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EP-4385478-B1 - DISPOSABLE DIAPER

EP4385478B1EP 4385478 B1EP4385478 B1EP 4385478B1EP-4385478-B1

Inventors

  • OSHIMA, Aya

Dates

Publication Date
20260513
Application Date
20220301

Claims (4)

  1. A disposable diaper (1) comprising: a diaper body (10) that comprises a front surface sheet (11), a back surface sheet (12), and an absorber (13) disposed between the front surface sheet (11) and the back surface sheet (12), the diaper body (10) extending from a backside portion (10X) of the diaper body (10) to an abdominal side portion (10Z) of the diaper body (10); a side flap (17) that is provided in each of side portions of the backside portion (10X), the side flap (17) extending outward beyond the absorber (13) in a width direction (E) of the diaper body (10); and a fastening tape (20) that is provided in the side flap (17) to be fastened to the abdominal side portion (10Z) when the diaper body (10) is used; wherein the fastening tape (20) comprises: a fixed portion (21) that is fixed to the side flap (17) ; and a protruding piece (22) that extends outward from the fixed portion (21) in the width direction (E); wherein the fixed portion (21) has a rectangular shape in a plan view and extends in an extending direction (D) of the diaper body (10), wherein the protruding piece (22) is formed by partially extending an outer edge (21a) of the fixed portion (21) outwardly in the width direction, wherein the protruding piece (22) protrudes from the side flap (17) to a side of the diaper body (10), wherein the fixed portion (21) comprises a notch (30) in a lower region (α) of the fixed portion (21) that is closer to a leg side of a wearer (P) than the protruding piece (22), the notch (30) being recessed from an outer edge (21a) in the width direction (E) toward an inner side in the width direction (E), wherein the notch (30) is formed in a position that is continuous from a lower end (22b) of the protruding piece (22), wherein the lower region (α) corresponds to a region lower than the position of the fixed portion (21) from which the protruding piece (22) protrudes, wherein the fixed portion (21) comprises a non-fixed region (R1) that is not fixed to the side flap (17), and the non-fixed region (R1) extends from the notch (30) to an inner edge (21b) of the fixed portion (21) in the width direction (E) and extends obliquely downward through the lower region (α).
  2. The disposable diaper (1) according to claim 1, wherein the protruding piece (22) comprises a mark (25) on an outer edge (22a) of the protruding piece (22) in the width direction (E), the mark (25) being held when the diaper body (10) is attached to the wearer (P), and the notch (30) is provided in a position facing the mark (25) with the protruding piece (22) therebetween.
  3. The disposable diaper (1) according to claim 1 or 2, wherein the side flap (17) is formed by laminating the front surface sheet (11) and the back surface sheet (12), and comprises a non-adhesion region (R2) where the front surface sheet (11) is not bonded to the back surface sheet (12), and the non-adhesion region (R2) extends from a position where the notch (30) overlaps in a direction passing through the lower region (α) of the fixed portion (21).
  4. The disposable diaper (1) according to any one of claims 1 to 3, wherein the fixed portion (21) comprises a fragile structure (40) at a periphery of the notch (30), the fragile structure (40) suppressing rigidity of the fastening tape (20).

Description

TECHNICAL FIELD The present invention relates to a disposable diaper. BACKGROUND A disposable diaper with fastening tapes that fasten a backside portion and an abdominal side portion of a diaper body at the time of wearing the diaper is known (see, for example, Patent Literatures 1 to 7). Here, in a conventional disposable diaper, a diaper body includes a side flap on each side of a backside portion, and each fastening tape includes a fixed portion fixed to the side flap and a protruding piece extending from the fixed portion to an outside of the diaper body in a width direction. In addition, Patent Literatures 1 and 2 disclose a configuration in which a cutout or notch is formed in the fixed portion, wherein the notch is recessed from an inside edge of the diaper body in the width direction toward an outside in the width direction. Furthermore, Patent Literature 3 discloses a configuration in which the fixed portion extends below the protruding piece (toward a leg side of a wearer). CITATION LIST Patent Literature Patent Literature 1: JP 2010-136788 APatent Literature 2: JP 2012-120663 APatent Literature 3: JP 2021-074077 APatent Literature 4: JP2013172814APatent Literature 5: WO2019230331Patent Literature 6: JP201763942APatent Literature 7: JP2014111042A SUMMARY Technical Problem Meanwhile, the fixed portion of the fastening tape disclosed in Patent Literatures 1 and 2 does not extend below the protruding piece (toward the leg side of the wearer). Therefore, when the backside portion and the abdominal side portion are tied together, a force that acts on a lower portion of the side flap is weakened to reduce the fit of the diaper body around the legs. Furthermore, in the fastening tape disclosed in Patent Literature 3, the fixed portion extends below the protruding piece (toward the leg side of the wearer). This extension of the fixed portion increases the rigidity of a part of the side flap that is lower than the protruding piece. Therefore, when the backside portion and the abdominal side portion are fastened together, and the lower portion of the side flap is not deformed properly, which reduces the fit of the diaper body around the legs. In view of the above, it is an object of the present invention to provide a disposable diaper capable of improving the fit of a diaper body around the legs. Solution to Problem To achieve the object described above, a disposable diaper of the present invention includes a diaper body that includes a front surface sheet, a back surface sheet, and an absorber disposed between the front surface sheet and the back surface sheet, the diaper body extending from a backside portion of the diaper body to an abdominal side portion of the diaper body; a side flap that is provided in each of side portions of the backside portion, the side flap extending outward beyond the absorber in a width direction of the diaper body; and a fastening tape that is provided in the side flap to be fastened to the abdominal side portion when the diaper body is used. The fastening tape includes a fixed portion that is fixed to the side flap; and a protruding piece that extends outward from the fixed portion in the width direction. The fixed portion includes a notch in a lower region of the fixed portion that is closer to a leg side of a wearer than the protruding piece, the notch being recessed from an outer edge in the width direction toward an inner side in the width direction. Advantageous Effects The disposable diaper of the present invention configured as described above can improve the fit of the diaper body around the legs. BRIEF DESCRIPTION OF DRAWINGS Fig. 1 is an external perspective view illustrating the state of use of a disposable diaper in Example 1.Fig. 2 is a plan view illustrating the disposable diaper in Example 1.Fig. 3 is an enlarged view of a portion A in Fig. 2.Fig. 4 is an enlarged view of a portion B in Fig. 3.Fig. 5 is an explanatory diagram illustrating wrinkles generated by the use of the disposable diaper in Example 1.Fig. 6 is an enlarged view illustrating a principal portion of the disposable diaper in Example 2.Fig. 7 is an enlarged view of a principal portion illustrating a variation of the disposable diaper in Example 2.Fig. 8 is an enlarged view of a principal portion illustrating a first variation of a disposable diaper. DESCRIPTION OF EMBODIMENTS A disposable diaper according to the present invention is described with reference to Examples 1 and 2 illustrated in the drawings. Example 1 A disposable diaper 1 of Example 1 is a diaper that is attached to a wearer P by a caregiver. As illustrated in Fig. 1, at the time of use of the disposable diaper 1, the wearer P is covered with a diaper body 10 from his or her back through a crotch to his or her abdomen. As illustrated in Fig. 2, the disposable diaper 1 includes the diaper body 10 and fastening tapes 20. The diaper body 10 includes a backside portion 10X, a crotch portion 10Y, and an abdominal side portion 10Z. The