JP6860295B2 - Absorbent article - Google Patents

Description

The present invention relates to an absorbent article having a decorative print on a liquid impermeable sheet.

Conventionally, in absorbent articles such as disposable diapers and sanitary napkins, it is known that decorative printing such as characters and patterns is provided on a liquid-impermeable sheet so that it can be visually recognized from the outer surface of the product (Patent Document 1 [Patent Document 1 []. 0006] [0007]).

Then, when the absorbent article is manufactured using the liquid-impermeable sheet having such decorative printing, the transport control of the liquid-impermeable sheet is performed so that the position of the decorative printing does not shift. That is, a register mark (register mark) is pre-printed on each unit portion together with decorative printing on the original roll of the continuous strip-shaped liquid-impermeable sheet in which the unit portion to be incorporated in each article is repeatedly continuous. After the liquid-impermeable sheet is unwound from this raw fabric roll, it is marked by an optical detection device such as a phototube at the appropriate place until the liquid-impermeable sheet is cut at the product assembly line. Is detected, and based on the detection result (for example, according to the deviation of the register mark position with respect to the cutting position), the draw control (tension control) of the liquid impermeable sheet is performed. By such transfer control, it is possible to prevent the position shift of the decorative printing due to the change in the elongation rate of the liquid-impermeable sheet.

However, in position detection using the register mark, in order to avoid false detection, the MD direction (conveyance) is within the range of the registration mark in the CD direction (horizontal direction orthogonal to the transport direction; width direction in most products). Orientation. In most products, the front-back direction.) No other printing is applied, or the shape, pattern or color is limited, so that the freely decorable range on the liquid-impermeable sheet is limited. There was a limit.

Japanese Unexamined Patent Publication No. 2005-315651

Therefore, a main object of the present invention is to expand the range of decorative printing when the liquid-impermeable sheet has registration mark printing and decorative printing.

A typical aspect of the present invention that solves the above problems is as follows.
<First aspect>
It has an absorber, a liquid-permeable top sheet that covers the front side of the absorber, a liquid-impermeable sheet that covers the back side of the absorber, and a cash register mark and an inner decorative print printed on the liquid-impermeable sheet. , In absorbent articles
The liquid-impermeable sheet has the registration mark in the registration mark area having a width wider than the registration mark and extending in the entire front-rear direction, and does not have the inner decorative printing.
An outer member having a portion overlapping the registration mark region is provided on the side of the liquid permeable sheet opposite to the absorber.
The outer member has an outer decorative print at a portion overlapping the cash register mark area.
An absorbent article, characterized in that.

(Action effect)
In order to avoid misrecognition of the cash register mark on the liquid impermeable sheet, it is best not to apply the inner decorative printing to the cash register mark area on the liquid impermeable sheet at all. Therefore, in the present invention, without breaking this basic idea, the idea is changed, and the decorative printing of the entire article is not composed only by the inner decorative printing of the liquid-impermeable sheet, but in the outer member of the liquid-impermeable sheet. By applying the outer decorative printing to the part overlapping the cash register mark area, the outer decorative printing appears in the part overlapping the cash register mark area when viewed from the outer surface, as if the inner decorative printing was provided to the cash register mark area. The decorative effect of is obtained. Therefore, according to the present invention, it is possible to expand the decorative printing range when the liquid-impermeable sheet has the registration mark printing and the decorative printing.

<Second aspect>
The area of the liquid-impermeable sheet that overlaps with the outer member does not have the inner decorative print.
The absorbent article of the first aspect.

(Action effect)
In this way, if the outer member having the outer decorative print and the inner decorative print are configured so as not to overlap each other, the inner decorative print is partially applied to the outer member even if the outer member uses a member having low visible light transmission. It is preferable because it is hidden and does not deteriorate in appearance. Further, when the area having no inner decorative printing is provided in this way, if the position is displaced, the inner decorative printing may overlap with the outer member, but the liquid permeable sheet is provided with a register mark. Since positioning can be performed using this register mark, misalignment of the area that does not have the inner decorative print is unlikely to occur.

<Third aspect>
The inner decorative print is a continuous decorative print composed of a large number of structural units that are regularly repeated in the front-rear direction and the width direction, and the outer decorative print is an intermittent decorative print arranged only on one or both of the front and rear of the product. Is,
The absorbent article of the first or second aspect.

(Action effect)
Decorative printing for absorbent articles includes continuous decorative printing consisting of a large number of structural units such as characters and patterns that repeat regularly in the front-back direction and width direction, as well as front and back of the product such as product logos and character drawings. There are intermittent decorative prints that are placed on only one or both. In continuous decorative printing, even if the cutting positions of the front and rear ends are slightly deviated, there is almost no effect on the appearance, but the misalignment between the members having continuous decorative printing is conspicuous, and the appearance is deteriorated. On the other hand, when intermittent decorative printing is performed during continuous decorative printing, the difference between the two is not noticeable. Therefore, when the member having the inner decorative print and the member having the outer decorative print are separated, it is desirable that the inner decorative print is the continuous decorative print and the outer decorative print is the intermittent decorative print as described above.

<Fourth aspect>
Only one register mark area is provided in the middle portion in the width direction.
The outer member and the outer decorative print are arranged so as to include a portion overlapping the register mark region on at least one of the front side of the absorbent article from the center in the front-rear direction and the rear side from the center in the front-rear direction.
An absorbent article according to any one of the first to third aspects.

(Action effect)
When the register mark region is located at both ends in the width direction of the liquid impermeable sheet, the printable range of the inner decorative print is remarkably narrowed, and it becomes difficult to compensate by the outer decorative print of the outer member. Further, if the registration mark region is located at one end of the liquid impermeable sheet in the width direction, it becomes difficult to balance the left and right in appearance. Therefore, it is desirable that they are arranged as described above.

<Fifth aspect>
A discoloring indicator that comes into contact with the liquid content of excrement is provided on the side of the absorber in the register mark region of the liquid impermeable sheet.
Does not have the outer decorative print in the area overlapping the indicator,
An absorbent article according to any one of the first to fourth aspects.

(Action effect)
The cash register mark area can be used as an indicator installation area because it is an area that does not have an inner decorative print, although it is possible to apply an outer decorative print over the entire area or to avoid the cash register mark and apply an outer decorative print. However, by not providing the outer decorative print in the area overlapping the indicator, the cash register mark, the decorative print, and the indicator can be efficiently arranged. (Indicators are generally provided over a wide area in the longitudinal direction of the absorbent article.)

<Sixth aspect>
It is provided with an exterior body that individually or individually constitutes the front body and the rear body, and an interior body that is attached to the exterior body.
The interior body includes an absorber, a liquid-permeable top sheet that covers the front side of the absorber, a liquid-impermeable sheet that covers the back side of the absorber, and a cash register mark and an inside printed on the liquid-impermeable sheet. With decorative printing,
It has side seals, which are the parts where both sides of the exterior body on the front body and both sides of the exterior body on the back body are joined.
A pants-type disposable diaper having an annular waist circumference, a waist opening, and a pair of left and right leg openings.
The outer member is a printing sheet having the outer decorative printing, which is interposed inside the outer body or between the inner body and the outer body.
An absorbent article according to any one of the first to fifth aspects.

(Action effect)
As described above, pants-type disposable diapers generally consist mainly of an exterior body and an interior body, and a liquid-impermeable sheet is built in the interior body. Further, since it is common to interpose a printing sheet inside the exterior body or between the interior body and the exterior body, it is one preferable form to perform exterior decorative printing using this printing sheet.

<7th aspect>
It has an absorber, a liquid-permeable top sheet that covers the front side of the absorber, a liquid-impermeable sheet that covers the back side of the absorber, and a cash register mark and an inner decorative print printed on the liquid-impermeable sheet. And
Fastening tapes on both sides of the dorsal side,
A target tape provided on the ventral outer surface to which the fastening tape is detachably fixed, and
It is a tape type disposable diaper equipped with
The outer member is the target tape.
An absorbent article according to any one of the first to fifth aspects.

(Action effect)
Since the target tape in the tape-type disposable diaper is located outside the liquid-impermeable sheet and is a member suitable for printing, it is one preferable form to perform outer decorative printing using this member.

As described above, according to the present invention, there are advantages such as being able to expand the decorative printing range when the liquid-impermeable sheet has the registration mark printing and the decorative printing.

It is a developed state plan view which shows the inner surface of a pants type disposable diaper. It is a developed state plan view which shows the outer surface of a pants type disposable diaper. It is a cross-sectional view of 2-2 of FIG. It is a cross-sectional view of 3-3 of FIG. (A) is a 4-4 cross-sectional view of FIG. 1, and (b) is a 5-5 cross-sectional view of FIG. It is a perspective view of a pants type disposable diaper. It is a developed state plan view which shows the outer surface of a pants type disposable diaper. (A) is a 4-4 cross-sectional view of FIG. 7, and (b) is a 5-5 cross-sectional view of FIG. It is a developed state plan view which shows the inner surface of a tape type disposable diaper. It is a developed state plan view which shows the outer surface of a tape type disposable diaper. 6-6 is a sectional view taken along the line 6-6 of FIG. 9 is a cross-sectional view taken along the line 7-7 of FIG. 8-8 is a sectional view taken along the line 8-8 of FIG. 9-9 is a cross-sectional view taken along the line 9-9 of FIG. It is a cross-sectional view of 10-10 of FIG. It is a top view of the liquid impermeable sheet in a pants type disposable diaper. It is a top view of the liquid impermeable sheet in a pants type disposable diaper. It is a top view of the liquid impermeable sheet in a tape type disposable diaper. It is a perspective view which shows the registration mark detection procedure of the liquid impermeable sheet.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dotted pattern portion in the cross-sectional view shows an adhesive as a joining means for joining the constituent members located on the front side and the back side thereof, and is a solid, bead, curtain, summit or spiral coating of hot melt adhesive, or pattern coating. The fixed portion of the elastic stretchable member is formed by (transfer of hot melt adhesive by the letterpress method) or the like, or by coating the elastic stretchable member on the outer peripheral surface of the elastic stretchable member such as comb gun or sure wrap coating instead of or together with this. It is a thing. Examples of the hot melt adhesive include EVA type, adhesive rubber type (elastomer type), olefin type, polyester / polyamide type and the like, but they can be used without particular limitation. As a joining means for joining each component, a means by material welding such as a heat seal or an ultrasonic seal can also be used.

<Example of pants-type disposable diapers>
1 to 6 show a pants-type disposable diaper 100. This pants type disposable diaper 100 extends from the front exterior body 12F constituting the front body F, the rear exterior body 12B constituting the rear body B, and the rear exterior body 12B from the front exterior body 12F through the crotch portion. As described above, the interior body 200 provided inside the exterior bodies 12F and 12B is provided, and both side portions of the front exterior body 12F and both side portions of the rear exterior body 12B are joined to form the side seal portion 12A. As a result, the openings formed by the front and rear ends of the exterior bodies 12F and 12B become waist openings WO through which the wearer's body passes, and the lower edges of the exterior bodies 12F and 12B and the interior body 200 on both sides in the width direction of the interior body 200. The portion surrounded by the side edges of the legs is the leg opening LO through which the legs pass. The interior body 200 is a part that absorbs and holds excrement such as urine, and the exterior bodies 12F and 12B are parts for supporting the interior body 200 with respect to the wearer's body. Further, the reference numeral Y indicates the total length of the diaper in the unfolded state (the length in the front-rear direction from the edge of the waist opening WO of the front body F to the edge of the waist opening WO of the rear body B), and the reference numeral X indicates the diaper in the unfolded state. Shows the full width of.

Further, the pants-type disposable diaper 100 of this embodiment forms a waist circumference region T defined as a front-rear direction range (a front-back direction range from the waist opening WO to the upper end of the leg opening LO) having a side seal portion 12A, and a leg opening LO. It has an intermediate region L defined as a front-rear direction range (between a front-rear direction region having a side seal portion 12A of the front body F and a front-rear direction region having a side seal portion 12A of the back body B). The waist circumference region T can be divided into a "waist portion" W that conceptually forms an edge portion of the waist opening and a "waist lower portion" U that is a portion below the waist portion. Normally, when there is a boundary in the waist circumference region T where the stretching stress in the width direction changes (for example, the thickness and elongation rate of the elastic stretching member change), the waist portion is located on the waist opening WO side more than the boundary on the waist opening WO side. W, and if there is no such boundary, the waist opening WO side of the absorber 56 or the interior body 200 is the waist portion W. The length in the front-rear direction varies depending on the size of the product and can be appropriately determined. For example, the waist portion W can be 15 to 40 mm and the waist lower portion U can be 65 to 120 mm. On the other hand, both side edges of the intermediate region L are constricted in a U-shape or a curved shape along the circumference of the wearer's legs, and this is a portion for inserting the wearer's legs. As a result, the unfolded pants-type disposable diaper has an hourglass shape as a whole.

(Interior body)
The interior body 200 can take any shape, but is rectangular in the illustrated form. As shown in FIGS. 3 to 5, the interior body 200 includes a top sheet 30 on the body side, a liquid-impermeable sheet 11, and an absorbing element 50 interposed between them. Yes, it is the main body that has an absorption function. Reference numeral 40 indicates an intermediate sheet (second sheet) provided between the top sheet 30 and the absorption element 50 in order to quickly transfer the liquid that has passed through the top sheet 30 to the absorption element 50. Shows three-dimensional gathers 60 standing on the body side provided on both sides of the interior body 200 in order to prevent excrement from leaking to both sides of the interior body 200.

The interior body 200 can be fixed to the exterior bodies 12F and 12B by means of joining by material welding such as heat sealing and ultrasonic sealing, or by a hot melt adhesive. In the illustrated embodiment, the back surface of the interior body 200, that is, in this case, the back surface of the liquid-impermeable sheet 11 and the mounting portion 65 of the three-dimensional gather 60 are fixed to the inner surfaces of the exterior bodies 12F and 12B by a hot melt adhesive. Has been done. The inner / outer fixing portions 201 for fixing the interior body 200 and the exterior bodies 12F and 12B can be provided in almost the entire region where the interior body 200 and the exterior bodies 12F and 12B overlap, and are usually provided in a portion of the interior body excluding both ends in the width direction. preferable.

(Top sheet)
The top sheet 30 has a property of allowing liquid to permeate, and examples thereof include a perforated or non-perforated non-woven fabric and a porous plastic sheet. Further, among these, the non-woven fabric is not particularly limited as to what the raw material fiber is. For example, olefin-based fibers such as polyethylene and polypropylene, synthetic fibers such as polyester-based and polyamide-based fibers, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers in which two or more of these are used. Etc. can be exemplified. Further, the non-woven fabric may be produced by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. For example, if flexibility and drapeability are required, the spunbond method and spunlace method are preferable, and if bulkiness and softness are required, the air through method, point bond method, and thermal bond method are preferable processing methods. ..

Further, the top sheet 30 may be made of one sheet or may be made of a laminated sheet obtained by laminating two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the plane direction.

When the three-dimensional gathers 60 are provided, both side portions of the top sheet 30 pass between the liquid-impermeable sheet 11 and the three-dimensional gathers 60 and wrap around to the back side of the absorbing element 50 to prevent the liquid from penetrating. It is preferable to join the transparent sheet 11 and the three-dimensional gather 60.

It is desirable that the top sheet 30 is fixed to a member adjacent to the back side by a joining means by material welding such as a heat seal or an ultrasonic seal or a hot melt adhesive for the purpose of preventing misalignment with respect to the back side member. .. In the illustrated form, the top sheet 30 is fixed to the surface of the intermediate sheet 40 and the surface of the portion of the packaging sheet 58 located on the front side of the absorber 56 by a hot melt adhesive applied to the back surface thereof.

(Intermediate sheet)
In order to quickly transfer the liquid that has permeated the top sheet 30 to the absorber, an intermediate sheet (also referred to as a "second sheet") 40 having a faster liquid permeation rate than the top sheet 30 can be provided. The intermediate sheet 40 not only rapidly transfers the liquid to the absorber to improve the absorption performance by the absorber, but also prevents the phenomenon of "return" of the absorbed liquid from the absorber, and constantly dries the top sheet 30. Can be in the state of The intermediate sheet 40 may be omitted.

Examples of the intermediate sheet 40 include the same materials as the top sheet 30, spunlace, spunbond, SMS, pulp non-woven fabric, mixed sheet of pulp and rayon, point bond or crepe paper. In particular, the air-through non-woven fabric is preferable because it is bulky. It is preferable to use a composite fiber having a core-sheath structure for the air-through non-woven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. Basis weight is preferably ^{20~80g / m 2, 25~60g / m} 2 is more preferable. The thickness of the raw material fiber of the non-woven fabric is preferably 2.0 to 10 dtex. In order to make the non-woven fabric bulky, it is also preferable to use eccentric fibers having no core in the center, hollow fibers, and eccentric and hollow fibers as mixed fibers of all or a part of the raw material fibers.

The intermediate sheet 40 of the illustrated form is arranged in the center shorter than the width of the absorber 56, but may be provided over the entire width. The length of the intermediate sheet 40 in the longitudinal direction may be the same as the length of the absorber 56, or may be within a short length range centered on the region for receiving the liquid.

It is desirable that the intermediate sheet 40 is fixed to a member adjacent to the back side by a joining means by material welding such as a heat seal or an ultrasonic seal or a hot melt adhesive for the purpose of preventing misalignment with respect to the back side member. .. In the illustrated form, the intermediate sheet 40 is fixed to the surface of the portion of the packaging sheet 58 located on the front side of the absorber 56 by the hot melt adhesive applied to the back surface thereof.

(Liquid impermeable sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited, but for example, a plastic film made of an olefin resin such as polyethylene or polypropylene, a laminated non-woven fabric in which a plastic film is provided on the surface of the non-woven fabric, or a plastic film. An example is a laminated sheet in which a non-woven fabric or the like is laminated and bonded to the surface. For the liquid-impermeable sheet 11, it is preferable to use a liquid-impermeable and moisture-permeable material that is preferably used from the viewpoint of preventing stuffiness. As a moisture-permeable plastic film, a microporous plastic film obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet and then stretching it in a uniaxial or biaxial direction. Is widely used. In addition to this, non-woven fabrics using microdenyl fibers, leakage-proof strengthening by reducing the voids of the fibers by applying heat or pressure, coating of highly water-absorbent resin or hydrophobic resin or water-repellent agent, etc. Therefore, a liquid-impermeable sheet without using a plastic film can also be used as the liquid-impermeable sheet 11.

As shown in the figure, the liquid-impermeable sheet 11 has a width that fits on the back side of the absorbing element 50, and in order to improve leakage resistance, both sides of the absorbing element 50 are wrapped around the side surface of the top sheet 30 of the absorbing element 50. It can also be extended to both sides. The width of the extending portion is appropriately about 5 to 20 mm on each of the left and right sides.

Further, an excretion indicator whose color changes due to absorption of the liquid can be provided on the inside of the liquid impermeable sheet 11, particularly on the side surface of the absorber 56.

(Three-dimensional gather)
The three-dimensional gather 60 is a band-shaped member extending in the entire front-rear direction along both side portions of the interior body 200, and is for blocking excrement that travels laterally along the top sheet 30 and prevents lateral leakage. It is provided in. The three-dimensional gather 60 of the present embodiment is provided so as to stand up from the side portion of the interior body 200, the portion on the base side stands up diagonally toward the center side in the width direction, and the portion on the tip side from the intermediate portion has a width. It stands diagonally toward the outside in the direction.

More specifically, in the three-dimensional gather 60, a strip-shaped gather sheet 62 having a length equal to the length in the front-rear direction of the interior body 200 is folded back in the width direction and folded in two, and between the folded portion and the sheets in the vicinity thereof. In addition, a plurality of elongated gather elastic elastic members 63 are fixed in an elongated state along the longitudinal direction at intervals in the width direction. The base end portion (the end portion opposite to the seat folded portion in the width direction) located on the opposite side of the tip portion of the three-dimensional gather 60 is a mounting portion 65 fixed to the back surface of the side edge portion of the interior body 200. The portion other than the mounting portion 65 is a protruding portion 66 (a portion on the folded-back portion side) protruding from the mounting portion 65. Further, the protruding portion 66 is composed of a root side portion facing the center side in the width direction and a tip side portion folded outward in the width direction from the tip of the root side portion. This form is a surface contact type three-dimensional gather, but a line contact type three-dimensional gather (not shown) that does not fold outward in the width direction can also be adopted. Of the protruding portions 66, both ends in the front-rear direction are in an inverted state and are fixed to the side surface of the top sheet 30, while the intermediate portion in the front-rear direction located between them is not fixed. A gather elastic elastic member 63 along the front-rear direction is fixed to the free portion 68 in an extended state.

In the free portion 68 of the three-dimensional gather 60, the inner layer and the outer layer of the gather sheet 62 are bonded together, and the gather elastic elastic member 63 sandwiched between them is fixed. At least one of the fixing means by material welding such as an ultrasonic seal can be used. If the entire inner and outer layers of the gather sheet 62 are bonded together, the flexibility is impaired. Therefore, it is preferable that the parts other than the adhesive portion of the gather elastic elastic member 63 are not adhered or are weakly adhered. In the illustrated embodiment, the hot melt adhesive is applied only to the outer peripheral surface of the gather elastic expansion / contraction member 63 by an application means such as a comb gun or a sure wrap nozzle, and the hot melt adhesive is sandwiched between the inner layer and the outer layer of the gather sheet 62 to obtain the gather elastic expansion / contraction. A structure in which the elongated elastic elastic member is fixed to the inner layer and the outer layer of the gather sheet 62 and the inner layer and the outer layer of the gather sheet 62 are fixed only by the hot melt adhesive applied to the outer peripheral surface of the member 63. It has become.

Further, for fixing the waterproof film 64 incorporated in the three-dimensional gather 60 and the gather sheet 62, and fixing the inverted portion 67 to the side surface of the interior body 200, hot melt adhesives and heat seals by various coating methods can be used. At least one of means by welding materials such as an ultrasonic seal can be used. In the illustrated form, slot coating of a hot melt adhesive is used to fix the waterproof film 64. Further, although the means for fixing the inverted portion 67 in the illustrated form is a combination of hot melt adhesive and material welding, these can be fixed only by one of the means.

As the gather sheet 62, a flexible, uniform and concealing non-woven fabric such as a spunbonded non-woven fabric (SS, SSS, etc.), an SMS non-woven fabric (SMS, SMSMS, etc.), a melt-blown non-woven fabric, etc., is water-repellent with silicone or the like, if necessary. The treated material can be preferably used, and the fiber texture is preferably about 10 to ^{30 g / m 2.} As the elongated elastic elastic member 63, thread rubber or the like can be used. When spandex thread rubber is used, the thickness is preferably 470 to 1240 dtex, more preferably 620 to 940 dtex. The elongation rate at the time of fixing is preferably 150 to 350%, more preferably 200 to 300%. The term "elongation rate" means a value when the natural length is 100%. Further, as shown in the drawing, the waterproof film 64 can be interposed between the gather sheets folded in two.

The number of elongated elastic elastic members 63 provided in the free portion of the three-dimensional gather 60 is preferably 2 to 6, and more preferably 3 to 5. The arrangement interval 60d is preferably 3 to 10 mm. With this configuration, it becomes easier for the elongated elastic elastic member 63 to come into contact with the skin in the area where the elongated elastic elastic member 63 is arranged. The elongated elastic elastic member 63 may be arranged not only on the tip side but also on the base side.

The object of fixing the mounting portion 65 of the three-dimensional gather 60 can be an appropriate member such as the top sheet 30, the liquid-impermeable sheet 11, and the absorbing element 50 in the interior body 200.

In the three-dimensional gather 60 thus configured, the contraction force of the elongated elastic elastic member 63 acts to bring both ends in the front-rear direction closer to each other, but both ends in the front-rear direction of the protruding portion 66 are fixed so as not to stand up. On the other hand, since there is a non-fixed free portion between them, only the free portion stands up so as to abut on the body side as shown in FIG. In particular, when the mounting portion 65 is located on the back side of the interior body 200, the three-dimensional gathers 60 stand up so as to open outward in the width direction in the crotch portion and its vicinity, so that the three-dimensional gathers 60 abut on the surface around the legs. And the fit will be improved.

The dimensions of the three-dimensional gather 60 can be appropriately determined, but in the case of baby diapers, for example, as shown in FIG. 3, the standing height of the three-dimensional gather 60 (the length in the width direction of the protruding portion 66 in the unfolded state) W6 is It is preferably 15 to 60 mm, particularly 20 to 40 mm. Further, the separation distance W3 between the innermost folds when the three-dimensional gather 60 is folded flat so as to be parallel to the surface of the top sheet 30 is preferably 60 to 190 mm, particularly 70 to 140 mm.

In addition, unlike the illustrated form, three-dimensional gathers may be provided in double (two rows) on each of the left and right sides of the interior body 200.

(Absorption element)
The absorbing element 50 has an absorbing body 56 and a packaging sheet 58 that encloses the entire absorbing body 56. The packaging sheet 58 may be omitted.

(Absorber)
The absorber 56 can be formed by an aggregate of fibers. The fiber aggregate is obtained by stacking short fibers such as cotton-like pulp and synthetic fibers, and by opening the tow (fiber bundle) of synthetic fibers such as cellulose acetate as necessary. Can also be used. The basis weight of fibers, when fiber stacking flocculent pulp or short fibers, for example, be a 100 to 300 g / m ² approximately, in the case of a filament aggregate, for example, be 30 to 120 g / m ² approximately Can be done. In the case of synthetic fibers, the fineness is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 5 dtex. In the case of a filament aggregate, the filament may be a non-crimped fiber, but is preferably a crimped fiber. The degree of crimping of the crimped fibers can be, for example, 5 to 75 fibers per 2.54 cm , preferably 10 to 50 fibers, and more preferably about 15 to 50 fibers. Further, in many cases, uniformly crimped crimped fibers are used. It is preferable to disperse and hold the highly absorbent polymer particles in the absorber 56.

The absorber 56 may have a rectangular shape, but as shown in FIGS. 1 and 2, the absorber 56 is located at the front end portion, the rear end portion, and between them, and has a constricted portion that is narrower than the front end portion and the rear end portion. It is preferable that the shape of the hourglass has an hourglass shape, because the fit of the absorber 56 itself and the three-dimensional gather 60 around the legs is improved.

The size of the absorber 56 can be appropriately determined as long as it extends from the front, back, left and right of the urination port position, but it is preferable that the absorber 56 extends to the peripheral edge of the interior body or its vicinity in the front-back direction and the width direction. Reference numeral 56X indicates the width of the absorber 56.

(Highly absorbent polymer particles)

The absorber 56 may contain highly absorbent polymer particles in part or all of it. The highly absorbent polymer particles include "powder" in addition to "particles". As the highly absorbent polymer particles 54, those used for this kind of disposable diaper can be used as they are, for example, sieving with a standard sieve (JIS Z8801-1: 2006) of 500 μm (shaking for 5 minutes). It is desirable that the proportion of particles remaining on the sieve is 30% by weight or less, and the proportion of particles remaining on the sieve is determined by sieving (shaking for 5 minutes) using a standard sieve of 180 μm (JIS Z8801-1: 2006). 60% by weight or more is desirable.

The material of the highly absorbent polymer particles can be used without particular limitation, but those having a water absorption of 40 g / g or more are preferable. Highly absorbent polymer particles include starch-based, cellulosic-based and synthetic polymer-based ones, which are starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and crosslinked sodium carboxymethyl cellulose. A substance or an acrylic acid (salt) polymer or the like can be used. As the shape of the highly absorbent polymer particles, a commonly used powder or granular material is preferable, but other shapes can also be used.

As the highly absorbent polymer particles, those having a water absorption rate of 70 seconds or less, particularly 40 seconds or less are preferably used. If the water absorption rate is too slow, so-called reversion, in which the liquid supplied into the absorber 56 returns to the outside of the absorber 56, is likely to occur.

Further, as the highly absorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. As a result, even when the bulky absorber 56 is used, the sticky feeling after liquid absorption can be effectively suppressed.

The basis weight of the highly absorbent polymer particles can be appropriately determined according to the amount of absorption required for the application of the absorber 56. Therefore, although it cannot be said unconditionally, it can be set to 50 to 350 g / m ² . If the basis weight of the polymer ^{is less than 50 g / m 2} , it becomes difficult to secure the absorption amount. Above 350 g / m ² , the effect saturates.

If necessary, the highly absorbent polymer particles can be adjusted in spray density or spray amount in the plane direction of the absorber 56. For example, the amount of liquid excreted at the site can be increased as compared with other sites. When considering the difference between men and women, the spray density (amount) on the front side can be increased for men, and the spray density (amount) on the central part can be increased for women. Further, it is also possible to provide a portion where the polymer does not exist locally (for example, in a spot shape) in the plane direction of the absorber 56.

(Packaging sheet)

When the packaging sheet 58 is used, as the material thereof, tissue paper, particularly crepe paper, non-woven fabric, non-woven fabric of polylami, a sheet having small holes, or the like can be used. However, it is desirable that the sheet does not allow the highly absorbent polymer particles to escape. When a non-woven fabric is used instead of the crepe paper, a hydrophilic SMS non-woven fabric (SMS, SMSMS, etc.) is particularly suitable, and polypropylene, polyethylene / polypropylene composite material, or the like can be used as the material. The basis weight is preferably 5 to 40 g / m ² , especially 10 to 30 g / m ² .

The packaging form of the packaging sheet 58 can be appropriately determined, but from the viewpoint of ease of manufacture and prevention of leakage of highly absorbent polymer particles from the front and rear edge edges, a cylinder is provided so as to surround the front and back surfaces and both side surfaces of the absorber 56. It is preferable that the components are wound in a shape, the front and rear edges thereof are projected from the front and rear of the absorber 56, and the overlapping portions and the overlapping portions of the front and rear protruding portions are joined by a joining means such as hot melt adhesive or material welding.

(indicator)
An indicator 80 that changes color when it comes into contact with the liquid content of excrement can be provided on the absorber side of the liquid impermeable sheet. The indicator 80 is colored by a colorant that shows a color reaction by contact with the liquid content of excrement and / or a colorant that detects the pH in water and shows a color reaction, or a reaction with a body fluid. Reaction that disappears, reaction in which the colorant dissolves (disperses) in urine and bleeds or disappears, or visual contact with ink or adhesive containing other visual changes, or water or body fluids. It is composed of a sheet-like member containing a drug (indicator reaction means) that exhibits a target change. For example, as a colorant that exhibits a color-developing reaction upon contact with water such as body fluid, a water-soluble, water-decomposable dye or a phenolic compound that develops a color of the leuco dye and an acidic substance, an electron-accepting substance, etc. It is possible to use a colorant composed of the color developer of.

The color that appears depending on the coloration is not particularly limited, but if it is the same color as the outer surface of the diaper (usually white), it will be difficult to see, so it is preferable that the color is different from the outer surface of the diaper.

The indicator 80, which is composed of the ink or adhesive described above, is applied to a predetermined coating area as shown in FIGS. 2 and 3. The indicator 80 shown in FIGS. 2 and 3 shows the above-mentioned ink or adhesive application region. This region is preferably included in the arrangement range of the absorber 56, is located in the central portion in the width direction, has a width of about 0.2 to 5 cm, preferably about 0.4 to 2 cm, and has a total length of the diaper L. It is a region of 20 to 70% of the above, and is a region where contact with excrement absorbed by the absorber 56 is efficiently performed. The indicator 80 is visible from the outer surface of the diaper between the back surface of the absorber 56 and the liquid-impermeable sheet 11, specifically, the side surface of the absorbent 56 of the liquid-impermeable sheet 11 or the inner surface of the packaging sheet 58. Alternatively, it is desirable to form the outer surface by applying the ink or adhesive constituting the indicator 80. The coating pattern is not particularly limited, and the coating can be applied in a strip shape as shown in FIG. 7, a large number of streaks as shown in FIG. 10, a surface shape, or a pattern consisting of other figures. In the case of a strip pattern, the coating width is 2 to 5 mm, and in the case of a large number of streaks, the coating width per streak is 1 to 2 mm, and about 2 to 4 strips are arranged at intervals of about 0.5 to 1.5 mm. Is preferable. Of course, a sheet on which the indicator 80 is formed can be manufactured separately, and the sheet-shaped indicator 80 can be incorporated in the diaper. It is preferable that the indicator 80 is arranged at a distance of 5 mm or more, particularly 10 mm or more from the decorative printing described later, because its discoloration is easy to understand.

When the indicator 80 is composed of ink, the component of the indicator 80 is a colorant added to the ink, and when the indicator 80 is composed of an adhesive, the water-soluble polymer or the hydrophilic polymer is made of a resin or the like. It is the one to which the water-insoluble component and the colorant are added. Specific examples of the case where it is composed of an adhesive are a water-soluble polymer composed of polyethylene glycol molecular weight 100 to 500, polyvinylpyrrolidone, vinyl acetate copolymer, and water-soluble polyester, and a highly polar tackifying resin and a water-insoluble plasticizer. It is composed of a sex component and a colorant that indicates the degree of acidity (pH) of the liquid in contact with the liquid by discoloration.

When the indicator 80 is composed of an adhesive, various known adhesives can be used as the adhesive. As an example, the case where a hot melt adhesive is used will be described in detail. By using a hot melt adhesive containing a colorant as the indicator 80, diffusion and leaching of the colorant can be prevented, and a sheet-like shape can be prevented. Compared with the case where the indicator is provided, it can be easily carried out in-line, so that the work process for attaching the indicator can be significantly reduced.

On the other hand, when the indicator 80 made of a sheet-like member is used, the sheet-like member is placed between the liquid-impermeable sheet 11 and the absorber 56, specifically between the absorber 56 and the inner surface of the packaging sheet 58. Alternatively, it is arranged between the back surface of the packaging sheet 58 and the liquid impermeable sheet 11. When this sheet-shaped indicator 80 is used, the number of members increases as compared with the case where the liquid indicator 80 is applied and provided, but it can be easily used in the required portion in the required amount. Therefore, the cost can be reduced by reducing the used area of the sheet-shaped member including the indicator reaction means.

(Exterior body)
The exterior bodies 12F and 12B are composed of a front exterior body 12F which is a part constituting the front body F and a rear exterior body 12B which is a part constituting the rear body B, and the front exterior body 12F and the rear exterior body 12B. Are not continuous on the crotch side and are separated in the front-back direction. The separation distance 12d can be about 150 to 250 mm. A part of the exposed portion on the back surface of the interior body 200 in this separated portion (for example, the entire portion exposed between the front exterior body 12F and the rear exterior body 12B in the front-rear direction, but does not extend to the front-rear end of the interior body 200. In addition, it is desirable to attach the crotch cover sheet 12M made of a non-woven fabric or the like so as to cover both sides of the interior body 200 so as not to reach both sides of the interior body 200 in the width direction, but it can be omitted. Further, as shown in FIGS. 7 and 8, the exterior body 12 may be integrated through the crotch from the front body F to the back body B. That is, the exterior bodies 12F and 12B that individually constitute the front body F and the back body B correspond to the former form, and the exterior body 12 that integrally constitutes the front body F and the back body B corresponds to the latter form. ..

The exterior bodies 12F and 12B have a waist circumference portion that is a range in the front-rear direction corresponding to the waist circumference region T. Further, in the present embodiment, the front exterior body 12F does not have a portion corresponding to the intermediate region L, but the rear exterior body 12B has a buttock cover portion 14 extending from the waist circumference region T to the intermediate region L side. doing. Although not shown, the front exterior body 12F may also be provided with an inguinal cover portion extending from the waist circumference region T to the intermediate region L side, or the front exterior body 12F and the front exterior body 12F may be provided with an inguinal cover portion but no groin cover portion. It is not necessary to provide a portion corresponding to the intermediate region L on both of the rear exterior body 12B. Further, in the illustrated embodiment, the lower edge of the buttock cover portion 14 is formed in a straight line along the width direction like the lower edge of the front exterior body 12F, but is located on the waist opening side toward the outside in the width direction. It can also be a curve that looks like this.

As shown in FIGS. 4, 5 and 8, the exterior bodies 12F and 12B are formed by joining the outer sheet layer 12S and the inner sheet layer 12H by a joining means such as hot melt adhesive or welding. The sheet material forming the outer sheet layer 12S and the sheet material forming the inner sheet layer 12H are a common sheet material as shown in FIG. 5, and are individually formed as shown in FIG. It can also be used as a sheet material. That is, in the former case, the inner sheet layer 12H and the outer sheet layer 12S are formed by the inner portion and the outer portion of one sheet material folded back at the edge of the waist opening WO (which may be the edge on the crotch side), respectively. Will be done. The former form has an advantage that the inner sheet layer 12H and the outer sheet layer 12S are not easily displaced when they are bonded together, and the latter form has an advantage that the number of sheet materials is small.

The sheet material used for the outer sheet layer 12S and the inner sheet layer 12H can be used without particular limitation, but a non-woven fabric is preferable. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, and two of these. A non-woven fabric made of mixed fibers, composite fibers, or the like in which seeds or more are used can be used. Further, the non-woven fabric may be produced by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. When a non-woven fabric is used, the basis weight is preferably about 10 to ^{30 g / m 2.}

Further, the total basis weight of the exterior bodies 12F and 12B is preferably about ^{20 to 60 g / m 2.}

(Expandable area / non-expandable area)
The exterior bodies 12F and 12B are provided with elongated elastic elastic members 15 to 19 such as thread rubber between the outer sheet layer 12S and the inner sheet layer 12H in order to improve the fit to the waist circumference of the wearer, and elastically expand and contract. An elastic region is formed that elastically expands and contracts in the width direction as the member expands and contracts. In this stretchable region, in the state of natural length, the outer sheet layer 12S and the inner sheet layer 12H contract with the contraction of the elastic stretchable member to form wrinkles or folds, and when stretched in the longitudinal direction of the elastic stretchable member, The outer sheet layer 12S and the inner sheet layer 12H can be stretched to a predetermined stretch rate without wrinkles. As the elongated elastic elastic members 15 to 19, synthetic rubber or natural rubber may be used.

For bonding the outer sheet layer 12S and the inner sheet layer 12H on the exterior bodies 12F and 12B and fixing the elongated elastic elastic members 15 to 19 sandwiched between them, hot melt adhesives and heat seals are used by various coating methods. At least one of the fixing means by material welding such as an ultrasonic seal can be used. If the entire surfaces of the exterior bodies 12F and 12B are firmly fixed, the flexibility is impaired. Therefore, it is preferable that the parts other than the adhesive portion of the elongated elastic elastic members 15 to 19 are not adhered or are weakly adhered. In the illustrated form, the hot melt adhesive is applied only to the outer peripheral surfaces of the elongated elastic elastic members 15 to 19 by a coating means such as a comb gun or a sure wrap nozzle, and sandwiched between the two sheet layers 12S and 12H to form the elongated shape. With only the hot melt adhesive applied to the outer peripheral surfaces of the elastic elastic members 15 to 19, the elongated elastic elastic members 15 to 19 can be fixed to both sheet layers 12S and 12H, and the elongated elastic elastic members 15 to 19 can be fixed between both sheet layers 12S and 12H. It is a structure to do. The elastic elastic members 15 to 19 can be fixed to the outer sheet layer 12S and the inner sheet layer 12H only at both ends in the expansion / contraction direction in the expansion / contraction region.

More specifically, between the outer sheet layer 12S and the inner sheet layer 12H in the waist portion W of the exterior bodies 12F and 12B, a plurality of waist elastic elastic members 17 are vertically spaced so as to be continuous over the entire width direction. It is installed with a space. Further, among the elastic elastic member 17 of the waist portion, one or a plurality of members arranged in the region adjacent to the lower waist portion U may overlap with the interior body 200, or may overlap with the interior body 200 in the width direction. It may be provided on both sides in the width direction except for the central portion. The waist elastic elastic member 17 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber, a cross-sectional area of 0.05 to 1.5 mm ^{2 in} the case of natural rubber, particularly 0.1 to 1). It is preferable to provide about 3 to 22 thread rubbers (about 0.0 mm ² ) at intervals of 4 to 12 mm, and the elongation rate of the waist portion W in the width direction is about 150 to 400%, particularly about 220 to 320%. It is preferable to have it. Further, the waist portion W does not need to use the elastic elastic elastic member 17 having the same thickness in all directions in the front-rear direction or to have the same elongation ratio. For example, the elastic elastic member 17 at the upper part and the lower part of the waist portion W The thickness and elongation rate may be different.

Further, between the outer sheet layer 12S and the inner sheet layer 12H in the waist lower portion U of the exterior bodies 12F and 12B, a plurality of waist lower elastic elastic members 15 and 19 made of elongated elastic elastic members are spaced in the vertical direction. It is installed with a space.

The elastic elastic members 15 and 19 at the lower part of the waist have a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , especially 0.1. It is preferable to provide about 5 to 30 elastic strips ( ^{about 1.0 mm 2} ) at intervals of 1 to 15 mm, particularly 3 to 8 mm, and the elongation rate of the lower waist portion U in the width direction is 200 to 350%. In particular, it is preferably about 240 to 300%.

Further, between the outer sheet layer 12S and the inner sheet layer 12H in the buttock cover portion 14 of the rear exterior body 12B, a plurality of cover portion elastic elastic members 16 made of elongated elastic elastic members are spaced apart in the vertical direction. It is attached.

The elastic elastic member 16 of the cover has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber, a cross-sectional area of 0.05 to 1.5 mm ^{2 in} the case of natural rubber, particularly 0.1 to 1. It is preferable to provide about 2 to 10 rubber threads of 5 to 40 mm ( ^{about 0 mm 2} ) at intervals of 5 to 20 mm, and the elongation rate in the width direction of the cover portion by this is 150 to 300%, particularly 180 to 260. It is preferably%.

When the inguinal cover portion is provided on the front exterior body 12F, the cover portion elastic expansion / contraction member can be provided in the same manner.

When elastic elastic members 15, 16 and 19 are provided in the front-rear direction range having the absorber 56 as in the lower waist portion U and the buttock cover portion 14 in the illustrated form, the width of the absorber 56 in a part or all of them. In order to prevent contraction in the direction, the middle in the width direction (preferably including the entire inner / outer fixing portion 201) including a part or all of the portion overlapping in the width direction with the absorber 56 is defined as the non-stretchable region A1, and the width thereof is defined as the non-stretchable region A1. Both sides in the direction are the expansion / contraction region A2. The waist portion W is preferably a stretchable region A2 over the entire width direction, but a non-stretchable region A1 may be provided in the middle in the width direction as in the lower waist portion U.

In the stretchable region A2 and the non-stretchable region A1, elastic stretchable members 15 to 17, 19 are formed between the inner sheet layer 12H and the outer sheet layer 12S in which the printed sheet 25 is fixed on the inner surface with hot melt adhesives H1 and H2. The elastic stretchable members 15, 16 and 19 are supplied and fixed at least at both ends in the stretchable direction in the stretchable region A2 via a hot melt adhesive, and are not fixed in the non-stretchable region A1 but as the non-stretchable region A1. The elastic stretchable members 15, 16 and 19 are cut by pressurization and heating at one place in the middle in the width direction, or almost the entire elastic stretchable members 15, 16 and 19 are finely cut by pressurization and heating. However, it can be constructed by killing the elasticity in the non-stretchable region A1 while leaving the elasticity in the stretchable region A2. In the former case, as shown in FIG. 4, the non-expandable region A1 is in a state where the elastic elastic members 15, 16 and 19 continuous from the elastic elastic regions A2 are not required and the elastic elastic members 18 are independently contracted to their natural lengths. Therefore, it remains between the outer sheet layer 12S and the inner sheet layer 12H, and in the latter case, although not shown, the cutting balance continuous from the elastic elastic members 15, 16 and 19 of the elastic region A2, and both elastic regions A2. A cut piece of the elastic elastic member that is not continuous with the elastic elastic members 15, 16 and 19 is unnecessary. The elastic elastic member remains contracted to its natural length by itself and remains between the outer sheet layer 12S and the inner sheet layer 12H.

<Example of tape-type disposable diapers>
9 to 15 show an example of a tape-type disposable diaper, in which reference numeral X indicates the entire width of the diaper excluding the fastening tape, and reference numeral L indicates the total length of the diaper. This tape-type disposable diaper includes an absorber 56 extending from the ventral side to the dorsal side, a liquid-permeable top sheet 30 covering the front side of the absorber 56, and a liquid-impermeable sheet 11 covering the back side of the absorber 56. The ventral end flap portion EF and the dorsal end flap portion EF, which are portions extending to the front side and the rear side of the absorber 56, respectively, and which do not have the absorber 56. It has a pair of side flap portions SF extending laterally from the side edge of the absorber 56. A constriction along the leg circumference is formed in the middle of the side flap portion SF in the front-rear direction, and fastening tape 13 is provided on the back side of the constricted portion.

In the illustrated embodiment, the back surface of the liquid impermeable sheet 11 is covered with an exterior sheet 12 made of a non-woven fabric or the like, but the exterior sheet 12 can be omitted. The exterior sheet 12 extends to the periphery of the diaper, the liquid-impermeable sheet 11 extends to the front and rear edges of the diaper in the front-rear direction, and the side edges of the absorber and the side edges of the exterior sheet in the width direction. The liquid-impermeable sheet 11 can be extended to the periphery of the diaper, if necessary, such as when the outer sheet 12 is not provided, although the sheet extends between the two. As the exterior sheet 12, the same non-woven fabric as that used for the exterior body of the pants-type disposable diaper can be used. Further, as the absorber, the top sheet, and the liquid-impermeable sheet 11, the same ones as in the case of the pants-type disposable diaper can be used.

The top sheet 30 and the liquid-impermeable sheet 11 are rectangular in the illustrated example, have slightly larger dimensions in the front-rear direction and the width direction than the absorbing element 50, and protrude from the side edge of the absorbing element 50 in the top sheet 30. The peripheral edge portion and the peripheral edge portion protruding from the side edge of the absorbing element 50 in the liquid impermeable sheet 11 are joined by a hot melt adhesive or the like.

Further, as in the case of the pants-type disposable diaper, the absorber 56 can be interposed between the top sheet and the liquid-impermeable sheet as an absorbent element wrapped by the packaging sheet, and is intermediate between the top sheet and the absorbent element. A sheet can be provided. The intermediate sheet 40 of the illustrated form is arranged in the center shorter than the width of the absorbing element 50, but may be provided over the entire width. The length of the intermediate sheet 40 in the longitudinal direction may be the same as the total length of the diaper, may be the same as the length of the absorbing element 50, or may be within a short length range centered on the region for receiving the liquid. Further, as in the case of the pants-type disposable diaper, a discoloring indicator 80 that comes into contact with the liquid content of the excrement can be provided.

Three-dimensional gathers 60, 60 that stand up on the skin side are provided on both sides of the surface of the tape-type disposable diaper in the width direction. The three-dimensional gathers 60, 60 mainly include gather sheets 62, 62 folded in the width direction to form a two-layer structure, and gather elastic elastic members for forming gathers, and the top sheet 30. A root portion joined by a hot melt adhesive or the like, an extending portion extending from the root portion to the center side in the width direction, and this extending portion in the range from the upper side of both sides to the inner surface of each side flap portion SF. It has an inverted portion 67 in which both ends in the front-rear direction are fixed to the top sheet 30, and a non-fixed free portion 68 located between these inverted portions 67, and at least the tip of the free portion 68. A gather elastic elastic member 63 is attached to the portion along the front-rear direction, and when the gather elastic elastic member 63 is attached, the free portion rises due to the contraction force of the gather elastic elastic member 63, and as a result of elastic adhesion around the leg, so-called from around the leg. Side leakage is prevented.

Further, in the illustrated figure, at the base portion of the three-dimensional gather 60 in each side flap portion SF, an elastic elastic member 69 around the leg made of rubber thread or the like is formed between the gather sheet 62 and the liquid impermeable sheet 11 in the front-rear direction. It is attached along the above, and the leg circumference portion of each side flap portion SF is configured to be a flat gather due to the contraction force. The elastic elastic member 69 around the legs can also be arranged between the liquid-impermeable sheet 11 and the exterior sheet 12 in the side flap portion SF. A plurality of elastic elastic member 69s around the legs may be provided on each side as shown in the illustrated example, or only one member may be provided on each side.

The fastening tape 13 in the illustrated embodiment includes a tape mounting portion 13C fixed to the side portion of the diaper, a sheet base material forming the tape main body portion 13B protruding from the tape mounting portion 13C, and a tape main body portion 13B in the sheet base material. It has a locking portion 13A with respect to the ventral side provided in the middle portion in the width direction of the above, and the tip side from the locking portion 13A is a grip portion. The tape attachment portion 13C of the fastening tape 13 is sandwiched between the gather sheet 62 forming the inner layer and the outer sheet 12 forming the outer layer in the side flap portion, and is adhered to both sheets 62 and 12 with a hot melt adhesive. .. Further, the locking portion 13A is bonded to the inner surface of the tape main body portion 13B with an adhesive.

As the locking portion 13A, a hook material (male material) of a mechanical fastener (hook-and-loop fastener) is suitable. The hook material has a large number of engaging protrusions on its outer surface side. The shapes of the engaging protrusions are (A) checkered, (B) J-shaped, (C) mushroom-shaped, (D) T-shaped, and (E) double J-shaped (J-shaped). There are shapes that are combined together), but any shape may be used. Of course, an adhesive layer can be provided as a locking portion of the fastening tape 13.

Further, as the sheet base material forming the tape mounting portion 13C to the tape main body portion 13B, a non-woven fabric, a plastic film, a polylami non-woven fabric, paper or a composite material thereof can be used.

When wearing the diaper, the fastening tape 13 is locked at an appropriate position on the outer surface of the ventral F in a state where the side flap portion SF on the dorsal side is overlapped with the outside of the side flap portion SF on the ventral side. The position and size of the locking portion of the fastening tape 13 can be arbitrarily determined.

It is preferable to provide a target sheet 24 having a target for facilitating locking at the locking portion of the fastening tape 13 on the ventral side F. When the locking portion 13A is a hook material, the target sheet 24 is a film type having a film layer and an engaging layer provided on the entire outer surface of the locking portion 13A to which the hook of the locking portion 13A is detachably engaged. Can be preferably used. In this case, the engaging layer is a net-like body knitted with threads having loops mounted on the film layer, and a non-woven fabric layer of thermoplastic resin is provided by intermittent ultrasonic sealing. It is known that the non-woven fabric fibers form a loop on the film layer, but any of them can be preferably used. It is also possible to use a filmless type target tape 20 which is made by embossing a non-woven fabric of a thermoplastic resin and has no film layer. In these target tapes 20, the fastening tape 13 is bonded by the hook of the fastening tape 13 being entangled or caught in the loop.

When the locking portion 13A is an adhesive layer, a sheet substrate made of a plastic film having a smooth surface, which is highly adhesive, can be peeled off.

Further, when the locking portion of the fastening tape 13 on the ventral side F is made of a non-woven fabric, for example, when the exterior sheet 12 of the illustrated form is made of a non-woven fabric and the locking portion of the fastening tape 13 is a hook material 13A. , The target sheet 24 can be omitted, and the hook material 13A can be entwined with the non-woven fabric of the exterior sheet 12 and locked. In this case, the target sheet 24 may be provided between the exterior sheet 12 and the liquid impermeable sheet 11.

<About decorative printing>
As shown in FIGS. 16 to 18, the liquid impermeable sheet 11 has a register mark region 111 having a width wider than the register mark 29 and covering the entire front-rear direction, and an inner decorative area 112 other than the register mark area 111. In the register mark area 111, only the register mark 29 is printed in one place in the front-rear direction, and the inner decorative area 112 is printed with the inner decorative print 28. As described above, by providing only the registration mark 29 in the registration mark region 111 of the liquid impermeable sheet 11 and providing the inner decorative printing 28 in the other regions, it is possible to surely avoid erroneous recognition of the registration mark 29.

And characteristically, as in the form shown in FIGS. 2, 4 and 5, the form shown in FIGS. 7 and 8, and the form shown in FIGS. 10 and 14, the absorber 56 of the liquid impermeable sheet 11 On the opposite side, outer members 24 and 25 having a portion overlapping the registration mark area 111 and having an outer decorative print 27 in the portion overlapping the registration mark area 111 are provided. That is, the decorative printing of the entire article is not formed only by the inner decorative printing 28 of the liquid-impermeable sheet 11, but the outer decorative printing 27 is applied to the portion of the outer members 24 and 25 that overlaps with the register mark area 111. When viewed from the outer surface, the outer decorative print 27 appears in the portion overlapping the dedicated area of the cash register mark 29, and the same decorative effect as when the inner decorative print 28 is provided in the cash register mark area 111 can be obtained. .. Therefore, when the liquid-impermeable sheet 11 has the registration mark 29 and the decorative prints 27 and 28, the decorative print range can be effectively expanded.

The shape of the registration mark 29 can be appropriately determined, but when the size is minimized, a rectangular shape as shown in the illustrated example, particularly a rectangular shape having a long side in the width direction (CD direction) is preferable, and the shape of the registration mark 29 is in the width direction. It is desirable that the length is 5 mm or more, particularly 15 mm or more, and the length in the front-rear direction is 5 mm or more. As long as this condition is satisfied (as long as it includes this minimum rectangular range), the shape may be a simple figure such as a circle or a polygon, and usually the length in the width direction is It is preferable that the length is about 10 to 25 mm and the length in the front-rear direction is about 5 to 20 mm. The width of the register mark area 111 can be appropriately determined, but in order to avoid erroneous recognition, it is preferable that the inner decorative print 28 and the register mark 29 are separated by 5 mm or more, preferably 10 mm or more. Further, the registration mark 29 may be printed on either the front side or the back side of the liquid impermeable sheet 11.

The number and arrangement of the register mark areas 111 are not particularly limited, but it is desirable that only one is provided in the middle portion in the width direction, in which case the outer members 24 and 25 and the outer decorative print 27 are the absorbent articles. It is desirable that at least one of the front side from the center in the front-rear direction and the rear side from the center in the front-rear direction includes a portion overlapping the registration mark area 111. When the register mark region 111 is located at both ends in the width direction of the liquid impermeable sheet 11, the printable range of the inner decorative print 28 is remarkably narrowed, and the outer decorative prints 27 of the outer members 24 and 25 supplement the printability. It becomes difficult. Further, if the registration mark region 111 is located at one end of the liquid impermeable sheet 11 in the width direction, it becomes difficult to balance the left and right in appearance.

As shown in the illustrated figure, the inner decorative print 28 may be provided in the region of the liquid impermeable sheet 11 that overlaps with the outer members 24 and 25, but the inner decorative print 28 is not provided (the outer members 24 and 25 and the outer members 24 and 25). When configured so that the inner decorative print 28 does not overlap), the inner decorative print 28 is partially hidden by the outer members 24 and 25 even if the outer members 24 and 25 use members having low visible light transmission. It is preferable because it does not deteriorate the appearance. Further, when the area that does not have the inner decorative print 28 is provided in this way, if the position is displaced, the inner decorative print 28 may overlap with the outer decorative print 27, but the liquid impermeable sheet 11 has the registration mark 29. Is provided, and positioning can be performed using the registration mark 29, so that misalignment of the area that does not have the inner decorative print 28 is unlikely to occur.

The types, shapes, and dimensions of the inner decorative print 28 and the outer decorative print 27 are not particularly limited. Decorative prints 27 and 28 include continuous decorative prints (FIG. 2) consisting of characters (size, brand name, maker name, pattern name, etc.) that are regularly repeated in the front-back direction and width direction, and a large number of structural units such as patterns. , In addition to the inner decorative printing 28 in FIGS. 7 and 10), intermittent decorative printing such as a product logo, a character picture, a photograph, etc., which is placed only on one or both of the front and back of the product (FIGS. 2 and 10). 7 and the outer decorative print 27 in FIG. 10), and either of the inner decorative print 28 and the outer decorative print 27 may be adopted. However, in the continuous decorative printing, even if the cutting positions of the front and rear ends are slightly deviated, there is almost no effect on the appearance, but the misalignment between the members having the continuous decorative printing is conspicuous, and the appearance is deteriorated. On the other hand, when intermittent decorative printing is performed during continuous decorative printing, the difference between the two is not noticeable. Therefore, when the member having the inner decorative print 28 and the member having the outer decorative print 27 are separated as shown in the illustrated form, it is desirable that the inner decorative print 28 is a continuous decoration and the outer decorative print 27 is an intermittent decoration. Further, the inner decorative print 28 may be printed on either the front side or the back side of the liquid-impermeable sheet 11, or may be printed on both the front and back sides. Similarly, the outer decorative print 27 may be printed on either the front side or the back side of the outer members 24 and 25, and may be printed on both the front and back sides.

When the indicator 80 that discolors in contact with the liquid content of the excrement is provided, it is desirable that the indicator 80 is provided on the side of the absorber 56 in the register mark region 111 of the liquid impermeable sheet 11. Further, in that case, it is desirable that the outer decorative print 27 is not provided in the area overlapping the indicator 80, and it is preferable that the outer decorative print 27 is separated by 5 mm or more, particularly 10 mm or more. The register mark area 111 may be subjected to the outer decorative print 27 over the entire area, or the outer decorative print 27 may be applied while avoiding the register mark 29, but the area does not have the inner decorative print 28. By using this as the installation area of the indicator 80 and not providing the outer decorative print 27 in the area overlapping the indicator 80, the check mark 29, the decorative prints 27 and 28, and the indicator 80 are made more efficient. Can be arranged as a target.

The outer members 24 and 25 having the outer decorative print 27 may be provided with a member having a shape substantially matching a part or the whole of the register mark area 111, but include a part or the whole of the register mark area 111 in the front-rear direction. And at least one of the width directions may be provided with a member covering a range larger than the registration mark region 111. Further, as described below, it goes without saying that existing members can be used in addition to providing dedicated members as the outer members 24 and 25. Further, the outer members 24 and 25 may overlap with the cash register mark 29. In that case, the outer decorative print 27 and the cash register mark 29 may overlap with each other, but the print position of the outer decorative print 27 and the outer decorative print 27 may overlap with each other so as not to overlap with each other. Adjusting the position of the register mark 29 is preferable because it is possible to prevent deterioration of the appearance of the outer decorative print 27 due to the appearance of the outer decorative print 27 overlapping with the register mark 29.

For example, in a pants-type disposable diaper, as described above, the exterior body 12 and the interior body 200 are the main components, and the interior body 200 generally contains the liquid-impermeable sheet 11. Further, since it is common to interpose the printing sheet 25 inside the exterior body 12 or between the interior body 200 and the exterior body 12, it is only one to perform the outer decorative printing 27 using the printing sheet 25. This is a preferred form. That is, as shown in FIGS. 2 to 5, and 7 and 8, the liquid impermeable sheet 11 of the interior body 200 is provided with the inner decorative print 28, and at least the front exterior body 12F and the rear exterior body 12B are provided. It is one preferable form that the printing sheet 25 having the outer decorative printing 27 is built in the non-stretchable region A1 on the one hand.

The base material of the printing sheet 25 is not particularly limited as long as it is suitable for printing, and for example, paper such as crepe paper, resin film, or the like can be used. When crepe paper is used, its thickness is preferably 100 to 150 μm, and its density is preferably 100 to 200 kg / m ³ . A crepe paper having such a thickness and density ^{can be produced by setting a basis weight of 10 g / m 2} or more and a crepe ratio of about 10%. The density can be calculated from the basis weight and the thickness. The crepe ratio is a value calculated by ((peripheral speed of Yankee dryer) − (peripheral speed of take-up reel)) / (peripheral speed of Yankee dryer) × 100 (%). When the print sheet 25 is close to the outer surface of the product, it can be easily seen through from the outside of the product. Therefore, as shown in the figure, the print sheet 25 is adjacent to the inner surface of the outer sheet layer 12S among the outer sheet layer 12S and the inner sheet layer 12H. Although it is desirable that the inner sheet layer 12H is provided, it may be provided adjacent to the outer surface of the inner sheet layer 12H, or may be provided between the outer body 12 and the inner body.

Further, in the tape type disposable diaper, since the target sheet 24 is located outside the liquid permeable sheet 11 and is suitable for printing, it is one of the ways to perform the outer decorative printing 27 by using the target sheet 24. This is a preferred form. When the target sheet 24 includes a film layer, the outer decorative printing 27 can be applied to the film layer, and when the target sheet 24 is a filmless type that does not include the film layer, the non-woven fabric which is the engaging layer can be subjected to the outer decorative printing 27.

FIG. 19 schematically shows a step of feeding out the liquid-impermeable sheet 11 having the registration mark 29 from the original roll and detecting the registration mark 29 by an optical detection device such as a phototube prior to bonding with other members. It is shown in. That is, on the original roll 11R of the continuous band-shaped liquid-impermeable sheet 11 in which the unit portion to be incorporated in each article is repeatedly continuous, the register mark 29 (with the inner decorative print 28) is previously applied to each unit portion 11U. The register mark) is printed. The liquid-impermeable sheet 11 shown in FIG. 19 has an inner decorative print 28 and a cash register mark 29 in the form shown in FIG. The liquid-impermeable sheet 11 unwound from the original roll 11R is alone in the appropriate place until the liquid-impermeable sheet 11 is cut at the product assembly line, especially before being bonded to other members. In this state, the registration mark 29 is detected by an optical detection device PD such as a phototube, and based on the detection result (for example, according to the deviation of the registration mark 29 position with respect to the cutting position), the liquid impermeable sheet 11 is drawn. Control (tension control). By such transport control, it is possible to prevent the decorative prints 27 and 28 from being misaligned due to a change in the elongation rate of the liquid impermeable sheet 11. In this embodiment, the liquid-impermeable sheet 11 is coated with the indicator 80, assembled into the interior body 200 together with the top sheet 30 and the absorber 56, and then attached to the exterior body 12 having the print sheet 25 manufactured separately. As a result, the outer decorative printing 27 of the printing sheet 25 and the inner decorative printing 28 of the liquid-impermeable sheet 11 are combined.

<Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.

-The "front-back (vertical) direction" means the direction connecting the ventral side (front side) and the dorsal side (rear side), and the "width direction" means the direction orthogonal to the front-back direction (horizontal direction).
-The "front side" means the one closer to the wearer's skin when wearing the absorbent article, and the "back side" means the one farther from the wearer's skin when wearing the absorbent article.
-The "front side" means the surface of the member that is closer to the wearer's skin when wearing the absorbent article, and the "back surface" is the side that is far from the wearer's skin when the absorbent article is worn. Means the face of.

-"Elongation rate" means a value when the natural length is 100%.

-"Gel strength" is measured as follows. Artificial urine (urea: 2 wt%, sodium chloride: 0.8 wt%, calcium chloride dihydrate: 0.03 wt%, magnesium sulfate heptahydrate: 0.08 wt%, and ion-exchanged water: 97.09 wt% To 49.0 g of the mixture), 1.0 g of a highly absorbent polymer is added, and the mixture is stirred with a stirrer. The produced gel is left in a constant temperature and humidity chamber at 40 ° C. × 60% RH for 3 hours, then returned to room temperature, and the gel strength is measured with a card meter (Curdmeter-MAX ME-500 manufactured by I. techno Engineering).

・ "Metsuke" is measured as follows. After the sample or test piece is pre-dried, it is left in a test room or device in a standard state (the test place is a temperature of 20 ± 5 ° C. and a relative humidity of 65% or less) to bring it into a constant weight state. Pre-drying refers to making a sample or test piece constant in an environment where the relative humidity is 10 to 25% and the temperature does not exceed 50 ° C. It is not necessary to pre-dry the fibers having an official moisture content of 0.0%. A sample having a size of 200 mm × 250 mm (± 2 mm) is cut out from the test piece in a constant weight state using a paper density plate (200 mm × 250 mm, ± 2 mm). Weigh the sample, calculate the weight per square meter, and use it as a basis weight.

-"Thickness" is automatically measured using an automatic thickness measuring device (KES-G5 handy compression measurement program) under the conditions of load: 0.098 N / cm ² and pressurized area: 2 cm ^2.

-The amount of water absorption is measured by JIS K7223-1996 "Method for testing the amount of water absorption of a highly water-absorbent resin".

-The water absorption rate shall be the "time to the end point" when JIS K7224-1996 "Water absorption rate test method for highly water-absorbent resin" was performed using 2 g of highly absorbent polymer and 50 g of physiological saline. ..

-If there is no description about the environmental conditions in the test or measurement, the test or measurement shall be performed in a test room or equipment under standard conditions (test location: temperature 20 ± 5 ° C, relative humidity 65% or less). ..

Although the above example is an application example to a pants-type disposable diaper, the present invention can be used for all absorbent articles such as a tape-type disposable diaper, a pad-type disposable diaper, and a sanitary napkin.

A1 ... Non-stretchable area, A2 ... Stretchable area, L ... Intermediate area, LO ... Leg opening, T ... Waist circumference area, U ... Waist lower part, W ... Waist part, WO ... Waist opening, 11 ... Liquid impermeable Seat, 12 ... exterior body, 12A ... side seal part, 12B ... rear side exterior body, 12F ... front side exterior body, 12H ... inner seat layer, 12S ... outer seat layer, 12r ... waist side folded part, 14 ... buttock cover part , 18 ... Unnecessary elastic elastic member, 20 ... Crotch side folded part, 200 ... Interior body, 201 ... Inner / outer fixing part, 22 ... Cutting trace, 24, 25 ... Outer member, 24 ... Target sheet, 25 ... Printing sheet, 27, 28 ... decorative printing, 27 ... outer decorative printing, 28 ... inner decorative printing, 29 ... registration mark, 30 ... top sheet, 40 ... intermediate sheet, 50 ... absorbent element, 56 ... absorber, 58 ... packaging sheet, 60 ... three-dimensional Gather, 62 ... Gather sheet, 80 ... Indicator, 111 ... Registration mark area, 112 ... Inner decoration area.

Claims (4)

It has an absorber, a liquid-permeable top sheet that covers the front side of the absorber, a liquid-impermeable sheet that covers the back side of the absorber, and a cash register mark and an inner decorative print printed on the liquid-impermeable sheet. , In absorbent articles
The liquid impermeable sheet has only one register mark area in the middle portion in the width direction, which has the register mark and does not have the inner decorative print.
The register mark region has a width wider than that of the register mark and is provided over the entire front-rear direction of the liquid-impermeable sheet.
The region other than the registration mark region in the liquid-impermeable sheet is an inner decorative region having the inner decorative print, and the inner decorative print is composed of a large number of structural units that regularly repeat in the front-rear direction and the width direction. Continuous decorative printing,
An outer member having a portion overlapping the registration mark region is provided on the side of the liquid permeable sheet opposite to the absorber.
The outer member has an outer decorative print in a portion overlapping the cash register mark area, and the outer decorative print is an intermittent decorative print arranged only on one or both of the front and rear of the product.
The outer member and the outer decorative print are arranged on at least one of the front side and the rear side of the absorbent article in the front-rear direction.
The outer decorative print and the cash register mark do not overlap,
The liquid-impermeable sheet has a first region located on the waist side of the outer member, a second region overlapping the outer member, and a third region located on the crotch side of the outer member. The first area and the third area each have the inner decorative print, and the second area does not have the inner decorative print.
An absorbent article, characterized in that. A discoloring indicator that comes into contact with the liquid content of excrement is provided on the side of the absorber in the register mark region of the liquid impermeable sheet.
The cash register mark is located on the waist side of the outer decorative print.
By locating the indicator on the crotch side of the outer decorative print, the outer decorative print is not provided in the area overlapping the indicator.
The absorbent article according to claim 1. It is provided with an exterior body that individually or individually constitutes the front body and the rear body, and an interior body that is attached to the exterior body.
The interior body includes an absorber, a liquid-permeable top sheet that covers the front side of the absorber, a liquid-impermeable sheet that covers the back side of the absorber, and a cash register mark and an inside printed on the liquid-impermeable sheet. With decorative printing,
It has side seals, which are the parts where both sides of the exterior body on the front body and both sides of the exterior body on the back body are joined.
A pants-type disposable diaper having an annular waist circumference, a waist opening, and a pair of left and right leg openings.
The outer member is a printing sheet having the outer decorative printing, which is interposed inside the outer body or between the inner body and the outer body.
The absorbent article according to claim 1 or 2. It has an absorber, a liquid-permeable top sheet that covers the front side of the absorber, a liquid-impermeable sheet that covers the back side of the absorber, and a cash register mark and an inner decorative print printed on the liquid-impermeable sheet. And
Fastening tapes on both sides of the dorsal side,
A target tape provided on the ventral outer surface to which the fastening tape is detachably fixed, and
It is a tape type disposable diaper equipped with
The outer member is the target tape.
The absorbent article according to claim 1 or 2.

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