JP6105274B2 - Disposable absorbent article having a fastener for disposal - Google Patents

Description

  The present invention relates to a disposable absorbent article having a fastener for disposal.

  In a disposable absorbent article comprising a first layer having a liquid-absorbent core and a liquid-impermeable second layer covering the first layer, receiving the wearer's discharge upon disposal after wearing The fastening as a fixing means for holding the disposable absorbent article in a reduced form (hereinafter referred to as “disposal form”) by wrapping or folding the disposable absorbent article so as to enclose the contaminated portion of the first layer. Those equipped with ingredients are known. A disposable absorbent article having a fastener for disposal is, for example, a diaper or a sanitary product.

  Patent Document 1 discloses an absorbent article such as a diaper having a fixing means for disposal. In Patent Document 1, “The present invention relates to an absorbent article (10) including an absorbent core (12) disposed between an inner cover sheet (14) and an outer cover sheet (16). , Further comprising at least one disposal fixing means (18), which is directly or indirectly coupled to the outer cover sheet (16). A fixing element (20) which makes it possible to fix the article in a configuration that facilitates disposal after the article has been used, the fixing means for disposal (18) being a layer of material (22 This material layer (22) extends beyond the disposal securing means (18), which is attached to an integral part of the outer cover sheet (16). Or is an integral part of this Formed and concealing the waste securing means (18) when not in use The material layer (22) is removable from the outer cover sheet (16) and the waste securing means (18) It is exposed for use. "

  Patent document 2 discloses the laminated tape tab used for disposable absorbent products, such as a diaper. Patent Document 2 states that “the disposable tape tab of the present invention can be used for disposable products, particularly pants or shorts-type baby diapers or adult incontinence products by means of an adhesive provided in the tape tab element. Disposal of disposable products. When doing so, the user can grasp one end of the disposal tape tab and stretch the tab by plastic deformation of the low-yield stretchable film so that the tab can be fully stretched to wrap around the product, Random and / or compacted products are fixed in their state and discarded, so the present invention provides an economical and practical solution for manufacturing disposable tape tabs, while at the same time It enables simple and reliable sealing. "

  Patent document 3 discloses the disposable diaper which provided the fastening tape for disposal in the exterior body. Patent Document 3 states that even if a soft (low breaking strength) exterior body is used, when the fastening tape is pulled during use, the exterior body is not easily broken at the joint with the fastening tape. Is provided. "

Special table 2008-541925 (summary) JP-T 2009-507570 (paragraph 0013) JP 2007-215948 (paragraph 0005)

  In the disposable absorbent article having a fastener for disposal, it is possible to prevent the discharge of waste and its residue from the disposable absorbent article in the disposal form, the material cost of the fastener can be reduced, and the user can attach the fastener. It is desired to be able to operate easily.

  One embodiment of the present invention is a first layer having a liquid-absorbent core, and a liquid-impermeable second layer that covers the first layer, and includes a first region and a second region that are adjacent to each other. A second layer having a fastener, a fastener installed in the first region of the second layer, and an external force applied to the fastener to allow the first region of the second layer to be partially separated from the second region A disposable absorbent article comprising a separating mechanism.

  In the disposable absorbent article according to one aspect of the present invention, the first region can be expanded with respect to the second region so as to be separated from the first layer when partially separated from the second region by the separation mechanism. In cooperation with the fastener, the disposable absorbent article can be held in a discarded form. That is, the first region partially separated from the second region of the second layer by the separation mechanism can be expanded with respect to the second region so as to be separated from the first layer, and in that state, the fastener having a mooring function And it can act like a cable tie. Therefore, the disposable absorbent article can be held in a disposal form in which the fouling portion of the first layer that has received the wearer's discharge is wrapped inside by the cooperation of the first region and the fastener, and the disposable in the disposal form. It is possible to prevent the discharge from the absorbent article and the leakage of the residue. Further, even when a relatively short fastener is used, the first region of the second layer expands with respect to the second region to supplement the length of the fastener, and the fastener and the first region It can act like a cable tie with a combination of Therefore, the material cost of a fastener can be reduced and the manufacturing cost of a disposable absorbent article can be reduced. Since the fastener can be arranged exposed outside the second layer of the disposable absorbent article, the user can easily operate the fastener.

It is an expanded sectional view of the principal part of the disposable absorbent article by one Embodiment. It is a partially cutaway perspective view of an example of the disposable absorbent article of FIG. It is an expanded sectional view explaining the disposal method of the disposable absorbent article of FIG. It is an expanded sectional view explaining the disposal method of the disposable absorbent article of FIG. It is an expanded sectional view explaining the disposal method of the disposable absorbent article of FIG. It is a perspective view explaining the disposal method of the disposable absorbent article of FIG. It is a figure which shows typically the various structures of the separation mechanism which the disposable absorbent article of FIG. 1 has. It is a figure which shows typically the various structures of the separation mechanism which the disposable absorbent article of FIG. 1 has. It is a figure which shows typically various arrangement | positioning of the fastener which the disposable absorbent article of FIG. 1 has. It is a figure which shows the modification of the fastener which the disposable absorbent article of FIG. 1 has. It is a figure which shows the other modification of the fastener which the disposable absorbent article of FIG. 1 has. It is a figure explaining the manufacturing process of the fastener which the disposable absorbent article of FIG. 1 has, (a) The figure which shows typically an example of the manufacturing apparatus of a fastener, (b) The end elevation of the laminated tape which comprises a fastener And (c) is a perspective view showing the same laminated tape wound around a roll. It is a figure explaining the manufacturing process of the disposable absorbent article of FIG. 1, and is a figure which shows typically an example of the manufacturing apparatus of a disposable absorbent article.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Corresponding components are denoted by common reference symbols throughout the drawings. Note that the term “disposable absorbent article” in this application refers to accepting various discharges discharged from the body of the wearer of the article while absorbing liquid, and then being disposed of without being reused. Means an article configured as such.

  FIG. 1 shows an enlarged cross-sectional view of a main part of a disposable absorbent article 10 (hereinafter abbreviated as article 10) according to an embodiment. FIG. 2 shows a pants-type diaper as an example of the article 10 in a partially cutaway perspective view. The article 10 is not limited to the pants-type diaper shown in FIG. 2, and may be a sanitary product such as a diaper of another form such as a tape-clamping type or a pad type, or a napkin or a shorts-integrated napkin.

  The article 10 includes a first layer 14 having a liquid-absorbing core 12 and a liquid-impermeable second layer 16 that covers the first layer 14. The first layer 14 and the second layer 16 constitute an article body 18 having a laminated structure. When the article 10 is worn, the first layer 14 is disposed adjacent to the wearer's skin on the inner surface side of the article body 18, and the second layer 16 is disposed on the outer surface side of the article body 18, such as the wearer's clothes. Is placed adjacent to.

  The liquid absorbent core 12 is a flexible core material included in the first layer 14 and has sufficient liquid absorbency and liquid retainability to quickly absorb and retain the liquid component of the wearer's discharge. Moreover, the liquid-absorbent core 12 can have suitable compressibility and shape followability which can be arrange | positioned along a wearer's body. The liquid absorbent core 12 can be made from various known materials that exhibit liquid absorbency and liquid retention with respect to the wearer's discharge. Further, the liquid-absorbent core 12 can be made from a single material, or can be made from a plurality of materials.

  The first layer 14 includes an inner sheet 20 laminated on one surface of the liquid absorbent core 12, and an outer sheet 22 laminated on the other surface of the liquid absorbent core 12 on the side opposite to the inner sheet 20. Can further be included. The inner sheet 20 is a flexible sheet that forms a surface that touches the wearer's skin, and has sufficient liquid permeability to allow the liquid component of the wearer's discharge to pass through without impeding and to supply the absorbent core 12. . Further, the inner sheet 20 can have an appropriate hydrophobicity to separate the wearer's skin from the liquid held in the liquid-absorbent core 12. The inner sheet 20 can be made from various materials such as a porous foam, a reticulated foam, a perforated film, natural fibers (for example, wood fibers and cotton fibers), and synthetic fibers (for example, polyester fibers and polypropylene fibers). The inner sheet 20 may have a single material single-layer structure or a multi-material laminated structure. Examples of the material of the inner sheet 20 include a polypropylene nonwoven fabric.

  The outer sheet 22 is a flexible sheet on the side that does not touch the wearer's skin, and has sufficient liquid impermeability to prevent the liquid held in the liquid absorbent core 12 from passing therethrough. In addition, the outer sheet 22 can have an appropriate air permeability that allows passage of vapor diffused from the liquid absorbent core 12. The outer sheet 22 can be made of various materials such as a porous plastic film and a nonwoven fabric. The outer sheet 22 may have a single material single-layer structure or a multi-material laminated structure. Examples of the material of the outer sheet 22 include a polypropylene nonwoven fabric. The outer sheet 22 can surround the entire liquid-absorbent core 12 in cooperation with the inner sheet 20. The first layer 14 may be configured without the inner sheet 20 or the outer sheet 22.

The second layer 16 is a flexible sheet having the same physical properties as the outer sheet 22 and can be made of the same material as the outer sheet 22. The surface 16b of the second layer 16 opposite to the surface 16a in contact with the outer sheet 22 can be provided with a color, pattern, picture, character, or the like that affects the appearance of the article body 18 by printing or the like. When the article 10 is a pants-type diaper shown in FIG. 2, for example, a polypropylene nonwoven fabric having a basis weight of 25 g / m ² manufactured by a spunbond method can be used as the outer sheet 22 and the second layer 16. .

  Between the liquid-absorbent core 12 and the inner sheet 20, between the liquid-absorbent core 12 and the outer sheet 22, and between the outer sheet 22 and the second layer 16 over the entire surface, or at least Partially, they can be bonded to each other by a known bonding means such as an adhesive such as a pressure-sensitive adhesive or a hot melt adhesive, ultrasonic welding, thermal welding or the like. Further, the outer edge portions of the inner sheet 20 and the outer sheet 22 surrounding the liquid-absorbent core 12 can be bonded to each other by the same bonding means.

  When the article 10 is a pants-type diaper shown in FIG. 2, the article body 18 is folded in half at the center in the longitudinal direction, with the first layer 14 as an inner side, from a developed form molded into an hourglass-like predetermined contour. The overlapping side edges are partially joined to produce a pants-type. In FIG. 2, the second layer 16 and a portion of the outer sheet 22 are cut away to reveal the absorbent core 12. The pant-type article body 18 has one torso opening 24 through which the wearer's torso passes, and two thigh openings 26 through which the wearer's thigh passes (only one is shown). A joint portion 28 of the article body 18 is formed between the trunk opening 24 and each thigh opening 26. Each of the trunk opening 24 and the thigh opening 26 is provided with a gathered portion containing rubber.

  The second layer 16 has a first region 30 and a second region 32 that are adjacent to each other. The first region 30 is a part of the second layer 16, and the second region 32 is a part other than the first region 30 of the second layer 16. The first region 30 and the second region 32 have the same physical properties and can be made of the same material. Alternatively, the first region 30 and the second region 32 can have different physical properties or can be made of different materials. In the configuration shown in FIG. 1, the first region 30 has a part of both surfaces 16 a and 16 b of the second layer 16, and the second region 32 has a remaining part of both surfaces 16 a and 16 b of the second layer 16. Have. Therefore, the first region 30 and the second region 32 both have a thickness corresponding to the thickness of the second layer 16 and are adjacent to each other in the direction along the surfaces 16a and 16b. Note that the boundary between the first region 30 and the second region 32 is not necessarily clearly defined, but is a line that partially separates the first region 30 and the second region 32 from each other in the disposal method of the article 10 to be described later. The region is the boundary between the regions 30 and 32.

  Instead of the configuration in FIG. 1, the first region 30 may have only the outer surface 16 b of the second layer 16. In this case, the first region 30 has a thickness smaller than the thickness of the second layer 16, and is adjacent to the second region 32 in both the direction along the surface 16 b and the thickness direction. The boundary between the first region 30 and the second region 32 is a planar portion that extends substantially parallel to the surface 16b inside the second layer 16 in addition to the above-described linear portion.

  The article 10 further includes a fastener 34 that is installed in the first region 30 of the second layer 16. The fastener 34 is fixedly attached to the first region 30 and is extended from the attachment portion 36, and is fixed to the second region 32 (or the first region 30 or the first layer 14) as necessary. And a fixing portion 38 that can be formed. The fastener 34 is installed in the first region 30 in a two-fold form in which the fixing portion 38 overlaps the attachment portion 36. The fastener 34 maintains a folded shape when not in use.

  The attachment portion 36 has a configuration of a pressure-sensitive adhesive tape including a strip-shaped base material 40 and a pressure-sensitive adhesive layer 42 provided on one surface of the base material 40. Similarly, the adhering portion 38 has a configuration of an adhesive tape including a strip-shaped base material 44 and a pressure-sensitive adhesive layer 46 provided on one surface of the base material 44. The fastener 34 is manufactured by joining one strip-shaped adhesive tape constituting the attachment portion 36 and another sheet-like adhesive tape constituting the fixing portion 38 together in the longitudinal direction. .

  The attachment portion 36 is fixed to the surface 16 b of the first region 30 by the pressure sensitive adhesive layer 42. A predetermined length portion 36 a at one end in the longitudinal direction of the attachment portion 36 is bent to the base material 40 side without being fixed to the surface 16 b of the first region 30. The fixing portion 38 is disposed with the pressure-sensitive adhesive layer 46 facing the base material 40 of the attachment portion 36. In the vicinity of one end in the longitudinal direction of the fixing portion 38, a portion 36a of the mounting portion 36 bent toward the substrate 40 (hereinafter referred to as a bent portion 36a) is formed by both pressure-sensitive adhesive layers 46 and 42. Seamed. In FIG. 1, a gap is formed between the base material 40 of the attachment portion 36 and the pressure-sensitive adhesive layer 46 of the fixing portion 38, but this gap is used for easy understanding of the configuration of the fastener 34. The unused fastener 34 may have the pressure-sensitive adhesive layer 46 of the fixing portion 38 attached to the base material 40 of the attachment portion 36.

  The base material 40 of the attachment part 36 and the base material 44 of the fixing part 38 can all be made from various materials such as plastic films, nonwoven fabrics, and laminates thereof. It is desirable that the base materials 40 and 44 have a strength (for example, tensile strength) that is not broken by an external force applied to the fastener 34 in the disposal method of the article 10 to be described later. Examples of the material of the base materials 40 and 44 include a blend of polypropylene and polyethylene. The outer surface of the base material 40, 44 opposite to the pressure sensitive adhesive layers 42, 46 can be subjected to a peeling treatment such as silicone coating. By applying a peeling process to the outer surfaces of the base materials 40 and 44, the fixing portion 38 of the unused fastener 34 can be attached to the base material 40 of the attachment portion 36 by the pressure-sensitive adhesive layer 46. As will be described later, in the manufacturing process of the article 10, the bi-fold fastener 34 can be supplied by being wound around a roll in a form continuous in a direction orthogonal to the paper surface of FIG. 1.

  The pressure-sensitive adhesive layer 42 of the mounting portion 36 can be made from various pressure-sensitive adhesives, but can produce an adhesive force that can permanently fix the fastener 34 to the first region 30 of the second layer 16. It is desirable to be. The pressure-sensitive adhesive layer 46 of the fixing portion 38 is fixed to the second region 32 (or the first region 30 or the first layer 14) of the second layer 16 when the article 10 is disposed of later. It is desirable to be able to produce an adhesive force that can be maintained against external forces. The pressure sensitive adhesive layers 42 and 46 can be made from the same pressure sensitive adhesive, or can be made from different pressure sensitive adhesives. Examples of the material of the pressure-sensitive adhesive layers 42 and 46 include synthetic rubber adhesives.

  The fastener 34 employs a configuration in which the entire attachment portion 36 and the fixing portion 38 are made of a single adhesive tape, instead of the above-described configuration in which two strip-shaped adhesive tapes are joined together. You can also The mounting portion 36 is permanently fixed to the first region 30 by another bonding means such as ultrasonic welding or heat welding, or other fixing means such as sewing instead of the pressure-sensitive adhesive layer 42. It can also be set as a structure. Further, the fixing portion 38 is replaced with the second region 32 (or the first region 30 or the first layer) in the disposal method described later of the article 10 by other fixing means such as a hook-and-loop fastener instead of the pressure-sensitive adhesive layer 46. 14) may be fixed.

  The article 10 further includes a separation mechanism 48 that allows the first region 30 of the second layer 16 to be partially separated from the second region 32 by an external force applied to the fastener 34. The separation mechanism 48 separates the first region 30 from the second region 32 when the external force applied to the fastener exceeds a predetermined value. When the external force for partially separating the first region 30 from the second region 32 is equal to or less than a predetermined value, the separation mechanism 48 does not separate the first region 30 from the second region 32 and both regions 30, 32. Maintain the initial state of being adjacent to each other.

  The separation mechanism 48 has a material weakening portion 50 formed at the boundary between the first region 30 and the second region 32. The material weakening part 50 enables tearing of the second layer 16 by an external force applied to the fastener 34. In the embodiment of FIGS. 1 and 2, the material weakening portion 50 is composed of a plurality of perforations (that is, perforations) aligned in a broken line shape. Or the material weakening part 50 can be comprised from the part which reduced the thickness of the 2nd layer 16 locally.

  In the configuration in which the second layer 16 is bonded to the first layer 14 (outer sheet 22) by the above-described known bonding means, the separation mechanism 48 has the second layer 16 with respect to the first layer 14 by the bonding means. The adhesive force reduction part 52 (FIG. 1) that lowers the adhesive force in the first region 30 than in the second region 32 can be provided. The adhesive force reducing unit 52 can be provided by changing the type of bonding means, the bonding area, and the like for the first layer 14 in the first region 30 and the second region 32. The first region 30 may not be adhered to the first layer 14. As the separation mechanism 48, the material weakening portion 50 and the adhesive force reducing portion 52 can be used in combination.

  The fastener 34 can have a tab 54 at the end that can receive a tensile force as an external force for tearing the second layer 16 at the material weakening portion 50. The tab 54 has, for example, a width substantially equal to the width of the fixing portion 38 (a dimension in a direction perpendicular to the paper surface of FIG. 1) and a length sufficiently shorter than the length of the fixing portion 38 (in the left-right direction in FIG. 1). And can be bonded to the fixing portion 38 by the pressure-sensitive adhesive layer 46 in an arrangement that slightly protrudes from the end of the fixing portion 38 in the length direction. The tab 54 may be disposed so as to protrude outward from the attachment portion 36 as illustrated, or may be disposed on the base material 40 of the attachment portion 36. The tab 54 can be made of various materials such as a plastic film, a nonwoven fabric, and a laminate thereof. It is desirable that the tab 54 has a tensile strength that does not cause breakage due to a tensile force applied to the fastener 34 during the disposal method of the article 10 to be described later.

  In the embodiment shown in FIG. 2, which is an example of the article 10, the material weakening portion 50 of the separation mechanism 48 is extended in a substantially U shape so as to substantially surround the fastener 34. The material weakening part 50 is provided at a position that surrounds at least the joining portion of the attachment part 36 and the fixing part 38 of the fastener 34 (and hence the bent portion 36a of the attachment part 36) (FIG. 1). In the pant-type diaper of FIG. 2 that is an example of the article 10, the fastener 34 faces the tab 54 toward the side close to the trunk opening 24, and the joining portion (bending portion 36 a) of the attachment portion 36 and the fixing portion 38 is provided. It is arranged toward the side close to the crotch portion 56 between the pair of thigh openings 26. The material weakening portion 50 is a substantially U-shaped broken line so as to surround the fastener 34 along the joining portion (bending portion 36a) of the fastener 34 and both side edges extending in the longitudinal direction of the folded fastener 34. It extends in a shape. The material weakening portion 50 is not formed on the trunk opening 24 side. During the disposal method of the article 10 to be described later, the first region 30 and the second region 32 are maintained permanently connected to each other at a place where the material weakening portion 50 is not present.

  In the article 10, the first region 30 is separated from the first layer 14 when the first region 30 of the second layer 16 is partially separated from the second region 32 by the separation mechanism 48. The article 10 can be held in a discarded form in cooperation with a fastener 34 that can be deployed with respect to 32 and has a mooring function. Hereinafter, an example of the disposal method of the article 10 will be described with reference to FIGS. 3-5 is sectional drawing of the principal part of the articles | goods 10, FIG. 6 is a perspective view at the time of disposal of the underpants type diaper as an example of the articles | goods 10. FIG.

  When the article 10 is discarded after being worn, the article 10 is held by the fastener 34 in a disposal form in which the contaminated portion of the first layer 14 that receives the wearer's discharge is wrapped inside. As an example of this disposal method, first, in a state where the article main body 18 is appropriately rolled or folded so as to wrap around the contaminated portion of the first layer 14, the fixing portion 38 of the fastener 34 is moved away from the attachment portion 36. Move. At this time, as shown in FIG. 3, the user holds the tab 54 so that the fixing portion 38 attached to the attachment portion 36 by the pressure-sensitive adhesive layer 46 is gradually peeled off from the attachment portion 36. A force F1 can be applied to the portion 38. The force F1 is released when the fixing portion 38 is pulled away from the attachment portion 36 except for the joint portion with the bent portion 36a (FIG. 3).

  Next, as shown in FIG. 4, the user applies a force F <b> 2 to the fixing portion 38 via the tab 54 so as to pull the fixing portion 38 in the longitudinal direction. The force F2 applied to the fixing portion 38 concentrates on the bent portion 36a of the attachment portion 36 and is transmitted to the second layer 16 of the article main body 18 directly below the bent portion 36a to be a material weakening portion of the separation mechanism 48. It concentrates on the site | part (for example, site | part corresponded to the base of a U shape) of 50 which is the closest to the bending part 36a. When the force F2 exceeds a predetermined value, the material weakening portion 50 starts to break at a portion closest to the bent portion 36a, and the material weakening portion 50 gradually advances by continuously pulling the fixing portion 38 in the longitudinal direction. Breaks.

  When the fixing portion 38 is further pulled in the longitudinal direction from the state shown in FIG. 4, the entire material weakening portion 50 is broken so that the second layer 16 is torn along the material weakening portion 50 and the first region 30 is formed. Partially separate from the second region 32. At this time, as shown in FIG. 5, the first region 30 is unfolded with respect to the second region 32 so as to be separated from the first layer 14, and the outer edge of the article body 18 (the trunk in the pant diaper in FIG. 2). It can extend outward beyond the periphery of the opening 24. In the state of FIG. 5, the entire fastener 34 installed in the first region 30 is more outward than the outer edge of the article body 18 (periphery of the trunk opening 24) due to the development of the first region 30 with respect to the second region 32. Is arranged. Further, the fixing portion 38 of the fastener 34 is arranged to protrude further outward from the end of the first region 30 separated from the outer edge of the article main body 18 (periphery of the trunk opening 24). The agent layer 46 is directed to the same side (lower side in the drawing) as the surface 16 b of the first region that is folded with respect to the second region 32.

  With the first region 30 in the unfolded position shown in FIG. 5, the fastener 34 is secured to an appropriate portion of the second region 32 of the second layer 16 of the article body 18 that is appropriately rolled or folded. The part 38 is fixed by the pressure-sensitive adhesive layer 46. The fastener 34 having the fixing portion 38 fixed to the second region 32 is a state in which the article body 18 is rolled or folded against an external force by its own tensile strength and the adhesive force of the pressure-sensitive adhesive layers 42 and 46. Moored to hold. At this time, as shown in FIG. 6, the first region 30 in the unfolded position acts together with the fastener 34 as a binding band that at least partially surrounds the article body 18. Accordingly, the first region 30 can be held in a discarded configuration in which the article 10 is tightened and reduced in cooperation with the fastener 34. When the first region 30 is disposed at the development position, the second layer 16 opens inside the material weakening portion 50 and partially exposes the first layer 14. However, the first layer 14 is exposed. When the outer sheet 22 has the outer sheet 22, the outer sheet 22 prevents leakage of the liquid held in the liquid-absorbent core 12 at the exposed portion. In addition, depending on the dimensions of the first region 30 and the fastener 34, the fastening portion 38 of the fastener 34 exceeds the second region 32 in a state where both surround the article main body 18, and the first region 30 on the inner side of the material weakening portion 50. In some cases, the first layer 14 may be fixed to the exposed portion of the layer 14, or may be fixed to the first region 30 at the development position beyond the exposed portion. In this case, the fixing portion 38 may be continuously fixed to two or more regions adjacent to each other among the second region 32, the exposed portion of the first layer 14, and the first region 30 in the developed position. .

  As described above, in the article 10, the first region 30 partially separated from the second region 32 of the second layer 16 by the separation mechanism 48 is expanded with respect to the second region 32 so as to be separated from the first layer 14. In this state, together with the fastener 34 having a mooring function, it can act like a binding band on the appropriately rounded or folded article body 18. Therefore, according to the article 10, the cooperation of the first region 30 and the fastener 34 can hold the article 10 in a disposal form in which the contaminated portion of the first layer 14 that has received the wearer's discharge is wrapped inside. Further, it is possible to prevent the discharge from the article 10 in the disposal form and the leakage of the residue.

  Further, in the article 10, the first region 30 of the second layer 16 is changed to the second region 32, although the bi-folded fastener 34 having a relatively short length when expanded as a whole is used. The length of the fastener 34 can be supplemented by expanding it, and the combination of the fastener 34 and the first region 30 can act like a cable tie. Therefore, according to the article 10, the material cost of the fastener 34 can be reduced, and thus the manufacturing cost of the article 10 can be reduced.

  In the article 10, the fastener 34 can be exposed and disposed outside the second layer 16 of the article body 18, so that the user can easily operate the fastener 34. By attaching the tab 54 to the fastener 34, the user can accurately apply the external force F <b> 2 required for the separation mechanism 48 to partially separate the first region 30 from the second region 32 to the fastener 34. it can.

  The article 10 is not limited to the configuration shown in FIGS. For example, as schematically shown in FIG. 7, the article 10 can have a material weakening portion 50 (separation mechanism 48) having various configurations.

  FIG. 7A shows the material weakening portion 50 extending in a substantially U-shaped broken line shape shown in FIG. On the other hand, the material weakening portion 50 shown in FIG. 7B converges in the vicinity of the joining portion (bending portion 36a) of the fastener 34, spreads on both sides of the fastener 34, and is a substantially V-shaped broken line. It extends in a shape. Further, the material weakening portion 50 shown in FIG. 7C extends along the outline of the article main body 18 in a large substantially U-shaped broken line. Moreover, the material weakening part 50 shown in FIG.7 (d) is extended in the hourglass-shaped broken line shape along the outline of the article | item main body 18. As shown in FIG. In any of the material weakening portions 50, not only a combination of straight lines as shown, but also a shape in which an appropriate curve is mixed can be formed.

  7A to 7D does not surround the entire first region 30, and the material weakening portion 50 is not formed between the first region 30 and the second region 32. Leave a place. In the above-described disposal method of the article 10, the developed first region 30 and second region 32 maintain a state where they are permanently connected to each other at a place where the material weakening portion 50 is not present. 7A to 7D, the fastener 34 provided in the first region 30 is a part of the material weakening portion 50 located on the side opposite to the portion where the material weakening portion 50 is not present. In addition, the joint portions (bending portions 36a) are arranged closest to each other. With such an arrangement, the force F2 (FIG. 4) applied to the fastener 34 via the tab 54 is transmitted from the bent portion 36a to the second layer 16 of the article body 18, and the material weakening portion 50 It is possible to concentrate the portion closest to the bent portion 36a and cause the material weakening portion 50 to break quickly and reliably. In addition, the site | part of the material weakening part 50 with which the bending part 36a of the fastener 34 is the nearest can be selected suitably.

  When the article 10 is a pants-type diaper shown in FIG. 2, the article body 18 including the first layer 14 and the second layer 16 includes a crotch portion 56, an abdominal portion 58 extended from the crotch portion 56, and an abdominal portion 58. The back part 60 extended from the crotch part 56 on the opposite side is provided (FIG. 2). In the pants-type diaper of FIG. 2, the first region 30 is provided on the back portion 60, and the portion other than the first region 30 of the back portion 60 and the crotch portion 56 and the abdomen 58 are the second region 32. When the article body 18 shown in FIGS. 7A to 7C is assumed to be the article body 18 of the pant-type diaper of FIG. 2, the first region 30 and the fastener 34 are at least one of the abdomen 58 and the back part 60. Can be provided. On the other hand, when it is assumed that the article body 18 shown in FIG. 7D is obtained by cutting the article body 18 of the pant-type diaper in FIG. 2 at the joint portion 28 (FIG. 2), the first region 30 is The back portion 60 and the crotch portion 56 are provided continuously, and the abdomen 58, the back portion 60, and the crotch portion 56 other than the first region 30 become the second region 32.

  As shown in FIGS. 7C and 7D, as the size of the first region 30 increases, the first region 30 and the fastener 34 cooperate in the above-described disposal method of the article 10. The size of the cable tie increases. Therefore, even when the amount of the wearer's discharge received by the first layer 14 is large, the contaminated portion of the first layer 14 that has received the discharge is placed inside by the first region 30 having a large size. While holding the article 10 in the wrapping disposal form, it is possible to more effectively prevent the discharge from the article 10 in the disposal form and leakage of the residue.

  When the material weakening part 50 is comprised from a perforation, as shown in FIG. 8, various perforations can be employ | adopted. FIG. 8A shows a perforation in which the dimension in the alignment direction (that is, the length L1) of each of the perforations aligned in a broken line shape is substantially equal to the dimension in the alignment direction between the adjacent perforations (that is, the interval L2). 50A is shown. FIG. 8B shows a perforation 50B in which the lengths L1 of the perforations aligned in a broken line shape are approximately 1 to 10 times the interval L2 between adjacent perforations. FIG. 8C shows a perforation in which the lengths L1 of the perforations aligned in a broken line shape are approximately 1 to 10 times the interval L2 between adjacent perforations, and the adjacent perforations have different lengths L1. 50C is shown. These perforations 50 </ b> A to 50 </ b> C can be appropriately selected in consideration of the material of the second layer 16 and the force required to tear the second layer 16 along the material weakening portion 50.

  As schematically shown in FIG. 9, the first region 30 and the fastener 34 of the article 10 can be arranged at various positions and in various orientations on the second layer 16.

  FIG. 9 (a) shows the first region 30 and the fastener 34 that are disposed in the approximate center of the article body 18. On the other hand, the first region 30 and the fastener 34 shown in FIG. 9B have one set on each of the left and right sides in the figure of the article body 18 with the tabs 54 of the fastener 34 facing the sides facing each other. Be placed. When the article 10 is a pants-type diaper shown in FIG. 2, the first region 30 and the fastener 34 of each set are disposed on the side close to the trunk opening 24. Further, the first region 30 and the fastener 34 shown in FIG. 9C are arranged one by one on the left and right sides in the figure of the article body 18 with the tabs 54 of the fastener 34 facing away from each other. The When the article 10 is a pants-type diaper shown in FIG. 2, the first region 30 and the fastener 34 of each set are disposed on the side close to the thigh opening 26.

  The first region 30 and the fastener 34 shown in FIG. 9D are arranged at the approximate center of the article body 18 with the tabs 54 of the fastener 34 facing sideways. The first region 30 and the fastener 34 shown in FIG. 9E are arranged at the lower end of the article body 18 with the tab 54 of the fastener 34 facing downward. The first region 30 and the fastener 34 shown in FIG. 9F are arranged at the lower end of the article body 18 with the tabs 54 of the fastener 34 facing sideways. The first region 30 and the fastener 34 shown in FIG. 9G are arranged at the lower end of the article body 18 with the tab 54 of the fastener 34 facing upward. The first region 30 and the fastener 34 shown in FIG. 9H are arranged at the upper end and the side end of the article body 18 with the tab 54 of the fastener 34 facing upward.

  9A to 9H, the material weakening portion 50 does not surround the entire first region 30, and the material weakening portion 50 is between the first region 30 and the second region 32. Locations that are not formed are provided. The fastener 34 is disposed so that the joining portion (bending portion 36a) is closest to a part of the material weakening portion 50 located on the side opposite to the portion where the material weakening portion 50 is not present. With such an arrangement, the force F2 (FIG. 4) applied to the fastener 34 via the tab 54 is transmitted from the bent portion 36a to the second layer 16 of the article body 18, and the material weakening portion 50 It is possible to concentrate the portion closest to the bent portion 36a and cause the material weakening portion 50 to break quickly and reliably. In addition, the site | part of the material weakening part 50 with which the bending part 36a of the fastener 34 is the nearest can be selected suitably.

  As shown in FIG. 9, the article 10 may include one or more first regions 30 and one fastener 34 installed in each of the first regions 30. Although not shown, the article 10 can include one or more first regions 30 and two or more fasteners 34 installed in each of the first regions 30. Further, the first region 30 and the fastener 34 correspond to a part of the first layer 14 where the liquid-absorbent core 12 is not disposed and a part of the first layer 14 where the inner sheet 20 or the outer sheet 22 is not present. Thus, the second layer 16 may be provided. The positions and the number of the first regions 30 and the fasteners 34 are determined by the user's trouble when performing the above-described disposal method of the article 10 and the reliability of the wrapping of the contaminated portion of the first layer 14 by the disposal method. Can be selected as appropriate.

  As shown in FIGS. 10 and 11, the article 10 can include a fastener having a configuration different from that of the fastener 34.

  The fastener 62 shown in FIG. 10 has a mounting portion 36 fixedly attached to the first region 30 of the second layer 16, and extends from the mounting portion 36, and the second region of the second layer 16 as necessary. The fixing part 64 which can be fixed to 32 and the tab 54 fixed to the terminal of the fixing part 64 are provided. The fastener 62 is a two-fold form in which the fixing part 64 overlaps the attachment part 36 and is installed in the first region 30 and maintains the two-fold form in an unused state.

  The attachment portion 36 of the fastener 62 has the same configuration as the attachment portion 36 of the fastener 34 described above. The fixing portion 64 of the fastener 62 has substantially the same configuration as the fixing portion 38 of the fastener 34 described above except for the following points. That is, the fixing portion 64 is further extended to the opposite side of the tab 54 from the joint portion with the bent portion 36 a of the attachment portion 36. The extended portion 64a of the fixing portion 64 is fixed to the surface 16b of the first region 30 by its own pressure-sensitive adhesive layer 46 in the vicinity of the bent portion 36a. The extended portion 64a is fixed to the surface 16b at a position between the bent portion 36a and the material weakening portion 50 of the separation mechanism 48 that is closest to the bent portion 36a. The fastener 62 has a configuration in which the entire attachment portion 36 and the fixing portion 64 are made of a single adhesive tape, instead of the above-described configuration in which two strip-shaped adhesive tapes are joined together. It can also be adopted.

  In the configuration using the fastener 62 instead of the fastener 34, in the above-described disposal method of the article 10, the user applies a tensile force F2 (FIG. 4) in the longitudinal direction to the fixing portion 64 via the tab 54. Thus, the first region 30 is partially separated from the second region 32 and displaced in the direction of the arrow α (FIG. 10). At this time, the force F2 applied to the fixing portion 38 is dispersed and concentrated on both the bent portion 36a of the attachment portion 36 and the extended portion 64a of the fixing portion 64 fixed to the surface 16b of the first region 30. Therefore, the force F2 is more reliably transmitted to the second layer 16 without causing unintentional peeling of the bent portion 36a from the second layer 16. As a result, the force F2 is reliably concentrated on the portion of the material weakening portion 50 of the separation mechanism 48 that is closest to the bent portion 36a and the extended portion 64a, and the material weakening portion 50 is easily and reliably broken.

  The fastener 66 shown in FIG. 11 has a mounting portion 36 fixedly attached to the first region 30 of the second layer 16, an intermediate portion 68 extended from the mounting portion 36, and extended from the intermediate portion 68. Accordingly, a fixing portion 38 that can be fixed to the second region 32 of the second layer 16 and a tab 54 that is fixed to the end of the fixing portion 38 are provided. The fastener 66 has a tri-fold configuration in which the intermediate portion 68 overlaps the attachment portion 36 and the fixing portion 38 overlaps the intermediate portion 68. The fastener 66 is installed in the first region 30 and maintains the tri-fold shape in an unused state.

  The attachment portion 36 and the fixing portion 38 of the fastener 66 have the same configuration as the attachment portion 36 and the attachment portion 38 of the fastener 34 described above, respectively. The intermediate portion 68 has a configuration of a pressure-sensitive adhesive tape including a strip-shaped base material 70 and a pressure-sensitive adhesive layer 72 provided on one surface of the base material 70. The fastener 66 includes one strip-shaped adhesive tape that constitutes the attachment portion 36, one strip-like adhesive tape that constitutes the intermediate portion 68, and one other strip-like shape that constitutes the fixing portion 38. The adhesive tapes are sequentially joined together in the longitudinal direction.

  The intermediate portion 68 is disposed with the pressure-sensitive adhesive layer 72 facing the base material 40 of the attachment portion 36. The intermediate portion 68 is joined to the bent portion 36a of the attachment portion 36 by the pressure-sensitive adhesive layers 72 and 42 in the vicinity of one end in the longitudinal direction. The predetermined length portion 68a at the other end in the longitudinal direction of the intermediate portion 68 is bent toward the base material 70 side. The fixing portion 38 is disposed with the pressure-sensitive adhesive layer 46 facing the base material 70 of the intermediate portion 68. In the vicinity of one end in the longitudinal direction, the fixing portion 38 is formed on a portion 68a of the intermediate portion 68 bent toward the base material 70 (hereinafter referred to as a bent portion 68a) by the pressure-sensitive adhesive layers 46 and 72. Seamed. The intermediate portion 68 can be made of the same material as the attachment portion 36 and the fixing portion 38.

  In FIG. 11, between the base material 40 of the attachment portion 36 and the pressure-sensitive adhesive layer 72 of the intermediate portion 68, and between the base material 70 of the intermediate portion 68 and the pressure-sensitive adhesive layer 46 of the fixing portion 38, Each gap is formed to facilitate understanding of the structure of the fastener 66. The unused fastener 66 has a pressure-sensitive adhesive layer 72 in the intermediate portion 68 attached to the attachment portion. The pressure sensitive adhesive layer 46 of the fixing portion 38 may be attached to the substrate 40 of the intermediate portion 68, respectively. Further, the tab 54 may be disposed on the base material 70 of the intermediate portion 68 as illustrated, or may be disposed so as to protrude outward from the intermediate portion 68.

  The fastener 66 is installed in the first region 30 of the second layer 16 with the bent portion 36 a of the attachment portion 36 facing the side away from the material weakening portion 50 of the separation mechanism 48. The bent portion 68a of the intermediate portion 68 is located on the side opposite to the bent portion 36a of the attachment portion 36, and the tab 54 is located on the same side as the bent portion 36a of the attachment portion 36, that is, on the side away from the material weakening portion 50. To do. In addition, instead of the above-described configuration in which the fastener 66 is produced by joining three strip-shaped adhesive tapes together, the attachment part 36, the intermediate part 68, and the fixing part 38 are made entirely from one adhesive tape. It is also possible to adopt a configuration to be used.

  In the configuration in which the fastener 66 is used instead of the fastener 34, in the above-described disposal method of the article 10, the user first picks the tab 54 and sticks it to the intermediate portion 68 with the pressure-sensitive adhesive layer 46. A force F1 (FIG. 3) can be applied to the fixing portion 38 so that the fixing portion 38 is gradually peeled off from the intermediate portion 68. Next, when the user applies a tensile force F2 (FIG. 4) in the longitudinal direction to the fixing portion 38 via the tab 54, the intermediate portion 68 attached to the attachment portion 36 by the pressure-sensitive adhesive layer 72 is attached. The part 36 is gradually peeled off. When substantially the entire intermediate portion 68 is peeled off from the attachment portion 36, the force F2 is transmitted to the attachment portion 36 via the intermediate portion 68 and also to the second layer 16 via the attachment portion 36. . This force F2 concentrates on the portion of the material weakening portion 50 of the separation mechanism 48 that is closest to the mounting portion 36, and gradually breaks the material weakening portion 50 starting from the portion. As a result, the first region 30 is partially separated from the second region 32 and displaced in the direction of the arrow α (FIG. 11). When the entire material weakening portion 50 is broken, the first region 30 is folded back and expanded with respect to the second region 32 so as to be separated from the first layer 14 in the same manner as the form shown in FIG. It can extend outward beyond the outer edge.

  In the configuration using the three-fold fastener 66, the bent portion 36a of the attachment portion 36 is disposed on the side away from the material weakening portion 50 as described above. Therefore, unlike the configuration shown in FIGS. 4 and 10, the force F <b> 2 applied to the fixing portion 38 is applied to a portion corresponding to the bottom of the U-shape of the material weakening portion 50 via the intermediate portion 68 and the attachment portion 36. In some cases, the breakage may start from other parts of the material weakening portion 50 without necessarily concentrating. Even in such a case, the entire material weakening portion 50 can be broken by continuously applying the force F <b> 2 to the fixing portion 38.

  Similarly to the fixing portion 64 of the fastener 62 described above, the intermediate portion 68 of the fastener 66 is an extended portion that is further extended from the joint portion with the bent portion 36a of the attachment portion 36 to the opposite side of the bent portion 68a ( (Not shown). The extended portion of the intermediate portion 68 is fixed to the surface 16b of the first region 30 by its own pressure sensitive adhesive layer 72 in the vicinity of the bent portion 36a. According to this configuration, similarly to the case where the fastener 62 is used, the material weakening portion 50 is easily and reliably broken in the above-described disposal method of the article 10.

  Compared with the tri-fold type fastener 66, the double-fold type fasteners 34 and 62 can reduce the material cost because a small amount of material is used for the fasteners 34 and 62. Further, the bi-folded fasteners 34, 62 have several advantages associated with the manufacturing process of the article 10. Hereinafter, with reference to FIG. 12 and FIG. 13, an example of a manufacturing process of the article 10 including the two-folded fastener 34 shown in FIG. 1 will be described. FIG. 12A shows an example of a manufacturing apparatus for the fastener 34. FIG. 12B is an end view of the laminated tape constituting the fastener 34. FIG.12 (c) shows the laminated tape which comprises the fastener 34 in the state wound around the roll. FIG. 13 shows an example of an apparatus for manufacturing the article 10.

  As illustrated in FIG. 12A, the manufacturing apparatus for the fastener 34 (FIG. 1) includes a tape feeding unit 80, a laminating unit 82, and a tape winding unit 84. The tape feeding unit 80 includes a roll of a long adhesive tape 36T constituting the attachment part 36 (FIG. 1), a roll of a long adhesive tape 38T constituting the fixing part 38 (FIG. 1), and a tab 54. A roll of a long tape 54T constituting (FIG. 1) is installed. As shown in FIG. 12B, the adhesive tape 36T is composed of a long base material 40T and a pressure-sensitive adhesive constituting the base material 40 (FIG. 1) and the pressure-sensitive adhesive layer 42 (FIG. 1) of the mounting portion 36. It has an agent layer 42T. The adhesive tape 38T has a long base material 44T and a pressure sensitive adhesive layer 46T constituting the base material 44 (FIG. 1) and the pressure sensitive adhesive layer 46 (FIG. 1) of the fixing portion 38. The outer surface of the base materials 40T and 44T opposite to the pressure-sensitive adhesive layers 42T and 46T is preliminarily subjected to a peeling process.

  The adhesive tape 36T, the adhesive tape 38T, and the tape 54T individually fed from the respective rolls of the tape feeding unit 80 are laminated to each other in the form of FIG. In the laminate portion 82, the tape 54T is continuously attached to the pressure-sensitive adhesive layer 46T along one side edge extending in the longitudinal direction of the adhesive tape 38T. On the other hand, a bent portion 36aT constituting the bent portion 36a (FIG. 1) of the attachment portion 36 is formed along one side edge extending in the longitudinal direction of the adhesive tape 36T. Next, the adhesive tape 38T to which the tape 54T is attached is continuously attached by the pressure-sensitive adhesive layers 42T and 46T along the bent portion 36aT of the adhesive tape 36T. In this way, a long laminated tape 34T constituting the fastener 34 is produced (FIG. 12B). The laminated tape 34T is manufactured in a state where the pressure-sensitive adhesive layer 46T of the adhesive tape 38T is attached to the base material 40T of the adhesive tape 36T.

  The laminated tape 34T produced in the laminate part 82 is continuously sent to the winding part 84 in the laminated state. In the winding unit 84, the laminated tape 34T is wound on a roll with the pressure-sensitive adhesive layer 42T of the adhesive tape 36T facing inward. As a result, the web-shaped laminated tape 34T shown in FIG. The laminated tape 34T is stored, transported, etc. in a form wound in a web shape.

An example of the dimensions of the laminated tape 34T produced by the above process is as follows. In FIG. 12B, D1 = about 60 mm, D2 = about 50 mm, D3 = about 5 mm, D4 = about 2 mm, D5 = about 7 mm. The base materials 40T and 44T have a thickness of about 80 μm, and the pressure-sensitive adhesive layers 42T and 46T have a basis weight of about 35 g / m ² .

  As illustrated in FIG. 13, the apparatus for manufacturing the article 10 includes a laminated tape feeding unit 86, a laminated tape cutting unit 88, and a fastener applying unit 90. The laminated tape 34T installed in the laminated tape feeding unit 86 in a web-like form is continuously fed out in a posture in which the pressure-sensitive adhesive layer 42T of the pressure-sensitive adhesive tape 36T faces upward from the web-like state. It is. The fed laminated tape 34T is cut at a position CP at a predetermined distance in the longitudinal direction from the tip in the feed direction at the laminated tape cutting portion 88. Thereby, the fastener 34 is produced.

  An attachment roller 94 having a temporary holding surface 92 by vacuum suction or the like is provided on the outer peripheral surface of the fastener attaching portion 90 provided on the downstream side in the tape feeding direction of the laminated tape cutting portion 88. The fastener 34 cut from the laminated tape 34T is temporarily held on the temporary holding surface 92 of the sticking roller 94 with the pressure-sensitive adhesive layer 42T facing upward.

  In the fastener pasting portion 90, a sheet material 18M having a laminated structure constituting the article main body 18 (FIG. 1) is provided on the opposite side of the sticking roller 94 from the side facing the laminated tape cutting portion 88. The surface 16bM constituting the outer surface 16b (FIG. 1) of the layer 16 is continuously supplied in a posture in which the surface 16bM is in contact with the temporary holding surface 92 of the sticking roller 94. The sticking roller 94 is rotationally driven at a predetermined angular velocity, and the sheet material 18M is fed in the tangential direction of the sticking roller 94 at a speed corresponding to the tangential speed of the sticking roller 94. The fastener 34 temporarily held on the temporary holding surface 92 of the sticking roller 94 gradually contacts the surface 16bM of the sheet material 18M as the sticking roller 94 rotates. When the temporary holding surface 92 of the sticking roller 94 has a vacuum suction function, the vacuum suction function is canceled when the pressure-sensitive adhesive layer 42 of the fastener 34 starts to contact the surface 16bM of the sheet material 18M. As a result, the fastener 34 moves to the surface 16bM of the sheet material 18M and is fixed at a predetermined position. At this time, a predetermined pressure for fixing the pressure-sensitive adhesive layer 42 of the fastener 34 to the surface 16bM can be applied between the temporary holding surface 92 of the sticking roller 94 and the surface 16bM of the sheet material 18M. .

  The sheet material 18M in which the fastener 34 is fixed to the surface 16bM is sent to a subsequent process such as cutting, molding, and sealing. In this way, the article 10 including the fastener 34 and the separation mechanism 48 is manufactured.

  In the above-described manufacturing process, the bi-folded fastener 34 is thinner than the tri-folded fastener 66, so that the outer diameter of the roll when the laminated tape 34T is wound in a web shape is the same length. This can be made smaller than the outer diameter of the roll when the three-fold laminated tape (not shown) is wound into a web shape. That is, when the roll outer diameter is the same, the laminated tape 34T longer than the three-fold laminated tape can be wound in a web shape. Therefore, under the restriction of the maximum roll diameter that can be installed in the laminated tape feeding unit 86, a roll of the laminated tape 34T that is longer than the three-fold laminated tape can be installed in the laminated tape feeding unit 86. As a result, in the manufacturing process of the article 10, the replenishment frequency of the roll of the laminated tape 34 </ b> T installed in the laminated tape feeding unit 86 can be reduced, and the number of work interruptions required for the replenishment can be reduced. The number can be increased. Further, since the replenishment frequency of the laminated tape 34T is reduced, the number of times of joining the rear end of the preceding laminated tape 34T and the front end of the succeeding laminated tape 34T can be reduced, improving workability and joining. Yield deterioration due to problems such as the above can be prevented. Thus, with the configuration using the clasp 34 in the form of two folds, the productivity of the article 10 can be improved and the manufacturing cost can be reduced.

  In the above-described disposal method of the article 10, the amount of force required for tearing the material weakening portion 50 made of a perforation and partially separating the first region 30 from the second region 32 (that is, ease of separation) is set. In connection with the structure of the material weakening part 50, it verified by the following experiments.

  For each of the four types of articles 10 having the material weakening portion 50 shown in FIGS. 7A to 7D, the above-described partial separation step of the first region 30 from the second region 32 (FIGS. 3 to 5). ) To measure the maximum value of the force F2 (FIG. 4). Here, as the four types of articles 10, the same structure pant diaper (FIG. 2) was used, and the fastener 34 having the same structure was installed on the abdomen 58 or the back part 60 of the article body 18. The shortest distance dmin (FIG. 7A) between the material weakening portion 50 and the bent portion 36a of the fastener 34 is the same (about 5 mm). The material weakening part 50 was comprised from the perforation 50B (FIG.8 (b)) of all the same structures.

  For the four types of articles 10 having the above-described configuration, after fixing the fixing portion 38 of the fastener 34 away from the attachment portion 36 (FIG. 3), the tensile tester (Orientec Co., Ltd. RTG-1225) A force F2 in the longitudinal direction is applied to the fixing portion 38 to gradually break the material weakening portion 50 (FIG. 4), and the first region 30 is folded back and expanded with respect to the second region 32 (FIG. 5). ), The maximum value of the force F2 was measured. The measurement results are shown in Table 1.

  Moreover, regarding the article 10 having the material weakening portion 50 shown in FIGS. 7A and 7C among the four kinds of articles 10, the area of the first region 30 with respect to the area in the plan view of the article body 18 shown in the figure. What changed the ratio (namely, area ratio) was prepared, and the maximum value of force F2 was measured by the method similar to the above with respect to each. The measurement results are shown in Table 2. In addition, the maximum distance dmax (FIG. 7 (a)) between the fastener 34 and the material weakening part 50 installed in the 1st area | region 30 of each area ratio is appended. For reference, the area ratio and the maximum distance dmax of the first region 30 in the article 10 in FIG.

  Further, in each of the above four types of articles 10, the dimension of the perforation 50B (the relationship between the perforation length L1 (FIG. 8) and the interval L2 between adjacent perforations (FIG. 8)) is changed, and the material weakening portion 50 is changed. It was determined by a tensile test similar to the above whether the first region 30 could be partially separated from the second region 32 by tearing. The determination results are shown in Table 3.

The following items were verified from the results of each experiment described above.
The magnitude of the force F2 required to tear the material weakening portion 50 composed of the perforation 50B and partially separate the first region 30 from the second region 32 is, for example, about 0 regardless of the configuration of the material weakening portion 50. .5N or more and about 5N or less, for example, about 1N or more and about 4N or less. If the force F <b> 2 exceeds about 5 N, it may be difficult to partially separate the first region 30 from the second region 32 along the material weakening portion 50. When the force F2 is less than about 0.5 N, the material weakening portion 50 may break unintentionally during normal use, not when the article 10 is discarded.

  The force F2 within the above range can be appropriately adjusted by selecting the area ratio of the first region 30 and the size of the perforation 50B. Here, the area ratio of the first region 30 can be, for example, about 5% or more and about 90% or less, for example, about 5% or more and about 70% or less, regardless of the configuration of the material weakening portion 50. Can be. If the fastener 34 has the same structure, the maximum distance dmax between the fastener 34 and the material weakening portion 50 increases as the area ratio of the first region 30 increases, but dmax is, for example, about 5 mm or more, It can be about 100 mm or less, for example, about 5 mm or more and about 30 mm or less. The smaller the area ratio of the first region 30, the smaller the required force F <b> 2, and the required force F <b> 2 increases as the area ratio of the first region 30 increases.

  Of the dimensions of the perforation 50B, the perforation interval L2 can be, for example, about 0.5 mm or more and less than about 2 mm, and can be, for example, about 0.5 mm or more and less than about 1.5 mm. When the distance L2 is about 2 mm or more, it becomes difficult to tear the perforation 50B and partially separate the first region 30 from the second region 32 even if the perforation length L1 is increased. The smaller the perforation interval L2, the smaller the required force F2, and the greater the perforation interval L2, the greater the required force F2.

DESCRIPTION OF SYMBOLS 10 Disposable absorbent article 12 Liquid absorbing core 14 1st layer 16 2nd layer 18 Article main body 20 Inner sheet 22 Outer sheet 30 1st area | region 32 2nd area | region 34, 62, 66 Fastener 36 Attachment part 38, 64 Adhering part 48 Separating mechanism 50 Material weakening part 52 Adhesive strength reducing part 54 Tab 56 Crotch part 58 Abdomen 60 Back part 68 Intermediate part

Claims (8)

A first layer having an absorbent core;
A liquid impermeable second layer covering the first layer, the second layer having a first region and a second region adjacent to each other;
A fastener installed in the first region of the second layer;
A separation mechanism that allows the first region of the second layer to be partially separated from the second region by an external force applied to the fastener.
Disposable absorbent article.   The fastener includes an attachment portion fixedly attached to the first region and a fixing portion extending from the attachment portion, and the first region is formed in a two-fold form in which the fixing portion overlaps the attachment portion. The disposable absorbent article according to claim 1, installed in   The disposable absorbent article according to claim 1 or 2, wherein the fastener has a tab that can receive a tensile force as the external force at an end.   The said separation mechanism has a material weakening part formed in the boundary of the said 1st area | region and the said 2nd area | region, and enabling tearing of the said 2nd layer by the said external force. The disposable absorbent article according to Item.   The second layer is bonded to the first layer, and the separation mechanism has an adhesive force that lowers the adhesive force of the second layer to the first layer in the first region than in the second region. The disposable absorbent article according to any one of claims 1 to 4, comprising a reduction part.   The disposable absorbent article is a diaper, and the first layer and the second layer are extended from the crotch part, an abdomen extending from the crotch part, and the crotch part opposite to the abdomen. The disposable absorbent article according to claim 1, further comprising a back portion, wherein the first region is provided on at least one of the abdomen and the back portion.   The disposable absorbent article according to claim 6, wherein the first region is continuously provided in the abdomen, the back, and the crotch.   The disposable absorbent according to any one of claims 1 to 7, comprising one or more first regions and one or more fasteners installed in the one or more first regions. Goods.

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