JP2010284430A - Absorbent article and sheet cutter thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein a pattern can not be formed in a wide area of a back sheet because of the presence of a marker for accurately cutting a continuous body of the back sheet constituting a part of an absorbent article. <P>SOLUTION: The absorbent article 10 includes a top sheet, an absorber, the back sheet 17 on which the marker 21 and the pattern A are printed, and a cover sheet 11. The pattern A can be visually recognized through the cover sheet 11. The position of the marker 21 along the lateral direction of the back sheet 17 is located within an area where the pattern A is formed in the lateral direction of the back sheet 17. The marker 21 has a specific hue, and the pattern A located at a position in the lateral direction in the back sheet 17 corresponding to the position of the marker 21 along the lateral direction of the back sheet 17 has a different hue than the hue of the marker 21. Alternatively, the marker 21 can be formed by using a paint which emits fluorescence excited by the light of a specific wavelength. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an absorbent article and an apparatus for cutting a continuous body of sheets constituting a part thereof.

  In particular, disposable diapers for infants and the like are printed with a pattern and a charactor in addition to the color of the surface like clothes, so that users and wearers can use it happily. For example, in Patent Document 1, a liquid-impermeable nonwoven fabric printed with a colored nonwoven fabric or a pattern is used as a cover sheet for a disposable diaper, or a pattern such as a character is directly printed on the surface of a cover sheet. Are known. In addition, a liquid-impermeable back sheet is arranged inside the cover sheet of the disposable diaper, and a pattern is printed on the surface of the back sheet so that the pattern on the surface of the back sheet can be visually recognized through the cover sheet. Things are also well known.

  When manufacturing such a disposable diaper, a canned pattern is printed on a continuous body of a cover sheet and a back sheet at predetermined intervals in advance, and is drawn at a predetermined interval while being pulled out to form a disposable diaper production line. It is common to supply. For this reason, it is necessary to cut | disconnect the continuous body of a cover sheet or a back sheet | seat correctly according to the position of a pattern, and the marker for that is printed on the continuous body of the cover sheet and the back sheet with the pattern. And the technique which detects this marker using an optical sensor, and controls the cutting position of the continuous body of a cover sheet or a back sheet based on this is indicated by patent documents 2 and patent documents 3.

JP-A-5-247701 JP 2004-000648 A JP 2005-315651 A

  The conventional markers disclosed in Patent Document 2 and Patent Document 3 are formed at the widthwise end of a continuous body of sheets that move at high speed, and a sensor is disposed directly above or directly below the region through which the marker passes. . Therefore, a pattern is not formed at the width direction end of the continuous sheet, which is a marker detection area by the sensor, in order to avoid erroneous detection of the sensor. Even when the marker is formed only on one side in the width direction of the continuum of the sheet, the design is usually arranged around the center in the width direction of the sheet in consideration of the design balance of the design. It is. For this reason, a pattern cannot be formed at both ends in the width direction of the sheet, and it is difficult to form a pattern formation region over the entire width direction of the sheet.

  Further, in order to avoid erroneous detection by the sensor, the marker generally needs to have a low brightness hue close to black. For this reason, depending on the content of the symbol, the marker may greatly impair the design of the symbol.

  An object of the present invention is to provide an absorbent article that can form a marker that does not impair the design of the design, and that can form a design regardless of the formation position of the marker, and a sheet that constitutes a part of the absorbent article. An object of the present invention is to provide an apparatus for cutting a continuous body.

  According to a first aspect of the present invention, there is provided a liquid-impermeable cover sheet, a liquid-permeable top sheet joined to the cover sheet, and an absorber disposed between the cover sheet and the top sheet. An absorbent article in which a marker and a pattern are printed on the cover sheet, wherein the position of the marker along the width direction of the cover sheet is within the pattern formation region along the width direction of the cover sheet. It is characterized by that.

  Here, the symbols intended by the present invention are pictures of people, animals, plants, vehicles, food, tools, clothes, toys, buildings, natural objects, constellations, characters from myths and old tales, animated characters, etc. Or it consists of a photograph, a character, a symbol, a figure, a pattern, and a combination thereof, and includes differences such as a background and a hue thereof.

  The marker intended by the present invention only needs to have a contour shape that can be optically recognized by the sensor, and can include at least one of a character, a symbol, and a pattern.

  In the absorbent article according to the first aspect of the present invention, the marker has a specific hue, and the design at the position in the width direction of the cover sheet corresponding to the position of the marker along the width direction of the cover sheet is the hue of the marker. It may have a different hue. Alternatively, the marker is formed using a paint that emits fluorescence excited by light of a specific wavelength, and the pattern at the position in the width direction of the cover sheet corresponding to the position of the marker along the width direction of the cover sheet has a specific wavelength It is effective not to include a paint that emits fluorescence that is excited by the light.

  According to a second aspect of the present invention, there is provided a liquid-impermeable cover sheet, a liquid-permeable top sheet joined to the cover sheet, and an absorber disposed between the cover sheet and the top sheet. An absorbent article in which a marker and a pattern are printed on the cover sheet, wherein the position of the marker along the longitudinal direction of the cover sheet is within the pattern forming region along the longitudinal direction of the cover sheet. It is characterized by that.

  In the absorbent article according to the second aspect of the present invention, the marker has a specific hue, and the pattern at the position in the longitudinal direction of the cover sheet corresponding to the position of the marker along the longitudinal direction of the cover sheet is the hue of the marker. It may have a different hue. Alternatively, the marker is formed using a paint that emits fluorescence excited by light of a specific wavelength, and the pattern in the longitudinal direction of the cover sheet corresponding to the position of the marker along the longitudinal direction of the cover sheet has a specific wavelength It is effective not to include a paint that emits fluorescence excited by light.

  The cover sheet includes an outer sheet, an inner sheet joined to the outer sheet, and a back sheet joined to the inner sheet and the top sheet joined via the absorber, and the marker and the design are the outer sheets. Alternatively, it may be printed on either the inner sheet or the back sheet. In this case, the absorbent article is a pants-type disposable diaper, and a marker and a pattern are printed on the outer side surface of the back sheet in contact with the inner side surface of the inner sheet, and at least the pattern is visible through the inner sheet and the outer sheet. Good.

  Alternatively, the cover sheet may include a patch sheet on which a marker and a pattern are printed, and the patch sheet may be integrally bonded to the cover sheet. In this case, the absorbent article may be a deployable disposable diaper, and the patch sheet may be a front patch sheet joined to one end side in the longitudinal direction of the outer surface of the cover sheet.

  In the third aspect of the present invention, the position of the marker formed together with the pattern at regular intervals on the continuous body of the back sheet or the continuous body of the patch sheet in the absorbent article of the first or second aspect of the present invention. The apparatus includes an optically detecting sensor and a light source that irradiates illumination light toward a detection area of the marker by the sensor, and cuts the continuous sheet at regular intervals during the travel. The marker has a specific hue, and the design is formed in a continuous body of the sheet so that a part thereof overlaps a detection area of the marker by the sensor, and the sensor has a specific hue of the marker. Is a color sensor that detects the proportion of light of a specific wavelength corresponding to the color of the marker overlapping the detection area of the marker by the sensor. It is characterized in that it has a composed color.

  According to a fourth aspect of the present invention, there is provided a backsheet continuum or a patch sheet continuum in the absorbent article according to the first or second aspect of the present invention. A device for optically detecting the sheet and a light source for irradiating illumination light toward the detection area of the marker by the sensor, and cutting the continuous body of the sheet at regular intervals during the travel. The marker includes a paint that emits fluorescence excited by light of a specific wavelength, and the pattern is formed on the continuous body of the sheet so that a part thereof overlaps a detection region of the marker by the sensor. The illumination light from the light source includes light of the specific wavelength and the sensor detects fluorescence from the marker, and the sensor detects the marker. It is characterized in that a part of the pattern overlapping the detection area of over does not include a paint that emits fluorescence excited by light of the specific wavelength.

  According to the absorbent article of the 1st or 2nd form of this invention, since the position of the marker along the width direction or longitudinal direction of a cover sheet exists in the formation area of the pattern along the width direction or longitudinal direction of a cover sheet. The pattern can be formed over the entire area of the cover sheet. As a result, the degree of freedom of the pattern formed on the cover sheet can be greatly increased as compared with the conventional one.

  According to the sheet cutting apparatus of the third aspect of the present invention, since the color sensor that detects the ratio of the light of the specific wavelength corresponding to the specific hue of the marker is provided, the pattern overlapping the detection region of the marker by the sensor As long as the hue of the marker has a hue different from that of the marker, the position of the marker can be accurately detected. As a result, even if a part of the design is formed on the continuous body of the sheet so as to overlap with the detection area of the marker by the color sensor, the continuous body of the sheet can be accurately cut as in the conventional case.

  According to the apparatus of the 4th form of this invention, since the marker contains the paint which emits the fluorescence excited by the light of a specific wavelength, it can make a marker unrecognizable under visible light. For this reason, as long as the design does not include paint that emits fluorescence excited by light of a specific wavelength, it is possible to form a marker on any position of the design, which can significantly increase the degree of freedom of the design. Become.

It is a three-dimensional projection figure showing the external appearance of one Embodiment which applied the absorbent article by this invention to the underpants type disposable diaper. It is the stereographic projection figure which expand | deploys the diaper shown in FIG. 1, and represents in a decomposition | disassembly state. It is a manufacturing block diagram which represents typically the manufacturing procedure of the diaper shown in FIG. It is a partially broken figure which shows the state in the middle of manufacture of the diaper shown in FIG. It is a front view showing the external appearance of the continuous body of the back seat | sheet used for the diaper shown in FIG. It is a conceptual diagram which represents typically a part of manufacturing line of the diaper shown in FIG. It is a three-dimensional projection figure showing the external appearance of other one Embodiment which applied the absorbent article by this invention to the underpants type disposable diaper. It is the three-dimensional projection figure which expand | deploys the diaper shown in FIG. 7, and represents in a decomposition | disassembly state. It is a partially broken figure which shows the state in the middle of manufacture of the diaper shown in FIG. It is a three-dimensional projection figure showing the appearance of one embodiment which applied the absorptive article by the present invention to a deployment type disposable diaper in the deployment state. It is a front view showing the external appearance of the continuous body of the front patch sheet in embodiment shown in FIG.

  Embodiments of the present invention will be described in detail with reference to FIGS. However, the present invention is not limited to such an embodiment, and any other technique belonging to the spirit of the present invention, for example, a case where a continuous body of sheets in which a pattern and a marker are formed at regular intervals is cut, The present invention can be applied to any article using the.

  The external appearance of the pants-type disposable diaper in the first embodiment is shown in FIG. 1, and its structure is developed and shown in an exploded state in FIG. A pants-type disposable diaper (hereinafter may be simply referred to as a diaper) 10 in the present embodiment is formed by sequentially stacking a cover sheet 11, an absorber 12, and a top sheet 13 that touches the wearer's skin in order from the outside. It is joined. Further, the closing part 14 is formed by joining the left and right side edges of the front body region 10F and the back body region (not shown) to each other. Thereby, the waist periphery opening part 15 corresponding to a wearer's waist part and the left-right paired leg periphery opening part 16 corresponding to the crotch part of both legs are defined.

  The cover sheet 11 in this embodiment includes an outer outer sheet 11o, an inner sheet 11i bonded to the outer sheet 11o, and a back sheet 17 bonded to the inner sheet 11i. The previous absorbent body 12 is disposed between the back sheet 17 and the top sheet 13, and the top sheet 13 is joined to the back sheet 17 through the absorbent body 12. Between the outer sheet 11o and the inner sheet 11i formed of a thin non-woven fabric in order to obtain a good touch, a rubber 18 for forming gathers around the legs, and a rubber 19 for forming gathers around the waist Are joined in an extended state.

  In the front body region 10F and the back body region on the outer side surface of the liquid-impermeable back sheet 17 that is superimposed on the inner surface of the inner sheet 11i, a pair of symbols A is formed over almost the entire width direction. ing. In this case, the symbol A can be recognized from the outside through the inner sheet 11i and the outer sheet 11o. In the front body region 10F on the outer side surface of the backsheet 17, the backsheet continuous body 17w (see FIG. 5) is cut along the cutting line 20 (two-dot chain line in FIG. 5) during manufacturing. The reference marker 21 is also formed at one end in the width direction. In the present embodiment, the position of the marker 21 along the width direction of the back sheet 17 (the left-right direction in FIG. 1) is within the formation area of the pattern A along the width direction of the back sheet 17. That is, when the formation region of the marker 21 is extended in the longitudinal direction of the back sheet 17 (see the hatched portion in FIG. 5), it overlaps with a part of the pattern A. It is also possible to set so that the position of the marker 21 along the longitudinal direction of the backsheet 17 is within the pattern A formation region along the longitudinal direction of the backsheet 17.

  The marker 21 in the present embodiment has a specific hue, and the design A at the position in the width direction of the backsheet 17 corresponding to the position of the marker 21 along the width direction of the backsheet 17 is different from the hue of the marker 21. have. Note that the difference in hue between the marker 21 and the pattern A in this case only needs to be discriminable by the color sensor 22 (see FIG. 6) that optically detects the proportion of light of a plurality of specific wavelengths. Therefore, even if the hue is relatively similar, there is no problem. In this case, the reflected light is generally detected by irradiating the traveling back sheet 17 to be detected with illumination light using natural light, a general white light source, or the like.

  When printing the pattern A in the detection area of the marker 21, it is only necessary to make the hue of the pattern A printed in the detection area of the marker 21 different from the hue of the marker 21. In other words, as long as this condition is satisfied, the marker 21 can be formed at an arbitrary position such as the center in the width direction or the center in the longitudinal direction of the back sheet 17. Moreover, the design A can be formed in the whole area | region of the back seat | sheet 17, and the freedom degree of the design of the design A can be raised rather than the conventional one.

  If a part of the pattern A located in the detection area of the marker 21 has a size that cannot be recognized by the color sensor 22, that is, a size and shape that cannot be detected, the hue of the pattern A in this area is changed to that of the marker 21. There is no problem even if it is the same as the hue.

Absorber 12, mat-like SAP in fluff pulp constituting the: dispersing the (S uper A bsorbent P olymer superabsorbent polymer), it is common that wrapped this in tissue. The absorber 12 is arranged so as to extend from the front body region 10F to the back body region through the crotch region 10C. Normally, the absorbent body 12 has an outline shape like an hourglass in which the crotch region 10C located at the center in the longitudinal direction is narrowed.

  Liquid-impermeable side sheets 13s are joined to the left and right side edges of the liquid-permeable top sheet 13, and rubber 23 for forming a three-dimensional gather is formed on the inner edges of the left and right side sheets 13s. Joined in an extended state.

  The manufacturing procedure of the diaper 10 will be briefly described with reference to FIGS. 3 to 6. Regarding the manufacturing method of the diaper 10 having such a configuration, for example, Japanese Unexamined Patent Publication No. 2001-346825 and Japanese Unexamined Patent Application Publication No. 2005-80827. And so on. Here, FIG. 3 is a block diagram schematically showing the manufacturing procedure of the diaper 10, FIG. 4 schematically showing a part of the manufacturing process, and FIG. 5 showing the outside of the backsheet continuum before cutting. FIG. 6 schematically shows a part of this production line.

  First, a pair of left and right rubbers 18 for forming gathers around the legs are joined to each other symmetrically in an elongated state in a wavy shape at the center of the outer sheet continuum 11ow, and an inner sheet continuum 11iw is further formed thereon. Superimpose and join. In the present embodiment, a pair of left and right rubbers 18 are cut at portions located in the crotch region 10C of the diaper 10 so that the rubber 18 is not interposed in the crotch region 10C.

  On the other hand, a backsheet continuum 17w on which a pair of front and rear symbols A of the diaper 10 is printed in advance along the longitudinal direction at a predetermined interval is fed from the stock yard 24 toward the cutter device 25. On the way, based on the position information of the marker 21 detected by the color sensor 22, the longitudinal direction of the absorbent body 12 on the backsheet continuous body 17w is at regular intervals along the longitudinal direction of the backsheet continuous body 17w. Arrange them in an array. In this case, the absorbent body 12 covers the pair of symbols A arranged along the longitudinal direction of the backsheet continuous body 17w. Furthermore, the continuous body 13w of a top sheet is piled up on these, and these are joined. In addition, a rubber continuous body 23w for forming a three-dimensional gather is joined in an extended state along opposite inner edge portions of the pair of left and right side sheet continuous bodies 13sw. And these are piled up on the continuous body 13w of a top sheet, and these width direction outer side edge parts are joined to the continuous body 13w of a top sheet. FIG. 5 illustrates a backsheet continuum 17w on which a single pattern A is printed. However, different types of patterns including the background and the like (for example, five types of patterns A to E) are sequentially arranged at regular intervals. It may be a continuous backsheet printed repeatedly. Moreover, these printing surfaces can also be set to the inner surface of the continuous body 17w on which the absorber 12 is superposed unless the backsheet 17 is opaque.

  Next, the back sheet continuous body 17w to which the absorbent body 12, the top sheet continuous body 13w, and the side sheet continuous body 13sw are joined is cut by the cutter device 25 along the longitudinal direction thereof. Then, while maintaining the stretched state of the three-dimensional gather rubber 23, the rubber 23 is rotated by 90 degrees and joined onto the continuums 11ow and 11iw of the outer and inner sheets at regular intervals. That is, the cut pieces of the top sheet 13, the side sheet 13 s, and the back sheet 17 including the absorbent body 12 so that the absorbent body 12 crosses the crotch region 10 </ b> C where the pair of left and right rubbers 18 for forming the leg gathers are closest. Are joined to a continuous body 11ow, 11iw of outer and inner sheets. In this state, it should be noted that the longitudinal direction of the absorbent body 12 is arranged along the width direction of the continuous body 11ow, 11iw of the outer and inner sheets. Next, a pair of left and right rubber continuums 19w for forming gathers around the waist along the left and right ends of the outer sheet continuum 11ow are joined to the left and right ends of the outer sheet continuum 11ow in an expanded state. . Then, a pair of left and right rubber continuums 19w for forming the waist gathers by folding back the left and right end portions of the outer sheet continuous body 11ow is folded back and covered with the left and right side ends of the outer sheet continuous body 11ow.

  After that, an elliptical hole 16h is formed in the laminated outer and inner sheet continuums 11ow, 11iw, the back sheet 17, and the top sheet 13 that are interposed between the adjacent crotch regions 10C serving as the leg openings 16. cut out. Next, the outer and inner sheet continuums 11ow and 11iw are folded in half at the center in the width direction so that the left and right end edges overlap each other. Furthermore, the diaper 10 as shown in FIG. 1 can be obtained by joining the overlapping portions of the topsheet 13 that form the closing portion 14 so as to pass through the previous hole 16h and cutting the central portion. .

  The cutting position of the preceding backsheet continuous body 17w is controlled based on the position information of the marker 21 of the backsheet continuous body 17w detected using the previous color sensor 22. More specifically, the rotation speed of the speed adjusting roller 26 is adjusted so that the detection cycle of the marker 21 by the color sensor 22 and the cutting cycle of the backsheet continuous body 17w by the cutter device 25 are synchronized. Thereby, the extension allowance of the continuous body 17w of the back sheet | seat currently hold | maintained in the expansion | extension state between the cutter apparatus 25 and the speed adjustment roller 26 changes, and it becomes possible to change the cutting position. Further, the change in the tension of the backsheet continuum 17w between the stock yard 24 and the speed adjustment roller 26 caused by the change in the rotational speed of the speed adjustment roller 26 is caused by the dancer roll 27 disposed therebetween. Detected by displacement. Based on the detection result, the amount of the backsheet continuum 17w fed from the stockyard 24 is set so that the tension of the backsheet continuum 17w between the stockyard 24 and the speed adjusting roller 26 is constant. Adjusted.

  In FIG. 5, the hatched area is the detection area of the color sensor 22 for the backsheet continuous body 17w conveyed in the vertical direction, and the marker 21 and a part of the pattern A overlap each other. It will be understood that That is, the hue of the marker 21 may be set so that the hue of the marker 21 is different from the hue of the pattern A passing through the detection area of the color sensor 22. The color sensor 22 detects the proportion of light having a wavelength of 680 nm corresponding to R (red), 530 nm corresponding to G (green), and 450 nm corresponding to B (blue) based on the reflected light from the measurement object. To do. Therefore, as long as the RGB ratio of the pattern A in the detection area is different from the RGB ratio of the marker 21, even if a part of the pattern A exists in the detection area of the color sensor 22, an error due to this. Detection can be avoided.

  Thus, if attention is paid to the hue with respect to the marker 21, the pattern A can be formed at an arbitrary position in the entire region of the back sheet 17, and the degree of freedom of design of the pattern A can be increased as compared with the conventional one. it can.

  In the embodiment described above, the marker 21 and the pattern A are printed on the back sheet 17, but the marker 21 and the pattern A can also be printed on the outer sheet 11o and the inner sheet 11i. In this case, the diaper The pattern A can be formed in 10 wider ranges. Such other embodiments of the present invention will be described with reference to FIGS. 7 to 9, but elements having the same functions as those of the previous embodiment are denoted by the same reference numerals, and redundant descriptions are omitted. To do.

  The external appearance of the pants-type disposable diaper in this embodiment is shown in FIG. 7, the structure is expanded and shown in FIG. 8 in a disassembled state, and a part of the manufacturing process is schematically shown in FIG. That is, the diaper 10 in the present embodiment is obtained by printing the pattern A and the marker 21 on the inner sheet 11i. However, it is naturally possible to print the pattern A and the marker 21 on the outer sheet 11o. The marker 21 serves as a reference when the hole 16h and the closing portion 14 are formed and the outer and inner sheet continuous bodies 11ow and 11iw are cut. The detection area of the color sensor (not shown) with respect to the marker 21 is along the waist opening 15 of the diaper 10, and a part of the pattern A is printed on the detection area.

  In addition, the structure of the diaper 10 which this invention makes object, and its manufacturing method are not necessarily limited to what was mentioned above, The structure of the absorbent article prescribed | regulated to Claims 1-10 of a claim Any structure and manufacturing method may be used as long as it is a diaper including For example, the present invention can be applied to an unfolded disposable diaper.

  An embodiment in which such an absorbent article according to the present invention is applied to a deployable disposable diaper having a front patch will be described with reference to FIGS. 10 and 11. In addition, since the detailed structure of unfoldable disposable diaper itself is already well-known, only the part relevant to this invention is demonstrated, and the same code | symbol is described to the element of the same function as previous embodiment.

  FIG. 10 shows the appearance of the unfolded disposable diaper according to the present embodiment in an unfolded state, and FIG. 11 shows the appearance of a continuum of front patch sheets used for this. That is, the cover sheet 11 of the unfoldable disposable diaper 10 in the present embodiment has a pair of front and rear side flap portions 28f and 28r extending outward from both side edges in the width direction. Between these side flap parts 28f and 28r, a pair of notch parts 16c, which become leg-hole openings when worn, are formed.

  A pair of left and right legs that can be connected to the side flap portions 28f of the front body region 10F by overlapping them on both side edges in the width direction of the side flap portions 28r on the back body side, and can form leg openings by the notches 16c. Fastening tape 29 is attached. The fastening tape 29 is bonded to the front patch sheet 30 bonded on the cover sheet 11 in the front body region 10F so as to be repeatedly peelable.

  In the front patch sheet 30 in the present embodiment, the pattern A is formed over almost the entire region in the width direction. Further, at the time of manufacturing, the front patch sheet 30 has a continuous body 30w (see FIG. 11) cut along a cutting line (two-dot chain line) 31 at both ends in the width direction of the front patch sheet 30. A reference marker 21 is also formed. The front patch sheet continuum 30w is conveyed in the vertical direction in FIG. 11 orthogonal to the cutting line 31, and is cut along the cutting line 31 during the conveyance. It joins to the predetermined position used as an area | region. In the present embodiment, the position of the marker 21 along the width direction of the front patch sheet 30 (the left-right direction in FIG. 10) is within the formation area of the pattern A along the width direction of the front patch sheet 30. Further, the position of the marker 21 along the longitudinal direction of the front patch sheet 30 is also within the formation area of the pattern A along the longitudinal direction of the front patch sheet 30.

  The marker 21 in the present embodiment is formed using a paint that emits fluorescence excited by invisible light of a specific wavelength such as ultraviolet rays, whereas the pattern A uses ordinary pigment-based or dye-based ink. It is formed with paint. Therefore, the sensor 22 used in the present invention only needs to be able to detect fluorescence. In this case, the light source for obtaining the reflected light (fluorescence) detected by the sensor 22 may be any light source that can irradiate the continuous body 30w of the front patch sheet with specific invisible light such as ultraviolet rays.

  Thus, when the marker 21 is formed using a paint that emits fluorescence excited by light of a specific wavelength, the marker 21 cannot be visually recognized under natural light. Can be formed freely. That is, an arbitrary symbol A can be freely designed on the front patch sheet 30 without considering the printing position and shape of the marker 21 at all. In other words, the marker 21 is printed by being overlapped at an arbitrary position of the pattern A (for example, the central portion of the front patch sheet 30) or an arbitrary shape (for example, a line parallel to the cutting line 31 crossing the front patch sheet 30). For example). Note that this also applies to the pattern A formed on the backsheet 17 of the previous embodiment. In this case, the pattern A at the position in the width direction of the front patch sheet 30 corresponding to the position of the marker 21 along the width direction of the front patch sheet 30 emits fluorescence excited by light of a specific wavelength, that is, the marker 21. It is necessary not to contain the same paint.

  In addition, the patch sheet on which the same pattern and marker as the front patch sheet 30 described above are printed is cut from the continuous body, and is previously attached and bonded to the cover sheet 11 of the diaper 10 in the previous embodiment. Are within the scope of the present invention. In addition, various materials such as a nonwoven fabric and a film can be used as the patch sheet. When this patch sheet is joined to the cover sheet 11 of the diaper 10, it is joined not only to the outer surface of the outer sheet 11 o but also to a portion that can be seen through the outer sheet 11 o, for example, the outer surface of the back sheet 17 or the outer surface of the inner sheet 11 i. Is also possible.

  As described above, the present invention should be construed only from the matters described in the scope of the claims, and in the above-described embodiments, the matters described in all the changes and modifications included in the concept of the present invention are described. Other than possible. That is, all matters in the above-described embodiment are not intended to limit the present invention, and include any configuration not directly related to the present invention. To get.

A design 10 disposable diaper 10F front body region 10R back body region 10C inseam region 11 cover sheet 11o outer sheet 11i inner sheet 11w continuous body of cover sheet 11ow continuous body of outer sheet 11iw continuous body of inner sheet 12 absorbent body 13 top sheet 13w Top sheet continuous body 13s Side sheet 13sw Side sheet continuous body 14 Closing part 15 Waist opening part 16 Leg opening part 16h Hole 16c Notch part 17 Back sheet 17w Back sheet continuous part 18, 19 Rubber 19w Rubber Continuous body 20 Cutting line 21 Marker 22 Color sensor 23 Rubber 23w Rubber continuous body 24 Stockyard 25 Cutter device 26 Speed adjustment roller 27 Dancer roller 28f, 28r Side flap 29 the fastening tape 30 continuous body 31 cutting line of the front patch sheet 30w front patch sheet

Claims (12)

A liquid-impermeable cover sheet, a liquid-permeable top sheet joined to the cover sheet, and an absorber disposed between the cover sheet and the top sheet, the marker and a pattern on the cover sheet Is an absorbent article printed,
The absorbent article, wherein the position of the marker along the width direction of the cover sheet is within the pattern formation region along the width direction of the cover sheet.   The marker has a specific hue, and the design at the position in the width direction of the cover sheet corresponding to the position of the marker along the width direction of the cover sheet has a hue different from the hue of the marker. The absorbent article according to claim 1.   The symbol is formed using a paint that emits fluorescence excited by light of a specific wavelength, and the pattern is in a position in the width direction of the cover sheet corresponding to the position of the marker along the width direction of the cover sheet The absorbent article according to claim 1, which does not include a paint that emits fluorescence excited by light of the specific wavelength. A liquid-impermeable cover sheet, a liquid-permeable top sheet joined to the cover sheet, and an absorber disposed between the cover sheet and the top sheet, the marker and a pattern on the cover sheet Is an absorbent article printed,
The absorbent article characterized in that the position of the marker along the longitudinal direction of the cover sheet is within the pattern formation region along the longitudinal direction of the cover sheet.   The marker has a specific hue, and the design at the position in the longitudinal direction of the cover sheet corresponding to the position of the marker along the longitudinal direction of the cover sheet has a hue different from the hue of the marker. The absorbent article according to claim 4.   The pattern is formed using a paint that emits fluorescence that is excited by light of a specific wavelength, and the pattern is in the longitudinal position of the cover sheet corresponding to the position of the marker along the longitudinal direction of the cover sheet The absorbent article according to claim 4, which does not include a paint that emits fluorescence excited by light of the specific wavelength.   The cover sheet includes an outer sheet, an inner sheet joined to the outer sheet, a back sheet joined to the inner sheet and the top sheet joined via the absorber, and the marker and The absorbent article according to any one of claims 1 to 6, wherein a pattern is printed on any one of the outer sheet, the inner sheet, and the back sheet.   The said cover sheet | seat contains the patch sheet | seat with which the said marker and the pattern were printed, This patch sheet | seat is integrally joined with respect to the said cover sheet | seat, The claim 1 or Claim 2 characterized by the above-mentioned. Item 6. The absorbent article according to item 4 or claim 5.   The said cover sheet | seat contains the patch sheet | seat with which the said marker and the pattern were printed, This patch sheet | seat is integrally joined with respect to the said cover sheet | seat. Absorbent articles.   The absorbent article according to claim 8, wherein the absorbent article is a deployable disposable diaper, and the patch sheet is a front patch sheet joined to one end side in the longitudinal direction of the outer surface of the cover sheet. . The backsheet continuum in the absorbent article according to claim 1 or claim 2 or claim 4 or claim 5 or the patch sheet continuum in the absorbent article according to claim 8 at regular intervals. A sensor for optically detecting the position of the marker formed together with the pattern, and a light source for irradiating illumination light toward the detection area of the marker by the sensor, and the continuous body of the sheet during the traveling A device that cuts at regular intervals,
The marker has a specific hue, and the design is formed on the continuous body of the sheet so that a part thereof overlaps a detection area of the marker by the sensor,
The sensor is a color sensor that detects a proportion of light of a specific wavelength corresponding to a specific hue of the marker;
The apparatus according to claim 1, wherein the hue of the design overlapping the detection area of the marker by the sensor has a hue different from that of the marker. The position of the marker formed with the design at regular intervals on the continuum of the back sheet in the absorbent article according to claim 3 or claim 6 or the continuum of the patch sheet in the absorbent article according to claim 9. A device for optically detecting the sheet and a light source for irradiating illumination light toward the detection area of the marker by the sensor, and cutting the continuous body of the sheet at regular intervals during the travel. There,
The marker includes a paint that emits fluorescence excited by light of a specific wavelength, and the pattern is formed on the continuous body of the sheet so that a part thereof overlaps a detection region of the marker by the sensor,
Illumination light from the light source includes light of the specific wavelength, and the sensor detects fluorescence from the marker,
A part of the design that overlaps the detection area of the marker by the sensor does not include a paint that emits fluorescence that is excited by light of the specific wavelength.

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