TWI549664B - Disposable disposable diaper - Google Patents

Description

Disposable disposable diaper

The present invention relates to a disposable disposable diaper.

In the prior art, a disposable disposable diaper has a front waistline region, a rear waistline region, and a crotch region, and is formed with a pair of leg-opening portions, and is provided to be carried across the underarm region. The absorbent body extending toward the front waistline region and the rear waistline region is disposed so as to extend along the leg-opening portion along the leg-surrounding portion that expands and contracts in the longitudinal direction of the product. The leg-opening portion of the disposable diaper of the above-described structure is disposed along the leg circumference of the wearer (for example, refer to Patent Document 1).

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] JP-A-2001-37807

In general, when comparing the body curve of the wearer of the buttocks on the front side of the lower part of the lower part of the lower part and the lower part of the lower part of the lower part of the crotch, The buttocks are in an inflated state, and when the wearer moves the foot, the expansion and contraction of the skin caused by the movement on the buttock side becomes larger than the expansion and contraction of the skin caused by the movement on the abdomen side. Therefore, even in the case where the disposable disposable diaper is worn along the wearer's leg circumference, there is a possibility that the back waist region cannot be placed on the buttocks in a sufficient area. When the wearing state is used, the rear waist region is likely to be in a protruding state, and the disposable disposable diaper can not follow the movement of the foot, which may cause displacement of the disposable disposable diaper, or after use. The disposable diaper causes an obstacle to the movement of the foot or a gap between the foot and the disposable disposable diaper to cause an external leak.

In order to solve the above problem, it is necessary to improve the adhesion of the disposable diaper to the foot after use, and the disposable diaper can follow the action of the foot after use. However, when the adhesion to the wearer's foot is excessively increased, the irritation to the skin becomes strong, and there is a problem of skin problems such as redness or rough skin.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a disposable disposable diaper that can not only suppress irritation to the skin but also follow the action of the wearer's foot.

The disposable disposable diaper (the disposable disposable diaper 10) disclosed in the present invention has a front waistline region (front waistline region 20), a rear waistline region (rear waist region 30), and the aforementioned a crotch region (the crotch region 25) between the front waistline region and the rear waistline region, and a product longitudinal direction (product longitudinal direction L) from the front waistline region toward the rear waistline region, and a longitudinal direction of the product Straight product width direction Further, the product width direction W) further includes an absorber (absorbent body 40) that is stretched across the crotch region and extends from the crotch region toward at least one of the front waist region and the rear waist region; and the leg stretch The leg portion (leg stretch portion 75) is disposed so as to be expandable and contractible along the longitudinal direction of the product along the leg-opening portion provided on the outer side in the product width direction of the absorbent body. The leg-opening portion and the leg-retracting portion extend outward in the product width direction from the crotch region toward the outer side in the product longitudinal direction, and the absorbent body and the leg portion are stretched and contracted in the product width direction. An auxiliary expansion-contraction portion (auxiliary expansion-contraction portion 76) capable of contracting along the longitudinal direction of the product is provided between the portions, and the auxiliary expansion-contraction portion is disposed to be biased from the center in the longitudinal direction of the product toward the rear waistline region side, and the auxiliary The elongation of the stretchable portion in the longitudinal direction of the product is higher than the elongation of the leg stretchable portion in the longitudinal direction of the product.

10‧‧‧Disposable disposable diapers

20‧‧‧ Front waist area

25‧‧‧胯下区域区

30‧‧‧After waist area

35‧‧‧ leg opening

40‧‧‧ absorber

40a‧‧‧Absorbable chip

40b‧‧‧chip cladding material

50‧‧‧Skin sheet

60‧‧‧Outer sheets

60a‧‧‧back sheet

70‧‧‧Flanking

71‧‧‧Flexible components

75‧‧‧ Leg flexion

75F‧‧‧End of the front waistline side of the leg extension

75I‧‧‧The inner end region in the width direction of the leg extension

75R‧‧‧End of the rear waistline area of the leg extension

76‧‧‧Auxiliary expansion department

76F‧‧‧End of the front waistline side of the auxiliary telescopic part

76R‧‧‧End of the rear waistline side of the auxiliary telescopic part

80‧‧‧ leg side pleats

81‧‧‧ joint part

81A‧‧‧1st joint

81B‧‧‧2nd joint

82‧‧‧Free end section

84‧‧‧Contraction

85‧‧‧Waist expansion and contraction

90‧‧‧ buckle

90F‧‧‧End of the front waistline side of the buckle

95‧‧‧ Target

End of the rear waistline area of the target of the 95R‧‧‧ target

115‧‧‧ gap

125‧‧‧ gap

200‧‧‧ Pants Department

200a‧‧‧ Pants expansion joint

End of the front waistline area of the 200aF‧‧‧ crotch expansion joint

End of the rear waistline area of the 200aR‧‧‧ crotch expansion joint

L‧‧‧Product length direction

W‧‧‧Product width direction

Fig. 1 is a developed plan view of the disposable disposable diaper of the present embodiment.

Fig. 2 is a developed plan view of the disposable disposable diaper of the present embodiment.

Fig. 3 is a cross-sectional view of the disposable disposable diaper taken along the line F1-F1 shown in Fig. 1.

Fig. 4 is a view showing a state in which the disposable disposable diaper of the present embodiment is worn on the wearer.

Next, an embodiment of the disposable disposable diaper according to the present invention will be described with reference to the drawings. In the description of the following drawings, the same or similar symbols are attached to the same or similar parts. However, it should be noted that the drawings are only schematic diagrams, and the ratios of the dimensions are not the same as the actual products.

Therefore, the specific dimensions and the like need to be judged by considering the following description. In addition, the drawings also include portions having different dimensional relationships or ratios from each other.

(1) The overall schematic structure of disposable disposable diapers

Figs. 1 and 2 are plan views showing the disposable disposable diaper 10 of the present embodiment. Fig. 3 is a cross-sectional view of the disposable disposable diaper 10 taken along the line F1-F1 shown in Fig. 1. Further, in the expanded plan view shown in Fig. 1, the leg stretch portion 75 and the leg side gather portion 80 are extended to the surface sheet 50 or the side flap portion 70 of the disposable disposable diaper 10, and the like is not formed with wrinkles. The pattern of the state of the fold. However, for convenience of explanation, the leg side pleat portion 80 is illustrated in a telescopic state.

The disposable 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 that comes into contact with the wearer's front waistline (abdomen portion). Further, the rear waistline region 30 is a portion that comes into contact with the wearer's rear waistline portion (back portion). The crotch region 25 is tethered between the front waistline region 20 and the rear waistline region 30. Moreover, the disposable disposable diaper 10 is formed with a pair of leg openings 35. The leg-opening portion 35 is provided at the side end portion of the disposable diaper in the product width direction of the disposable diaper, and is disposed to be worn along the wearable disposable diaper in a wearer state. The part of the leg circumference.

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

The disposable disposable diaper 10 is placed across the crotch region 25 and includes an absorbent body 40 that extends from at least one of the front waist region 20 and the rear waist region 30 from the crotch region. The absorber 40 is composed of an absorbent chip 40a and a chip covering member 40b.

The absorbent chip 40a is formed in the same manner as a conventional disposable disposable diaper, and can be suitably formed using publicly known members or materials such as pulverized pulp or superabsorbent polymer. The absorptive chip 40a is covered by the sheet-like chip covering material 40b. The chip cladding material 40b is a sheet for covering the absorbent chip 40a. At least one portion of the chip covering member 40b on the skin surface side is formed of various fiber nonwoven fabrics or thin paper sheets having liquid permeability. For example, it is possible to use a hot-air mass in the nonwoven are about 10 ~ 30g / m ^2, spunbond nonwoven fabric, SMS (Spunbond-Meltblown-Spunbond ) non-woven fabric, or a mass of about 10 ~ 30g / m ² sheet of tissue.

The surface side of the absorber 40 (contacts the skin surface side) is provided with a liquid permeable surface sheet 50. Further, the back surface side (not in contact with the skin surface side) of the absorbent body 40 is provided with a liquid-impermeable back sheet 60a.

The side edge portion of the absorbent body 40 in the product width direction W, Do not have the wing portion 70. The side flap portion 70 is composed of one piece or a non-woven fabric in which a plurality of sheets of two or more sheets are stacked. Further, each of the pair of side wing portions 70 is provided with a buckle 90.

The buckle 90 extends on the rear waistline region 30 along the width direction W of the product, and the disposable disposable diaper 10 is held by the non-contacting skin side of the front waistline region 20. The user's body.

In the present embodiment, the waistline holding portion is constituted by the front waistline region 20, the back waistline region 30, and the buckle belt 90. The waistline holding portion of the back waistline region 30 is a range extending from the region where the engaging member of the buckle 90 is provided in the width direction. The waistline holding portion of the front waistline region 20 is a range extending from the region where the target portion 95 is provided in the width direction.

Further, the disposable disposable diaper 10 is provided with a crotch elasticized portion 200a formed in the crotch region 25 and stretchable in the longitudinal direction L of the product. Specifically, the crotch expansion-contraction portion 200a is disposed in the crotch portion 200 formed in the crotch region 25. Further, the structure of the crotch portion 200 and the crotch elastic portion 200a will be described in detail below.

The surface side (the surface sheet 50 side) of the absorber 40 is provided with a pair of leg expansion-contraction parts 75, and is formed in the periphery of the leg-opening part 35, and can expand and expand in the longitudinal direction L of a product.

The leg stretch portion 75 is longer than the crotch stretch portion 200a in the product longitudinal direction L, and is positioned outside the crotch stretch portion 200a in the product width direction W. In addition, it is located on the inner side in the width direction of the leg stretchable portion 75 and on the outer side in the width direction of the absorber 40, The auxiliary expansion and contraction portion 76 that is contracted in the longitudinal direction of the product. The structure of the crotch portion 75 and the auxiliary elastic portion 76 will be described in detail below.

Further, a pair of leg side pleat portions 80 extending in the longitudinal direction L of the product are provided inside the pair of leg stretchable portions 75 (near the center in the product width direction W). The leg side pleat portion 80 is provided at an inner end portion of the side flap portion 70 in the product width direction, and is disposed at an upright stretch pleat portion on the inner side in the product width direction from the leg stretch portion. The leg side pleat portion 80 is disposed on the inner side in the product width direction from the leg stretch portion 75, and functions as a leg side stretch portion.

The side flap portion 70 is folded in a double layer at the inner end portion in the product width direction to be folded back toward the surface sheet side. The elastic member 71 is provided between the double-side wing portions 70 in a state of being elongated in the longitudinal direction (see FIG. 3). The leg side pleat portion 80 is formed by the side wing portion 70 and the elastic member 71.

The expanded plan view of the disposable disposable diaper shown in Fig. 1 shows that the elastic member 71 of the leg side pleat portion 80 is in a contracted state, and the unfolded disposable diaper shown in Fig. 2 is unfolded. In plan view, the elastic member 71 showing the leg side pleat portion 80 is in an extended state.

The leg side pleat portion 80 has an engaging portion 81 joined to the surface sheet 50 or the back sheet 60a, and a free end portion 82 in which an elastic member is disposed. The free end portion 82 includes a central portion in the longitudinal direction of the crotch region 25, and is contracted toward the longitudinal direction of the product by the elastic member 71 to constitute a constricted portion 84. The leg side pleat portion 80 is erected when the wearing portion 81 is used as the base end portion, and the free end portion 82 is to be erected. The constricted portion 84 serves as a apex portion to come into contact with the wearer's skin. That is, the joint portion is formed as a base end portion of the leg-side expansion-contraction portion.

In addition, the constricted portion 84 is a portion that substantially contracts toward the longitudinal direction of the product by the elastic member 71, and refers to a portion other than the elastic member 71 disposed in a state where the contraction force is not exerted. Further, Fig. 2 shows that the joint portion 81 to which the side flap portion 70 and the surface sheet 50 (or the back sheet 60a or the like) are joined is attached to the leg portion side pleat portion.

The joint portion 81 is provided in plurality, the first joint portion 81A is disposed on the outer side in the longitudinal direction of the product than the contraction portion 84, and the second joint portion 81B is disposed on the outer side in the product width direction from the contraction portion 84. Therefore, the leg side pleat portion 80 is configured such that the central portion in the longitudinal direction of the product including the crotch region 25 rises toward the wearer side.

In the joint portion 81 of the leg side pleat portion 80, the second joint portion 81B that is disposed on the outer side in the product width direction from the contraction portion 84 is disposed in the crotch expansion-contraction portion 200a and the leg portion in the product width direction W. Between the 75th. The second joining portion 81B is joined to the back sheet 60a (and a part of the outer sheet 60) in the longitudinal direction of the product. Further, the back sheet 60a is disposed between the absorber 40 and the exterior sheet 60 and functions as a leakage preventing sheet.

In the joint portion 81 of the leg side pleat portion 80, the first joint portion 81A disposed outside the contract portion 84 in the longitudinal direction of the product is joined to the surface sheet 50.

Further, the joint portion 81 of the leg side pleat portion 80 can adopt various configurations. The joint portion, for example, is configured as a base end for standing, The portion extending from the crotch portion toward the front waist region and the rear waist region and joined to the surface sheet may be formed in the longitudinal direction of the product, or may be formed on the outer side in the width direction of the absorbent chip 40a and the liquid impervious back sheet or outer surface. The portion where the sheet is joined may also be used.

Further, the leg-side pleat portion may be an upright pleat portion disposed on the inner side in the product width direction of the leg stretch portion, and is not limited to the above-described structure. Of course, a well-known leg may be employed in the prior art. The structure of the side pleats.

Further, a waist elastic-contracting portion 85 that can expand and contract in the product width direction is provided between the pair of fastening tapes in the product width direction. The waist elastic-contracting portion 85 is disposed between a pair of fastening tapes in a plan view and shrinks the buckles in the width direction. The waist elastic-contraction portion 85 is disposed on the surface of the surface sheet that abuts on the skin surface side, and contracts the buckles in the width direction.

In the present embodiment, the waist elastic-contraction portion 85 is configured by a stretchable sheet. Although the member constituting the waist elastic-contraction portion 85 is not particularly limited, it is preferable to use a member which is as thin as possible and has low bending rigidity and a small neck-in ratio.

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

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

In the present embodiment, the waist elastic-contraction portion 85 is disposed on the outer casing thin Between the sheet 60 and the back sheet 60a. However, when the chip covering member 40b is configured to protrude outward in the longitudinal direction of the product than the absorbent chip 40a, the waist stretchable portion 85 may be disposed between the chip covering member 40b and the back sheet 60a or the exterior sheet 60. Although the position of the waist elasticized portion is not particularly limited, it is preferably disposed so as not to abut against the skin surface side of the absorbent body 40. Further, the region where the absorber is not disposed may be disposed between the side flap portion 70 and the back sheet 60a or the exterior sheet 60.

Further, the waist elastic-contraction portion of the present embodiment is configured to expand and contract in the product width direction. However, the waist elastic-contraction portion may be configured to expand and contract in the product width direction and the product longitudinal direction.

(2) Leg expansion and contraction and auxiliary expansion and contraction

Next, the leg expansion and contraction portion 75 and the auxiliary expansion and contraction portion 76 will be described in detail. The leg stretchable portion 75 is disposed so as to be expandable and contractible in the longitudinal direction L of the product along the leg-opening portion 35 provided on the outer side in the product width direction of the absorbent body 40. The leg-surrounding opening portion 35 and the leg-retracting portion 75 have a width direction inner end region 75I located at the innermost side of the crotch region, and gradually extend toward the outer side in the longitudinal direction of the product from the crotch region 25, and It extends toward the width of the product. Further, the inner end region 75I in the width direction of the leg stretchable portion 75 may be arranged to be continuous in the longitudinal direction of the product or discontinuous in the longitudinal direction of the product.

The waist elasticized portion 75 of the present embodiment is configured by a stretchable sheet. For example, a stretchable film in which a thermoplastic elastomer such as urethane or styrene is melted into a film shape, or The stretchable nonwoven fabric formed of the stretchable fiber, or the stretchable film or the stretchable nonwoven fabric is partially cut or the non-stretchable sheet is embrittled, and the composite sheet is bonded together as the stretchability. Sheet.

Further, instead of the stretchable sheet, a leg-shaped stretchable portion 75 may be formed by arranging one or a plurality of filament-like or belt-shaped elastic members formed of urethane elastic fibers or natural rubber.

The leg stretch portion 75 is disposed between the side wing portion 70 and the exterior sheet 60. Alternatively, the leg stretchable portion 75 is disposed between the back sheet 60a and the side flap portion 70 in a region including the back sheet 60a disposed between the absorber 40 and the exterior sheet 60.

The stretchable sheet constituting the leg stretchable portion 75 has a width of 5 mm or more (in the product width direction W of the disposable disposable diaper 10 in the natural state) of at least 45 mm or less, more preferably at least in the crotch region 25, more preferably 12.5mm or more and 35mm or less. When the thickness is less than 5 mm, the surface of the wearer's leg is substantially unevenly concentrated, so that the effect of reducing the load on the skin by the elastic member cannot be caused. At 45 mm, the area along the leg circumference becomes too wide compared to the length of the product in the width direction of the disposable disposable diaper, which causes the stretchable sheet to wrap around the wearer's body side, or become It is easy to eversion.

The elongation of the leg stretch portion 75 is preferably 1.5 to 2.2 times. In the present embodiment, the elongation of the leg stretchable portion 75 is set to be 1.8 to 2.0 times. Further, the elongation means the degree of elongation of the leg stretch portion or the auxiliary stretch portion, as specified below.

Elongation = (length of the leg stretch portion in the extended state) ÷ (the length of the leg stretch portion in the natural state), or elongation = (the length of the auxiliary stretch portion in the extended state) ÷ (the auxiliary stretch portion of the natural state) length)

Further, in the present specification, the above elongation is measured, for example, in the following manner.

In the first step, when the disposable disposable diaper 10 is sealed in a package or the like, the disposable disposable diaper 10 is taken out from the package. Next, the arrangement area of the leg stretch unit is cut out. In this case, the non-stretch sheet joined to the leg stretch portion is also cut out. Further, the arrangement area of the auxiliary expansion and contraction portion is cut out. At this time, the auxiliary stretchable portion is cut along the auxiliary stretchable portion at a position 0.5 to 1.0 mm outside the product width direction of the auxiliary stretchable portion. The elongation of the sample of the leg stretched portion after the cut was measured, and the elongation of the leg stretched portion was measured. Further, the elongation of the sample of the auxiliary stretchable portion after the cutting was measured, and the elongation of the auxiliary stretchable portion was measured. The "length" in the present specification is measured by a tape measure manufactured by Shinwa Rules Co., Ltd. (foot: coated with glass fiber-containing PVC).

Each sample was placed in an environment of 20 ° C ± 2 ° C and a relative humidity of 60 % ± 5% RH for 60 minutes, and then the length of the leg stretch portion and the auxiliary stretch portion was measured along the expansion and contraction direction. This length is referred to as "the length of the leg stretch portion in the natural state" and "the length of the auxiliary stretch portion in the natural state".

In the second step, the length of the stretched direction of the desired region in this state (that is, the natural state) and the fact that the wrinkles are extended from the natural state by the elastic member to the non-stretchable sheet cannot be visually confirmed. The length of the stretched direction of the desired area in the state of wrinkles. This length is referred to as "the length of the leg stretch portion in the extended state" and "the length of the auxiliary stretch portion in the extended state".

The above measurement results were used, and the elongation was measured by calculation by the above formula.

Further, the interval between the inner ends of the pair of left and right leg stretchable portions 75 in the product width direction W gradually increases from the crotch region 25 toward the front waistline region 20, and along with the underarm region 25 The width is gradually widened toward the rear waist region 30. When the disposable diaper is worn to the wearer's body, the leg stretchable portion can be arranged to have a narrower shape at the lower portion of the crotch and a shape that is gradually widened toward the front and rear waist portions, so that the leg stretch portion can be more smoothly along the body. The curve and the leg extensions are configured to be suitable for the wearer's leg circumference.

Further, the interval (D1 in the drawing) on the end portion of the front waistline region 20 of the pair of left and right leg stretchable portions 75 is the end of the rear waistline region 30 of the pair of left and right leg stretchable portions 75. This interval on the part (D2 in the figure) is narrower. In addition, in the product longitudinal direction L and the product width direction W, the disposable disposable diaper 10 is expanded from a natural state to a state in which it is not wrinkled, and is held, and then a pair of left and right leg stretchable portions are measured. The distance between the inner ends of the product in the width direction W of 75.

The stretch of the skin surface of the wearer's body, on the hips It is not too large and is more prominent near the outer side in the width direction. Further, the leg stretch portion 75 is in close contact with the wearer's body. Therefore, by setting D2>D1, even if the wearer's motion is applied to the disposable disposable diaper 10, the leg stretchable portion 75 on the buttocks side can be extended and held even if stretched. A large amount of change does not cause the leg stretch portion 75 to protrude. Therefore, it is possible to suppress the occurrence of deviation of the disposable disposable diaper 10 due to the leg stretch portion 75.

The auxiliary stretchable portion 76 is disposed between the absorber 40 and the leg stretch portion 75 in the product width direction, and is configured to be contractible in the longitudinal direction of the product. The auxiliary stretchable portion 76 is not disposed along the leg-opening portion 35 in a curved shape, but is arranged linearly along the longitudinal direction of the product.

The auxiliary expansion/contraction portion 76 is configured by a filament-shaped elastic member. For example, an elastic member having a thickness of 340 to 940 dtex can be used. Further, the elongation of the auxiliary stretchable portion 76 is configured to be higher than the elongation of the leg stretch portion 75. Specifically, the elongation of the auxiliary stretchable portion 76 is preferably 1.8 to 2.5 times the optimum. In the present embodiment, the elongation of the auxiliary stretchable portion 76 is set to 2.1 times.

The leg stretch portion 76 is disposed between the back sheet 60a and the side flap portion 70. Further, depending on the length of the back sheet 60a in the product width direction, it may be disposed between the side flap portion 70 and the exterior sheet 60.

The auxiliary expansion/contraction portion 76 is disposed to be biased toward the rear waistline region from the center in the longitudinal direction of the product. The area in which the auxiliary expansion/contraction portion 76 expands and contracts is wider in the rear waistline region than in the front waistline region.

Furthermore, the leg expansion and contraction portion 75 and the auxiliary expansion and contraction portion 76 are borrowed. A portion that is substantially contracted toward the longitudinal direction of the product by a stretchable sheet or a filament-shaped elastic member, and refers to a portion other than the stretchable sheet disposed in a state where the contraction force is not exerted.

Fig. 4 is a schematic view showing a state in which the disposable disposable diaper of the embodiment is worn, and is viewed from the rear of the wearer. As shown in Fig. 4, the leg-opening portion 35 of the disposable disposable diaper is disposed along the leg circumference by the leg expansion-contraction portion 75, and is further inward in the width direction than the leg-opening portion. The auxiliary stretchable portion 76 is contracted toward the longitudinal direction of the product.

By arranging the auxiliary elastic-contraction portion 76 which is biased toward the rear waistline region side, the disposable disposable diaper can be used closer to the vicinity of the buttocks than the abdominal side. The contraction area formed by the auxiliary expansion-contraction part 76 is provided in the position which contact|connects the side parts of the buttocks which the amount of expansion of the skin surface is large by the operation of a wearer, and the disposable diaper can follow the skin of the buttocks after use. action.

In addition, the interval between the two legs of the wearer is formed into a shape in which the underarm region is the narrowest and gradually widens from the crotch region toward the abdomen side or the back side. Since the leg-opening portion and the leg-retracting portion 75 have a shape that extends outward in the width direction from the crotch region toward the outside in the longitudinal direction, the leg-opening portion and the leg-contracting portion can be disposed along the leg hole of the wearer. 75, and since local stress can be suppressed, it is possible to reduce the burden on the skin by adhering to the wearer at a lower elongation.

Furthermore, by overlapping the auxiliary expansion and contraction portion 76 and the leg expansion and contraction portion 75, the diaper is brought close to the buttocks due to the auxiliary expansion and contraction portion 76. The leg side opening portion can be disposed along the leg circumference by the leg stretch portion 75, and not only the elongation of the leg stretch portion 75 but also the disposable disposable diaper can be configured to follow the buttocks. Actions. Therefore, compared with the structure in which the elongation of the expansion-contraction portion 75 is increased, the diaper is brought into close contact with the leg-opening portion, the elongation of the leg-contraction portion 75 can be reduced, and the occurrence of skin problems can be suppressed.

Further, the leg stretchable portion 75 is disposed along the leg circumference of the wearer, and the movement of the leg portion is transmitted to the disposable disposable diaper by the leg stretch portion 75, and the displacement of the absorbent body 40 is caused. Possible. However, the elongation of the auxiliary stretchable portion 76 disposed close to the absorbent body is made higher in the width direction of the product, and the elongation of the leg stretchable portion 75 disposed outside the width direction is made lower. The auxiliary expansion-contraction portion 76 can be more and more stretched and contracted, and the influence of the movement of the leg portion can be alleviated to be transmitted to the absorber, and displacement of the absorber can be suppressed.

Further, the auxiliary stretchable portion 76 is disposed apart from the leg stretchable portion 75 in a plan view from the plane in which the disposable disposable diaper is stretched. Since the auxiliary stretchable portion 76 and the leg stretchable portion 75 are separated, the auxiliary stretchable portion 76 and the leg stretchable portion 75 do not interfere with each other and contract independently.

For example, when the auxiliary stretchable portion 76 and the leg stretchable portion 75 are disposed to overlap each other, when the disposable disposable diaper is worn, the auxiliary stretchable portion 76 is contracted, and the disposable stretchable portion 76 may be shrunk. After the disposable paper diaper. However, since the auxiliary expansion portion 76 and the leg portion are stretched Since the parts 75 are in a separated state, they can be independently functioned. Therefore, the leg-opening portion can be attached to the wearer's leg circumference by the leg stretchable portion 75, and the disposable diaper can be biased toward the buttocks by the auxiliary stretchable portion 76.

The end portion 76F on the front waistline region side of the auxiliary stretchable portion 76 is disposed on the rear waistline region side from the width direction inner end region 75I of the leg stretch portion 75. The crotch region is a portion that faces the wearer's strand, and the width direction inner end region 75I of the leg stretch portion 75 is formed as a region in the longitudinal direction center of the crotch region. When the inner end region 75I in the width direction of the leg stretch portion 75 is contracted toward the longitudinal direction of the product by the auxiliary stretch portion 76, the disposable disposable diaper will be close to the underarm region 25, and will become apparently not close. Rear waist area. However, by arranging the auxiliary stretchable portion 76 rearward of the inner end region 75I in the width direction of the leg stretch portion 75, the disposable disposable diaper can be more easily brought closer to the rear waistline region.

The outer end portion of the auxiliary stretchable portion 76 in the longitudinal direction of the product is disposed on the inner side in the longitudinal direction of the product from the waistline holding portion. Specifically, the end portion 76F on the front waistline region side of the auxiliary stretchable portion 76 is disposed on the rear waistline region side from the end portion 95R on the rear waistline region side of the target portion 95, and the rear waistline region of the auxiliary stretchable portion 76. The end portion 76R is disposed on the front waistline region side of the end portion 90F on the front waistline region side of the buckle belt 90.

The waistline holding portion is for holding the portion of the disposable disposable diaper along the waist of the wearer and is disposed along the width direction. another On the other hand, the auxiliary stretchable portion 76 is configured to contract in the longitudinal direction of the product. Therefore, for example, when the auxiliary stretchable portion 76 is disposed to overlap the waistline holding portion, the waistline holding portion may be displaced toward the inner side in the longitudinal direction by the auxiliary stretch portion 76. However, since the outer end portion of the auxiliary stretchable portion 76 in the longitudinal direction of the product is disposed on the inner side in the longitudinal direction of the product from the waistline holding portion, it can be disposed along the waistline portion of the wearer without mitigating interference with each other. Waist retaining section.

Further, the outer end portion of the auxiliary stretchable portion 76 in the longitudinal direction of the product is disposed on the inner side in the longitudinal direction of the product from the outer end portion of the leg stretchable portion 75 in the longitudinal direction of the product. Specifically, the end portion 76F on the front waistline region side of the auxiliary stretchable portion 76 is disposed on the rear waistline region side from the end portion 75F on the front waistline region side of the leg stretch portion 75, and the rear of the auxiliary stretchable portion 76 is provided. The end portion 76R of the waist region is disposed on the side of the front waistline region from the end portion 75R on the rear waistline region side of the leg stretch portion 75.

The leg stretchable portion 75 is configured such that the disposable diaper is bent and contracted after being used along the wearer's leg circumference. The end portion of the leg stretch portion 75 in the product longitudinal direction is disposed to be gradually widened in the width direction, and is disposed in the vicinity of the waistline holding portion. Therefore, the end portion of the leg stretch portion 75 in the longitudinal direction of the product functions to contract in the width direction together with the waist holding portion.

For example, when the product longitudinal direction end portion of the auxiliary stretchable portion 76 protrudes outward in the product longitudinal direction from the product longitudinal direction end portion of the leg stretch portion 75, the waistline holding portion or the leg stretch portion 75 is assisted by the stretchable portion 76. The inner side of the product is stretched in the longitudinal direction, and the waist-retaining portion or the leg-retracting portion 75 is displaced. However, due to the auxiliary expansion portion 76 The outer end portion in the longitudinal direction of the product is positioned further inward in the longitudinal direction of the product than the end portion in the longitudinal direction of the leg stretchable portion 75. Therefore, it is possible to prevent the waist holding portion or the leg stretch portion 75 from being displaced in the longitudinal direction of the product.

In addition, the auxiliary expansion/contraction portion 76 is disposed on the outer side in the product width direction from the second joint portion 81B of the leg side side pleat portion. The leg side pleat portion is a base point of the second joint portion 81B, and the contraction portion 84 that is wider inward in the width direction than the second joint portion 81B is configured to stand toward the wearer side.

For example, when the auxiliary expansion-contraction portion 76 is disposed on the inner side in the width direction of the second joint portion 81B, the inner side of the second joint portion 81B in the width direction is raised by the auxiliary stretch portion 76, and the contraction portion 84 is oriented. It is possible to stand up on the outside in the width direction. When the constricted portion 84 stands up toward the outer side in the width direction, there is a possibility that the body fluid leaks outward in the width direction. However, by arranging the auxiliary expansion-contraction portion 76 on the outer side in the width direction of the second joint portion 81B, the contraction portion 84 is easily erected toward the wearer side.

The outer end portion of the auxiliary stretchable portion 76 in the longitudinal direction of the product is disposed on the inner side in the longitudinal direction of the product from the end portion in the longitudinal direction of the product of the contraction portion of the leg-side gather portion. For example, when the auxiliary stretchable portion 76 protrudes outward in the longitudinal direction of the product from the contracted portion of the leg side pleat portion, the contraction range of the contracted portion 84 becomes shorter, and the leg side crease portion and the body are easily formed. A gap is created.

(3) The shape of the crotch

Next, the shape of the crotch portion 200 will be described. As described above, the crotch portion 200 has the crotch expansion-contraction portion 200a. The crotch elasticized portion 200a is configured to maintain a part of the crotch region in a shape flatter than other portions of the absorbent body 40 when the disposable diaper is worn. The crotch portion 200 has at least a crotch elasticized portion 200a that can be expanded and contracted in the product longitudinal direction L or the product width direction W.

The crotch expansion-contraction portion 200a is provided separately from the leg expansion-contraction portion 75 and overlaps the absorbent chip 40a (this embodiment refers to the chip cover material 40b and the back surface for covering the absorbent chip 40a). The position between the sheets 60a is configured to shrink the length of the absorbent chip 40a at the overlapping position in the width direction to 60% or more. As described above, the portion in which the absorbent chip 40a is disposed is contracted by the crotch expansion-contraction portion 200a, and the absorbent chip 40a shrinks and becomes more easily maintained in a flat shape than the portion where the absorbent chip 40a does not shrink.

On the other hand, since the front waistline region located on the outer side in the longitudinal direction of the crotch expansion-contraction portion 200a or the absorbent core piece 40a located in the rear waistline region is not shrunk by the crotch elastic-contraction portion 200a, The crotch portion 200 for maintaining the crotch portion of the disposable disposable diaper in a flat shape is not excessively adhered to the body while being fastened to the waist and waist of the wearer, and the result is that the crotch The section 200 will be properly configured along the body.

Further, since the crotch portion 200 can be expanded and contracted along the longitudinal direction L of the product, the front waistline region 20 and the rear waistline region 30 are easily erected by the contraction of the crotch portion 200, and are worn when worn. The person's thighs form a flat underarm area along the body. Since the front waistline region and the rear waistline region stand up from the crotch expansion-contraction portion 200a, the wearability of the disposable disposable diaper 10 to the wearer is improved.

In addition, the end portion 76F on the front waistline region side of the auxiliary stretchable portion 76 is closer to the rear waistline region than the end portion 200aF on the front waistline region side of the crotch stretchable portion, and is disposed on the side of the back waistline region of the crotch expansion-contraction portion. The end portion 200aR is further on the side of the front waistline region. In a state in which the crotch region is positioned to face the wearer's strand by the crotch expansion-contraction portion 200a, the contraction region that is contracted by the auxiliary stretch portion 76 can be placed on the wearer's buttocks.

The crotch elasticized portion 200a is preferably constituted by a stretchable sheet. By forming the crotch stretchable portion 200a by the stretchable sheet, the absorbent chip 40a in the region in which the stretchable sheet is disposed can be similarly shrunk, and the flat shape can be more easily maintained. Further, the stretchable sheet can be configured, for example, by the same stretchable sheet as the leg stretchable portion 75.

Further, instead of the stretchable sheet, a plurality of filament-like or belt-shaped elastic members formed of polyurethane elastic fibers or natural rubber may be disposed in the crotch stretchable portion 200a. In this case, in order to shrink the absorbent chip 40a in the same manner by the crotch stretchable portion 200a, the interval between the elastic members is set to 7 mm or less, and more preferably 5 mm or less. Further, in order to shrink the absorbent chip 40a in the same manner, the difference in the interval between the adjacent elastic members is preferably 2 mm or less.

Further, the elongation of the crotch stretchable portion 200a is specifically set to 1.2 times or more and 1.8 times or less. In the present embodiment, the elongation of the crotch expansion-contraction portion 200a is set to 1.4 times. The elongation is the degree of elongation in the direction of expansion and contraction (the longitudinal direction L of the product) of the crotch expansion-contraction portion 200a, as specified below.

The elongation is the degree of elongation of the crotch stretchable portion 200a in the stretching direction (the longitudinal direction L of the product in the present embodiment) as specified below.

Elongation = (length in the expansion and contraction direction of the crotch expansion-contraction portion 200a in the maximum stretch state) / (length in the expansion and contraction direction of the crotch elastic-contraction portion 200a in the natural state)

Further, in the present specification, the above elongation is measured, for example, in the following manner.

In the first step, when the disposable disposable diaper 10 is sealed in a package or the like, the disposable disposable diaper 10 is taken out from the package, and placed at 20 ° C ± 2 ° C in this state, and After 60 minutes in an environment having a relative humidity of 60% ± 5% RH, the length of the crotch expansion-contraction portion was measured along the expansion and contraction direction. This length is set to "the length in the expansion and contraction direction of the crotch expansion-contraction portion 200a in the natural state".

In the second step, the length of the stretched direction of the desired region in this state (that is, the natural state) and the state in which the wrinkles are extended from the natural state by the elastic member so that the wrinkles are not visually confirmed are measured. Required area The length of the field's telescopic direction. This length is set to "the length in the expansion and contraction direction of the crotch expansion-contraction portion 200a in the maximum extension state".

The above measurement results were used, and the elongation was measured by calculation using the above formula.

As described above, by setting the elongation of the crotch expansion-contraction portion 200a to 1.2 times or more, 1.8 times or less can appropriately follow the stretching of the wearer's skin.

For example, when the wearer takes a posture in which the front side of the body is contracted, the skin on the buttock side of the wearer has a portion extending by about 30% with respect to the state in which the body is stretched.

In other words, when the expansion ratio of the crotch expansion-contraction portion 200a is 1.2 or less, the crotch stretchable portion 200a in the natural state cannot be sufficiently shrunk, and the disposable paper is used as compared with the case where the crotch expansion-contraction portion 200a is not provided. The contraction of the absorbent body region on the thigh portion of the diaper 10 is small, and on the wearer's thigh portion, a flat shape cannot be sufficiently formed along the body.

On the other hand, when the elongation of the crotch expansion-contraction portion 200a is set to be larger than 1.8 times, the contraction size in the contraction direction of the crotch expansion-contraction portion 200a becomes excessively large, so that the region having the crotch expansion-contraction portion 200a is likely to become The disposable disposable diaper 10 is liable to be deviated below the wearer rather than the state of being more accommodating along the body system.

Further, the amount of contraction of the crotch stretchable portion 200a in the longitudinal direction L of the product may be 2 to 8% of the length of the disposable diaper 10 in the longitudinal direction L of the product.

In addition, the amount of shrinkage refers to a length "b (mm)" in a state in which the wrinkles are extremely small and the surface of the sample is nearly smooth, and a length "a (mm) in a natural state along the direction of expansion and contraction of the sample. The difference between the two can be calculated by (ba).

The inventors have confirmed that when the amount of shrinkage in the product longitudinal direction L of the crotch stretchable portion 200a is set to 2 to 8% of the length of the product longitudinal direction L of the discarded disposable diaper 10, it is discarded after use. During the wearing of the disposable diaper 10 to the wearer, the crotch expansion-contraction portion 200a can be easily passed along the wearer's body.

Here, when the contraction amount of the crotch stretched portion 200a in the product longitudinal direction L is set to be larger than 8%, the crotch stretchable portion 200a is excessively shrunk, and the product longitudinal direction L of the disposable disposable diaper 10 is used. The length may be insufficient, so that the disposable disposable diaper 10 becomes difficult to wrap around the wearer's body, and in the underarm region 25, the disposable disposable diaper 10 and the wearer's body may be excessively Close contact makes it easy to cause deviation.

On the other hand, when the contraction amount of the crotch expansion-contraction part 200a in the longitudinal direction L of the product is set to 2% or less, it becomes difficult to show that the crotch-type elastic diaper 10 can be used close to the wearer's body after the crotch-expandable portion 200a can be used. effect.

Further, the center of the crotch stretchable portion 200a in the longitudinal direction L of the product is disposed on the side of the front waistline region 20 at the center of the disposable disposable diaper 10 in the longitudinal direction L of the product. Further, the crotch expansion-contraction portion 200a is disposed so as to straddle the center of the disposable disposable diaper 10 in the longitudinal direction L of the product.

In this case, the rigidity of the absorbent chip 40a and the rigidity of the other components of the disposable disposable diaper 10 are considered, and although the thickness of the elastic member to be used or the pitch of the arrangement can be appropriately selected, When the main body of the disposable disposable diaper 10 is in a natural state (non-stretched state), it is preferable that all of the side edge portions of the absorbent chip 40a in the product width direction W are in a contracted 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 refer to a region where the absorptive chip 40a for constituting the absorber 40 is not formed. In the present embodiment, the notch 115 and the notch 125 refer to a low-rigidity portion in which the basis weight of the absorptive chip 40a is lower than other portions of the absorptive chip 40a. Further, instead of forming the notch 115 and the notch 125, the region of the notch 115 and the notch 125 may be made such that the basis weight of the absorptive chip 40a is lower than that of the other portion of the absorptive chip 40a.

The notch 115 and the crotch portion 125 are provided along the edge portion of the crotch portion 200 in the longitudinal direction L of the product. Further, even if the notch 115 and the notch 125 are formed, the absorptive chip 40a located in the front waistline region 20 and the back waistline region 30 and the absorptive chip 40a located in the crotch region 25 are preferably not completely provided. Cut off, especially in the width direction.

The notch 115 and the notch 125 have a length in the longitudinal direction L of the product which gradually increases toward the outer side in the width direction W of the product. According to the above shape, since the outer side of the product width direction W of the absorbent chip 40a is easily contracted, it is easier to form a flat "bottom". and, Since the absorptive chip 40a positioned closer to the front waistline region 20 than the notch 115 and the absorptive chip 40a positioned closer to the back waistline region 30 than the notch 125 are erected by the "bottom" and become easy to wear along. The roundness of the user's body (abdomen and buttocks) is curved, so that the shape of the disposable disposable diaper can be closer to the shape of the wearer's body.

Further, the edge portion of the notch 115 (notch 125) close to the front waistline region 20 (the rear waistline region 30) has an arc shape. The edge of the notch 115 (notch 125) has a shape in which the center of the arc is located closer to the rear waistline region 30 than the edge. With the above shape, deformation caused by the roundness of the wearer's body is more easily and significantly caused.

(4) Method for manufacturing disposable disposable diaper

Next, an example of a method of manufacturing the absorbent article according to the present embodiment will be described. Further, as for the method not described in the present embodiment, a conventional method can be used. Further, the production method described below is an example, and it can also be manufactured by another manufacturing method. The method for producing an absorbent article includes at least a step of forming a component, a step of placing a component, a step of forming a leg, and a cutting step.

The step of forming the component parts forms a component part for constituting the absorbent article. Specifically, for example, the absorbent material is laminated by laminating the absorbent material.

In the step of placing the component parts, the stretchable sheet constituting the leg stretchable portion 75, the filament-shaped elastic member constituting the auxiliary stretchable portion 76, or the surface layer sheet is placed on the film constituting the back sheet. Other components such as a diaphragm, a leak-proof sheet, or an absorbent body, etc., constitute a component of the disposable disposable diaper 10.

More specifically, the stretchable sheet constituting the leg stretch portion 75 is stretched and further transferred to the intermittent drum while being displaced in the width direction, and the stretchable sheet is cut into the intermittent drum. The length of each article. The interval between the stretchable sheets is set with the rotation of the batch drum, and the stretch sheets are transferred onto the continuous film. Thereby, the leg stretchable portion can be arranged in a curved shape.

In the step of forming the leg, the surface sheet 50, the exterior sheet 60, and the back sheet 60a are cut along the outer end portion in the width direction of the leg stretch portion 75. Thereby, the leg-opening opening 35 which is disposed in the leg circumference of the wearer is formed.

In the cutting step, the continuous body in which the surface sheet 50, the back sheet 60a, the absorber 40, and the like are disposed is cut into the size of one product in the product width direction W. Thereby, the disposable disposable diaper 10 is manufactured.

(5) Function and effect

The disposable disposable diaper according to the present embodiment includes the leg stretchable portion 75 and the auxiliary stretchable portion 76, and the auxiliary stretchable portion 76 is disposed to be biased toward the back waistline region side, so that the disposable paper can be configured. The elements of the diaper are closer to the side of the buttocks than the abdomen side. Specifically, it is possible to provide a contraction region composed of the auxiliary stretchable portion at a position in contact with the buttocks having a large amount of expansion and contraction of the skin surface due to the movement of the wearer. Thereby, the disposable disposable diaper can be used to follow the movement of the skin of the buttocks.

Further, the leg stretchable portion 75 is disposed along the leg-opening portion and closes the leg-opening portion to the wearer's leg circumference. By overlapping the auxiliary stretchable portion 76 and the leg stretch portion 75, the paper diaper is brought close to the buttock side by the auxiliary stretch portion 76, and the leg opening portion can be disposed along the leg circumference by the leg stretch portion 75. In addition, not only the elongation of the leg stretchable portion 75 but also the disposable disposable diaper can be configured to follow the movement of the buttocks.

Further, the auxiliary stretchable portion 76 is disposed apart from the leg stretchable portion 75 at a plane angle of view of the disposable disposable diaper. Since the auxiliary stretchable portion 76 is separated from the leg stretchable portion 75, the auxiliary stretchable portion 76 and the leg stretchable portion 75 do not interfere with each other and can be contracted independently.

The end portion 76F on the front waistline region side of the auxiliary stretchable portion 76 is disposed on the rear waistline region side in the width direction inner end region on the inner side in the product width direction of the leg stretch portion 75 located in the crotch region. By arranging the auxiliary stretchable portion 76 rearward than the inner end region in the width direction, the disposable diaper does not approach the underarm region, and the disposable diaper can be easily placed close to the rear waist region.

The auxiliary expansion-contraction portion 76 is disposed on the outer side in the product width direction of the second joint portion 81B which is the base end portion of the leg-side gather portion. For example, when the auxiliary expansion-contraction portion 76 is disposed on the inner side in the width direction of the second joint portion 81B, the inner side of the second joint portion 81B in the width direction is raised by the auxiliary stretch portion 76, and the contraction portion 84 is oriented. It is possible to stand up on the outside in the width direction. However, by the auxiliary expansion and contraction portion 76 The outer side of the second joint portion 81B is disposed in the width direction, and the contraction portion 84 is easily erected toward the wearer side.

Further, since the absorbent body is provided with the crotch expansion-contraction portion 200a, the end portion of the crotch elastic-contraction portion 200a in the longitudinal direction of the product is formed as a meandering point, so that the absorbent body is easily deformed. Further, since the low-rigidity portion is formed on the inner side in the longitudinal direction of the product than the crotch expansion-contraction portion, and the absorbent chip 40a positioned closer to the front waistline region 20 than the low-rigidity portion, and positioned closer to the rear waistline than the low-rigidity portion The absorptive chip 40a of the region 30 is erected by the "bottom" and is easily bent along the roundness of the wearer's body (abdomen and buttocks), so that the shape of the disposable diaper can be used closer. The shape of the wearer's body.

Further, the end portion 76F on the front waistline region side of the auxiliary stretchable portion 76 is positioned between the end portion 200aF on the front waistline region side and the end portion 200aR on the back waistline region side in the longitudinal direction of the product, and is assisted. The end portion 76R on the rear waistline region side of the stretchable portion 76 protrudes outward in the longitudinal direction of the product from the crotch stretchable portion 200a. In a state in which the crotch region is positioned to face the wearer's strand by the crotch expansion-contraction portion 200a, the region that is contracted by the auxiliary telescopic portion 76 can be placed on the wearer's buttocks.

Since the outer end portion of the auxiliary stretchable portion 76 in the product longitudinal direction is disposed on the inner side in the longitudinal direction of the product from the waistline holding portion, the waistline holding portion and the auxiliary stretchable portion 76 do not interfere with each other when contracting. Therefore, it is possible to suppress not only the displacement of the waist-retaining portion in the longitudinal direction of the product due to the influence of the auxiliary telescopic portion 76, but also the wearer along the length of the article. The waist circumference is provided with a waist holding portion.

Since the outer end portion of the auxiliary stretchable portion 76 in the longitudinal direction of the product is disposed on the inner side in the longitudinal direction of the product in the longitudinal direction of the product of the leg stretchable portion 75, at least the outer side in the longitudinal direction of the product of the leg stretchable portion 75 is provided. The end portion can function without being affected by the auxiliary expansion-contraction portion 76, and can prevent the leg stretch portion 75 from being displaced in the longitudinal direction of the product.

(6) Other implementations

As described above, the disclosure of the present invention is not intended to limit the scope of the present invention. From the above disclosure, those skilled in the art to which the invention pertains can obtain various alternative embodiments, embodiments, and application techniques.

For example, the auxiliary expansion/contraction portion 76 may be arranged in a curved shape instead of being arranged in a straight line. Further, although the leg stretchable portion 75 and the auxiliary stretchable portion 76 are separated in the width direction, they may be arranged to partially overlap each other.

Further, the end portion 76F on the front waistline region side of the auxiliary stretchable portion 76 may be disposed to coincide with the width direction inner end region 75I of the leg stretch portion 75 in the longitudinal direction of the product, or may be disposed to be larger than the leg stretch portion 75. The inner end region 75I in the width direction may be further on the side of the front waist region.

The auxiliary expansion and contraction portion 76 may be disposed so as to be aligned with the joint portion 81B of the leg side pleat portion in the product width direction, or may be disposed to be longer than the leg portion. The joint portion 81B of the side gusset portion may be further inward in the product width direction.

The end portion on the front waistline region side of the auxiliary stretchable portion 76 may be disposed closer to the front waistline region than the end portion on the front waistline region side of the crotch elasticized portion, or may be disposed closer to the rear waistline region side of the crotch elasticized portion. The department can also be on the side of the front waist area.

At least one of the end portion on the front waistline region side of the auxiliary stretchable portion 76 and the end portion of the rear waistline region of the auxiliary stretchable portion 76 may be disposed closer to the outer side in the longitudinal direction of the product than the waistline holding portion, or may be disposed more than the leg portion. The outer end portion of the stretchable portion 75 in the longitudinal direction of the product is further outward in the longitudinal direction of the product.

Further, in the above-described embodiment, the disposable disposable diaper is described as an example, but the present invention is also applicable to a disposable diaper for a pants type. The front waist region of the pants-type diaper having the waist portion opening portion and the pair of leg-opening portions by joining the right and left side edges of the outer sheet forming the front waist region and the back waist region The outer sheet of the rear waist region has an elastic member that can be contracted and elongated in the product width direction W, and the disposable disposable diaper is held by the wearer's waist portion by shrinking the elastic member. In other words, the range in which the left and right side edge portions extending in the longitudinal direction L of the product are joined is formed as a waistline holding portion.

In addition, the disposable diaper of the present modification may be provided with a leg gather portion formed by a rope-shaped elastic member instead of the leg gather portion formed by the stretchable nonwoven sheet.

As described above, the present invention of course also includes those not described herein. Various embodiments and the like. Therefore, the technical scope of the present invention is defined only by the specific matters of the invention of the patent application scope which is effective according to the above description.

In addition, the contents described in the specification of the present invention refer to the entire contents of Japanese Patent Application No. 2012-103461 (filed on Apr. 27, 2012).

[Industry Utilization]

Provided is a disposable disposable diaper that can not only suppress irritation to the skin, but also follow the wearer's foot movement.

10‧‧‧Disposable disposable diapers

20‧‧‧ Front waist area

25‧‧‧胯下区域区

30‧‧‧After waist area

35‧‧‧ leg opening

40‧‧‧ absorber

70‧‧‧Flanking

75‧‧‧ Leg flexion

75F‧‧‧End of the front waistline side of the leg extension

75I‧‧‧The inner end region in the width direction of the leg extension

75R‧‧‧End of the rear waistline area of the leg extension

76F‧‧‧End of the front waistline side of the auxiliary telescopic part

76R‧‧‧End of the rear waistline side of the auxiliary telescopic part

80‧‧‧ leg side pleats

84‧‧‧Contraction

85‧‧‧Waist expansion and contraction

90‧‧‧ buckle

90F‧‧‧End of the front waistline side of the buckle

95‧‧‧ Target

End of the rear waistline area of the target of the 95R‧‧‧ target

115‧‧‧ gap

125‧‧‧ gap

200‧‧‧ Pants Department

200a‧‧‧ Pants Department

End of the front waistline area of the 200aF‧‧‧ crotch expansion joint

End of the rear waistline area of the 200aR‧‧‧ crotch expansion joint

D1‧‧‧ Interval on the end of the front waistline area of the leg extension

D2‧‧‧ Interval on the end of the rear waist region of the leg extension

F1‧‧‧After-use disposable diapers

L‧‧‧Product length direction

W‧‧‧Product width direction

Claims (7)

A disposable disposable diaper having a front waistline region, a rear waistline region, and a crotch region between the front waistline region and the rear waistline region, and having: a front waistline region from the front waistline region The longitudinal direction of the product in the region and the width direction of the product orthogonal to the longitudinal direction of the product, and an absorbent body spanning the underarm region and facing the front waist region and the rear waist region from the underarm region At least one of the legs is extended, and the leg stretchable portion is disposed along the leg-opening portion provided on the outer side in the product width direction of the absorbent body, and is expandable and contractible along the longitudinal direction of the product, and is characterized in that the leg is The surrounding opening portion and the leg stretchable portion are gradually extended outward in the product width direction from the crotch region toward the outer side in the longitudinal direction of the product, and between the absorbent body in the product width direction and the leg stretchable portion. And an auxiliary expansion-contraction portion that is contractible along the longitudinal direction of the product, and the auxiliary expansion-contraction portion is configured as before The center of the longitudinal direction of the article towards the rear waist region-side bias, elongation of the article in the longitudinal direction of the auxiliary telescoping portion, based elongation is higher than the longitudinal direction of the article telescopic leg portion. The disposable disposable diaper according to the first aspect of the invention, wherein the auxiliary stretchable portion is a flat surface of the discarded disposable diaper The viewing angle is configured to be separated from the aforementioned leg extension. The disposable diaper according to claim 1 or 2, wherein the leg stretchable portion has an inner end region in the width direction on the inner side in the product width direction in the crotch region. An end portion of the auxiliary stretchable portion on the front waistline region side is disposed closer to the rear waistline region than the inner end region of the leg stretchable portion in the width direction. The disposable disposable diaper according to the first or second aspect of the invention, further comprising: an upright leg-side expansion-contraction portion disposed on the inner side in the product width direction of the leg-retracting portion, and having The contraction portion that is expandable and contractible in the longitudinal direction of the product may be disposed on the outer side in the product width direction from the base end portion of the leg-side expansion-contraction portion. The disposable disposable diaper according to the first or second aspect of the invention, wherein the absorbent body arrangement region in which the absorbent body is disposed is formed in the crotch region, and the elastic member is expandable and contractible in the longitudinal direction of the product. An end portion of the auxiliary elastic-contraction portion on the side of the front waistline region is closer to the rear waistline region than the end portion on the front waistline region side of the crotch expansion-contraction portion, and is disposed on the rear waistline region of the crotch expansion-contraction portion. The end portion on the side of the rear waistline region is further on the side of the front waistline region. The disposable diaper according to claim 1 or 2, wherein the front waistline region and the rear waistline region have a disposable diaper for retaining the disposable disposable diaper. Waist circumference In the holding portion, the outer end portion of the auxiliary stretchable portion in the longitudinal direction of the product is disposed on the inner side in the longitudinal direction of the product from the waistline holding portion. The disposable diaper according to the first or second aspect of the invention, wherein the outer end portion of the auxiliary stretchable portion in the longitudinal direction of the product is disposed in the longitudinal direction of the product of the leg stretchable portion. The outer end portion is further inward of the longitudinal direction of the article.