absorbent core 11 or between the back sheet member 15 and the absorbent core 11 (see Fig. 3). The second sheet.

A predetermined pattern is provided on the non-skin side of the leakage preventing sheet 15a of the absorbent body 10. In the example of FIG. 4, a character of a panda (main patterns 101 and 102 which will be described later) is printed as an example of a pattern. This pattern is visually recognized from the non-skin side (that is, the outer side of the diaper 1) through the exterior sheet 15b. In addition, in the top view of FIG. 4, the pattern (main pattern 101, 102) is also visible from the skin side of the absorbent body 10 (inside of the diaper 1). Hereinafter, the printed pattern is also referred to as "graphics". The details of the size and arrangement of the graphics will be described later.

On the other hand, on the skin side surface of the leakage preventing sheet 15a of the absorbent body 10, an instruction unit 60 that is an indicator for informing the user of the diaper 1 (for example, a caregiver of an infant) of the amount of absorption of liquid such as urine is provided. The indication portion 60 is indicated by a region surrounded by a broken line in FIG. 4, and is formed in a strip shape in the vertical direction (longitudinal direction of the absorbent body) in the center portion in the left-right direction. The indicator unit 60 is formed of a substance (ink) that changes its color by contact with water. When the wearer of the infant or the like wears the diaper 1 and urinates, the absorbent core 11 is used. The absorbed urine contacts the indicator portion 60 to change the color. Therefore, the user (the caregiver of the infant) can easily grasp the replacement time of the diaper 1 by visually recognizing the change in the color of the indication portion 60 from the outside of the diaper 1.

(Band members 30 and 40) Each of the front side belt member 30 and the rear side belt member 40 is a sheet member having a substantially rectangular shape as viewed from a soft sheet such as a non-woven fabric (see FIG. 2).

As shown in FIG. 3, the front side belt member 30 can be formed by laminating two sheets of non-woven fabrics 31 and 32 in the thickness direction. Further, a plurality of waist elastic members 35, 35, ... such as a thread rubber are disposed between the two nonwoven fabrics 31 and 32 in the left-right direction. The waist elastic members 35, 35, ... are joined and fixed to the nonwoven fabrics 31 and 32 while being spaced apart in the vertical direction while being spaced apart in the vertical direction. Thereby, the front side belt member 30 is stretchable in the left-right direction. Further, the nonwoven fabrics 31 and 32 are joined to each other via a belt member joint portion 37 formed of an adhesive such as a hot melt adhesive. The belt member joint portion 37 is formed, for example, in the range of the belt member joint portions 37a and 37b shown by the halftone dot portion of Fig. 2, and the belt member joint portions 37a and 37b are joined to fix the waist elastic member 35, and the front side belt member 30 is attached. Provides flexibility in the right and left direction. However, the range and size of the belt member joint portion 37 are not limited thereto.

In the present embodiment, at least a part of the waist elastic member 35 has a discontinuous portion in the center portion in the left-right direction. The discontinuous portion of the waist elastic member 35 is formed by cutting the waist elastic member 35 at a predetermined portion in the center portion in the left-right direction during the manufacturing process of the diaper 1. Specifically, the waist elastic member 35 is cut in a region between the pair of belt member joint portions 37b and 37b formed on both sides in the left-right direction. Then, the waist elastic member 35 starts to shrink from the cut position (cut end) toward the belt member joint portion 37b on both sides in the left-right direction, and stops contracting at the position of the inner side end of the belt member joint portion 37b in the left-right direction. This action is also referred to as the "reverse action" of the elastic member. In the present embodiment, the waist elastic member 35 is not attached to the region between the belt member joint portions 37b and 37b in the left-right direction (or a weak adhesive force to which the expansion and contraction force does not act may be joined). Therefore, when the waist elastic member 35 performs the reverse operation, the nonwoven fabrics 31 and 32 constituting the front side belt member 30 do not contract, and only the waist elastic member 35 contracts toward both sides in the left-right direction. In other words, the waist elastic member 35 is relatively displaced with respect to the front side belt member 30. Thereby, a discontinuous portion of the waist elastic member 35 is formed on the front side (ventral side) of the diaper 1 in the center portion in the left-right direction. In the discontinuous portion, the contraction force in the left-right direction does not easily act on the absorbent main body 10 (absorbent core 11), and the absorbent main body 10 (absorbent core 11) is easily widened in the left-right direction, so that it is effective. Suppress side leakage of excreta, etc.

In the upper side (waist opening side) of the front side belt member 30 in the vertical direction, the non-skin-side non-woven fabric 32 protrudes upward from the longitudinal upper end of the skin-side non-woven fabric 31, and the portion that folds toward the skin side forms the front side folding portion. 32f, the front side folded portion 32f is joined and fixed to the skin side of the nonwoven fabric 31 (see Fig. 3). Thereby, the upper end 30ea of the front side belt member 30 is covered by the front side folding portion 32f, and the edge of the upper end 30ea is less likely to fall into the wearer's skin (ventral waist portion) when the diaper 1 is worn, which is less likely to be worn. The sense of discomfort.

The front side belt member 30 is joined to the front upper end portion of the absorbent body 10 via the front side joint portion 51 (the non-skin side in FIG. 3 and the end portion on the waist opening side). The front side joint portion 51 is formed by a joining means such as welding or the like. In the present embodiment, the front side joint portion 51 is formed using an adhesive such as a hot melt adhesive.

The rear side belt member 40 has substantially the same configuration as the front side belt member 30. In other words, the rear side belt member 40 is formed by laminating two sheets of the nonwoven fabrics 41 and 42 in the thickness direction, and passes between the non-woven fabrics 41 and 42 in the thickness direction via the belt member joint portion 47 (the belt member in Fig. 2). The joint portions 47a and 47b) are joined and fixed in a state in which a plurality of waist elastic members 45 and 45 such as a thread rubber are elongated in the left-right direction. Thereby, the rear side belt member 40 is provided with the stretchability in the left-right direction. In addition, at least a part of the waist elastic member 45 is cut in the center portion in the left-right direction similarly to the waist elastic member 35, and reverse operation is performed, thereby forming a discontinuous portion. Therefore, even in the discontinuous portion on the rear side (back side), since the contraction force in the left-right direction with respect to the absorbent body 10 (absorbent core 11) does not easily act, the absorbent body 10 (absorbent core 11) tends to face left and right. Since the direction is widened, side leakage of the excrement or the like can be effectively suppressed.

In the upper side (waist opening side) of the rear side belt member 40, the nonwoven fabric 42 on the non-skin side protrudes upward from the upper end in the up-and-down direction of the non-woven fabric 41 on the skin side, and is formed by folding the protruding portion toward the skin side. Side folded portion 42f.

The rear side belt member 40 is joined to the rear upper end portion of the absorbent body 10 via the rear side joint portion 52 (the non-skin side in FIG. 3 and is the end portion on the waist opening side).

Further, in Fig. 3, a sheet member 38 that covers the front upper end 10ea of the absorbent body 10 and the lower end 32feb of the front folded portion 32f from the skin side is provided. By the sheet member 38, when the diaper 1 is worn, the edges of the front upper end 10ea and the lower end 32feb are less likely to fall into the wearer's skin, and the discomfort during wearing is less likely to occur. Similarly, a sheet member 48 that covers the rear upper end 10eb of the absorbent body 10 and the lower end 42feb of the rear folded portion 42f from the skin side is provided. By the sheet member 48, when the diaper 1 is worn, the edges of the rear upper end 10eb and the lower end 42feb are less likely to fall into the wearer's skin, and the discomfort during wearing is less likely to occur. However, in the diaper 1, the sheet members 38, 48 are not necessarily provided.

<Description of Pattern> A pattern of the non-skin side surface of the leakage preventing sheet 15a provided in the absorbent body 10 will be described. The figure is formed in the manufacturing process of the diaper 1, for example, by printing the leakage preventing sheet 15a by using a general printing apparatus such as an inkjet printer.

On the non-skin side of the leakage preventing sheet 15a, various patterns such as illustrations, photographs, patterns, and characters can be formed. That is, a variety of designs can be printed for shapes, colors, sizes, configurations, and the like. In the example of FIG. 4, although a character of a panda is printed, other figures (for example, a pattern, etc.) may be printed in addition to the character.

In the present embodiment, the pattern that satisfies the non-skin side surface of the leakage preventing sheet 15a satisfies the predetermined condition pattern as the "main figure". Specifically, the "main pattern" is printed on the non-skin side surface of the leakage preventing sheet 15a, and the front side surface or the rear side surface in a state in which the absorbent main body 10 is elongated in the vertical direction and the left-right direction. The surface on at least one side displays a pattern printed in an area of 40% or more of the area. In addition, the "front side" refers to the surface on the front side when the absorbent body 10 is folded in the folded position C10, and the front side of the absorbent body 10 in the longitudinal direction of the absorbent body 10 is closer to the front side than the folded position C10. . Similarly, the "rear side surface" refers to the surface on the rear side when the absorbent body 10 is folded in the folded position C10, and the back side of the absorbent body 10 in the longitudinal direction of the absorbent body 10 is more than the folded position C10. .

In the example of Fig. 4, a front main pattern 101 formed of a person character of a panda holding a balloon is formed on the front side surface of the absorbent body 10 (leak-proof sheet 15a). On the other hand, a rear main pattern 102 formed by a persona of a parent-child panda is formed on the rear side surface of the absorbent body 10 (leak-proof sheet 15a). However, the main pattern does not necessarily have to be formed on both sides of the front side and the rear side, and the main pattern may be formed only on the surface of one of the sides (desired to be the rear side).

Such a main pattern is an area of 40% or more of the front side or the rear side of the absorbent body 10, and is the most easily noticeable figure when the diaper 1 is worn, so it is easy for infants and their caregivers. It is expected to recognize the pattern of such personas. Moreover, since it is easier to recognize the connection with the diaper 1, the main figure is more desirable than the pattern of the persona who draws the character of the bag when the diaper 1 is distributed in the market.

Moreover, the main figure is a pattern in which a plurality of patterns are gathered to form a gathered pattern. For example, the front main pattern 101 shown in FIG. 4 is a pattern of two balloons held by a little panda riding a cloud, but "cloud" and "little panda" and "balloon" are surrounded by continuous lines. The locked area. In this case, not only the "little panda" as a character, but also "cloud" and "balloon" are constituent elements of the main figure. The area in which all the components are added is only 40 of the front side of the absorbent body 10. More than % of the size can be. For example, when a person character is superimposed to form a background, a character, or the like, the elements are grouped together to form a main figure. In addition, the outline of the main figure does not have to be a locked area, and a part of the outline can also be cut off halfway. For example, in the front main pattern 101 of FIG. 4, even if the outline of a part of the "cloud" is broken in the middle, the "cloud" becomes the main graphic composition as long as the user can recognize the pattern that is gathered together at a glance. Elements.

Moreover, the rear main pattern 102 shown in FIG. 4 is a pattern in which a giant panda and a red panda are arranged. At this time, the closed line is formed by the continuous line of "Giant Panda" and "Little Panda", and the main figure is composed of two personal characters. Further, the area in which the two personal characters are combined may be a size of 40% or more of the rear side surface of the absorbent main body 10. Further, when the rear main pattern 102 includes a plurality of personal characters (a panda in FIG. 4) as a constituent element of the main pattern, the plurality of personal objects are arranged side by side in the left-right direction (the broad side direction of the absorptive main body 10). The role is expected. Further, even when the plurality of personal characters are placed at separate positions, when the plurality of personal characters are gathered together, the plurality of personal characters constitute a main figure. For example, in the rear main graphic 102, it can be understood that a series of "family pandas" arranged by "Giant Panda" and "Little Panda". Therefore, if the "Giant Panda" and the "Little Panda" are arranged apart from each other, the two personal characters constitute the rear main pattern 102.

Here, an example of a method of calculating the ratio (%) of the area of the main pattern to the area of the front side surface (or the rear side surface) of the absorptive main body 10 will be described. First, the diaper which is the object of calculation of the area is extended in the up-down direction and the left-right direction, and the front side surface and the rear side surface of the absorptive main body 10 are image|photographed using the camera. Then, let the scanner read the captured image and obtain the read data. The read data is data arranged in two dimensions in accordance with the pixel data of the resolution read by the scanner, and each pixel data is a multi-stage tone value for each part of the absorptive body 10 and the main pattern ( Hereinafter, the read tone value) indicates the density (printing density). The pixel value indicated by the pixel data is larger, the printing density is rich, and the read tone value is smaller, and the printing density is light. Further, the read tone value indicated by the pixel data may be expressed by, for example, luminance and L* value (lightness).

Next, edge extraction processing of the main graphics is performed on the read data. In the edge extraction processing, a well-known filter such as a Laplacian filter or a sobel filter is applied, and a pixel forming a contour of a main pattern is extracted and binarized. As a result, the tone value of the pixel forming the outline of the main pattern is represented by the maximum color tone (255), and the tone value of the other pixels is represented by the lowest color tone (0). As described above, the main pattern is a closed area surrounded by substantially continuous lines, so that the area of the area enclosed by the contour pixels extracted in the read data can be accurately measured. The area of the main graphic. In addition, when the outline of the main figure is broken in the middle, the area of the main figure can be calculated by forming and adding a virtual outline to the read data. Similarly, the area of the front side (rear side) of the absorbent body 10 is also measured from the read data, whereby the ratio (%) of the area of the main pattern to the front side (rear side) can be calculated. Of course, the ratio (%) of the area of the main pattern can be calculated by other methods.

<Arrangement of Main Patterns> The diaper 1 improves the visibility of the pattern and the overall design of the diaper by adjusting the arrangement and size of the main patterns on the front side surface and the rear side surface of the absorbent body 10. Hereinafter, a specific configuration of the main figure will be described. FIG. 5A is a view for explaining the arrangement of the front main pattern 101 in the front side surface of the diaper 1. FIG. 5B is a view for explaining the arrangement of the rear main pattern 102 in the rear side surface of the diaper 1. 5A and FIG. 5B show the state (elongation state) in which the pants-type diaper 1 which formed the pants type is extended in the up-down direction and the left-right direction. Fig. 6 is a view showing a state in which an infant wearing the diaper 1 crawls. FIG. 7 is a view for explaining a cross-sectional state of the diaper 1 of the pants type.

As shown in FIG. 5A, the front side surface of the absorbent body 10 is on the upper side in the up-and-down direction (side of the waist opening side), and a part of the area is overlapped with the front side belt member 30. On the front side surface of the absorbent body 10, a portion overlapping the front side belt member 30 is referred to as a front side repeating portion 10fu, and a portion not overlapping is referred to as a front side non-repetitive portion 10fd. Further, as shown in FIG. 5B, the rear side surface of the absorbent body 10 is on the upper side in the vertical direction (side of the waist opening side), and a part of the area is overlapped with the rear side belt member 40. On the rear side surface of the absorbent body 10, a portion overlapping the rear side belt member 40 is referred to as a rear side repeating portion 10bu, and a non-overlapping portion is referred to as a rear side non-repetitive portion 10bd.

In the present embodiment, the front main pattern 101 is disposed such that the area of the portion where the front side main pattern 101 overlaps the front side belt member 30 is less than 50% of the area of the front side main pattern 101. In other words, in the front main pattern 101, 50% or more of the area is disposed on the front side non-repetitive portion 10fd. Similarly, the area of the portion where the rear side main pattern 102 and the rear side belt member 40 overlap is less than 50% of the area of the rear side main pattern 102, and the area of the rear side main pattern 102 where 50% or more is disposed at the rear side non-repetitive portion. 10bd.

In the front side repeating portion 10fu and the rear side repeating portion 10bu, since the belt members 30 and 40 are disposed so as to overlap the main patterns 101 and 102, it is difficult to visually compare the area with the front side non-overlapping portion 10fd and the rear side non-repeat portion 10bd. Main graphics 101, 102. Here, in the present embodiment, the main patterns 101 and 102 are more easily disposed on the front side non-repetitive portion 10fd and the rear side non-repetitive portion 10bd than the front side overlapping portion 10fu and the rear side overlapping portion 10bu. Thereby, since the main patterns 101 and 102 and the belt members 30 and 40 are not easily overlapped, the main patterns 101 and 102 are easily seen from the outside of the diaper 1, and the design of the diaper 1 can be improved.

Further, in the diaper 1, as long as the main pattern is provided on at least one of the front side (ventral side) and the rear side (back side) of the absorbent body 10, in particular, the back side main pattern is provided on the rear side. 102 is the expectation. In the state in which the infant wears the diaper 1, the rear main pattern 102 greatly affects the design of the diaper 1 because there are many chances of visually recognizing the rear main pattern 102. For example, when the infant wearing the diaper 1 is crawling as shown in Fig. 6, it is easy to visually recognize the rear main pattern 102 on the back side of the buttocks covering the infant, and it is easy to let the user (caregiver) together with the character to be drawn. Produce a lovely impression. Further, since the rear main pattern 102 is not easily overlapped with the rear side belt member 40 as described above, it is less likely to be shielded by the rear side belt member 40 and the visibility is deteriorated. Therefore, even if the infant is moving around At the same time, the rear main pattern 102 can also be clearly seen.

Further, as shown in FIG. 5B, the diaper 1 is provided with a rear main pattern 102 in a region of 80% or more of the rear side non-repetitive portion 10bd in the extended state. That is, the area of the rear main pattern 102 accounts for 80% or more of the area of the portion where the absorbent body 10 and the rear side belt member 40 are not overlapped. According to such a configuration, since the rear main pattern 102 is disposed in a wide area on the rear side surface (surface on the buttock side) of the absorbent body 10, it is easier to visualize when the infant is crawling in the state of wearing the diaper 1. The rear main pattern 102 (refer to FIG. 6).

Further, as shown in FIG. 5A and FIG. 5B, the rear main pattern 102 is provided at a position where the lower portion of the crotch portion is overlapped with the folding position C10 at a position where the absorbent body 10 is folded back and forth. That is, the rear main pattern 102 is disposed from the rear side surface of the absorbent body 10 beyond the folding position C10 across the front side (see FIG. 4), and a part of the rear main pattern 102 is also disposed on the front side of the absorbent body 10. . In this way, the rear main pattern 102 is provided in a wider range in the vertical direction of the diaper 1, and the wearing state of the diaper 1 is easily recognized from the buttocks of the wearer (infant) to the wide area under the armpit. Patterns, and even more design.

Further, in the diaper 1, the front main pattern 101 is provided on the front side surface of the absorbent body 10, but the rear main pattern 102 and the front main pattern 101 are different in size and arrangement. First, the arrangement of the main patterns 101 and 102 in the front and rear is such that the center position C101 in the vertical direction of the front main pattern 101 is higher than the center position C102 in the vertical direction of the rear main pattern 102. That is, in FIGS. 5A and 5B, the distance LC101 between the center position C101 and the folding position C10 of the front main pattern 101 is higher than the vertical direction between the center position C102 and the folding position C10 of the rear main pattern 102. Larger than LC102 (LC101>LC102).

When the diaper 1 is worn by the infant, the crotch portion (the lower portion in the up-and-down direction) of the front side of the absorbent body 10 is easily contracted in the widthwise direction (left-right direction) by the legs, and the front side is disposed near the lower portion. In the case of the main pattern 101, since the absorbent main body 10 is contracted, the front main pattern 101 is also shrunk toward the widthwise direction, which may become difficult to be visually recognized. On the other hand, such a problem as the rear side of the absorbent body 10 is less likely to occur, and conversely, by arranging the rear main pattern 102 in the vicinity of the lower portion, the pattern can be easily visualized as described above in the wide range of the wearer's buttocks. . Therefore, in the diaper 1, the front main pattern 101 is disposed at a position higher than the rear main pattern 102 in the vertical direction, whereby the main patterns 101 and 102 are visually recognized in the most appropriate state when worn.

Next, regarding the sizes of the front and rear main patterns 101 and 102, the front main pattern 101 is formed smaller than the size (area) of the main pattern 101 on the front side of the diaper 1 smaller than the size (area) of the rear main pattern 102. As described above, the front main pattern 101 is disposed at a position higher than the rear main pattern 102 in the vertical direction. Therefore, if the front main pattern 101 and the rear main pattern 102 are formed by the same size, the front main pattern 101 and the front side belt member 30 are easily overlapped, and the portion covered by the front side belt member 30 becomes large, and the portion is visually recognized. Concerns about sexual deterioration. Here, the front main pattern 101 is formed smaller than the rear main pattern 102, and the front main pattern 101 and the front side belt member 30 are not easily overlapped, and the visibility of the front main pattern 101 is suppressed from being deteriorated. On the other hand, since the rear side main pattern 102 can be largely formed, the visibility of the rear side main pattern 102 can be improved.

Further, in the diaper 1 of the present embodiment, the area of the portion where the rear main pattern 102 and the rear side belt member 40 overlap is smaller than the area of the portion where the front main pattern 101 and the front side belt member 30 overlap (see FIG. 5A, Figure 5B). When the wearer (infant child) crawls as shown in Fig. 6, the eye of the caregiver is likely to be noticed. Therefore, when the overlap with the rear side belt member 40 is large, the visibility is deteriorated easily. Become conspicuous. On the other hand, since the front main pattern 101 is disposed at a position that is invisible when the infant is crawling, the deterioration of the visibility due to the repetition of the front side belt member 30 is less conspicuous than that of the rear main pattern 102. Therefore, the area of the overlapping portion of the front side main pattern 101 and the front side belt member 30 is less likely to cause a problem even if the area of the overlapping portion of the rear side main pattern 102 and the rear side belt member 40 is larger. Thereby, deterioration of visibility of the entire diaper 1 can be suppressed.

However, since the rear side belt member 40 of the diaper 1 is formed thicker than the front side belt member 30 in the vertical direction, the wearer's buttocks can be widely covered (see FIGS. 5A and 5B). The rear main pattern 102 is easily overlapped with the rear side belt member 40. However, in the diaper 1 of the present embodiment, the area of the overlapping portion of the rear main pattern 102 and the rear side belt member 40 is minimized by adjusting the arrangement and size of the rear side main pattern 102 as described above. Thereby, both the good visibility of the rear main pattern 102 and the design of the diaper 1 can be improved.

However, the area of the overlapping portion of the rear side main pattern 102 and the rear side belt member 40 may be larger than the area of the overlapping portion of the front side main pattern 101 and the front side belt member 30. As described above, the front main pattern 101 has a small area, but in such a case, in order to ensure visibility, it is desirable that the front main pattern 101 and the front side belt member 30 are not overlapped. On the other hand, since the rear main pattern 102 is necessary to form the area to a certain extent from the viewpoint of design, there is a high possibility of having a region overlapping the rear side belt member 40. Therefore, when the front side main pattern 101 and the front side belt member 30 are not overlapped, the area of the overlapping portion of the rear side main pattern 102 and the rear side belt member 40 is larger than the area of the rear side main pattern 102 and the rear side belt member 40. Change to a smaller situation. With such a configuration, in addition to the rear main pattern 102, the visibility of the front main pattern 101 can be further improved.

Further, the rear main pattern 102 and the rear side belt member 40 may not be repeated. That is, the rear main pattern 102 may be disposed only on the rear side non-repetitive portion 10bd. However, since the upper limit of the size (area) of the rear main pattern 102 is limited by the size (area) of the rear side non-repeating portion 10bd, the design freedom of the rear main pattern 102 becomes low, and it is necessary to pay attention to it. There is a possibility of affecting the visibility of infants and young children when they crawl.

Further, in the diaper 1, it is desirable that the outline (width) of the outlines of the main patterns 101 and 102 is equal to or greater than a predetermined value (for example, 3 mm). When the outline is thin, when the main patterns 101 and 102 are overlapped with the belt members 30 and 40, there is a concern that the belt members 30 and 40 are shielded from view. On the other hand, if the outline is formed by a thickness of 3 mm or more, it is easy to recognize by transmitting a plurality of non-woven fabrics (15b; 31, 32; 41, 42, etc.) laminated on the main patterns 101 and 102. The shape of the main figures 101, 102. In addition, the "contour line" refers to a line of a shape in which a figure is formed with respect to a background (here, a leakage preventing sheet 15a as a medium to be printed). When the pattern is formed by the full application (for example, the portion of the panda's ear of Fig. 5A, etc.), it is conceivable that the entire application portion including the outer edge of the pattern is an outline.

Further, in the diaper 1, when the main patterns 101 and 102 are formed in the absorbent main body 10, the visibility of the main patterns 101 and 102 is further improved by changing the printing conditions in accordance with the area of the absorbent main body 10 (the leakage preventing sheet 15a).

For example, when the rear main pattern 102 is formed, the printing color tone value is changed and printed on the rear side overlapping portion 10bu and the rear side non-repeat portion 10bd. Specifically, the average of the printing tone values of the rear main pattern 102 formed in the region (the rear side overlapping portion 10bu) overlapping with the rear side belt member 40 is formed in an area that does not overlap with the rear side belt member 40 ( The average of the printed tone values of the rear side main pattern 102 of the rear side non-repeating portion 10bd) is printed higher. As a result, in the rear main pattern 102, the concentration in the portion overlapping with the rear side belt member 40 is likely to be more concentrated than the concentration in the portion where there is no repetition. When such a diaper 1 is viewed from the outside, a plurality of non-woven fabrics (15b, 41, 42) are laminated on the rear main pattern 102 at a portion overlapping with the rear side belt member 40 (back side repeating portion 10bu). The concentration of the rear side main pattern 102 is lighter than the image actually printed. On the other hand, in the portion (the rear side non-repeating portion 10bd) which is not overlapped with the rear side belt member 40, since the number of non-woven fabrics stacked on the rear side main pattern 102 is small, the rear side main pattern 102 is It looks like the same concentration as the actual printed image. Therefore, when the user views the diaper 1 from the outside, the rear side overlapping portion 10bu and the rear side non-repeat portion 10bd have the same image density, and good visibility can be achieved. The same applies to the front main pattern 101.

Similarly, when the rear main pattern 102 is formed, the brightness can be changed in the rear side repeating portion 10bu and the rear side non-overlapping portion 10bd. For example, the print data for printing the back side main pattern 102 is such that the brightness of the portion formed on the rear side repeating portion 10bu is reduced by a predetermined ratio only by the brightness of the portion formed on the rear side non-overlapping portion 10bd (for example, About 30%) is adjusted to perform printing. In this manner, the portion of the rear main pattern 102 that overlaps with the rear side belt member 40 (the rear side overlapping portion 10bu) is printed with an image that is darker than the portion that is not overlapped (the rear side non-repeating portion 10bd). At this time, when the rear side repeating portion 10bu is viewed through a plurality of white non-woven fabrics, the rear side main pattern 102 looks brighter than the actually printed image, and the rear side main pattern 102bd, the rear side main pattern 102 and the actual side. The printed image looks like the same brightness. Therefore, when the user views the diaper 1 from the outside, the rear side repeating portion 10bu and the rear side non-repeating portion 10bd have the same brightness as the image, and good visibility can be achieved. The same applies to the front main pattern 101.

In addition, when the back side repeating portion 10bu and the rear side non-repeat portion 10bd change the printing tone value and the brightness, the printing color tone and the brightness can be gradually changed from the upper side toward the lower side in the up and down direction. For example, in the rear main pattern 102, the printing color tone gradually becomes smaller as it goes from the upper end toward the lower end in the up and down direction. That is, an image having a level in which the lower side density becomes lighter is formed in the up and down direction. As described above, when the printing tone value is changed at the boundary portion between the rear side overlapping portion 10bu and the rear side non-repeat portion 10bd, when the bonding position between the absorbent body 10 and the belt members 30 and 40 is deviated in the manufacturing process of the diaper 1, Since the position of the boundary portion also deviates, there is a concern that the concentration of the main patterns 101 and 102 does not change abnormally at the boundary portion of the deviation. On the other hand, when the tone value is gradually changed, the density of the rear side overlapping portion 10bu is thick, and the image of the low density is formed on the rear side non-repeating portion 10bd. Therefore, good visibility is achieved. In the case where the positional deviation of the boundary portion between the rear side overlapping portion 10bu and the rear side non-repeat portion 10bd occurs, the unnatural concentration change in the vicinity of the boundary portion is less conspicuous, and deterioration of visibility is easily suppressed.

Moreover, in the diaper 1, the designability is improved by adjusting the size of the portion in which the absorbent body 10 and the front side belt member 30 and the rear side belt member 40 are respectively overlapped. In the example of FIG. 7 , the height in the up-and-down direction of the rear upper end 10eb of the absorbent body 10 is disposed at a position higher than the height in the vertical direction of the front upper end 10ea. That is, in the up and down direction, the distance between the front upper end 10ea of the absorbent body 10 and the folded position C10 is larger than the distance between the rear upper end 10eb and the folded position C10, so that the rear side of the absorbent body 10 is The area is larger than the area on the front side. If so, a large printable area can be obtained on the rear side, and the rear side main pattern 102 can be formed more freely. Thereby, the design as the entire diaper 1 can be improved.

Further, contrary to the case of FIG. 7, the height in the up-and-down direction of the rear upper end 10eb of the absorbent body 10 is the same as the height in the up-and-down direction of the front upper end 10ea, or may be disposed in the up-and-down direction with the front upper end 10ea. The height is configured at a lower position. At this time, the area of the front side surface of the absorbent body 10 becomes large, and the printable area in the front side surface becomes large. The area of the crotch side (the lower side in the up-and-down direction) of the front side is the leg of the wearer when the diaper 1 is worn, and the figure is difficult to visualize. Therefore, on the front side surface of the absorbent body 10, a region where the front main pattern 101 can be formed is widely provided on the waist opening side (upper side in the vertical direction), and the visibility of the front main pattern 101 is suppressed from being deteriorated when the diaper 1 is worn. The design of the diaper 1 can be improved.

Further, as shown in FIG. 7, the length of the indication portion 60 provided on the front side surface of the absorbent body 10 is longer than the length of the indication portion 60 provided on the rear side surface of the absorbent body 10. In the diaper 1, since the rear main pattern 102 is provided in the vicinity of the lower side (the lower side of the crotch side) in the vertical direction, if the indication portion 60 is disposed long on the rear side surface, the rear main pattern 102 and the indication portion 60 are provided. The repeating part tends to become larger. At this time, urination is performed when the diaper 1 is worn, and when the color of the indication portion 60 is changed, the visibility of the rear main pattern 102 may be deteriorated in the portion overlapping the instruction portion 60. In particular, when the wearer (infant child) crawls as shown in Fig. 6, the deterioration of visibility is conspicuous. Here, the length of the indication portion 60 in the rear side surface of the absorbent body 10 is made shorter than the length of the indication portion 60 in the rear side surface, and the rear main pattern 102 and the indication portion 60 are not easily overlapped, thereby suppressing The visibility of the side main pattern 102 is deteriorated.

Further, in the diaper 1, the area of the overlapping portion of the front side main pattern 101 and the indication portion 60 is larger than the area of the rear side main pattern 102 and the overlapping portion of the indication portion 60. As described above, when the overlapping area of the rear main pattern 102 and the indication portion 60 is increased, the deterioration of visibility is likely to be conspicuous. On the other hand, when the diaper 1 is worn, the front main pattern 101 is easily contracted in the left-right direction by being caught by the wearer's legs, and the front main pattern 101 is difficult to visualize when the infant crawls. Therefore, compared with the rear main pattern 102, the influence of the deterioration of visibility is small. In other words, even if the overlapping area of the front main pattern 101 and the indication portion 60 becomes large, the deterioration of the visibility of the main patterns 101 and 102 is not conspicuous.

Further, the indication portion 60 is provided only on the front side surface of the absorbent body 10, and may not be provided on the rear side surface. In this manner, the area of the overlapping portion of the indication portion 60 and the rear main pattern 102 can be minimized, and even if the color of the indication portion 60 is changed due to urination, the visibility of the rear main pattern 102 is less likely to deteriorate.

Furthermore, the indication unit 60 may be disposed without repeating the rear main pattern 102 and the indication unit 60. When the rear main pattern 102 and the indication portion 60 are not overlapped, even if the color of the indication portion 60 is changed due to urination, since the visibility of the rear main pattern 102 is less likely to be affected, it is easier to suppress the rear main pattern 102. The deterioration of visibility.

Further, a positioning mark 70 is printed on a predetermined area of the absorbent body 10. The positioning mark 70 is a mark indicating the reference position at the time of printing and processing the sheet member in the manufacturing process of the diaper 1. For example, a continuous sheet (not shown) in which the leakage preventing sheets 15a are belt-connected in the conveying direction is cut into the respective product lengths, and is used as a reference for the work of bonding the leakage preventing sheets 15a and the exterior sheets 15b. In the present embodiment, as shown in FIG. 5A, positioning marks 70 are provided on the upper left side of the front side surface of the absorbent body 10. Further, as shown in FIG. 5A, the positioning mark 70 is repeatedly overlapped with at least a part of the continuous portion of the waist elastic member 35 (that is, the portion of the waist elastic member 35 due to the tension) after the reverse operation. Configuration. The continuous portion of the waist elastic member 35 is a region that is contracted in the left-right direction when the diaper 1 is worn, and is repeatedly provided with the continuous portion, and the positioning mark 70 is also contracted in the left-right direction. That is, when the diaper 1 is worn, the positioning mark 70 is contracted in the left-right direction to be less conspicuous. Therefore, it is possible to suppress the deterioration of the visibility of the front main pattern 101 by the positioning mark 70. Further, the position at which the positioning mark 70 is disposed is not limited to the position shown in FIG. 5A, and may be disposed in the front side surface and the rear side surface of the absorbent body 10, and has an arbitrary position with respect to the overlapping portion of the waist elastic members 35, 45.

=== OTHER EMBODIMENT === The above embodiments of the present invention have been described above, but the above-described embodiments are intended to facilitate the understanding of the present invention and are not intended to limit the present invention. Further, the present invention can be modified and improved without departing from the meaning thereof, and it goes without saying that the present invention naturally includes equivalents thereof. For example, there may be such a deformation as shown below.

In the above-described embodiment, the materials of the exterior sheet 15b, the front side belt member 30, and the rear side belt member 40 are not woven, and are not limited to the nonwoven fabric. For example, it may be a woven fabric or a sheet member other than the woven fabric. In addition, the exterior sheet 15b may be omitted, and at this time, the leakage preventing sheet 15a is an exterior of the absorbent body 10.

In the above embodiment, the thread rubber is exemplified as the waist elastic member 35, and is not limited thereto. For example, a belt-shaped rubber may be used as the waist elastic member 35, or a stretchable belt-shaped nonwoven fabric or a stretchable belt-shaped resin film may be used.

1‧‧‧ diapers (absorbent articles)

1HB‧‧‧waist opening

1HL‧‧‧ leg opening

10‧‧‧Absorbable ontology

10ea‧‧‧ front side upper end

10eb‧‧‧upper upper end

10fu‧‧‧ front side repeat

10fd‧‧‧ front side non-repetition

10bu‧‧‧Back side repeat

10bd‧‧‧Back side non-repetition

11‧‧‧Absorbent core

11a‧‧‧ Ventral end

11b‧‧‧Back side

11c‧‧‧ narrowing

13‧‧‧Surface sheet member

15‧‧‧Inside sheet member

15a‧‧‧ leakproof sheet

15b‧‧‧Outer sheet

Section 15bf‧‧‧

17‧‧‧ leg elastic members

18‧‧‧LSG elastic members

19‧‧‧ leg support elastic members

30‧‧‧Front side belt members

30ea‧‧‧top

30ew‧‧‧Side edge joint

31‧‧‧ Non-woven

32‧‧‧ Non-woven

32f‧‧‧Front side fold

32feb‧‧‧Bottom

35‧‧‧Waist elastic member

37‧‧‧With component joints

37a, 37b‧‧‧ with component joints

38‧‧‧Sheet members

40‧‧‧Back side belt members

40ea‧‧‧ upper end

40ew‧‧‧Side edge joint

41‧‧‧Nonwoven

42‧‧‧Nonwoven

42f‧‧‧Back side fold

42feb‧‧‧Bottom

45‧‧‧Waist elastic member

47‧‧‧With component joints

47a, 47b‧‧‧ with component joints

48‧‧‧Sheet members

51‧‧‧ front joint

52‧‧‧Back side joint

60‧‧‧Instruction Department

70‧‧‧ Positioning Mark

101‧‧‧ front graphics

102‧‧‧Main graphics on the back side

C10‧‧‧Folding position

LG‧‧‧ leg hem

LSG‧‧‧Three-dimensional hem (leak-proof wall)

Fig. 1 is a schematic perspective view of the diaper 1 viewed from the front side. Fig. 2 is a schematic plan view of the diaper 1 which is unfolded and stretched as seen from the skin side. Fig. 3 is a schematic cross-sectional view taken along line A-A of Fig. 2; FIG. 4 is a view for explaining the configuration of the absorbent body 10. FIG. 5A is a view for explaining the arrangement of the front main pattern 101 in the front side surface of the diaper 1. FIG. 5B is a view for explaining the arrangement of the rear main pattern 102 in the rear side surface of the diaper 1. Fig. 6 is a view showing a state in which an infant wearing the diaper 1 crawls. Fig. 7 is a view for explaining a cross-sectional state of a diaper 1 of a pants type.

Claims (20)

An absorbent article having an up-and-down direction and a left-right direction and a front-rear direction intersecting each other, the absorbent body being disposed along the vertical direction and being folded forward and backward in the crotch portion; the front side belt member being along the foregoing The left side direction is provided, the front side is joined to the front upper end portion of the absorbent body in the up-and-down direction; and the rear side belt member is formed differently from the front side belt member and is disposed along the left-right direction. The rear side is joined to the rear upper end portion of the absorbent body in the vertical direction, and the absorbent article of the both end portions of the front side belt member and the both end portions of the rear side belt member are joined to each other in the left-right direction. The absorbent body includes a liquid-absorbent absorbent core and a liquid-impermeable leakage preventing sheet disposed on the non-skin side of the absorbent core, and at least one of the front side and the rear side. On the side, a main pattern is provided on the non-skin side of the aforementioned leakage preventing sheet, and the absorbent body is facing forward In the state in which the vertical direction and the horizontal direction are extended, the area of the main pattern is 40% or more of the area of the non-skin side surface on the one side, and the belt member on the one side is overlapped with the main pattern. The area is less than 50% of the area of the aforementioned main pattern. The absorbent article according to claim 1, wherein a rear main pattern is provided on the rear side of the absorbent body. The absorbent article according to claim 2, wherein the area of the rear main pattern is in a state in which the absorbent main body is stretched in the vertical direction and the horizontal direction, and the absorbent body is not in the aforementioned More than 80% of the area of the rear side belt member is repeated. The absorbent article according to claim 2, wherein the rear main pattern is repeated at a position of the lower portion of the crotch and the position of the absorbent body folded forward and backward. The absorbent article according to any one of claims 1 to 4, wherein a front side main pattern is provided on a front side of the absorbent body, and a rear main pattern is provided on a rear side of the absorbent body. In the vertical direction, the center position of the front main pattern is higher than the center position of the rear main pattern. The absorbent article according to claim 5, wherein the area of the front main pattern is smaller than the area of the rear main pattern. The absorbent article according to claim 5, wherein the area of the portion in which the rear side main pattern overlaps with the rear side belt member is larger than the area of the portion in which the front side main pattern overlaps with the front side belt member. smaller. The absorbent article according to claim 5, wherein the rear main pattern and the front side belt member are not overlapped. The absorbent article according to any one of the first aspect of the present invention, wherein the main pattern has an average of the printing tone values of the main pattern in a portion overlapping the one side surface of the absorbent body, The main pattern and the portion of the absorptive body that are not overlapped with each other on the one side of the absorptive body have an average of the print tonal values of the main pattern. The absorbent article according to claim 9, wherein the printing tone value of the main pattern gradually decreases from an upper side toward a lower side in the vertical direction. The absorbent article according to any one of the first aspect of the invention, wherein the main pattern has an average of brightness of the main pattern in a portion overlapping the one surface of the absorbent body, the main The average of the brightness of the main pattern in the portion where the pattern does not overlap with the surface on the one side of the absorbent body is smaller. The absorbent article according to any one of the items 1 to 11, wherein the outline of the outer shape forming the main pattern has a thickness of 3 mm or more. The absorbent article according to any one of claims 1 to 12, wherein the main pattern is the same pattern as the persona represented by the product packaging bag of the absorbent article. The absorbent article according to any one of claims 1 to 13, wherein the position of the upper end of the rear side of the absorbent body is higher than the position of the upper end of the front side of the absorbent body in the vertical direction. The absorbent article according to any one of claims 1 to 13, wherein the position of the upper end of the rear side of the absorbent body is the same as the position of the upper end of the front side of the absorbent body in the vertical direction, or The position of the upper end of the rear side of the absorbent body is lower than the position of the upper end of the front side of the absorbent body. The absorbent article according to any one of the first aspect of the present invention, wherein the absorbent body is provided with an instruction portion that changes color in contact with moisture in the vertical direction. In the direction, the length of the indication portion disposed on the front side of the absorbent body is longer than the length of the indication portion disposed on the rear side of the absorbent body. The absorbent article according to claim 16, wherein a front main pattern is provided on a front side of the absorbent body, and a rear main pattern is provided on a rear side of the absorbent body, and the front main pattern and the instruction are provided. The area of the portion where the portion is repeated is larger than the area of the portion where the rear main pattern and the aforementioned portion overlap. The absorbent article according to claim 16 or 17, wherein the indicator portion is not disposed on the rear side of the absorbent body. The absorbent article according to any one of claims 1 to 18, wherein the rear main pattern and the indicator portion are not overlapped. The absorbent article according to any one of the first aspect of the invention, wherein the absorbent body has a positioning mark that serves as a reference position at the time of processing the sheet member, and the front side belt member and the rear side belt member The waist elastic member that expands and contracts in the left-right direction has the positioning mark repeatedly disposed at least in part of a region in which the tension caused by the waist elastic member acts.