TWI788344B - absorbent article - Google Patents

Abstract

Provide an easily visible label on the absorbent body from the outside Absorbent articles with patterns and high design.

An absorbent article (1) having: The absorbent body (10) that is bent front and rear; the front side belt member (30) that is joined to the front upper end of the absorbent body (10) at the front; and the rear side that is joined to the rear of the absorbent body (10) at the rear The rear side belt member (40) of the side upper end portion, and the two ends of the front side belt member (30) and the two ends of the rear side belt member (40) are joined to each other in the left-right direction, and the absorbent main body (10) has The leak-proof sheet (15a) is provided with main graphics (101, 102) on the non-skin side of the leak-proof sheet (15a) on at least one side of the front side and the rear side, and in the state of stretching the absorbent main body (10), mainly The area of the graphics (101, 102) is more than 40% of the area of the non-skin side of the aforementioned one side, and the area of the portion where the belt member (30, 40) on one side overlaps with the main graphics (101, 102) is not greater than 40%. 50% of the area of the main figure (101, 102).

Description

absorbent article

This invention relates to absorbent articles.

Disposable diapers are known as absorbent articles for absorbing excrement. As one form of such disposable diapers, there is known a diaper in which a character, a pattern, etc. are marked on the non-skin side of an absorbent main body that absorbs excrement to improve design. For example, Patent Document 1 discloses that among the members constituting diapers, in the non-woven fabric forming the back sheet and the thread rubber forming the elastic member, by setting the content of titanium oxide to 5% by weight or less, the penetration of the thread rubber, Disposable diapers for the visibility of the pattern marked on the inside of the back sheet of the non-woven fabric.

[Prior Art Literature] [Patent Document]

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

However, the disposable diapers of Patent Document 1 have restrictions on the ingredients of the materials (the content of titanium oxide), so in the diapers There may be problems with its own functions and manufacturing costs. On the other hand, if the content of titanium oxide is not limited, the whiteness of the material becomes high, and it is difficult to recognize the pattern marked on the inside of the material from the outside (that is, the material is not easy to pass through), and there will be paper diapers. concerns about design deterioration. In particular, on the ventral side and the back side of the absorbent main body, the abdominal belt member and the back side belt member are respectively joined, and in the so-called three-member type disposable diaper, the absorbent main body and the belt member overlap each other. It is difficult to recognize the pattern from the outside, and the deterioration of the design is remarkable.

The present invention was developed in consideration of the above-mentioned problems, and an object thereof is to provide an absorbent article having a high designability and is easy to recognize the pattern marked on the absorbent main body from the outside.

The main invention for achieving the above objects is an absorbent article having vertical, lateral, and front-rear directions intersecting each other, and having: an absorbent main body disposed along the above-mentioned up-down direction, facing front and rear at the crotch portion be bent; the front side belt member, which is arranged along the aforementioned left-right direction, is joined to the non-skin side of the front side upper end portion of the aforementioned vertical direction of the aforementioned absorbent main body at the front side; and the rear side belt member, which is the same as the aforementioned The front side belt member is made into a different body, and is arranged along the aforementioned left-right direction, and is joined to the non-skin side of the rear side upper end portion of the aforementioned vertical direction of the aforementioned absorbent main body at the rear side, and the aforementioned front side belt member An absorbent article in which both ends of a member are joined to both ends of the rear side belt member, wherein the absorbent main body includes: a liquid-absorbent absorbent core; The liquid-impermeable leak-proof sheet on the non-skin side is provided on at least one of the front side and the rear side as the main leak-proof sheet on the non-skin side of the aforementioned leak-proof sheet. The pattern of the character to be figured, the aforementioned absorbent main body is stretched toward the above-mentioned up-down direction and the aforementioned left-right direction and has; the area of the pattern of the character as the main figure is the area of the aforementioned non-skin side of the aforementioned one side 40% or more of the area, and the area of the portion where the belt member on one side overlaps with the pattern of the character as the main figure is less than 50% of the area of the pattern of the character as the main figure, in the aforementioned The absorbent main body is provided along the up-down direction with an indicating part whose color changes due to contact with water, and in the up-down direction, the length ratio of the aforementioned indicating part arranged on the front side of the above-mentioned absorbent main body is arranged in the above-mentioned absorptive body. The length of the aforementioned indicating portion on the rear side of the main body is longer, the aforementioned indicating portion is arranged in the center of the aforementioned left-right direction, the front side main figure is provided on the front side of the aforementioned absorbent main body, and the rear side is provided on the rear side of the aforementioned absorbent main body. As for the main figure, in the up-down direction, the central position of the main figure on the front side is higher than the central position of the main figure on the rear side.

Other characteristics of the present invention will be apparent from the descriptions in this specification and the attached pages.

According to the present invention, it is possible to provide an absorbent article with high designability, in which the pattern displayed on the absorbent main body is easily recognized from the outside.

[Mode for Carrying Out the Invention]

From the description of this specification and the attached pages, at least the following matters are clear.

An absorbent article has up-down directions, left-right directions, and front-rear directions intersecting each other. The absorbent main body is arranged along the above-mentioned up-down directions and is bent forward and backward at the crotch part; the front side belt member is along the The aforementioned left-right direction is provided and joined to the front side upper end portion of the aforementioned vertical direction of the aforementioned absorbent main body at the front side; and the rear side belt member is made different from the aforementioned front side belt member and is provided along the aforementioned left-right direction, And it is joined to the rear side upper end portion of the aforementioned vertical direction of the aforementioned absorbent main body at the rear side, and in the aforementioned left-right direction, the two ends of the aforementioned front side belt member and the two ends of the aforementioned rear side band member are mutually joined. An article characterized in that the absorbent main body includes: a liquid-absorbent absorbent core; On one side, a main pattern is provided on the non-skin side of the leak-proof sheet, and the aforesaid absorbent main body is stretched in the aforementioned up-down direction and the aforementioned left-right direction, and the area of the aforementioned main pattern is equal to that of the aforementioned non-skin side on the one side. 40% or more of the area, and the area of the portion where the belt member on one side overlaps with the main figure is less than 50% of the area of the main figure.

According to such an absorbent article, the main pattern can be easily arranged in a region that does not overlap with the belt member in the absorbent main body. Thereby, since the main pattern and the belt member do not easily overlap, the main pattern can be easily seen 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 graphic on the rear side of the absorbent main body.

According to such an absorbent article, when a wearer such as an infant crawls while wearing the absorbent article, the rear main pattern can be easily seen on the rear side of the absorbent main body covering the infant's buttocks.

In such an absorbent article, in a state where the absorbent main body is stretched in the vertical direction and the left-right direction, the area of the rear main pattern is such that there is no overlapping region of the absorbent main body with the rear side belt member. More than 80% is expected.

According to such an absorbent article, since there is no wide area overlapping with the rear side belt member in the rear side of the absorbent main body, the rear side main pattern is provided, so the state of wearing the absorbent article by a wearer such as an infant When crawling down, it is easier to see the main graphics on the rear side.

In such an absorbent article, it is desirable for the rear main pattern to overlap at the positions of the crotch portion and the absorbent main body folded forward and backward.

According to such an absorbent article, the back side main figure is provided to the lower side (the crotch side) of the vertical direction of the absorbent article, and in the wearing state of the absorbent article, the buttocks of the wearer (infant) to the The wide area under the crotch is easy to recognize the pattern, which further enhances the design.

In such an absorbent article, the front main graphic is provided on the front side of the absorbent main body, the rear main graphic is provided on the rear side of the absorbent main body, and the central position of the front main graphic is lower than the rear main graphic in the vertical direction. A higher central position of the side main graphics is desirable.

According to such an absorbent article, since the front main graphic is provided at a high position, it is easy to suppress that the front main graphic is pinched between the wearer's legs and shrinks when worn. On the other hand, by providing the rear main figure at a low position, the rear main figure can be easily seen in a wide range of the wearer's buttocks. Therefore, it is easy to see each front and rear main figure in the optimum state.

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

According to such an absorbent article, since the front main graphic is formed smaller than the rear main graphic, it is difficult to overlap the front main graphic and the front belt member, and deterioration of visibility of the front main graphic can be suppressed. On the other hand, since the rear main figure can be formed greatly, the visibility of the rear main figure can be improved.

In such an absorbent article, it is desirable that the area of the portion where the rear main pattern overlaps with the rear belt member is smaller than the area of the portion where the front main pattern overlaps with the front belt member.

According to such an absorbent article, the overlapping portion of the rear main graphic and the rear belt member becomes small, and the visibility of the rear main graphic is less likely to deteriorate. On the other hand, since the main figure on the front side is arranged at a position (ventral side) that is not easy to see when the wearer (such as an infant) crawls, even if the part where the main figure on the front side overlaps with the front side belt member is large, the degree of visibility cannot be improved. The deterioration is also not conspicuous. Therefore, deterioration of visibility as an absorbent article as a whole can be suppressed.

In such an absorbent article, it is desirable that the aforementioned front side main pattern does not overlap with the aforementioned front side belt member.

According to such an absorbent article, it is possible to suppress the front side main graphic from being hidden by the front side belt member. Therefore, the visibility of the main figure on the front side becomes good, and the design property of an absorbent article can be further improved.

In such an absorbent article, the average of the printed tone values of the main graphic in the portion where the main graphic overlaps with the one side surface of the absorbent main body is different from that of the one side surface of the absorbent main body. It is desirable that the average of the aforementioned printed tone values of the aforementioned main patterns in the repeated portion be larger.

According to such an absorbent article, when viewed from the outside, at the portion where the main graphic overlaps with the belt member, the density of the main graphic appears lighter than the actually printed image. On the other hand, in the portion where the main pattern and the tape member do not overlap, the density of the main pattern appears to be equivalent to that of the actually printed image. Therefore, it is possible to suppress a situation where the density of the main pattern appears to change rapidly at a portion that does not overlap with a portion that overlaps with the belt member. Thereby, good visibility can be realized.

In such an absorbent article, it is desirable that the color tone value of the printing of the main graphic gradually decreases from the upper side toward the lower side in the vertical direction.

According to such an absorbent article, the density of the graphic becomes thicker in the area where the main graphic overlaps with the belt member (overlapping portion), and the density of the graphic becomes lighter in the area where the main graphic and the belt member do not overlap (non-overlapping portion). tendency. Furthermore, even if the position of the boundary between the overlapping portion and the non-overlapping portion deviates, unnatural density changes near the boundary become inconspicuous, and deterioration of visibility can be easily suppressed.

In such an absorbent article, the average of the brightness of the main figure in the portion where the main figure overlaps with the one side surface of the absorbent main body does not overlap with the one side surface of the absorbent main body. It is desirable that the average of the brightness of the aforementioned main figures in the section be smaller.

According to such an absorbent article, when viewed from the outside, at the portion where the main graphic overlaps with the belt member, the brightness of the main graphic appears higher than that of the actually printed image. On the other hand, in the part where the main pattern and the tape member do not overlap, the main pattern having the same brightness as the actually printed image can be seen. Therefore, it is possible to suppress a situation where the luminance of the main pattern appears to change rapidly at a portion that does not overlap with a portion that overlaps with the band member. Thereby, good visibility can be realized.

In such an absorbent article, it is desirable that the thickness of the outline forming the outline of the aforementioned main figure be 3 mm or more.

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

In such an absorbent article, it is desirable that the main pattern is the same pattern as the character displayed on the packaging bag of the absorbent article.

According to such an absorbent article, infants and their caregivers can easily recognize the main figure, and also easily understand the relationship between the absorbent article and the main figure.

In such an absorbent article, it is desirable that the position of the rear upper end of the absorbent main body be higher than the position of the front upper end of the absorbent main body in the vertical direction.

According to such an absorbent article, since the area of the rear side of the absorbent main body is larger than the area of the front side, the area where the main graphic can be printed is enlarged on the rear side. Therefore, the main figure on the rear side can be designed more freely. Thereby, the designability of an absorbent article can be improved.

In such an absorbent article, in the vertical direction, the position of the rear upper end of the absorbent body is the same as the position of the front upper end of the absorbent body, or the position of the rear upper end of the absorbent body is lower than the position of the absorbent body. It is desirable that the position of the front upper end of the body be lower.

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

In such an absorbent article, the absorbent main body is provided along the vertical direction with an indicator portion whose color changes due to contact with moisture, and the indicator portion is disposed on the front side of the absorbent main body in the vertical direction. It is desirable that the length is longer than the length of the indicator portion arranged on the rear side of the absorbent main body.

According to such an absorbent article, since the back side main figure and the indication part are less likely to overlap, even when the color of the indication part changes, deterioration of the visibility of the back side main figure can be easily suppressed.

In such an absorbent article, the front main graphic is provided on the front side of the absorbent main body, the rear main graphic is provided on the rear side of the absorbent main body, and the area of the overlapping portion of the front main graphic and the indicator portion is larger than that of the aforementioned It is desirable that the area of the portion where the main figure on the rear side overlaps with the aforementioned indicator portion is larger.

According to such an absorbent article, since the overlapping area of the rear main graphic and the indicator is small, the visibility of the rear main graphic is less likely to deteriorate even when the color of the indicator changes. On the other hand, although the area of the overlapped part of the front side main figure and the indicator portion becomes larger, since the front side main figure and the rear side main figure are less visible, the deterioration of the visibility is less likely to occur in the absorbent article as a whole. become conspicuous.

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

According to such an absorbent article, since the overlapping area of the indicating portion and the rear main graphic can be minimized, deterioration of visibility of the rear main graphic can be more easily suppressed even when the color of the indicating portion changes.

In such an absorbent article, it is desirable that the said rear main figure and the said indication part do not overlap.

According to such an absorbent article, even when the color of the indicator part changes, since the visibility of the rear main graphic is less likely to be affected, deterioration of the visibility of the rear main graphic can be further easily suppressed.

In such an absorbent article, the absorbent main body has positioning marks that serve as reference positions when processing the sheet member, the front side belt member and the rear side belt member have waist elastic members that expand and contract in the left and right directions, and the positioning It is desired that the marking is repeated with at least a part of the region where tension by the aforementioned waist elastic member acts.

According to such an absorbent article, by providing the positioning mark, the absorbent main body can be accurately processed in the manufacturing process of the absorbent article. Furthermore, when the absorbent article is worn, the positioning marks are also contracted due to the contraction of the waist elastic members, so the positioning marks become inconspicuous. Thereby, deterioration of visibility of main graphics can be suppressed.

===Embodiment=== <Structure of Disposable Diapers> As an example of the absorbent article of the embodiment, disposable diapers 1 (hereinafter, also referred to as It will be described only as "diaper 1"). FIG. 1 is a schematic perspective view of a diaper 1 viewed from the front side. Fig. 2 is a schematic plan view of the unfolded and stretched diaper 1 viewed from the skin side. FIG. 3 is a schematic cross-sectional view showing the A-A cross-section in FIG. 2 . FIG. 4 is a diagram illustrating the structure of the absorbent main body 10 . In addition, the "extended state" in Fig. 2 refers to the state where the product (diaper 1) is stretched until there are no wrinkles. etc.) to a state where the size of the component is the same as or close to this length.

The diaper 1 has three directions perpendicular to each other, the up-down direction, the left-right direction, and the front-rear direction in the pants-type state of FIG. 1 . In addition, hereinafter, the upper side in the vertical direction in the pants-shaped state is also referred to as the "waist opening side", and the lower side in the vertical direction is also referred to as the "crotch side". In addition, the front side in the front-rear direction is also called "ventral side", and the back side is also called "dorsal side".

On the other hand, in the unfolded state of FIG. 2 , the diaper 1 has the longitudinal direction and the widthwise direction as three directions perpendicular to each other. In addition, below, the one side and the other side of the longitudinal direction in this expanded state are also called "abdominal side" and "dorsal side", respectively. In addition, the above-mentioned widthwise direction in the unfolded state is the same direction as the above-mentioned left-right direction in the pants-type state. Therefore, the widthwise direction is also referred to as "left-right direction" below. In addition, the longitudinal direction in the unfolded state is a direction along the vertical direction in the pants-shaped state. Also, as shown in FIG. 3, the direction perpendicular to the up-down direction (longitudinal direction) and the left-right direction (broadside direction) is referred to as the "thickness direction", and the side in contact with the skin of the wearer is referred to as the "skin direction". side", and the opposite side as the "non-skin side".

As shown in FIG. 1 , the paper diaper 1 is a so-called three-member type and has three parts 10 , 30 , and 40 . That is, the diaper 1 has an absorbent main body 10 that abuts on the wearer's crotch to absorb excrement such as urine as a first component, and has a front side belt that covers the abdomen from the wearer's front side. The member 30 has as the second part, and the rear side belt member 40 which covers the back part from the back side of the wearer as the third part.

As shown in Figure 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 (upper and lower direction) of the absorbent main body 10. laid between such. And, the front side upper end portion including the front side 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 to the rear side belt member 40 to make its appearance The shape forms a substantially H shape when viewed from above.

Then, from this state, the absorbent main body 10 is folded in half at the folding position C10 in the longitudinal direction. That is, it is folded forward and backward at the crotch portion. In this folded state, the front side belt member 30 and the rear side belt member 40 facing each other, if the side edge joint portion 30ew and the side edge joint portion 40ew (also known as the side edge joint portion 40ew) must abut against the wearer's flank, That is, both ends in the left-right direction) are joined and connected, and these belt members 30, 40 can be formed into a ring shape. Thereby, the paper diaper 1 in the worn state in which the waist opening 1HB and the pair of leg openings 1HL are formed as shown in FIG. 1 is obtained.

(Absorptive main body 10) The absorbent main body 10 has the function of absorbing excreta such as urine, and as shown in FIG. 2 and FIG. center in the left-right direction. The absorbent main body 10 is provided with: an absorbent core 11, a surface sheet member 13 covering the absorbent core 11 from the skin side, and an outer covering of the absorbent main body 10 by covering the absorbent core 11 from the non-skin side. The inner sheet member 15.

The absorbent core 11 is a member in which liquid absorbent materials are laminated, and can absorb excrement such as urine. As the liquid-absorbent material, for example, liquid-absorbent fibers such as pulp fibers can be used. In addition, the absorbent core 11 may contain, for example, a superabsorbent polymer in the form of liquid-absorbent particulates, or may contain liquid-absorbent materials other than liquid-absorbent fibers and liquid-absorbent particulates. In addition, the absorptive core 11 may be covered with a liquid-permeable sheet (not shown) such as tissue paper.

The absorptive core 11 of this embodiment has the front end part 11a which is the upper side end part of an up-down direction in FIG.2 and FIG. And between the front end part 11a and the rear side end part 11b, there exists the constricted part 11c whose width|variety in the left-right direction is narrower than the front side end part 11a and the rear side end part 11b. Thereby, the absorptive core 11 is comprised in the substantially hourglass shape seen in planar view as shown in FIG.2 and FIG.4.

The surface sheet member 13 is a sheet-shaped member covering the absorbent core 11 from the skin side, for example, a liquid-permeable nonwoven fabric having a larger planar size than the absorbent core 11 . Also, the back sheet member 15 is a sheet-shaped member that covers the absorbent core 11 from the non-skin side, and is a sheet with a larger planar size than the absorbent core 11. As an example, polyethylene or polyester is bonded. A sheet of two-layer structure consisting of a liquid-impermeable leak-proof sheet 15a such as acrylic and an exterior sheet 15b such as nonwoven fabric.

In addition, in the diaper 1, as shown in FIG. 4, so-called three-dimensional frills LSG and leg frills LG are formed by the exterior sheet 15b. The three-dimensional frill LSG is a leak-proof wall portion that is erected at each end of the surface sheet member 13 in the left-right direction. On the other hand, the leg frill LG is formed on each leg opening of the diaper 1. 1HL, 1HL leg circumference expansion and contraction part. The exterior sheet 15b has a portion 15bf extending in the left-right direction from both sides of the leak-proof sheet 15a in the left-right direction, and the portion 15bf is folded toward the center side in the left-right direction with the left-right end of the absorbent main body 10 as the folding position. , and the leg circumference elastic members 17 such as thread rubber and the leg circumference auxiliary elastic members 19 are fixed in a state of being stretched in the vertical direction in the vicinity of the folded position, whereby the above-mentioned leg circumference hem LG is formed. . In addition, the leg circumference auxiliary elastic member 19 is not absolutely necessary, and the leg circumference hem LG may be formed only by the leg circumference elastic member 17.

The folded portion 15bf further extends to the center side in the left-right direction, covers the end portions in the left-right direction of the surface sheet member 13 , and is joined to the surface sheet member 13 at both ends in the vertical direction. Furthermore, the portion 15bf is folded toward both outer sides in the left-right direction, and at its front end, an LSG elastic member 18 such as thread rubber is fixed in a state of being stretched in the vertical direction. When the LSG elastic member 18 contracts in the vertical direction, the absorptive main body 10 is bent in the vertical direction so that the surface sheet member 13 side becomes the inner peripheral side. When the absorbent main body 10 is bent, the front end portion of the portion 15bf is contracted vertically by the contraction force applied from the LSG elastic member 18 to stand up from the surface sheet member 13 and function as a three-dimensional hem LSG.

In addition, in some cases, a liquid-permeable sheet such as tissue 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 ) as Second flake.

A predetermined pattern is provided on the non-skin side of the leak-proof sheet 15a of the absorbent main body 10 . In the example of FIG. 4 , panda characters (main figures 101 and 102 described later) are printed as an example of patterns. This pattern is provided so that it can be seen 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 patterns (main figures 101 and 102 ) are also visible from the skin side of the absorbent main body 10 (inside of the diaper 1 ) for explanation. Hereinafter, printed patterns are also referred to as "graphics". Details about the size and arrangement of figures will be described later.

On the other hand, on the skin side of the anti-leakage sheet 15a of the absorbent main body 10, an indicator 60 serving as an index for notifying the user of the diaper 1 (for example, a caregiver of an infant) of the amount of liquid absorbed such as urine is provided. The indication part 60 is shown by the area|region surrounded by the dotted line of FIG. The indicator portion 60 is formed of a substance (ink) that changes color when it comes into contact with moisture. When the absorbed urine comes into contact with the indicator 60, the color changes. Therefore, the user (the caregiver of the infant) can easily grasp the changing time of the diaper 1 by visually recognizing the change of the color of the indicator portion 60 from the outside of the diaper 1 .

(Belt members 30, 40) Both the front side belt member 30 and the rear side belt member 40 are sheet members having a substantially rectangular shape in plan view, for example, made of a soft sheet such as nonwoven fabric as a material (see FIG. 2 ).

The front side belt member 30, as shown in FIG. 3, can be formed by overlapping two sheets of nonwoven fabrics 31 and 32 in the thickness direction and joining them together. And between the nonwoven fabrics 31 and 32 of two sheets, several waist elastic members 35, 35..., such as thread rubber, are arrange|positioned along the left-right direction. The waist elastic members 35, 35... are interposed and arranged in the vertical direction while being spaced apart in the vertical direction, and are joined and fixed to the nonwoven fabrics 31, 32 while being stretched in the left and right directions. Thereby, the belt member 30 becomes stretchable in the left-right direction at the front side. In addition, the nonwoven fabrics 31 and 32 are bonded to each other via a tape member bonding portion 37 formed of an adhesive such as a hot-melt adhesive. The belt member joint part 37 is formed, for example, in the range of the belt member joint parts 37a and 37b shown by the dotted part in FIG. Provides flexibility in the left and right directions. However, the range and size of forming the belt member joining portion 37 are not limited thereto.

In this embodiment, at least a part of the waist elastic member 35 has a discontinuous part in the center part 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 position in the center 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 a pair of belt member joining portions 37b, 37b formed on both sides in the left-right direction. Then, the waist elastic member 35 starts shrinking from the cut portion (cut end) toward the belt member joining portions 37b on both sides in the left and right direction, and stops shrinking at the left and right inner end of the belt member joining portion 37b. This action is also called "reverse action" of the elastic member. In this embodiment, the waist elastic member 35 is not attached to the area between the belt member joining portions 37b, 37b in the left-right direction (or it may be joined with weak adhesive force so that no stretching force acts). Therefore, when the waist elastic member 35 reverses, the nonwoven fabrics 31 and 32 constituting the front belt member 30 do not shrink, and only the waist elastic member 35 shrinks 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, the discontinuous part of the waist elastic member 35 is formed in the center part of the left-right direction on the front side (abdominal side) of the diaper 1. As shown in FIG. In this discontinuous part, with respect to the absorbent main body 10 (absorbent core 11), the shrinkage force in the left-right direction is less likely to act, and the absorbent main body 10 (absorbent core 11) is easy to widen toward the left-right direction, so it can effectively Suppress side leakage of excrement, etc.

Also, on the upper side (waist opening side) of the front side belt member 30 in the vertical direction, the non-woven fabric 32 on the non-skin side protrudes more upward than the longitudinal upper end of the non-woven fabric 31 on the skin side, and the protruding part is folded toward the skin side to form a front folded portion. 32f, the front folded portion 32f is engaged and fixed on the skin side of the nonwoven fabric 31 (see FIG. 3 ). Thereby, by covering the upper end 30ea of the front side belt member 30 with the front side folded portion 32f, when the diaper 1 is worn, the edge of the upper end 30ea is less likely to get caught in the wearer's skin (abdomen side waistline), which can hardly cause wear. uncomfortable feeling.

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

The rear belt member 40 has substantially the same structure as the front belt member 30 . That is, the rear side belt member 40 is formed by overlapping two pieces of non-woven fabrics 41, 42 in the thickness direction and joining them, and the belt member joining portion 47 (the belt member in FIG. The joining parts 47a and 47b) are joined and fixed in a state where the plurality of waist elastic members 45, 45, such as thread rubber, are stretched in the left-right direction. Thereby, stretchability in the left-right direction is imparted to the rear side belt member 40 . Also, at least a part of the waist elastic member 45 is cut at the central portion in the left-right direction similarly to the waist elastic member 35 and reversed to form a discontinuous portion. Therefore, even in the discontinuous part on the rear side (back side), since the shrinkage force toward the left and right directions is not easy to act on the absorbent main body 10 (absorbent core 11), the absorbent main body 10 (absorbent core 11) is easy to move toward the left and right. The direction is widened, so side leakage of excrement and the like can be effectively suppressed.

Also, on the upper side (waist opening side) of the rear side belt member 40 in the vertical direction, the non-skin side non-woven fabric 42 protrudes more upward than the upper end of the skin-side non-woven fabric 41 in the vertical direction, and the protruding part is folded toward the skin side and formed. Side folded portion 42f.

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

Moreover, in FIG. 3, the sheet member 38 which covers the front upper end 10ea of the absorptive main body 10, and the lower end 32feb of the front folded part 32f from the skin side is provided. With this 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 be caught in the wearer's skin, and discomfort during wearing is less likely to occur. Similarly, a sheet member 48 covering the rear upper end 10eb of the absorbent main body 10 and the lower end 42feb of the rear folded portion 42f from the skin side is provided. With this 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 be caught in the wearer's skin, and discomfort during wearing is less likely to occur. However, in the diaper 1, the sheet members 38 and 48 are not necessarily provided.

<Description of Graphics> The graphics on the non-skin side of the leak-proof sheet 15a provided on the absorbent main body 10 will be described. The pattern is formed in the manufacturing process of the diaper 1 by, for example, printing the leak-proof sheet 15a using a general printing device such as an inkjet printer.

On the non-skin side of the leak-proof sheet 15a, various graphics such as illustrations, photographs, patterns, and letters can be formed. That is, patterns of various designs can be printed in terms of shape, color, size, arrangement, and the like. In the example of FIG. 4, although the character of a panda is printed, other graphics (for example, patterns, etc.) may be printed in addition to this character.

In this embodiment, among the graphics printed on the non-skin side of the leak-proof sheet 15a, the graphics that satisfy predetermined conditions are referred to as "main graphics". Specifically, the "main graphic" is a graphic printed on the non-skin side of the leak-proof sheet 15a, and refers to the front side or the rear side in the state where the absorbent body 10 is extended in the up-down direction and left-right direction. On at least one side, graphics printed on 40% or more of the area are displayed. In addition, the "front side" refers to the surface on the front side when the absorbent main body 10 is folded in half at the folding position C10, and in FIG. . Similarly, the "rear side" refers to the surface on the rear side when the absorbent main body 10 is folded in half at the folding position C10. In FIG. .

In the example of FIG. 4 , a front side main figure 101 formed of a panda character holding a balloon is formed on the front side of the absorbent main body 10 (leakage-proof sheet 15a). On the other hand, on the back side of the absorbent main body 10 (leak-proof sheet 15a), there is formed a back side main figure 102 formed by the characters of the parent-child panda. However, the main figure does not necessarily have to be formed on both the front side and the rear side, since the main figure may be formed only on one side (preferably the rear side).

Such main graphics occupy an area of more than 40% of the front side or rear side of the absorbent main body 10. Since they are the most eye-catching graphics when the diaper 1 is worn, it is easy for infants and their caregivers. It is desirable to recognize such patterns of personas. Moreover, since it is easier to recognize the relationship with the diaper 1, it is more desirable that the main figure be the same character as the character drawn on the packaging bag when the diaper 1 is distributed in the market.

Also, the main figure may be a pattern in which a plurality of patterns gather to form a gathered pattern. For example, although the front main figure 101 shown in Fig. 4 is a pattern of a red panda riding a cloud and holding two balloons, the "cloud", "little panda" and "balloon" are surrounded by continuous lines locked area. In this case, not only the "little panda" as a character, but also "clouds" and "balloons" become the main graphic elements. The size above % is enough. For example, when overlapping with a certain character to form a background, text, etc., these elements are gathered together to form the main figure. In addition, the outline of the main figure does not necessarily have to be a closed area, and a part of the outline may be broken halfway. For example, in the main figure 101 on the front side of FIG. 4, even if a part of the outline of the "cloud" is cut off, the user can recognize it as a grouped pattern just by looking at it, and the "cloud" also becomes the main figure. elements.

In addition, the rear main figure 102 shown in FIG. 4 is a pattern in which giant pandas and small pandas are arranged side by side. At this time, the closed closed area is formed by the continuous line of "big panda" and "small panda", and the main figure is composed of two characters. Furthermore, the combined area of the two characters only needs to be 40% or more of the rear side of the absorbent main body 10 . In addition, when the main figure 102 on the rear side contains a plurality of human characters (in FIG. 4 , pandas) as components of the main figure, the plurality of characters are arranged in a row in the left-right direction (the direction of the width of the absorbent main body 10). Roles are expected. Also, even if a plurality of human characters are arranged at separate positions, if the plurality of human characters are in a grouped pattern, the plurality of human characters constitute the main figure. For example, in the main graphic 102 on the rear side, it can be understood that it is a series of "parent-child pandas" arranged with "big pandas" and "small pandas". Therefore, assuming that the "big panda" and the "small panda" are arranged separately from each other, these two characters constitute the rear main figure 102 .

Here, an example of a method of calculating the ratio (%) of the area of the main figure to the area of the front side (or back side) of the absorbent main body 10 will be described. First, the paper diaper to be calculated for the area is extended in the up-down direction and the left-right direction, and the front side and the back side of the absorbent main body 10 are photographed using a commercially available camera. Then, let the scanner read the captured image and obtain the read data. The read data is pixel data arranged in two dimensions according to the resolution read by the scanner, and each pixel data is multi-stage tone value ( Hereinafter, the read tone value) means density (print density). The larger the read tone value shown in the pixel data, the thicker the printing density, and the smaller the read tone value, the lighter the printing density. In addition, the read tone value indicated by the pixel data can also be represented by, for example, brightness or L* value (brightness).

Next, edge extraction processing of main graphics is performed on the read data. In the edge extraction process, a well-known filter such as a Laplacian filter or a Sobel filter is applied, and pixels forming the outline of the main figure are extracted and binarized. As a result, the tone values of the pixels forming the outline of the main figure are represented by the maximum tone (255), and the tone values of other pixels are represented by the minimum tone (0). As mentioned above, since the main figure is a closed area surrounded by substantially continuous lines, it can be accurately measured by calculating the area enclosed by the outline pixels extracted from the read data. The area of the main figure. Also, when the outline of the main figure is broken, it is sufficient to calculate the area of the main figure by forming and adding a virtual outline to the read data. Similarly, the area of the front side (back side) of the absorbent main body 10 is also measured from the read data, whereby the ratio (%) of the area of the main figure to the front side (back side) can be calculated. Of course, the ratio (%) of the area of the main figure can also be calculated by other methods.

<About the Arrangement of Main Graphics> The diaper 1 improves the visibility of the graphic and the overall design of the diaper by adjusting the arrangement and size of the main graphics on the front side and rear side of the absorbent main body 10 . Hereinafter, a specific arrangement of main graphics will be described. FIG. 5A is a diagram illustrating the arrangement of the front main graphic 101 on the front side of the diaper 1 . FIG. 5B is a diagram illustrating the arrangement of the rear main graphic 102 on the rear side of the diaper 1 . In FIG. 5A and FIG. 5B , the state (stretched state) after the underpants-shaped paper diaper 1 is stretched in the vertical direction and the left-right direction is shown. FIG. 6 is a diagram showing how an infant wearing the diaper 1 crawls. Fig. 7 is a diagram illustrating a cross-sectional state of the paper diaper 1 in the underpants type form.

As shown in FIG. 5A , the front side of the absorptive main body 10 is on the upper side (waist opening side) in the vertical direction, and a part of the area overlaps with the front side belt member 30 . On the front side surface of the absorptive main body 10, let the part which overlaps with the front side belt member 30 be the front side overlapping part 10fu, and let the part which does not overlap be the front side non-overlapping part 10fd. Moreover, as shown in FIG. 5B , the rear side of the absorbent main body 10 is on the upper side (waist opening side) in the vertical direction, and a part of the region overlaps with the rear side belt member 40 . On the rear side surface of the absorbent main body 10, the part overlapping with the rear side belt member 40 is made into the back side overlapping part 10bu, and the part which does not overlap is made into the back side non-overlapping part 10bd.

In the present embodiment, the front main graphic 101 is arranged such that the area of the overlapping portion of the front main graphic 101 and the front belt member 30 is less than 50% of the area of the front main graphic 101 . In other words, more than 50% of the area of the front main pattern 101 is arranged in the front non-overlapping portion 10fd. Similarly, the area where the rear main figure 102 overlaps with the rear belt member 40 is less than 50% of the area of the rear main figure 102, and more than 50% of the area of the rear main figure 102 is arranged in the non-overlapping portion of the rear 10bd.

In the front side overlapping portion 10fu and the rear side overlapping portion 10bu, since the belt members 30, 40 are superimposed on the main patterns 101, 102, it is difficult to see in this area compared with the front side non-overlapping portion 10fd and the rear side non-overlapping portion 10bd. Primary graphics 101, 102. Here, in this embodiment, the main patterns 101 and 102 are arranged more easily in the front non-overlapping portion 10fd and the rear non-overlapping portion 10bd than in the front overlapping portion 10fu and the rear overlapping portion 10bu. Thereby, since the main figures 101, 102 and the belt members 30, 40 are not easy to overlap, the main figures 101, 102 are easily recognized from the outside of the diaper 1, and the design of the diaper 1 can be improved.

In addition, in the diaper 1, it is only necessary to provide the main figure on at least one of the front side (abdomen side) and the back side (back side) of the absorbent main body 10, especially, the back side main figure is provided on the back side. 102 is expected. This is when infants and toddlers are wearing the diaper 1, since there are many opportunities to recognize the main graphic 102 on the rear side, the main graphic 102 on the rear side will have a greater impact on the diaper 1. The design has a great influence. For example, when an infant wearing diaper 1 is crawling as shown in Figure 6, the rear main figure 102 is easy to see and recognize on the rear side covering the infant's buttocks, and it is easy for the user (caregiver) Makes a cute impression. Moreover, the rear side main pattern 102 is difficult to overlap with the rear side belt member 40 because it is set as mentioned above, so it is difficult to produce the problem of being covered by the rear side belt member 40 to deteriorate the visibility, so even if the infant moves around , the rear main graphic 102 can also be clearly recognized.

Furthermore, in the diaper 1, as shown in FIG. 5B, the rear main pattern 102 is provided in an area of more than 80% of the rear non-overlapping portion 10bd in the stretched state. That is, the area of the rear main pattern 102 accounts for more than 80% of the area of the portion where the absorbent main body 10 and the rear belt member 40 do not overlap. According to such a structure, since the rear side main figure 102 is arranged in a wide area of the rear side (buttocks side) of the absorbent main body 10, it is easier to see when crawling while the infant is wearing the diaper 1. The rear main figure 102 (refer to FIG. 6 ).

Also, as shown in FIGS. 5A and 5B , the rear main pattern 102 is provided at the crotch portion at a position overlapping with the folding position C10 at which the absorbent main body 10 is folded forward and backward. That is, the rear side main figure 102 is arranged from the rear side of the absorbent main body 10 beyond the folded position C10 crotch front side (refer to FIG. 4 ), and a part of the rear side main figure 102 is also provided on the front side of the absorbent main body 10. . Thereby, the rear side main figure 102 is provided in a wider range in the vertical direction of the diaper 1, and in the wearing state of the diaper 1, the wide area from the wearer's (infant) buttocks to the crotch can be easily recognized. picture case, but also enhance the design.

Also, in the diaper 1, although the front main figure 101 is provided on the front side of the absorbent main body 10, the size and arrangement of the rear main figure 102 and the front main figure 101 are different. First, regarding the arrangement of the front and rear main graphics 101 and 102 , the central position C101 in the vertical direction of the front main graphic 101 is higher than the central position C102 in the vertical direction of the rear main graphic 102 . That is, in FIG. 5A and FIG. 5B, the vertical distance LC101 between the central position C101 of the front main figure 101 and the folded position C10 is larger than the vertical distance between the central position C102 of the rear main figure 102 and the folded position C10. The distance to LC102 is greater (LC101>LC102).

When an infant wears the diaper 1, the crotch part (the lower part in the vertical direction) on the front side of the absorbent main body 10 tends to shrink in the direction of the width (left and right direction) because it is sandwiched between the legs, and the front side is arranged near the crotch part. In the case of the main figure 101, since the absorptive main body 10 shrinks, the main figure 101 on the front side also shrinks in the direction of the width, which may become difficult to be recognized. On the other hand, such a problem is less likely to occur on the rear side of the absorbent main body 10. On the contrary, by arranging the rear main pattern 102 near the crotch portion, the pattern can be easily recognized in a wide range of the wearer's buttocks as described above. . Therefore, in the diaper 1, the front main graphic 101 is arranged at a higher position than the rear main graphic 102 in the vertical direction, whereby each main graphic 101, 102 is visually recognized in an optimum state when worn.

Next, regarding the sizes of the front and rear main graphics 101, 102, the size (area) of the front main graphics 101 of the diaper 1 is larger than that of the rear main graphics. The front side main figure 101 is formed so that the size (area) of the figure 102 is smaller. As described above, the front main graphic 101 is arranged at a higher position than the rear main graphic 102 in the vertical direction. Therefore, if the front side main figure 101 and the rear side main figure 102 are formed by the size of the same degree, the front side main figure 101 and the front side belt member 30 are easy to overlap, and the part covered by the front side belt member 30 becomes larger, and there will be no visual recognition. Concerns about sexual aggravation. Here, the front main graphic 101 is formed smaller than the rear main graphic 102 so that the front main graphic 101 and the front belt member 30 are less likely to overlap, thereby preventing deterioration of the visibility of the front main graphic 101 . On the other hand, since the rear main graphic 102 can be formed greatly, the visibility of the rear main graphic 102 can be improved.

Also, in the diaper 1 of the present embodiment, the area of the overlapping portion of the rear main figure 102 and the rear belt member 40 is smaller than the area of the overlapping portion of the front main figure 101 and the front belt member 30 (refer to FIG. 5A, Figure 5B). The rear side main figure 102 is as shown in Figure 6. When the wearer (infant) crawls, it is easy to attract the attention of the caregiver's eyes, so if the overlap with the rear side belt member 40 is large, the deterioration of visibility is easy. become conspicuous. On the other hand, since the front side main pattern 101 is arranged at a position where it cannot be seen when the infant is crawling, compared with the rear side main pattern 102, the degradation of visibility due to overlapping with the front side belt member 30 is less conspicuous. Therefore, even if the area of the overlapping portion of the front main pattern 101 and the front belt member 30 is larger than the area of the overlapping portion of the rear main pattern 102 and the rear belt member 40, problems are less likely to occur. Thereby, deterioration of the visibility of the diaper 1 as a whole can be suppressed.

However, the rear side belt member 40 of the paper diaper 1 is thicker than the front side belt member 30 because the width in the vertical direction is formed thicker, and can widely cover the wearer's buttocks (refer to Fig. 5A, Fig. 5B), so originally The rear main pattern 102 is easily repeated with the rear belt member 40 . However, in the diaper 1 of the present embodiment, the area of the overlapping portion of the rear main graphic 102 and the rear belt member 40 is minimized as much as possible by adjusting the arrangement and size of the rear main graphic 102 as described above. Thereby, good visibility of the rear main graphic 102 can be ensured, and the design of the diaper 1 can be improved.

However, the area of the overlapping portion of the rear main pattern 102 and the rear belt member 40 may be larger than the area of the overlapping portion of the front main pattern 101 and the front belt member 30 . As mentioned above, although the front side main pattern 101 may be formed with a small area, it is desirable that the front side main pattern 101 and the front side belt member 30 not overlap in such a case in order to ensure visibility. On the other hand, the rear main pattern 102 is likely to have a region overlapping with the rear belt member 40 because it needs to be formed with a somewhat large area from the viewpoint of design. Therefore, when the front main figure 101 does not overlap with the front belt member 30, the area of the overlapping part of the rear main figure 102 and the rear belt member 40 is larger than the area of the overlapping part of the rear main figure 102 and the rear belt member 40. becomes smaller. With such a structure, in addition to the rear main graphic 102, the visibility of the front main graphic 101 can be further improved.

In addition, the rear main pattern 102 and the rear belt member 40 may not overlap. That is, the rear main pattern 102 may be arranged only in the rear non-overlapping portion 10bd. However, because the upper limit of the size (area) of the rear main figure 102 is limited by the size (area) of the rear non-overlapping portion 10bd, the degree of freedom in the design of the rear main figure 102 becomes low, and care should be taken. There is a possibility that it may affect the visibility of infants and young children when crawling.

Also, in the diaper 1, it is desirable that the thickness (width) of the outlines of the main figures 101 and 102 be greater than or equal to a predetermined value (for example, 3 mm). If the outline is thin, the main figures 101, 102 may overlap with the belt members 30, 40, and may be hidden by the belt members 30, 40 and may not be easily seen. On the other hand, if the contour line is formed with a thickness of 3mm or more, it can be easily recognized through a plurality of non-woven fabrics (15b; 31, 32; 41, 42, etc.) laminated on the main pattern 101, 102. The shape of the main graphics 101,102. In addition, the "contour line" refers to the case where the outline of the figure is formed with respect to the background (here, the leak-proof sheet 15a which is the medium to be printed). When the figure is formed by smearing all over (for example, the part of the panda's ear in FIG. 5A ), it may be considered that the whole smearing part including the outer edge of the figure may be an outline.

Also, in the diaper 1, when the main graphics 101, 102 are formed on the absorbent main body 10, the visibility of the main graphics 101, 102 is further improved by changing the printing conditions according to the area of the absorbent main body 10 (leak-proof sheet 15a).

For example, when forming the back side main pattern 102, the back side overlapping portion 10bu and the back side non-overlapping portion 10bd are printed while changing the printing tone value. Specifically, the average of the printing tone values of the rear main pattern 102 formed in the region overlapping with the rear belt member 40 (the rear overlapping portion 10bu) is formed in a region not overlapping with the rear belt member 40 ( The average of the printing tone values of the rear side main pattern 102 in the rear side non-overlapping portion 10bd) is printed higher. As a result, in the rear main pattern 102, the density in the overlapping portion with the rear belt member 40 tends to become thicker than the density in the non-overlapping portion. 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 the portion overlapping the rear belt member 40 (rear overlapping portion 10bu), so that The density of the rear main pattern 102 appears lighter than the actually printed image. On the other hand, in the part that does not overlap with the rear side belt member 40 (the rear side non-overlapping portion 10bd), because the number of non-woven fabrics laminated on the rear side main pattern 102 is small, the rear side main pattern 102 Appears to have the same density as the actual printed image. Therefore, when the user recognizes the diaper 1 from the outside, the density of the image appears to be the same in the rear overlapping portion 10bu and the rear non-overlapping portion 10bd, and good visibility can be achieved. The same applies to the front main pattern 101 .

Similarly, when forming the rear main pattern 102, the brightness of the rear overlapping portion 10bu and the rear non-overlapping portion 10bd may be changed. For example, the print data for printing the rear main pattern 102 is such that the luminance of the portion formed in the rear overlapping portion 10bu is reduced by a predetermined ratio compared to the brightness of the portion formed in the rear non-overlapping portion 10bd (for example, About 30%) to adjust to perform printing. In this way, a darker image is printed on the part of the rear main pattern 102 overlapping with the rear belt member 40 (the rear overlapping part 10bu) than the part not overlapping (the rear non-overlapping part 10bd). At this time, when the rear side repeating portion 10bu is viewed through a plurality of white non-woven fabrics, the rear main graphic 102 appears brighter than the actual printed image, and the rear main graphic 102 is different from the actual printed image in the rear non-repeating portion 10bd. The printed image appears to be of equal brightness. Therefore, when the user recognizes the diaper 1 from the outside, the brightness of the image appears to be the same in the rear overlapping portion 10bu and the rear non-overlapping portion 10bd, and good visibility can be achieved. The same applies to the front main pattern 101 .

In addition, when the rear overlapping portion 10bu and the rear non-overlapping portion 10bd change the printing tone value and brightness, the printing hue and brightness may be gradually changed from the upper side toward the lower side in the vertical direction. For example, in the rear main pattern 102, the printing tone gradually decreases from the upper end toward the lower end in the vertical direction. That is, in the vertical direction, an image having a gradation whose density becomes lighter toward the lower side is formed. As described above, if the printing tone value is changed at the boundary between the rear overlapping portion 10bu and the rear non-overlapping portion 10bd, when the joining position of the absorbent main body 10 and the belt members 30, 40 deviates during the manufacturing process of the diaper 1, Since the position of the boundary part is also deviated, there is a possibility that the density of the main patterns 101 and 102 may change abnormally at the deviated boundary part. On the other hand, if the tone value changes gradually, overall, an image with high density will be formed in the rear overlapping portion 10bu and a light density image will be formed in the rear non-overlapping portion 10bd, so good visibility can be achieved. Therefore, even if a positional deviation occurs at the boundary between the rear overlapping portion 10bu and the rear non-overlapping portion 10bd, unnatural density changes near the boundary are less conspicuous, and deterioration of visibility can be easily suppressed.

Moreover, in the diaper 1, designability is improved by adjusting the size of the portion where the absorbent main body 10 overlaps with the front side belt member 30 and the rear side belt member 40 respectively. In the example of FIG. 7 , the vertical height of the rear upper end 10eb of the absorbent main body 10 is arranged at a higher position than the vertical height of the front upper end 10ea. That is, in the vertical direction, the distance between the front upper end 10ea of the absorbent main body 10 and the folded position C10 is greater than the distance between the rear upper end 10eb and the folded position C10, so that the rear side of the absorbent main body 10 is larger. The area is larger than that of the front side. In this way, a large printable area can be obtained on the rear side, and the rear main pattern 102 can be formed more freely and easily. Thereby, the design property of the diaper 1 as a whole can be improved.

Also, contrary to the situation in FIG. 7 , the height in the vertical direction of the rear upper end 10eb of the absorbent main body 10 is the same as the height in the vertical direction of the front upper end 10ea, or may be arranged at a height in the vertical direction of the front upper end 10ea. The height is configured at a lower position. At this time, the area of the front side of the absorbent main body 10 becomes larger, and the printable area on the front side becomes larger. The area on the crotch side (the lower side in the vertical direction) of the front side is caught between the legs of the wearer when the diaper 1 is worn, so that the graphic becomes difficult to see. Therefore, on the front side of the absorbent main body 10, an area where the front main graphic 101 can be formed is widely provided on the waist opening side (upper side in the vertical direction), and the deterioration of the visibility of the front main graphic 101 is suppressed when the diaper 1 is worn. , the design of the diaper 1 can be improved.

Moreover, as shown in FIG. 7 , the length of the indicator 60 provided on the front side of the absorbent main body 10 is longer than the length of the indicator 60 provided on the rear side of the absorbent main body 10 . In the diaper 1, since the rear main figure 102 is set near the lower side (the crotch side) in the up and down direction, if the indicator part 60 is arranged long on the rear side, the distance between the rear main figure 102 and the indicator part 60 will be reduced. Duplicates tend to get large. At this time, when the diaper 1 is worn and urination is performed, if the color of the indicating portion 60 changes, the visibility of the rear main graphic 102 may deteriorate at the portion overlapping with the indicating portion 60 . In particular, when the wearer (infant) crawls as shown in FIG. 6 , deterioration of visibility tends to be conspicuous. Here, the length of the indicator portion 60 in the back side of the absorbent main body 10 is made shorter than the length of the indicator portion 60 in the back side, so that the rear main graphic 102 and the indicator portion 60 are not easy to overlap, so as to suppress the The visibility of the side main graphic 102 deteriorates.

Furthermore, in the diaper 1, the overlapping area of the front main graphic 101 and the indicator 60 is larger than the overlapping area of the rear main graphic 102 and the indicator 60 . As described above, if the overlapping area between the rear main graphic 102 and the indicator 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 figure 101 tends to shrink in the left and right directions by being sandwiched by the wearer's legs, and the front main figure 101 is difficult to see when the infant is crawling. Therefore, compared with the rear main graphic 102, the influence of deterioration of visibility is small. That is, even if the overlapping area of the front side main figure 101 and the indication part 60 becomes large, the degradation of the visibility of the main figure 101,102 is less conspicuous with respect to the diaper 1 as a whole.

In addition, the indicator part 60 may be provided only in the front side of the absorptive main body 10, and may not be provided in the back side. In this way, the overlapping area of the indicating portion 60 and the rear main graphic 102 can be minimized, and the visibility of the rear main graphic 102 is less likely to deteriorate even when the color of the indicating portion 60 changes due to urination.

In addition, the indication part 60 may be arrange|positioned so that the rear main figure 102 may not overlap with the indication part 60. If the backside main figure 102 does not overlap with the indicator part 60, even when the color of the indicator part 60 changes due to urination, because the visibility of the backside main figure 102 is not easily affected, it is further easy to suppress the rear side main figure 102. deterioration of visibility.

In addition, a positioning mark 70 is printed on a predetermined area of the absorbent main body 10 . The positioning mark 70 is a mark indicating a reference position when printing and processing the sheet member in the manufacturing process of the diaper 1 . For example, a continuous sheet (not shown) in which the leak-proof sheet 15a is connected in a belt shape in the conveying direction is cut into respective product lengths, and is used as a reference in the process of laminating the leak-proof sheet 15a and the exterior sheet 15b. In this embodiment, as shown in FIG. 5A , a positioning mark 70 is provided on the upper left side of the front side of the absorbent main body 10 . And, as shown in FIG. 5A , the positioning mark 70 is overlapped with at least a part of the continuous portion of the waist elastic member 35 after performing the reverse operation (that is, the portion where the tension caused by the waist elastic member 35 acts). configuration. The continuous portion of the waist elastic member 35 is a region that shrinks in the left-right direction when the diaper 1 is worn, and by overlapping with this continuous portion, the positioning mark 70 also shrinks in the left-right direction. That is, when the diaper 1 is worn, the positioning mark 70 shrinks in the left-right direction and becomes less conspicuous. Therefore, deterioration of the visibility of the front main pattern 101 can be suppressed by the positioning mark 70 . In addition, the position where the positioning mark 70 is arranged is not limited to the position shown in FIG.

===Other Embodiments=== In the above, the embodiments of the present invention have been described, but the above-mentioned embodiments are intended to facilitate the understanding of the present invention, and are not intended to limit the present invention. In addition, the present invention can be changed and improved without departing from the meaning thereof, and it goes without saying that the present invention also includes equivalents thereof. For example, such variations as shown below are possible.

In the above-mentioned embodiment, although the materials of the exterior sheet 15b, the front side belt member 30, and the rear side belt member 40 were respectively made of nonwoven fabrics, they are not limited to nonwoven fabrics at all. For example, a woven cloth may be used, or a sheet member other than a woven cloth may be used. In addition, the exterior sheet 15b may be omitted, and in this case, the leak-proof sheet 15a serves as the exterior of the absorbent main body 10 .

In the above-mentioned embodiment, although thread rubber is illustrated as the waist elastic member 35, it is not limited to this at all. For example, belt-shaped rubber may be used as the waist elastic member 35, and a stretchable belt-shaped nonwoven fabric or a stretchable belt-shaped resin film may be used.

1‧‧‧diaper (absorbent article) 1HB‧‧‧waist opening 1HL‧‧‧leg opening 10‧‧‧absorbent body 10ea‧‧‧front upper end 10eb‧‧rear upper end 10fu‧‧‧front repeating part 10fd‧‧‧Front side non-overlapping part 10bu‧‧‧Rear side overlapping part 10bd‧‧‧Back side non-overlapping part 11‧‧‧Absorbent core 11a‧‧‧Ventral side end part 11b‧‧‧Back side end part 11c‧ ‧‧Narrowed part 13‧‧‧Surface sheet member 15‧‧‧Inner sheet member 15a‧‧‧Leak-proof sheet 15b‧‧‧Outer sheet 15bf‧‧‧Part 17‧‧‧Leg circumference elastic member 18‧‧‧ LSG elastic member 19‧‧‧leg circumference auxiliary elastic member 30‧‧‧front side belt member 30ea‧‧‧upper end 30ew‧‧‧side edge joint part 31‧‧‧non-woven fabric 32‧‧‧non-woven fabric 32f‧‧‧front folded part 32 feb‧‧‧lower end 35‧‧‧waist elastic member 37‧‧‧belt member joining portion 37a, 37b‧‧‧belt member joining portion 38‧‧‧sheet member 40‧‧‧rear side belt member 40ea‧‧‧upper end 40ew ‧‧‧Side edge joining part 41‧‧‧Non-woven fabric 42‧‧‧Non-woven fabric 42f‧‧‧Front folded part 42feb‧‧‧Lower end 45‧‧‧Waist circumference elastic member 47‧‧‧Belt member joining part 47a, 47b‧ ‧‧Joint part 48 of belt member‧‧‧Sheet member 51‧‧‧Front side joint part 52‧‧‧Rear side joint part 60‧‧‧Indication part 70 Rear main figure C10‧‧‧folding position LG‧‧‧leg hem LSG‧‧‧three-dimensional hem (leakage wall)

[ Fig. 1 ] A schematic perspective view of the diaper 1 viewed from the front side.

[ Fig. 2 ] A schematic plan view of the unfolded and stretched diaper 1 viewed from the skin side.

[ Fig. 3 ] A schematic cross-sectional view shown along the A-A cross-section in Fig. 2 .

[ FIG. 4 ] A diagram illustrating the structure of the absorbent main body 10 .

[FIG. 5] FIG. 5A is a figure explaining the arrangement|positioning of the front side main pattern 101 in the front side of the diaper 1. [FIG. FIG. 5B is a diagram illustrating the arrangement of the rear main graphic 102 on the rear side of the diaper 1 .

[ Fig. 6] Fig. 6 is a diagram showing how an infant wearing the diaper 1 crawls.

[FIG. 7] It is a figure explaining the cross-sectional state of the paper diaper 1 of an underpants type form.

10: Absorbent body

10bd: Non-repetitive part on the back side

10bu: Posterior repeat

10fd: non-repetitive front side

10fu; anterior repeat

11: Absorbent core

30: front side belt member

35: waist elastic member

40: with components

45: waist elastic member

60: instruction department

70: positioning mark

101: Front side main graphics

102: Rear main graphics

C10: Folded position

C101: Central position in the up and down direction

C102: Central position in the up and down direction

LC101: Distance in the up and down direction

LC102: Distance in the up and down direction

Claims (18)

An absorbent article having vertical, horizontal, and front-rear directions intersecting each other, and comprising: an absorbent main body disposed along the vertical direction and bent forward and backward at the crotch portion; a front side belt member having It is arranged along the left-right direction and is joined to the non-skin side of the front upper end portion of the absorbent main body in the vertical direction on the front side; and the rear side belt member is made different from the front side belt member, and The above-mentioned left-right direction is arranged, and the non-skin side of the rear upper end portion of the above-mentioned up-down direction of the above-mentioned absorbent main body is joined at the rear side, and the two ends of the aforementioned front side belt member are connected to the aforementioned rear side in the above-mentioned left-right direction. An absorbent article in which both ends of a belt member are joined together, wherein the absorbent main body includes a liquid-absorbent absorbent core and a liquid-impermeable absorbent core disposed on the non-skin side of the absorbent core. The leak-proof sheet is provided with a character pattern as a main figure on at least one of the front side and the back side of the leak-proof sheet on the non-skin side of the leak-proof sheet, and the absorbent main body is elongated in the above-mentioned up-down direction and the above-mentioned left-right direction. In this state, the area of the pattern of the character as the main figure is more than 40% of the area of the non-skin side of the one side, and the belt member on the one side overlaps with the pattern of the character as the main figure The area of the part is less than the person as the aforementioned main figure 50% of the area of the pattern of the object character, on the above-mentioned absorbent main body, an indicator part that changes color due to contact with moisture is provided along the above-mentioned vertical direction, and is arranged on the front side of the above-mentioned absorbent main body in the above-mentioned vertical direction. The length of the indication portion is longer than the length of the indication portion disposed on the rear side of the absorbent main body, the indication portion is arranged in the center of the left-right direction, and the front main figure is provided on the front side of the absorbent main body, The rear side main figure is provided on the back side of the aforementioned absorbent main body, and the central position of the aforementioned front side main figure is higher than the central position of the aforementioned rear side main figure in the aforementioned vertical direction. The absorbent article described in claim 1, wherein the rear main graphic is provided on the rear side of the absorbent main body. The absorbent article described in claim 2, wherein, in the state where the absorbent main body is stretched in the vertical direction and the left-right direction, the area of the main pattern on the rear side is the area of the absorbent main body that is not different from the above-mentioned More than 80% of the area where the posterior strap members repeat. The absorbent article described in claim 2 or claim 3, wherein the rear main pattern is formed between the crotch part and the The position of the absorbent body is repeated. The absorbent article described in any one of claims 1 to 3 of the patent claims, wherein the area of the front main graphic is smaller than the area of the rear main graphic. The absorbent article described in any one of claims 1 to 3 of the claimed claims, wherein the area of the overlapping portion of the rear main figure and the rear belt member is larger than the area of the overlapping portion of the front main figure and the front belt member area is smaller. The absorbent article described in any one of claims 1 to 3 of the patent claims, wherein the rear main pattern does not overlap with the front belt member. The absorbent article described in any one of claims 1 to 3 of the claimed claims, wherein the average ratio of the printed tone value of the main graphic in the portion where the main graphic overlaps with the surface of the one side of the absorbent main body The average of the printing tone value of the said main figure in the part which does not overlap with the said one side surface of the said absorptive body is larger. The absorbent article according to claim 8, wherein the printing tone value of the main graphic gradually decreases from the upper side toward the lower side in the vertical direction. The absorbent article described in any one of claims 1 to 3 of the claimed claims, wherein the average brightness of the main graphic in the portion where the main graphic overlaps with the surface on one side of the absorbent main body is greater than that of the main graphic. The average brightness of the main graphic is smaller in the portion where the graphic does not overlap with the surface on one side of the absorbent main body. The absorbent article described in any one of claims 1 to 3 of the claimed claims, wherein the thickness of the outline forming the outline of the aforementioned main figure is 3 mm or more. The absorbent article described in any one of claims 1 to 3 of the patent claims, wherein the pattern of the character as the main figure is the same pattern as the character represented by the product packaging bag of the absorbent article. The absorbent article described in any one of claims 1 to 3 of the claimed claims, wherein, in the vertical direction, the position of the rear upper end of the absorbent main body is The position is higher than the front upper end of the aforementioned absorbent main body. The absorbent article described in any one of claims 1 to 3 of the patent claims, wherein, in the vertical direction, the position of the rear upper end of the absorbent main body is the same as the position of the front upper end of the absorbent main body, or The position of the rear upper end of the aforementioned absorbent body is lower than the position of the front upper end of the aforementioned absorbent body. The absorbent article described in any one of claims 1 to 3 of the patent claims, wherein the front main graphic is provided on the front side of the absorbent main body, and the main rear graphic is provided on the rear side of the absorbent main body. The area where the front main figure overlaps with the indication portion is larger than the area where the rear main figure overlaps with the indication portion. The absorbent article described in any one of claims 1 to 3 of the claimed claims, wherein the indication unit is not disposed on the rear side of the absorbent main body. The absorbent article described in claim 15, wherein the main figure on the rear side does not overlap with the indicating portion. Absorbents described in any one of items 1 to 3 of the scope of application product, wherein the absorbent main body has positioning marks serving as reference positions when processing the sheet member, the front side belt member and the rear side belt member have waist elastic members that expand and contract in the left and right directions, and the positioning marks are At least a part of the region where tension acts by the aforementioned waist elastic member is arranged so as to overlap.

Images