JP2005287662A - Absorbent article and and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article manufactured at a low cost by simplifying the manufacturing process of the absorbent article and to provide its manufacturing method. <P>SOLUTION: This absorbent article is provided with an article body formed of a top sheet, a back sheet and an absorbent body interposed between the sheets, and three-dimensional gathers projecting to the use face sides in the both sides of the article body; and the three-dimensional gathers are formed of continuous bodies from the back sheet. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an absorbent article such as a sanitary napkin or a disposable paper diaper and a method for producing the same, and more particularly to an absorbent article having a high function even if the production process is simplified and a method for producing the absorbent article.

  Conventionally, various types of absorbent articles 100 such as disposable disposable diapers are generally known as sanitary napkins. However, there is no great difference in the basic configuration, for example, as shown in Patent Document 1, FIG. FIG. 16 is a perspective view of the absorbent article (sanitary napkin) 100, and FIG. 16 is a sectional view taken along line YY of FIG. , 102, an article 103 is formed by interposing an absorbent body 103 therebetween. In order to prevent body fluids such as menstrual blood and urine from leaking out of the leg-parts in particular, a three-dimensional gather 105 is provided so as to protrude on the use surface side of both sides of the article body 104.

  The method of manufacturing the absorbent article 100 as described above includes the steps of disposing and bonding the absorber 103 on the back sheet 102, and disposing and bonding the top sheet 101 on the absorber 103. A process of covering the whole of the absorbent body 103 except for the central portion in the width direction with the back sheet 102, and a gather manufactured by a separate manufacturing apparatus on both sides of the back sheet 102, that is, on both sides of the article main body 104. The process of adhering 105 is comprised. Therefore, another manufacturing facility for manufacturing the gather 105 is required, and a line for transporting the gather 105 to the bonding line for bonding the article main body 104 and the gather 105 is also required. There was a problem that the manufacturing cost was high.

  In addition, the article body 104 and the gather 105 are bonded by bonding each component with an adhesive such as hot melt. Generally, the adhesive force when bonding each component is determined by each component. This is largely due to the so-called anchor effect, in which an adhesive such as hot melt penetrates into the fine irregularities on the surface of the element sheet.

However, particularly when the back sheet 102 is formed of a film, the film has less uneven portions than the non-woven fabric. Therefore, when the back sheet 102 and the gather 105 are bonded, the above-described anchor effect can be sufficiently obtained. However, there was a drawback that the adhesive strength was weak. Therefore, after the sheets of the respective constituent elements are bonded together, the back sheet 102 and the gather 105 are bonded by pressing with a press roll, or the hot melt property of solidifying when cooled in order to bond more firmly is utilized. Additional equipment such as installing cooling equipment on this press roll was necessary. Accordingly, there is a problem that costs for operating such facilities are required, and a place for installing these facilities is also required, which further increases the manufacturing cost of the absorbent article.
JP 7-323044 A

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an absorbent article that can be manufactured at a lower cost by simplifying the manufacturing process of the absorbent article.

  An object of the present invention is to provide an absorption comprising a top sheet, a back sheet, and an absorbent body interposed between the two sheets so that an article body is formed and a three-dimensional gather projecting toward the use surface side of the article body. This is achieved by providing an absorbent article, wherein the three-dimensional gather is formed of a continuous body from the back sheet.

  Moreover, the said objective of this invention is achieved effectively by providing the absorbent article characterized by the film being provided between the said back seat | sheet and the said absorber.

  Moreover, the said objective of this invention is achieved effectively by providing the absorbent article characterized by the said film being extended to the side edge part of the said absorber.

  Moreover, the said objective of this invention is achieved effectively by providing the absorbent article characterized by the whole except the width direction center part of the said absorber being coat | covered with the said film.

  In addition, the above object of the present invention is the absorptivity characterized in that both side portions of the film extend to the upper surface of both side portions of the top sheet up to a portion excluding the central portion in the width direction of the top sheet. This is effectively achieved by providing the article.

  Moreover, the said objective of this invention is achieved more effectively by providing the absorbent article characterized by the standing base point of the said three-dimensional gather being near the both sides of the said film.

  Moreover, the said objective of this invention is effectively achieved by providing the absorbent article characterized by the said film extending to the standing part of the said solid gather.

  Furthermore, the object of the present invention is more effective by providing an absorbent article in which the back sheet is formed with an opening on the outer surface side of the central portion in the width direction of the article body. Is achieved.

An object of the present invention is to provide an absorption comprising a top sheet, a back sheet, and an absorbent body interposed between the two sheets so that an article body is formed and a three-dimensional gather projecting toward the use surface side of the article body. A method for producing a functional article comprising:
Arranging and bonding an elastic stretch member to each of both ends of the backsheet; and
Disposing and adhering the absorber on the backsheet; and
Arranging and bonding the top sheet on the upper surface of the absorber; and
Folding each side of the backsheet along the absorber;
A step of forming a three-dimensional gather by folding the back sheet at both sides in the width direction of the upper surface of the article body;
This is achieved by providing a method of manufacturing an absorbent article characterized by comprising:

  In addition, the object of the present invention is effectively achieved by providing a method for manufacturing an absorbent article, which includes a step of disposing and bonding a film between the back sheet and the absorber. To be achieved.

  In addition, the object of the present invention is to provide a method for producing an absorbent article, comprising the step of folding each side of the film so as to be along the side edge of the absorber. Effectively achieved.

  Furthermore, the object of the present invention is further improved by providing a method for producing an absorbent article, comprising the step of folding the film at both sides in the width direction of the upper surface of the article body. Is achieved.

An object of the present invention is to provide an absorption comprising a top sheet, a back sheet, and an absorbent body interposed between the two sheets so that an article body is formed and a three-dimensional gather projecting toward the use surface side of the article body. A method for producing a functional article comprising:
Dividing the backsheet into two parts and arranging them in parallel;
Arranging and bonding a film on each inner end of the backsheet arranged in parallel; and
Arranging and bonding an elastic stretch member to each of both ends of the backsheet; and
Disposing and adhering the absorber on the film; and
Arranging and bonding the top sheet on the upper surface of the absorber; and
Folding each side of the backsheet inward,
Folding the backsheet so as to cover the absorber;
A step of forming the three-dimensional gather by folding the back sheet outward at both sides in the width direction of the upper surface of the napkin body;
This is achieved by providing a method of manufacturing an absorbent article characterized by comprising:

  In addition, the object of the present invention is effective by providing a method for manufacturing an absorbent article, comprising the step of folding each side of the film so as to be along the side edge of the absorber. Is achieved.

  Furthermore, the object of the present invention is more effective by providing a method for manufacturing an absorbent article, comprising the step of folding the film at both sides in the width direction of the upper surface of the article body. To be achieved.

  In the absorbent article according to the present invention, since the three-dimensional gather is formed by a continuous body from the back sheet, the step of bonding the absorbent article main body and the three-dimensional gather becomes unnecessary, and the manufacturing process of the absorbent article is simplified. can do. Moreover, since the manufacturing apparatus for manufacturing a three-dimensional gather becomes unnecessary, an absorbent article can be manufactured at lower cost.

  Hereinafter, the absorbent article and the manufacturing method thereof according to the present invention will be described in detail with reference to the drawings, taking as an example the case where the absorbent article is a sanitary napkin. In addition, this invention is not necessarily limited to the following embodiment, and it cannot be overemphasized that the structure can be variously changed in the range which does not deviate from a claim.

  FIG. 1 is a perspective view of a sanitary napkin (hereinafter referred to as “the present napkin”) according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line XX of FIG. In addition, this napkin is substantially the same as the conventional absorbent article described above, except for the fact that the three-dimensional gather is formed by a continuous body from the back sheet. For this reason, in this napkin, about the component which is common with the conventional absorbent article, the same code | symbol of 10 series is attached | subjected and demonstrated.

  As shown in FIG. 2, the napkin 10 is similar to the conventional absorbent article 100 described above, in order from the side in contact with the wearer's body (use surface side), the top sheet 11, the absorber 13, A napkin body 14 is formed by the back sheet 12. Further, in order to prevent body fluid such as menstrual blood (hereinafter referred to as “body fluid”) from leaking out from the leg periphery, it is formed by a continuous body from the back sheet 12 on both longitudinal sides of the napkin body 14. Further, a three-dimensional gather 15 is provided, and an adhesive material 16 is attached to the outer surface (shorts facing surface) of the napkin main body 14 for adhering to shorts and the like when worn.

  The top sheet 11 is a sheet that allows body fluid to permeate through the absorbent body 13 and has a touch close to an undergarment. The top sheet 11 has a fine texture and high fiber density, such as a porous or non-porous nonwoven fabric or a porous plastic sheet. Is preferably used, but is not necessarily limited to these materials. Moreover, natural fiber, synthetic fiber, regenerated fiber, etc. can be used as a raw material fiber which comprises a nonwoven fabric. Examples of natural fibers include cotton, cellulose (wood pulp), wool, silk and the like. Synthetic fibers include polypropylene (PP), polyethylene (PE), nylon, polyester (PET, etc.), acrylic, etc., and PE / PP mixed non-woven fabric, PE / PET mixed non-woven fabric, etc., as appropriate. Bicomponent fibers (mixed fibers) can also be used. Furthermore, rayon or cupra can be used as the regenerated fiber.

  As a method for producing a nonwoven fabric from the above-described fiber material, various known processing methods such as a chemical bond method, a thermal bond method, a spun lace method, a spun bond method, a melt blown method, a needle punch method, and the like can be used as appropriate. . Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. In addition, when many through-holes are formed in the top sheet 11, a bodily fluid will be rapidly absorbed by the absorber 13, and it will be excellent in dry touch property.

  The absorbent body 13 may be any body that can absorb and retain body fluids. Usually, the absorbent body 13 is mainly made of cotton-like pulp and mixed with an absorbent polymer. Examples of the cotton-like pulp include cellulose fibers such as chemical pulp and dissolved pulp obtained from wood, and artificial cellulose fibers such as rayon and acetate. Moreover, the absorptive polymer is mixed in the pulp which comprises the absorber 13, for example as granular powder. In addition, although the absorber 13 of this napkin 10 is not illustrated, the whole may be covered with a water-absorbing paper such as a tissue. By covering with the water-absorbing paper such as this, the body fluid is quickly absorbed. The body fluid can be prevented from returning to the top sheet 11 by being diffused into the top sheet 11.

  The back sheet 12 is formed of a nonwoven fabric (sheet member). This non-woven fabric is made of polypropylene (PP), polyethylene (PE), nylon, polyester (PET, etc.), acrylic, etc., and PE / PP mixed non-woven fabric, PE / PET mixed non-woven fabric, etc. Fiber) or the like, but can be manufactured by the same manufacturing method as the top sheet 11. However, since the back sheet 12 is preferably liquid-impermeable, it is preferably formed of a material having high hydrophobicity or water repellency. In addition, the nonwoven fabric is processed to increase hydrophobicity or water repellency.

  The backsheet 12 may be a laminated nonwoven fabric of a nonwoven fabric and a film. As such a laminated nonwoven fabric, for example, a composite material of a nonwoven fabric and a thermoplastic resin film is preferably used. In this case, the non-woven fabric is preferably arranged so as to be positioned on the non-skin contact surface of the napkin 10, that is, to form an outermost layer in contact with the wearer.

  As shown in FIG. 2, the three-dimensional gather 15 is formed as a continuous body from the back sheet 12 by folding the left and right sides of the back sheet 12 to the top sheet 11 side. Accordingly, the material fiber of the three-dimensional gather 15 is the same as that of the back sheet 12 described above. The three-dimensional gather 15 has an elastic expansion / contraction member 17 therein, and the elastic expansion / contraction member 17 is made of a thread-like elastic material made of styrene rubber, olefin rubber, urethane rubber, polyurethane, polystyrene, or the like. Rubber is preferably used.

  In addition, a hot melt adhesive is generally used as the adhesive 16, but the present invention is not limited to such a hot melt adhesive, and various other known adhesives can be used.

  The absorbent article 10 formed using the above-described forming material uses a non-woven fabric as a forming material for the back sheet 12 that forms the outermost layer in contact with the wearer. An impression can be given to the wearer that is likely to be reduced or cool.

  In the present napkin 10 configured as described above, since the three-dimensional gather 15 is formed of a continuous body from the back sheet 12, a step of bonding the napkin main body 14 and the three-dimensional gather 15 as in the prior art becomes unnecessary. Therefore, the manufacturing process of the absorbent article 10 can be simplified. Moreover, since the manufacturing apparatus etc. for manufacturing the three-dimensional gather 15 become unnecessary, the absorbent article 10 can be manufactured at lower cost.

  Next, a sanitary napkin according to a second embodiment of the present invention will be described. The napkin according to the present embodiment is the same as the physiological component according to the first embodiment described above except for the fact that a film is provided between the shorts facing surface side of the absorbent body, that is, the back sheet and the absorbent body. It is the same as the napkin for use. Therefore, in the napkin according to the present embodiment, components that are the same as those of the napkin 10 according to the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  That is, the napkin 10 ′ according to the present embodiment is, as shown in the cross-sectional view in the width direction of the napkin 10 ′ in FIG. 3, in order from the use surface side, the top sheet 11, the absorber 13, the film 18, A napkin body 14 is formed by the back sheet 12. Further, a three-dimensional gather 15 formed of a continuous body from the back sheet 12 is provided on both sides in the longitudinal direction of the napkin main body 14, and the shorts facing surface of the napkin main body 14 is shorted when worn. The adhesive material 16 for sticking with these is applied.

  In the film 18, from the viewpoint of prevention of body fluid leakage and stuffiness, after forming a sheet by melt-kneading an inorganic filler in an olefin resin such as polyethylene and polypropylene, for example, water-permeable and moisture-permeable, A microporous sheet obtained by centrifuging in a uniaxial or biaxial direction is preferably used. Moreover, you may use what coated acrylic resin, polyurethane resin, etc. directly on base materials, such as a nonwoven fabric.

  When the film 18 is provided between the back sheet 12 and the absorbent body 13 as in the napkin 10 ′ according to the present embodiment, the body fluid absorbed by the absorbent body 13 is prevented from oozing out into the back sheet 12. Can do.

  Therefore, according to the napkin 10 'according to the present embodiment, it is possible to manufacture a napkin that can prevent body fluid from seeping into the back sheet 12 even if the manufacturing process is simplified, and as a result, higher A napkin having a function can be manufactured at low cost.

  FIG. 4 is a cross-sectional view in the width direction of a sanitary napkin 10 ′ (A) according to a modification of the second embodiment of the present invention. This napkin 10 '(A) is the same as the napkin 10' according to the second embodiment described above except that both sides of the film extend to the side edge of the absorber. For this reason, the same code | symbol is attached | subjected about the component which is common in napkin 10 'which concerns on 2nd Embodiment mentioned above.

  Thus, when the film 18 is the napkin 10 ′ (A) extending to the side edge portion 13 s of the absorbent body 13, the body fluid absorbed by the absorbent body 13 is prevented from oozing out into the back sheet 12. In addition, it is possible to prevent body fluid from leaking out from the side edge 13s of the absorbent body 13, so-called side leakage.

  FIG. 5 is a cross-sectional view in the width direction of a sanitary napkin 10 ′ (B) according to another modification of the second embodiment of the present invention. The napkin 10 '(B) is entirely covered with a film 18 except for the central portion in the width direction of the absorbent body 13 which is a body fluid intrusion surface, and is superimposed on the upper surfaces of both side portions 18s and 18s of the film 18. Since the other configuration except that both side portions 11s and 11s of the top sheet 11 extend is the same as that of the napkin 10 'according to the second embodiment described above, the same components are denoted by the same reference numerals. It is attached. With the napkin 10 ′ (B) having such a configuration, it is possible to further prevent the side leakage of the body fluid absorbed by the absorber 13.

  FIG. 6 is a cross-sectional view in the width direction of a sanitary napkin 10 ′ (C) according to still another modification of the second embodiment of the present invention. In the napkin 10 '(C), both side portions 18s and 18s of the film extend to the upper surface of the both side portions 11s and 11s of the top sheet 11 to a portion excluding the central portion in the width direction of the top sheet 11, and are three-dimensional. The rest of the configuration is the same as that of the napkin 10 'according to the second embodiment described above except that the rising base point 15' of the gather 15 is in the vicinity of both side portions 18s and 18s of the film 18. The same reference numerals are given. With the napkin 10 ′ (C) having such a configuration, the excreted body fluid can be collected in the center in the width direction of the absorber 13, so that the body fluid can be more uniformly diffused in the absorber 13. it can.

  FIG. 7 is a cross-sectional view in the width direction of a sanitary napkin 10 ′ (D) according to still another modification of the second embodiment of the present invention. The napkin 10 '(D) is provided with a film 18 on a standing portion 19 (portion indicated by a dotted circle in FIG. 7) of the three-dimensional gather 15 in addition to the shorts facing surface 13m and the side edge portion 13s of the absorbent body 13. Since the other configuration is the same as that of the napkin 10 'according to the second embodiment described above, the same components are denoted by the same reference numerals.

  Thus, when the standing part 19 of the three-dimensional gather 15 is also provided with the film 18, it is possible to prevent the excreted body fluid from seeping out from the standing part 19 of the three-dimensional gather 15, and to remove the body fluid from the width of the absorber 13. Since they can be collected in the center of the direction, the body fluid can be diffused more uniformly in the absorbent body 13.

  In addition, since the touch will worsen when the film 18 extends to the height direction upper part of the solid gather 15, there exists a possibility of giving a wearer a discomfort. Therefore, it is more preferable that the front end portion of the three-dimensional gather 15 has a structure of only the back sheet 12 made of a nonwoven fabric because a soft touch feeling can be given to the wearer.

  Next, a sanitary napkin 10 ″ according to a third embodiment of the present invention will be described. As shown in the cross-sectional view in the width direction of the napkin 10 ″ in FIG. 8, this napkin 10 ″ is formed by cutting out the non-woven fabric on the shorts facing surface, that is, the central portion in the width direction of the back sheet, forming an opening, Except for the fact that the adhesive material for adhering to shorts or the like is applied to the film, it is the same as the sanitary napkin according to the second embodiment shown in FIG. 3 described above. Therefore, the same code | symbol is attached | subjected to the component which is common in sanitary napkin 10 'which concerns on 2nd Embodiment, and the description is abbreviate | omitted.

  That is, in the napkin 10 ″ according to the present embodiment, as shown in FIG. 8, the napkin body 14 is formed by the top sheet 11, the absorber 13, and the film 18 in order from the use surface side. Moreover, the three-dimensional gather 15 formed by the continuous body from the back sheet 12 from the shorts opposing surface 18m of the both-sides 18s and 18s of the film 18 is provided in the longitudinal direction both sides of the napkin main body 14, and also a film The adhesive material 16 for sticking shorts etc. at the time of mounting | wearing is applied to 18 shorts opposing surface 18m.

  When the adhesive material 16 for adhering to shorts or the like is applied to the film 18 like the napkin 10 ″ according to this embodiment, the adhesive material 16 remains on the shorts when the napkin 10 ″ is peeled from the shorts. This can be prevented.

  Therefore, according to the napkin 10 ″ according to the present embodiment, even if the manufacturing process is simplified, it is possible to prevent body fluid from seeping out into the back sheet 12 and further prevent the adhesive 16 from remaining on the shorts. Can be produced at low cost.

  FIG. 9 is a cross-sectional view in the width direction of a sanitary napkin 10 ″ (A) according to a modification of the third embodiment of the present invention. This napkin 10 ″ (A) is obtained by cutting the shorts facing surface of the back sheet 12, providing an opening, and applying an adhesive 16 to the shorts facing surface 18m of the film 18 for attaching to the shorts and the like when worn. The other points are the same as those of the napkin 10 ′ (A) according to the modified example of the second embodiment shown in FIG. 4 described above. Therefore, the same code | symbol is attached | subjected to the common component.

  FIG. 10 is a cross-sectional view in the width direction of a sanitary napkin 10 ″ (B) according to another modification of the third embodiment of the present invention. This napkin 10 ″ (B) is provided with an opening on the shorts facing surface of the back sheet 12 and, when worn, the adhesive 16 for adhering to the shorts or the like is applied to the shorts facing surface 18m of the film 18. The other points are the same as those of the napkin 10 ′ (B) according to the modified example of the second embodiment shown in FIG. Therefore, the same code | symbol is attached | subjected to the common component.

  FIG. 11 is a cross-sectional view in the width direction of a sanitary napkin 10 ″ (C) according to still another modification of the third embodiment of the present invention. This napkin 10 ″ (C) is provided with an opening on the shorts facing surface of the back sheet 12 and, when worn, the adhesive 16 for adhering to the shorts or the like is applied to the shorts facing surface 18m of the film 18. The other points are the same as those of the napkin 10 ′ (C) according to the modified example of the second embodiment shown in FIG. Therefore, the same code | symbol is attached | subjected to the common component.

  FIG. 12 is a cross-sectional view in the width direction of a sanitary napkin 10 ″ (D) according to still another modification of the third embodiment of the present invention. This napkin 10 ″ (D) is provided with an opening on the shorts facing surface of the back sheet 12 and, when mounted, the adhesive 16 for adhering to the shorts or the like is applied to the shorts facing surface 18m of the film 18. The other points are the same as those of the napkin 10 ′ (D) according to the modified example of the second embodiment shown in FIG. Therefore, the same code | symbol is attached | subjected to the common component.

  Next, a method for manufacturing the napkin 10 as described above will be described.

  The method for manufacturing the napkin 10 includes at least (a) a step of disposing and adhering the elastic elastic members 17 to both ends of the back sheet 12, and (b) disposing the absorber 13 on the back sheet 12. (C) a step of arranging and bonding the top sheet 11 on the upper surface of the absorbent body 13; (d) a step of folding back both side portions of the back sheet 12; and (e). The step includes folding the back sheet 12 so as to cover the absorber 13, and (f) forming the three-dimensional gather 15 by folding the back sheet 12 outward at both widthwise sides of the upper surface of the napkin body 14. Has been.

  That is, the napkin 10 has elastic elastic members 17 disposed and bonded to both end portions on the back sheet 12 (step (a) above), and then at a predetermined interval at the center in the width direction on the back sheet 12. The absorber 13 is disposed and adhered (step (b) above). Subsequently, the top sheet 11 is disposed and bonded to the upper surface of the absorber 13 (step (c) above), and then both sides of the back sheet 12 are folded back to cover the elastic elastic member 17 (the above ( d) Step). Next, the back sheet 12 is folded inward so as to cover the absorber 13 (step (e) above), and then the back sheet 12 is folded outward at both sides in the width direction on the top sheet 11 so that the standing base point is a napkin. The three-dimensional gather 15 which is the upper surface of the main body is formed (step (f) above).

  Thereafter, an adhesive material 16 is applied to the outer surface side of the napkin main body 14, that is, to the shorts facing surface of the back sheet 12 at the time of wearing.

  Finally, each napkin 10, 10,... That is a continuous body is cut off at the front and rear edge portions to obtain the final product, that is, the present napkin 10. This final product (the present napkin 10) is folded into a predetermined shape and transferred to a downstream packing process.

  The means for adhering is not particularly limited, and various known means such as heat sealing and hot melt can be used, but adhesion by hot melt is more preferable. Also, the adhesive application pattern is not particularly limited, and can be appropriately selected depending on the application of the adhesive application portion.

  The step (d) may be performed immediately after the step (a) or immediately after the step (b).

  Furthermore, the adhesive 16 may be applied to the shorts facing surface of the backsheet 12 before assembling the napkin body 14, or may be applied to the shorts facing surface of the backsheet 12 during the process of assembling the napkin body 14. Also good.

  Accordingly, since the napkin 10 is constituted by the processes as described above and can be manufactured by one manufacturing line, the manufacturing process can be simplified and the napkin 10 can be manufactured at a lower cost. it can. That is, since the three-dimensional gather 15 is formed of a continuous body from the back sheet 12 in the napkin 10, it is not necessary to manufacture the three-dimensional gather with another manufacturing apparatus, and the three-dimensional gather 15 and the napkin body 14 are bonded. A process is also unnecessary.

  Next, the manufacturing method of the napkin which concerns on 2nd Embodiment of this invention is demonstrated.

  FIG. 13 is a schematic diagram of a method for manufacturing the napkin 10 ′ according to the second embodiment of the present invention. As shown in the figure, the method of manufacturing the napkin 10 'includes at least (g) a step of disposing and bonding a film 18 between the back sheet 12 and the absorber 13, and (a) the back sheet 12 (B) a step of disposing and adhering the absorber 13 on the film 18; and (c) a top sheet on the upper surface of the absorber 13. (D) a step of folding back both sides of the back sheet 12 inward, (e) a step of folding the back sheet 12 so as to cover the absorber 13, and (f) ) At the both sides in the width direction of the upper surface of the napkin main body 14, the back sheet 12 is folded outward to form a three-dimensional gather 15.

  That is, the napkin 10 ′ according to the second embodiment of the present invention shown in FIG. 3 is manufactured as follows. A film 18 having the length of the shorts facing surface of the absorber 13 is disposed and bonded to the center in the width direction on the back sheet 12 (step (g)), and elastically stretched at both ends on the back sheet 12. The member 17 is disposed and bonded (step (a) above), and then the absorber 13 is disposed and bonded to the central portion in the width direction on the film 18 (step (b) above). . Subsequently, the top sheet 11 is disposed and bonded to the upper surface of the absorber 13 (step (c) above), and then both sides of the back sheet 12 are folded back to cover the elastic elastic member 17 (the above ( d) Step). Next, the back sheet 12 is folded inward so as to cover the absorber 13 (step (e) above), and then the back sheet 12 is folded outward at both sides in the width direction on the top sheet 11 so that the standing base point is a napkin. A three-dimensional gather 15 which is the upper surface of the main body 14 is formed (step (f) above).

  Thereafter, an adhesive material 16 is applied to the outer surface side of the napkin main body 14, that is, to the shorts facing surface of the back sheet 12 at the time of wearing.

  Finally, each napkin 10 ′, 10 ′,..., Which is a continuous body, is cut off at the front and rear end portions to obtain a final product, that is, the present napkin 10 ′. This final product (present napkin 10 ') is folded into a predetermined shape and transferred to the downstream packing process.

  In addition, also about manufacture of napkin 10 'which concerns on 2nd Embodiment, as mentioned above, you may perform the said (d) process immediately after (a) process or immediately after (b) process. The step (g) may be performed after the step (a) and before the step (b).

  The adhesive 16 may be applied to the shorts facing surface of the backsheet 12 before assembling the napkin main body 14, or may be applied to the shorts facing surface of the backsheet 12 during the process of assembling the napkin main body 14. good.

  Moreover, the napkin 10 '(A) according to the modification of the second embodiment of the present invention shown in FIG. 4 is a step ((h) of folding the film 18 along the absorbent body 13 before the step (e). ) Since the other steps except for including step) are manufactured in the same manner as the napkin 10 'according to the second embodiment described above, the description of the same steps is omitted.

  That is, this napkin 10 '(A) is manufactured as follows. At the center in the width direction on the back sheet 12, a film 18 having a length obtained by adding the shorts facing surface and side edges of the absorber is disposed and bonded (step (g)), and both end portions on the back sheet 12 The elastic elastic member 17 is disposed and bonded to each of them (step (a) above), and then the absorber 13 is disposed and bonded to the central portion in the width direction on the film 18 with a predetermined interval (see above). (B) Step). Subsequently, the top sheet 11 is disposed and bonded to the upper surface of the absorber 13 (step (c) above), and then both sides of the back sheet 12 are folded back to cover the elastic elastic member 17 (the above ( d) Step). Next, the film 18 is folded inward along the absorber 13 (the above (h) step), and then the back sheet 12 is folded inward so as to cover the absorber 13 (the above (e) step). Then, the back sheet 12 is folded outward at both sides in the width direction on the top sheet 11 to form a three-dimensional gather 15 whose standing base point is the upper surface of the napkin body 14 (step (f)).

  Note that the step (h) may be performed after the step (c) and before the step (e) as described above, but may be performed immediately before the step (c).

  As described above, the napkin manufacturing method includes the step (h), whereby the napkin 10 '(A) in which both side portions of the film 18 are extended to the side edge portion 13s of the absorber 13 can be manufactured. . In addition, although (e) process and (h) process may be performed separately, you may perform simultaneously. That is, the back sheet 12 and the film 18 may be folded together so as to be along the absorber 13 (so as to cover the absorber 13).

  Further, in the method of manufacturing the napkin 10 '(B) according to another modification of the second embodiment of the present invention shown in FIG. 5, the step (h) is performed after the step (b) and (c) The other steps except for being performed before the step are the same as the steps for manufacturing the napkin 10 ′ (A) according to the modified example of the second embodiment described above.

  That is, this napkin 10 '(B) is manufactured as follows. A film 18 having a length capable of covering a portion excluding the central portion in the width direction of the body fluid intrusion surface of the absorber 13 is disposed and adhered to the central portion in the width direction on the back sheet 12 (step (g)), Elastic stretchable members 17 are disposed and bonded to both ends on the backsheet 12 (step (a) above), and then the absorber 13 is arranged at a predetermined interval in the center in the width direction on the film 18. And bonding (step (b) above). Subsequently, the film 18 is folded inward along the absorbent body 13 (so as to cover the absorbent body 13) (step (h)), and then the top sheet 11 is disposed and adhered to the upper surface of the absorbent body 13. (Step (c) above), and thereafter, both sides of the back sheet 12 are folded back to cover the elastic elastic member 17 (step (d) above). Next, the back sheet 12 is folded inward so as to cover the absorber 13 (step (e) above), and then the back sheet 12 is folded outward at both sides in the width direction on the top sheet 11 so that the standing base point is a napkin. A three-dimensional gather 15 which is the upper surface of the main body 14 is formed (step (f) above).

  As described above, the step (h) is performed after the step (b) and before the step (c), so that the entire portion excluding the intermediate portion in the width direction of the absorbent body 13 serving as a body fluid intrusion surface is the film 18. In addition, the napkin 10 ′ (B) can be manufactured in which the both side portions 11s, 11 of the top sheet 11 extend on the upper surfaces of the both side portions 18s, 18s of the film 18.

  Further, in the method of manufacturing the napkin 10 '(C) according to still another modification of the second embodiment of the present invention shown in FIG. 6, the step (h) is performed after the step (c) and (e The other steps except that the three-dimensional gather 15 is formed by folding the back sheet 12 outward in the vicinity of both side portions 18s and 18s on the film 18 in the step (e) are performed before the step). It is the same as the process of manufacturing the napkin 10 '(A), 10' (B) according to the modified example of the second embodiment.

  That is, this napkin 10 '(C) is manufactured as follows. A film 18 having a predetermined length is disposed and adhered to the center in the width direction on the back sheet 12 (step (g)), and elastic elastic members 17 are disposed on both ends of the back sheet 12. After adhering (step (a) above), the absorber 13 is then disposed at a predetermined interval in the center of the width direction on the film 18 and bonded (step (b) above). Subsequently, the top sheet 11 is disposed and bonded to the upper surface of the absorber 13 (step (c) above), and then the film 18 is folded inward along the absorber 13 (step (h) above). Then, the both sides of the back sheet 12 are folded inward to cover the elastic elastic member 17 (step (d) above). Next, the back sheet 12 is folded inward so as to cover the absorbent body 13 (step (e) above), and then the back sheet 12 is folded outward in the vicinity of both side portions 18 s and 18 s on the film 18. A three-dimensional gather 15 which is the upper surface of the main body 14 is formed (step (f) above).

  As described above, the step (h) may be performed after the step (c) and before the step (d), but after the step (d) and before the step (e). You can go. When the step (d) is performed immediately after the step (a) or immediately after the step (b), the step (h) is performed after the step (c) and before the step (e). Just do it.

  As described above, the step (h) is performed after the step (c) and before the step (e), whereby the both side portions 18s and 18s of the film 18 are changed to the upper surfaces of the both side portions 11s and 11s of the top sheet 11. Thus, the top sheet 11 can be extended to a portion excluding the central portion in the width direction, and the back sheet 12 is folded outward in the vicinity of both side portions 18 s and 18 s on the film 18, so that the standing base point 15 ′ becomes the film 18. The present napkin 10 '(C) having the three-dimensional gathers 15 in the vicinity of the upper side portions 18s and 18s, that is, on the upper surface of the napkin main body 14 can be manufactured.

  Furthermore, in the method of manufacturing the napkin 10 ′ (D) according to still another modification of the second embodiment of the present invention shown in FIG. 7, the width direction of the upper surface of the napkin body 14 is changed after the step (f). Other steps except for including a step of folding back both sides of the film 18 extending to both sides on the top sheet 11 at the both sides (step (i)) are the same as those in the second embodiment described above. It is the same as the process of manufacturing the napkin 10 '(C) according to the modified example.

  That is, this napkin 10 '(D) is manufactured as follows. A film 18 having a predetermined length is disposed and bonded to the central portion in the width direction on the back sheet 12 (step (g)), and elastic elastic members 17 are disposed on both ends of the back sheet 12. After adhering (step (a) above), the absorber 13 is then disposed at a predetermined interval in the center of the width direction on the film 18 and bonded (step (b) above). Subsequently, the top sheet 11 is disposed and bonded to the upper surface of the absorber 13 (step (c) above), and then both sides of the back sheet 12 are folded back to cover the elastic elastic member 17 (the above ( d) Step). Next, the film 18 is folded inward along the absorber 13 (the above (h) step), and then the back sheet 12 is folded inward so as to cover the absorber 13 (the above (e) step). Next, the back sheet 12 is folded outward in the vicinity of both side portions 18s and 18s on the film 18 to form a three-dimensional gather 15 whose standing base point is the upper surface of the napkin body 14 (step (f) above), and then the top sheet 11 The both side portions of the film 18 extending on both upper side portions are folded outward at both side portions on the top sheet 11 (step (i) above).

  In addition, although (h) process and (e) process and (f) process and (i) process may be performed separately, you may perform simultaneously. That is, the back sheet 12 and the film 18 are folded together along the absorbent body 13, and the back sheet 12 and the film 18 are joined together so as to form a three-dimensional gather 15 whose standing base point is the upper surface of the napkin body 14. It may be folded outward at both sides of the main body 14.

  As described above, the process (i) is included in the napkin manufacturing method, so that the film 18 extends to the standing portion 19 of the three-dimensional gather 15 in addition to the shorts facing surface 13m and the side edge portion 13s of the absorbent body 13. Napkin 10 '(D) can be manufactured.

  The method for manufacturing the napkin 10 ', 10' (A), 10 '(B), 10' (C), 10 '(D) according to the second embodiment of the present invention is constituted by the steps as described above. ing. Therefore, even if the film 18 is provided between the back sheet 12 and the absorbent body 13, the napkin 10 ′ can be manufactured on one manufacturing line and the manufacturing process can be simplified. Like the napkin 10 according to the first embodiment, it can be manufactured at a lower cost.

  Next, a method for manufacturing the napkin 10 '' according to the third embodiment of the present invention will be described.

  FIG. 14 is a schematic diagram of a method for manufacturing the napkin 10 ″ according to the third embodiment of the present invention. As shown in the drawing, the method of manufacturing the napkin 10 ″ includes at least (j) a step of dividing the backsheet 12 into two in the width direction and arranging them in parallel, and (k) the backsheet 12 arranged in parallel. A step of disposing and adhering the film 18 on each inner end of the sheet, and (a) a step of disposing and adhering the elastic elastic member 17 to each of the both ends of the backsheet 12, and (b) a film A step of disposing and adhering the absorber 13 on 18, (c) a step of disposing and bonding the top sheet 11 on the upper surface of the absorber 13, and A step of folding inward, (e) a step of folding the backsheet 12 so as to cover the absorber 13, and (f) a three-dimensional shape by folding the backsheet 12 outward on both sides of the upper surface of the napkin body 14 in the width direction. Form gather 15 It is constituted by a degree.

  That is, the napkin 10 ″ according to the third embodiment of the present invention shown in FIG. 8 is manufactured as follows. As shown in FIG. 14, the back sheet 12 is divided into 12 r and 12 l from the approximate center in the width direction of the napkin main body 14, and the two divided back sheets 12 r and 12 l are spaced apart from the width of the absorber 13. The film 18 is arranged in parallel with each other (step (j) above), and the film 18 is bridged on the inner end portions 12r 'and 12l' of the back sheets 12r and 12l arranged in parallel. Both side portions 18s and 18s are disposed and bonded (step (k) above), and elastic elastic members 17 are disposed and bonded to the outer end portions 12r ″ and 12l ″ of the backsheets 12r and 12l, respectively. (Step (a) above), then, the absorber 13 is disposed and bonded to the central portion in the width direction on the film 18 at a predetermined interval (step (b) above). Subsequently, the top sheet 11 is disposed and bonded to the upper surface of the absorbent body 13 (step (c) above), and then the outer end portions 12r ″ and 12l ″ of the back sheet 12 are folded back to elastically expand and contract. The member is covered (step (d) above). Next, the back sheets 12r and 12l are folded inward so as to cover the absorbent body 13 (step (e) above), and then the outer end portions 12r ″ and 12l ″ of the back sheet 12 are respectively placed on the top sheet 11. The three-dimensional gathers 15 having the rising base points on the upper surface of the napkin main body 14 are formed on both sides in the width direction (step (f)).

  Then, the adhesive 16 for sticking with shorts etc. is apply | coated to the outer surface side of the napkin main body 14, ie, the shorts opposing surface 18m of the film 18, at the time of mounting | wearing.

  Finally, each napkin 10 ″, 10 ″,..., Which is a continuous body, is cut off at the front and rear end portions to obtain a final product, that is, the present napkin 10 ″. This final product (present napkin 10 ″) is folded into a predetermined shape and transferred to a downstream packing process.

  In addition, also in the manufacture of the napkin 10 ″ according to the third embodiment, as described above, the step (d) may be performed immediately after the step (a) or immediately after the step (b). Further, the step (k) may be performed after the step (a).

  The adhesive 16 may be applied to the shorts facing surface 18m of the film 18 before the napkin body 14 is assembled, or may be applied to the shorts facing surface 18m of the film 18 during the process of assembling the napkin body 14. good.

  Further, in the method of manufacturing the napkin 10 ″ (A) according to the modification of the third embodiment of the present invention shown in FIG. 9, the steps (j) and (k) are performed instead of the step (g). The other steps other than the above are the same as the steps for manufacturing the napkin 10 ′ (A) according to the modified example of the second embodiment described above.

  Further, in the method of manufacturing the napkin 10 ″ (B) according to the modified example of the third embodiment of the present invention shown in FIG. 10, the steps (j) and (k) are performed instead of the step (g). The other processes other than the above are the same as the processes for manufacturing the napkin 10 ′ (B) according to the modified example of the second embodiment described above.

  Further, in the method of manufacturing the napkin 10 ″ (C) according to the modification of the third embodiment of the present invention shown in FIG. 11, the steps (j) and (k) are performed instead of the step (g). The other steps other than the above are the same as the steps for manufacturing the napkin 10 ′ (C) according to the modified example of the second embodiment described above.

  Further, in the method of manufacturing the napkin 10 ″ (D) according to the modification of the third embodiment of the present invention shown in FIG. 12, the steps (j) and (k) are performed instead of the step (g). The other steps other than the above are the same as the steps for manufacturing the napkin 10 ′ (D) according to the modified example of the second embodiment described above.

  Therefore, the method of manufacturing the napkin 10 ″, 10 ″ (A), 10 ″ (B), 10 ″ (C), 10 ″ (D) according to the third embodiment of the present invention is described above. It is comprised by such a process. Therefore, even if an opening is provided on the short sheet facing surface of the backsheet 12, it can be manufactured on one manufacturing line and the manufacturing process can be simplified, so that the napkin 10 ″ has a higher function. The present napkin 10 ″ can be manufactured at a lower cost in the same manner as the napkin 10, 10 ′ described above.

  The present invention is not limited to the case where the absorbent article is a sanitary napkin as described above, but also a sanitary napkin having a wing, a panty liner, a tape-type disposable paper diaper, a pants-type disposable paper diaper, a urine removing pad, or an incontinence. The present invention can also be applied to various known absorbent articles such as personal pants.

1 is a perspective view of a napkin according to the present invention. It is XX sectional drawing of FIG. It is width direction sectional drawing of the napkin which concerns on 2nd Embodiment of this invention. It is width direction sectional drawing of the napkin which concerns on the example of a change of 2nd Embodiment of this invention. It is width direction sectional drawing of the napkin which concerns on the example of a change of 2nd Embodiment of this invention. It is width direction sectional drawing of the napkin which concerns on the example of a change of 2nd Embodiment of this invention. It is width direction sectional drawing of the napkin which concerns on the example of a change of 2nd Embodiment of this invention. It is width direction sectional drawing of the napkin which concerns on 3rd Embodiment of this invention. It is width direction sectional drawing of the napkin which concerns on the example of a change of 3rd Embodiment of this invention. It is width direction sectional drawing of the napkin which concerns on the example of a change of 3rd Embodiment of this invention. It is width direction sectional drawing of the napkin which concerns on the example of a change of 3rd Embodiment of this invention. It is width direction sectional drawing of the napkin which concerns on the example of a change of 3rd Embodiment of this invention. It is a schematic diagram which shows the manufacturing process of the napkin which concerns on this invention. It is a schematic diagram which shows the manufacturing process of the napkin which concerns on 3rd Embodiment of this invention. It is a perspective view of the conventional absorbent article. It is YY sectional drawing of FIG.

Explanation of symbols

10, 10 ', 10 ", 100 Absorbent article, sanitary napkin 11 Top sheet 12 Back sheet 13 Absorber 13s Absorber side edge 13m Absorber shorts facing surface 14 Article body, napkin body 15 Solid gather 15 ′ Standing origin 16 of the three-dimensional gathers Adhesive material 17 Elastic elastic member 18 Film 18m Shorts facing surface 19 of the three-dimensional gather

Claims (15)

  An article body is formed by a top sheet, a back sheet, and an absorbent body interposed between the two sheets, and has a three-dimensional gather projecting toward the use surface side of the article body. An absorbent article, wherein a three-dimensional gather is formed of a continuous body from the back sheet.   The absorbent article according to claim 1, wherein a film is provided between the back sheet and the absorber.   The absorbent article according to claim 2, wherein the film extends to a side edge of the absorber.   The absorbent article according to claim 2, wherein the whole of the absorbent body is covered with the film except for the central portion in the width direction.   3. The absorbent article according to claim 2, wherein both side portions of the film extend to a portion excluding a central portion in the width direction of the top sheet on the upper surface of both side portions of the top sheet.   The absorbent article according to claim 5, wherein the standing base point of the three-dimensional gather is in the vicinity of both side portions of the film.   The absorbent article according to claim 2, wherein the film extends to an upright portion of the three-dimensional gather.   The absorbent article according to any one of claims 2 to 7, wherein the back sheet has an opening formed on an outer surface side of a central portion in the width direction of the article main body. A method for manufacturing an absorbent article, wherein an article body is formed by a top sheet, a back sheet, and an absorbent body interposed between the two sheets, and has a three-dimensional gather projecting toward the use surface side of the article body. And
Arranging and bonding an elastic stretch member to each of both ends of the backsheet; and
Disposing and adhering the absorber on the backsheet; and
Arranging and bonding the top sheet on the upper surface of the absorber; and
Folding each side of the backsheet along the absorber;
A step of forming a three-dimensional gather by folding the back sheet at both sides in the width direction of the upper surface of the article body;
The manufacturing method of the absorbent article characterized by including this.   The method for producing an absorbent article according to claim 9, comprising a step of disposing and bonding a film between the back sheet and the absorber.   The method for producing an absorbent article according to claim 10, comprising a step of folding each side of the film so as to be along a side edge of the absorber.   The method for producing an absorbent article according to claim 10 or 11, further comprising a step of folding the film at both side portions in the width direction of the upper surface of the article main body. A method for manufacturing an absorbent article, wherein an article body is formed by a top sheet, a back sheet, and an absorbent body interposed between the two sheets, and has a three-dimensional gather projecting toward the use surface side of the article body. And
Dividing the backsheet into two parts and arranging them in parallel;
Arranging and bonding a film on each inner end of the backsheet arranged in parallel; and
Arranging and bonding an elastic stretch member to each of both ends of the backsheet; and
Disposing and adhering the absorber on the film; and
Arranging and bonding the top sheet on the upper surface of the absorber; and
Folding each side of the backsheet inward,
Folding the backsheet so as to cover the absorber;
A step of forming the three-dimensional gather by folding the back sheet outward at both sides in the width direction of the upper surface of the napkin body;
The manufacturing method of the absorbent article characterized by including this.   The method for producing an absorbent article according to claim 13, comprising a step of folding each side portion of the film so as to be along a side edge portion of the absorber. The method for producing an absorbent article according to claim 13 or 14, further comprising a step of folding the film at both sides in the width direction of the upper surface of the article main body.

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