CN106456404A - disposable diapers - Google Patents

Abstract

An unfolding-type disposable diaper (1) for an infant having a weight of 3000g or less, which has a longitudinal direction, a width direction, and a thickness direction that are orthogonal to each other, and which is provided with a front waist region (1a), a crotch region (1b), and a rear waist region (1c), the unfolding-type disposable diaper (1) comprising: an absorbent body (4); a pair of fixing members (10) extending from the rear waist region (1c) outward in the width direction; a leg-surrounding stretchable member (6) which is provided along a pair of leg-surrounding openings (HL) formed by fixing a pair of fixing members (10) to the front waist region (1a) and which is provided further to the outside in the width direction than the absorber (4); and a target indication section (15) for indicating a position at which the pair of fixing members (10) is to be fixed to the front waistline region (1a), the absorbent body (4) being provided with an overlap region (a) in the longitudinal direction in which the absorbent body (4) overlaps the target indication section (15) in the thickness direction, and the length (L1) in the width direction of the target indication section (15) being equal to or less than the maximum length (L2) in the width direction of the absorbent body (4) within the overlap region (a).

Description

disposable diapers

technical field

The present invention relates to an unfolded disposable diaper for babies whose body weight is less than 3000 g.

Background technique

The unfolded disposable diaper is brought into contact with the wearer's body, and then secured to the wearer by securing a pair of fastening straps (fixing members) to the front waist region; Extends toward the outer side in the width direction. Some disposable diapers have an integral outer sheet that is secured by straps. However, this type of disposable diaper does not have a front target belt serving as an inducer of a position where the fixing belt is fixed, and thus is difficult to be worn. And, the following disposable diapers have been proposed: in the disposable diapers, target prints (for example, numbers or patterns) serving as inducers of positions where the fixing tape is fixed can be seen through the outer sheet (for example, see Patent Literature 1).

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2002-253608

Contents of the invention

The problem to be solved by the invention

For wearers of various sizes, target prints are generally printed extending to both ends in the width direction of the front waist region. However, for a baby weighing less than 3000 g, the user wants to loosely wear the disposable diaper on the baby and easily fix the fixing belt to both ends of the front waist region according to the position of the target print. In this case, a gap is formed in the waist opening and/or the leg opening, so that there is a problem that leakage of excrement easily occurs.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to suppress leakage of excrement from an unfolded type disposable diaper for babies weighing 3000 g or less.

solutions to problems

An aspect of the present invention for achieving the above object is a disposable diaper for babies whose body weight is 3000 g or less, the disposable diaper has a length direction, a width direction, and a thickness direction orthogonal to each other, and the The disposable diaper is an unfolded disposable diaper including a front waist region, a crotch region and a rear waist region, and the disposable diaper includes: an absorber; a waist area extending toward the outside in the width direction; leg elastic members respectively along a pair of leg openings formed by fixing the pair of fixing members to the front waist area provided, and the leg circumference elastic member is disposed on the outer side in the width direction than the absorber; and a target indicating portion indicating that the pair of fixing members are to be fixed to the front the position of the waist region, the absorbent body has an overlapping area in the longitudinal direction in which the absorbent body overlaps the target indicating portion in the thickness direction, and the target indicating portion The length in the width direction is equal to or less than the maximum length in the width direction of the absorber in the overlapping region.

Other characteristics of the present invention will become apparent from the description in this specification and the accompanying drawings.

The effect of the invention

According to the present invention, leakage of excrement from the unfolded disposable diaper for babies whose body weight is 3000 g or less can be suppressed.

Description of drawings

Fig. 1 is a schematic plan view of the wearer's skin side of a disposable diaper.

Fig. 2 is a schematic plan view of the non-skin side of the disposable diaper.

3A to 3C are cross-sectional views of the disposable diaper at positions AA, BB and CC of FIG. 2, respectively.

Fig. 4 is a schematic perspective view of the disposable diaper when worn.

5A is an explanatory diagram of a state where the fixing belt is fixed to the outer end in the width direction of the front waist region, and FIG. 5B is an explanatory diagram of a state where the fixing belt is fixed to the center of the width direction of the front waist region.

6A and 6B are explanatory diagrams of postures of low-birth-weight infants.

Fig. 7 is a view for explaining a folded state of a sheet member positioned between an absorbent core and a leg circumference elastic member.

Fig. 8 is an explanatory diagram of a state in which fixing belts are fixed to each other.

FIG. 9 is an explanatory diagram of a method of measuring a fixing force.

detailed description

At least the following matters will be clarified by the description in this specification and the drawings.

Disposable diaper for babies whose body weight is less than 3000g, said disposable diaper has length direction, width direction and thickness direction orthogonal to each other, and said disposable diaper includes front waist region, crotch region and an unfolded disposable diaper of a rear waist region, the disposable diaper comprising: an absorbent body; a pair of fixing members extending from the rear waist region toward the outside in the width direction; legs the leg circumference elastic members are arranged respectively along the pair of leg openings formed by fixing the pair of fixing members to the front waist region, and the leg circumference elastic members are arranged to an outer side in the width direction than the absorbent body; and a target indicating portion indicating a position where the pair of fixing members are to be fixed to the front waist region, the absorbent body having the an overlapping region in the longitudinal direction, in which the absorber and the target indication portion overlap in the thickness direction, and the length of the target indication portion in the width direction is the overlapping The maximum length in the said width direction of the said absorber in a region is less than or equal to.

With this disposable diaper, since the absorber is laminated on the target display portion in the thickness direction, the user can be induced to fix the fixing member to the central portion in the width direction of the front waist region. Fixing the fixing member to the center portion in the width direction of the front waist region makes the waist opening and the leg opening smaller, thereby making it possible to suppress leakage of excrement from the openings. Also, even if the wearer is in an M-shaped posture in which the legs are largely bent in an M-shape with both knees reaching the abdomen, the wearer's legs do not come into contact with the fixing member, thereby preventing the fixing member from coming off. As a result, leakage of excrement can be suppressed.

In this disposable diaper, a pair of three-dimensional gathers standing up on the wearer's side are provided along the length direction on both sides in the width direction, and the standing points of the three-dimensional gathers are located at the There is a corresponding position between the outer end in the width direction of the elastic region of the leg circumference elastic member and the outer end in the width direction of the absorber.

With this disposable diaper, the standing point of the three-dimensional pleats is in close contact with the wearer together with the absorber and the leg circumference elastic member, which can prevent the standing point from becoming flat. Therefore, excrement can be blocked by the raised three-dimensional pleats, and leakage of excrement can be suppressed.

In this disposable diaper, the standing point of the three-dimensional gathers is located on the outer side of the absorber in the width direction than the inner end of the elastic region in the width direction. end position.

In this disposable diaper, the position of the absorber is more stable than the position of the leg circumference elastic member which moves together with the wearer's legs. Therefore, if the standing point of the three-dimensional pleats is located closer to the absorber side than the leg circumference elastic member, the standing point of the three-dimensional pleats will be more stable. As a result, the three-dimensional pleats are allowed to stand up well, so that leakage of excrement can be suppressed.

In this disposable diaper, the absorber includes an absorber core and a covering material of the absorber core, and is provided with corresponding A length in the width direction of an inner end of the elastic region of the leg circumference elastic member in the width direction is equal to or greater than a length of the elastic region in the width direction.

According to this disposable diaper, the stretchable region can be suppressed from being pulled inward and flattened, and the stretchable region can be brought into close contact with the wearer's legs. Therefore, the fit with the wearer's legs is improved, so that leakage of excrement can be suppressed.

In this disposable diaper, the surface of one fixing member of the pair of fixing members on one side in the thickness direction and the surface of the other fixing member on the other side in the thickness direction can be separated by A fixing force of 0.1N/10mm or more is fixed to each other.

With this disposable diaper, the fixing member can be fixed at a position near the center in the width direction of the front waist region, which can make the waist opening and the leg opening smaller. Therefore, if an extremely small low-weight baby wears a diaper, leakage of excrement can be suppressed.

===General Structure of Disposable Diapers===

The disposable diaper of the present embodiment is an unfolded disposable diaper for babies whose body weight is 3000 g (gram) or less (hereinafter referred to as low-birth-weight baby), and is particularly suitable for low-birth-weight babies whose body weight is less than 2500 g. Diapers suitable for very low birth weight infants weighing less than 1500g and ultra-low birth weight infants weighing less than 1000g.

Fig. 1 is a schematic plan view of the wearer's skin side (inside) of the disposable diaper 1 when the disposable diaper 1 is unfolded and stretched. Fig. 2 is a schematic plan view of the non-skin side (outer side) of the disposable diaper 1 when the disposable diaper 1 is unfolded and stretched. 3A to 3C are cross-sectional views of the disposable diaper 1 at positions AA, BB and CC of FIG. 2 , respectively. Fig. 4 is a schematic perspective view of the disposable diaper 1 when worn. As shown in the figure, the disposable diaper 1 has a length direction, a width direction, and a thickness direction orthogonal to each other, and the disposable diaper 1 includes: a front waist region 1a, which covers the abdomen of a wearer; a rear waist region 1c, which covering the back side of the wearer; and a crotch region 1b disposed at a position between the front waist region 1a and the rear waist region 1c.

As shown in FIG. 3 , the disposable diaper 1 includes an absorber 4 positioned between a liquid-permeable topsheet 2 and a liquid-impermeable backsheet 3 . The absorbent body 4 includes an absorbent core 41 and a liquid-permeable covering material 42 . The absorbent core 41 (composed of a material such as pulverized pulp or superabsorbent polymer) extends lengthwise from the front waist region 1a to the rear waist region 1c, and absorbs and holds excrement. A wrapping material 42 (for example, a tissue sheet or a spunbonded nonwoven fabric) wraps the absorbent core 41 . In the present embodiment, the planar shape of the absorber 4 is a rectangle, and the planar shape of the absorber core 41 is an hourglass shape with a narrow central portion in the longitudinal direction. On the non-skin side of the back film 3, an exterior sheet 5 (for example, nonwoven fabric) is formed, and the exterior sheet 5 constitutes the exterior of the entire disposable diaper 1 . In order to improve the proportion of the wearer's waist, it is preferable to form an elastic member capable of expanding and contracting in the width direction (for example, an elastic sheet member and a threaded elastic member) in the rear waist region 1c, but not shown in the figure. show.

In the rear waist region 1c, a pair of fixing belts 10 (fixing members) extending to both outer sides in the width direction are provided. As shown in FIG. 2 , in the front waist region 1 a located on the non-skin side surface of the outer sheet 5 , a target zone 14 having a rectangular planar shape is formed. The base material 11 of the fixing belt 10 includes a hook sheet 12 located on the skin side surface (ie, the surface facing the target belt 14 when the fixing belt 10 is folded to the front waist region 1a) in the thickness direction. On the other hand, on the non-skin side surface of the base material 11, the target sheet 13 is provided. A hook sheet 12 (e.g., a sheet of the male part with hook and loop fasteners) can be secured to a target sheet 13 and a target belt 14 (e.g., a sheet of female part with hook and loop fasteners or a non-woven fabric) and It can be detached from the target sheet 13 and the target tape 14 . It should be noted that the fixing belt 10 may be directly fixed to the outer sheet 5 without being fixed to the target belt 14 . In addition, the material of the target sheet 13 may be different from that of the target tape 14 .

In the front waist area 1a of the non-skin side surface of the back film 3, a target indication portion 15 (for example, a rectangle coated with a color different from that of the surrounding area, the area shown by the oblique lines in FIG. 2 ) is printed. ), the target display unit 15 indicates the position where the pair of fixing belts 10 should be fixed in the front waist region 1a. The outer sheet 5 and the target tape 14 arranged on the non-skin side of the target indicating portion 15 are members through which the target indicating portion 15 can be seen from the outside. In the present embodiment, the size of the target zone 14 is larger than the size of the target display portion 15 . However, the present invention is not limited thereto. The size of the target band 14 may be equal to the size of the target display portion 15 .

When wearing the disposable diaper 1, first, the disposable diaper 1 is folded in half in the longitudinal direction while being in contact with the wearer. Then, the pair of fixing belts 10 and their surrounding areas are folded toward the center side in the width direction, and the pair of fixing belts 10 are fixed to the target belt 14 of the front waist region 1a. Thus, as shown in FIG. 4 , a waist opening HB and a pair of leg openings HL are formed.

As shown in FIG. 1 , in the expanded and stretched disposable diaper 1 , the center portion in the longitudinal direction is narrow, and both side edges in the width direction of the crotch region 1b are curved in an arc shape. This curved portion becomes a pair of leg openings HL when the diaper 1 is worn. In addition, in the disposable diaper 1, along the pair of leg openings HL (in the present embodiment, along the longitudinal direction), there are provided the absorber 4 on both outer sides in the width direction. Stretchable leg surrounds stretchable member 6. The leg circumference elastic member 6 is fixed between the three-dimensional gather sheet 21 (to be described later) and the back film 3 and the outer sheet 5 while being stretched in the length direction. Therefore, when no external force acts on the disposable diaper 1, the leg circumference elastic member 6 shrinks, and leg circumference gathers are formed in the peripheral part of the leg circumference opening HL, which fits the wearer's leg circumference.

In this embodiment, the leg circumference elastic member 6 is made of an elastic sheet member (for example, a film-shaped elastic fiber or an elastic film made of molten thermoplastic elastomer resin such as urethane or styrene). stretchable non-woven fabric). However, the present invention is not limited thereto. For example, the leg-hole elastic member 6 may be composed of a plurality of threaded elastic members (for example, threaded elastic fibers made of polyurethane or threaded natural rubber) arranged at intervals in the width direction.

On both sides in the width direction of the disposable diaper 1 (skin-side surface of the front sheet 2), a pair of three-dimensional gathers 20 standing from the skin side (wearer side) are provided along the longitudinal direction. Each three-dimensional gather 20 includes a three-dimensional gather sheet 21 and a three-dimensional gather elastic member 22 . As shown in FIG. 3 , the outer end in the width direction of the three-dimensional gather sheet 21 coincides with the outer end in the width direction of the outer sheet 5 . On the other hand, the end 21a on the central side in the width direction of the three-dimensional gathers sheet 21 is folded toward the front sheet 2 (non-skin side) and becomes two layers, and the three-dimensional gathers elastic member 22 (for example, thread shaped stretchable member; in this embodiment, two stretchable members) are arranged between the two-layer three-dimensional gather sheet 21. The three-dimensional gathers elastic member 22 is extended in the longitudinal direction and fixed to the three-dimensional gathers sheet 21 .

As shown in FIG. 1 , the three-dimensional gathers sheet 21 is joined to the front sheet 2 at the first joining portion 23 and the second joining portion 24 (for example, a region coated with a hot-melt adhesive). The 1st junction part 23 is provided in the both ends of the longitudinal direction of the three-dimensional gathers sheet 21 and the surface sheet 2, and is located in the center side of the width direction rather than the 2nd junction part 24. As shown in FIG. In this embodiment, in each end portion in the longitudinal direction of each three-dimensional gathers 20 , three first joining portions 23 are arranged side by side in the width direction. The second joining portion 24 extends from one end to the other end in the longitudinal direction of the three-dimensional gathers sheet 21 and the front sheet 2 . Thus, the three-dimensional gathers sheet 21 between the first junctions 23 at both ends in the longitudinal direction is erected from the front sheet 2 toward the skin side by the contraction force of the three-dimensional gathers elastic member 22; In this case, the second joining portion 24 serves as a standing point where the three-dimensional gather sheet 21 stands up.

The disposable diaper 1 of this embodiment is used for low-weight babies. Therefore, it is preferable to set the product size as follows: in the state where the product is stretched without wrinkles, specifically, when the size of the components (for example, the outer sheet 5) constituting the disposable diaper 1 is stretched Measure the product size in a state that is approximately the same as the initial size of the part itself. The product length in the longitudinal direction when the product is stretched in the longitudinal direction is in the range of 210 mm to 330 mm. More specifically, it is preferred that the product length is 310mm for infants weighing less than 2500g, 270mm for infants weighing less than 1500g and 230mm for infants weighing less than 1000g. The waist size (circumference of the waist opening HB) ranges from 160mm to 295mm. More specifically, it is preferred that the waist size for infants weighing less than 2500 g be 273.5 mm, and that for infants weighing less than 1500 g be 220 mm. The waist size is a size in a state where the top end in the width direction of one of the fastening tapes 10 coincides with the root side end in the width direction of the hook sheet 12 of the other fastening tape 10 . That is, when an elastic member is provided for the waist circumference, the waist size is a size in a state where the product is stretched in the width direction.

===Specific Issues for Low Birth Babies===

5A is an explanatory diagram of a state in which the fixing belt 10 is fixed to the outer end in the width direction of the front waist region 1a, and FIG. 5B is an explanatory diagram of a state in which the fixing belt 10 is fixed to the center in the width direction of the front waist region 1a. . 6A and 6B are explanatory diagrams of postures of low-birth-weight infants. When a user wants to loosely put on the disposable diaper 1 for a baby whose weight is less than 3000 g, as shown in FIG. 5A , the fixing belt 10 is easily fixed to the outer end in the width direction of the front waist region 1 a. The circumferences of the waist opening HB and the leg opening HL are larger in this case than in the case where the fixing belt 10 is fixed to the central portion in the width direction of the front waist region 1 a as shown in FIG. 5B . In particular, since a low-weight baby whose birth weight is less than 2500 g is delivered before fat is formed on the body, the low-weight baby has a thinner trunk and legs than general newborn babies. Therefore, as shown in FIG. 5A, if the disposable diaper 1 is loosely worn by a baby, a gap is more likely to be formed in the waist opening HB and/or the leg opening HL.

As shown in FIGS. 6A and 6B , the low-weight baby maintains the following posture (hereinafter referred to as positioning posture): the posture that the baby takes in the mother's womb, that is, the baby's back 30 is curved in a C-shaped circle, and the baby The legs 31 of the infant are stretched in an M-shape with the baby's knees almost largely bent to the abdomen. Therefore, gap h1 is easily formed between the back part 30 and the disposable diaper 1 . If the fixing belt 10 is fixed to the outer end portion in the width direction of the front waist region 1a ( FIG. 5A ), the leg opening HL faces outward in the width direction, and the leg gathers are located at the thin part of the thigh and not at the the base of the thigh. Therefore, it is easier to form a gap. If the low-weight baby is in the positioning posture, the leg opening HL facing outside in the width direction is arranged near the central portion in the width direction and pulled toward the baby's abdomen. In this case, a gap h2 is easily formed between the rear side of the leg portion 31 and the disposable diaper 1 . Therefore, if a gap is formed between the disposable diaper 1 and the wearer, excrement will leak from the gap.

If the fixing belt 10 is fixed to the outer end in the width direction of the front waist region 1a, as shown in FIG. A force acting on the strap 10 and its surrounding area causes them to disengage and roll towards the ventral side. In this case, it is possible that the fixation belt 10 becomes detached from the target belt 14, which would result in leakage of excrement.

Therefore, an object of the present embodiment is to suppress leakage of excrement from the unfolded disposable diaper for babies whose body weight is 3000 g or less.

===Target Representation Unit 15===

In the disposable diaper 1 of the present embodiment, the absorber 4 is provided closer to the center side in the width direction than the leg circumference elastic member 6, and as shown in FIG. 2 , the absorber 4 has an overlapping region A in the longitudinal direction. , in the overlapping area A, the absorber 4 overlaps the target display portion 15 in the thickness direction. The overlapping area A is an area indicating a position in the length direction. One end A1 of the overlapping area A coincides with the end 15a of the target display portion 15 located on the rear waist area 1c side in the longitudinal direction, and the other end A2 of the overlapping area A coincides with the front waist area 1a of the absorbent body 4 in the longitudinal direction. The ends 4a of the sides coincide. In the disposable diaper 1 of this embodiment, the length L1 of the width direction of the object indication part 15 is smaller than the length L2 of the width direction of the absorber 4 in the overlapping area A. Since the center position CL in the width direction of the target indication part 15 is aligned with the center position CL in the width direction of the absorber 4, the end 15b on the outer side in the width direction of the target indication part 15 is smaller than that of the absorber 4 in the overlapping area A. The end 4b on the outer side in the width direction (on the same side in the width direction) is closer to the inner side in the width direction (nearer the center side).

Therefore, when the user sees that the target display portion 15 is housed on the inner side in the width direction (nearer the center side) than the absorber 4 located in the center portion in the width direction, the user is induced to fix the fixing belt 10 to the front waist region 1a. The central part of the width direction (Figure 5B). Therefore, for a low-weight baby for whom the user wants to wear the diaper loosely, the fixing belt 10 can be prevented from being fixed to the widthwise outer end of the front waist region.

By fixing the fixing belt 10 to the center portion in the width direction of the front waist region 1a, the circumferences of the waist opening HB and the leg opening HL can be made small. This suppresses the formation of gaps between the wearer and the respective openings HB and HL, so that leakage of excrement can be suppressed. Also, as shown in FIG. 5B , this enables the leg opening HL to face forward. That is, compared with FIG. 5A , the leg opening HL is located closer to the center side in the width direction and can be opened in the thickness direction. Thus, the orientation of the legs of the low birth weight infant in the positioning position coincides with the orientation of the leg opening HL, and the leg opening elastic member 6 extending along the leg opening HL evenly conforms to the outer circumference of the wearer's legs. In addition, the leg circumference elastic member 6 does not fit the thin part of the wearer's thigh, but fits the base of the thigh. This suppresses the formation of a gap around the leg opening HL, thereby making it possible to suppress leakage of excrement from the leg opening HL. In addition, if the leg-hole elastic member 6 fits the base of the thigh and does not easily move with the thigh, this can stabilize the position of the leg-hole elastic member 6 . This, so to speak, can also suppress leakage of excrement.

By fixing the fixing belt 10 to the widthwise central portion of the front waist region 1a, the legs of the low birth weight baby in the positioning posture do not come into contact with the fixing belt 10, thereby preventing the fixing belt 10 from coming off the target belt 14. As a result, leakage of excrement can be suppressed. In addition, since the fixing belt 10 is a relatively rigid member, if the fixing belt 10 does not come into contact with the legs of a low-birth-weight baby whose skin is weak, roughening of the low-birth-weight baby can be prevented.

The fixing tape 10 is fixed to a region where the absorber 4 and the target tape 14 overlap within the target tape 14 by the target display portion 15 accommodated on the inner side (central side) in the width direction than the absorber 4 . As a result, the fastening belt 10 is subjected to a force to disengage and roll the fastening belt 10 through the relatively rigid absorber 4 from the legs of the low-weight infant in the positioning position. Thus, the force applied to detach and roll the fixing tape 10 is absorbed by the absorber 4 , which further makes it difficult to detach the fixing tape 10 from the target belt 14 .

For low birth weight infants, it is desirable to avoid touching the infant's body as much as possible (so-called minimum handling) in order to stabilize breathing or to prevent cerebral hemorrhage. Therefore, reducing the number of times of changing the disposable diaper 1 for low birth weight infants by suppressing the leakage of excrement from the diaper 1 reduces the burden on nurses and mothers, and is also effective in maintaining the life of low birth weight infants.

The length L1 of the width direction of the object indication part 15 may be equal to the length L2 of the width direction of the absorber 4 in the overlapping area A. That is, the length L1 is less than or equal to the length L2 and the end 15b on the outside in the width direction of the object indicating portion 15 may be connected to the outside in the width direction (on the same side in the width direction) of the absorber 4 in the overlapping area A. It is sufficient that the end 4b of the line is consistent. In this case, since the user can also be induced to fix the fixing belt 10 to the central portion in the width direction of the front waist region 1a, the above-mentioned effect can be obtained.

Since the planar shape of the absorber 4 of the present embodiment is a rectangle, the length in the width direction of the absorber 4 is the same at all positions in the longitudinal direction. However, the present invention is not limited thereto, and the length in the width direction of the absorbent body 4 may be changed according to a change in position in the length direction. In this case, the length in the width direction of the target display portion 15 is equal to or less than the maximum length in the width direction of the absorber 4 in the overlapping region A, so that the fixing belt 10 can be fixed in the width direction of the front waist region 1a. of the central part.

In FIG. 2 , a rectangle coated with printing in a color different from that of the surrounding area is used as the target indicating portion 15 . However, the present invention is not limited thereto. The object display portion 15 may be any printed item such as numerals, characters, lines, patterns, or ellipses. In this case, the length in the width direction of the object indicating portion 15 means the distance from the outline portion printed at the position closest to one side in the width direction to the length printed on the other side closest to the width direction. The length in the width direction of the outline part at the position. In addition, it is not necessary to print the target indicating portion 15 on the backside film 3 , and the target indicating portion 15 may be printed on the outer sheet 5 or the target tape 14 . In addition, it is not necessary to form the target display portion 15 by printing, and an area provided with a material different from that of the surrounding area may be used as the target display portion 15 . For example, a target band 14 having a color different from that of the surrounding area may be used as the target display portion 15 .

Furthermore, the center position CL in the width direction of the target indication portion 15 does not necessarily have to be aligned with the center position CL in the width direction of the absorber 4 due to manufacturing errors and the like. In this case, the end 15b on one side in the width direction of the target display portion 15 is located on the outer side in the width direction than the end 4b on one side in the width direction of the absorber 4 in the overlapping region A. However, even in this case, if the length in the width direction of the target display part 15 is set to be equal to or less than the maximum length in the width direction of the absorber 4 in the overlapping area A, the target display part 15 will The end 15b on the other side on the top is located on the inner side in the width direction (closer to the center side) than the end 4b on the other side in the width direction of the absorber 4 in the overlapping region A. In addition, the end 15b on one side in the width direction of the target indication portion 15 does not protrude beyond the end 4b on one side in the width direction of the absorber 4 . Therefore, the same effects as those described above can be obtained.

===Leg stretchable member 6===

In the disposable diaper 1 of the present embodiment, a pair of leg circumference elastic members 6 are provided on both outer sides in the width direction than the absorber 4 . More specifically, the innermost (centralmost) end 6a in the width direction of the leg circumference elastic member 6 is further outside in the width direction than the outermost end 4a in the width direction of the absorber 4 . In other words, since the leg circumference elastic member 6 is provided in the sheet member (the three-dimensional gather sheet 21, the back surface film 3, and the outer sheet 5) which is less rigid than the absorber 4, the leg circumference elastic member 6 and the to-be A space is formed between the absorbent body 4 that is in close contact with the wearer. Thus, a puff sleeve-like shape is formed. Therefore, since the absorbent body 4 is kept in close contact with the wearer's body, the leg circumference elastic member 6 follows the movement of the wearer's legs due to the flexibly movable sheet member positioned between the elastic member 6 and the absorbent body 4 . Therefore, the wearer easily moves the legs and takes a positioning posture (the leg opening HL easily faces forward). In other words, even when the wearer is in the positioning posture, the leg circumference elastic member 6 can maintain a state in which it fits the wearer's legs while suppressing wrinkling of the absorbent body 4 . Therefore, leakage of excrement can be suppressed. In addition, since excrement can be held in the space formed between the absorber 4 and the leg-hole elastic member 6, it can be said that leakage of excrement can be suppressed.

Moreover, in the disposable diaper 1 of this embodiment, as shown in FIG. The length in the width direction of the end 6 a on the inner side (near the center side) in the width direction of the leg circumference elastic member 6 of one side) is defined as length L3. In addition, the length L3 is longer than the length L4 in the width direction of the leg circumference elastic member 6 . Therefore, the length of the movable sheet member (for example, the three-dimensional gather sheet 21) positioned between the leg circumference elastic member 6 and the relatively rigid absorbent core 4a is long, and as described above, the wearer is easily positioned. posture. In addition, the leg circumference elastic member 6 is maintained in a state that fits the wearer's legs. Therefore, leakage of excrement can be suppressed.

Fig. 7 is a view for explaining a folded state of a sheet member (for example, three-dimensional gather sheet 21) positioned between the absorber core 41 and the leg circumference elastic member 6. For the purpose of illustration, components such as the covering material 42 of the absorbent body 4, the back film 3, and the exterior sheet 5 are omitted from the drawings. With the disposable diaper 1 of this embodiment, as described above, since the user is induced to fix the fixing belt 10 to the central part in the width direction of the front waist region 1a, as shown in FIG. 7, the three-dimensional gather sheet 21 It is easy to enter from the position of the absorber 4 , particularly from the position of the end 41 a on the outer side in the width direction of the highly rigid absorber core 41 to the inner side (central side) in the width direction. Therefore, if the length L3 in the width direction from the end 41 a on the outer side in the width direction of the absorbent core 41 to the end 6 a on the inner side in the width direction of the leg circumference elastic member 6 is smaller than that of the leg circumference elastic member 6 length L4 in the width direction, the leg circumference elastic member 6 is pulled inward (non-skin side) and flattened. In this case, the leg-hole elastic member 6 in the form of a sheet cannot come into face-to-face contact with the wearer's legs, thereby degrading the symmetry of the leg-hole opening HL, which causes leakage of excrement.

Therefore, it is preferable that, as in the disposable diaper 1 of the present embodiment, from the end 41 a on the outside in the width direction of the absorber core 41 to the end 6 a on the inside in the width direction of the leg circumference elastic member 6 The length L3 in the width direction of the leg opening elastic member 6 is equal to or less than the length L4 in the width direction of the leg circumference elastic member 6 . Therefore, as shown in FIG. 7, the three-dimensional gathers sheet 21 etc. are folded into a Z shape, and the area (elasticity area) provided with the leg circumference elastic member 6 is maintained as a plane (a plane perpendicular to the thickness direction). )form. This allows the leg-hole elastic member 6 to come into surface-to-surface contact with the wearer's legs, so that the proportionality of the leg-hole opening HL can be improved. Therefore, leakage of excrement is suppressed.

The planar shape of the absorber core 41 of this embodiment is an hourglass shape. Therefore, if the length in the width direction from the end 41a on the outside in the width direction of the absorber core 41 (the outside end 41a of the narrowed portion) to the end 6a on the inside in the width direction of the leg circumference elastic member 6 is The length is defined as the length L3, and it is sufficient that the length L3 is equal to or less than the length L4 in the width direction of the leg circumference elastic member 6 . Preferably, as shown in FIG. 2 , the length L5 in the width direction from the outermost end 41 a in the width direction of the absorbent core 41 to the inner end 6 a in the width direction of the leg circumference elastic member 6 is It is equal to or less than the length L4 in the width direction of the leg circumference elastic member 6 . This further allows the leg circumference elastic member 6 to be in positive ground surface contact with the wearer's legs.

The leg-hole elastic member 6 does not have to be an elastic sheet member, and the leg-hole elastic member 6 may be a plurality of screw-shaped elastic members arranged in the width direction. This can keep the elastic region provided with the plurality of thread-like elastic members in a planar form. In addition, a plurality of thread-shaped elastic members (elastic regions) can be in contact with the legs of the wearer. This can improve the proportionality of the leg opening HL.

In the production line of the disposable diaper 1, the unfolded disposable diaper 1 is folded in the width direction or the length direction. Therefore, it is preferable that the folded position in the width direction is a position where the leg-hole elastic member 6 does not exist. This prevents the sheet-shaped leg-hole elastic member 6 from having creases, and makes it easier for the leg-hole elastic member 6 to come into surface-to-surface contact with the wearer's legs. If the folding position is the outermost end 4 a in the width direction of the absorber 4 , as shown in FIG. 7 , the three-dimensional gather sheet 21 and the like are more easily folded in a Z-shape.

===Three-dimensional pleats 20===

In the disposable diaper 1 of this embodiment, as shown in FIG. 1 , the standing point of the three-dimensional gathers 20 is the second joint (on one side in the width direction) of the three-dimensional gathers sheet 21 and the front sheet 2. The inner (central side) end 24a of the portion 24 in the width direction. The inner end 24a in the width direction of the second joint part 24 is located (on one side in the width direction) and the end 6a (near the center side) in the width direction of the leg circumference elastic member 6 is in contact with the absorber. 4 between the ends 4a on the outer side (one side) in the width direction. In other words, the standing point of the three-dimensional gathers 20 is provided between the absorbent body 4 to be in close contact with the wearer's body and the leg circumference elastic member 6 to be in close contact with the wearer's legs. This can suppress the three-dimensional gathers 20 from flattening, thereby enabling the three-dimensional gathers 20 to block excrement. As a result, leakage of excrement can be suppressed. Especially, if the wearer is a low-weight baby in a positioning posture, it is easy to bring the disposable diaper 1 into close contact with the wearer. In this case, the standing point of the three-dimensional gathers 20 is provided in a flexibly movable sheet member (for example, three-dimensional gathers sheet 21) located between the absorbent body 4 and the leg circumference elastic member 6, that is, Set in a part that is easy to separate from the wearer. This enables the three-dimensional gathers 20 to stand up in the space between the absorber 4 and the leg-hole elastic member 6, and this is effective.

Note that the end 6b on the outside in the width direction of the leg circumference elastic member 6 is most likely to be in close contact with the wearer's leg. Therefore, if the standing point of the three-dimensional gathers 20 is set at least between the outer end 6b in the width direction of the leg circumference elastic member 6 (elasticity region) and the outer end 4a in the width direction of the absorber 4 time, the same effect as the above-mentioned effect can be obtained.

The leg circumference elastic member 6 to be in close contact with the wearer's legs is easily displaced and less rigid than the absorbent body 4 to be in close contact with the wearer's body. As shown in FIG. 1 , in the disposable diaper 1 of this embodiment, the standing point of one three-dimensional gather 20 (on one side in the width direction) (the inner end in the width direction of the second joining portion 24 ) 24a) Provided on the outer side (one side in the width direction) of the absorber 4 in the width direction than the end 6a (one side in the width direction) of the inner side of the leg circumference elastic member 6 in the width direction (one side in the width direction). side) on the end 4a side. In other words, the length L6 in the width direction from the standing point 24a of the stand-up gathers 20 to the end 4a on the outer side in the width direction of the absorber 4 is smaller than the length L6 from the standing point 24a of the three-dimensional gathers 20 to the leg circumference elastic member 6 Length L7 in the width direction of the end 6a on the inner side in the width direction. This stabilizes the position of the standing point 24a of the three-dimensional gathers 20, and also makes the three-dimensional gathers 20 stand up favorably. Therefore, leakage of excrement can be further reliably suppressed.

In this embodiment, the planar shape of the absorber core 41 which significantly affects the rigidity of the absorber 4 is an hourglass shape. However, the present invention is not limited thereto, and for example, the planar shape of the absorbent core 41 may be a rectangle. In this case, the standing point 24a of the three-dimensional gathers 20 can be provided closer to the outer end 41a in the width direction of the absorbent core 41 than the inner end 6a in the width direction of the leg circumference elastic member 6. . This can make the position of the standing point 24a of the three-dimensional gathers 20 more stable, and this allows the three-dimensional gathers 20 to stand up well.

===Fixing Strap 10===

Fig. 8 is an explanatory diagram of a state in which fixing belts are fixed to each other. As shown in Figure 1, the fixing belt 10 of the present embodiment comprises a hook sheet 12 and a target sheet 13 capable of being fixed to the hook sheet 12; the hook sheet 12 is arranged on the skin side surface (when the fixing belt 10 is fixed to the front waistline The area 1a is the surface facing the target belt 14), and the target sheet 13 is provided on the non-skin side surface. In the disposable diaper 1 of the present embodiment, as shown in FIG. 8, among the pair of fixing tapes 10, the surface of the fixing tape 10a on one side in the thickness direction (when the fixing tape 10a is folded to the front waist region 1a The surface facing the outer side when the fixing belt 10b is folded to the front waist region 1a can be fixed to the surface of the fixing belt 10b on the other side in the thickness direction (the surface facing the inner side when the fixing belt 10b is folded into the front waist region 1a). When wearing the diaper 1, first the hook sheet 12 of one fixing tape 10a is fixed to the center portion in the width direction of the target belt 14, and then the hook sheet 12 of the other fixing tape 10b is fixed to the target of one fixing tape 10a. Sheet 13.

Even if the fixing straps 10 cannot be fixed to each other, shifting the fixing position of the fixing strap 10 in the longitudinal direction enables the fixing strap 10 to be fixed at a position close to the center in the width direction of the front waist region 1a. In this case, however, gaps are formed in the leg opening HL or the absorbent body 4 is wrinkled, possibly allowing excrement to leak out. Therefore, as in the present embodiment, if the fixing belts 10 can be fixed to each other, the waist opening HB and the leg opening HL can be made small, and the absorber 4 can be prevented from being wrinkled. It is also possible to more reliably prevent the legs of the low-weight infant in the positioning posture from coming into contact with the fixing belt 10 . Even when the disposable diaper 1 is put on a small low-weight baby, leakage of excrement can be suppressed.

In order to keep the fixing tape 10 fixed when the disposable diaper 1 is worn, the fixing force between the fixing tapes 10 (the fixing force between the hook sheet 12 and the target sheet 13) is set to 0.1 N/10mm or more. On the other hand, if the fixing force is too strong, it will be difficult to detach the fixing tape 10 when the disposable diaper 1 is replaced. Therefore, it is desirable to set the fixing force between the fixing belts 10 to 0.5 N/10 mm or less. Likewise, it is desirable that the fixing force between the hook sheet 12 and the target tape 14 is 0.1 N/10 mm or less and 0.5 N/10 mm or less. In addition, the target sheet 13 can be provided only on any one of the fixing belts 10 , so that material can be reduced. However, if the fixing sheet 13 is provided on the two fixing belts 10 , the user can fix the fixing belts 10 without worrying about the order of the fixing belts 10 .

Each of the fixing straps 10 in this embodiment has a substantially trapezoidal shape, and the length in the longitudinal direction of the tip portion in the width direction of the fixing strap 10 is shorter than the root portion of the fixing strap 10 . Therefore, as shown in FIG. 8 , the upper fixing belt 10 b has a non-overlapping area (hatched area) that does not overlap the lower fixing belt 10 a, and this non-overlapping area can be fixed to the target belt 14 . Furthermore, the base of the strap 10b is more susceptible to force from the legs of a low birthweight infant in the positioning position than the tip. Also, the fixing force between the fixing belt 10 and the target belt 14 may be greater than the fixing force between the fixing belts 10 . In this case, since the base (hatched area) of the upper fixing belt 10b is fixed to the target belt 14 by a strong fixing force, it becomes more difficult for the upper fixing belt 10b to come off, which can suppress leakage of excrement. On the other hand, the distal end portion of the upper fixing strap 10b is fixed to the lower fixing strap 10a with a relatively weak fixing force. Therefore, when replacing the disposable diaper 1, the user easily grasps the front-end|tip part of the fixing tape 10a on the upper side, and removes the fixing tape 10 easily.

FIG. 9 is an explanatory diagram of a method of measuring a fixing force. The fixing force (N/10 mm) between the fixing belts 10 was measured as follows using an Autograph Tester (Autograph Tester) AG-Xplus (manufactured by Shimadzu Corporation) which is an example of a tensile strength tester. First, a sample S1 obtained by cutting out a rectangular region including the hook sheet 12 from the fixing tape 10 as a measurement object was prepared. Likewise, a sample S2 obtained by cutting out a rectangular area including the target sheet 13 from the fixing tape 10 was prepared. Next, the samples S1 and S2 were overlapped correspondingly to the longitudinal direction and the width direction of the disposable diaper 1, and then the hook sheet 12 of the sample S1 was placed on the target sheet 13 of the sample S2. A 700 g roller was rolled on the samples S1 and S2 in the width direction of the disposable diaper 1 (the direction in which the fixing tape 10 was peeled off) at a speed of 5 mm/min, and the samples S1 and S2 were fixed.

Next, the samples S1 and S2 fixed to each other were placed on a tensile strength testing machine. More specifically, the sample S2 side is fixed to the inclined surface 50 a of the base 50 , and the end of the sample S1 is held by the moving member 51 . The width direction of the disposable diaper 1 is aligned with the inclination direction of the inclined surface 50a. Then, the moving member 51 was moved upward relative to the base 50 at a constant moving speed of 300 mm/min, and the samples S1 and S2 were peeled off. The load value was obtained when the angle formed between the inclined surface 50 a and the direction in which the moving member 51 pulled the sample S1 (the direction of the pulling force acting on the sample S1 ) was 135 degrees.

Finally, the obtained load value was converted into a load value in the case where the size of the sample S1 (hook sheet 12) in the length direction of the disposable diaper 1 was 10 mm; the converted load value was the aforementioned fixing force (N/10mm ). The fixing force of the hook sheet 12 and the target belt 14 can be measured in the same manner.

The above-mentioned embodiments are intended to facilitate understanding of the present invention, and the present invention is not to be construed as being limited by these embodiments. Needless to say, various modifications and improvements can be made to the present invention without departing from the gist of the present invention, and equivalents thereof fall within the present invention.

For example, the disposable diaper 1 does not necessarily include the three-dimensional gathers 20 . Moreover, in the disposable diaper 1, the standing point 24a of the three-dimensional gathers 20 may be located in the absorber 4, or may be located in the width direction outer side rather than the leg circumference elastic member 6. In addition, in the disposable diaper 1, the standing point 24a of the three-dimensional gathers 20 may be located in the leg circumference elastic member 6 side rather than the absorber 4. FIG. Furthermore, in the disposable diaper 1, the length in the width direction from the widthwise outer end 41a of the absorbent core 41 to the widthwise inner end 6a of the leg circumference elastic member 6 may be smaller than that of the leg circumference elastic member. 6 length in the width direction. In addition, in the disposable diaper 1, the fixing tape 10 does not necessarily have the fixing sheet 13.

Explanation of reference signs

1 disposable diaper, 1a front waist area, 1b crotch area, 1c rear waist area, 2 front sheet, 3 back film, 4 absorber, 41 absorber core, 42 cover material, 5 outer sheet, 6 legs Peripheral elastic member (elasticity area), 10 fixing belt (fixing member), 11 base material, 12 hook sheet, 13 target sheet, 14 target belt, 15 target display part, 20 three-dimensional pleats, 21 three-dimensional pleats Sheet material, 22 three-dimensional pleat stretchable member, 23 first joint, 24 second joint, 24a standing point of three-dimensional pleat, 30 back, 31 leg, 50 abutment, 50a inclined surface, 51 moving member, HB waist opening, HL leg opening, A overlap area.

Claims (5)

1. a kind of disposable diaper, which is used for baby of the body weight in below 3000g, and the disposable diaper has orthogonal Length direction, width and thickness direction, and the disposable diaper is to include front waist region, crotch region and low back The disposable diaper of the deploying type in region is enclosed,

The disposable diaper includes：

Absorber；

A pair of fixing component, the pair of fixing component from the rear waist region towards the width outside prolong Stretch；

Calf circumference retractility component, the calf circumference retractility component is fixed to the Attacking Midfielder respectively along by the pair of fixing component The a pair of leg circumference opening for enclosing region and being formed is arranged, and the calf circumference retractility component is configured to than the absorber by institute State the outside on width；And

Object representation portion, the object representation portion indicates the position of the pair of fixing component front waist region Put,

The absorber has overlapping region on the length direction, in the overlapping region, the absorber and institute State object representation portion to overlap on the thickness direction,

The length on the width in the object representation portion is the absorber in the overlapping region in institute State below the greatest length on width.

2. disposable diaper according to claim 1, it is characterised in that

Both sides on the width, are provided with a pair three-dimensional pleat for erecting in wearer side along the length direction Pleat, and

Described solid rivel erect a little positioned at be provided with the corresponding calf circumference retractility component elastic region in institute State the end in outside on width and the position between the end in the outside on the width of the absorber.

3. disposable diaper according to claim 2, it is characterised in that

The described of the solid rivel erects the end for being a little located at the inner side on the width than the elastic region Position by the side in the outside on the width of the absorber.

4. disposable diaper according to any one of claim 1 to 3, it is characterised in that

The absorber includes the covering material of absorber core and the absorber core, and

End from the outside on the width of the absorber core is to being provided with the corresponding calf circumference retractility structure The length on the width at the end of the inner side on the width of the elastic region of part is described flexible Property region more than the length on the width.

5. disposable diaper according to any one of claim 1 to 4, it is characterised in that

The surface of the side on the thickness direction of a fixing component in the pair of fixing component and another fixation The surface of the opposite side on the thickness direction of component can be fixed to one another with the fixing force of more than 0.1N/10mm.