JP4243063B2 - Absorbent article and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an absorbent article such as a disposable paper diaper and a sanitary napkin, and more particularly to an absorbent article capable of visually determining from the outside whether or not body fluid such as urine is excreted.
[0002]
[Prior art]
Examples of disposable paper diapers that can be informed of the presence or absence of urination with ink include Japanese Utility Model Publication Nos. 3-40272, 3-58416, and Japanese Patent Application Laid-Open No. 9-299401.
[0003]
[Problems to be solved by the invention]
However, conventionally, a mark or design (so-called notice mark) for knowing the presence or absence of urination is generally applied to the absorbent side of the liquid-impermeable back sheet by printing or the like. In the state where the absorbent body is interposed between the surface sheet and the surface sheet, it is cut at the position between the adjacent absorbent bodies to produce individual products. Therefore, the design is displayed substantially continuously on the back sheet before cutting so that the design appears even if cut at any position.
[0004]
On the other hand, in a paper diaper called a development type or a tape type, a so-called front target tape (or sheet) for fixing or joining the tape to the front body may be provided on the outer surface of the back sheet. . In this case, the front target sheet is provided with a mark as a target and a mark or design for entertainment.
[0005]
However, because of the structure, the so-called notice mark overlaps with the design of the front target tape, and when viewed from the back, it gives the impression that it is a product that is not aesthetically pleasing for mothers. In particular, the boundary portion is not interested in the design.
[0006]
On the other hand, when a notice mark is applied over substantially the entire length of the back sheet, particularly with water-soluble ink, when the wearer sweats, the mark ink component melts in the flap part that is separated from the absorber. It oozes out to the surface and adheres to the skin, causing rashes.
[0007]
Therefore, the problem of the present invention is that the design of the product is excellent, the distinction of the design becomes clear, the visibility of the presence / absence of urination and the ease of discrimination are excellent, and the ink does not bleed into the skin. There is to do. Furthermore, it is providing the manufacturing method which can obtain the product which shows this effect suitably.
[0008]
[Means for Solving the Problems]
The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
An absorbent main body mainly composed of an absorption element that absorbs body fluid, a liquid-impervious sheet provided on the back side of the absorbent main body, and an outer sheet provided on the back side of the liquid-impervious sheet. ,
The outer sheet is formed by laminating and fixing two or more non-woven fabrics, and a shrink member is provided between the outer sheets in the waist part, the waistline part, and the crotch part,
The contraction member is configured not to exist at the center in the width direction of the portion corresponding to the absorbent main body,
In the absorbent article of the pants-type paper diaper, the absorbent main body is bonded and integrated with a hot melt adhesive substantially on the entire back surface of the outer sheet.
On the use surface side of the liquid-impervious sheet, a first design part that causes a visual change when it comes into contact with excretory fluid is pre-printed with printing ink at a position within the occupation area of the absorbent element,
A second design sheet different from the liquid-impervious sheet is provided on the back side from the liquid-impervious sheet so as to overlap with the liquid-impervious sheet when viewed from the plane.
This second design sheet has a second design part,
The visual change of the first design part and the second design part are visible from the back side of the product, and the first design part and the second design part are different positions as seen from the back side. Absorbent article characterized by being present in
[0009]
(Function and effect)
As an example, an absorbent body can be cited as a typical example.A liquid-impervious sheet is provided on the back side of the absorbent element that absorbs body fluid, and a visual change occurs when it comes into contact with excretory body fluid at a position in the occupation area of the absorbent element Since there is one design part, it will be surely in contact with the body fluid that passes through the absorbent element and a visual change will surely occur.
On the contrary, since the first design portion is not outside the area occupied by the absorbing element, the ink component for the mark melts and oozes out to the surface through the surface sheet, and does not adhere to the skin and cause rash.
Further, since the first design part and the second design part are present at different positions when viewed from the back side, the first design part can be clearly distinguished from the second design part, and the presence or absence of urination can be easily performed. It will be discernable. The second design portion can be clearly distinguished from the first design portion, and when the second design sheet is a front target tape, the target position of the tape can be easily determined, and mounting becomes easy.
If the surface energy of the liquid-impervious sheet is 34 to 42 dyne as measured according to JIS K 6768, the visual change of the notice mark is surely exhibited, the ink has good printability, and the ink impervious liquid. Good adhesion or adhesion to the conductive sheet substrate is obtained. That is, when the surface energy is large, the adhesiveness of the ink is excellent. However, when the surface energy is excessively large, visual changes such as disappearance may not occur even when contacting with a body fluid (for example, urine).
[0010]
<Invention of Claim 2>
The absorbent article according to claim 1, wherein the display of the first design portion is an appropriate mark that is displayed at least in the occupied area of the absorbent element in the crotch and dispersed in the front-rear direction or the width direction.
[0011]
[0012]
<Invention of Claim 3>
An absorbent main body mainly composed of an absorption element that absorbs body fluid, a liquid-impervious sheet provided on the back side of the absorbent main body, and an outer sheet provided on the back side of the liquid-impervious sheet. ,
The outer sheet is formed by laminating and fixing two or more non-woven fabrics, and a shrink member is provided between the outer sheets in the waist part, the waistline part, and the crotch part,
The absorbent member is configured not to exist at the center in the width direction of the portion corresponding to the absorbent main body,
In the continuous manufacturing method of the pants-type paper diaper, the absorbent main body is bonded and integrated with a hot melt adhesive to the outer sheet substantially on the entire back surface.
Against external sheet through the continuous line, with incorporating the second design sheet as a pre-cut individual pieces in the stream relative to overall sheet, liquid-impervious as a pre-cut separate pieces Incorporating an adhesive sheet, followed by an absorbent element that absorbs body fluids, after which individual products are obtained,
The liquid-impervious sheet is a liquid-impervious moisture-permeable film sheet, and the stretch rate when a 50 mm sample is stretched with a load of 1 kg is 20% or less,
The liquid-impervious sheet is pre-printed with printing ink at the position within the occupation area of the absorbent element, the first design part that causes a visual change when contacted with excretory fluids,
A second design sheet different from the liquid-impervious sheet is provided on the back side from the liquid-impervious sheet so as to overlap with the liquid-impervious sheet when viewed from the plane.
This second design sheet has a second design part,
In the commercialization step, the visual change of the first design part and the second design part are visible from the back side of the product, and the first design part and the second design part are the back side. The manufacturing method of the absorbent article characterized by controlling so that it may exist in a different position seeing from the side.
[0013]
(Function and effect)
Against external sheet through the continuous line, with incorporating the second design sheet as a pre-cut individual pieces in the stream relative to overall sheet, liquid-impervious as a pre-cut separate pieces A self-adhesive sheet, followed by an absorbent element that absorbs body fluids, after which individual products are obtained.
At this time, when the first design part and the second design part are present at different positions when viewed from the back side, that is, when they are not overlapped, in the commercialization process, the outer shape sheet continuously flowing through the line is used. Then, the second design sheet as an individual piece cut in advance is incorporated, and then an absorbent element that absorbs body fluid is incorporated to produce a product. Therefore, the first design sheet and the second design for the outer shape sheet As long as the seating timing is controlled, the overlap between the first design portion and the second design portion can be easily avoided.
As described above, the assembly timing of the liquid-impervious sheet is an important control element. However, if the expansion ratio of the liquid-impervious sheet is large, the positioning with respect to other sheet members is out of alignment only by the integration timing control. There is much to be done. However, by setting the expansion ratio to 20% or less, the alignment can be sufficiently performed only by the built-in timing control, and the overlap between the first design portion and the second design portion can be easily avoided.
[0014]
<Invention of Claim 4>
The display of the 1st design part was made into the suitable mark displayed in the occupation area of the said absorption element in the crotch part, and was disperse | distributed and displayed in the front-back direction or the width direction. Production method.
[0015]
[0016]
<Invention of Claim 5>
The absorbent article is a paper diaper, and a second design sheet is provided separately for the front body and the back body, and each of the first design part and each second design part of each second design sheet is a back surface. The manufacturing method of the absorbent article of Claim 3 or 4 which exists in a different position seeing from the side.
[0017]
(Function and effect)
When the second design is provided on both the front body and the back body, it is conceivable to divide the second design sheet before and after one second design sheet, but the cutting position of the second design sheet is the line flow speed. The first design and the second design may overlap if they do not match. In contrast, the second design sheet is provided separately for the front body and the back body. However, as long as the timing for incorporating the second design sheet is controlled, the first design part and the second design part Overlap can be easily avoided.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings.
"Tape-type paper diaper example"
<First example>
This example has fastening pieces attached to both ends of the back side of the paper diaper, has a hook element on the fastening surface of the fastening piece, and forms an outer sheet constituting the back surface of the paper diaper as a non-woven fabric. Is a disposable diaper in which the hook element of the fastening piece can be engaged with an arbitrary portion of the surface of the non-woven fabric outer sheet .
[0019]
In addition, target printing, which is a measure of the position at which the hook element of the fastening piece is fastened, is applied to at least one of the non-woven fabric outer sheet and the lower sheet so as to be visible from the outside. Preferably, the non-woven fabric outer sheet has a liquid-impervious sheet that does not substantially allow liquid to permeate, and the liquid-impervious sheet that does not substantially allow liquid to permeate is subjected to target printing. In addition, a notice mark is provided on the side surface of the absorbent body of the liquid-impermeable sheet by, for example, printing.
[0020]
A specific example will be described with reference to the drawings. In the illustrated diaper, the liquid-permeable sheet 1 made of a nonwoven fabric or the like and a liquid-impervious sheet that does not substantially allow liquid to pass through, such as polyethylene and the like, are completely permeable. Between the liquid-impervious sheet 2 that is not allowed to pass, an absorbent body 3 made of cotton-like pulp or the like, for example, rectangular or preferably has an hourglass type rigidity as shown in the figure, is interposed. The absorbent body 3 can be covered with upper and lower tissue papers for absorption, and constitutes an absorbent element.
[0021]
The liquid-impermeable sheet 2 has a rectangular shape wider than the absorbent element, and an outer sheet 10 made of an hourglass-shaped non-woven fabric is provided on the outer side thereof.
[0022]
The liquid-permeable sheet 1 has a rectangular shape wider than the absorbent element, extends slightly outward from the side edge of the absorbent element, and is fixed to the liquid-impermeable sheet 2 by a hot melt adhesive or the like (this fixed part) ) And a fixed portion related to the present invention is indicated by a symbol *).
[0023]
On both sides of the disposable diaper, a leg-standing standing cuff B protruding toward the use surface is formed. The standing cuff B is a standing sheet 4 made of a breathable nonwoven fabric or the like substantially continuous in the width direction, and elastically stretchable. It is comprised by the member, for example, the elastic elastic member 5 for the leg periphery as shown in figure or one made of thread rubber. 7 is a fastening piece by a hook-and-loop fastener.
[0024]
Further, the standing cuff B is formed in a double form by folding the standing sheet 4 inwardly with a short inner surface side, and wraps the leg elastic elastic members 5 with a hot melt adhesive or the like.
[0025]
The inner surface of the double upright sheet 4 has a fixing start end at a position separated from the side edge of the liquid-permeable sheet 1, and extends in the width direction from the fixing start end to the extending edge of the liquid-impermeable sheet 2. Is fixed by a hot melt adhesive or the like. The outer surface of the double upright sheet 4 is fixed to the outer sheet 10 with a hot melt adhesive or the like on its lower surface.
[0026]
As a result, the starting end of the double standing sheet 4 that is fixed to the liquid-impermeable sheet 2 forms the standing end of the standing cuff B. Around the leg, the inside of the standing end is a free part that is not fixed to the product body, and it functions as a standing part that goes to the center of the product and a flat contact part that turns back halfway and goes outward. And conceptually divided.
[0027]
On the other hand, although not shown, at the front and rear ends in the longitudinal direction, the portion corresponding to the raised portion (extension portion of the raised portion) is directed to the product in a state toward the center side of the product, specifically through the hot melt adhesive or the like. It is fixed to the outer surface of the liquid sheet 1 and the liquid-impervious sheet 2, and is fixed on the upright portion corresponding portion in a state where the flat contact portion corresponding portion (extension portion of the flat contact portion) is turned upside down.
[0028]
The elastic stretchable member 5 has a basic form in which at least one elastic stretch member 5 is at the flat contact portion. In particular, the elastic stretchable member 5 is preferably at the front end portion of the flat contact portion, and is also elastic at the standing portion. It is preferable to have the elastic member 5.
[0029]
The optimum form is that it is in the vicinity of the standing end, in the vicinity of the turn-up, and at the tip of the flat contact portion. It is further desirable to have a plurality of tips at the tip of the flat contact portion as shown in the figure. In order to increase the standing force, the elastic members 5 and 5 can be further provided on the standing portion. In the illustrated form, there are six in total.
[0030]
When the disposable diaper is attached, the disposable diaper is attached to the body in the shape of a boat, and the contraction force of the elastic elastic members 5, 5... Acts, so as shown in FIG. The standing cuff B is raised by the contraction force 5.
[0031]
The space surrounded by the standing part forms a confined space for urine or soft stool. When urinating into this space, the urine passes through the liquid-permeable sheet 1 and is absorbed into the absorbent body 3, and the solid portion of soft stool becomes the barrier of the standing part of the standing cuff B, and the urine can be overcome. Is prevented. In the unlikely event that urine leaks laterally over the standing distal side edge of the standing part, side leakage is prevented by the stop function by the flat contact part.
[0032]
In this embodiment, it is desirable that the standing sheet 4 forming each standing cuff B is not liquid-permeable but substantially liquid-impervious (may be semi-liquid-permeable). Further, the liquid-permeable sheet (for example, non-woven fabric) that forms the upright sheet 4 may be repelled by silicon treatment or the like. In any case, it is preferable that the standing sheet 4 and the outer sheet 10 are air permeable, and the standing sheet 4 and the outer sheet 10 are each a sheet having a water pressure resistance of 100 mmH ₂ O or more, particularly a nonwoven fabric. . As a result, as shown in FIGS. 2 and 3, air permeability is exhibited at the side portion in the width direction of the product, and weariness of the wearer can be prevented.
[0033]
In particular, by using a non-woven fabric, it is possible to obtain a disposable paper diaper that produces almost no sound during wearing and gives a cloth-like feel. Non-woven fabric fibers constituting the outer sheet 10, the liquid-permeable sheet 1 and the upright sheet 4 include olefin-based, polyester-based, amide-based synthetic fibers such as polyethylene or polypropylene, and regenerated fibers such as rayon and cupra. Natural fibers such as cotton can be used, and nonwoven fabrics obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blow method, a needle punch method, or the like can be used.
[0034]
In the embodiment of the present invention, the liquid-impervious sheet 2 and the outer sheet 10 overlap each other in the separation portion, and therefore, the sheet is not broken in the standing and raising operation of the standing cuff B.
[0035]
<Fastening piece fastening to the front of the disposable diaper>
In this example, by using a hook-and-loop fastener as the fastening piece 7, the fastening piece 7 can be mechanically fixed to the outer sheet 10 made of a nonwoven fabric. Therefore, a so-called target tape can be omitted, and the fastening position by the fastening piece 7 can be freely selected.
[0036]
The fastening piece 7 has a base portion of a fastening base material 72 such as plastic, polyla-non-woven fabric, and paper shown in FIG. 5 joined to the outer sheet 10 by an adhesive, for example, and has a hook element 7A on the tip side. . The hook element 7 </ b> A is bonded to the fastening substrate 72 with an adhesive 73. The hook element 7A has a large number of engagement pieces 71 on the outer surface side thereof. As the shape of the engagement piece 71, there are a letter shape, a J shape, a mushroom shape, a T shape, and the like, and any of them may be used, but a T shape can be preferably used. A temporary fixing adhesive portion 7B is provided on the tip side from the hook element 7A. At the end of the assembly of the product, the temporary fixing adhesive portion 7B is adhered to the upright sheet 4 so as to prevent the fastening piece 7 from being peeled off at the front end side. At the time of use, it peels off against the adhesive force and brings the front end of the fastening piece 7 to the front body. The fastening base material 72 is exposed at the front end side of the temporary fixing adhesive portion 7B to form a tab tab portion.
[0037]
As shown in FIGS. 1, 3, and 4, a target printing sheet 20 as the second design sheet of the present invention is provided on the inner surface side of the outer sheet 10 on the opening side of the front body. Then, target printing is performed as the second design portion 21 that serves as an indication of the position at which the hook element 7A of the fastening piece 7 is fastened, and is applied so as to be visible through the outer sheet 10 from the outside. The target printed sheet 20 or the second design portion can have a longitudinal length of 10 to 400 mm and a waistline length of 50 to 500 mm. Target printing can be performed by gravure printing or flexographic printing.
[0038]
At least in this target printing-corresponding portion, for example, 3 to 20% of embossing per unit area is applied in zigzag form from the outer surface of the outer sheet 10 to the liquid-impermeable sheet 2 over the entire surface in the embodiment. In this embossed portion, the outer sheet 10 and the liquid-impervious sheet 2 are joined by heat fusion at a temperature of 160 ° C. or lower. This heat-sealed embossed portion 10A is shown in FIG. It is desirable that the back surface of the outer shape sheet 10 be raised in the whole or at least in the target printing corresponding part.
[0039]
On the other hand, the outer shape sheet 10 and the target print sheet 20 are joined together in a state in which the adhesive regions 11, 11... is there.
[0040]
The form of the second design portion 21 is appropriate, but it is desirable that the position in the width direction can be determined by the symbols (1) to (3), the color coding for each zone, or the design change. In addition, it is desirable that the target print sheet 20 has a color scheme that can be distinguished from surrounding colors. As for the thickness of the target printing sheet 20, 10-50 micrometers is desirable.
[0041]
The outer shape sheet 10 made of a nonwoven fabric is preferably made of single fibers or long fibers as a fiber material, and the denier number is 2.5 d or less.
[0042]
It is desirable that the shearing force between the surface of the outer sheet 10 and the hook element 7A is 0.8 N / cm ² or more and the peeling force is 1 N / 25 mm or more. Moreover, it is desirable that the sound when the fastening surface of the fastening pieces 7 fastened to each other and the surface of the nonwoven fabric outer sheet 10 are peeled off is 12.0 thorn or less.
[0043]
By the way, when engaging the hook element of a mechanical fastener with the external shape sheet 10, the form shown in FIG. 13 mentioned as a modification can be taken. That is, after forming the non-adhesive treatment areas 20A, 20A,... On the back surface side of the target print sheet 20 intermittently, for example, in stripes extending in the longitudinal direction by silicon treatment, the outer sheet 10 and the hot melt adhesive HM. To join. As a result, outer sheet 10, the non-adhesive treatment zone 20A and the target print sheet 20, since in 20A ... are not adhered, at the time of engaging the hook elements 7A to the outer sheet 10, outer sheet 10 is non-adhesive treatment zone 20A , 20A,..., 20A..., 20A. The hot melt adhesive HM may be appropriate, such as spiral coating or solid coating. If necessary, it is possible to form a non-adhesive treatment area on the surface of the outer sheet 10 on the use surface side.
[0044]
<Second example>
In the first example, the inner surface of the outer sheet 10, but the target print sheet 20 as a second design sheet is provided, as shown in FIG. 6 may be provided on the outer surface side of the outer sheet 10. In this case, no sheet can be interposed between the outer sheet 10 and the liquid-impermeable sheet 2. When the target printing sheet 20 is provided on the outer surface side of the outer shape sheet 10, the sheet is preferably a female material sheet having a loop-shaped fiber material with which a hook element is engaged with the outer surface.
[0045]
<About Notice Mark>
On the other hand, a first design sheet is arranged in the absorbing element to be absorbed or on the back surface side, and the first design sheet has a visual change when it comes into contact with excretory fluid at a position within the occupation area of the absorbing element. Have In the embodiment, the liquid-impermeable sheet 2 on the back surface side of the absorber 3 is used as a first design sheet, and the first design portion 30 is formed on the surface on the use surface side by, for example, printing.
[0046]
As shown in FIG. 7, the 1st design part 30 is located in the area | region of the absorber 3, and exists in the position which is different from the 2nd design part 21 seeing from the back surface side.
[0047]
The first design unit 30 may change visually when it comes into contact with excretory body fluids. For example, when it comes into contact with urine, a known design such as a color that disappears, a color that changes, or a color that appears appears. it can.
[0048]
The first design unit 30 can visually recognize the visual change from the back side of the product through the outer sheet 10 and the liquid-impermeable sheet 2.
[0049]
It is desirable that the first design part 30 is located at least in the crotch part. The first design unit 30 represents appropriate marks (drawings, characters, symbols, etc.) in the front-rear direction and / or the width direction in a distributed or associated manner, and the design region has a length in the front-rear direction of 150 to 350 mm and a length in the width direction. Is preferably 30 to 100 mm.
[0050]
The first design section 30 is printed on a first design sheet (liquid-impermeable sheet 2) substrate with printing ink, and the surface energy of the first design sheet is 34 to 42 dyne as measured according to JIS K 6768 Is desirable. Within this numerical range, a visual change of the notice mark is surely exhibited, and good printability of the ink and further good adhesion or adhesion of the ink to the first design sheet substrate can be obtained.
[0051]
"Pants-type disposable diaper example"
As shown in FIG. 8, the pants-type disposable diaper according to this embodiment is fixed to the flexible outer sheet 51 and the inner surface of the outer sheet 51 and extends in the longitudinal direction (front-rear direction) with the crotch 54 as the center. The main component is an absorbing element AB.
[0052]
The outer sheet 51 is formed by laminating and fixing two or three or more breathable / water-repellent nonwoven fabrics. In the waist part, the waistline part, and the crotch part, a shrink member 91 such as a rubber thread is provided between the outer sheets 51 and 51 to enhance the fit.
[0053]
At the final stage of the manufacturing process after superposing the outer sheet 51 and the absorbent main body 60, the entire longitudinal direction of both side edges of the front body and the back body is subjected to ultrasonic sealing, heat melting, etc. By joining by means, a waist opening WO and a pair of left and right leg openings LO are formed as shown in FIG.
[0054]
As shown in FIG. 9, the absorbent main body 60 is mainly composed of a rectangular liquid-permeable top sheet 61 made of a nonwoven fabric or the like that directly touches the wearer's skin and cotton-like pulp, and has a certain degree of rigidity (semi-rigid). ) Abstracting element AB composed of a rectangular absorbent body 63 and a frame-wrapped rectangular crepe paper 64 that wraps the entire upper and lower surfaces thereof, and a rectangle composed of a polyethylene plastic film or the like reaching the vicinity of both side edges on the back surface of the absorbing element AB. The liquid-permeable top sheet 61 wraps around the side edges of the absorbent element AB, reaches the back surface, and is superimposed on the liquid-impermeable back sheet 62. These elements are integrated by bonding with a hot melt adhesive. If necessary, a liquid-permeable second sheet 61S can be interposed between the liquid-permeable top sheet 61 and the crepe paper 64 as shown in the figure. The absorption main body 60 is integrated with the outer sheet 51 by being bonded to the outer sheet 51 with a hot melt adhesive.
[0055]
On both sides of the absorbent main body 60, leg-standing standing cuffs C, C projecting to the use surface side are formed, respectively. The standing cuffs C are substantially composed of a standing sheet 80 that is continuous in the width direction, an elastic member, for example, It is composed of one elastic rubber member 81 or a plurality of elastic members 81, 81 as shown in the figure.
[0056]
In more detail, the standing cuff C is formed by doubling the standing sheet 80 and wrapping each of the stretchable members 81, 81... With a hot melt adhesive or the like. The standing sheet 80 forming each standing cuff C, C is preferably not liquid-permeable but liquid-permeable or hydrophobic. Moreover, you may make it become a property which repels a liquid by a silicon process etc. with respect to liquid-permeable sheets, such as a nonwoven fabric. Furthermore, it is desirable to have air permeability or vapor permeability.
[0057]
The inner surfaces of the double upright sheets 80 go around the back surfaces of the absorbent element AB and the liquid-impermeable back sheet 62 and are fixed by a hot melt adhesive or the like. As a result, this fixed start end of the double upright sheet 80 forms the upright end of the upright cuff C. The tip side from the standing end is a free part that is not fixed to the product body.
[0058]
On the other hand, at the front and rear end portions in the longitudinal direction, the free portion is fixed to the article, specifically to the outer surface of the liquid-permeable sheet 61, with the tip thereof toward the center side of the article by hot melt adhesive or the like. .
[0059]
<Design and information mark>
Now, also in the present embodiment, the first design sheet is arranged in or on the back side of the absorbing element that absorbs bodily fluid, and the first design sheet comes into contact with the excretory body fluid at the position within the occupation area of the absorbing element. A second design sheet different from the first design sheet is provided, which has a first design part in which a visual change occurs and has a second design part on the back side of the first design sheet.
[0060]
That is, the liquid-impermeable back sheet 62 is a first design sheet, and the first design portion 30 is formed on the surface on the use surface side by, for example, printing.
[0061]
On the other hand, between the liquid-impermeable back sheet 62 and the outer sheet 51, the second design sheets 100A and 100B are interposed in the front body and the back body, respectively. Second design portions 101A and 101B having appropriate designs are formed on the second design sheets 100A and 100B, respectively.
[0062]
As shown in FIG. 11, the first design unit 30 is located in the region of the absorber 63, and is present at a position different from the second design unit second design units 101 </ b> A and 101 </ b> B when viewed from the back side. .
[0063]
The first design unit 30 may change visually when it comes into contact with excretory body fluids. For example, when it comes into contact with urine, a known design such as a color that disappears, a color that changes, or a color that appears appears. it can.
[0064]
The first design unit 30 can visually recognize the visual change from the back side of the product through the outer sheet 51 and the liquid-impermeable back sheet 62.
[0065]
It is desirable that the first design part 30 is located at least in the crotch part. The first design unit 30 represents appropriate marks (drawings, characters, symbols, etc.) in the front-rear direction and / or the width direction in a distributed or associated manner, and the design region has a length in the front-rear direction of 150 to 350 mm and a length in the width direction. Is preferably 30 to 100 mm.
[0066]
The first design section 30 is printed on a first design sheet (impermeable liquid back sheet 62) substrate with printing ink, and the surface energy of the first design sheet is 34 to 42 dyne as measured according to JIS K 6768. Things are desirable. Within this numerical range, a visual change of the notice mark is surely exhibited, and good printability of the ink and further good adhesion or adhesion of the ink to the first design sheet substrate can be obtained.
[0067]
"About manufacturing method"
Next, the continuous manufacturing method of the paper diaper of the present invention will be described.
<Example of tape-type paper diaper manufacturing method>
What is shown in FIG. 12 is an example of a method for manufacturing the above-described tape-type paper diaper, that is, a paper diaper in which a target print sheet 20 as a second design sheet is provided on the outer surface side of the outer sheet 10. Uses the outer sheet 10 as the main body sheet of the present invention, and therefore flows the outer sheet 10 continuously in a line.
[0068]
A continuous target print sheet material 20A on which the second design section 21 has been printed in advance on the outer shape sheet 10 is passed through the first camera (optical sensor) 201 portion, and then cut by the drum cutter 200 to be the target print sheet. As a result, the second design sheet is incorporated in the flow of the main body sheet in the present invention. Next, the bonded sheet is guided to the second bonding roll 203.
[0069]
The first design section 30 is printed in advance on the liquid-impermeable sheet material 2A as the first design sheet. After passing through the second camera 202 portion, the first design section 30 is cut and individualized by the drum cutter 205. 2 Lead to the laminating roll 203. The liquid-impermeable sheet 2 is bonded to the main body sheet in the present invention by being bonded to the outer sheet (main body sheet) 10 using a hot melt adhesive or the like at the second bonding roll 203 site. The first design sheet is incorporated in the process.
[0070]
Thereafter, individual absorbent bodies 3 as absorbent elements are intermittently supplied onto the liquid-impervious sheet 2 and subsequently the liquid-permeable sheet 1 is supplied, and these are appropriately placed at a position by a hot melt adhesive. Join. At the final stage of the line, it is cut by the cutter 206 to obtain individual products.
[0071]
In this case, the outer sheet 10 as the main body sheet is conveyed at a constant speed. In order to control the sticking position of the target print sheet 20 with respect to the outer shape sheet 10, the second design is detected by the first camera 201 and the feed speed of the target print sheet material 20 </ b> A led to the drum cutter 200 is controlled. On the other hand, for the liquid-impermeable sheet material 2A, the first design is detected by the second camera 202, and the feeding speed of the liquid-impermeable sheet material 2A is controlled.
[0072]
The two-feed control system is related to each other, so that the first design portion and the second design portion can be controlled to exist at different positions when viewed from the back side.
[0073]
<Other matters>
In each of the above examples, the first design sheet is a liquid-impervious moisture-permeable film sheet, and it is desirable that the stretch rate when a 50 mm sample is stretched with a load of 1 kg is 20% or less. Extensible materials make it difficult to position the design.
[0074]
On the other hand, tape-type paper diapers and pants-type paper diapers are usually stored in a package such as a polyethylene bag for sale. In such a case, it is interesting for the wearer (infant) and the wearer (parent) to make the first design and / or the second design different in one package. In addition, the combination of the first design and the second design can be made different in one package. In the case where the second design sheet is provided separately for the front body and the back body, the combination of the second designs of the second design sheet can be made different between the front body and the back body.
[0075]
【The invention's effect】
As described above, according to the present invention, the design of the product is excellent, and the distinction between the designs becomes clear. In addition, there are advantages such as a structure in which the ink does not bleed into the skin.
[Brief description of the drawings]
FIG. 1 is a development view of a tape-type paper diaper of the present invention.
FIG. 2 is a view taken along the line 2-2 in FIG.
FIG. 3 is a view taken along line 3-3 in FIG.
FIG. 4 is a front view of a main part cut away from the front body of the back surface.
FIG. 5 is an explanatory diagram of a fastening tape portion.
6 is an arrow view of a position corresponding to line 3-3 in FIG. 1 of another tape-type paper diaper. FIG.
FIG. 7 is an unfolded front view of the tape-type paper diaper from the back side.
FIG. 8 is a plan view from the use surface side in the unfolded state of the embodiment of the pant-type paper diaper.
FIG. 9 is a cross-sectional view of the front body part.
FIG. 10 is a perspective view of the use state of the product of the pants-type paper diaper.
FIG. 11 is an unfolded front view from the back side of the pants-type paper diaper.
FIG. 12 is a schematic diagram of a manufacturing process of a tape-type paper diaper.
FIG. 13 is a cross-sectional view of a modification of the first example of a tape-type paper diaper.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Liquid-permeable sheet, 2 ... Liquid-impermeable sheet (1st design sheet), 3 ... Absorber, 10 ... Outer shape sheet , 7 ... Fastening piece, 20 ... Target printing sheet, 21 ... 2nd design part, 30 DESCRIPTION OF SYMBOLS 1st design part, 51 ... Outer sheet, 60 ... Absorption main body, 61 ... Liquid-permeable top sheet, 62 ... Impervious back sheet (1st design sheet), 100A, 100B ... 2nd design sheet, 101A, 101B ... 2nd design part, B, C ... Standing cuffs.

Claims (5)

An absorbent main body mainly composed of an absorption element that absorbs body fluid, a liquid-impervious sheet provided on the back side of the absorbent main body, and an outer sheet provided on the back side of the liquid-impervious sheet. ,
The outer sheet is formed by laminating and fixing two or more non-woven fabrics, and a shrink member is provided between the outer sheets in the waist part, the waistline part, and the crotch part,
The contraction member is configured not to exist at the center in the width direction of the portion corresponding to the absorbent main body,
In the absorbent article of the pants-type paper diaper, the absorbent main body is bonded and integrated with a hot melt adhesive substantially on the entire back surface of the outer sheet.
On the use surface side of the liquid-impervious sheet, a first design part that causes a visual change when it comes into contact with excretory fluid is pre-printed with printing ink at a position within the occupation area of the absorbent element,
A second design sheet different from the liquid-impervious sheet is provided on the back side from the liquid-impervious sheet so as to overlap with the liquid-impervious sheet when viewed from the plane.
This second design sheet has a second design part,
The visual change of the first design part and the second design part are visible from the back side of the product, and the first design part and the second design part are different positions as seen from the back side. Absorbent article characterized by being present in The absorbent article according to claim 1, wherein the display of the first design portion is an appropriate mark that is displayed at least in the occupied area of the absorbent element in the crotch and dispersed in the front-rear direction or the width direction. An absorbent main body mainly composed of an absorption element that absorbs body fluid, a liquid-impervious sheet provided on the back side of the absorbent main body, and an outer sheet provided on the back side of the liquid-impervious sheet. ,
The outer sheet is formed by laminating and fixing two or more non-woven fabrics, and a shrink member is provided between the outer sheets in the waist part, the waistline part, and the crotch part,
The contraction member is configured not to exist at the center in the width direction of the portion corresponding to the absorbent main body,
In the continuous manufacturing method of the pants-type paper diaper, the absorbent main body is bonded and integrated with a hot melt adhesive to the outer sheet substantially on the entire back surface.
Against external sheet through the continuous line, with incorporating the second design sheet as a pre-cut individual pieces in the stream relative to overall sheet, liquid-impervious as a pre-cut separate pieces Incorporating an adhesive sheet, followed by an absorbent element that absorbs body fluids, after which individual products are obtained,
The liquid-impervious sheet is a liquid-impervious moisture-permeable film sheet, and the stretch rate when a 50 mm sample is stretched with a load of 1 kg is 20% or less,
The liquid-impervious sheet is pre-printed with printing ink at the position within the occupation area of the absorbent element, the first design part that causes a visual change when contacted with excretory fluids,
A second design sheet different from the liquid-impervious sheet is provided on the back side from the liquid-impervious sheet so as to overlap with the liquid-impervious sheet when viewed from the plane.
This second design sheet has a second design part,
In the commercialization step, the visual change of the first design part and the second design part are visible from the back side of the product, and the first design part and the second design part are the back side. The manufacturing method of the absorbent article characterized by controlling so that it may exist in a different position seeing from the side. The manufacture of the absorbent article according to claim 3, wherein the display of the first design part is an appropriate mark displayed dispersed in the front-rear direction or the width direction in at least the occupied area of the absorbent element in the crotch. Method. The absorbent article is a paper diaper, and a second design sheet is provided separately for the front body and the back body, and each of the first design part and each second design part of each second design sheet is a back surface. The manufacturing method of the absorbent article of Claim 3 or 4 which exists in a different position seeing from the side.

Images