JP2017205193A5 - - Google Patents

Description

Absorbent articles

  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 to provide decorative prints such as characters and patterns on liquid impermeable sheets so as to be visible from the outer surface of the product (Patent Document 1 [Patent Document 1 [ 0006] [0007]).

  And when manufacturing an absorptive article using a liquid impermeable sheet which has such decorative printing, conveyance control of a liquid impermeable sheet is performed so that a position of decorative printing may not shift. That is, on the raw fabric roll of a continuous belt-like liquid-impervious sheet in which unit parts to be contained in individual articles are repeated continuously, registration marks (register marks) are printed together with decorative printing on each unit part. After drawing out the liquid impervious sheet from this original fabric roll, registration mark by an optical detection device such as a photoelectric tube at a suitable place until the liquid impermeable sheet is cut in an assembly line of the product Is detected, and draw control (tension control) of the liquid impermeable sheet is performed based on the detection result (for example, according to the shift of the registration mark position with respect to the cutting position). By such conveyance control, it is possible to prevent the positional shift of the decorative print accompanying the change of the elongation rate of the liquid impermeable sheet.

  However, in position detection using registration marks, in order to avoid false detection, the MD direction (conveyance in the CD direction of the registration marks (lateral direction perpendicular to the conveyance direction. Width direction of most products). Orientation, fore and aft directions in most products, not freely printed at all, or limited in shape, pattern or color, so that the freely embellishable area in the liquid-impervious sheet There was a limit.

JP 2005-315651 A

  Then, the main subject of this invention is in expanding the decoration printing range in, when it has registration mark printing and decoration printing in a liquid impermeable sheet.

The typical aspect of this invention which solved the said subject is as follows.
<First aspect>
An absorbent body, a liquid-permeable top sheet covering the front side of the absorbent body, a liquid impermeable sheet covering the back side of the absorbent body, and a registration mark and an inner decorative print printed on the liquid impermeable sheet , In absorbent articles,
The liquid impermeable sheet has the registration mark in a registration mark area which is wider than the registration mark and extends in the front-rear direction, and does not have the inner decorative print.
It has an outer member having a portion overlapping the registration mark area on the opposite side of the liquid impermeable sheet to the absorber;
An outer decorative print is provided on a portion of the outer member overlapping the registration mark area.
An absorbent article characterized in that.

(Action effect)
In order to avoid misrecognition of the registration mark in the liquid impermeable sheet, it is better than not to apply the inner decorative printing on the registration mark area in the liquid impermeable sheet at all. Therefore, in the present invention, the basic idea is changed without changing the basics, and the decorative printing of the whole article is not configured by only the inner decorative printing of the liquid impermeable sheet, but in the outer member of the liquid impermeable sheet The outer decorative print appears on the portion overlapping with the registration mark area as viewed from the outer surface by applying the outer decorative print to the portion overlapping the registration mark area, as in the case where the inner decorative print is provided in the registration mark area The decorative effect of is obtained. Therefore, according to the present invention, it is possible to expand the decorative printing range in the case where the liquid impermeable sheet has the registration mark printing and the decorative printing.

<Second aspect>
In the region of the liquid impermeable sheet overlapping the outer member, the inner decorative print is not provided.
The absorbent article of the first aspect.

(Action effect)
In this manner, when the outer member having the outer decorative print and the inner decorative print do not overlap with each other, the inner decorative print is partially formed on the outer member even if a member having low visible light transmittance is used for the outer member. It is preferable because it does not hide and deteriorate the appearance. In the case of providing the area not having the inner decorative print as described above, the inner decorative print may overlap the outer member if the position is shifted, but the liquid impermeable sheet is provided with a registration mark, Since positioning can be performed using this registration mark, positional deviation of the area not having the inner decorative print is less likely to occur.

<Third aspect>
The inner decorative print is a continuous decorative print consisting of a large number of constituent units regularly repeating in the front and rear direction and the width direction, and the outer decorative print is an intermittent decorative print arranged only at one or both of the front and back of the product. Is
The absorbent article of the first or second aspect.

(Action effect)
For decorative printing on absorbent articles, in addition to continuous decorative printing consisting of a large number of structural units such as letters and patterns regularly repeated in the front and back direction and width direction, the front and back of the product such as product logos and character pictures There is intermittent decoration printing which is arranged only in one or both. In the continuous decorative printing, even if the cutting position at the front and rear ends is slightly deviated, the appearance is hardly affected, but the positional deviation between members having the continuous decorative printing is noticeable and the appearance is deteriorated. On the other hand, in the case of having intermittent decoration printing during continuous decoration printing, the deviation between the two is inconspicuous. 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 be continuous decorative printing and the outer decorative print be intermittent decorative printing as described above.

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

(Action effect)
When the registration mark area is positioned at both ends in the width direction of the liquid impermeable sheet, the printable range of the inner decorative print becomes remarkably narrow, and it becomes difficult to compensate for the outer decorative print of the outer member. In addition, when the registration mark area is positioned at any one end in the width direction of the liquid impermeable sheet, it is difficult to balance the left and right in the appearance. Therefore, it is desirable to arrange as described above.

<Fifth aspect>
The absorber side of the registration mark area of the liquid impermeable sheet has an indicator that changes color in contact with the liquid portion of the excrement,
Do not have the outer decorative print in the area overlapping the indicator
The absorbent article according to any one of the first to fourth aspects.

(Action effect)
Although the registration mark area may be subjected to the outer decoration printing over the entire area or may be subjected to the outer decoration printing avoiding the registration mark, it is an area not having the inner decoration printing, so this is used as an indicator setting area By providing the outer decorative print in the area overlapping with the indicator, the registration mark, the decorative print, and the indicator can be efficiently arranged. (In general, the indicator is provided over a wide range in the longitudinal direction of the absorbent article.)

<Sixth aspect>
An exterior body that constitutes the front and back bodies individually or individually, and an interior body attached to the exterior body,
The inner body includes an absorbent body, a liquid-permeable top sheet covering the front side of the absorbent body, a liquid-impermeable sheet covering the back side of the absorbent body, and a registration mark and an inner side printed on the liquid impermeable sheet With decorative printing,
It has a side seal part which is a part where the both sides of the exterior body in the front body and the both sides of the exterior body in the back body are respectively joined,
A pants-type disposable diaper having an annular waist and a waist opening and a pair of left and right leg openings,
The outer member is a printing sheet having the outer decorative print, which is interposed inside the outer package or between the inner package and the outer package.
The absorbent article according to any one of the first to fifth aspects.

(Action effect)
As described above, pants-type disposable diapers are mainly composed of an exterior body and an interior body, and those having a liquid impermeable sheet incorporated in the interior body are generally used. Moreover, since it is common to interpose a printing sheet in the inside of an exterior body, or an interior body and an exterior body, it is one preferable form to perform outer side decoration printing using this printing sheet.

<Seventh aspect>
An absorbent body, a liquid-permeable top sheet covering the front side of the absorbent body, a liquid impermeable sheet covering the back side of the absorbent body, and a registration mark and an inner decorative print printed on the liquid impermeable sheet And
Fastening tape provided on both sides of the back,
A target tape provided on the ventral outer surface, to which the fastening tape is detachably fixed;
A tape-type disposable diaper provided with
The outer member is the target tape.
The absorbent article according to any one of the first to fifth aspects.

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

  As described above, according to the present invention, advantages such as being able to expand the decorative printing range in the case where the liquid impermeable sheet has registration mark printing and decoration printing can be provided.

It is an unfolded state top view which shows the inner surface of a pants type disposable diaper. It is an unfolded state top view which shows the outer surface of a pants type disposable diaper. It is 2-2 sectional drawing of FIG. It is the 3-3 sectional drawing of FIG. (A) It is 4-4 sectional drawing of FIG. 1, and (b) 5-5 sectional drawing of FIG. It is a perspective view of a pants type disposable diaper. It is an unfolded state top view which shows the outer surface of a pants type disposable diaper. (A) It is 4-4 sectional drawing of FIG. 7, and (b) 5-5 sectional drawing of FIG. It is an unfolded state top view which shows the inner surface of a tape type disposable diaper. It is an unfolded state top view which shows the outer surface of a tape type disposable diaper. It is 6-6 sectional drawing of FIG. It is 7-7 sectional drawing of FIG. It is 8-8 sectional drawing of FIG. It is 9-9 sectional drawing of FIG. It is 10-10 sectional drawing of FIG. It is a top view of the liquid impervious sheet in a pants type disposable diaper. It is a top view of the liquid impervious sheet in a pants type disposable diaper. It is a top view of the liquid impervious sheet in a tape type disposable diaper. It is a perspective view which shows the registration mark detection point of a liquid impermeable sheet.

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

<Example of pants type disposable diaper>
1 to 6 show a pants-type disposable diaper 100. FIG. The pants-type disposable diaper 100 extends from the front exterior body 12F to the back exterior body 12B from the front exterior body 12F through the crotch portion, and the front exterior body 12F constituting the front body F and the rear exterior body 12B constituting the rear body B. As described above, the inner body 200 provided inside the outer body 12F, 12B is provided, and the side seal portion 12A is formed by joining the both sides of the front outer body 12F and both sides of the rear outer body 12B. Thus, the opening formed by the front and rear ends of the exterior body 12F, 12B becomes a waist opening WO through which the wearer's trunk passes, and the lower edge of the exterior body 12F, 12B and the interior body 200 at both sides in the width direction of the interior body 200. The portions respectively enclosed by the side edges of the legs become the leg openings LO through which the legs pass. The interior body 200 is a portion that absorbs and holds excrement such as urine, and the exterior bodies 12F and 12B are portions for supporting the interior body 200 with respect to the body of the wearer. The symbol 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 part F to the edge of the waist opening WO of the back part B), and the symbol X indicates the diaper in the unfolded state Indicates the full width of the

  Further, the pants-type disposable diaper 100 of the present embodiment forms the waistline region T defined as the longitudinal direction range (the longitudinal direction range from the waist opening WO to the upper end of the leg opening LO) having the side seal portion 12A and the leg opening LO. And a middle region L defined as a front-rear direction range of the portion to be formed (between the front-rear direction region having the side seal portion 12A of the front body F and the front-rear direction region having the side seal portion 12A of the rear body B). The waistline region T can be divided into a “waist” W that conceptually forms an edge of the waist opening and a “waist lower part” U that is a lower part of the waist. Generally, when there is a boundary (for example, the thickness and the extension rate of the elastic elastic member change) in the waist area T in the waist direction area T, the waist opening WO side is closer to the waist than the boundary near the waist opening WO If there is no such boundary, the waist opening WO side becomes the waist portion W side than the absorber 56 or the interior body 200. The length in the front-rear direction varies depending on the size of the product, and can be determined as appropriate. For example, the waist W can be 15 to 40 mm, and the waist lower U can be 65 to 120 mm. On the other hand, both side edges of the intermediate region L are U-shaped or curvilinearly bundled along the circumference of the adherend's leg, and this is a site for inserting the wearer's leg. As a result, the pants-type disposable diaper in the unfolded state has a generally hourglass shape as a whole.

(Interior body)
The inner body 200 can have any shape, but is rectangular in the illustrated form. As shown in FIGS. 3 to 5, the inner body 200 is provided with the top sheet 30 on the body side, the liquid impermeable sheet 11, and the absorbent element 50 interposed therebetween. Yes, it is the main part that carries the absorption function. The code | symbol 40 has shown the intermediate sheet (second sheet) provided between the top sheet 30 and the absorption element 50, in order to make the liquid which permeate | transmitted the top sheet 30 transfer to the absorption element 50 rapidly, and 60 These show the solid gathers 60 which stood on the body side provided in the both sides of the interior body 200, in order to prevent that the excretion leaks to the both sides of the interior body 200. As shown in FIG.

  Fixing of the interior body 200 to the exterior bodies 12F, 12B can be performed by a bonding method such as heat sealing, ultrasonic sealing, or the like by material welding, or a hot melt adhesive. In the illustrated embodiment, it is fixed to the inner surface of the outer package 12F, 12B by the hot melt adhesive applied to the back surface of the inner body 200, that is, the back surface of the liquid impermeable sheet 11 and the mounting portion 65 of the solid gather 60 in this case. It is done. The inner and outer fixing portions 201 for fixing the inner body 200 and the outer bodies 12F and 12B can be provided substantially in the entire overlapping region, and usually provided in portions excluding both widthwise end portions of the inner body. preferable.

(Top sheet)
The top sheet 30 has a property of transmitting a liquid, and can be exemplified by a non-porous or non-porous non-woven fabric, a porous plastic sheet, and the like. Moreover, among these non-woven fabrics, the raw material fibers are not particularly limited. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, regenerated fibers such as rayon and cupra, natural fibers such as cotton, etc., mixed fibers of which two or more are used, composite fibers Etc. can be illustrated. Furthermore, the non-woven fabric may be produced by any processing. Examples of the processing method include known methods such as spun lace method, spun bond method, thermal bond method, melt blown method, needle punch method, air through method, point bond method and the like. For example, if flexibility and drape are required, the spun bond method and spun lace method require bulkiness and softness, and the air through method, point bond method and thermal bond method are preferable processing methods. .

  The top sheet 30 may be formed of one sheet or may be formed of a laminated sheet obtained by laminating two or more sheets. Similarly, the top sheet 30 may be a single sheet or two or more sheets in the plane direction.

  When the solid gathers 60 are provided, both sides of the top sheet 30 pass between the liquid impermeable sheet 11 and the solid gathers 60 and turn around to the back side of the absorbent element 50 to prevent liquid penetration. It is preferable to bond to the permeable sheet 11 and the solid gather 60.

  It is desirable that the top sheet 30 be fixed to a member adjacent to the back side by heat sealing, bonding means by material welding such as ultrasonic sealing, or hot melt adhesive for the purpose of preventing positional deviation with respect to the back side member. . In the illustrated embodiment, 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.

(Intermediate sheet)
In order to rapidly transfer the liquid that has permeated the top sheet 30 to the absorber, an intermediate sheet (also referred to as a “second sheet”) 40 can be provided, which has a higher liquid permeation rate than the top sheet 30. This intermediate sheet 40 not only allows the liquid to be rapidly transferred to the absorber to enhance the absorption performance by the absorber, but also prevents the phenomenon of "reversion" from the absorber of the absorbed liquid, and always dries on the top sheet 30 It can be in a state of The intermediate sheet 40 can be omitted.

As the intermediate sheet 40, materials similar to the top sheet 30, spun lace, spun bond, SMS, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bond or crepe paper can be exemplified. In particular, an air through non-woven fabric is preferable because it is bulky. It is preferable to use a core-sheath composite fiber as the air-through nonwoven 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 non-woven material fiber is preferably 2.0 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use eccentric fibers having no core in the center, hollow fibers, eccentric and hollow fibers as mixed fibers of all or part of the raw material fibers.

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

  The intermediate sheet 40 is preferably fixed to a member adjacent to the rear side by heat sealing, bonding means such as ultrasonic sealing, or by hot melt adhesive for the purpose of preventing positional deviation with respect to the rear side member. . In the illustrated embodiment, 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 a hot melt adhesive applied to the back surface.

(Liquid impervious sheet)
The material of the liquid impermeable sheet 11 is not particularly limited. For example, a plastic film made of an olefin resin such as polyethylene or polypropylene, a laminated non-woven fabric having a plastic film on the surface of a non-woven fabric, or a plastic film A laminated sheet etc. which overlapped and joined a nonwoven fabric etc. can be illustrated. For the liquid impermeable sheet 11, it is preferable to use a material having liquid impermeability and moisture permeability, which is preferably used from the viewpoint of preventing migration. As a plastic film having moisture permeability, 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 in a uniaxial or biaxial direction Is widely used. In addition, non-woven fabric using microdenier fibers, reinforcement of leakproofness by reducing the voids of the fibers by applying heat and pressure, and methods of coating highly water-absorbent resin or hydrophobic resin or water repellent agent Thus, a sheet which is made liquid impermeable without using a plastic film can also be used as the liquid impermeable sheet 11.

  The liquid impervious sheet 11 has a width that fits on the back side of the absorbent element 50 as shown, and the side of the top sheet 30 of the absorbent element 50 is wound around both sides of the absorbent element 50 in order to enhance leakproofness. It can also be extended to both sides. The width of the extension portion is preferably about 5 to 20 mm on each side.

  In addition, on the inner side of the liquid impermeable sheet 11, in particular, on the side surface of the absorber 56, it is possible to provide an excretion indicator whose color changes due to absorption of the liquid content.

(3D gather)
The three-dimensional gather 60 is a strip-shaped member extending along the both sides of the inner body 200 in the front-rear direction, and blocks waste horizontally moving along the top sheet 30 to prevent side leakage. Provided in the The three-dimensional gather 60 of the present embodiment is provided to stand up from the side portion of the inner body 200, and the portion on the root side stands obliquely toward the central side in the width direction, and the portion on the tip side from the middle portion has a width It stands diagonally outward in the direction.

  More specifically, the three-dimensional gather 60 folds a band-shaped gather sheet 62 having a length equal to the longitudinal length of the inner body 200 in the width direction and folds it into two, and A plurality of elongated gather elastic elastic members 63 are fixed in a stretched state along the longitudinal direction at intervals in the width direction. The base end of the solid gather 60 opposite to the tip (the end opposite to the sheet-folded portion in the width direction) is a mounting portion 65 fixed to the back of the side edge of the interior body 200, The portion other than the mounting portion 65 is a projecting portion 66 (portion on the folded portion side) protruding from the mounting portion 65. Further, the protruding portion 66 is composed of a root side portion toward the center in the width direction and a tip side portion folded back outward in the width direction from the tip of the root side portion. This form is a surface contact type solid gatherer, but a line contact type solid gatherer (not shown) which is not folded back in the width direction can also be adopted. And while it is considered as the falling part 67 fixed with respect to the side surface of the top sheet 30 in the front-back direction both ends of the protrusion parts 66 in the falling state, the front-back direction intermediate part located between these is not fixed A gather elastic elastic member 63 extending in the front-rear direction is fixed to the free portion 68 in an extended state.

  In the free portion 68 of the solid gather 60, hot melt adhesive and heat seal or super heat by various application methods are used to bond the inner layer and outer layer of the gather sheet 62 and to fix the gather elastic elastic member 63 sandwiched therebetween. At least one of fixing means by material welding such as a sonic seal can be used. When the entire inner layer and outer layer of the gather sheet 62 are bonded together, the flexibility is impaired. Therefore, it is preferable that portions of the gather elastic stretchable member 63 other than the bonding portion be not bonded or be weakly bonded. In the illustrated embodiment, a hot melt adhesive is applied only to the outer peripheral surface of the gather elastic stretchable member 63 by an application means such as a comb gun or a sure wrap nozzle, and sandwiched between the inner layer and the outer layer of the gather sheet 62. A structure for fixing the elongated elastic stretchable members to the inner layer and the outer layer of the gather sheet 62 and fixing the inner layer and the outer layer of the gather sheet 62 only with the hot melt adhesive applied to the outer peripheral surface of the member 63 It has become.

  In addition, for fixing the waterproof film 64 and the gather sheet 62 incorporated in the solid gather 60, and fixing the falling portion 67 to the side surface of the inner body 200, hot melt adhesive by various coating methods, heat sealing, At least one of means by material welding such as ultrasonic sealing can be used. In the illustrated embodiment, slot application of a hot melt adhesive is used to fix the waterproof film 64. In addition, although the hot melt adhesive and the means by material welding are combined to fix the falling portion 67 in the illustrated embodiment, these can be fixed by only one of the means.

Spunbonded nonwoven fabric (SS, SSS, etc.) as the gather sheet 62 and SMS nonwoven fabrics (SMS, SSMMS, etc.), a flexible, uniformity, opacity to excellent non-woven fabric such as a melt-blown nonwoven fabric, optionally water-repellent by a silicone The treated one can be suitably used, and the fiber basis weight is preferably about 10 to 30 g / m ² . A rubber thread or the like can be used as the elongated elastic stretchable member 63. When spandex thread rubber is used, the thickness is preferably 470 to 1240 dtex, and more preferably 620 to 940 dtex. 150 to 350% is preferable and 200 to 300% of the elongation rate at the time of fixation is more preferable. The term "extension rate" means a value when the natural length is 100%. Also, as shown, a waterproof film 64 can be interposed between the two-folded gather sheet.

  The number of the elongated elastic stretchable members 63 provided in the free portion of the solid gather 60 is preferably 2 to 6, and more preferably 3 to 5. The arrangement interval 60d is suitably 3 to 10 mm. With this configuration, the skin can be easily hit in the area where the elongated elastic stretchable member 63 is disposed. The elongated elastic stretchable member 63 may be disposed not only on the distal end side but also on the root side.

  The fixing target of 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 absorbent element 50 in the interior body 200.

  In the three-dimensional gather 60 thus configured, although the contraction force of the elongated elastic elastic member 63 acts to bring the both ends in the back and forth direction closer, the both ends of the projecting portion 66 are fixed so as not to stand up. On the other hand, since the space between them is a non-fixed free part, only the free part stands up 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 solid gathers 60 stand upright so as to open outward in the width direction in the crotch and its vicinity, so the solid gathers 60 contact the surface around the legs. It comes to improve fit.

  The dimensions of the solid gather 60 can be determined as appropriate, but in the case of an infant paper diaper, for example, as shown in FIG. 3, the standing height of the solid gather 60 (length in the width direction of the projecting portion 66 in the unfolded state) W6 is It is preferably 15 to 60 mm, in particular 20 to 40 mm. Further, it is preferable that the separation distance W3 between the folds positioned at the innermost position in the flat folded state so as to make the solid gather 60 parallel to the surface of the top sheet 30 is 60 to 190 mm, particularly 70 to 140 mm.

  It should be noted that, unlike the illustrated embodiment, solid gathers can be provided double (two rows) on each of the left and right sides of the interior body 200.

(Absorbent element)
The absorbent element 50 has an absorbent body 56 and a packaging sheet 58 which wraps the whole of the absorbent body 56. The packaging sheet 58 can also be omitted.

(Absorber)
The absorber 56 can be formed by an assembly of fibers. As this fiber assembly, a filament assembly obtained by opening as needed a fiber (a fiber bundle) of synthetic fibers such as cellulose acetate in addition to those obtained by stacking short fibers such as cotton-like pulp and synthetic fibers Can also be used. The fiber weight may be, for example, about 100 to 300 g / m ² in the case of stacking cotton-like pulp or short fibers, and in the case of filament aggregate, for example, about 30 to 120 g / m ^2. Can. The fineness in the case of a synthetic fiber 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 assembly, the filaments may be non-crimped fibers, but are preferably crimped fibers. The degree of crimp of crimped fibers can be, for example, about 5 to 75, preferably 10 to 50, and more preferably 15 to 50 per 2.54 cm . In addition, crimped fibers which are uniformly crimped are often used. It is preferable that the superabsorbent polymer particles be dispersed and held in the absorbent body 56.

  The absorber 56 may have a rectangular shape, but as also shown in FIGS. 1 and 2, the front end, the rear end and a narrow portion located between them and narrower than the front end and the rear end It is preferable to have an hourglass shape having the following because the absorber 56 itself and the three-dimensional gather 60 improve fit around the legs.

  Further, the dimensions of the absorber 56 can be appropriately determined as long as it extends to the front and rear, left and right of the urination port position, but it is preferable to extend to the peripheral portion of the inner body or its vicinity in the front and rear direction and width direction. Reference numeral 56X indicates the width of the absorber 56.

  (Superabsorbent polymer particles)

  The absorbent body 56 may contain superabsorbent polymer particles in part or all thereof. The superabsorbent polymer particles include "powder" in addition to "particles". As the super-absorbent polymer particles 54, those used in this type of disposable diaper can be used as they are, for example, sieved by sieving (shake for 5 minutes) using a standard sieve of 500 μm (JIS Z8801-1: 2006) The proportion of particles remaining on the top is preferably 30% by weight or less, and the proportion of particles remaining on the sieve by sieving (shake for 5 minutes) using a standard sieve of 180 μm (JIS Z8801-1: 2006) is 60 weight% or more is desirable.

  The material of the superabsorbent polymer particles can be used without particular limitation, but those having a water absorption of 40 g / g or more are preferable. Examples of the superabsorbent polymer particles include starch-based, cellulose-based and synthetic polymer-based particles, such as starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, and crosslinked sodium carboxymethyl cellulose. A thing, an acrylic acid (salt) polymer, etc. can be used. The shape of the superabsorbent polymer particles is preferably in the form of commonly used powdery particles, but other shapes may also be used.

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

  Further, as the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are suitably used. Thereby, even in the case of the bulky absorber 56, it is possible to effectively suppress the sticky feeling after liquid absorption.

The basis weight of the superabsorbent polymer particles can be appropriately determined in accordance with the absorption required for the application of the absorber 56. Therefore, although it can not generally say, it can be 50-350 g / m < ² >. If the basis weight of the polymer is less than 50 g / m ² , it will be difficult to secure the absorption amount. When it exceeds 350 g / m ² , the effect is saturated.

  If necessary, the superabsorbent polymer particles can adjust the spray density or the spray amount in the planar direction of the absorber 56. For example, it is possible to increase the spray amount of the excretory site of the fluid from other sites. When considering gender differences, males can increase the spray density (amount) on the front side, and females can increase the spray density (amount) in the center. In addition, it is possible to provide a portion where no polymer exists locally (for example, in the form of a spot) in the planar direction of the absorber 56.

  (Packaging sheet)

When the packaging sheet 58 is used, tissue paper, in particular, crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet with small holes, or the like can be used as the material. However, it is desirable that it is a sheet from which the superabsorbent polymer particles can not escape. When non-woven fabric is used instead of crepe paper, hydrophilic SMS non-woven fabric (SMS, SSMMS, etc.) is particularly preferable, and polypropylene, polyethylene / polypropylene composite material, etc. can be used as its material. The coating weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .

  The packaging form of the packaging sheet 58 can be determined as appropriate, but from the viewpoint of ease of manufacture and prevention of leakage of superabsorbent polymer particles from the front and rear edges, a cylinder is used to surround the front and back and both sides of the absorber 56. It is preferable that the front and rear edges be wound around the front and rear edges of the absorbent body 56, and the overlapping portions and the overlapping portions of the front and rear protruding portions be joined by joining means such as hot melt adhesive and material welding.

(indicator)
The absorber side of the liquid impermeable sheet can be provided with an indicator 80 that changes color upon contact with the liquid portion of the excrement. The indicator 80 is a coloring agent that exhibits a color reaction upon contact with liquid in the excrement and / or a color agent that exhibits a color reaction by detecting the pH in water or a color reaction due to a reaction with body fluid Is a reaction in which the pigment disappears, a reaction in which the coloring agent dissolves (disperses) and spreads or disperses in the urine, or an ink or adhesive containing an agent that exhibits other visual changes, or visual contact by contact with water or body fluid It is comprised by the sheet-like member containing the chemical | medical agent (indicator reaction means) which shows a change. For example, a water-soluble, water-degradable dye or leuco dye and a phenolic compound that causes the leuco dye to be colored as a coloring agent that exhibits a color reaction upon contact with water such as body fluid, an acidic substance, an electron accepting substance, etc. It is possible to use a colorant consisting of a developer of

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

  An indicator 80 constituted by the above-mentioned ink or adhesive is applied to a predetermined application area as shown in FIGS. 2 and 3. The indicator 80 shown in FIG. 2 and FIG. 3 shows the application area of the above-mentioned ink or adhesive. This region is preferably included in the arrangement range of the absorber 56, and is located at the center in the width direction and has a width of about 0.2 to 5 cm, preferably about 0.4 to 2 cm, and a length of the entire diaper length L 20% to 70% of the area, and is an area where contact with waste absorbed by the absorber 56 is efficiently performed. The indicator 80 is between the back surface of the absorber 56 and the liquid impermeable sheet 11, specifically, the side of the absorber 56 of the liquid impermeable sheet 11, or the inner surface of the packaging sheet 58 so as to be visible from the outer surface of the diaper. Or it is desirable to form by applying the ink or adhesive which comprises the indicator 80 on the outer surface. The application pattern is not particularly limited, and may be applied in a strip shape as shown in FIG. 7 or a large number of streaks as shown in FIG. 10, or in a pattern consisting of a surface or other figures. In the case of band-like patterns, the application width is 2 to 5 mm, and in the case of multiple streak patterns, the application width per line is 1 to 2 mm, and 2 to 4 lines are arranged at intervals of about 0.5 to 1.5 mm. Is preferred. Of course, it is also possible to separately manufacture a sheet on which the indicator 80 is formed and to incorporate the sheet-like indicator 80 in the diaper. The indicator 80 is preferably arranged at a distance of 5 mm or more, particularly 10 mm or more, with decorative printing to be described later, because the color change can be easily understood.

  The components of the indicator 80 are those in which a coloring agent is added to the ink when the indicator 80 is composed of an ink, and when the indicator 80 is composed of an adhesive, a resin such as a water-soluble polymer or a hydrophilic polymer The water-insoluble component and the coloring agent are added. A specific example in the case of comprising an adhesive is a water-insoluble polymer consisting of polyethylene glycol molecular weight 100 to 500, polyvinyl pyrrolidone, vinyl acetate copolymer, and water-soluble polyester, non-water-soluble high polar tackifying resin and plasticizer. It consists of a sexing component and a coloring agent which indicates the acidity and the alkalinity (pH) of the contacting liquid by means of a color change.

  When the indicator 80 is made of an adhesive, various known adhesives can be used as the adhesive. As one example thereof, when using a hot melt adhesive, it is possible to prevent the diffusion and leaching of the colorant and the like by using the hot melt adhesive containing a colorant as the indicator 80. As compared with the case of providing the indicator, the process of attaching the indicator can be largely saved because the process can be easily performed inline.

  On the other hand, when using the indicator 80 which consists of a sheet-like member, between this liquid-impermeable sheet 11 and the absorber 56, specifically, between the absorber 56 and the inner surface of the packaging sheet 58 this sheet-like member Alternatively, it is disposed between the back surface of the packaging sheet 58 and the liquid impermeable sheet 11. When this sheet-like indicator 80 is used, although the number of members is increased as compared with the case where the liquid indicator 80 is provided and provided, it is possible to easily use only the necessary amount for the necessary site Thus, the cost can be reduced by reducing the use area of the sheet-like member including the indicator reaction means.

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

  The exterior bodies 12F, 12B have a waist portion which is a range in the front-rear direction corresponding to the waist 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 the ridge portion cover portion 14 extending from the waistline region T to the intermediate region L side. doing. Although not shown, the front exterior body 12F is provided with a heel cover portion extending from the waist region T toward the intermediate region L side, the groin cover portion is provided but the collar portion cover portion is not provided, or the front exterior body 12F and It is not necessary to provide a portion corresponding to the middle region L in both of the back side exterior body 12B. Further, in the illustrated embodiment, the lower edge of the buttocks cover portion 14 is formed in a straight line along the width direction as the lower edge of the front exterior body 12F, but is positioned closer to the waist opening as it goes outward in the width direction. It can also be a curve that

  As shown in FIG. 4, FIG. 5 and FIG. 8, the outer casings 12F and 12B are formed by joining the outer sheet layer 12S and the inner sheet layer 12H by a bonding means such as a hot melt adhesive or welding. The sheet material for forming the outer sheet layer 12S and the sheet material for forming the inner sheet layer 12H are common single sheet materials as shown in FIG. 5 or individual ones as shown in FIG. It can also be a sheet material. That is, in the case of the former, the inner sheet layer 12H and the outer sheet layer 12S are respectively formed by the inner portion and the outer portion of a sheet of sheet material folded back at the edge of the waist opening WO (may be the edge on the crotch side). Be done. In the former form, there is an advantage that the inner sheet layer 12H and the outer sheet layer 12S are not easily displaced when pasted together, and in the latter form, there is 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, Non-woven fabrics made of mixed fibers, composite fibers, etc., of which the species or more are used can be used. Furthermore, the non-woven fabric may be produced by any processing. Examples of the processing method include known methods such as spun lace method, spun bond method, thermal bond method, melt blown method, needle punch method, air through method, point bond method and the like. When using a nonwoven fabric, it is preferable to make the fabric weight into about 10-30 g / m < ² >.

Moreover, it is preferable that the fabric weight of exterior body 12F, 12B is about 20-60 g / m < ² >.

(Stretch area, non-stretch area)
In the outer coverings 12F and 12B, elongated elastic elastic members 15 to 19 such as thread rubber are provided between the outer sheet layer 12S and the inner sheet layer 12H in order to enhance the fit of the wearer around the waist. An elastic region that elastically expands and contracts in the width direction is formed along with the expansion and contraction of the member. In this elastic region, in the state of natural length, the outer sheet layer 12S and the inner sheet layer 12H contract along with the contraction of the elastic elastic member to form wrinkles or wrinkles, and when it extends in the longitudinal direction of the elastic elastic member, Elongation is possible to a predetermined elongation that allows the outer sheet layer 12S and the inner sheet layer 12H to expand without any problems. As the elongated elastic stretchable members 15 to 19, either synthetic rubber or natural rubber may be used.

  For bonding of the outer sheet layer 12S and the inner sheet layer 12H in the outer package 12F, 12B and fixing of the elongated elastic elastic members 15 to 19 sandwiched therebetween, hot melt adhesive and heat seal by various coating methods At least one of fixing means by material welding such as ultrasonic sealing can be used. It is preferable not to bond or weakly bond portions of the elongated elastic stretchable members 15 to 19 other than the bonding portions, since the entire surface of the outer coverings 12F and 12B is firmly fixed to lose flexibility. In the illustrated embodiment, a hot melt adhesive is applied only to the outer peripheral surface of the elongated elastic stretchable members 15 to 19 by an application means such as a comb gun or a sure wrap nozzle, and the elongated layer is held by being sandwiched between both sheet layers 12S and 12H. Fixing of the elongated elastic stretchable members 15 to 19 to both sheet layers 12S and 12H and fixing between both sheet layers 12S and 12H only with the hot melt adhesive applied to the outer peripheral surface of the elastic stretchable members 15 to 19 It has a structure to do. The elastic stretchable 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 stretch direction in the stretch region.

More specifically, between the outer sheet layer 12S and the inner sheet layer 12H in the waist portion W of the exterior body 12F, 12B, the plurality of waist elastic elastic members 17 are vertically spaced so as to be continuous over the entire width direction. It is attached with no space. In addition, one or more of the waist elastic elastic members 17 disposed in the area adjacent to the lower waist portion U may overlap the interior body 200, or may be in the width direction overlapping the interior body 200. It may be provided on both sides in the width direction except for the central part. The waist elastic elastic member 17 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of a synthetic rubber. In the case of natural rubber, a cross-sectional area of 0.05 to 1.5 mm ² , particularly 0.1 to 1). the rubber thread .0mm about ²⁾ is preferably provided about 3 to 22 present at intervals of 4 to 12 mm, which according to the width direction of elongation of the waist portion W 150 to 400%, especially at about 220 to 320 percent Preferably there. In addition, it is not necessary to use the waist elastic elastic member 17 having the same thickness in all the longitudinal directions or to make the same expansion ratio, for example, the elastic elastic members 17 in the upper and lower portions of the waist W The thickness and elongation rate of the film may be different.

  Further, between the outer sheet layer 12S and the inner sheet layer 12H in the lower waist portion U of the outer coverings 12F, 12B, a plurality of lower waist elastic elastic members 15, 19 formed of elongated elastic elastic members are vertically spaced It is attached with no space.

The waist lower elastic elastic members 15 and 19 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, a cross-sectional area of 0.05 to 1.5 mm ² , particularly 0.1) It is preferable to provide about 5 to 30 yarn rubbers of about 1.0 to 1.0 mm ² ) at intervals of 1 to 15 mm, particularly 3 to 8 mm, and the extension ratio in the width direction of the lower waist part U by this is 200 to 350% In particular, about 240 to 300% is preferable.

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

The cover elastic elastic member 16 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of a synthetic rubber. In the case of a natural rubber, a cross-sectional area of 0.05 to 1.5 mm ² , particularly 0.1 to 1. It is preferable to provide about 2 to 10 yarn rubbers of about 0 mm ² ) at intervals of 5 to 40 mm, particularly 5 to 20 mm, and the extension ratio of the cover part in the width direction by this is 150 to 300%, particularly 180 to 260 % Is preferred.

  In the case where the front outer covering body 12F is provided with the inguinal diameter cover portion, the cover portion elastic stretchable member can be similarly provided.

  In the case where the elastic stretchable members 15, 16 and 19 are provided in the front-rear direction range having the absorber 56 like the lower waist portion U and the buttocks cover portion 14 in the illustrated embodiment, the width of the absorber 56 in part or all In order to prevent shrinkage in the direction, the widthwise middle (preferably including the whole of the inner and outer fixed portions 201) including a part or all of the portion overlapping the absorber 56 in the widthwise direction is taken as the non-stretchable area A1 Both sides in the direction are set as an expansion and contraction area A2. The waist portion W is preferably set as the stretchable region A2 over the entire width direction, but as in the waist lower portion U, the non-stretchable region A1 may be provided in the middle in the width direction.

  The stretchable area A2 and the non-stretchable area A1 are formed of elastic stretchable members 15 to 17 and 19 between the inner sheet layer 12H and the outer sheet layer 12S having the print sheet 25 fixed to the inner surface by the hot melt adhesives H1 and H2. The elastic stretchable members 15, 16 and 19 are fixed via hot melt adhesive at both ends in at least the stretch direction in the stretchable area A2, and not fixed in the area to be the non-stretchable area A1. In the region where the elastic stretchable members 15, 16 and 19 are cut at one location in the width direction by pressing and heating, or almost all of the elastic stretchable members 15, 16 and 19 are finely cut by pressure and heating The non-stretchable area A1 can be constructed by killing the stretchability while leaving the stretchability in the stretchable area A2. In the case of the former, as shown in FIG. 4, in the non-stretchable area A1, a state in which the cutting remainder continuous from the elastic stretchable members 15, 16 and 19 in the stretchable area A2 is contracted alone to the natural length as the unnecessary elastic stretchable member 18. In the latter case, although not shown, the cutting remainders continuous from the elastic stretchable members 15, 16 and 19 of the stretchable area A2 and the stretchable area A2 of both of them. The cut pieces of the elastic stretchable member not continuous with the elastic stretchable members 15, 16, 19 remain between the outer sheet layer 12S and the inner sheet layer 12H in a state in which they are independently contracted as natural elastic stretchable members to natural length.

<Example of tape type disposable diaper>
FIGS. 9-15 has shown an example of the tape type disposable diaper, code | symbol X in the figure has shown the full width of the diaper except a fastening tape, and code | symbol L has shown the full length of the diaper. This tape type disposable diaper has an absorbent body 56 extending from the ventral side to the dorsal side, a liquid-permeable top sheet 30 covering the front side of the absorbent body 56, and a liquid impermeable sheet 11 covering the back side of the absorbent body 56. A ventilated end flap portion EF and a dorsal end flap portion EF which are portions extending to the front side and the back side of the absorber 56 and not having the absorber 56, A pair of side flaps SF extending laterally beyond the side edge of the absorbent body 56 is provided. A waist along the circumference of the leg is formed in the middle of the side flap portion SF in the front-rear direction, and a fastening tape 13 is provided on the back side of the waist portion.

  Although the back surface of the liquid impermeable sheet 11 is covered with the exterior sheet 12 made of non-woven fabric or the like in the illustrated embodiment, the exterior sheet 12 can be omitted. The exterior sheet 12 extends to the periphery of the diaper, and the liquid impermeable sheet 11 extends to the front and rear edges of the diaper in the front and rear direction, and the side edge of the absorber and the side edge of the exterior sheet in the width direction If necessary, the liquid impermeable sheet 11 can be extended to the periphery of the diaper, for example, in the case where the exterior sheet 12 is not provided. As the exterior sheet 12, the same non-woven fabric used for the exterior of the pants-type disposable diaper can be used. Moreover, as an absorber, a top sheet, and the liquid impervious sheet 11, the same thing as the case of a pants type disposable diaper can be used.

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

  Also, as in the case of the pants-type disposable diaper, the absorbent body 56 can be interposed between the top sheet and the liquid impermeable sheet as an absorbent element packaged by the packaging sheet, and an intermediate between the top sheet and the absorbent element A sheet can be provided. The intermediate sheet 40 in the illustrated form is disposed shorter than the width of the absorbent element 50 in the center, but may be provided over the entire width. The longitudinal length of the intermediate sheet 40 may be the same as the total length of the diaper, may be the same as the length of the absorbent element 50, or may be within a short length centering on the liquid receiving area. Furthermore, as in the case of the pants-type disposable diaper, it is possible to provide an indicator 80 that changes color in contact with the liquid of excrement.

  On both sides in the width direction of the surface of the tape-type disposable diaper, solid gathers 60, 60 rising on the skin side are provided. The three-dimensional gathers 60, 60 are mainly composed of gather sheets 62, 62 folded back 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 extension portion extending from the root portion to the center side in the width direction, and a range in a range from on both sides of the side to the inner surface of each side flap portion SF Among the portions, it has an falling portion 67 which is a portion fixed to the top sheet 30 at both longitudinal ends, and a non-fixed free portion 68 located between the falling portions 67, at least the tip of the free portion 68 A gather elastic elastic member 63 is attached to the portion along the front and rear direction, and at the time of mounting, the free portion rises due to the contraction force of the gather elastic elastic member 63, and the leg circumference Results for resiliently brought into close contact with the so-called side leakage from around the leg is prevented.

  Further, in the illustrated embodiment, at the root portion of the three-dimensional gather 60 in each side flap portion SF, a leg elastic elastic member 69 made of thread rubber or the like between the gather sheet 62 and the liquid impermeable sheet 11 in the front-rear direction The side flap portion SF is configured to be flat gathers due to its contraction force. The leg elastic elastic members 69 may be disposed between the liquid impermeable sheet 11 and the exterior sheet 12 in the side flap portion SF. A plurality of leg elastic elastic members 69 may be provided on each side as in the illustrated example, or only one may be provided on each side.

  The fastening tape 13 in the illustrated embodiment includes a tape attachment portion 13C fixed to the side portion of the diaper, and a sheet base material forming the tape main body portion 13B projecting from the tape attachment portion 13C, and the tape main body portion 13B in the sheet base material. The locking portion 13A is provided at the middle portion in the width direction of the head, and the tip end side of the locking portion 13A is a knob. The tape attachment portion 13C of the fastening tape 13 is sandwiched between the gather sheet 62 forming the inner layer in the side flap portion and the exterior sheet 12 forming the outer layer, and is adhered to both sheets 62, 12 by the hot melt adhesive. . Further, the locking portion 13A is bonded to the inner surface of the tape main portion 13B by an adhesive.

  As the locking portion 13A, a hook material (male material) of a mechanical fastener (surface fastener) is suitable. The hook member has a large number of engagement protrusions on the outer surface side. The shape of the engaging projection is (A) L-shaped, (B) J-shaped, (C) mushroom-shaped, (D) T-shaped, (E) double J-shaped (J-shaped. Although there is a shape such as a shape coupled to a combination, any shape may be used. Of course, an adhesive material layer can also be provided as a locking portion of the fastening tape 13.

  Moreover, as a sheet base material which forms from the tape attachment part 13C to the tape main-body part 13B, a nonwoven fabric, a plastic film, a polylamination nonwoven fabric, paper, and these composite materials can be used.

  At the time of wearing the diaper, the fastening tape 13 is locked at a suitable position on the outer surface of the ventral side F in a state where the side flap portion SF on the back side is overlapped on the outer side of the side flap portion SF on the ventral side. The position and size of the locking point of the fastening tape 13 can be arbitrarily determined.

  It is preferable to provide a target sheet 24 having a target for facilitating the locking at the locking point 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 thereof and in which the hooks of the locking portion 13A are detachably engaged. A thing can be used suitably. As an engaging layer in this case, in addition to a form in which a mesh-like body knitted with yarn and having a loop is attached on a film layer, a non-woven fabric layer of thermoplastic resin is intermittently sealed by ultrasonic sealing. Although the form attached to a film layer and the fiber of a nonwoven fabric makes a loop is known, either can be used suitably. Moreover, the filmless type target tape 20 without a film layer can also be used by embossing to the nonwoven fabric of a thermoplastic resin. In these target tapes 20, the fastening tape 13 is coupled by the hook of the fastening tape 13 being caught or caught in the loop.

  In the case where the locking portion 13A is a pressure-sensitive adhesive material layer, it is possible to use a sheet substrate made of a plastic film having a smooth surface that is rich in adhesiveness and subjected to peeling treatment.

  When the fastening portion of the fastening tape 13 on the ventral side F is made of non-woven fabric, for example, the exterior sheet 12 in the illustrated form is made of non-woven fabric and the fastening portion of the fastening tape 13 is the hook material 13A. The target sheet 24 can be omitted, and the hook material 13A can be entangled with the nonwoven 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 registration mark area 111 which is wider than the registration marks 29 and extends in the front-rear direction, and an inner decorative area 112 other than the registration mark area 111. In the registration mark area 111, only the registration mark 29 is printed at one position in the front-rear direction, and the inside decoration area 28 is provided with the inside decoration print 28. By thus providing only the registration marks 29 in the registration mark area 111 of the liquid impermeable sheet 11 and providing the inner decorative print 28 in the other areas, it is possible to reliably avoid erroneous recognition of the registration marks 29.

  And, characteristically, the absorbent body 56 of the liquid impermeable sheet 11 as shown in FIGS. 2, 4 and 5, the embodiments shown in FIGS. 7 and 8, and the embodiments shown in FIGS. 10 and 14. On the opposite side, there is provided an outer member 24, 25 having a portion overlapping with the registration mark area 111 and having an outer decorative print 27 in the portion overlapping the registration mark area 111. That is, the outer decorative print 27 is applied to the portion of the outer side members 24 and 25 overlapping the registration mark area 111 instead of forming the decorative print of the entire article only by the inner decorative print 28 of the liquid impermeable sheet 11. When viewed from the outer surface, the outer decorative print 27 appears in a portion overlapping the dedicated area of the registration mark 29, and the same decorative effect as in the case of providing the inner decorative print 28 in the registration mark area 111 is obtained. . Therefore, the decorative printing range in the case where the liquid impermeable sheet 11 has the registration marks 29 and the decorative prints 27 and 28 can be effectively expanded.

  The shape of the registration mark 29 can be appropriately determined, but in the case of the minimum size, 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. The length is preferably 5 mm or more, particularly 15 mm or more, and the length in the front-rear direction is 5 mm or more. If this condition is satisfied (if it includes this minimum rectangular range), its shape may be a simple figure such as a circle or a polygon, and in the normal case the length in the width direction is It is preferable that the length in the front-rear direction be about 5 to 20 mm. Although the width of the registration mark area 111 can be appropriately determined, the inner decorative print 28 and the registration mark 29 may be separated by 5 mm or more, preferably by 10 mm or more, in order to avoid erroneous recognition. Further, the registration marks 29 may be printed on either the front side or the back side of the liquid impermeable sheet 11.

  Although the number and arrangement of the registration mark areas 111 are not particularly limited, it is desirable that only one is provided in the widthwise middle portion, in which case the outer members 24 and 25 and the outer decorative print 27 are of the absorbent article. It is desirable to be disposed so as to include a portion overlapping the registration mark area 111 on at least one of the front side from the front-rear direction center and the rear side from the front-rear direction center. When the registration mark area 111 is positioned at both ends in the width direction of the liquid impermeable sheet 11, the printable range of the inner decorative print 28 becomes significantly narrower and the outer decorative print 27 of the outer members 24, 25 compensates. It becomes difficult. In addition, when the registration mark area 111 is positioned at any one end in the width direction of the liquid impermeable sheet 11, it is difficult to balance the left and right in the appearance.

  Although the inner decorative print 28 may be provided in a region overlapping the outer members 24 and 25 in the liquid impermeable sheet 11 as in the illustrated embodiment, the inner decorative print 28 is not provided (the outer members 24 and 25 and If the inner decorative print 28 does not overlap with each other, the inner decorative print 28 is partially hidden by the outer members 24 and 25 even if the outer members 24 and 25 use a member with low visible light transmittance. It is preferable because the appearance does not deteriorate. In the case of providing an area without the inner decorative print 28 in this way, the inner decorative print 28 may overlap with the outer decorative print 27 if the position is shifted. Because the registration mark 29 can be used for positioning, positional deviation of the area without the inner decorative print 28 is unlikely to occur.

  The type, shape, and dimensions of the inner decorative print 28 and the outer decorative print 27 are not particularly limited. The decorative print 27, 28 is a continuous decorative print consisting of a large number of constituent units such as characters (size, brand name, manufacturer's name, pattern name, etc.) repeating regularly in the front-rear direction and width direction (FIG. 2 7 and 10), as well as the product logo, and the intermittent decoration print (FIG. 2, FIG. 7 and FIG. 10 (see the outer decorative print 27), and either of the inner decorative print 28 and the outer decorative print 27 may be employed. However, although continuous decorative printing has little influence on the appearance even if the cutting position at the front and rear ends is somewhat shifted, the positional deviation between members having continuous decorative printing is noticeable, and the appearance is deteriorated. On the other hand, in the case of having intermittent decoration printing during continuous decoration printing, the deviation between the two is inconspicuous. Therefore, when the member having the inner decorative print 28 and the member having the outer decorative print 27 are separated as in the illustrated embodiment, it is desirable that the inner decorative print 28 be a continuous decoration and the outer decorative print 27 be an intermittent decoration. Also, 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, 25 or may be printed on both the front and back sides.

  When providing the indicator 80 which discolors in contact with the liquid portion of the excrement, it is desirable to provide the indicator 80 on the side of the absorber 56 in the registration mark area 111 of the liquid impermeable sheet 11. Moreover, in that case, it is desirable not to have the outer decorative print 27 in the area overlapping the indicator 80, and it is preferable to separate them by 5 mm or more, particularly 10 mm or more. Although the registration mark area 111 can be provided with the outer decoration print 27 or the outer decoration print 27 avoiding the registration mark 29 over the entire area, it is an area without the inner decoration print 28, so the illustrated form By using this as the installation area of the indicator 80 and not providing the outer decoration print 27 in the area overlapping with the indicator 80, the efficiency of the registration mark 29, the decoration print 27, 28 and the indicator 80 can be improved. Can be arranged.

  The outer members 24 and 25 having the outer decorative print 27 may be provided with a member having a shape substantially corresponding to a part or all of the registration mark area 111, but includes a part or all of the registration mark area 111 A member may be provided which covers a larger range than the registration mark area 111 in at least one of the width direction. Further, it is needless to say that besides providing dedicated members as the outer members 24 and 25 as described below, existing members can be used. The outer members 24 and 25 may overlap the registration marks 29. In this case, the outer decorative print 27 and the registration marks 29 may overlap, but the printing position of the outer decorative print 27 does not overlap. It is preferable to adjust the position of the registration mark 29 to prevent the appearance of the outer decoration print 27 from being deteriorated due to the appearance of overlapping with the outer decoration print 27 and the registration 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 in which the liquid impermeable sheet 11 is built in the interior body 200 is generally used. Moreover, since it is common to interpose the printing sheet 25 in the inside of the exterior body 12 or between the interior body 200 and the exterior body 12, it is common to use the printing sheet 25 to perform the outer decorative printing 27. It is a preferred form. That is, as shown in FIGS. 2 to 5 and FIGS. 7 and 8, the inner decorative print 28 is provided on the liquid impermeable sheet 11 of the inner body 200, and at least at least the front exterior body 12F and the rear exterior body 12B. It is one preferable form to incorporate the printing sheet 25 having the outer decorative print 27 in the non-stretchable area A1 on one side.

The substrate 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 or a resin film 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 of such a thickness and density can be produced by setting the crepe ratio to about 10% at a basis weight of 10 g / m ² or more. The density can be calculated from the basis weight and the thickness. Moreover, a crepe rate is a value calculated by ((peripheral velocity of a Yankee dryer)-(peripheral velocity of a take-up reel)) / (peripheral velocity of a Yankee dryer) x 100 (%). Since the print sheet 25 is easily seen through from the product outer side when it is close to the product outer surface, as shown in the drawing, between the outer sheet layer 12S and the inner sheet layer 12H, adjacent to the inner surface of the outer sheet layer 12S. Although it is desirable to be provided, it may be provided adjacent to the outer surface of the inner sheet layer 12H, and may be provided between the exterior body 12 and the interior body.

  Moreover, in the tape type disposable diaper, since the target sheet 24 is located outside the liquid impermeable sheet 11 and is a member suitable for printing, it is one of the things to perform the outer decoration printing 27 using this It is a preferred form. The outer decorative print 27 can be applied to the film layer when the target sheet 24 includes a film layer, and to the non-woven fabric that is an engagement layer in the case of a filmless type that does not include a film layer.

  FIG. 19 schematically shows a process of feeding out the liquid impermeable sheet 11 having the registration marks 29 from the original film roll and detecting the registration marks 29 by an optical detection device such as a photoelectric tube prior to bonding with other members. Is shown. That is, on the original fabric roll 11R of the continuous belt-like liquid-impervious sheet 11 in which unit parts to be incorporated in each article are repeated continuously, registration marks 29 (inside the inner decorative print 28 on each unit part 11U) The register mark is printed. The liquid impermeable sheet 11 shown in FIG. 19 has an inner decorative print 28 and a registration mark 29 in the form shown in FIG. The liquid-impervious sheet 11 drawn from the raw fabric roll 11R is in a suitable position until the liquid-impervious sheet 11 is cut in the assembly line of the product, particularly before being bonded to another member In the state, the registration mark 29 is detected by an optical detection device PD such as a phototube, and the draw of the liquid impermeable sheet 11 is made based on the detection result (for example, according to the displacement of the registration mark 29 position from the cutting position). Perform control (tension control). By such conveyance control, it is possible to prevent the positional deviation of the decorative prints 27 and 28 caused by the change in the elongation of the liquid impermeable sheet 11. In the present embodiment, after the liquid-impervious sheet 11 is coated with the indicator 80 and assembled to the inner body 200 together with the top sheet 30 and the absorber 56, it is attached to the outer body 12 having the printing sheet 25 separately manufactured. As a result, the outer decorative print 27 of the printing sheet 25 and the inner decorative print 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 indicated in the specification.

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

  "Stretch rate" means the value when 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 the superabsorbent polymer is added, and the mixture is stirred by a stirrer. The formed gel is left in a constant temperature and humidity chamber at 40 ° C. × 60% RH for 3 hours and then returned to normal temperature, and the gel strength is measured with a curd meter (manufactured by I. techno Engineering: Curdmeter-MAX ME-500).

  ・ "Age" is measured as follows. After pre-drying the sample or test piece, it is left in a test room or apparatus under standard conditions (the test place is at a temperature of 20 ± 5 ° C. and a relative humidity of 65% or less) to be in a constant weight state. Pre-drying means making a sample or a test piece constant weight in an environment not exceeding a relative humidity of 10 to 25% and a temperature of 50 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture percentage is 0.0%. A sample of 200 mm × 250 mm (± 2 mm) in size is cut out from a test piece in a constant weight state using a rice-based board (200 mm × 250 mm, ± 2 mm). The weight of the sample is measured, and the weight per square meter is calculated and taken as the basis weight.

- "thickness" is used automatic thickness measuring instrument (KES-G5 Handy Compression measurement program), load: 0.098 N / cm ^2, and the pressure area: automatically measured under the conditions of 2 cm ^2.

  The amount of water absorption is measured according to JIS K 7223-1996 “Test method of water absorption of highly water-absorbent resin”.

  -Water absorption rate is defined as "time to end point" when JIS K 7224-1996 "Water absorption rate test method for super absorbent polymer" 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 conducted in the test room or equipment in the standard condition (the test place is temperature 20 ± 5 ° C, relative humidity 65% or less) .

  Although the said example is an application example with respect to a pants type disposable diaper, this invention can be utilized generally to absorbent articles, such as a tape type disposable diaper, a pad type disposable diaper, and a sanitary napkin.

  A1 ... non-stretching area, A2 ... stretching area, L ... middle area, LO ... leg opening, T ... waist area, U ... waist lower part, W ... waist section, WO ... waist opening, 11 ... liquid impermeability Seat 12 12 exterior body 12 side seal portion 12B rear side exterior body 12F front side exterior body 12H inner sheet layer 12S outer sheet layer 12r waist side folded portion 14 heel portion cover portion , 18 ... unnecessary elastic stretchable member, 20 ... crotch side folded portion, 200 ... interior body, 201 ... inside and outside fixed part, 22 ... cutting trace, 24, 25 ... outside 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: absorbent body, 58: packaging sheet, 0 ... standing gathers, 62 ... gather sheet 80 ... indicator, 111 ... registration mark area, 112 ... inner decoration region.