JP5868105B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper.

  A pants-type disposable diaper having a waist opening and a pair of leg openings, comprising a front part, a rear part and a crotch part, and when the diaper is deployed, the front part and the rear part are vertically The crotch portion extends longitudinally in the transverse intermediate position and is joined to the front portion and the rear portion, respectively, and the side edge region of the front portion and the side edge region of the rear portion are joined together to form a pants shape. Disposable diapers are known (see Patent Document 1). In this diaper, the crotch portion and the lower edge region of the front portion are not partially bonded, and the crotch portion and the lower edge region of the rear portion are not partially bonded. As a result, the crotch portion is easily deformed during wearing, and the wearing of the pant-type diaper is facilitated.

JP 2008-194161 A

  However, in the above-mentioned diaper, the crotch portion is not partially joined to the lower edge region of the front portion and the lower edge region of the rear portion, respectively. As a result, urine or feces may leak out of the diaper.

  According to the present invention, there is provided a pants-type disposable diaper having one waistline opening and a pair of leghole openings, each leghole region defining the leghole openings having stretchability or stretchability. A front part, a rear part and a crotch part, and when the diaper is deployed, the front part and the rear part are separated from each other in the vertical direction, and the crotch part extends in the longitudinal direction at the intermediate position in the transverse direction and the rear part and the rear part. It is joined to the side part through the front joining area and the rear joining area, respectively, and the side edge area of the front part and the side edge area of the rear part are joined together to form a pants-type disposable diaper, Side elastic members are respectively attached in a stretched state along both side edge regions, and at least one of the front side joining region and the rear side joining region is provided around both longitudinal ends of the crotch portion. A wide region extending to the body, provided between the wide area between, than the wide region and a narrow region of the narrow transversely disposable diaper is provided.

  Leakage of urine or feces outside the diaper can be suppressed.

It is an expanded view of the disposable diaper of the Example by this invention. It is a cross-sectional view of the crotch portion in the transverse direction. It is the schematic which shows the diaper at the time of wear. It is an expanded view of the disposable diaper of another Example by this invention. It is an expanded view of the disposable diaper of another Example by this invention. It is sectional drawing similar to FIG. 2 which shows another example of a crotch part.

  Referring to FIG. 1, a pants-type disposable diaper 1 includes a front portion 4F, a rear portion 4B, and a crotch portion 4C. In FIG. 1, L indicates the longitudinal direction of the diaper 1, and T indicates the transverse direction orthogonal to the longitudinal direction.

  In the example shown in FIG. 1, the front portion 4F and the rear portion 4B each have a rectangular shape, and are spaced apart from each other in the longitudinal direction L when the diaper is developed.

  A front upper elastic member 5FU is attached to the front portion 4F in an extended state along the upper edge region 4FU, and a front lower elastic member 5FL is attached in an extended state along the lower edge region 4FL. Similarly, the rear upper elastic member 5BU is attached to the rear portion 4B along the upper edge region 4BU in an extended state, and the rear lower elastic member 5BL is attached to the rear portion 4B in an extended state along the lower edge region 4BL. . Each of the front upper elastic member 5FU, the front lower elastic member 5FL, the rear upper elastic member 5BU, and the rear lower elastic member 5BL is composed of one or more thread-like elastic members extending substantially in the transverse direction T.

  The front portion 4F and the rear portion 4B each include two liquid-impermeable sheets that are stacked on each other, and the elastic members 5FU, 5FL, 5BU, and 5BL are stretched between two corresponding liquid-impermeable sheets, respectively. And are joined to these sheets.

  In the example shown in FIG. 1, the middle region 4FI between the front lower elastic member 5FL and the front upper elastic member 5FU in the front portion 4F, and the rear upper elastic member 5BU and the rear lower portion in the rear portion 4B. No elastic member is provided in each intermediate region 4BI between the elastic members 5BL.

Each of the front side portion 4F and the rear side portion 4B can be made of a non-stretchable or stretchable nonwoven fabric sheet, a plastic sheet, or the like. Specifically, for example, a spunbond nonwoven fabric, a point bond nonwoven fabric, an SMS (spunbond / meltblown / spunband) nonwoven fabric, a liquid-impervious plastic film having a basis weight in a range of about 10 to 40 g / m ² , and the like Laminate or the like can be used. As the stretchable sheet, for example, a nonwoven fabric made of stretchable fibers obtained by melting a thermoplastic elastomer resin such as urethane or styrene can be used.

  The crotch portion 4C has a rectangular shape, extends in the longitudinal direction L, and is joined to the front side portion 4F and the rear side portion 4B via the front side joining region 6F and the rear side joining region 6B, respectively, at the intermediate position in the transverse direction.

  The front joint region 6F is provided between the wide regions 6FW and 6FW, and a wide region 6FW extending around substantially the entire transverse direction T of the crotch portion 4C provided around both ends in the longitudinal direction L of the front joint region 6F. In addition, the wide regions 6FW and 6FW include a narrow region 6FN narrower in the transverse direction T than the wide regions 6FW. In the example shown in FIG. 1, the wide region 6FW is located around the front edge region 4CF of the crotch portion 4C and around the lower edge region 4FL of the front side portion 4F. In the example shown in FIG. 1, the narrow region 6FN continuously extends in the vertical direction L between the pair of wide regions 6FW and 6FW. As a result, a non-joined region 7F in which the crotch portion 4C and the front portion 4F are not joined to each other is formed. These non-joining regions 7F are partially surrounded by the wide regions 6FW and 6FW and the narrow region 6FN.

  The front upper elastic member 5FU overlaps the front joint region 6F, particularly the wide region 6FW closer to the upper edge region 4FU of the front portion 4F, and the front lower elastic member 5FL is the front joint region 6F, particularly the lower edge of the front portion 4F. It overlaps with the wider region 6FW closer to the region 4FL.

  The rear joining region 6B is provided between the wide regions 6BW and 6BW, and a wide region 6BW extending around substantially the entire transverse direction T of the crotch portion 4C provided around both ends in the longitudinal direction L of the rear joining region 6B. Wide regions 6BW, 6BW, and narrow regions 6BN that are narrower in the transverse direction T than the wide regions 6BW, 6BW. In the example shown in FIG. 1, the wide area 6BW is located around the rear edge area 4CB of the crotch part 4C and around the lower edge area 4BL of the rear side part 4B. In the example shown in FIG. 1, the narrow region 6BN continuously extends in the vertical direction L between the pair of wide regions 6BW, 6BW. As a result, a non-joined region 7B is formed in which the crotch portion 4C and the rear portion 4B are not joined to each other. These non-joining regions 7B are partially surrounded by the wide regions 6BW and 6BW and the narrow region 6BN.

  The rear upper elastic member 5BU overlaps the rear joint region 6B, in particular, the wide region 6BW closer to the upper edge region 4BU of the rear portion 4B, and the rear lower elastic member 5BL overlaps the rear joint region 6B, particularly the rear. It overlaps with the wide region 6FW closer to the lower edge region 4BL of the side portion 4B.

  In the example shown in FIG. 1, the wide areas 6FW and 6BW are rectangular. That is, the transverse lengths of the wide regions 6FW and 6BW are substantially constant along the longitudinal direction L.

  The front side joining region 6F and the rear side joining region 6B are made of, for example, a hot melt adhesive.

  As shown in FIG. 2, the crotch portion 4C includes, for example, a liquid permeable top sheet 4CTS, a liquid impermeable back sheet 4CBS, and an absorbent body held between the top sheet 4CTS and the back sheet 4CBS. 4CA and a pair of side flaps 4CSF and 4CSF extending in the longitudinal direction L on both sides of the absorber 4CA. Absorbent body 4CA includes an absorbent core comprising, for example, one or both of a fiber assembly and superabsorbent polymer particles. The fiber assembly is composed of, for example, one or both of pulverized pulp and thermoplastic synthetic fiber. Absorbent body 4CA may include a wrap sheet that wraps the absorbent core. In the example shown in FIG. 1, the side flaps 4CSF and 4CSF are formed integrally with the back seat 4CBS. You may form a side flap from a back seat and another member.

  As shown in FIG. 1, side elastic members 5CS are attached to the crotch portion 4C in a stretched state along both side edge regions 4CS and 4CS, and each side flap 4CSF is flapped along its longitudinal direction. The elastic member 5CSF is attached in an extended state. Each of the side elastic member 5CS and the flap elastic member 5CSF is composed of one or more thread-like elastic members extending substantially in the longitudinal direction L.

  The crotch portion 4C has a front surface 4CFF facing the wearer and a back surface 4CBF facing the front side portion 4F and the rear side portion 4B. The side elastic member 5CS is disposed so as to be adjacent to the back surface 4CBF of the crotch portion 4C rather than the front surface 4CFF of the crotch portion 4C. Further, the side elastic member 5CS and the flap elastic member 5CSF are respectively a front upper elastic member 5FU and a front lower elastic member 5FL of the front portion 4F, and a rear upper elastic member 5BU and a rear lower elastic member of the rear portion 4B. It arrange | positions so that 5BL may be crossed.

  The back sheet 4CBS and the side flaps 4CSF and 4CSF include two non-woven fabrics stacked on each other and a liquid-impermeable sheet such as a thermoplastic sheet disposed between the non-woven fabrics. The side elastic member 5CS and the flap elastic member 5CSF described above are held between these nonwoven fabrics.

  The side flaps 4CSF and 4CSF stand up from the absorbent body 4CA during use and function as leak-proof members.

  As shown in FIG. 1, the front side portion 4F and the rear side portion 4B each have side edge regions 4FS, 4BS extending in the longitudinal direction L, and these side edge regions 4FS, 4BS are joined to each other. As a result, as shown in FIG. 3, a pant-type diaper 1 having one waistline opening 1W and a pair of leghole openings 1L, 1L is formed. In addition, the front side part 4F, the rear side part 4B, and the crotch part 4C are respectively positioned on the stomach side, the back side, and the crotch side of the wearer W when worn.

  That is, one waistline opening 1W is defined by the upper edge region 4FU of the front portion 4F and the upper edge region 4BU of the rear portion 4B. Further, on one side of the crotch portion 4C, a lower edge region 4FL of the front portion 4F and a lower edge region 4BL of the rear portion 4B, and a side edge region 4CS of the crotch portion 4C between the lower edge regions 4FL and 4BL are provided. , One leg opening 1L is defined. Similarly, on the other side of the crotch portion 4C, the lower edge region 4FL of the front portion 4F and the lower edge region 4BL of the rear portion 4B, and the side edge region 4CS of the crotch portion 4C between these lower edge regions 4FL, 4BL Defines the other leg opening 1L.

  In other words, in the example shown in FIGS. 1 to 3, the leg area defining the leg openings 1L, 1L is the lower edge area 4FL and the rear part 4B of the front part 4F located on one side of the crotch part 4C. A lower edge region 4BL of the crotch portion 4C located between the lower edge regions 4FL and 4BL, a lower edge region 4FL and a rear portion 4B of the front portion 4F located on the other side of the crotch portion 4C. The lower edge region 4BL and the side edge region 4CS of the crotch portion 4C located between the lower edge regions 4FL and 4BL are included. In addition, these leg regions have elasticity or stretchability by the front lower elastic member 5FL, the rear lower elastic member 5BL, and the side elastic member 5CS. Since the side elastic member 5CS intersects the front lower elastic member 5FL and the rear lower elastic member 5BL, the front lower elastic member 5FL, the rear lower elastic member 5BL, and the side elastic member 5CS are ring-shaped. It is continuous.

  Moreover, in the example shown in FIGS. 1 to 3, the diaper 1 is a boxer shorts type. That is, the diaper 1 extends downward to the wearer's thigh WT over the wearer's W or crotch WC when worn.

  As a result, the diaper 1 is brought into close contact with the thigh WT around the leg openings 1L, 1L. Accordingly, leakage of urine and feces from the leg openings 1L and 1L can be suppressed.

  As a result, the space between the wearer W and the diaper 1 can be used as a holding space for temporarily holding urine or the like. The urine held in the holding space is then absorbed by the absorber 4CA.

  In addition, in the example shown in FIG. 1, non-joining regions 7F and 7B are provided between the front portion 4F and the rear portion 4B and the crotch portion 4C. As a result, the above-described holding space is expanded by these non-joining regions 7F and 7B. Therefore, leakage of urine or the like can be reliably suppressed.

  Further, in the example shown in FIG. 1, the non-joining regions 7F and 7B are provided in the intermediate regions 4FI and 4BI in which no elastic member is provided. As a result, the portion of the front portion 4F and the portion of the rear portion 4B located in the non-joining regions 7F and 7B are not biased toward the wearer W, so that urine or the like is constituted by the non-joining regions 7F and 7B. Can easily flow into the holding space.

  In the example shown in FIG. 1, the side elastic member 5CS is provided on the crotch portion 4C so as to be adjacent to the back surface 4CBF of the crotch portion 4C rather than the front surface 4CFF of the crotch portion 4C. These side elastic members 5CS mainly act to pull up the crotch portion 4C, particularly the absorbent body 4CA, toward the wearer during use. As a result, even when the weight of the absorber 4CA is increased due to absorption of urine, it is promoted that the crotch portion 4C, particularly the absorber 4CA keeps in close contact with the wearer, and therefore, the leakage is further reliably suppressed. . In this sense, the side elastic member 5CS is different in nature from the flap elastic member 5CSF.

  In use, the legs of the wearer W are passed through the leg openings 1L and 1L, and the diaper 1 is pulled up. In this case, since the non-joining regions 7F and 7B are provided, the crotch portion 4C can be relatively easily deformed with respect to the front side portion 4F and the rear side portion 4B. Therefore, the diaper 1 can be easily pulled up.

  Further, since the front lower elastic member 5FL of the front portion 4F and the rear lower elastic member 5BL of the rear portion 4B intersect the side elastic member 5CS of the crotch portion 4C, the crotch portion 4C is expanded in the transverse direction T. . As a result, the formation of undesirable wrinkles on the crotch portion 1 is suppressed. Therefore, since the absorption surface of absorber 4CA can be maintained widely, absorption of urine into absorber 4CA is promoted.

  FIG. 4 shows another embodiment according to the present invention. In FIG. 4, illustration of the side flap 4SF, the side elastic member 5CS, and the flap elastic member 5CSF of the crotch portion 4C is omitted.

  In the example shown in FIG. 4, the wide region 6FW closer to the upper edge region 4FU of the front side portion 4F in the front side joining region 6F is tapered toward the narrow region 6FN. That is, the length in the transverse direction of the wide area 6FW closer to the upper edge area 4FU becomes shorter as it approaches the narrow area 6FN. Similarly, the wide area 6BW closer to the upper edge area 4BU of the rear portion 4B in the rear side bonded area 6B is tapered toward the narrow area 6BN. That is, the length in the transverse direction of the wide region 6BW closer to the upper edge region 4BU becomes shorter as it approaches the narrow region 6FN.

  Further, in the example shown in FIG. 4, the front upper elastic member 5FU includes a break region 5FUI that suspends at an intermediate position in the transverse direction T, and the front joint region 6F, particularly the upper edge region of the front portion 4F, on both sides of the break region 5FUI. It overlaps with the wider region 6FW closer to 4FU. Similarly, the rear upper elastic member 5BU includes a suspension region 5BUI that is suspended at an intermediate position in the transverse direction T, and is closer to the rear joint region 6B, particularly the upper edge region 4BU of the rear portion 4B, on both sides of the suspension region 5BUI. Of the wide region 6BW. As a result, the crotch portion 4C is more reliably expanded in the transverse direction T.

  FIG. 5 shows a further embodiment according to the invention. In addition, in FIG. 5, illustration of an elastic member and a joining area | region is abbreviate | omitted.

  In the example shown in FIG. 5, the lower edge region 4FL of the front portion 4F located on one side of the crotch portion 4C, the lower edge region 4BL of the rear portion 4B, and the crotch portion 4C located between the lower edge regions 4FL and 4BL. The first leg-surrounding sheet 81 having extensibility or stretchability is joined to the side edge region 4CS. Similarly, the lower edge region 4FL and the lower edge region 4BL of the front portion 4F positioned on the other side of the crotch portion 4C, and the side edge region 4CS of the crotch portion 4C positioned between the lower edge regions 4FL and 4BL, The second leg-surrounding sheet 82 having stretchability or stretchability is joined.

  Cutouts 81C and 82C directed inward of the diaper 1 are formed in the first and second leg-around sheets 81 and 82, respectively. Each of these notches 81C and 82C has a semi-elliptical shape having a major axis extending substantially in the transverse direction T.

  During manufacturing, the side edge region 4FS of the front side portion 4F and the side edge region 4BS of the rear side portion 4B are joined to each other. Further, the side edge regions 81S of the first leg periphery sheet 81 positioned in front of and behind the notch 81C are joined to each other. The side edge regions 82S of the second leg-around sheet 82 located in front of and behind the notch 82C are joined to each other. As a result, the first leg-hole sheet 81 defines one leg-hole opening, and the second leg-hole sheet 82 defines the other leg-hole opening.

  At the time of wearing, the 1st leg periphery sheet | seat 81 and the 2nd leg periphery sheet | seat 82 closely_contact | adhere to a wearer's thigh. Therefore, the leakage from the leg opening can be further suppressed.

  That is, in the example shown in FIG. 5, the leg periphery region that defines the leg periphery openings 1 </ b> L and 1 </ b> L includes the first leg periphery sheet 81 and the second leg periphery sheet 82. In addition, these leg-hole regions are stretchable or stretchable by the first leg-hole sheet 81 and the second leg-hole sheet 82 itself.

  In this case, the front lower elastic member 5FL of the front portion 4F, the rear lower elastic member 5BL and the side elastic member 5CS of the rear portion 4B, and the first leg-surrounding sheet 81 and the second leg-surrounding sheet 82, More can be suppressed more reliably. However, these elastic members 5FL, 5BS or elastic members 5FL, 5BS, 5CS may be omitted.

  FIG. 6 shows another example of the crotch portion 4C. In the example shown in FIG. 6, the sheets constituting the back sheet 4CBS are overlapped with each other at a position adjacent to the back surface 4CBF of the crotch portion 4C, thereby forming additional side flaps 4CSFA and 4CSFA. The additional side flaps 4CSFA and 4CSFA extend in the vertical direction on both sides of the absorbent body 4CA outside the side flaps 4CSF and 4CSF. Moreover, the additional flap elastic member 5CSFA is attached to the additional side flaps 4CSFA and 4CSFA in an extended state along the respective longitudinal directions.

  In the example shown in FIG. 6, the leg periphery region includes the front lower elastic member 5FL, the rear lower elastic member 5BL, the side elastic member 5CS, and the first leg periphery sheet 81 and the second leg periphery sheet 82. One or both of them and the additional flap elastic member 5CSFA have elasticity or stretchability. As a result, the leakage from the leg openings 1L and 1L can be more reliably suppressed.

  In the embodiments according to the present invention described so far, both the front-side junction region 6F and the rear-side junction region 6B include the wide regions 6FW and 6BW and the narrow regions 6FN and 6BN. However, any one of the front-side bonding region 6F and the rear-side bonding region 6B may include the wide regions 6FW and 6BW and the narrow regions 6FN and 6BN. For example, any one of the front-side bonding region 6F and the rear-side bonding region 6B may be formed so that the transverse direction T length is substantially constant.

  In the embodiments according to the present invention described so far, the side elastic member 5CS of the crotch portion 4C intersects with both the front lower elastic member 5FL of the front portion 4F and the rear lower elastic member 5BL of the rear portion 4B. doing. However, the side elastic member 5CS may intersect with either the front lower elastic member 5FL or the rear lower elastic member 5BL of the rear portion 4B.

  The various embodiments according to the present invention described so far may be combined with each other.

1 disposable diaper 1W waist opening 1L leg opening 4F front part 4FL lower edge area 4FS side edge area 4B rear side part 4BL lower edge area 4BS side edge area 4C crotch part 4CF front edge area 4CB rear edge area 4CS side edge area 5FL front side Lower elastic member 5BL Rear lower elastic member 5CS Side elastic member 6F Front joint region 6FW Wide region 6FN Narrow region 6B Rear joint region 6BW Wide region 6BN Narrow region

Claims (7)

A pants-type disposable diaper having one waistline opening and a pair of leghole openings, each leghole region defining the leghole openings being extensible or stretchable,
It has a front part, a rear part, and a crotch part,
When the diaper is deployed, the front part and the rear part are spaced apart from each other in the vertical direction, and the crotch part extends in the longitudinal direction at the intermediate position in the transverse direction, and the front part and the rear part are respectively connected to the front and rear joint areas. Joined and
The side edge area of the front part and the side edge area of the rear part are joined together to form a pants-type disposable diaper,
Side elastic members are attached to the crotch portion in the stretched state along both side edge regions,
Each front mating region and a rear junction area, its disposed longitudinally opposite ends around, and two wide region extending transversely across substantially the crotch portion, extending between the two wide regions between continuously , it looks including a narrow region of the narrow in the transverse direction than the wide area,
A front upper elastic member is attached in an extended state along the upper edge region to the front portion, and a rear upper elastic member is attached in an extended state along the upper edge region to the rear portion,
Each of the front upper elastic member and the rear upper elastic member includes interruption regions that are interrupted at the intermediate position in the transverse direction, and on both sides of these interruption regions, the front upper elastic member is a wider region closer to the upper edge region of the front portion. And the rear upper elastic member overlaps with the wider region closer to the upper edge region of the rear part,
Disposable diapers.   A front lower elastic member is attached in a stretched state along the lower edge region to the front portion, and a rear lower elastic member is attached in an extended state along the lower edge region to the rear portion. The rotation area is located on the lower edge area of the front part located on one side of the crotch part, the lower edge area of the rear part, the side edge area of the crotch part located between these lower edge areas, and the other side of the crotch part The disposable diaper according to claim 1, comprising a lower edge region of the front portion and a lower edge region of the rear portion and a side edge region of the crotch portion located between the lower edge regions.   The disposable diaper according to claim 2, wherein the side elastic member is disposed so as to intersect at least one of the front lower elastic member and the rear lower elastic member.   The lower edge region of the front portion located on one side of the crotch portion, the lower edge region of the rear portion, the side edge region of the crotch portion located between these lower edge regions, and the front portion located on the other side of the crotch portion Stretchable or stretchable leg seats are joined to the lower edge region, the lower edge region of the rear portion, and the side edge region of the crotch portion located between these lower edge regions, respectively. The disposable diaper as described in any one of Claim 1 to 3 containing the leg periphery sheet | seat.   The crotch portion has a front surface facing the wearer and a back surface facing the front portion and the rear portion, and the side elastic member is adjacent to the back surface of the crotch portion rather than the surface of the crotch portion. The disposable diaper according to any one of claims 1 to 4, wherein the disposable diaper is arranged as described above.   The crotch portion includes an absorbent body and a pair of side flaps extending longitudinally on both sides of the absorbent body, and a flap elastic member is attached to each side flap in a stretched state along the longitudinal direction thereof. The disposable diaper as described in any one of 5 to 5. Before SL flap elastic member is arranged to intersect the upper front elastic members and the rear upper elastic member, the disposable diaper according to claim 6.

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