JP6143807B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper, and more particularly to a disposable diaper such as defecation training pants and an incontinence brief.

Conventionally, disposable diapers including front and rear waist members that cover a wearer's waist area are known. For example, Patent Document 1 discloses an inner sheet positioned on the skin facing surface side, an outer sheet positioned on the non-skin facing surface side, and a waistline elastic body and graphic interposed between the inner sheet and the outer sheet. A front and rear waistline member including a graphic sheet on which is formed is disclosed.
The waistline elastic body is attached via an adhesive between the inner and outer surface sheets in a stretched state in the waistline direction so that contraction force acts in the waistline direction.

  In this disposable diaper, the waistline elastic body is cut off at the portion where the graphic sheet is arranged so that the contraction force does not act. By cutting off the waistline elastic body in this manner, the contraction force of the waistline elastic body does not act on the portion where the graphic is displayed, and wrinkles due to the contraction force of the waistline elastic body do not occur. You can avoid that.

JP-T-2006-525858

  However, the invention disclosed in Patent Document 1 does not disclose a technical idea using graphics in order to visually check whether or not the waistline elastic body is appropriately cut or excised.

  Therefore, an object of the present invention is to provide a disposable diaper that can easily visually check whether or not the waistline elastic body is appropriately cut or excised using a graphic.

In order to solve the above problems, the present invention is directed to an inner sheet that has a skin facing surface and a non-skin facing surface, defines a front and rear waistline member, and is positioned on the skin facing surface side. An outer sheet positioned on the non-skin facing surface side, a waist elastic body extending between the inner and outer sheets and extending in a lateral direction of the front and rear waist members and having contractility, and the waist elastic body A disposable diaper comprising a non-elastic region, a graphic sheet having a graphic visible from the outer sheet, and a liquid absorbing structure .

In this disposable diaper, the present invention is characterized in that an end portion of the waistline elastic body is between the graphic sheet and the outer surface sheet and crosses both side edges from the outside of the graphic sheet. extends to the inside, the side of the non-skin facing surface of the graphic sheet, said has a recess recessed toward the side to the side of the skin-facing surface of the non-skin-facing side, said graphic sheet said inner sheet The first adhesive is applied between the inner sheet and the graphic sheet, and the second adhesive is applied between the inner sheet and the liquid absorbing structure. The direction intersects.

In one preferred embodiment of the present invention, the first adhesive is applied in a wave shape to the inner surface sheet to join the inner surface sheet and the graphic sheet, and the second adhesive is used as the liquid absorbing structure. The inner sheet and the liquid absorbing structure are bonded to each other in a wave shape.

According to the disposable diaper according to one or more embodiments of the present invention, the non-shrinkable end of the waistline elastic body is between the graphic sheet and the outer surface sheet, and both side edges thereof from the outside of the graphic sheet. The end portion of the waistline elastic body can be visually recognized from the non-skin facing surface of the outer surface sheet. Therefore, it is possible to visually recognize the end of the waistline elastic body and easily visually check whether or not the waistline elastic body has been appropriately cut or excised using a graphic.

The perspective view when the disposable diaper in 1st Embodiment of this invention is seen from the front waist area side. The partial fracture top view of the diaper in the state where the joint of the both sides of the diaper is released and is flat and not contracted. The exploded perspective view of a diaper. (A) Front view of diaper. (B) The rear view of a diaper. The VV sectional view taken on the line of Fig.4 (a). The principal part perspective view which shows the application direction of an adhesive agent. The front view which shows the principal part of the disposable diaper of 2nd Embodiment.

  An embodiment of a disposable diaper according to the present invention will be described below with reference to the accompanying drawings.

[First Embodiment]
Referring to FIGS. 1 and 2, the diaper 1 is formed in a pants shape having a waist opening 2 and a pair of leg openings 3. In the figure, X indicates a horizontal direction, Y indicates a vertical direction Y orthogonal to the horizontal direction X, and Z indicates a front-rear direction orthogonal to the horizontal direction X and the vertical direction Y, respectively.
The diaper 1 includes an annular waistline member 4 that extends in the waistline direction, and a crotch member 5 that extends in a direction intersecting the waistline direction.
The waistline member 4 includes a front waistline member 6 and a rear waistline member 7. The diaper 1, that is, the annular waistline member 4 and the crotch member 5, has a skin facing surface that is an inner surface thereof and a non-skin facing surface that is an outer surface thereof.

  The front and rear waist members 6 and 7 have front and rear side edges 8 and 9 that face the lateral direction X and extend in the longitudinal direction Y. The front and rear side edges 8 and 9 face each other and are joined at a joint 10 that is intermittently arranged in the longitudinal direction Y, whereby the waist opening 2 is defined.

In FIG. 2, P indicates a virtual vertical center line that bisects the diaper 1 in the horizontal direction X, and Q indicates a virtual horizontal center line that bisects the crotch member 5 in the vertical direction Y.
The diaper 1 is formed symmetrically with respect to the virtual vertical center line P.
The diaper 1 has a front waist region 11, a rear waist region 12, and a crotch region 13 positioned between the front and rear waist regions 11 and 12, which are connected to each other in the longitudinal direction Y. The front and rear waist members 6 and 7 have a pair of waist outer end portions 21 and 22 and a pair of crotch end portions 24 and 25 that face the longitudinal direction Y and extend in the lateral direction X.
The crotch member 5 is disposed between the front waistline member 6 and the rear waistline member 7 in the central portion in the longitudinal direction Y, and is connected to these members 6 and 7. Specifically, the crotch front end portion 5 a of the crotch member 5 is joined to the front waistline member 6, and the crotch rear end portion 5 b is joined to the rear waistline member 7. By this joining and the joining of the front and rear side edges 8 and 9, the leg opening 3 is defined between the crotch ends 24 and 25 of the front and rear waist members 6 and 7 and both side edges 5 c of the crotch member 5. (See FIG. 1).

The crotch member 5 includes a liquid absorption structure 31. The liquid-absorbing structure 31 includes a liquid-absorbing core material 32 composed of a mixture of wood fluff pulp and superabsorbent polymer particles, and a liquid-absorbing diffusion sheet 33 made of, for example, tissue paper that wraps the core material 32. A liquid-permeable inner sheet 34 made of, for example, a fiber nonwoven fabric, which covers the skin facing surface side of the liquid-absorbing diffusion sheet 33, and an outer sheet made of, for example, a fiber nonwoven fabric, which covers the non-skin facing surface side of the liquid-absorbing diffusion sheet 33. 35. Further, a leak-proof sheet 36 made of a moisture-permeable plastic film is disposed between the liquid-absorbing diffusion sheet 33 and the outer sheet 35. The leakage prevention sheet 36 is substantially the same size as the core material 32 in the vertical and horizontal directions, or larger than that, and prevents excrement absorbed by the core material 32 from leaking to the non-skin facing surface side. Covering the crotch front and rear end portions 5a and 5b of the crotch member 5 including the liquid absorbing structure 31 with the folded portion 43 of the outer surface sheet 42 described later prevents the core material 32 from spilling out.
Between the inner sheet 34 and the outer sheet 35, leg elastic bodies 37 extending in the vertical direction Y are attached to both side edges in the horizontal direction X of the liquid absorbing structure 31 in an extended state.

  The core member 32 is bent toward the inner side in the horizontal direction X at substantially the center in the vertical direction Y (see FIG. 3). By setting it as such a shape, when the diaper 1 is worn, the diaper 1 fits around a wearer's leg. Leg elastics extending in the longitudinal direction Y between the inner flap 34 and the side flaps formed by the side edges 34a, 34b of the outer sheet 35 extending outward from both sides in the lateral direction X of the core 32 37 is fixed through an adhesive (not shown) in an extended state. Therefore, when worn, due to the contraction of the leg elastic body 37, both side flaps rise to the side of the skin facing surface to form a wall that prevents leakage. In addition, it can replace with a side flap, or can also form the wall which prevents a leak by forming the leak prevention cuff made from a fiber nonwoven fabric on the skin facing surface side of the crotch member 5, for example.

The front and rear waist members 6, 7 have an inner surface sheet 41 made of, for example, a fiber nonwoven fabric that defines a skin facing surface and an outer surface sheet 42 made of, for example, a fiber nonwoven fabric, that defines a non-skin facing surface. The outer sheet 42 preferably has a light transmittance of 75% or more, more preferably 83% or more.
The outer surface sheet 42 forms a folded portion 43 toward the skin facing surface side at the waist outer end portions 21 and 22. The folded portion 43 covers the crotch front and rear end portions 5 a and 5 b of the crotch member 5.

A plurality of waistline elastic bodies 44 are interposed between the inner sheet 41 and the outer sheet 42.
The waistline elastic body 44 extends in the lateral direction X and is fixed via an adhesive (not shown) between the inner and outer surface sheets 41 and 42. As the waistline elastic body 44, for example, a thread-like or string-like thing made of a thermoplastic synthetic resin such as stretchable polyurethane or the like and having rubber elasticity can be used. In the longitudinal direction Y, the waistline elastic body 44 is disposed from the crotch end portions 24 and 25 to the waist outer end portions 21 and 22 at regular intervals, for example.

In FIG. 2, the waistline elastic body 44 disposed between the waist opening 2 and the crotch front end edge 5a in the longitudinal direction Y of the front waistline member 6 defines an inelastic region 61 by cutting or the like to be described later. However, it is preferable to use one having about 620 to 940 dtex that is continuous in the transverse direction X, and is preferably stretched about 2.2 to 2.6 times and fixed to the inner and outer surface sheets 41 and 42. These waistline elastic bodies 44 have a function of fitting the upper part of the front waistline member 6 around the wearer's front waistline.
Further, the waistline elastic body 44 disposed between the crotch front end edge 5a and the front end edge of the core member 32 does not define a non-elastic region 61 by cutting or the like described later, and is continuous in the lateral direction X. For example, it is preferable to use about 470 to 940 dtex, and it is preferable to extend it about 1.9 to 2.4 times and fix it to the inner and outer surface sheets 41 and 42. These waistline elastic bodies 44 have a function of fitting the inner sheet 34 and the like around the front waistline of the wearer.
Further, the waistline elastic body 44 disposed below the front end edge of the core member 32 defines a non-elastic region 61 by cutting or the like, which will be described later, in the central portion in the lateral direction X, for example, about 320 to 780 dtex. It is preferably used, and is preferably fixed to the inner and outer surface sheets 41 and 42 and the front graphic sheet 51 by extending about 2.6 to 3.5 times. These waistline elastic bodies 44 overlap the core material 32 and have a function of pressing the core material 32 against the wearer's skin. These waistline elastic bodies 44 preferably have sufficient shrinkage to press the core material 32 against the wearer's skin even if the non-elastic region 61 is defined. The expansion ratio is set higher than that of the waistline elastic body 44. Further, when the expansion ratio is increased in this way, if the number per unit length in the longitudinal direction Y is small, the waistline elastic body 44 locally bites into the wearer's skin, so the per unit length in the longitudinal direction Y By increasing the number, the core member 32 can be pressed against the wearer's skin as a whole by the plurality of waistline elastic bodies 44 and the waistline elastic body 44 can be prevented from biting into the wearer's skin. In consideration of this, it is more preferable to use the waistline elastic body 44 of about 320 to 500 dtex, and it is more preferable to arrange them at intervals of 6 mm or less.
Although the front waistline member 6 has been described above, the same applies to the rear waistline member 7.
The expansion magnification of the waistline elastic body 44 can be confirmed as follows. First, the inner and outer surface sheets 41 and 42 are stretched so as not to cause wrinkles due to contraction of the waistline elastic body 44. Next, in the stretched state, the waistline elastic body 44 is marked with a constant dimension A in the lateral direction X (length direction). Next, the waistline elastic body 44 is taken out from the inner and outer surface sheets 41 and 42. At the time of this removal, the waistline elastic body 44 is dissolved in an adhesive fixed to the inner and outer surface sheets 41, 42 using a solvent such as toluene so that no adhesive remains on the waistline elastic body 44. Like that. Finally, the dimension B in the length direction in the non-stretched state (natural state) is measured, and the stretch ratio is calculated by dividing the dimension A by the dimension B.

Referring to FIG. 3, in the front and rear waistline members 6 and 7, front and rear graphic sheets 51 and 52 having a substantially rectangular shape are interposed between the inner surface sheet 41 and the outer surface sheet 42.
The front and rear graphic sheets 51 and 52 can be made of thermoplastic synthetic resin films, fiber nonwoven fabrics, or paper.
The front and rear graphics 54 and 55 are printed on the side of the non-skin facing surface of the front and rear graphic sheets 51 and 52 at approximately the center in the lateral direction X. The front and rear graphics 54 and 55 are passed through the light-transmitting outer sheet 42. Visible. Further, front and rear non-graphic areas 57 and 58 where the front and rear graphics 54 and 55 are not printed are located around the front and rear graphics 54 and 55 of the front and rear graphic sheets 51 and 52.

  A graphic 54 on the front side of the character is printed on the front graphic sheet 51 in the front waistline member 6, and a graphic 55 on the rear side of the character is printed on the rear graphic sheet 52 in the rear waistline member 7. Thus, when different front and rear graphics 54 and 55 are positioned depending on the front and rear graphic sheets 51 and 52, these can be used as indicators for determining the front and rear of the diaper 1 and can be prevented from being worn by mistake. .

FIG. 4A is a front view of the diaper 1, and FIG. 4B is a rear view of the diaper 1. FIG. 5 is a cross-sectional view taken along line VV in FIG.
The waistline elastic body 44 is cut at a central portion in the lateral direction X of the front and rear waistline members 6 and 7, and front and back inelastic regions 61 and 62 where the contraction force of the waistline elastic body 44 does not act are defined. More specifically, by cutting the center part of the waistline elastic body 44 that is stretched in the lateral direction X and contracting (snapback) the waistline elastic body 44 outward in the lateral direction, the front and rear waistline members 6, 7 Front and rear inelastic regions 61 and 62 where the contraction force of the waistline elastic body 44 does not act are defined in the central portion in the lateral direction X, and the waistline elastic body 44 is formed on both sides of the front and back waistline members 6 and 7. The front and rear elastic regions 64 and 65 on which the contractile force acts are defined. In order to shrink the central portion of the waistline elastic body 44 as described above, the waistline elastic body 44 is not fixed to the opposing surfaces of the inner and outer surface sheets 41 and 42 by an adhesive at the center portion. The cutting at the center of the waistline elastic body 44 is preferably cutting by applying heat or cutting by using a cutter.

In the front and rear inelastic regions 61 and 62, the printing surfaces of the graphics 54 and 55 are opposed to the skin facing surface of the outer sheet 42, and are fixed to both the inner and outer sheets 41 and 42 of the waistline elastic body 44 with an adhesive. The end portions 44a that are not free and have lost the contractibility are located on both side edges 51a and 51b in the lateral direction X of the front and rear graphic sheets 51 and 52.
The end 44a of the waistline elastic body 44 does not have contractility, while the portion 44b other than the end 44a has contractility. In this diaper 1, the end 44 a of the waistline elastic body 44 having no contractibility is between the front and rear graphic sheets 51 and 52 and the outer surface sheet 42, and both side edges thereof from the outside of the front and rear graphic sheets 51 and 52. The graphic sheets 51 and 52 extend across the 51a and 51b. In addition, the portion 44b of the waist elastic body 44 having contraction also extends from the outside of the front and rear graphic sheets 51 and 52 to the inside of the graphic sheets 51 and 52 across both side edges 51a and 51b. Further, the end 44 a of the waistline elastic body 44 is located between both side edges 51 a and 51 b of the front and rear graphic sheets 51 and 52 and the front and rear graphics 54 and 55.

  According to such a diaper 1, the non-shrinkable end portion 44 a of the waistline elastic body 44 is located in the front and rear inelastic regions 61 and 62, and is between the front and rear graphic sheets 51 and 52 and the outer surface sheet 42. Since the front and rear graphic sheets 51 and 52 extend from the outside of the front and rear graphic sheets 51 and 52 to the inside of the front and rear graphic sheets 51 and 52, the end 44 a of the waist elastic body 44 is attached to the non-skin of the outer surface sheet 42. It can be visually recognized from the facing surface. In addition, since the end 44a of the waistline elastic body 44 is located between both side edges 51a, 51b of the front and rear graphic sheets 51, 52 and the front and back graphics 54, 55, the end 44a of the waistline elastic body 44 is If the end 44a overlaps with the front and rear graphics 54 and 55, the length of the non-shrinkable end 44a generated by snap-back is too long. When the ends 44a do not overlap the side edges 51a and 51b, the length of the waistline elastic body 44 in the lateral direction X is too short, and in either case, the cutting or cutting of the waistline elastic body 44 is defective. I understand that. Therefore, it is possible to easily visually check whether or not the waistline elastic body 44 is appropriately cut or excised using the graphic.

Since the front and rear graphics 54 and 55 of the front and rear waist members 6 and 7 are arranged in the front and rear inelastic regions 61 and 62, the occurrence of wrinkles in the front and rear graphics 54 and 55 due to the contraction force of the waist elastic body 44 is suppressed. Can do. Therefore, the front and rear graphics 54 and 55 are not difficult to see.
As shown in FIG. 3, the front and rear inelastic regions 61 and 62 are disposed so as to overlap the core member 32 (see FIG. 3). Therefore, in the overlapped portion, the core member 32 also has the waist elastic body 44. It is possible to prevent wrinkles from being generated in the core material 32 without the contraction force acting. Therefore, it is possible to prevent excrement from leaking due to generation of wrinkles in the core member 32.
Although not shown, when the width of the core member 32 and the widths of the front and rear graphic sheets 51 and 52 are substantially equal in the horizontal direction X, the front and rear graphic sheets 51 and 52 and the liquid absorbing structure 31 overlap each other. The end 44a of the waistline elastic body 44 is visually inspected when the portion 44b of the waistline elastic body 44 having shrinkage crosses both side edges 51a, 51b of the front and rear graphic sheets 51, 52. A part of the elastic regions 64 and 65 and a part of the front and rear inelastic regions 61 and 62 overlap on the core member 32, and the core member 32 is pressed against the wearer by the waist elastic body 44. Can be easily confirmed.

The front and rear inelastic regions 61 and 62 can be defined simply by cutting and contracting the central portion of the waistline elastic body 44 attached in an extended state, and the definition is easy.
Moreover, it is preferable to perform the cutting | disconnection of the waist elastic body 44 only at one place. If the waistline elastic body 44 is cut only at one place, the inner and outer surface sheets 41 and 42 and the portions not joined to the front and rear graphic sheets 51 and 52 are contracted by their own contraction force, and the inner and outer surface sheets 41 and 42 and The end portion 44a that has lost its contraction force remains on the front end side of the portion joined to the front and rear graphic sheets 51 and 52. Therefore, if the waistline elastic body 44 is cut at a plurality of locations, scraps of the waistline elastic body 44 are generated, and the scraps may remain on the diaper 1 and the end portion 44a may be mistakenly recognized. There is no fear. In addition, when the waistline elastic body 44 is cut, it is preferable to cut at the center portion of the portion that is not joined to the inner and outer surface sheets 41 and 42 and the front and rear graphic sheets 51 and 52. By cutting in this way, the length of the portion where the contraction force is lost can be made the same at both end portions 44a in the lateral direction X. The cutting location is not limited to one, and the cutting is not limited to the central portion of the portion that is not joined to the inner / outer surface sheets 41 and 42 and the front and rear graphic sheets 51 and 52.

  The front and rear inelastic regions 61 and 62 can also be defined by cutting the center portion of the waistline elastic body 44 over a range corresponding to the front and rear inelastic regions 61 and 62. Also in this case, it is necessary that the range to be cut is not fixed to the opposing surfaces of the inner and outer surface sheets 41 and 42 by an adhesive.

  Since the front and rear graphics 54 and 55 are formed in the center portion in the lateral direction X in both the front and rear waistline members 6 and 7, the front and rear graphics 54 and 55 can be easily visually recognized. However, the graphics 54 and 55 may be formed only on one of the front and rear waistline members 6 and 7.

  Although not shown in the drawing, the line drawing portions of the front and rear graphics 54 and 55 may be black, or the line writing portion and the inside of the line drawing may be black, while the waistline elastic body 44 may be white. As described above, if the brightness of the waistline elastic body 44 is increased while the brightness of the lined portions of the front and rear graphics 54 and 55 is lowered, and the brightness of the front and back graphics 54 and 55 and the waistline elastic body 44 is different, the waistline elasticity The visibility of the end 44a of the body 44 can be improved. Of course, the hue may be changed not only when the brightness is different. For example, if the line drawing portions of the front and rear graphics 54 and 55 are made yellow while the waistline elastic body 44 is made blue and the front and back graphics 54 and 55 and the waistline elastic body 44 are in a complementary color relationship, the end 44a is visually recognized. The property can be further improved. Of course, the saturation may be changed instead of changing the brightness and hue. In addition to changing any one of hue, lightness, and saturation, a plurality of them may be changed. Further, the front and rear graphics 54 and 55 are not limited to characters, but may be characters, figures, symbols, or the like. Further, the end 44 a of the waistline elastic body 44 is not positioned between the side edges 51 a and 51 b of the front and rear graphic sheets 51 and 52 and the front and rear graphics 54 and 55 but positioned on the front and rear graphics 54 and 55. Also good. According to such a diaper, the end 44a of the waistline elastic body 44 can be more easily recognized.

  Further, the diaper 1 is not necessarily formed symmetrically with respect to the virtual vertical center line P. For example, in the lateral direction X, the waistline elastic body 44 can be cut by being biased to either the left side or the right side instead of the center portion. Thus, the cutting of the waistline elastic body 44 can be biased, and the length in the lateral direction X of the end part 44a that has lost its contractibility can be changed. For example, the end part 44a of one waistline elastic body 44 in the lateral direction X One end 44a of the other waistline elastic body 44 in the lateral direction X is positioned on the front and rear graphics 54 and 55, and the front and rear graphics 54 and 55 and both side edges 51a and 51a of the front and rear graphic sheets 51 and 52, respectively. 51b and can be arranged so as not to be positioned on the front and rear graphics 54 and 55. By arranging in this way, it is possible to visually recognize whether or not cutting or the like has been normally performed by comparing the end portion 44a with the left and right in the lateral direction X.

Further, as shown in FIG. 6, for example, the inner sheet 41 and the rear graphic sheet 52 are formed by setting the application direction of the first hot melt adhesive (first adhesive) 71 to be applied in a wave shape to the inner sheet 41 in the lateral direction X. On the other hand, for example, the inner sheet 41 and the liquid absorbing structure 31 are bonded with the application direction of the second hot melt adhesive (second adhesive) 72 applied in a wave shape to the liquid absorbing structure 31 as the longitudinal direction Y. . Thus, the application direction of the first hot melt adhesive 71 that joins the inner surface sheet 41 and the rear graphic sheet 52 and the application of the second hot melt adhesive 72 that joins the inner surface sheet 41 and the liquid absorbing structure 31. By crossing the direction, wrinkles generated in the rear graphic sheet 52 can be suppressed, and the waistline elastic body 44 on the rear graphic sheet 52 can be easily seen. By combining the width of the sheet 52 and the width of the core member 32, not only the back graphic sheet 52 but also wrinkles generated in the core member 32 can be suppressed, and the absorption efficiency can be increased.
Of course, the application pattern of the adhesive is not limited to a wave shape, and may be another shape such as an Ω shape. Further, the front graphic sheet 51 may be joined to the inner surface sheet 41 in the same manner.

[Second Embodiment]
FIG. 7 is a front view of a main part of a diaper 100 according to the second embodiment of the present invention. Since the basic configuration of the present embodiment is the same as that of the first embodiment, the same components are denoted by the same reference numerals, description thereof is omitted, and only differences will be described below.

Three graphics 154 and 159 are displayed in the horizontal direction X on the front graphic sheet 151 of the diaper 100. A central graphic 154 is arranged at the central portion in the horizontal direction X, and side graphic 159 is arranged on both sides in the horizontal direction X.
As shown, the side graphic 159 is relatively small in the horizontal direction X, while the central graphic 154 is relatively large in the horizontal direction X.
Further, the end portion 44 a that has lost the contractibility of the waistline elastic body 44 is disposed on the side graphic 159.

  According to the diaper 100 of the present invention, the front graphic sheet 151 has at least a central graphic 154 and side graphics 158 and 159 arranged on both sides of the central graphic 154, respectively. The shrinkable end portion 44 a is located in the non-elastic region 61 and is between the graphic sheet 151 and the outer sheet 42, and both side edges 51 a and 51 b of the graphic sheet 151 in the non-elastic region 61 and the central graphic. 154, the end 44a of the waistline elastic body 44 can be viewed from the non-skin facing surface of the outer sheet 42. Therefore, it is possible to visually recognize the end portion 44a of the waistline elastic body 44 and easily visually check whether or not the waistline elastic body 44 has been appropriately cut or cut using a graphic.

  In addition, in the horizontal direction X, the side graphic 159 is relatively small, while the central graphic 154 is relatively large, so that the uncomfortable feeling that the side graphic 159 exists can be suppressed.

  The difference in size between the side graphic 159 and the central graphic 154 is not limited to the horizontal direction X, and may be different in the vertical and horizontal directions.

In the diaper 100, the line drawing portion of the side graphic 159 may be black, or the line writing portion and the inside of the line drawing may be black. If the waistline elastic body 44 is white, the brightness of the waistline elastic body 44 and the side graphic 159 is different, so that the visibility of the end 44a of the waistline elastic body 44 can be improved. In addition, if only the line-written portion of the central graphic 154 is black or colored, the uncomfortable feeling of the previous graphic sheet 151 can be suppressed.
Of course, the waistline elastic body 44 and the side graphic 159 may change not only the brightness but also the hue or the saturation. In addition to changing any one of hue, lightness, and saturation, a plurality of them may be changed.
Furthermore, the number of graphics 154, 158, and 159 provided on the previous graphic sheet 151 is not limited to three, and may be four or more. Further, the side graphic 159 does not need to be provided on both sides of the central graphic 154, and only one of them may be provided.
In addition, although the description has been made with the pre-graphic sheet 151 provided on the front waistline member 6, although not illustrated, the graphic sheet 151 may be applied to a post-graphic sheet provided on the rear waistline member 7.

Next, an example of a method for measuring the light transmittance of the outer sheet 42 will be described below.
The light transmittance is measured as follows using, for example, a cross light metering color difference meter Z-300A manufactured by Nippon Denshoku Industries Co., Ltd.
First, measurement is performed in a state where a shielding object that shields light is arranged between one detection unit and another detection unit, and zero correction is performed.
Next, after removing a shielding object arranged between one detection unit and another detection unit, measurement is performed in a state where there is nothing blocking light, and standard correction is performed.
Next, the outer surface sheet 42 having the front and rear waist elastic body 44 as the object is measured in a state where the outer sheet 42 is disposed between one detection unit and another detection unit.

For example, a diaper 1 that is a laminate of a spunbond fiber nonwoven fabric, a meltblown fiber nonwoven fabric, and a spunbond fiber nonwoven fabric, an SMS fiber nonwoven fabric, a spunbond fiber nonwoven fabric, and an air-through fiber nonwoven fabric, and using these for the outer sheet 42 The visibility of the waist elastic body 44 was confirmed. The waistline elastic body 44 was made of 320 dtex and snapped back at a predetermined position while being stretched 3.2 times.
The first object is an SMS fiber nonwoven fabric having a mass of 10 g / m ² , the second object is an SMS fiber nonwoven fabric having a mass of 13 g / m ² , and the third object is a spunbond having a mass of 17 g / m ² . The fourth object is an air-through fiber nonwoven fabric having a mass of 30 g / m ² , and the fifth object is an air-through fiber nonwoven fabric having a mass of 60 g / m ² .

  The light transmittance of the first object is 87.3%, the second object is 83.2%, the third object is 84.4%, and the fourth object is It was 73.2%, and the fifth object was 56.8%.

  In the fourth and fifth objects, the end 44a of the front-rear waist elastic body 44 is difficult to see, and in the first to third objects, the end 44a of the front-rear waist elastic body 44 is easy to see. As a result of conducting the same experiment with respect to other fiber nonwoven fabrics, if the light transmittance is less than 75%, the end portion 44a is difficult to see. On the other hand, if the light transmittance is 75% or more, the end portion 44a is easily visible. Furthermore, if the light transmittance is 83% or more, it is easier to visually recognize the end 44a.

In addition, the diaper 1 and 100 can be changed suitably in the range of this invention, and is not limited to embodiment mentioned above. For example, the present invention is not limited to the diaper 1,100, but can also be applied to defecation training pants, incontinence briefs, and the like.
Furthermore, although embodiment mentioned above demonstrated the underpants type diaper 1,100, it is also possible to apply to what is called an open type diaper.
In the above-described embodiment, the inner sheet 41 and the outer sheet 42 may be joined by a hot melt adhesive applied to either one of the sheets, or both the inner and outer sheets 41 and 42 may be hot melted. An adhesive may be applied and bonded. Further, the inner and outer surface sheets 41 and 42 do not need to be joined with an adhesive such as a hot melt adhesive. For example, a heat fusion sheet is provided between the inner and outer surface sheets 41 and 42 and the heat fusion sheet is provided. You may join by applying heat. Of course, there is no need to apply heat in this way, and bonding may be performed by a sonic seal.
Further, the inner and outer surface sheets 41 and 42 need not be divided into the front waistline member 6 and the rear waistline member 7, and a series of sheets extending from the front waist region 11 to the rear waist region 12 may be used.
Furthermore, the numerical values such as the expansion ratio relating to the waistline elastic body 44 are not limited to those described above, and can be changed as appropriate.

Moreover, you may provide the recessed part dented from the non-skin opposing surface side toward the skin opposing surface side in the non-skin opposing surface side of the front and back graphic sheets 51, 52, 151.
As an example of forming the concave portion, the surface treatment device formed from the discharge electrode and the dielectric coating roll having a large number of convex portions on the peripheral surface is used, and the treatment is performed by repeating pulse corona discharge. The discharge electrode and the dielectric coating roll are arranged to face each other with a certain gap, and the graphic sheet is provided with an air gap between the lower surface side of the graphic sheet and the discharge electrode while the graphic sheet is in close contact with the roll. Pass the sheet through. A local breakdown occurs between the discharge electrode and the convex portion of the roll, and discharge starts from the discharge electrode toward the convex portion of the roll. Then, concave portions are formed in the graphic sheets 51, 52, 151 due to the current discharged to the convex portions.
If the concave portions are formed in the graphic sheets 51, 52, 151 as described above, the bonding between the inner and outer surface sheets 41, 42 and the graphic sheets 51, 52, 151 by a hot melt adhesive or the like can be strengthened.

In addition to the materials described in the present specification, the members constituting the diapers 1 and 100 are not limited to known materials that are commonly used in this type of field, unless otherwise specified. Can be used.
In addition, the terms “first” and “second” used in the present specification are merely used to distinguish similar elements, positions, and the like.

DESCRIPTION OF SYMBOLS 1 Diaper 31 Liquid absorption structure 41 Inner surface sheet 42 Outer surface sheet 44 Girth circumference elastic body 44a End part 51 Front graphic sheet (graphic sheet)
52 Rear graphic sheet (graphic sheet)
54 Previous graphic (graphic)
55 Rear graphic (graphic)
51a Both side edges 52a Both side edges 71 First hot melt adhesive (first adhesive)
72 Second hot melt adhesive (second adhesive)
151 Graphic sheet 154 Center part graphic 159 Side part graphic X Horizontal direction

Claims (2)

An inner sheet positioned on the skin facing surface side, an outer sheet positioned on the non-skin facing surface side, the inner surface sheet having a skin facing surface and a non-skin facing surface; A waistline elastic body that is interposed between the outer surface sheets and extends in the lateral direction of the front and rear waistline members and has contractility, a non-elastic region in which the waistline elastic body is not provided, and a graphic that is visible from the outer surface sheet In a disposable diaper comprising a graphic sheet having a liquid absorbing structure,
An end portion of the waistline elastic body extends between the graphic sheet and the outer sheet, extends from the outside of the graphic sheet to the inside of the graphic sheet across both side edges thereof,
The side of the non-skin facing surface of the graphic sheet has a concave portion recessed toward the side of the non-skin-facing surface to the side of the skin-facing surface,
The application direction of the first adhesive that joins the inner surface sheet and the graphic sheet intersects the application direction of the second adhesive that joins the inner surface sheet and the liquid absorbing structure. Diapers.   The first adhesive is applied in a wave shape to the inner surface sheet, and the inner surface sheet and the graphic sheet are joined, and the second adhesive is applied in a wave shape to the liquid absorbing structure, The diaper according to claim 1, wherein the liquid absorbing structure is joined.

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