WO2013065449A1

WO2013065449A1 - Expanding disposable nappy

Info

Publication number: WO2013065449A1
Application number: PCT/JP2012/075996
Authority: WO
Inventors: 彦行鈴木
Original assignee: 花王株式会社
Priority date: 2011-11-02
Filing date: 2012-10-05
Publication date: 2013-05-10
Also published as: CN103906491A; JP2013094467A; JP5922375B2; CN103906491B

Abstract

The expanding disposable nappy (1A) of the present invention includes a surface sheet (2), a reverse side sheet (3), and a long absorbent body (4) arranged between these sheets (2, 3), which are classified as the ventral portion (A), the dorsal portion (B), and the inguinal portion (C). Fastening tape (51) is provided on both edges of the dorsal portion (B) of the nappy (1A). A stretchable member (7) is provided between the pair of fastening tapes (51, 51) in the nappy (1A). When viewed from the surface sheet (2) above the dorsal portion (B) of the nappy (1A), the stretching force in the width (X-axis) direction of the left tab region (7L) between the left-side fastening tape (51) and the absorbent body (4) is greater than the stretching force in the width (X-axis) direction of the right tab region (7R) between the right-side fastening tape (51) and the absorbent body (4).

Description

Unfoldable disposable diapers

The present invention relates to a deployable disposable diaper for infants or adults.

Generally, unfolded disposable diapers are formed symmetrically. For example, in Patent Document 1, a diaper having a front sheet, a back sheet, and an absorber interposed between the two sheets and having a waistline gather, and an elastic elastic member that forms the waistline gather, is disposed at a predetermined position. The unfolded disposable diaper arranged at a predetermined elongation rate is described.

Japanese Patent Application Laid-Open No. 08-071103

The unfoldable disposable diaper described in Patent Document 1 is easy to wear, has sufficient stretchability during wearing, and has excellent fit to the wearer's waist. However, since the unfoldable disposable diaper described in Patent Document 1 is formed symmetrically, the stretchable physical properties are designed to be the same on the left and right. When a guardian or a caregiver wears an unfoldable disposable diaper on an infant or caregiver, usually the infant or caregiver is laid on the disposable diaper, one fastening tape is fixed, and then the other fastening is performed. Secure the tape. In order to fix the fastening tape in this order, the present inventor has found that the stretchable physical properties required for the left and right are different when the unfolded disposable diaper is mounted. Thus, there was room for further improvement with respect to the ease of mounting the unfoldable disposable diaper.

The present invention is a deployable disposable diaper that includes a top sheet, a back sheet, and a vertically long absorbent body disposed between the sheets, and is divided into an abdominal part, a dorsal part, and a crotch part. The disposable diaper is provided with a fastening tape on each side edge of the back side. Further, in the present invention, the elastic member is disposed between the pair of fastening tapes, and the left side fastening tape and the absorbent body when viewed from the surface sheet side with the back side facing up An unfoldable disposable diaper in which the expansion / contraction force in the width direction of the left tab region between the two is larger than the expansion / contraction force in the width direction of the right tab region between the fastening tape on the right side and the absorbent body. Is.

FIG. 1: is the partially broken top view which looked at the state which expand | deployed the expandable disposable diaper which is 1st Embodiment of this invention from the surface sheet side. 2 is a cross-sectional view taken along line X1-X1 of FIG. FIG. 3 is a partially broken plan view of the composite elastic member 7A provided in the diaper shown in FIG. FIG. 4 is a schematic view showing a preferred apparatus for manufacturing the composite elastic member 7A shown in FIG. FIG. 5 is a schematic view showing a preferred apparatus for producing the diaper shown in FIG. FIG. 6: is the principal part top view which looked at the state which expanded and expanded the diaper which is 2nd Embodiment of this invention from the surface sheet side. FIG. 7: is the principal part top view which looked at the state which expanded and expanded the diaper which is 3rd Embodiment of this invention from the surface sheet side. FIG. 8: is the principal part top view which looked at the state which extended and expanded the diaper which is 4th Embodiment of this invention from the surface sheet side. FIG. 9: is the principal part top view which looked at the state which extended and expanded the diaper which is 5th Embodiment of this invention from the surface sheet side.

Detailed Description of the Invention

Hereinafter, the unfolded disposable diaper of the present invention will be described based on the preferred first embodiment with reference to FIGS. 1 to 5.

The unfolded disposable diaper 1A of the first embodiment (hereinafter also referred to as “diaper 1A”) is an unfolded disposable diaper for infants, and as shown in FIG. The liquid-permeable rear sheet 3 and the vertically long absorbent body 4 disposed between the

sheets

2 and 3 are divided into an abdominal part A, a back part B, and a crotch part C.
The ventral part A is a part located on the abdomen side of the wearer at the time of wearing, the dorsal part B is a part located on the dorsal side of the wearer at the time of wearing, and the crotch part C is a part of the ventral part A and the dorsal part. It is a part arranged between B.
The “Y direction” shown in each figure is the same direction as the longitudinal direction of the absorbent body 4 and also the same direction as the longitudinal direction of the diaper. The “X direction” shown in each figure is the same direction as the width direction of the absorbent body 4 and is also the same direction as the width direction of the diaper.

As shown in FIG. 1, the diaper 1 A has both side edges along the longitudinal direction (Y direction) of the crotch part C formed in a concave shape (arc shape). It has an hourglass shape.
The diaper 1 A is provided with a fastening tape 51 on each side edge of the back side B. Specifically, as shown in FIG. 1, the diaper 1A includes a pair of fastening tapes 51 extending outward in the width direction (X direction) from both side edges along the longitudinal direction (Y direction) of the back side portion B, 51 and a target sheet 52 that engages with the fastening tape 51 is provided on the ventral side A. When the diaper 1A is worn, the pair of

fastening tapes

51, 51 on the back side B are engaged with the target sheet 52 on the abdominal side A, thereby forming a waist opening and a pair of leg openings.

As shown in FIG. 1, the absorbent body 4 of the diaper 1 A is formed in a rectangular shape that is long in the longitudinal direction (Y direction).
In the diaper 1A, the top sheet 2 is formed in a substantially rectangular shape having an outer dimension larger than that of the absorber 4, and the back sheet 3 is formed in an hourglass shape that matches the outer shape of the diaper.
The top sheet 2 and the back sheet 3 cover the entire surface on the skin facing surface side and the entire surface on the non-skin facing surface side, respectively, and the peripheral edges of the absorber 4 (both side edges along the longitudinal direction (Y direction) of the absorber 4) And both end edges in the longitudinal direction (Y direction) and are joined directly or indirectly to each other at the extended portions. Both side edges along the longitudinal direction of the back sheet 3 extend outward in the width direction (X direction) from both side edges along the longitudinal direction (Y direction) of the top sheet 2.

The diaper 1A has a three-dimensional gather 61 and leg gathers 62 positioned outward in the width direction (X direction) from the three-dimensional gather 61 on both side portions 1s and 1s along the longitudinal direction (Y direction). It is formed by arranging 63, 64. Specifically, each of the pair of solid gathers 61 and 61 is formed using a solid gather forming sheet 65. The three-dimensional gather 61 folds the three-dimensional gather forming sheet 65 into two or more layers, arranges one or more elastic members 63 extending in the longitudinal direction (Y direction) between the folded sheets, and arranges the elastic members 63. The formed three-dimensional gathering sheet 65 is arranged so as to extend from the outside in the width direction (X direction) of the side edge of the top sheet 2. The three-dimensional gather-forming sheet 65 provided with the elastic member 63 is disposed in the longitudinal direction of the diaper between the side edge of the absorbent body 4 and a leg elastic member 64 (described later) by a known joining means such as heat seal or adhesive. It is fixed on the surface sheet 2 over the Y direction), and the standing base end of the three-dimensional gather 61 is formed by the fixing portion. The three-dimensional gather 61 formed in this manner is separated from the top sheet 2 by a contraction of the elastic member 63 when the elastic member 63 is contracted, and stands up toward the wearer's skin.

As shown in FIG. 1, the three-dimensional gather forming sheet 65 extends outward in the width direction (X direction) on the side 1 s of the diaper 1 A. 1 or more, the one or more leg elastic members 64 extending in the longitudinal direction (Y direction) are arranged, and the extension part of the three-dimensional gather forming sheet 65 and the back sheet 3 are formed by a known joining means. Thus, the leg elastic member 64 is clamped and fixed. Since the leg elastic members 64 are arranged and fixed in the longitudinal direction (Y direction) in this way, leg gathers 62 are formed in the crotch portion C due to the contraction force of the elastic members 64 during mounting. The

In the unfolded disposable diaper of the present invention, the stretchable member 7 is arranged between the pair of

fastening tapes

51, 51, and when viewed from the top sheet 2 side with the back side B facing upward, In the state shown in FIG. 1, the stretching force in the width direction (X direction) of the left tab region 7 L between the left fastening tape 51 and the absorber 4 is the right fastening tape 51 and the absorber 4. Is formed larger than the expansion / contraction force in the width direction (X direction) of the right tab region 7R. The elastic member 7 in the diaper 1 A is a composite elastic member 7 A that is wider than the absorbent body 4 formed by arranging an elastic member 73 between the

sheet materials

71 and 72. Since the composite elastic member 7A is disposed between the absorbent body 4 and the back sheet 3 and between the pair of

fastening tapes

51, 51 as shown in FIGS. 1A is formed such that the stretching force in the width direction (X direction) of the left tab region 7L is larger than the stretching force in the width direction (X direction) of the right tab region 7R. As described above, the left side and the right side mean the left side and the right side in the state as shown in FIG. 1. Specifically, as shown in FIG. 1, the diaper 1A is expanded and expanded. In the state, the back side portion B side of the diaper 1A is arranged on the back side (head side) of the wearer, and further means the left side and the right side when viewed from the top sheet 2 side.

Here, the “stretching force in the width direction (X direction) of the tab region” can be measured as follows.
In the diaper 1A in the state shown in FIG. 1, the region between the left fastening tape 51 and the absorber 4 is cut into a rectangular shape of 90 mm including 10 mm or more of non-stretchable parts on both sides in the X direction and 80 mm in the Y direction. The cut out sample is set as a sample in the left tab region 7L. When there is no non-stretchable portion of 10 mm or more, a sample of the left tab region 7L is cut out so as to partially include a region that does not substantially stretch such as the absorber 4 and / or the fastening tape 51. Similarly, the region between the right fastening tape 51 and the absorbent body 4 is cut into a rectangular shape of 90 mm including 10 mm or more of non-stretchable parts on both sides in the X direction and 80 mm in the Y direction. A sample of the tab area 7R is used. When there is no non-stretchable portion of 10 mm or more, a sample of the right tab region 7 R is cut out so as to partially include a region that does not substantially expand and contract, such as the absorber 4 and / or the fastening tape 51. For each sample prepared in this manner, using a tensile testing machine (Orientec Co., Ltd. “Tensilon” RTA-100), the sample is fixed so that the non-stretchable portion of 10 mm is gripped with a chuck of 30 mm, and 300 mm Pull the sample to its original length in the X direction at a speed of / min. The measured value of the maximum intensity of the data obtained for each sample is defined as “stretching force in the width direction (X direction) of the tab region” in each sample.

Hereinafter, the composite elastic member 7A of the diaper 1A will be specifically described.
As shown in FIG. 1, the composite elastic member 7 A of the diaper 1 A is disposed at a left and right even position between a pair of

fastening tapes

51, 51, and as shown in FIG. In the overlapping region, the weakly functionalized region 7Z in which the elastic function of the elastic member 73 is reduced is provided, and in the width direction (X direction) of the elastic region 70L on the left side of the weakly functionalized region 7Z in the composite elastic member 7A. Is formed larger than the stretching force in the width direction (X direction) of the stretching region 70R on the right side of the weakly functionalized region 7Z in the composite stretching member 7A. Specifically, the composite stretchable member 7A includes two

rectangular sheets

71 and 72 that are longer in the X direction than the length in the width direction (X direction) of the absorber 4, and a plurality of thread-like elastic members 73. A plurality of thread-like elastic members 73 extending in the X direction between two

sheets

71 and 72 having the same shape and the same size, with an interval in the Y direction, and an adhesive such as hot melt It is formed by fixing using 74. In the weakly functionalized region 7Z, which is a region overlapping with the absorbent body 4, a plurality of thread-like elastic members 73 are divided into a plurality of pieces, and the elastic members that are finely divided no longer have contraction force. It has become.

As shown in FIG. 3, in the composite elastic member 7A of the diaper 1A, the average fixed length of the thread-like elastic member 73 in the left elastic region 70L is larger than the average fixed length of the thread-like elastic member 73 in the right elastic region 70R. Is also getting longer. Here, “the average fixed length of the elastic member 73” means that the plurality of thread-like elastic members 73 arranged in the

stretchable regions

70R and 70L are fixed in an expanded state by the adhesive 74 in each elastic member 73. It means a value obtained by measuring the fixed length of the portion, and averaging the measured values obtained by the measurement. In the composite elastic member 7A of the diaper 1A, as shown in FIG. 3, the adhesive 74 includes an area corresponding to the left elastic area 70L, an area corresponding to the right elastic area 70R, and a left elastic area 70L. It is applied to the outer portion in the Y direction and the region straddling the outer portion in the Y direction of the right extension / contraction region 70R, and is applied in a substantially U-shape. The area corresponding to the left expansion / contraction area 70L to which the adhesive 74 is applied has the same length in the Y direction as the right expansion / contraction area 70R to which the adhesive 74 is applied, but the X direction The length is long. Since the thread-like elastic member 73 is fixed by the adhesive 74 applied in this way, in the composite stretchable member 7A of the diaper 1A, the average fixed length of the thread-like elastic member 73 in the left stretchable region 70L. Is longer than the average fixed length of the thread-like elastic member 73 in the right elastic region 70R, and the elastic force of the elastic member 73 in the left elastic region 70L is the elastic force of the elastic member 73 in the right elastic region 70R. Is bigger than.

The two

sheets

71 and 72 having the same shape and the same size constituting the composite elastic member 7A can be used without particular limitation as long as they are usually used in absorbent articles such as disposable diapers. A non-woven fabric or the like having a liquid permeable basis weight of 10 to 25 g / m ^{2 having} a layer or multilayer structure can be used.
The elastic elastic member 73 constituting the composite elastic member 7A can be used without particular limitation as long as it is usually used for absorbent articles such as disposable diapers. For example, polyurethane, polystyrene-polyisoprene copolymer A thread-like stretchable material made of a polymer, a polystyrene-polybutadiene copolymer, a polyethylene-α-olefin copolymer such as ethyl acrylate-ethylene, or a natural rubber can be used, and a thread-like stretchability made of polyurethane in particular. It is preferable to use a material. The thread-like elastic member 73 preferably has a single yarn size of 310 to 940 dtex, and more preferably 470 to 780 dtex. It is preferable to arrange such a thread-like elastic member 73 so as to have an expansion ratio of 130% or more, particularly 150% or more. Here, the expansion ratio refers to a value obtained by dividing the length after expansion by the length before expansion.
The coating amount of the adhesive 74 such as hot melt is preferably 1 to 10 g / m ² , and more preferably 2 to 4 g / m ² . The adhesive may be directly applied to the thread-like elastic member 73. In this case, the coating amount is preferably 0.010 to 0.030 g / m, and 0.015 to 0.025 g / m. More preferably it is.

In the composite elastic member 7A of the diaper 1A, the elastic force applied to the fastening tape to be engaged with the target tape first is weak, and it is easy to install the elastic force applied to the fastening tape to be engaged with the target tape later. In view of the fact that the average fixed length of the thread-like elastic member 73 in the left stretchable region 70L is 1.05 to 1 of the average fixed length of the thread-like elastic member 73 in the right stretchable region 70R. It is preferably 30 times longer, more preferably 1.10 to 1.25 times longer.

The composite elastic member 7A formed in this way is arranged between the absorber 4 and the back sheet 3 in the thickness direction of the diaper 1A, and between the pair of

fastening tapes

51, 51 in the width direction (X direction). Since the elastic force of the left elastic region 70L is larger than the elastic force of the right elastic region 70R, the left tab region 7L in the diaper 1A in the width direction (X direction) is disposed. The expansion / contraction force is formed larger than the expansion / contraction force in the width direction (X direction) of the right tab region 7R. Further, in the composite stretchable member 7A arranged in this way, at the time of mounting, the plurality of thread-like elastic members 73 positioned outward in the Y direction with respect to the weakly functionalized region 7Z contracts, thereby reducing the waist opening portion. A waist gather is formed at the peripheral edge. Furthermore, in the composite stretchable member 7A arranged in this manner, the plurality of thread-like elastic members 73 located on both outer sides in the width direction (X direction) of the weakly functionalized region 7Z contract during mounting, A waistline gather is formed on the inseam C side rather than the waist gather.
In addition, although the composite elastic member 7A of the diaper 1A is arranged between the absorber 4 and the back sheet 3 in the thickness direction, it may be arranged between the top sheet 2 and the absorber 4.

The composite elastic member 7A of the diaper 1A is manufactured using, for example, a manufacturing apparatus 700 shown in FIG.
Specifically, on the continuous body 720 of the sheet 72 continuously supplied from the raw roll 72a of the sheet 72, using the adhesive coating machine 740, the left stretchable area 70L, the right stretchable area 70R, In addition, the adhesive 74 is intermittently applied in a substantially U-shape so as to correspond to a region straddling the stretchable region 70L and the stretchable region 70R. Then, a plurality of elastic members 73 are arranged on the adhesive 74 coated on the continuous body 720 of the sheet 72 in a state where the elastic member 73 is stretched to a predetermined elongation rate. A continuous body 710 of sheets 71 is continuously supplied from the roll 71a. Next, a continuous body 710 of sheets 71 and a continuous body of sheets 72 that are stacked so as to sandwich the plurality of elastic members 73 in a state of being stretched at a predetermined elongation rate between a pair of nip rolls 701 and 702. 720, and a composite member continuous body 70a (a continuous body of composite elastic members 7A) in which a plurality of elastic members 73 are arranged in an extended state between the continuous body 710 of the sheet 71 and the continuous body 720 of the sheet 72. 70 precursor).

Next, the composite member continuous body 70a (the precursor of the continuous body 70 of the composite elastic member 7A) is supplied to the precut device 703, and a plurality of stretched elastic members arranged in the region corresponding to the weakly functionalized region 7Z. The member 73 is divided so that the individual contraction function is not expressed, and the continuous body 70 of the composite stretchable member 7A in which the weakly functional region 7Z is intermittently formed is manufactured. The precut device 703 has substantially the same configuration as the elastic member dividing portion used in the method for manufacturing a composite elastic member described in JP-A-2002-253605, for example. A cut roll 704 provided on the peripheral surface, and an anvil roll 705 having a smooth surface disposed opposite to the cut roll 704.

Next, a cutter device 706 provided with a continuous body 70 of the composite elastic member 7A, a cutter roll 707 provided with a cutter blade (not shown) on the peripheral surface, and an anvil roll 708 having a smooth surface disposed opposite to the cutter roll 707. To produce individual composite elastic members 7A.

The above-described diaper 1 A having the composite stretchable member 7 A manufactured as described above is manufactured using, for example, a manufacturing apparatus 100 shown in FIG. 5.
Specifically, as shown in FIG. 5, on the continuous body 30 of the back sheet 3, a composite stretchable member 7 A that is long in a direction orthogonal to the conveying direction of the continuous body 30 is placed at a predetermined interval using a belt conveyor 101. Supply with a gap and fix it with adhesive. Next, the absorbent body is used with the belt conveyor 102 so that the end portion in the transport direction of the absorbent body 4 overlaps the weakly functionalized region 7Z of each composite elastic member 7A disposed on the continuous body 30 of the back sheet 3. 4 is supplied and fixed through an adhesive. Separately, a continuous body 650 of a three-dimensional gather forming sheet 65 in which an elastic member 63 extended in the conveying direction is arranged on both side edges of the continuous body 20 of the topsheet 2 via an adhesive. A fixed composite sheet 365 is formed.

Next, as shown in FIG. 5, the composite sheet 365 is supplied and fixed via an adhesive on the continuous body 30 of the back sheet 3 in which the weakly functionalized region 7Z of each composite stretchable member 7A is arranged on the absorbent body 4. To do. When the composite sheet 365 is supplied onto the continuous body 30 of the back sheet 3, between the continuous body 650 of each three-dimensional gather forming sheet 65 constituting the composite sheet 365 and the continuous body 30 of the back sheet 3. The leg elastic member 64 extended in the conveying direction is supplied and fixed via an adhesive to form a continuum of the precursor of the diaper 1A. Next, with respect to the diaper 1A precursor continuum, after the portions arranged around the legs on both side edges of the diaper are cut into an arc, the diaper fastening means such as the fastening tape 51 is fixed. By forming the continuous body 10 of 1A and cutting between the absorbent bodies 4 adjacent to each other in the transport direction, the unfolded disposable diaper 1A can be continuously manufactured.

The material for forming the diaper 1A of the present embodiment will be described.
As the surface sheet 2, the back sheet 3, and the absorbent body 4, each can be used without particular limitation as long as it is usually used for absorbent articles such as disposable diapers. For example, as the surface sheet 2, a liquid-permeable nonwoven fabric having a single layer or a multilayer structure, a liquid-permeable apertured film, or the like can be used. As the back sheet 3, a liquid-impermeable or water-repellent resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used. As the absorbent body 4, an aggregate of fibers such as pulp fibers (which may be a nonwoven fabric) or an absorbent core in which water-absorbing polymer particles are held therein is used as a core wrap made of water-permeable thin paper or nonwoven fabric. What was covered with the sheet | seat etc. can be used. The three-dimensional gather forming sheet 65 can be used without particular limitation as long as it is normally used for absorbent articles such as disposable diapers, and is a liquid-impermeable or water-repellent resin film or resin film. A nonwoven fabric laminate or the like can be used. As the elastic member 63 and the leg elastic member 64, thread-like materials made of natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, polyethylene-α-olefin copolymer such as ethyl acrylate-ethylene, etc. The elastic material can be used.

The target sheet 52 can be used without particular limitation as long as it is normally used for a deployable disposable diaper. For example, the target sheet 52 is engaged with an engagement protrusion (not shown) of a hook material of a fastening tape 51 described later. A loop material having a possible surface structure may be mentioned. As such a loop material, a material capable of fixing the hook material by pressing the hook material can be used without particular limitation, and is manufactured by each manufacturing method such as spunbond, air-through, point bond, and chemical bond. For example, a woven fabric made of non-woven fabric or tricot knitting, or a female member in various known mechanical hook-and-loop fasteners described later can be used.

The hook material and sheet base material that form the fastening tape 51 can be used without particular limitation as long as they are usually used in unfolded disposable diapers. For example, as a hook material, "Magic tape (registered trademark)" (manufactured by Kuraray), "Quicklon (registered trademark)" (manufactured by YKK), "Majikurosu (registered trademark)" (manufactured by Kanebo Bell Touch), etc. The male member etc. in can be used. As the sheet base material, a synthetic resin such as polyethylene, polypropylene, or polyethylene terephthalate, and a sheet or nonwoven fabric made of a composite material of two or more of these synthetic resins can be used. As the engaging projection (not shown) of the hook material, a hook-shaped or hook-shaped one can be used.

The effect at the time of using the diaper 1A of this embodiment of this invention mentioned above is demonstrated.
The diaper 1 A has a width direction of the left tab region 7 L between the left fastening tape 51 and the absorbent body 4 when viewed from the top surface sheet 2 side with the back side B as shown in FIG. The elastic force in the X direction is larger than the elastic force in the width direction (X direction) of the right tab region 7R between the right fastening tape 51 and the absorber 4. As described above, the diaper 1A is formed symmetrically because the stretching force in the width direction (X direction) of the left tab region 7L is larger than the stretching force in the width direction (X direction) of the right tab region 7R. Absent. Therefore, when the infant or caregiver (hereinafter also referred to as an infant or the like) is laid on the diaper 1 when the diaper 1A is worn, the right tab region 7R is more naturally in the width direction than the left tab region 7L ( Since the amount of contraction in the X direction) is small, the length extending from the side of the infant or the like tends to be longer in the right tab region 7R, and a guardian or a caregiver (hereinafter referred to as a guardian or the like). Whether right-handed or left-handed, the right fastening tape 51 on the right tab region 7R side can be easily picked and the amount of shrinkage is small, so the right fastening tape 51 can be easily applied to the target sheet 52 on the ventral side A quickly. Further, since the right tab region 7R has a small expansion and contraction force as described above, the diaper 1A is not easily displaced from an infant or the like when the right fastening tape 51 on the right tab region 7R side is engaged with the target sheet 52.

Moreover, as shown in FIG. 1, the diaper 1A has a composite elastic member 7A disposed between a pair of

fastening tapes

51, 51. The composite elastic member 7A has an absorbent body 4 as shown in FIG. In a region overlapping with the weakly functionalized region 7Z in which the expansion / contraction function of the elastic member is reduced, and the expansion / contraction force in the width direction (X direction) of the left expansion / contraction region 70L is the width of the right expansion / contraction region 70R. It is formed larger than the stretching force in the direction (X direction). Therefore, in the diaper 1A, the expansion / contraction force in the width direction (X direction) of the left tab region 7L is stably larger than the expansion / contraction force in the width direction (X direction) of the right tab region 7R. Therefore, in addition to being excellent in quickly applying the right fastening tape 51 on the right tab region 7R side to the target sheet as described above, when the left fastening tape 51 on the left tab region 7L side is applied to the target tape, A wide range of adjustment of the stretching force that allows parents to adjust the stretching force so that it fits around the waist part of the body, etc. When using a diaper 1A, the guardian or the like stably attaches the diaper 1A to an infant, etc. Easy to do.

Further, as shown in FIG. 3, the composite elastic member 7A of the diaper 1A has an elastic force in the width direction (X direction) of the left elastic region 70L by adjusting the average fixed length of the thread-like elastic member 73. Is formed larger than the expansion / contraction force in the width direction (X direction) of the right expansion / contraction region 70R. Therefore, the stretching force can be easily and stably controlled only by changing the coating pattern of the adhesive 74, and complicated processing equipment and high technology are not required.

Next, an unfolded disposable diaper 1B (hereinafter also referred to as “diaper 1B”) according to a second embodiment of the present invention will be described with reference to FIG.
About the diaper 1B of 2nd Embodiment, a different point from the diaper 1A of 1st Embodiment is demonstrated. The point which is not demonstrated especially is the same as that of the diaper 1A, and description of the diaper 1A is applied suitably.

In the diaper 1B, as shown in FIG. 6, the composite elastic member 7B is not arranged at the left and right equal positions between the pair of

fastening tapes

51, 51, but is arranged on the left side. That is, as shown in FIG. 6, the composite elastic member 7B of the diaper 1B is not disposed between the pair of

fastening tapes

51, 51 but is disposed on the left side. Similar to the composite elastic member 7A of the diaper 1A, the composite elastic member 7B of the diaper 1B has an average fixed length of the thread-like elastic member 73 in the left elastic region 70L as shown in FIG. Is longer than the average fixed length of the thread-like elastic member 73, and the expansion / contraction force in the width direction (X direction) of the expansion / contraction region 70L on the left side of the weakly functionalized region 7Z is on the right side of the weakly functionalized region 7Z. The expansion / contraction region 70 R is formed larger than the expansion / contraction force in the width direction (X direction). Since the diaper 1B is formed by arranging the composite elastic member 7B formed in this way on the left side, as with the diaper 1A, the back side B as shown in FIG. When viewed from above, the expansion / contraction force in the width direction (X direction) of the left tab region 7L between the left fastening tape 51 and the absorber 4 is between the right fastening tape 51 and the absorber 4. It becomes larger than the stretching force in the width direction (X direction) of the right tab region 7R.

The composite elastic member 7B of the diaper 1B is manufactured using the manufacturing apparatus 700 shown in FIG. 4 similarly to the composite elastic member 7A of the diaper 1A. Specifically, like the composite elastic member 7A of the diaper 1A, a continuous composite member in which a plurality of elastic members 73 are arranged in an extended state between the continuous body 710 of the sheet 71 and the continuous body 720 of the sheet 72. The body 70a (same as the precursor of the continuous body 70 of the composite elastic member 7A) is formed, and then the continuous body 70a of the composite member is supplied to the precut device 703 so that the weakly functionalized region 7Z is intermittently formed. The continuous body 70 of the composite elastic member 7A is manufactured. And the continuous body 70 of the composite elastic member 7A manufactured in this way is supplied to the cutter device 706, and compared with the composite elastic member 7A of the diaper 1A, the width of the elastic region 70R on the right side of the weakly functionalized region 7Z. The composite elastic member 7B of the diaper 1B can be continuously manufactured by cutting so that the length in the direction (X direction) is shortened.

The effect at the time of using the diaper 1B of 2nd Embodiment of this invention mentioned above is demonstrated.
About the effect of the diaper 1B of 2nd Embodiment, a different point from the effect of the diaper 1A of 1st Embodiment is demonstrated. The point which is not demonstrated especially is the same as that of the effect of diaper 1A, and description of the effect of diaper 1A is applied suitably.

As shown in FIG. 6, the diaper 1 B can reduce the usage amount of the

sheets

71 and 72, the elastic member 73, and the like, which are materials constituting the composite stretchable member 7 B. For this reason, it is possible to improve the fit by reducing the rigidity of the waistline and to improve the air permeability by reducing the material, further reducing the cost.

Next, an unfolded disposable diaper 1C (hereinafter, also referred to as “diaper 1C”) according to a third embodiment of the present invention will be described with reference to FIG.
About diaper 1C of 3rd Embodiment, a different point from 1 A of diapers of 1st Embodiment is demonstrated. The point which is not demonstrated especially is the same as that of the diaper 1A, and description of the diaper 1A is applied suitably.

As shown in FIG. 7, the diaper 1 C has a composite stretchable member 7 C disposed between the pair of

fastening tapes

51, 51 at equal left and right positions, like the composite stretchable member 7 A of the diaper 1 A. However, the weakly functionalized region 7Z of the composite elastic member 7C extends to the right elastic region 70R side, and the elastic force in the width direction (X direction) of the left elastic region 70L is It is formed larger than the stretching force in the width direction (X direction). The diaper 1C is formed by arranging the composite stretchable member 7C formed in this way at a left and right uniform position across a pair of

fastening tapes

51, 51. 7 in the width direction (X direction) of the left tab region 7L between the left fastening tape 51 and the absorbent body 4 when viewed from the top surface sheet 2 side with the back side B as shown in FIG. The expansion / contraction force becomes larger than the expansion / contraction force in the width direction (X direction) of the right tab region 7 R between the right fastening tape 51 and the absorber 4.

The composite elastic member 7C of the diaper 1C is manufactured using the manufacturing apparatus 700 shown in FIG. 4 in the same manner as the composite elastic member 7A of the diaper 1A. Specifically, like the composite elastic member 7A of the diaper 1A, a continuous composite member in which a plurality of elastic members 73 are arranged in an extended state between the continuous body 710 of the sheet 71 and the continuous body 720 of the sheet 72. The body 70a (same as the precursor of the continuous body 70 of the composite elastic member 7A) is formed. Next, the composite member continuous body 70a is supplied to the pre-cut device 703, and the weakly functionalized region 7Z in which the weakly functionalized region 7Z extends to the right stretchable region 70R side as compared with the composite stretchable member 7A of the diaper 1A. It forms intermittently and the continuous body 70 of the composite elastic member 7C is manufactured. Then, the composite stretchable member 7C can be continuously produced by supplying the continuous body 70 of the composite stretchable member 7C thus manufactured to the cutter device 706 and cutting it like the composite stretchable member 7A of the diaper 1A.

The effect at the time of using the diaper 1C of 3rd Embodiment of this invention mentioned above is demonstrated.
About the effect of 1 C of diapers of 3rd Embodiment, a different point from the effect of 1 A of diapers of 1st Embodiment is demonstrated. The point which is not demonstrated especially is the same as that of the effect of diaper 1A, and description of the effect of diaper 1A is applied suitably.

As shown in FIG. 7, the diaper 1C can control the stretching force only by changing the application pattern of the adhesive 74, and does not require complicated processing equipment or high technology. Further, the right expansion / contraction region 70R is located outward in the width direction (X direction). For this reason, when attached to an infant or the like, the expansion / contraction region 70R hits a position close to the side rather than the back side of the waist part of the infant or the like. 1C waistline is easy to extend and fit is high.

Next, an unfolded disposable diaper 1D (hereinafter, also referred to as “diaper 1D”) according to a fourth embodiment of the present invention will be described with reference to FIG.
About diaper 1D of 4th Embodiment, a different point from 1 A of diapers of 1st Embodiment is demonstrated. The point which is not demonstrated especially is the same as that of the diaper 1A, and description of the diaper 1A is applied suitably.

As shown in FIG. 8, the diaper 1 D has a composite stretchable member 7 D disposed between the pair of

fastening tapes

51, 51 at equal left and right positions, like the composite stretchable member 7 A of the diaper 1 A. However, in the composite elastic member 7D, the amount of the adhesive 74 used for fixing the elastic member 73 in the left elastic region 70L is equal to the amount of the adhesive 74 used for fixing the elastic member 73 in the right elastic region 70R. Less than the amount, and the expansion / contraction force in the width direction (X direction) of the left expansion / contraction region 70L is larger than the expansion / contraction force in the width direction (X direction) of the right expansion / contraction region 70R. Yes. From the viewpoint of suppressing the contraction force of the stretched elastic member 73 by increasing the coating amount of the adhesive 74, the amount of the adhesive 74 in the right stretch region 70R is the amount of the adhesive 74 in the left stretch region 70L. It is preferably 1.2 to 2.0 times. Note that the coating range of the adhesive 74 in the right stretchable region 70R and the coating range of the adhesive 74 in the left stretchable region 70L are the same range. The diaper 1D is formed by arranging the composite stretchable member 7D formed in this way at the left and right even positions between the pair of

fastening tapes

51, 51. Therefore, like the diaper 1A, the diaper 1D 8 in the width direction (X direction) of the left tab region 7L between the fastening tape 51 on the left side and the absorbent body 4 when viewed from the top side of the top sheet 2 with the back side B as shown in FIG. The expansion / contraction force becomes larger than the expansion / contraction force in the width direction (X direction) of the right tab region 7 R between the right fastening tape 51 and the absorber 4.

The composite elastic member 7D of the diaper 1D is manufactured using the manufacturing apparatus 700 shown in FIG. 4 similarly to the composite elastic member 7A of the diaper 1A. Specifically, on the continuous body 720 of the sheet 72 continuously supplied from the raw roll 72a of the sheet 72, using the adhesive coating machine 740, the left stretchable area 70L, the right stretchable area 70R, In addition, the adhesive 74 is intermittently applied in a substantially U-shape so as to correspond to a region straddling the stretchable region 70L and the stretchable region 70R. When coating, the left stretchable area 70L and the right stretchable area 70R have the same coating area, but the coating amount of the adhesive 74 in the left stretchable area 70L is equal to the adhesion of the right stretchable area 70R. A plurality of the elastic members 73 are stretched at a predetermined elongation rate on the adhesive 74 coated on the continuous body 720 of the sheet 72. Furthermore, the continuous body 710 of the sheet 71 is continuously supplied from the raw roll 71a of the sheet 71 onto the sheet 71. Next, a continuous body 710 of sheets 71 and a continuous body of sheets 72 that are stacked so as to sandwich the plurality of elastic members 73 in a state of being stretched at a predetermined elongation rate between a pair of nip rolls 701 and 702. 720, and a composite member continuous body 70a (a continuous body of composite elastic members 7D) in which a plurality of elastic members 73 are arranged in an extended state between the continuous body 710 of the sheet 71 and the continuous body 720 of the sheet 72. 70 precursor). Then, the composite stretchable member 7D can be continuously produced by supplying the continuous body 70 of the composite stretchable member 7D thus manufactured to the cutter device 706 and cutting it like the composite stretchable member 7A of the diaper 1A.

Note that the manufacturing apparatus 700 shown in FIG. 4 includes only one adhesive coating machine 740. However, the manufacturing apparatus 700 is provided so that another adhesive coating machine is juxtaposed, and the adhesive coating machine 740 performs the above-described operation. The adhesive 74 is applied in a substantially U-shape, and the adhesive 74 is applied only to a region corresponding to the right expansion / contraction region 70R by another adhesive coating machine, so that the right expansion / contraction region 70R is applied. The amount of the adhesive 74 applied is larger than the amount of the adhesive 74 applied to the left stretchable region 70L (in other words, the amount of the adhesive 74 applied to the left stretchable region 70L is bonded to the right stretchable region 70R). (Less than the coating amount of the agent 74).

The effect at the time of using the diaper 1D of 4th Embodiment of this invention mentioned above is demonstrated.
About the effect of the diaper 1D of 4th Embodiment, a different point from the effect of the diaper 1A of 1st Embodiment is demonstrated. The point which is not demonstrated especially is the same as that of the effect of diaper 1A, and description of the effect of diaper 1A is applied suitably.

As shown in FIG. 8, the diaper 1D can control the stretching force only by changing the application amount of the adhesive 74, and does not require complicated processing equipment. Further, since the right expansion / contraction region 70R is located in almost the entire width direction (X direction) between the absorbent body 4 and the fastening tape 51, the expansion / contraction region 70R is attached to the waist portion of the infant or the like when attached to an infant or the like. It hits not only the back side but also the position close to the side, and the waistline of the diaper 1C is easy to extend against the abdominal fluctuation such as the swelling of the stomach of an infant when worn, and the fit is high.

Next, an unfolded disposable diaper 1E (hereinafter, also referred to as “diaper 1E”) according to a fifth embodiment of the present invention will be described with reference to FIG.
About the diaper 1E of 5th Embodiment, a different point from the diaper 1A of 1st Embodiment is demonstrated. The point which is not demonstrated especially is the same as that of the diaper 1A, and description of the diaper 1A is applied suitably.

As shown in FIG. 9, the diaper 1E has a composite stretchable member 7E disposed between the pair of

fastening tapes

51 and 51 at equal left and right positions, like the composite stretchable member 7A of the diaper 1A. However, the composite stretchable member 7E is formed such that the number of thread-like elastic members 73 in the left stretchable area 70L is greater than the number of threadlike elastic members 73 in the right stretchable area 70R. Since the diaper 1E is formed by arranging the composite elastic member 7E formed in this way at a left and right even position between a pair of

fastening tapes

51, 51, as in the case of the diaper 1A, 9 in the width direction (X direction) of the left tab region 7L between the left fastening tape 51 and the absorbent body 4 when viewed from the top side of the top sheet 2 with the back side B as shown in FIG. The expansion / contraction force becomes larger than the expansion / contraction force in the width direction (X direction) of the right tab region 7 R between the right fastening tape 51 and the absorber 4.

The composite elastic member 7E of the diaper 1E is manufactured using the manufacturing apparatus 700 shown in FIG. 4 like the composite elastic member 7A of the diaper 1A. Specifically, on the continuous body 720 of the sheet 72 continuously supplied from the raw roll 72a of the sheet 72, using the adhesive coating machine 740, the left stretchable area 70L, the right stretchable area 70R, In addition, the adhesive 74 is intermittently applied in a substantially U-shape so as to correspond to a region straddling the stretchable region 70L and the stretchable region 70R. When coating, the lengths of the X-direction coating regions corresponding to the left stretchable region 70L and the right stretchable region 70R are the same, but correspond to the left stretchable region 70L and the right stretchable region 70R. The adhesive 74 is applied so that the length of the Y-direction coating region is longer in the region corresponding to the left stretchable region 70L than in the region corresponding to the right stretchable region 70R. Then, a plurality of elastic members 73 are arranged on the adhesive 74 coated on the continuous body 720 of the sheet 72 in a state where the elastic member 73 is stretched to a predetermined elongation rate. A continuous body 710 of sheets 71 is continuously supplied from the roll 71a. Next, a continuous body 710 of sheets 71 and a continuous body of sheets 72 that are stacked so as to sandwich the plurality of elastic members 73 in a state of being stretched at a predetermined elongation rate between a pair of nip rolls 701 and 702. 720, a composite member continuous body 70a (a continuous body of composite elastic members 7E) in which a plurality of elastic members 73 are arranged in an extended state between the continuous body 710 of the sheet 71 and the continuous body 720 of the sheet 72. 70 precursor). In the precursor of the continuum 70 of the composite stretchable member 7E, the number of elastic members 73 fixed via the adhesive 74 in the left stretchable region 70L is equal to the number of the elastic members 73 via the adhesive 74 in the right stretchable region 70R. More than the number of elastic members 73 fixed. Then, the composite stretchable member 7E can be continuously produced by supplying the continuous body 70 of the composite stretchable member 7E thus manufactured to the cutter device 706 and cutting it like the composite stretchable member 7A of the diaper 1A.

The effect at the time of using the diaper 1E of 5th Embodiment of this invention mentioned above is demonstrated.
About the effect of the diaper 1E of 5th Embodiment, a different point from the effect of the diaper 1A of 1st Embodiment is demonstrated. The point which is not demonstrated especially is the same as that of the effect of diaper 1A, and description of the effect of diaper 1A is applied suitably.

As shown in FIG. 9, the diaper 1E can control the stretching force only by changing the application pattern of the adhesive 74, and does not require complicated processing equipment or high technology. Further, since the right expansion / contraction region 70R is located in almost the entire width direction (X direction) between the absorbent body 4 and the fastening tape 51, the expansion / contraction region 70R is attached to the waist portion of the infant or the like when attached to an infant or the like. It hits not only the back side but also the position close to the side, and the waistline of the diaper 1C is easy to extend against the abdominal fluctuation such as the swelling of the stomach of an infant when worn, and the fit is high.

The unfoldable disposable diaper of the present invention includes the diaper 1A of the present embodiment, the diaper 1B of the second embodiment, the diaper 1C of the third embodiment, the diaper 1D of the fourth embodiment, and the diaper 1E of the fifth embodiment. It is not limited at all and can be changed as appropriate. In addition, the constituent elements in the diapers 1A to 1E of the first to fifth embodiments described above can be implemented in appropriate combination within a range not impairing the gist of the present invention.

For example, the unfolded disposable diaper of the present invention has an absorption divided into an abdominal side A, a back side B, and a crotch C having a top sheet, a back sheet, and an absorbent body disposed between the sheets. It may be a diaper comprising a sexable main body, a pair of left and right waist panels connected to the left and right outer sides of the back side portion B of the absorbent main body, and a fastening tape on the outer edge of the waist panel. In such a panel type diaper in which the waist panel is a separate member, the elastic member 7 is not a single composite elastic member 7A to 7E that is long in the X direction, but a pair of (two) waist panels. It is only necessary that the stretching force in the width direction (X direction) of the panel is larger than the stretching force in the width direction (X direction) of the right waist panel.

Further, as shown in FIG. 3, the composite elastic members 7A to 7E in the diapers 1A to 1E of the first to fifth embodiments described above include a thread-like elastic member 73, but a plurality of thread-like elastic members. Instead of 73, one film-like elastic member may be provided.
Further, as shown in FIG. 3, the composite elastic members 7A to 7E in the diapers 1A to 1E of the above-described first to fifth embodiments include two

sheets

71 and 72 having the same shape and the same size. One of the

sheets

71 and 72 may be folded back, and a plurality of thread-like elastic members 73 may be disposed between the folded sheets.

The unfolded disposable diaper of the present invention may be a disposable diaper for infants or adults.

The following unfolded disposable diaper is further disclosed regarding the embodiment mentioned above.
<1> A front sheet, a back sheet, a vertically long absorbent body arranged between the sheets, and a deployable disposable diaper divided into an abdominal part, a back part, and a crotch part,
Fastening tape is provided on each side edge of the back side,
An elastic member is arranged between the pair of fastening tapes,
When viewed in plan from the top sheet side with the back side up, the stretching force in the width direction of the left tab region between the left fastening tape and the absorbent is the right fastening tape and the absorption. An unfolded disposable diaper that is larger than the stretching force in the width direction of the right tab region between it and the body.

<2> The elastic member is a composite elastic member wider than the absorbent body formed by arranging an elastic member between sheet materials,
The composite stretchable member has a weakly functionalized region in which the stretchable function of the elastic member is reduced in a region overlapping with the absorber,
The expansion / contraction force in the width direction of the expansion / contraction region on the left side of the weakly functionalized region in the composite elastic member is greater than the expansion / contraction force in the width direction of the expansion / contraction region on the right side of the weakly functionalized region in the composite elastic member. The unfoldable disposable diaper described in <1>, which is large.
<3> The elastic member is a plurality of thread-like elastic members,
The deployable disposable diaper according to <2>, wherein an average fixed length of the thread-like elastic member in the left stretchable region is longer than an average fixed length of the thread-like elastic member in the right stretchable region.
<4> The amount of the adhesive used for fixing the elastic member in the left stretchable region is smaller than the amount of the adhesive used for fixing the elastic member in the right stretchable region <2>. The unfoldable disposable diaper described in 1.
<5> The elastic member is a plurality of thread-like elastic members,
The unfoldable disposable diaper according to <2>, wherein the number of the thread-like elastic members in the left stretchable region is greater than the number of the thread-like elastic members in the right stretchable region.

<6> The elastic member is a plurality of thread-like elastic members,
The unfolded disposable diaper according to any one of <2> to <5>, wherein the plurality of thread-like elastic members are divided into a plurality of pieces in the weakly functionalized region.
<7> In the composite stretchable member, the adhesive includes a region corresponding to the left stretchable region, a region corresponding to the right stretchable region, a longitudinally outer portion of the left stretchable region, and the right side. The expansion mold according to any one of <2> to <6>, wherein the expansion mold is applied to a region straddling the outer portion in the longitudinal direction of the stretchable region, and is applied in a substantially U-shape. Disposable diapers.
<8> The elastic member is a plurality of thread-like elastic members,
The unfolded disposable type according to any one of <2> to <7>, wherein the thread-like elastic member has a single yarn size of 310 to 940 dtex and an expansion ratio of 130% or more. Diapers.
<9> The average fixed length of the thread-like elastic member in the left stretchable region is 1.05 to 1.30 times longer than the average fixed length of the thread-like elastic member in the right stretchable region. The unfoldable disposable diaper according to any one of <3> to <8>.

<10> The disposable diaper according to any one of <1> to <9>, wherein both side edges along the longitudinal direction of the crotch part are formed in a concave arc shape. .
<11> The disposable diaper as a whole has the hourglass-like shape in which the central portion in the longitudinal direction (Y direction) is constricted, The unfolded type according to any one of <1> to <9>. Disposable diapers.
<12> The absorbent body is formed in a rectangular shape that is long in the longitudinal direction, the top sheet is formed in a substantially rectangular shape having a larger outer dimension than the absorbent body, and the back sheet is the outer shape of the disposable diaper. The unfolded disposable diaper according to any one of <1> to <11>, wherein the unfolded disposable diaper is formed in an hourglass shape that matches a shape.
<13> The top sheet and the back sheet, respectively, extend from a peripheral edge of the absorber, and are bonded to each other at the extending portion thereof. Any one of <1> to <12> The unfoldable disposable diaper described in 1.
<14> The <1> to <13>, wherein the disposable diaper is formed with solid gathers and leg gathers positioned outward in the width direction from the solid gathers on both sides along the longitudinal direction. The unfoldable disposable diaper according to any one of the above.
<15> The three-dimensional gather is a three-dimensional gather in which a three-dimensional gather forming sheet is folded back into two or more layers, and one or more elastic members stretched in the longitudinal direction are arranged between the folded sheets. The unfolded disposable diaper according to <14>, wherein the forming sheet is formed so as to extend from the outside in the width direction of the side edge of the top sheet to the inside.
<16> In the composite elastic member, the expandable mold according to any one of <2> to <15>, wherein the adhesive is applied at a coating amount of 1 to 10 g / m ² . Disposable diapers.
<17> The unfolded disposable diaper according to any one of <1> to <16>, wherein the topsheet is a nonwoven fabric.
<18> The disposable diaper includes a target sheet that engages with the fastening tape on the abdominal side,
The unfolded disposable diaper according to any one of <1> to <17>, wherein a loop material is used as the target sheet.

The deployable disposable diaper of the present invention further improves the ease of wearing.

Claims

An unfolded disposable diaper comprising a top sheet, a back sheet, and a vertically long absorbent body arranged between the sheets, and divided into an abdominal part, a dorsal part, and a crotch part,
Fastening tape is provided on each side edge of the back side,
An elastic member is arranged between the pair of fastening tapes,
When viewed in plan from the top sheet side with the back side up, the stretching force in the width direction of the left tab region between the left fastening tape and the absorbent is the right fastening tape and the absorption. An unfolded disposable diaper that is larger than the stretching force in the width direction of the right tab region between it and the body.
The elastic member is a composite elastic member wider than the absorber formed by arranging an elastic member between sheet materials,
The composite stretchable member has a weakly functionalized region in which the stretchable function of the elastic member is reduced in a region overlapping with the absorber,
The expansion / contraction force in the width direction of the expansion / contraction region on the left side of the weakly functionalized region in the composite elastic member is greater than the expansion / contraction force in the width direction of the expansion / contraction region on the right side of the weakly functionalized region in the composite elastic member. The unfoldable disposable diaper according to claim 1.
The elastic member is a plurality of thread-like elastic members,
The deployable disposable diaper according to claim 2, wherein an average fixed length of the thread-like elastic member in the left stretchable region is longer than an average fixed length of the thread-like elastic member in the right stretchable region.
The expansion according to claim 2, wherein the amount of the adhesive used for fixing the elastic member in the left extension / contraction region is smaller than the amount of the adhesive used for fixing the elastic member in the right extension / contraction region. Mold disposable diaper.
The elastic member is a plurality of thread-like elastic members,
The unfoldable disposable diaper according to claim 2, wherein the number of the thread-like elastic members in the left stretchable region is larger than the number of the thread-like elastic members in the right stretchable region.
The elastic member is a plurality of thread-like elastic members,
The unfolded disposable diaper according to any one of claims 2 to 5, wherein in the weakly functionalized region, the plurality of thread-like elastic members are divided into a plurality of individual pieces.
In the composite stretchable member, the adhesive includes a region corresponding to the left stretchable region, a region corresponding to the right stretchable region, a longitudinally outer portion of the left stretchable region, and the right stretchable region. The unfolded disposable diaper according to any one of claims 2 to 6, wherein the unfolded disposable diaper is coated in a region straddling the outer portion in the longitudinal direction.
The elastic member is a plurality of thread-like elastic members,
The unfoldable disposable diaper according to any one of claims 2 to 7, wherein the yarn-like elastic member has a single yarn size of 310 to 940 dtex and an expansion ratio of 130% or more.
The average fixed length of the thread-like elastic member in the left stretchable region is longer by 1.05 to 1.30 times the average fixed length of the thread-like elastic member in the right stretchable region. Thru | or the deployment type disposable diaper of any one of 8.