JP2014204756A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable diaper which facilitates the understanding of a position of a leg expanding and contracting part and the arrangement of the leg expanding and contracting part in a right position.SOLUTION: A disposable diaper 10 is folded in such a manner that an outside end part in a product width direction of the disposable diaper is oriented toward the inside in the product width direction via a folding line positioned inside a leg expanding and contracting part 75 in the product width direction. A marker part 31 in an expanding and contracting direction of the leg expanding and contracting part is provided in a leg arrangement region where the leg expanding and contracting part is disposed. The marker part 31 is provided to be visible from a skin non-contact surface of the disposable diaper.

Description

  The present invention relates to a disposable diaper having a leg stretchable part disposed around a leg of a wearer.

  Patent Document 1 discloses a diaper package in which a plurality of disposable diapers folded in the product longitudinal direction starting from the center of the crotch region after folding both ends in the product width direction inward in the width direction are disclosed. Has been. Thus, a disposable diaper can be accommodated compactly by folding a disposable diaper in a product width direction and a product longitudinal direction.

  When using the disposable diaper of the cited reference 1, after taking out a disposable diaper from the inside of a film and developing the said disposable diaper in a product longitudinal direction, it expand | deploys in the product width direction. In the state developed in this manner, the wearer is placed on the disposable diaper, and the fastening tape located in the rear waistline region is fastened to the target part in the front waistline region, thereby mounting the disposable diaper on the wearer.

JP 2005-297968 A

  Since the disposable diaper of the cited document 1 is folded in the product longitudinal direction and the product width direction before use, folds are formed along the product longitudinal direction and the product width direction in the unfolded state. For this reason, even if the disposable diaper is once deployed, the portion developed from the crease base may be folded back to the original state and worn on the wearer in the folded state.

  For example, a crease that is folded along the product longitudinal direction is formed on the inner side in the width direction of the leg stretchable part at both ends of the disposable diaper in the product width direction. Therefore, a leg expansion-contraction part is caught between a body and a disposable diaper at the time of mounting | wearing, and a leg expansion-contraction part may not be correctly arrange | positioned around a wearer's leg. As described above, when a part of the leg stretchable part is attached to the wearer, the wearing assistant pulls the leg stretchable part outward and corrects the position of the leg stretchable part correctly. ing. However, since the leg stretchable part is contracted, it may be difficult to visually recognize an elastic member or the like constituting the leg stretchable part, and the position of the leg stretchable part may not be corrected correctly.

  Then, this invention is made | formed in view of such a condition, and it aims at providing the disposable diaper which can grasp | ascertain the position of a leg expansion-contraction part easily and can arrange | position a leg expansion-contraction part in the correct position easily. .

  The disposable diaper according to the present disclosure includes a front waistline region (front waistline region 20), a rear waistline region (rear waistline region 25), and a crotch region (inseam region) positioned between the front waistline region and the rear waistline region. 30), a product longitudinal direction (product longitudinal direction L) from the front waistline region to the rear waistline region, a product width direction (product width direction W) orthogonal to the product longitudinal direction, and a pair of leg opening portions (Leg leg opening 35), an absorber (absorbent body 40) extending across at least one of the front waistline area and the rear waistline area across the crotch area, and the crotch area along the leg circumference opening. A pair of leg stretchable portions (leg stretchable portions 75) formed so as to extend from the front waistline region to the rear waistline region, and are located on the inner side in the product width direction than the leg stretchable portion Through the product width direction outside of the disposable diaper A disposable diaper whose end is folded inward in the product width direction, and in the leg placement region where the leg stretchable part is placed, a mark part (marker part 31) along the stretch direction of the leg stretchable part ), And the mark portion is provided so as to be visible from the non-skin contact surface of the disposable diaper.

  According to the features of the present invention, it is possible to provide a disposable diaper in which the position of the leg stretchable part can be easily grasped and the leg stretchable part can be easily placed at the correct position.

It is an expanded top view of the disposable diaper concerning this embodiment. It is an expansion rear view of the disposable diaper concerning this embodiment. It is sectional drawing of the disposable diaper along the F1-F1 line | wire shown in FIG. It is sectional drawing of the disposable diaper along the F2-F2 line | wire shown in FIG. It is the figure which showed the state which folded the disposable diaper which concerns on this embodiment. It is an expansion | deployment rear view of the disposable diaper which concerns on the modification 1. FIG. It is an expansion | deployment rear view of the disposable diaper which concerns on the modification 2. FIG.

  Next, an embodiment of the disposable diaper according to the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones.

  Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings may be contained.

  FIG. 1 is a developed plan view of a disposable diaper 10 according to the present embodiment. FIG. 2 is a cross-sectional view of the disposable diaper 10 taken along line F1-F1 shown in FIG. FIG. 3 is a cross-sectional view of the disposable diaper 10 taken along the line F2-F2 shown in FIG. The developed plan view shown in FIG. 1 shows a state in which the elastic members 71 of the leg stretchable part 75 and the leg side gathers 80 are stretched until the top sheets 50 and the side flaps 70 constituting the disposable diaper are not formed. It is.

  The disposable diaper 10 has a front waistline region 20, a crotch region 25, and a rear waistline region 30. The front waistline region 20 is a portion in contact with the wearer's front waistline portion (abdomen portion). Further, the rear waistline region 30 is a portion in contact with the rear waistline portion (back portion) of the wearer. The crotch region 25 is located between the front waistline region 20 and the back waistline region 30.

  Further, the disposable diaper 10 is formed with a pair of leg-hole openings 35. The leg opening 35 is provided at a side end in the product width direction of the disposable diaper, and is a portion that is disposed along the leg of the wearer while the disposable diaper is worn by the wearer.

  In the present embodiment, a direction from the front waistline region 20 to the rear waistline region 30 is referred to as a product longitudinal direction L, and a direction orthogonal to the product longitudinal direction L is referred to as a product width direction W.

  The disposable diaper 10 includes an absorbent body 40 that straddles the crotch region 25 and extends from the crotch region 25 toward at least one of the front waistline region 20 and the rear waistline region 30. The absorber 40 includes an absorbent core 40a and a core wrap 40b.

  The absorbent core 40a is the same as a conventional disposable diaper, and can be appropriately configured using a known member or material such as pulverized pulp or a superabsorbent polymer. The absorbent core 40a is wrapped with a sheet-like core wrap 40b.

The core wrap 40b is a sheet that covers the absorbent core 40a. At least a part on the skin surface side of the core wrap 40b is constituted by various fiber nonwoven fabrics or tissue sheets having liquid permeability. For example, air-through nonwoven fabric of weight approximately 10 to 30 g / m ^2, spun bond nonwoven fabric, SMS can be used (spunbond - spunbond - meltblown) nonwoven or tissue sheet mass about 10 to 30 g / m ^2,.

  A liquid-permeable top sheet 50 is provided on the surface side (skin contact surface side) of the absorber 40. A liquid-impermeable back sheet 60a is provided on the back side (non-skin contact surface side) of the absorber 40.

  Side flaps 70 are respectively provided on the side edges of the absorbent body 40 in the product width direction W. The side flap 70 is comprised by the nonwoven fabric which piled up the 1 sheet or 2 or more sheets. The pair of side flaps 70 are each provided with a fastening tape 90.

  The fastening tape 90 extends along the product width direction W in the rear waistline region 30, and is fastened to the non-skin contact surface of the front waistline region 20, thereby holding the disposable diaper 10 on the wearer's body.

  The target portion 95 is disposed on the non-skin contact surface in the front waistline region, and is configured so that the pair of fastening tapes 90 are respectively fastened.

  In the present embodiment, the front waistline region 20, the rear waistline region 30, and the fastening tape 90 constitute a waistline holding portion. The waistline holding portion of the rear waistline region 30 is a range extending in the width direction from the region where the engaging member of the fastening tape 90 is provided. The waistline holding portion of the front waistline region 20 is a range extending in the width direction from the region where the target portion 95 is provided.

  The disposable diaper 10 includes a crotch expansion / contraction portion 200 that is formed in a region overlapping the absorber of the crotch region 25 and that can expand and contract in the product longitudinal direction L. Specifically, the crotch expansion / contraction part 200 is disposed in the crotch region 25. The configuration of the crotch expansion / contraction unit 200 will be described in detail later.

  The surface side (top sheet 50 side) of the absorber 40 is provided around a leg opening 35 and is provided with a pair of leg stretchable parts 75 that can be stretched in the product longitudinal direction L.

  The leg stretchable part 75 is longer than the crotch stretchable part 200 in the product longitudinal direction L, and is provided outside the crotch stretchable part 200 in the product width direction W.

  The leg expansion / contraction part 75 should just be comprised so that the leg periphery opening part 35 can be expanded-contracted in a product longitudinal direction, and may be arrange | positioned along the leg periphery opening part 35, and one part is a leg periphery opening part. It may be arranged in an inclined state with respect to 35.

  The leg stretchable portion 75 is a portion that is substantially shrunk in the longitudinal direction of the product by the stretchable sheet or the like, and is a concept that excludes a portion where the stretchable sheet is disposed in a state where the shrinkage force is not exerted. The configuration of the leg expansion / contraction part 75 will be described in detail later.

  A pair of leg side gathers 80 extending along the product longitudinal direction L are provided inside the pair of leg stretchable portions 75 (near the center in the product width direction W). The leg side gathers 80 are provided at the inner end of the side flap 70 in the product width direction, and are erecting and expanding gathers disposed on the inner side in the product width direction than the leg stretchable parts 75. The leg side gathers 80 are arranged on the inner side in the product width direction than the leg stretchable parts 75. The leg side gathers 80 can adopt a conventionally well-known configuration. Specifically, the leg side gathers 80 may be formed of a sheet material different from the side flaps 70.

  The side flap 70 is folded back to the top sheet side at the inner end in the product width direction, and two layers are laminated. An elastic member 71 (see FIG. 2) is provided between the two layers of side flaps 70 so as to extend in the longitudinal direction. The side flaps 70 and the elastic members 71 form leg side gathers 80.

  The leg side gather 80 includes a joint portion 81 joined to the top sheet 50 or the back sheet 60a, and a free end portion 82 on which an elastic member is disposed. Of the free end portion 82, the central portion in the longitudinal direction including the crotch region 25 is contracted in the product longitudinal direction by the elastic member 71 to form a contracted portion 84. When worn, the leg side gather 80 rises with the joint portion 81 as the base end portion, and the contraction portion 84 of the free end portion 82 contacts the wearer's skin with the apex portion. That is, the joint portion becomes the base end portion of the rising side of the leg side stretchable portion.

  The contraction portion 84 is a portion substantially contracted in the product longitudinal direction by the elastic member 71, and is a concept excluding a portion where the elastic member 71 is disposed in a state where the contraction force is not exerted. Further, in FIG. 2, in the leg side gather, a joining portion 81 where the side flap 70 and the top sheet 50 (or the back sheet 60a or the like) are joined is shown by hatching.

  A plurality of joint portions 81 are provided, the first joint portion 81A is disposed outside the contraction portion 84 in the product longitudinal direction, and the second joint portion 81B is disposed outside the contraction portion 84 in the product width direction. ing. Therefore, the leg side gathers 80 are configured such that the center portion in the product longitudinal direction including the crotch region 25 stands on the wearer side.

  Of the joined portions 81 of the leg side gathers 80, the first joined portions 81A arranged on the outer side in the product longitudinal direction from the contracted portion 84 are joined to the top sheet 50.

  Among the joint portions 81 of the leg side gathers 80, the second joint portion 81B disposed on the outer side in the product width direction from the contraction portion 84 is between the crotch stretch portion 200 and the leg stretch portion 75 in the product width direction W. Placed in. The second joining portion 81B is joined to the back sheet 60a (and partly the exterior sheet 60) over the entire length in the product longitudinal direction. The back sheet 60a is disposed between the absorber 40 and the exterior sheet 60, and functions as a leak-proof sheet.

  Of the joined portions 81 of the leg side gathers 80, the first joined portions 81A arranged on the outer side in the product longitudinal direction from the contracted portion 84 are joined to the top sheet 50.

  The joining portion 81 of the leg side gather 80 can employ various configurations. The joining portion may be, for example, a portion that extends from the crotch part to the front waistline region and the back waistline region in the product longitudinal direction and is joined to the top sheet, or liquid-impermeable on the outer side in the width direction than the absorbent core 40a. It may be a part joined to a conductive back sheet or exterior sheet, and is configured to be a standing base end part.

  Further, the leg side gathers only need to be an upright gather disposed on the inner side in the product width direction with respect to the leg stretchable part, and are not limited to the above configuration, and it is possible to adopt a conventionally known leg side gather configuration. It is.

  Further, between the pair of fastening tapes in the product width direction, a waist stretchable portion 85 that can be stretched in the product width direction is provided. The waist elastic part 85 contracts between the fastening tapes in the width direction.

  In the present embodiment, the waist elastic part 85 is constituted by an elastic sheet. The members constituting the waist elastic part 85 are not particularly limited, but it is preferable to use a member that is as thin as possible, has low bending rigidity, and has a small width ratio. By configuring the waist stretchable portion 85 with a material having low bending rigidity, the waist stretchable portion 85 can easily bend along the body, and the waist stretchable portion 85 can be moved along the body without applying a load to the wearer's body. Can be fitted. In addition, by configuring the waist stretchable portion 85 with a material having a small width, it is possible to suppress contraction in the product longitudinal direction of the disposable diaper when the disposable diaper extends in the product width direction, and to dispose the disposable diaper around the wearer's waist Can be prevented from being pulled down to the crotch side.

In the present embodiment, a stretchable film having a basis weight of 20 to 45 g / m ² is used as the waist stretchable portion 85.

  The waist stretchable portion 85 is stretched by 1.5 to 2.5 times the length in the non-stretched state (natural state), and then adhered to the exterior sheet 60 by a hot melt adhesive or heat treatment. .

  In the present embodiment, the waist stretchable portion 85 is disposed between the exterior sheet 60 and the backsheet 60a. However, in the configuration in which the core wrap 40b extends outward in the product longitudinal direction from the absorbent core 40a, the waist stretchable portion 85 is disposed between the core wrap 40b and the back sheet 60a or the exterior sheet 60. It may be. The position of the waist elastic part is not particularly limited. However, it is preferably arranged on the non-skin contact surface side with respect to the absorber 40. Further, in a region where the absorbent body is not disposed, it may be disposed between the side flap 70 and the back sheet 60a or the exterior sheet 60.

  The waist stretchable portion according to the present embodiment is configured to stretch in the product width direction, but the waist stretchable portion may be configured to stretch in the product width direction and the product longitudinal direction. Good.

  The absorber 40 in the rear waistline region is provided with a notch 110 as a low-rigidity area that has a lower basis weight than other parts of the absorber or does not have the absorbent core 40a. The notch 110 has a shape in which the length in the product width direction gradually decreases from the product width direction center of the end portion on the rear waist region side of the absorber 40 toward the front waist region side. More specifically, it has a wedge shape in a plan view of the disposable diaper. Further, the boundary between the absorbent core 40a and the notch 110 is formed by an arc that is convex toward the center in the product width direction W. The absorber 40 on the outer side in the product width direction than the notch 110 has a trapezoidal shape that protrudes toward the end on the rear waistline region side.

  A part of the notch 110 is disposed so as to overlap with the waist elastic part 85 in a plan view of the disposable diaper. In the present embodiment, the waistline stretchable part 85 is disposed so as to overlap a part of the notch 110, but the waistline stretchable part 85 may be disposed so as to overlap the notch 110.

  By forming such a notch 110, the notch 110 does not hinder expansion and contraction of the waist elastic part 85, and even if the waist elastic part 85 contracts, the notch 110 narrows and the product width is larger than the notch 110. Since the interval between the absorbent bodies on both sides in the direction becomes narrow, the absorbent body 40 is unlikely to rise in an unintended shape. Note that the notch 110 is preferably narrower than the width of the waist extension / contraction part 85 in consideration of prevention of leakage of excrement.

  Further, when the absorber 40 is contracted in the product width direction W by the waist stretchable portion 85 and the interval between the absorbers on both sides of the product width direction becomes narrower than the notch 110, the rear waistline region 30 side of the notch 110 Since the part closer to the end of the body is closer to the center of the product width direction W than the part closer to the crotch region 25, the contraction amount in the product width direction W is reduced between the part on the rear waistline region 30 side and the part closer to the crotch region 25. A difference occurs, and the rear waistline region 30 comes to stand.

  That is, since the waist stretchable portion 85 and the wedge-shaped notch 110 that can be stretched in the product width direction W are provided, a cup shape in which the disposable diaper 10 swells on the non-skin surface side is easily formed when the disposable diaper 10 is mounted. .

  In the present embodiment, the notch 110 does not have the absorbent core 40a, and the waist stretchable portion 85 exists so as to overlap the notch 110, so that the rear waistline region 30 side in the product longitudinal direction L is present. Since the portion closer to the end is closer to the center of the product width direction W than the end position of the absorbent core 40a and the rise of the rear waistline region 30 becomes more prominent, the cup shape can be formed more stably.

  In the present embodiment, the waist stretchable portion 85 exists beyond the side edge in the product width direction W of the absorbent core 40a, so that the rear waistline region in the product longitudinal direction L while forming the disposable diaper 10 in a cup shape. About the absorptive core 40a of a position from the edge part side of 30 side, it can be made to follow a wearer's body positively. Further, at least a part of the waist elastic part 85 and the notch 110 are present in a region extending in the width direction from the pair of fastening tapes 90. Therefore, even when the disposable diaper 10 is worn with the disposable diaper 10 laid down and the wearer is laid down, the waist stretchable portion 85 that exists beyond the side edge in the product width direction W of the absorbent core 40a is worn. It is not laid under the person's body. Therefore, by pulling the fastening tape 90, the side edge of the waist stretchable portion 85 extends, and it becomes easier to position the body more reliably than the cup-shaped waist side.

  In the present embodiment, the absorbent core 40a on the outer side in the product width direction from the notch 110 is convex toward the rear waistline region. Therefore, as described above, in addition to facilitating the formation of a cup shape in which the disposable diaper 10 swells on the non-skin surface side, the surface area of the absorbent core 40a is maintained, so excretion from the end of the absorbent core 40a It can prevent leakage of things.

  In the present embodiment, the notch 110 has a wedge shape, and the boundary between the absorbent core 40a and the notch 110 is an arc that protrudes toward the crotch region 25. The radius of the arc is 50 mm to 200 mm. For this reason, the width of the notch 110 in the product width direction W increases nonlinearly as it goes to the end portion on the rear waistline region 30 side in the product longitudinal direction L, and the rise of the rear waistline region 30 becomes more prominent. It is easy to form a cup shape more stably. Furthermore, since the boundary between the absorbent core 40a and the notch 110 is an arc that protrudes toward the inseam area 25, the rear waistline area 30 becomes a round cup shape due to the shrinkage of the notch 110, and the wearer The shape is easy to follow along the rounded buttocks.

  Further, since the notch 110 is formed, the end of the absorber 40 on the rear waist region side is formed with a convex shape toward the rear region on the left and right sides. Since this absorbent body shape is reminiscent of placing a butt, there is an effect that the user can more easily adjust the diaper to the correct position for the wearer.

  The bending stiffness in the present embodiment is based on a stiffness value based on the Taber method (JISP8125), and is measured by the following method. First, with the disposable diaper deployed, a sample (for example, an absorber) of a portion to be measured for bending rigidity is collected. The sample has a size of 70 mm in the product width direction × 38 mm in the product longitudinal direction for the measurement target portion. If the sample includes an elastic elastic member, the elastic member is removed. Note that a Taber stiffness tester manufactured by Yasuda Seiki Seisakusho Co., Ltd. is used as a tester for measuring the rigidity value. Moreover, the number of samples is 10, and it measures about each sample and makes the average value the rigidity value.

  The measurement procedure is as follows (a) to (e).

  (A) The thickness (A) of the collected sample is measured.

  (B) Next, the sample is sandwiched to such an extent that it touches the center of the chuck (lower side) of the testing machine.

  (c) The sum of the left and right gaps between the support roller and the sample is adjusted to (A) × 0.80 (mm).

  (d) The auxiliary weight is appropriately selected so that the indicated load scale falls within the range of 15 to 85% of the maximum scale.

  (e) Rotate the sample in both the left and right directions, stop at the point where the 15 ° support line and the center mark of the pendulum coincide, and read the scale on the testing machine. The numerical value on the left side of the scale is (B), and the numerical value on the right side of the scale is (C).

  The rigidity value is obtained by the following equation.

Formula: rigidity value (mN · m) = (( (B) + (C)) / 2) × ( the auxiliary weight coefficient) × 9.81 × 10- ²
If the width of the test piece cannot be 38 mm, it is converted into a bending moment of 38 mm width.

  The higher the rigidity value measured in this way, the higher the bending rigidity, and the lower the rigidity value, the lower the bending rigidity.

  The fastening tape 90 is attached to the region of the side flap 70 corresponding to the rear waistline region 30. The fastening tape 90 is provided with a base sheet 91 connected to the side flap 70, an engagement hook (not shown) as a plurality of engagement members, and a hook sheet 92 fixed to the base sheet 91; Is provided. The hook sheet 92 is an area where an engagement member is provided, and the above-described waistline holding portion is an area extending from the hook sheet 92 in the width direction.

  The hook sheet 92 is fixed to the base sheet 91, specifically, joined. The hook sheet 92 and the base sheet 91 are preferably joined so that the rigidity of the fastening tape 90 does not become higher than necessary. Specifically, it is preferable that the hook sheet 92 and the base sheet 91 are joined by a hot melt adhesive applied intermittently such as a dot shape, a line shape, or a spiral shape. The hook sheet 92 and the base sheet 91 may be joined by heat sealing or the like.

The base sheet 91 is composed of one or two or more non-woven fabrics stacked. As the base material sheet 91, a nonwoven fabric produced by a production method such as spunbond (SB) or spunbond-meltblown-spunbond (SMS) can be used. The basis weight of the nonwoven fabric constituting the base sheet 91 (total basis weight in the case of a plurality of sheets) is 30 to 120 g / m ² , preferably 40 to 90 g / m ² .

  The target portion 95 is provided on the surface on the non-skin contact side of the exterior sheet 60 in the front waistline region. The target portion 95 is configured so that the engaging hook of the fastening tape is hooked, and functions as a loop of a hook and loop locking system. As the target portion, for example, an air-through nonwoven fabric can be used.

  As the target portion 95, for example, a fiber nonwoven fabric made from a polyolefin-based thermoplastic synthetic resin fiber or a polyolefin-based thermoplastic synthetic resin film can be used. Further, the loop attached to the target portion can be formed of a polyolefin-based thermoplastic synthetic resin.

  Furthermore, as the target portion 95, a non-woven fabric which is a bulky non-woven fabric and which is partly embossed to prevent fluffing on the non-woven fabric surface may be used.

  Further, the exterior sheet 60 of the disposable diaper is formed of non-woven fabric, and the design indicating the attachment position of the fastening tape 90 is printed on the back sheet 60a or the non-skin contact side surface of the exterior sheet 60, or the design sheet is backsheet It can also be set as the target portion by arranging it on the non-skin contact side of 60a or the exterior sheet 60.

  The leg expansion / contraction part 75 is arranged along the leg opening 35 provided on the outer side in the product width direction with respect to the absorber 40, and is configured to be extendable / contractible in the product longitudinal direction L. The leg opening 35 and the leg expansion / contraction part 75 have a width direction inner end region 75I whose position in the width direction is located on the innermost side in the crotch region. The leg opening 35 and the leg stretchable part 75 extend toward the outer side in the product width direction from the crotch region 25 toward the outer side in the product longitudinal direction, particularly in the rear waistline region. The width direction inner end region 75I of the leg stretchable part 75 may be arranged continuously in the product longitudinal direction or may not be continued in the product longitudinal direction. In the present embodiment, the region in which the position in the width direction of the leg opening 35 is located on the innermost side in the crotch region coincides with the width direction inner end region 75I of the leg stretchable portion 75, but does not necessarily coincide. It does not have to be.

  The leg expansion / contraction part 75 of this Embodiment is comprised with the elastic sheet. For example, the stretchable sheet may be a stretchable film formed by melting a thermoplastic elastomer resin such as urethane or styrene, a stretchable nonwoven fabric made of stretchable fibers, a stretchable film or a stretchable nonwoven fabric. A composite sheet or the like obtained by laminating a non-stretchable sheet that has been cut or weakened can be used.

  Further, instead of the stretchable sheet, the leg stretchable part 75 may be configured by arranging one or a plurality of thread-like / strip-like elastic members made of polyurethane elastic fiber or natural rubber.

  The leg expansion / contraction part 75 is disposed between the side flap 70 and the exterior sheet 60. Alternatively, in a region where the back sheet 60a disposed between the absorber 40 and the exterior sheet 60 is provided, the leg stretchable part 75 is disposed between the back sheet 60a and the side flap 70.

  The stretchable sheet constituting the leg stretchable part 75 has a width of at least 5 mm (width in the product width direction W in the natural state of the disposable diaper 10) and at least 45 mm, more preferably at least 12.5 mm and not more than 35 mm, at least in the crotch region 25 It is preferable. If it is less than 5 mm, the effect of lowering the load on the skin due to the elastic element does not appear because the force of tightening partially does not concentrate by following the wearer's leg around the surface, and if it exceeds 45 mm As compared with the length of the entire disposable diaper in the product width direction, the region along the leg circumference becomes too wide, and the stretchable sheet is easily wound around the wearer's body or turned up.

  The elongation rate of the leg stretchable part 75 is preferably 1.6 to 2.3 times. In this embodiment, the expansion ratio of the leg stretchable part 75 is set to 1.8 to 2.0 times. The elongation rate means the degree of elongation of the leg stretchable part, and is defined as follows.

Elongation rate = (length of leg stretchable part in stretched state) ÷ (length of leg stretchable part in natural state)
In addition, in this specification, this elongation rate shall be measured as follows, for example.

  1stly, when the disposable diaper 10 is enclosed with the package etc., the disposable diaper 10 is taken out from a package. Subsequently, the arrangement | positioning area | region of a leg expansion-contraction part is cut out. At this time, it cuts out also including the exterior sheet joined to a leg expansion-contraction part. The elongation rate of the leg stretchable part after cutting is measured, and the stretch rate of the leg stretchable part is measured.

  Each sample is left for 60 minutes in an atmosphere of 20 ° C. ± 2 ° C. and a relative humidity of 60% ± 5% RH, and the length of the leg stretch part is measured along the stretch direction. This length is defined as “the length of the leg expansion / contraction part in the natural state”.

  Secondly, the length in the stretch direction of the desired region in such a state (that is, the natural state), and the desired state when stretched from the natural state to a state where wrinkles due to the elastic member cannot be visually confirmed on the non-stretchable sheet Measure the length of the region in the stretch direction. This length is defined as “the length of the leg stretchable part in the extended state”.

  Using these measurement results, the elongation percentage is measured by calculating with the above formula.

  Further, the distance between the inner ends in the product width direction W of the pair of left and right leg expansion / contraction portions 75 becomes wider from the crotch region 25 toward the front waistline region 20, and as the distance from the crotch region 25 toward the rear waistline region 30 increases. And become wider. When wearing a diaper on the wearer's body, it is possible to make the leg stretchable part follow the body line more by placing the leg stretchable part in a shape that narrows at the crotch and spreads toward the front and rear waistline, A leg expansion-contraction part will be suitably extendedly arranged around a wearer's leg.

  Further, the distance (D1 in the figure) at the end of the front waistline region 20 of the pair of left and right leg stretchable parts 75 is the distance (D2 in the figure) at the end of the rear waistline area 30 of the pair of left and right leg stretchable parts 75. Narrower than. The interval is defined as the inner end in the product width direction W of the pair of left and right leg stretchable parts 75 after the disposable diaper 10 is expanded and held in the product longitudinal direction L and the product width direction W in a state where there is no wrinkle from the natural state. The distance between them is measured.

  The elongation of the skin surface of the wearer's body is particularly large in the buttocks, and is prominent at positions closer to the outside in the width direction. Further, the leg stretchable part 75 is in close contact with the wearer's body. Therefore, by setting D2> D1, even when the movement of the wearer is applied to the disposable diaper 10, the leg stretchable part 75 on the buttock side can be stretched while being in close contact, and even if the amount of change in stretch is large, the leg The elastic part 75 does not stretch. Therefore, the displacement of the disposable diaper 10 by the leg expansion / contraction part 75 can be suppressed.

  Moreover, the space | interval of a wearer's both legs is the shape where the crotch area is the narrowest, and it spreads toward the abdominal side or the back side from a crotch area. Since the leg opening and the leg stretchable part 75 have a shape extending from the crotch region toward the outside in the longitudinal direction toward the outside in the width direction, the leg circumference opening and the leg stretchable part 75 are arranged along the wearer's leg swing. Since it can arrange | position and can suppress local stress concentration, it can contact | adhere to a wearer with a comparatively low elongation rate, and it becomes possible to reduce the burden on skin.

  The leg stretchable part 75 is configured to bend and contract the disposable diaper along the wearer's leg. The product longitudinal direction end part of the leg expansion-contraction part 75 is arrange | positioned so that it may spread in the width direction, and is arrange | positioned in the vicinity of the trunk periphery holding part. Therefore, the product longitudinal direction end part of the leg expansion-contraction part 75 acts so that it may shrink | contract in the width direction with a trunk periphery holding | maintenance part. In the leg placement region where the leg stretchable part is placed, a mark part 31 is provided along the stretch direction of the leg stretchable part. The mark portion will be described in detail later.

  Next, the shape of the crotch expansion / contraction part 200 will be described. The crotch stretchable part 200 is configured to maintain a flat shape in a part of the crotch region when the disposable diaper is worn rather than the other part of the absorber 40. The crotch stretchable portion 200 is configured to be stretchable at least in the product longitudinal direction L or the product width direction W.

  The crotch stretchable part 200 is provided separately from the leg stretchable part 75 and overlaps the absorbent core 40a (in this embodiment, between the core wrap 40b that wraps the absorbent core 40a and the backsheet 60a). Position), 60% or more of the length in the width direction of the absorbent core 40a at the overlapping position is contracted. In this way, by shrinking the portion where the absorbent core 40a is disposed by the crotch stretchable portion 200, the absorbent core 40a shrinks, and it is easy to maintain a flat shape compared to the portion where the absorbent core 40a does not shrink. Become.

  On the other hand, the absorbent core 40a located in the front waistline region and the rear waistline region located on the outer side in the product longitudinal direction from the crotch stretchable portion 200 is not contracted by the crotch stretchable portion 200. Therefore, the crotch stretchable part 200 that is maintained in a flat shape on the crotch part of the disposable diaper in a state of being held around the waist and waist of the wearer by the fastening tape, without excessively adhering to the body, results in the crotch. The stretchable part 200 is appropriately placed along the body.

  In addition, when the crotch stretchable portion 200 is stretchable along the product longitudinal direction L, the front waistline region 20 and the back waistline region 30 are likely to stand up due to the shrinkage of the crotch stretchable portion 200. A flat crotch region can be formed along the body at the part.

  As a result, since the front waistline region 20 and the back waistline region 30 rise from the crotch stretchable part 200, the fit of the disposable diaper 10 to the wearer is improved.

  That is, the disposable diaper 10 can be stably mounted so that the crotch region 25 of the disposable diaper 10 is disposed in the crotch part of the wearer by the contraction of the crotch stretchable part 200.

  The crotch stretchable part 200 is preferably composed of a stretchable sheet.

  By configuring the crotch stretchable portion 200 with the stretchable sheet, the absorbent core 40a in the region where the stretchable sheet is disposed is uniformly shrunk, and it becomes easier to maintain a flat shape. The stretchable sheet can be constituted by a stretchable sheet similar to the leg stretchable part 75, for example.

  Further, instead of the stretchable sheet, the crotch stretchable portion 200 may be configured by arranging a plurality of thread-like or band-like elastic members made of polyurethane elastic fiber or natural rubber. In this case, in order to uniformly shrink the absorbent core 40a by the crotch expansion / contraction part 200, the interval between the elastic members is 7 mm or less, more preferably 5 mm or less. Moreover, in order to shrink the absorptive core 40a uniformly, it is desirable that the difference in the interval between adjacent elastic members is 2 mm or less.

Further, specifically, the elongation rate of the crotch stretchable part 200 is preferably 1.2 times or more and 1.8 times or less. In this embodiment, the expansion rate of the crotch expansion / contraction part 200 is set to 1.4 times. The elongation rate means the degree of elongation in the expansion / contraction direction (product longitudinal direction L) of the crotch expansion / contraction part 200 and is defined as follows. The elongation rate is defined in the expansion / contraction direction (product longitudinal direction L in the present embodiment). It means the degree of expansion of the crotch expansion / contraction part 200 and is defined as follows.

Elongation rate = (length in the expansion / contraction direction of the crotch expansion / contraction part 200 in the maximum expansion state) / (length in the expansion / contraction direction of the crotch expansion / contraction part 200 in the natural state)
In addition, in this specification, this elongation rate shall be measured as follows, for example.

  First, when the disposable diaper 10 is sealed in a package or the like, the disposable diaper 10 is taken out of the package, and in that state, the atmosphere is 20 ° C. ± 2 ° C. and relative humidity 60% ± 5% RH 60. Leave for a minute and measure the length of the crotch stretch along the stretch direction. This length is defined as “the length in the expansion / contraction direction of the crotch expansion / contraction part 200 in the natural state”.

  Second, the length in the stretch direction of the desired region in such a state (ie, the natural state), and the length in the stretch direction of the desired region when stretched from the natural state to a state where wrinkles by the elastic member cannot be visually confirmed. Measure the thickness. This length is defined as “the length in the expansion / contraction direction of the crotch expansion / contraction portion 200 in the maximum expansion state”.

  Using these measurement results, the elongation percentage is measured by calculating with the above formula.

  Thus, by making the elongation rate of the crotch stretchable part 200 1.2 times or more and 1.8 times or less, it is possible to suitably follow the stretch of the wearer's skin.

  For example, when the wearer takes a forward bending posture such that the front side of the body contracts, there is a portion that extends about 30% in the skin on the buttocks side of the wearer relative to the stretched body.

  In other words, when the expansion / contraction ratio of the crotch expansion / contraction part 200 is 1.2 times or less, the crotch expansion / contraction part 200 is not sufficiently contracted in the natural state, and compared to the case where the crotch expansion / contraction part 200 is not provided, disposable diapers The shrinkage of the absorber region at the 10 crotch is small, and it becomes insufficient to take a flat shape along the body at the wearer's crotch.

  On the other hand, if the expansion rate of the crotch expansion / contraction part 200 is larger than 1.8 times, the contraction dimension of the crotch expansion / contraction part 200 in the contraction direction becomes too large, so that the region where the crotch expansion / contraction part 200 exists is more than along the body. The disposable diaper 10 is likely to be in a close contact state, and easily displaced downward from the wearer.

  Moreover, the shrinkage | contraction amount in the product longitudinal direction L of the crotch expansion-contraction part 200 may be comprised so that it may become 2-8% of the length in the product longitudinal direction L of the disposable diaper 10. FIG.

  The amount of shrinkage is the length “b (mm)” in a stretched state so that the wrinkles are sufficiently small and the surface of the sample is almost smooth, and in the natural state in the direction along the stretching direction of the sample. It is the difference from the length “a (mm)” and can be calculated by (b−a).

  The present inventor assumes that the amount of shrinkage of the crotch stretchable part 200 in the product longitudinal direction L is 2 to 8% of the length of the disposable diaper 10 in the product longitudinal direction L, and the process of mounting the disposable diaper 10 on the wearer. In the above, it was confirmed that the crotch stretchable part 200 is preferably easily along the wearer's body.

  Here, when the amount of shrinkage of the crotch stretchable part 200 in the product longitudinal direction L is larger than 8%, the crotch stretchable part 200 is contracted too much, and the disposable diaper 10 is not sufficiently short in the product longitudinal direction L. It becomes difficult to attach the diaper 10 to the wearer's body, or the disposable diaper 10 and the wearer's body are in close contact with each other in the crotch region 25 and are likely to be displaced.

  On the other hand, if the amount of shrinkage of the crotch stretchable part 200 in the product longitudinal direction L is 2% or less, the effect itself of the crotch stretchable part 200 that brings the disposable diaper 10 closer to the wearer's body becomes difficult to manifest.

  In addition, the center of the crotch stretchable part 200 in the product longitudinal direction L is arranged closer to the front waistline region 20 than the center of the disposable diaper 10 in the product longitudinal direction L. Moreover, the crotch expansion / contraction part 200 is arrange | positioned so that the center of the disposable diaper 10 in the product longitudinal direction L may be straddled.

  In such a case, considering the rigidity of the absorbent core 40a and the rigidity of other members constituting the disposable diaper 10, the thickness of the elastic member to be used and the pitch to be arranged can be appropriately selected. It is preferable that the entire side edge portion in the product width direction W of the absorbent core 40a is in a contracted state in the stretched state.

  Further, a notch 115 (notch 125) is formed in the crotch region 25 of the absorber 40. The notch 115 and the notch 125 are regions where the absorbent core 40a constituting the absorber 40 is not present. In the present embodiment, the notch 115 and the notch 125 correspond to a low-rigidity part in which the basis weight of the absorbent core 40a is lower than other parts of the absorbent core 40a. Instead of forming the notch 115 and the notch 125, the area of the notch 115 and the notch 125 is set so that the basis weight of the absorbent core 40a is lower than the other parts of the absorbent core 40a. Also good.

  The notch 115 and the notch 125 exist along the edge of the crotch stretchable part 200 in the product longitudinal direction L. Even if the notch 115 and the notch 125 are formed, the absorbent core 40a located in the front waistline region 20 and the rear waistline region 30 is completely separated from the absorbent core 40a located in the crotch region 25. In particular, it is preferably continuous in the width direction.

  The notch 115 and the notch 125 have longer lengths in the product longitudinal direction L as they go outward in the product width direction W. With such a shape, the outer side of the absorbent core 40a in the product width direction W is more easily contracted, so that a flat “bottom” is more easily formed. Furthermore, the absorbent core 40a located closer to the front waistline region 20 than the notch 115 and the absorbent core 40a located closer to the rear waistline region 30 than the notch 125 rise from the "bottom part", and the wearer's Since it becomes easy to curve along the roundness of the body (abdomen and buttocks), the shape of the disposable diaper itself can be closer to the shape of the wearer's body.

  Further, the edge portion of the notch 115 (notch 125) near the front waistline region 20 (rear waistline region 30) has an arc shape. The edge of the notch 115 (notch 125) is shaped such that the center of the arc is located in the rear waistline region 30 (front waistline region 20) with respect to the edge. With such a shape, deformation along the roundness of the wearer's body is easier and more likely to occur.

  Here, the tension coefficient of the crotch expansion / contraction part 200 may be configured to be larger than the tension coefficient of the leg expansion / contraction part 75.

  The tensile coefficient is a coefficient that defines how much each part is easily stretched. For example, the tensile modulus can be calculated by the following method.

  First, from the product to be measured (disposable diaper 10), the part to be measured (crotch stretchable part 200 and leg stretchable part 75) is cut out as a sample as it is.

  Specifically, the non-stretchable member joined to the crotch stretchable part 200 and the leg stretchable part 75 is cut out. Here, in the area | region where the absorber is arrange | positioned, it cuts out with the absorber.

  Secondly, the cut sample is left in a natural state at 20 ° C. in a 60 RH atmosphere for 60 minutes without applying a tensile load.

  Third, a line L is drawn at the center position in the width direction perpendicular to the stretching direction along the stretching direction of the sample, and the length of the line L in the natural state is measured. At this time, a line L is drawn on a horizontal trapezoid as much as possible without applying a load to the sample, and the length of the line L is measured. Here, let the length of the line L be the initial length “A”.

  In addition, it is preferable to draw the line L so as to be as long as possible in the sample in order to reduce the measurement error, but it is necessary to prevent the line L from being overlapped with the portion sandwiched by the chuck of the next tensile tester. There is.

  Fourth, the tensile tester such as an autograph manufactured by Shimadzu Corporation holds both ends of the sample in the direction of expansion and contraction, and the sample is extended until a load of 0.8 N is applied. And measure the length of the line L in such a state as “A ′”.

  For example, in a tensile tester, the sample is pulled along the stretching direction of the sample at a pulling speed of 100 mm / min (pulling vertically upward with respect to the horizontal plane).

  Fifth, the tensile modulus is calculated by the following formula.

Tensile modulus = (A'-A) / A
Here, the end E2 on the front waistline region 20 side in the range that can be expanded and contracted in the leg stretchable part 75 is more than the end E3 on the front waistline region 20 side in the range that can be expanded and contracted in the crotch stretchable part 200. You may be comprised so that it may adjoin to the edge part E4 by the side of the front waist area 20 side.

  Further, the end E5 on the rear waistline region 30 side in the range that can be expanded and contracted in the leg stretchable part 75 is behind the disposable diaper 10 than the end E6 on the rear waistline area 30 in the range that can be expanded and contracted in the crotch stretchable part 200. You may be comprised so that it may adjoin to the edge part E7 by the side of the waist area 30. FIG.

  Thus, by defining the relationship between the tensile coefficient and the end portions E2 to E7, when the disposable diaper 10 is pulled in the product longitudinal direction L, the leg stretchable portion 75 is stretched while the crotch stretchable portion 200 is stretched. The state which does not carry out can be maintained.

  Subsequently, the folding aspect of the disposable diaper comprised in this way is demonstrated. The disposable diaper is configured to be folded in the product longitudinal direction after both end portions in the product width direction of the disposable diaper are folded inward in the product width direction from the expanded state shown in FIG. FIG. 5 shows the disposable diaper in a folded state. In the disposable diaper, both ends of the disposable diaper in the product width direction are folded inward in the product width direction with the first fold line FL1 along the product longitudinal direction as a base point. Next, the disposable diaper is folded into two in the product longitudinal direction with the second fold line FL2 along the product width direction as a base point. The first fold line is disposed on the outer side in the product longitudinal direction from the leg stretchable part 75 in the unfolded state. Therefore, in the unfolded state, a valley fold by the first fold FL1 is formed on the skin contact surface side of the disposable diaper on the outer side in the product width direction than the leg stretchable part.

  When wearing the disposable diaper configured in this way, the disposable diaper is developed so that the skin contact surface of the disposable diaper is on the top. Then, the wearer raises the leg of the wearer, lays a disposable diaper on the position corresponding to the buttocks of the wearer, and places the disposable diaper 10 below the wearer's buttocks according to the position (height) of the wearer. Lay on. Next, when the wear assistant pulls the disposable diaper 10 in the product longitudinal direction L, after the crotch stretchable part 200 and the absorbent body 40 approach the wearer's body (lower crotch), the leg stretchable part 75 Approaches the body (legs). Next, the wear assistant pulls the left and right fastening tapes 90 and engages them so as to be symmetrical. By wearing in this way, the disposable diaper can be worn on the wearer.

  However, since the disposable diaper is folded in the product longitudinal direction and the product width direction before use, folds along the product longitudinal direction and the product width direction are formed in the unfolded state. For this reason, even if the disposable diaper is once deployed, the portion developed from the crease base may be folded back to the original state and worn on the wearer in the folded state.

  In this way, when a part of the disposable diaper is caught between the body and the disposable diaper, the wearing assistant can pull out the part that is caught and place it at the correct position. At this time, the wearing assistant can correct the position of the leg expansion / contraction part by using the mark part 31 provided in the leg arrangement region as a guide.

  Next, the mark part 31 will be described in detail. The mark portion 31 is disposed in at least a part of the region where the leg stretchable portion is disposed, and is disposed so as to overlap the leg stretchable portion in the thickness direction. The leg stretchable part and the mark part 31 overlap in the thickness direction is not only the structure in which the leg stretchable part and the mark part 31 are in contact with each other, but also between the leg stretchable part and the mark part 31. In addition, a configuration in which other members are arranged and the leg stretchable part and the mark part 31 are indirectly overlapped is also included.

  The mark part 31 is arrange | positioned along the expansion-contraction direction of a leg expansion-contraction part. The expansion / contraction direction of the leg expansion / contraction part is the expansion / contraction direction of the leg expansion / contraction part 75, and in this embodiment, is the direction along at least one of the longitudinal direction of the leg expansion / contraction part 75 or the product longitudinal direction of the disposable diaper. Arranged along the stretch direction of the leg stretchable part means that the shape extends in at least one of the longitudinal direction of the leg stretchable part 75 or the product longitudinal direction of the disposable diaper, or the longitudinal direction of the leg stretchable part 75 or the product of the disposable diaper. It includes a configuration arranged side by side in a direction extending in at least one of the longitudinal directions.

  The mark part 31 is configured to be visible from the non-skin contact surface of the disposable diaper. Specifically, when the mark portion 31 is provided on the exterior sheet 60, the exterior sheet 60 itself becomes a non-skin contact surface of the disposable diaper, so that the mark portion 31 of the exterior sheet 60 is visible. I just need it. Further, when the mark portion 31 is provided on the back sheet 60a, since the exterior sheet is disposed on the non-skin contact surface side with respect to the back sheet 60a, the mark portion 31 is interposed via the exterior sheet 60. It only needs to be visible. Further, when the mark portion 31 is provided on the leg stretchable portion 75, the backsheet 60a and the exterior sheet 60 are disposed on the non-skin contact surface side with respect to the leg stretchable portion 75. And the mark part 31 should just be visually recognized via the exterior sheet | seat 60. FIG.

  Since the mark portion 31 is provided, it is easy for the wearing assistant to grasp the position of the leg stretchable portion via the mark portion 31. Therefore, it can be easily determined whether or not the position of the leg stretchable portion should be adjusted after being attached. Moreover, a leg expansion-contraction part is generally the same color as the sheet | seat material which comprises the exterior body of a disposable diaper, or the diameter and dimension are small, and it is hard to grasp | ascertain and recognize it visually. Further, when the leg stretchable part is stretched, it is buried in the contracted exterior body, and it is difficult to grasp the exact position of the leg stretchable part itself. However, by providing the mark portion 31, it can be easily determined whether or not the position of the leg expansion / contraction part should be adjusted after mounting, and when adjusting the position of the leg expansion / contraction part, the position of the leg expansion / contraction part is adjusted after the adjustment. Thus, it can be easily visually confirmed that the leg stretchable parts are correctly arranged.

  The mark part 31 according to the present embodiment is a flower mark mark pattern M31 provided on the exterior sheet 60. In a region other than the leg arrangement region of the disposable diaper, a decorative design M32 having a design different from the mark design M31 is provided. The decorative design M32 is configured to be visible from the non-skin contact surface of the disposable diaper. The mark design M31 and the decorative design M32 may be at least one of color, size, design, and pattern, and may have a similar relationship. In addition, the mark design and the decorative design are not limited to the floral design and the animal design, but may be dot-like or symbols, and the configuration is not limited.

  By providing the mark symbol M31 and the decorative symbol M32 so as to be visible from the non-skin contact surface of the disposable diaper, the decoration effect of the disposable diaper as a whole can be enhanced. Since the mark design M31 is different from the decorative design M32, the wearing assistant can grasp the mark design. The mark pattern may not be provided on the exterior sheet 60, may be provided on at least one of the exterior sheet 60 and the back sheet 60a constituting the exterior body, and constitutes a disposable diaper such as an absorbent body. It may be provided on another component member.

  The back sheet is a liquid-impermeable sheet and has a rectangular shape in a plan view in the extended state. The back sheet 60a extends outward in the product width direction from the outer end portion in the product width direction of the absorbent core 40a, and extends outward in the product longitudinal direction from the outer end portion in the product longitudinal direction of the absorbent core. ing.

  Both end portions in the product width direction of the backsheet 60a are outside in the product width direction than both end portions in the product width direction of the absorbent core 40a, and both end portions in the product width direction of the disposable diaper (both ends in the product width direction of the exterior sheet and the side flap) Part) in the product width direction. The product longitudinal direction both ends of the back sheet 60a are outside the product longitudinal direction both ends of the product longitudinal direction of the absorbent core 40a, and both the product longitudinal direction both ends of the disposable diaper (the product longitudinal direction both ends of the exterior sheet and the side flap) Part) in the product longitudinal direction. Both end portions in the product longitudinal direction of the backsheet 60a overlap with a part of the leg stretchable portion.

  A plurality of mark portions 31 are provided intermittently along the direction of expansion / contraction of the leg expansion / contraction portion. Since a plurality of legs are provided intermittently along the extension / contraction direction of the leg extension / contraction part, the extension / contraction direction of the leg extension / contraction part can be easily grasped, and the extension direction of the leg extension / contraction part can be arranged around the leg along the direction. .

Next, an example of the manufacturing method of the absorbent article which concerns on this embodiment is demonstrated. Note that an existing method can be used as a method not described in this embodiment. Moreover, the manufacturing method demonstrated below is an example and can also be manufactured with another manufacturing method. The manufacturing method of an absorbent article includes at least a component part forming step, a component part placing step, a leg periphery forming step, and a cutting step.
In the component part forming step, the component parts constituting the absorbent article are formed. Specifically, for example, the absorbent body 40 is molded by laminating absorbent materials, or the mark portion 31 is printed on the exterior sheet 60 or the back sheet 60a constituting the exterior body.

In the component mounting step, disposable diapers such as a stretchable sheet constituting the leg stretchable part 75, another web such as a web constituting the top sheet, a leakproof sheet, an absorber, etc. on the web constituting the backsheet The component which comprises 10 is mounted.
More specifically, the stretchable sheet constituting the leg stretchable part 75 is stretched, transferred to the intermittent drum while being further displaced in the width direction, and cut into individual product lengths on the intermittent drum. . The interval between the stretchable sheets is provided with the rotation of the intermittent drum, and the stretchable sheet is transferred onto a continuous web. In this way, the leg stretchable portions can be arranged in a curved line.

In the leg periphery forming step, the top sheet 50, the exterior sheet 60, and the back sheet 60a are cut along the outer end in the width direction of the leg stretchable part 75. Thereby, the leg opening part 35 arrange | positioned around a wearer's leg is formed.
In the cutting step, the continuous body on which the top sheet 50, the back sheet 60a, the absorber 40, and the like are arranged is cut into the size of one product along the product width direction W. Thereby, the disposable diaper 10 is manufactured.

  Although the contents of the present invention have been disclosed through the embodiments of the present invention as described above, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art.

  Subsequently, the disposable diaper which concerns on a modification is demonstrated based on FIG.6 and FIG.7. In the description of the modification, the same reference numerals are used for the same configurations as those in the embodiment, and the description is omitted. FIG. 6 is a developed rear view of the disposable diaper according to the first modification. The mark part 31 of the disposable diaper 10A according to Modification 1 is constituted by a mark pattern M31 provided in the leg arrangement region.

  The mark symbol M31 located on the left side in FIG. 6 has a dot shape and is provided at the outer end in the product width direction of the leg arrangement region. The outer end portion in the product width direction of the leg arrangement region is a region on the outer side in the width direction from the center in the width direction of the leg stretchable portion 75. The mark symbol M31 is arranged along the shape of the outer end in the width direction of the leg stretchable part 75. The outer end portion in the product width direction of the leg arrangement region is a portion arranged on the outermost side around the leg. By providing the mark portion 31 at the position of the product width direction end of the leg stretchable part, it is possible to more easily grasp whether or not the position of the leg stretchable part has been accurately corrected when the position of the leg stretchable part is corrected. .

  The mark symbol M31 located on the left side in FIG. 6 is continuously provided along the expansion / contraction direction of the leg expansion / contraction part. The configuration continuously provided along the expansion / contraction direction of the leg expansion / contraction part is a straight line or a curve extending in the expansion / contraction direction, as long as a part of the mark part 31 extends in the expansion / contraction direction, and other parts. May include a straight line or a curve extending in a direction other than the stretching direction.

  Since it is provided continuously along the expansion / contraction direction of the leg expansion / contraction part, the expansion / contraction direction of the leg expansion / contraction part can be easily grasped, and the extension direction of the leg expansion / contraction part can be arranged around the leg along the direction.

  FIG. 7 is a developed rear view of the disposable diaper 10B according to the second modification. The mark part 31 located on the left side in FIG. 7 is a colored region colored in the leg stretchable part.

  The mark part 31 located on the right side in FIG. 7 is constituted by a dot-like mark pattern M31 provided on the back sheet. The mark pattern M31 is disposed along the end of the back sheet in the product width direction.

  Generally, the back sheet is not arranged in an extended state as compared with other elastic member elements. Therefore, for example, even when a mark portion is provided on the backsheet and a mark portion having the same or similar shape is provided on the other elastic member elements, the mark portion of the non-stretchable backsheet and the stretchable state It is easy to cause a change in the impression of the mark portion between the mark portion of the elastic member element. Therefore, it is possible to make it easier for the wearing assistant or the like to recognize the mark portion of the leg arrangement region.

  Note that the mark symbol M31 according to the modified example 2 is provided in the leg arrangement area and the area outside the leg arrangement area. As described above, the mark portion may be provided not only in the leg arrangement area but also in an area other than the leg arrangement area.

  It goes without saying that the present invention includes various embodiments not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

10: disposable diapers
20: Front waist area
25: Inseam
30: Rear waist area
31: Marking part
35: Leg opening
40: Absorber
40a: Absorbent core
40b: Core wrap
50: Top sheet
60: exterior sheet
60a: Back sheet
70: Side flap
71: Elastic member
75: Leg stretchable part
75I: Inner edge area in the width direction
80: Legside gather
81: Joint part
81A: First joint
81B: Second joint part
82: Free end portion
84: Contraction
85: waist elastic part
90: Fastening tape
91: Base sheet
92: Hook sheet
95: Target section
110: Notch
115: Notch
125: Notch
200: Crotch expansion / contraction part
FL1: First fold
FL2: Second fold
L: Product longitudinal direction
M31: Marking symbol
M32: Decoration pattern
W: Product width direction

Claims (7)

A front waistline region, a back waistline region, a crotch region located between the front waistline region and the back waistline region;
Product longitudinal direction from the front waistline region to the rear waistline region,
A product width direction orthogonal to the product longitudinal direction;
A pair of leg openings,
An absorber extending across at least one of the front waistline region and the rear waistline region across the crotch region;
A pair of leg stretchable parts formed so as to extend from the front waistline area to the rear waistline area across the crotch area along the leg opening.
A disposable diaper in which the outer end in the product width direction of the disposable diaper is folded toward the inner side in the product width direction through a fold located on the inner side in the product width direction than the leg stretchable part,
In the leg placement area where the leg stretchable part is placed, a mark part is provided along the stretch direction of the leg stretchable part,
The said mark part is a disposable diaper provided so that visual recognition is possible from the non-skin contact surface of the said disposable diaper. Further comprising an exterior body positioned on the non-skin contact side with respect to the leg stretchable part and the absorber,
In the leg arrangement region of the exterior body, a mark design constituting the mark portion is provided,
The disposable diaper according to claim 1, wherein a decorative pattern having a pattern different from the mark pattern is provided in an area other than the leg arrangement area of the exterior body.   The disposable diaper according to claim 1, wherein the mark portion is a colored region colored on the leg stretchable portion.   The disposable diaper according to any one of claims 1 to 3, wherein the mark portion is continuously provided along a direction of expansion and contraction of the leg expansion / contraction portion.   The disposable diaper according to any one of claims 1 to 3, wherein a plurality of the mark portions are provided intermittently along the extension / contraction direction of the leg extension / contraction portion.   The disposable diaper according to any one of claims 1 to 5, wherein the mark portion is provided at an outer end portion of the leg arrangement region in the product width direction. In the crotch region is formed in an absorber arrangement region where the absorber is arranged, and includes at least a crotch expansion / contraction portion that can expand and contract in the product longitudinal direction,
The disposable diaper in any one of Claims 1-6 comprised so that the tension coefficient of the said crotch expansion-contraction part may become larger than the tension coefficient of the said leg expansion-contraction part.

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