TWI785034B - absorbent article - Google Patents

Abstract

In absorbent articles with graphics, it is not easy for the user to The strength of the member creates anxiety.

Absorbent article (1) has: It is bent forward and backward in the crotch part The folded absorbent body (10), the front side belt member (30) that is joined to the front upper end of the absorbent body (10) at the front side, and the rear upper end that is joined to the absorbent body (10) at the rear The rear side belt member (40) of the front side belt member (40) is joined to the two ends of the front side belt member (30) and the two ends of the rear side belt member (40) in the left and right direction, wherein the absorbent main body (10) is equipped with a leak-proof sheet (15a), on at least one side of the front side and the rear side, main graphics (101, 102) are provided on the non-skin side of the leak-proof sheet (15a), and in the state of stretching the absorbent main body (10), the main 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 part where the belt member (30, 40) on one side overlaps with the main figure (101, 102) is the main figure ( 101, 102) more than 50% of the area.

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, in the disposable diaper of Patent Document 1, since the composition of the material (the content of titanium oxide) is limited, the whiteness of the nonwoven fabric may appear low, or the nonwoven fabric itself may appear thin. Such diapers may cause users (those who wear diapers, such as caregivers of infants) to worry about whether the nonwoven fabric will be torn or damaged during use. In particular, in a so-called three-member disposable diaper in which the front side belt member is joined to the front side of the absorbent main body and the rear side belt member is joined to the rear side of the absorbent main body, the belt member covering the waist of the wearer is as follows: It looks thin, and the anxiety about the strength increases, and there is a concern that you cannot use disposable diapers with peace of mind.

The present invention was developed in view of the above-mentioned problems, and its object is to make it difficult for the user to feel uneasy about the strength of the belt member in an absorbent article having a pattern.

The main inventions used to achieve the above objects are

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, The rear side is joined to the rear upper end portion of the aforementioned vertical direction of the aforementioned absorbent main body, and in the aforementioned left-right direction, the two ends of the aforementioned front side belt member An absorbent article in which both ends of the rear side belt member are joined to each other, wherein the absorbent main body includes: a liquid-absorbent absorbent core; The liquid-impermeable anti-leakage sheet is provided with main graphics on at least one of the front side and the back side, on the non-skin side of the anti-leakage sheet, and the absorbent main body is stretched in the above-mentioned up-down direction and the above-mentioned left-right direction , the area of the aforementioned main figure is more than 40% of the area of the aforementioned non-skin side on the aforementioned one side, and the area of the overlapping part of the belt member on the aforementioned one side and the aforementioned main figure is 50% of the area of the aforementioned main figure above.

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

According to the present invention, in an absorbent article having a pattern, it is difficult for the user to feel uneasy about the strength of the belt member.

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 the main figure is 50% or more of the area of the main figure.

According to such an absorbent article, in the region where the main figure overlaps with the belt member, the visibility of the main figure falls, and the color looks pale or the outline looks blurred. Thereby, a user can easily recognize the thickness (thickness) of a belt member, and it can suppress that a user feels uneasy about the strength of a belt member.

In such an absorbent article, the main pattern is arranged as desired across the boundary between the area where the absorbent main body overlaps with the belt member on one side and the area where the absorbent main body does not overlap with the belt member on one side. .

According to such an absorbent article, the main figure appears clearly in the region that does not overlap with the belt member, whereas the visibility of the main figure appears to be lowered in the region that overlaps with the belt member. Therefore, the difference in visibility between the part that overlaps with the belt member and the part that does not overlap in the main figure becomes clear, and the thickness of the belt member can be recognized more easily. Thereby, it becomes easy to suppress user's uneasiness.

In such an absorbent article, the front side belt member and the rear side belt member each have a skin-side nonwoven fabric and a non-skin side nonwoven fabric, and the skin-side nonwoven fabric and the non-skin side nonwoven fabric are overlapped in the thickness direction via the belt member junction. It is desirable that at least a part of the main pattern does not overlap with the area where the belt member joint is provided.

According to such an absorbent article, when the belt member shrinks in the left-right direction when the absorbent article is worn, the skin-side nonwoven fabric and the non-skin-side nonwoven fabric may float in the thickness direction in the region where the belt member joining portion is not provided. . In this way, the floating part of the nonwoven fabric is repeatedly configured with the main figure (that is, the main figure has a part that does not overlap with the joint of the belt member), so the visibility of the main figure is further reduced, so that it is easier for the user to recognize the belt. The thickness of the component.

In such an absorbent article, the absorbent body has an exterior sheet on the non-skin side of the leak-proof sheet, and the basis weight of the nonwoven fabric forming the front side belt member and the rear side belt member is greater than that of the nonwoven fabric forming the exterior sheet. The basis weight is greater as desired.

According to such an absorbent article, since the basis weight of the nonwoven fabric of the exterior sheet is small, the light transmittance is high, and since the basis weight of the nonwoven fabric of the belt member is heavy, the light transmittance becomes low. Thereby, in the area where the absorbent body and the belt member do not overlap, the main graphics are easy to see through, and in the area where the absorbent body and the belt member overlap, the main graphic is not easy to see. Therefore, the user can more easily recognize the thickness of the belt member.

In such an absorbent article, the front side belt member and the rear side belt member each have a waist elastic member that expands and contracts in the left and right directions, and at least a part of the main pattern overlaps with a region where tension acts on the waist elastic member. for expectations.

According to such an absorbent article, when the absorbent article is worn, the surface of the belt member is deformed into a bellows shape having a plurality of wrinkles due to expansion and contraction of the waist elastic member. Therefore, the visibility of the main pattern is lowered at the portion overlapping the region where the wrinkles are formed, and the user can easily recognize the thickness and softness of the belt member.

In such an absorbent article, the front side belt member and the aforementioned rear side belt member are respectively connected to the absorbent body through a plurality of belt-shaped joints along the up-down direction and body joints arranged at predetermined intervals in the left-right direction. For permanent body joints, it is desirable that at least a part of the aforementioned main figure is repeated with the area where the aforementioned body joints are provided.

According to such an absorbent article, when the absorbent article is worn, the belt member and the absorbent main body are separated from each other between the two adjacent belt-shaped joining portions in the left-right direction and are easily floated in the thickness direction. In this raised area, since the visibility of the main pattern is greatly reduced, it is easier to recognize the thickness and softness of the belt member.

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 the wearer (infant, etc.) crawls while wearing the absorbent article, the eyes of the user (caregiver, etc.) It is easy to notice the main graphics on the rear side. Therefore, it is also easy to recognize that a difference in visibility occurs in the part overlapping with the rear side belt member and the part not overlapping in the rear main pattern.

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 and shrunk by the wearer's legs 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 front and rear main figures in each optimal 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, by forming the main figure on the rear side as large as possible, the visibility of the main figure on the rear side as a whole is improved, and the user can easily recognize the part that overlaps with the rear side belt member and the part that does not overlap. A part may produce poor visibility.

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

According to such an absorbent article, since the main pattern on the rear side is easy to attract the attention of the user's eyes when the wearer crawls, so by increasing the overlapping portion with the rear side belt member as much as possible, the overlapping portion The degree of visibility reduction of the main graphic on the rear side of the car tends to become conspicuous. Therefore, the user can easily recognize the thickness of the belt member.

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 surface on the one side of the absorbent main body, and the difference between the main graphic and the one side of the absorbent main body It is desirable that the average of the aforementioned printed tone values of the aforementioned main patterns in the portion where the surfaces do not overlap is equal.

According to such an absorbent article, the concentration of the printed main pattern is the same level in the portion overlapping with the belt member and in the portion not overlapping. When such an absorbent article is viewed from the outside, at the portion overlapping with the belt member, the density of the main pattern appears lighter than the actually printed image. On the other hand, in the portion that does not overlap with the tape member, the density of the main figure and the actually printed image appear to be the same. Therefore, it becomes clear that the visibility of the main pattern is lowered at the portion overlapping with the belt member, and the user can easily recognize the thickness of the belt member.

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, a plurality of nonwoven regions (regions overlapping with the belt member) are laminated on the main pattern, and the shape of the main pattern can be seen through the nonwoven fabric, and visibility degradation can be easily recognized.

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, 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 rear main graphic and the indication portion are less likely to overlap, unnecessary deterioration of the visibility of the rear main graphic due to the indication portion can be 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 of the absorbent article as a whole is less likely to change. conspicuous. Therefore, the user easily recognizes the difference in the visibility of the main figure in the region overlapping with the tape member and in the region not overlapping.

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, unnecessary degradation of visibility of the rear main graphic can be 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 indication portion changes, since the visibility of the rear main graphic is less likely to be affected, unnecessary degradation of visibility of the rear main graphic can be further easily 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" hereinafter. In addition, the longitudinal direction in the expanded 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 defined as the "thickness direction", and the side in contact with the skin of the wearer is defined 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 crotch of the wearer to absorb residual excrement such as urine as a first component, and has a body that covers the abdomen from the front side of the wearer. The front belt member 30 is a second component, and the rear belt member 40 that covers the back side of the wearer from the rear side is provided as a third component.

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, and 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 bent 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 of the wearing state which formed the waist opening 1HB and a pair of leg opening 1HL as shown in FIG. 1 becomes.

(absorbent body 10)

Absorbent main body 10 has the function of absorbing excrement such as urine, and as shown in FIGS. 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 a surface sheet member 13 covering the absorbent core 11 from the non-skin side to form the exterior of the absorbent main body 10. The back sheet member 15 .

Absorbent core 11 is a structure made of layered liquid absorbent material A piece that 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 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 stands up 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. Exterior sheet 15b has a portion 15bf extending from both sides in the left-right direction of the leak-proof sheet 15a toward the left-right direction. The leg-hole elastic member 17 made of rubber or the like and the leg-hole auxiliary elastic member 19 are fixed in a state stretched vertically in the vicinity of the folded position, thereby forming the above-mentioned leg-hole hem LG. 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 part 15bf is folded toward both outer sides in the left-right direction, and the LSG elastic member 18 such as thread rubber is fixed in a state of being stretched in the up-down direction at the front end thereof. 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 inserted 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 in Figure 4, the character corner of the panda is printed Color (main patterns 101, 102 described later) is an example of a pattern. 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 .

(with 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 joined and fixed to the non-woven fabrics 31, 32 in a state of being stretched in the vertical direction and left-right direction while being interposed and arranged at intervals in the vertical direction. 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 the region between the 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 point (cut end) toward the belt member joining portions 37b on both sides in the left and right direction, and stops shrinking at the position of the inner end of the belt member joining portion 37b in the left and right direction. 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 in the left-right direction on the front side (abdominal side) of the diaper 1 . In this discontinuous part, with respect to the absorbent body 10 (absorbent core 11), the contraction force in the left-right direction is less likely to act, and the absorbent 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 main body joining portion 51 . The front body joining portion 51 is formed using joining means such as welding and bonding. In this embodiment, the front body 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 is formed through 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 back 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 main body 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 the sheet member 38, when the diaper 1 is worn, the edges of the upper front 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 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 figure" refers to the figure printed on the non-skin side of the leak-proof sheet 15a, for the front side or the rear side in the state where the absorbent main body 10 is stretched in the up-down direction and left-right direction. On at least one side of the surface, graphics printed on an area of 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, when 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 this "cloud" also becomes a constituent element of the main figure. .

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. In addition, even if a plurality of human characters are arranged at positions separated from each other, when 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, luminance 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, the main figure can be accurately measured by calculating the area surrounded by the outline pixels extracted from the read data. area. 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 be calculated by other methods.

<About the Arrangement of Main Graphics> The diaper 1 can make it easy for the user to understand the components constituting the diaper 1 by adjusting the visibility of the main graphics 101, 102 provided on the non-skin side of the absorbent main body 10, especially the front side. The belt member 30 and the rear belt member 40 have sufficient strength. 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 absorbent 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 this embodiment, the front main graphic 101 is arranged such that the area of the portion where the front main graphic 101 overlaps the front belt member 30 is 50% or more 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 overlapping portion 10fu. Equally, the area of the part where the rear side main figure 102 overlaps with the rear side belt member 40 is more than 50% of the area of the rear side main figure 102, and more than 50% of the area of the rear side main figure 102 is configured in the rear side overlapping portion. 10bu.

In the front side overlapping portion 10fu and the rear side overlapping portion 10bu, the belt members 30, 40 are arranged overlapping the non-skin side of the main patterns 101, 102. That is, in this region, a plurality of nonwoven fabrics (15b; 31, 32; 41, 42, etc.) are laminated and arranged on the non-skin side in the thickness direction of the main patterns 101, 102. When such a diaper 1 is viewed from the outside, the main figures 101, 102 are formed in areas where the main figures 101, 102 overlap with the belt members 30, 40, and the main figures 101, 102 can be seen through the belt members 30, 40. Therefore, the visibility of the main graphics 101, 102 is reduced in the area where the belt members 30, 40 overlap.

Specifically, in areas where the main figures 101, 102 overlap with the belt members 30, 40, the colors forming the main figures 101, 102 appear pale or the outlines appear blurred. In this way, similar to the belt members 30 and 40 , the visibility of the main graphics 101 and 102 is intentionally lowered, so that users (infant caregivers, etc.) can surely recognize the existence of the belt members 30 and 40 . Furthermore, the lower the visibility of the main graphics 101, 102 in the area overlapping with the belt members 30, 40, the easier it is to recognize the thickness of the belt members 30, 40, and it is possible to suppress the user from feeling uneasy about the strength of the belt members 30, 40. Condition.

In addition, in order to clarify the degree of reduction in visibility of the main graphics 101, 102, it is desirable that the main graphics 101, 102 be formed in both areas overlapping with the belt members 30, 40 and areas not overlapping. That is, the front main pattern 101 is desirably formed across the boundary between the front overlapping portion 10fu and the front non-overlapping portion 10fd (see FIG. 5A ). Likewise, the rear main pattern 102 is desirably formed across the boundary between the rear overlapping portion 10bu and the rear non-overlapping portion 10bd (see FIG. 5B ).

According to such a structure, the main graphics 101, 102 look sharp in areas that do not overlap with the belt members 30, 40, but in contrast to this, the visibility of the main graphics 101, 102 in areas that overlap with the belt members 30, 40 is reduced. Looks like the decline is becoming clear. That is, as shown in FIG. 1 and FIG. 5 , in the front main pattern 101 , the part overlapping with the front belt member 30 and the part that does not overlap clearly have a clear difference in visibility, and the thickness of the front belt member 30 can be recognized more easily.

Also, in the diaper 1, at least a part of the main patterns 101, 102 do not overlap with the belt member joining portions 37, 47. For example, in FIG. 5A , the front side main pattern 101 has a portion that does not overlap with neither the belt member engaging portions 37 a nor 37 b. When wearing the diaper 1, when the front side belt member 30 shrinks in the left and right direction due to the elastic force of the waist elastic member 35, in the area where the belt member joining portion 37 is not formed, the nonwoven fabric 31 on the skin side and the nonwoven fabric on the non-skin side 32 are not bonded to each other, so each nonwoven fabric shrinks individually and tends to float in the thickness direction. In this way, the visibility of the front main pattern 101 is further reduced at the portion where the nonwoven fabrics 31 and 32 float in the thickness direction, so that the user can easily recognize the thickness of the front belt member 30 . In addition, since the nonwoven fabrics 31 and 32 float in the thickness direction, the three-dimensionality of the front side belt member 30 is emphasized, and the user can be reminded of a soft touch. The same applies to the rear main graphic 102 in FIG. 5B . Therefore, since at least a part of the main pattern 101, 102 does not overlap with the belt member joining portion 37, 47, the user can feel that the belt member 30, 40 has sufficient strength and has a soft touch on the skin.

Also, in the diaper 1, the basis weight of the nonwoven fabric forming the belt members 30 and 40 is larger than the basis weight of the nonwoven fabric forming the exterior sheet 15b of the absorptive main body 10. Here, "basis weight" refers to the mass per unit area. Generally, when the area of a nonwoven fabric is the same, the heavier the basis weight of the nonwoven fabric, the easier it is to reduce the light transmittance. Here, by increasing the basis weight of the belt members 30, 40 as much as possible (reducing the light transmittance), the visibility of the portion overlapping with the belt members 30, 40 among the main patterns 101, 102 can be further reduced.

For example, on the front side of the absorbent main body 10, the only sheet member laminated on the non-skin side of the main pattern 101 at the front non-overlapping portion 10fd is the exterior sheet 15b. On the other hand, in the front side overlapping portion 10fu, there are three sheet members (refer to FIG. 7 ) that are laminated with the exterior sheet 15b, the nonwoven fabric 31, and the nonwoven fabric 32 on the non-skin side of the front side main pattern 101. In such a structure, by reducing the basis weight of the exterior sheet 15b and increasing the basis weight of the non-woven fabrics 31, 32, the front main pattern 101 can be easily seen through the exterior sheet 15b at the front non-overlapping portion 10fd, and the front main pattern 101 can be easily seen through the exterior sheet 15b at the front non-overlapping portion 10fu. Since the front side belt member 30 is not easy to pass through, the front side main pattern 101 is not easy to see. Therefore, the user can more easily recognize the thickness of the front side belt member 30 . The same applies to the rear belt member 40 .

Also, the main figures 101, 102 are repeated with at least a part of the continuous portion of the waist elastic members 35, 45 after the reverse operation (that is, the portion where the tension caused by the waist elastic members 35, 45 acts). configuration. In this continuous portion, the waist elastic members 35 and 45 are contracted, so that the belt members 35 and 45 are contracted in the left and right directions and a plurality of wrinkles having irregularities are formed in the thickness direction. That is, the surfaces of the belt members 30 and 40 are deformed into accordion shapes. Therefore, the visibility of the part which overlaps with the area|region in which the wrinkle was formed among the main patterns 101,102 is reduced, and it becomes easy for a user to recognize the belt member 30,40. Also, by forming a plurality of wrinkles, the belt members 30 and 40 appear thicker, and the user can feel softness.

In addition, in the diaper 1, the front side body joint portion 51 that joins the absorbent body 10 and the front side belt member 30 is at the position shown by the hatched portion in FIG. It is formed by arranging plural numbers at predetermined intervals in the left-right direction. Moreover, the front body joint portion 51 overlaps with the front main pattern 101 in at least a part of the area. When the diaper 1 is worn, if the front belt member 30 (waist elastic member 35) contracts in the left and right directions, the portion of the absorbent main body 10 where the belt-shaped joining portion 51a is formed shrinks in the left and right directions together with the front belt member 30. On the other hand, the absorbent main body 10 does not shrink in the left-right direction between the two adjacent belt-shaped joining portions 51a, and the front side belt member 30 and the absorbent main body 10 are separated from each other and easily float in the thickness direction. Furthermore, the visibility of the front main graphic 101 is greatly reduced in the raised area. Thereby, it becomes easier to recognize the thickness of the front side belt member 30 .

Similarly, the rear side body joint portion 52 that joins the absorbent body 10 and the rear side belt member 40 is as shown by the hatched portion in FIG. A plurality of arrays are formed at predetermined intervals. Furthermore, the rear main body joint portion 52 overlaps with the rear main pattern 102 in at least a part of the area. Therefore, the rear side belt member 40 and the absorptive main body 10 float between the two belt-shaped junction parts 52a adjacent to the left-right direction, and the thickness of the rear side belt member 40 can be recognized more easily.

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 the state in which the diaper 1 is worn by infants and young children. Since there are many opportunities to recognize the rear main figure 102 , the rear main figure 102 will have a great influence on the design of the diaper 1 . For example, as shown in Figure 6, when an infant wearing diaper 1 is crawling, the rear side main graphic 102 is easy to attract the attention of the user (caregiver) on the rear side covering the infant's buttocks, and is consistent with the drawn characters. Working together makes a lovely impression.

And, as mentioned above, in the rear side main pattern 102, the part overlapping with the rear side belt member 40 (the part arranged in the rear side overlapping part 10bu) and the part not overlapping with the rear side belt member 40 (arranged in the rear side The portion of the side non-overlapping portion 10bd) is relatively degraded in visibility. Therefore, the thickness of the rear side belt member 40 is easy to recognize at a glance, and even when the wearer (infant) performs movements such as crawling, the user (caregiver) will not feel uneasy about the strength of the rear side belt member 40. And watch it with peace of mind.

The diaper 1 of this embodiment is provided with both the front side main pattern 101 and the rear side main pattern 102 as shown in FIG. 5A and FIG. 5B . Furthermore, the front main graphic 101 and the rear main graphic 102 are different in size and arrangement. 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 portion (lower portion in the vertical direction) on the front side of the absorbent main body 10 tends to shrink in the widthwise direction (left-right direction) because it is sandwiched between the legs. Therefore, when the front main graphic 101 is arranged near the lower part, the front main graphic 101 may shrink toward the width direction due to the shrinkage of the absorbent main body 10, and may become less visible. On the other hand, such problems are less likely to occur on the rear side of the absorbent main body 10, and since the rear main graphic 102 is provided at a low position, it is easy to see in a wide range of the wearer's buttocks. 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 figures 101 and 102, the front main figure 101 is formed on the diaper 1 so that the size (area) of the front main figure 101 is smaller than the size (area) of the rear main figure 102. As mentioned above, the main figure 102 on the rear side is arranged at a position where it is easy to enter the eyes of the user when the infant is crawling. Furthermore, it has a function to allow the user to easily recognize the thickness of the rear side belt member 40 by lowering the visibility in the region overlapping with the rear side belt member 40 . Therefore, by forming the rear main figure 102 as large as possible, while improving the visibility as a whole of the rear main figure 102, it is easy to recognize the portion overlapping with the rear belt member 40 and the portion not overlapping, resulting in a difference in visibility. Case.

Again, in the paper diaper 1 of the present embodiment, the area of the portion where the front main figure 101 overlaps with the front belt member 30 is smaller than the area where the rear main figure 102 overlaps with the rear belt member 40 (see FIGS. 5A and 5B ). ). Since the front main pattern 101 is arranged at a position where it is difficult for the user to recognize when the infant is crawling, compared with the rear main pattern 102, it is difficult to recognize the decrease in visibility due to overlapping with the front belt member 30 . On the other hand, the rear side main figure 102 is easy to see by the user's eyes when the infant crawls as mentioned above, so the larger the overlapping portion with the rear side belt member 40, the larger the rear side main figure in the overlapping portion. The reduced degree of visibility of the graphic 102 tends to become conspicuous.

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). In the present embodiment, the visibility in this area is intentionally lowered by overlapping a part of the main pattern 101, 102 with the belt members 30, 40 . Therefore, if the outline is too thin, there is a possibility that the shape of the pattern of the main figure cannot be recognized. On the other hand, if the contour line is formed with a thickness of 3 mm or more, the main figure can be recognized through a plurality of non-woven fabrics (15b; 31, 32; 41, 42, etc.) The shapes of the figures 101 and 102 make it easy to know that the visibility is lowered. 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 all-over smearing (for example, the part of the panda's ear in FIG. 5A ), it may be considered that the entire 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, by changing the printing conditions according to the area of the absorbent main body 10 (leakage-preventing sheet 15a), a part of the main graphics 101, 102 will be The degree of visibility reduction becomes clear.

For example, when forming the rear main pattern 102, printing can be performed by adjusting the printing tone value to the same size in the rear overlapping portion 10bu and the rear non-overlapping portion 10bd. Specifically, the average of the printed tone values of the rear main pattern 102 formed in the region overlapping the rear belt member 40 (the rear overlapping portion 10bu) and the average value of the printing tone values of the rear main pattern 102 formed in the region not overlapping the rear belt member 40 The average of the printing tone values of the rear main pattern 102 in (the rear non-overlapping portion 10bd) is printed so as to be substantially equal. As a result, in the rear main pattern 102, the density of the portion overlapping with the rear belt member 40 and the density of the portion not overlapping are printed as images with substantially the same density. 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 sheets of non-woven fabric that is laminated on the rear side main pattern 102 is small, the rear side main pattern 102 looks and is the same density as the actual printed image. Therefore, when the user visually recognizes the diaper 1 from the outside, the difference in the density of the image becomes remarkable in the rear overlapping portion 10bu and the rear non-overlapping portion 10bd, and the visibility of the rear main graphic 102 in the rear overlapping portion 10bu The reduction becomes clear. 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 can be made almost equal. For example, regarding the print data for printing the rear side main pattern 102, the brightness of the part formed in the rear side overlapping part 10bu is adjusted to be equal to the brightness of the part formed in the rear side non-overlapping part 10bd. Execute printing. In this way, an image having the same level of brightness is printed on the portion overlapping the rear belt member 40 (rear overlapping portion 10bu) and the non-overlapping portion (rear non-overlapping portion 10bd) of the rear main pattern 102 . At this time, the rear side main pattern 102 appears darker than the actual printed image by seeing through the plurality of non-woven fabrics at the back side repeating portion 10bu, and the back side main pattern 102 is made darker at the back side non-repeating portion 10bd. Appears to have the same brightness as the actual printed image. Therefore, when the user visually recognizes the diaper 1 from the outside, the difference in the brightness of the image becomes remarkable in the rear overlapping portion 10bu and the rear non-overlapping portion 10bd, and the visibility of the rear main graphic 102 in the rear overlapping portion 10bu The reduction becomes clear. The same applies to the front main pattern 101 .

Moreover, in the diaper 1, by adjusting the size of the part which overlaps with the front side belt member 30 and the rear side belt member 40 in the absorptive main body 10, design property is improved. 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 region between the crotch side (the lower side in the vertical direction) of the front side is sandwiched by the wearer's legs 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 likely to be formed larger than the front main figure 101, if the indicator part 60 is arranged long on the rear side, the overlap between the rear main figure 102 and the indicator part 60 is easy. get bigger. 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, as shown in FIG. 6, when the wearer (infant) crawls, the deterioration of the visibility due to the indication portion 60 tends to become conspicuous, and there will be so-called damage to allow the user to recognize the thickness of the rear side belt member 40. Concerns about the functionality of the main graphics 102 side. That is, the visibility of the rear main graphic 102 may deteriorate unnecessarily. Here, in the diaper 1, the length of the indication part 60 on the back side of the absorptive main body 10 becomes shorter than the length of the indication part 60 on the back side. Thereby, the back side main figure 102 and the indication part 60 are less likely to overlap, so that the visibility of the back side main figure 102 can be suppressed from being unnecessarily deteriorated.

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, when the overlapping area between the rear main graphic 102 and the indicator portion 60 becomes larger, unnecessary deterioration of visibility becomes more conspicuous. On the other hand, when the diaper 1 is worn, the front main figure 101 tends to contract in the left and right directions by being sandwiched between the wearer's legs, and the front main figure 101 is arranged when the infant crawls. , a position that is not easily recognized by the user. Therefore, compared with the rear main graphic 102, the influence of deterioration of visibility is small. That is, even if the overlapping area between the front main graphic 101 and the indication portion 60 becomes larger, problems are less likely to occur. According to such a structure, a user can easily recognize the difference in the visibility of the main pattern 101,102 between the area which overlaps with the band member 30,40, and the area which does not overlap. Therefore, the thickness of the belt members 30 , 40 can be recognized by the user based on the difference in visibility of the main patterns 101 , 102 .

In addition, the indication 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 area of the overlapping portion of the indicator 60 and the rear main graphic 102 can be minimized, and when the color of the indicator 60 changes due to urination, it is easy to suppress unnecessary deterioration of the visibility of the rear main graphic 102 .

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. Unnecessary deterioration of visibility.

===Other Embodiments=== In the above, the embodiments of the present invention have been described, but the above-mentioned embodiments are intended to facilitate 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‧‧‧diapers (absorbent articles) 1HB‧‧‧waist opening 1HL‧‧‧leg opening

10: Absorbent body

10ea: the upper end of the front side

10eb: the upper end of the rear side

10fu: Anterior repetition

10fd: non-repetitive front side

10bu: Posterior repeat

10bd: Non-repetitive part on the back side

11: Absorbent core

11a: front end

11b: Rear end

11c: Constriction

13: Surface sheet member

15: Back sheet member

15a: leak-proof sheet

15b: External sheet

15bf: part

17: leg circumference elastic member

18: LSG elastic member

19: Leg circumference assist elastic member

30: front side belt member

30ea: upper end

30ew: side edge joint

31: non-woven fabric

32: non-woven fabric

32f: Front folded part

32feb: lower end

35: waist elastic member

37: Belt member joint

37a, 37b: belt member junction

38: Thin sheet member

40: Rear side belt member

40ea: upper end

40ew: side edge joint

41: non-woven fabric

42: non-woven fabric

42f: Rear folded part

42feb: lower end

45: waist elastic member

47: Belt member joint

47a, 47b: belt member junction

48: Thin sheet member

51: Front body joint

51a: Ribbon junction

52: rear body joint

52b: Ribbon junction

60: instruction department

101: Front side main graphics

102: Rear main graphics

C10‧‧‧folding position LG‧‧‧leg hem LSG‧‧‧three-dimensional hem (leakage-proof 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 main front view of the front side of the diaper 1 Figure 101 configuration for illustration. FIG. 5B is a diagram illustrating the arrangement of the rear main graphic 102 on the rear side of the diaper 1 .

[ Fig. 6 ] A view 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.

35: waist elastic member

51a: Ribbon junction

60: instruction department

30: front side belt member

37b: Belt member joint

C101: Central position in the up and down direction

10fu: Anterior repetition

LC101: Distance in the up and down direction

10fd: non-repetitive front side

10: Absorbent body

101: Front side main graphics

11: Absorbent core

C10: Folded position

45: waist elastic member

52a: Ribbon-shaped joint portion

40: Rear side belt member

47b: Belt member joint

10bu: Posterior repeat

C102: Central position in the up and down direction

10bd: Non-repetitive part on the back side

LC102: Distance in the up and down direction

102: Rear main graphics

Claims (18)

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 the side, the non-skin side of the leak-proof sheet is provided with main graphics, and the aforementioned absorbent main body is stretched toward the aforementioned up-down direction and the aforementioned left-right direction, and the area of the aforementioned main graphic is the area of the aforementioned non-skin side on the aforementioned one side. 40% or more of that, and the area of the portion where the band member on one side overlaps with the aforementioned main figure is 50% or more of the area of the aforementioned main figure. The absorbent article described in claim 1, wherein the main pattern is a region where the absorbent main body overlaps with the belt member on the one side and the absorbent main body does not overlap the belt member on the one side. The boundaries of the region are configured. The absorbent article described in Claim 1 or Claim 2, wherein the front side belt member and the rear side belt member respectively have a skin-side nonwoven fabric and a non-skin side nonwoven fabric, and the skin-side nonwoven fabric and the non-skin side nonwoven fabric are , are overlapped and joined in the thickness direction via the band member joining portion, and at least a part of the main pattern does not overlap with the region where the belt member joining portion is provided. The absorbent article described in claim 1, wherein the absorbent main body has an exterior sheet on the non-skin side of the leak-proof sheet, and the basis weight of the nonwoven fabric forming the front belt member and the rear belt member is, It is larger than the basis weight of the nonwoven fabric forming the aforementioned exterior sheet. The absorbent article described in claim 1 of the patent claims, wherein the front side belt member and the rear side belt member respectively have The waist elastic member stretchable in the right direction, at least a part of the aforementioned main pattern, overlaps with the area where tension acts by the aforementioned waist elastic member. The absorbent article described in claim 1, wherein the front side belt member and the rear side belt member are arranged at predetermined intervals in the left-right direction via a plurality of belt-shaped joining portions along the vertical direction. The body joints are respectively jointed with the aforementioned absorbent body, and at least a part of the aforementioned main pattern is repeated with the area where the body joints are provided. 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 1, wherein the front main graphic is provided on the front side of the absorbent main body, the main rear graphic is provided on the rear side of the absorbent main body, and in the vertical direction, the front side The central position of the main figure is higher than the central position of the aforementioned rear main figure. The absorbent article according to claim 8, wherein the area of the front main graphic is smaller than the area of the rear main graphic. The absorbent article described in claim 8 or claim 9, wherein the area of the portion where the front main pattern overlaps the front belt member is larger than the area of the portion where the rear main pattern overlaps the rear belt member smaller. The absorbent article described in claim 1, wherein 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 and the difference between the main graphic and the absorbent The average of the printing tone values of the above-mentioned main graphics in the portion where the faces on one side of the sexual body do not overlap is equal. In the absorbent article described in claim 1, the thickness of the outline forming the outline of the main figure is 3 mm or more. The absorbent article described in claim 1, wherein the above-mentioned main figure is the same pattern as the character represented by the product packaging bag of the above-mentioned absorbent article. In the absorbent article described in claim 1, in the vertical direction, the position of the rear upper end of the absorbent main body is higher than the position of the front upper end of the absorbent main body. The absorbent article described in claim 1, wherein the absorbent main body is provided along the vertical direction with an indicator portion that changes color due to contact with moisture, and is arranged on the absorbent body in the vertical direction. The length of the said indication part on the front side of a main body is longer than the length of the said indication part arrange|positioned at the back side of the said absorptive main body. The absorbent article described in claim 15 of the scope of the patent application, wherein the front main graphic is provided on the front side of the absorbent main body, the main rear graphic is provided on the rear side of the absorbent main body, and the main front graphic and the indication The area of the portion where the portion repeats is larger than the area of the portion where the aforementioned rear main figure overlaps with the aforementioned indicating portion. The absorbent article according to claim 15 or claim 16, wherein the indication unit is not disposed on the rear side of the absorbent main body. The absorbent article described in claim 15 or claim 16 of the patent claims, wherein the main figure on the rear side does not overlap with the indicating part.

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