TW201517887A - Disposable diaper - Google Patents

Abstract

A disposable diaper (10) comprising: an absorbent body (40) having an absorbent core; a pair of fastening tapes (90); a waist expansion/contraction sheet having expansion/contraction properties in the product width direction; and a waist holding section that holds the disposable diaper on to the body of a wearer. The waist expansion/contraction sheet has: a rear-side waist expansion/contraction sheet (85) arranged in the rear waist area; and a front-side waist expansion/contraction sheet (86) arranged in the front-side end section in the front waist area. Some of the rear-side waist expansion/contraction sheet is arranged overlapping the rear-side end section of the absorbent core and is arranged overlapping the waist holding section. The front-side waist expansion/contraction sheet is arranged adjacent to the front-side end section of the absorbent core.

Description

Disposable diapers

The present invention relates to a disposable diaper.

In the past, it has been known to have an absorbent body having a front waist region, a back waist region and a subgluteal region, and extending across the gluteal region to the front waist region and the back waist region, and a fixed adhesive front waist region and a back waist region. A disposable diaper of a fastening tape (for example, refer to Patent Document 1).

In general, the fastening tape extends outward in the width direction from the outer end portion in the width direction of the back waist region of the disposable diaper. When the disposable diaper of the patent document 1 is worn, the adhesive tape of the back waist area is pulled toward the front waist area in a state in which the lower part of the diaper is disposed under the wearer's buttocks. The adhesive strip is fixedly attached to the front waist area.

Moreover, in the waist opening portion of the disposable diaper of Patent Document 1, an elastic member that expands and contracts in the width direction is disposed. The waist opening of the disposable diaper is closely attached to the waist of the wearer by the expansion and contraction of the elastic member.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2006-20665

However, the above-mentioned disposable diapers have the following problems.

In the disposable diaper of Patent Document 1, the region extending from the fastening tape in the width direction is disposed separately from the elastic member. An area in which the region extending from the fastening tape in the width direction and the elastic member are disposed is attached to the body of the wearer. However, the portion between the region extending from the fastening tape in the width direction and the elastic member does not fit on the wearer's body, and floats from the region in which the adhesive tape extends in the width direction, and the adhesive is bonded. The zone extending in the width direction produces a phase difference.

Further, the absorbent chip of the absorbent body is made of an absorbent material such as pulverized pulp, and the thickness of the region in which the absorbent chip is disposed is thicker than the thickness of the region where the absorbent chip is not disposed. Further, in the region where the elastic member is disposed, the thickness of the elastic member is thicker than the state before the shrinkage. Therefore, the thickness of the disposable diaper near the waist opening portion becomes thicker than the thickness of the constituent member itself.

The disposable diaper of Patent Document 1 is separated from the elastic member and the absorbent chip. Elastic member and absorbent chip The thickness of the region is thinner than the thickness of the region in which the elastic member is disposed, and is thinner than the thickness at which the absorptive chip region is disposed. Therefore, a step difference occurs between a region between the elastic member and the absorptive chip and a region where the elastic member is disposed, and a region is formed between the region between the elastic member and the absorptive chip and the region where the absorptive chip is disposed. The stage is poor.

On the other hand, in recent years, the demand for users (purchasers) from disposable diapers has become high, and in particular, when the baby is worn, the burden on the skin such as the burden on the baby is minimized. The requirement, or the so-called appearance that looks close to the appearance of the undergarment, becomes higher.

However, in the above-mentioned disposable diapers, since the disposable diapers are formed with a plurality of stages, the difference between the users and the user feels that the stage difference is irritating to the skin, which is caused by the stage difference. The disposable diaper is functionally conspicuous and has a dissatisfaction with the requirements close to the appearance of the underpants.

Here, the present invention has been made in view of such circumstances, and an object of the present invention is to provide a disposable diaper that can suppress dissatisfaction with the burden on the skin or dissatisfaction with the appearance.

The disposable diaper (the disposable diaper 10) for use in the present disclosure is provided with a front waist area (front waist area 20), a back waist area (back waist area 30), and the foregoing The subgluteal region between the waist region and the above-mentioned back waist area (the lower hip region 25), and from the upper a longitudinal direction of the product in which the front waist region extends toward the rear waist region (product longitudinal direction L), a product width direction (product width direction W) orthogonal to the longitudinal direction of the product, and a cross-bottom domain An absorber (absorbent body 40) having an absorbent chip extending to at least one of the front waist region and the back waist region, and an outer end portion disposed in the product width direction of the rear waist region and fixedly attached to the front waistline a pair of adhesive tapes (bonding tapes 90), and a waist-stretching stretch sheet extending across the center of the width direction of the disposable diaper and having a stretch in the width direction of the product, and the front waist region and the rear a waist region extending along the width direction of the product and holding the disposable diaper in the waist circumference holding portion of the wearer's body; the disposable diaper characterized by: the waist stretch sheet having: a rear side waist stretch sheet (a rear side waist stretch sheet 85) of the rear waist region of the rear waist region, and a front side waist stretch sheet disposed at a front side end portion of the front waist region (front The side waist elastic sheet 86) is disposed so as to overlap the rear end portion of the absorbent chip and is disposed to overlap the waist holding portion, and the front waist elastic sheet is adjacent to The front end of the above-mentioned absorbent chip is disposed.

10‧‧‧Disposable diapers

20‧‧‧front waist area

25‧‧‧Under the hip

30‧‧‧Back waist area

35‧‧‧Thigh opening

40‧‧‧ absorber

40a‧‧‧Absorbable chip

40b‧‧‧chip film

50‧‧‧Surface

60‧‧‧Outer sheets

60a‧‧‧back sheet

70‧‧‧Flanking

75‧‧‧Thigh expansion joint

75F‧‧‧ front side

75R‧‧‧ rear end

77‧‧‧Auxiliary expansion department

77F‧‧‧ front side

77R‧‧‧ rear end

80‧‧‧Thigh side hem

81‧‧‧Flexible components

85‧‧‧Back waist stretch sheet

85F‧‧‧ front side

85R‧‧‧ rear end

86‧‧‧Front waist stretch sheet

86F‧‧‧ front side

86R‧‧‧ rear end

90‧‧‧Buckle belt

91‧‧‧Substrate sheet

92‧‧‧ hook sheet

93‧‧‧ base

94‧‧‧Extension

95‧‧‧Bucking Department

110‧‧‧Low rigidity

L‧‧‧ product long-side direction

W‧‧‧Product width direction

Fig. 1 is a developed plan view showing an extended state of the disposable diaper of the present embodiment.

Fig. 2 is a plan view showing a natural state of a part of the disposable diaper of the present embodiment.

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

Fig. 4 is a cross-sectional view of the disposable diaper used along the line F2-F2 shown in Fig. 1.

Next, an embodiment of the disposable diaper 10 according to the present invention will be described with reference to the drawings. In the following description, the same or similar symbols are attached to the same or similar parts. However, the intentional surface should be left as a schematic diagram, and the ratio of each size is different from the actual one.

Therefore, the specific dimensions and the like should be judged by referring to the following description. Further, the drawings may also contain portions having different dimensional relationships or ratios from each other.

(1) The overall outline of disposable diapers

Fig. 1 is a developed plan view showing an extended state of the disposable diaper 10 of the present embodiment. Fig. 2 is a plan view showing a natural state of a part (rear end side) of the disposable diaper according to the embodiment. Fig. 3 is a cross-sectional view of the disposable diaper used along the line F1-F1 shown in Fig. 1. Fig. 4 is a cross-sectional view of the disposable diaper used along the line F2-F2 shown in Fig. 1.

In the extended state shown in Fig. 1, the elastic member 81 of the thigh stretchable portion 75 and the thigh side hem 80 is extended to a disposable shape. The surface sheet 50 of the diaper, the side flaps 70, and the like are in a state in which wrinkles are not formed. On the other hand, the natural state is taken out from the package in the case where the disposable diaper 10 is sealed in a package or the like, and is in an environment of 20 ° C ± 2 ° C and a relative humidity of 60% ± 5% RH in this state. Placed under the state for 12 hours. In the disposable state, the disposable diaper is formed with wrinkles on the surface sheet 50, the side flaps 70, and the like of the disposable diaper.

The disposable diaper 10 is a disposable diaper in the form of a Velcro tape. The form of the Velcro tape refers to the outer end portion in the product width direction of the front waist region and the outer end portion in the product width direction of the back waist region, which are not joined before use, and are fixedly adhered by a fastening tape or the like during use. A diaper that joins the components.

The disposable diaper 10 includes a front waist region 20, a lower hip region 25, and a back waist region 30. The front waist region 20 is a portion that comes into contact with the front waist circumference (abdomen portion) of the wearer. Further, the back waist area 30 is a portion that comes into contact with the back waist portion (back portion) of the wearer. The subgluteal region 25 is located between the front waist region 20 and the back waist region 30.

Further, in the present embodiment, the direction in which the front waist region 20 extends toward the rear waist 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 diaper 10 includes an absorber 40 that extends across the gluteal region 25 and extends from at least the gluteal region 25 toward at least one of the front waist region 20 and the back waist region 30. The absorber 40 is composed of an absorbent chip 40a and a die pad film 40b.

The absorptive chip 40a is used in the past The pants are the same, and can be suitably formed using a known member or material such as pulverized pulp or a superabsorbent polymer. The absorptive chip 40a is surrounded by a sheet-like chip adhesive film 40b. The exterior sheet is a surface that is disposed on the non-skin contact side of the disposable diaper. The exterior sheet is, for example, composed of a non-woven fabric.

The chip adhesive film 40b is a sheet covering the absorbent chip 40a. At least a part of the surface of the chip film 40b on the skin surface side is composed of various fiber nonwoven fabrics or fiber paper sheets having liquid permeability. For example, an air-through fiber nonwoven fabric, a spunbond nonwoven fabric, an SMS (spunbond-meltblown-spunbond) nonwoven fabric having a mass of about 10 to 30 g/m ² or a mass of about 10 to 30 g/ can be used. A fibrous paper sheet of m ² .

The absorber 40 in the back waist region is provided with a base portion having a lower basis weight than the other portions of the absorber or a low rigidity portion 110 having no low rigidity region in which the absorbent chip 40a is absent. The low-rigidity portion 110 has a shape in which the length in the product width direction is gradually shortened from the center in the product width direction of the end portion on the back waist region side of the absorber 40 toward the front waist region side. More specifically, the disposable diaper for planar observation is wedge-shaped. Further, the boundary between the absorptive chip 40a and the low-rigidity portion 110 is formed by an arc projecting toward the center of the product width direction W. The absorber 40 which is located on the outer side in the product width direction from the low-rigidity portion 110 has a trapezoidal shape which is convex toward the end portion on the side of the rear waist region.

Further, the thickness of the end portion of the product in the longitudinal direction of the absorbent chip is thinner than the thickness at the center in the longitudinal direction of the product of the absorbent chip. More preferably, the thickness of the portion of the rear waist stretch panel overlapping the absorbent chip is thicker. The degree is preferably thinner than the thickness of the portion which is not overlapped with the rear waist elastic sheet at the end portion in the longitudinal direction of the product of the absorbent chip.

The thickness adjustment can be achieved by reducing the basis weight of the absorptive chip and applying embossing. In addition, the measurement of the thickness can be measured using PEACOCK DIAL THICKNESS GAUGE manufactured by Ozaki Manufacturing Co., Ltd. The measurement terminal was adjusted to have a diameter of 10 mm, a circular shape, and a load of 6.0 gf/cm ² to measure the measurement site. The measurement of the thickness is measured in an extended state of the disposable diaper after use.

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

The back sheet 60a is disposed closer to the inner side in the longitudinal direction of the product than the front end portion 10F of the disposable diaper, and is closer to the inner side in the longitudinal direction of the product than the rear end portion 10R of the disposable diaper. . The back sheet 60a is disposed closer to the inner side in the product width direction than the end portion of the disposable diaper in the product width direction.

The side flaps 70 are provided on the side edges of the absorber 40 in the product width direction W, respectively. The side flaps 70 are disposed across the front waist region 20, the lower hip region 25, and the back waist region 30, and are disposed closer to the outer side in the product width direction than the absorber 40. The side flaps 70 are formed by one sheet or a plurality of sheets of non-woven fabrics stacked in two or more sheets.

A pair of thigh opening portions 35 are formed in the side flaps 70 of the disposable diaper 10 after use. The thigh opening portion 35 is a side end portion provided in the product width direction of the disposable diaper, and is a portion disposed along the leg circumference of the wearer in a state where the disposable diaper is worn by the wearer. . The thigh opening portion 35 is recessed toward the center of the product width direction of the absorbent body.

Further, each of the pair of side wings 70 is provided with a fastening tape 90. The fastening tape 90 is disposed on the outer side in the width direction of the product in the back waist region and is fixedly adhered to the front waist region. The fastening tape 90 extends outward from the side wings 70 in the product width direction. In the back waist region 30, the disposable diaper 10 is held by the wearer's body by extending along the product width direction W and fixing the non-skin contact surface of the front waist region 20.

The adhesive labeling portion 95 is a non-skin contact surface disposed in the front waist region, and is configured to fix and adhere a pair of fastening tapes 90, respectively.

For the surface sheet and the exterior sheet, a non-woven sheet having a high basis weight portion and a low basis weight portion in the product width direction can be used. By using such a surface sheet, the force concentrates on the boundary between the high base portion and the low basis weight portion, contributing to elongation of the extensible portion and exhibiting elongation. As a modification, the surface sheet and the exterior sheet may be formed of a non-woven sheet having at least a high-density portion and a low-density portion in the product width direction. The high-density portion of the non-woven sheet having the high-density portion and the low-density portion is formed by a continuous line or a state in which the dots are arranged at intervals.

The non-woven fabric sheet constituting the surface sheet or the outer sheet is a sheet having a heat-melting point which is not embossed using dots or lines, or a sheet having an area ratio of 5% to 15% of dot or line embossing. Composition. The area ratio of embossing is the ratio at which the embossed area is formed. For example, the area of the entire outer sheet is embossed with respect to the area of the outer sheet.

In the present embodiment, the waistline holding portion is formed by the front waist region 20, the back waist region 30, and the fastening tape 90. The waistline holding portion of the back waist region 30 is a range extending from the region where the engaging portion of the fastening tape 90 is provided in the product width direction. The waistline holding portion of the front waist region 20 is a range extending from the region where the hook portion 95 is provided in the product width direction.

The side flaps 70 are disposed so as to be disposed closer to the inner side in the product width direction than the thigh opening portion 35 and closer to the outer side in the product width direction than the absorbent body 40, and can be stretched toward the product longitudinal direction L by one of the pair of thigh expansion and contraction portions 75. .

The thigh expansion and contraction portion 75 may be configured such that the thigh opening portion 35 can be expanded and contracted in the longitudinal direction of the product, and may be disposed along the thigh opening portion 35 or partially in a state of being inclined with respect to the thigh opening portion 35.

Further, the auxiliary stretchable portion 77 is disposed so as to be stretched in the longitudinal direction of the product and disposed in the longitudinal direction of the product, and is disposed closer to the outer side in the product width direction than the thigh expansion and contraction portion 75. By the contraction of the region of the side flap 70 provided with the auxiliary telescopic portion 77, the side flap 70 will be swelled along The wearer's buttocks are covered by the area.

In addition, the thigh expansion-contraction part 75 and the auxiliary expansion-contraction part 77 are the part which shrinks substantially toward the longitudinal direction of the product by the elastic member, such as a linear- .

The thigh expansion and contraction portion 75 is composed of three elastic members on each of the single sides that are expanded and contracted in the longitudinal direction of the product. The auxiliary expansion/contraction portion 77 is composed of one elastic member per one side that is expanded and contracted toward the longitudinal direction of the product. The elastic member according to the present embodiment is composed of polyurethane elastic fiber or natural rubber.

The rear end portion 75R of the thigh expansion and contraction portion 75 is disposed closer to the front side than the fastening tape 90 and closer to the inner side in the product width direction than the fastening tape. Therefore, by the thigh expansion and contraction portion 75, the region on the front side and the inner side in the width direction is contracted more than the fastening tape 90.

The front end portion 77F of the auxiliary stretchable portion 77 is disposed closer to the rear side than the front end portion 75F of the thigh stretchable portion 75. Therefore, the auxiliary stretchable portion 77 contracts in a region located further rearward than the front end portion 75F of the thigh stretch portion 75. The rear end portion 77R of the auxiliary stretchable portion 77 is disposed closer to the rear side than the rear end portion of the thigh stretch portion. Therefore, the auxiliary stretchable portion 77 contracts in a region located further rearward than the thigh expansion and contraction portion 75.

The lower thigh region of the disposable diaper can be lifted toward the lower part of the wearer's buttocks by the thigh telescopic portion 75. Furthermore, the force generated by the thigh expansion and contraction portion can be transmitted to the fastening tape by the auxiliary expansion and contraction portion 77. 90. Therefore, in the state in which the fastening tape 90 is fixedly adhered, the fastening tape 90 is not only held in the region of the waist of the wearer and the region in which the thigh expansion and contraction portion 75 is disposed, but also the fastening tape 90 and the thigh are easily formed. The area between the expansion and contraction portions 75 is in close contact with the wearer.

Further, the auxiliary stretchable portion can be contracted closer to the outer side in the product width direction than the thigh stretchable portion, and the side flap of the back waist region can appropriately cover the buttocks. Therefore, it is possible to particularly suppress the curling of the rear thigh opening when worn. Moreover, the contraction of the thigh expansion and contraction portion can bring the thigh opening portion closer to the body side, and the displacement of the thigh opening portion can be suppressed.

The thigh expansion and contraction portion 75 is disposed between the side flaps 70 and the exterior sheet 60. Alternatively, the thigh stretchable portion 75 is disposed between the back sheet 60a and the side flaps 70 in a region provided with the back sheet 60a disposed between the absorber 40 and the exterior sheet 60.

The elongation of the thigh expansion and contraction portion 75 is preferably 1.7 to 2.4 times. In the present embodiment, the elongation of the thigh expansion and contraction portion 75 is set to 1.9 to 2.2 times. Moreover, the elongation means the degree of elongation of the thigh stretched portion, and is defined as follows.

Elongation of the thigh expansion joint = (length of the thigh expansion and contraction portion in the extended state) ÷ (the length of the thigh expansion and contraction portion in the natural state)

Further, the elongation of the auxiliary stretchable portion 77 is preferably 1.6 to 2.4 times. Moreover, the elongation of the auxiliary stretchable portion 77 refers to the degree of elongation of the auxiliary stretchable portion, and is defined as follows.

Elongation of the auxiliary stretchable portion = (length of the auxiliary stretchable portion in the extended state) ÷ (the length of the auxiliary stretchable portion in the natural state)

Further, in this patent specification, the elongation is measured, for example, as follows.

First, in the case where the disposable diaper 10 is sealed in a package or the like, the disposable diaper 10 is taken out from the package. Next, the arrangement area of the measurement target such as the thigh expansion unit is cut out. At this time, the measurement sheet attached to the thigh expansion-contraction unit or the like is also included and cut. The elongation of the sample after the cutting was measured, and the elongation of the measurement object was measured.

For each sample, after standing for 60 minutes in an environment of 20 ° C ± 2 ° C and a relative humidity of 60% ± 5% RH, the length of the measurement object was measured along the stretching direction. This length is referred to as "the length of the measurement target of the natural state (such as the thigh expansion portion).

Secondly, the length in the direction of expansion and contraction of the predetermined region in this state (that is, the natural state), and the wrinkles extending from the natural state to the elastic member cannot be visually confirmed on the non-stretchable sheet. The length in the direction of expansion and contraction of the predetermined area in the state is measured. This length is referred to as "the length of the object to be measured in the stretched state (such as the thigh stretched portion).

Using these measurement results, the elongation was measured by the above formula calculation.

Moreover, the measurement of "length" in this patent specification is performed by the following measurement method.

In the case where the disposable diaper 10 is sealed in a package or the like, a sample which is taken out from the package and placed in an environment of 20 ° C ± 2 ° C and a relative humidity of 60% ± 5% RH for 12 hours is used.

Next, a spring messure (rolling tape: glass fiber incorporation, vinyl chloride coating) manufactured by Shinwa Rules Co., Ltd. was used to measure the measurement target portion along the measurement target portion. The length of this state. Further, the length of the stretched state is measured by extending the disposable diaper 10 from a natural state to a length of the measurement target portion when the wrinkles caused by the elastic member cannot be visually confirmed.

Here, for the 10 samples, the above measurement was performed in each state, and the average value was taken as the length.

Further, on one side of the pair of thigh expansion-contraction portions 75 (located on the center side in the product width direction W), one of the pair of thigh side hem 80 is extended along the product longitudinal direction L. The thigh side hem 80 is an inner end portion provided in the product width direction of the side flap 70, and is an upright stretch hem disposed closer to the inner side in the product width direction than the thigh stretch portion 75. The thigh side hem 80 is disposed closer to the inner side in the product width direction than the thigh expansion portion 75. The thigh side hem 80 can be formed by a conventional configuration, and specifically, can be formed by a sheet material different from the side flap 70.

The disposable diaper 10 is provided with a waist-contracting sheet having a stretchable center in the product width direction across the disposable diaper. Waist stretch sheet, equipped with: The rear side waistline stretch sheet 85 of the rear side end of the disposable diaper, and the front side waist stretch sheet 86 disposed at the front side end portion of the disposable diaper. Further, in Fig. 1, the imaginary line L1 which passes through the center of the product width direction of the disposable diaper and extends in the longitudinal direction of the product is shown.

The rear end portion 10R of the disposable diaper has a product width direction center having the rear side end portion 10R in the natural state of the disposable diaper in use, and is more outward than the product width direction outer side of the rear side end portion 10R. The curved shape of the product is recessed on the inner side in the longitudinal direction. The rear end portion of the rear waistline stretchable sheet 85 at the rear end portion of the disposable diaper is also naturally recessed toward the inner side in the product longitudinal direction from the outer side in the product width direction in the natural state. Curved shape.

Further, in the extended state (the state shown in Fig. 1) in which the disposable diaper is stretched after use, the front end portion 85F of the rear side waist stretch panel 85 has a product width direction center of the front side end portion 85F than the front side end. The outer portion of the portion 85F in the product width direction is further curved toward the outer side in the longitudinal direction of the product. Further, the curved shape of the rear waist elastic sheet is not formed in the entire region of the front end portion 85F, but is formed at the center in the width direction of a part of the front end portion.

The rear waist elastic sheet 85 is disposed between the one of the fastening strips located in the width direction of the product. A part of the front end portion 85F of the rear waist elastic sheet 85 is overlapped with the absorbent chip 40a. The rear side end portion 85R of the rear waist elastic sheet 85 coincides with the rear end portion of the disposable diaper. The length of the rear waist elastic sheet 85 in the product width direction The degree is longer than the length of the absorbent chip 40a in the product width direction and longer than the length of the back sheet 60a in the width direction. The rear waist elastic sheet extends outward from the absorbent core 40a in the product width direction and extends outward in the product width direction from the back sheet 60a. A part of the rear waist elastic sheet 85 is disposed to overlap the waistline holding portion.

The front side end portion 10F of the disposable diaper has a natural state of the disposable diaper after use, and has a product width direction center of the front side end portion 10F which is more toward the product long side than the product width direction outer side of the front side end portion 10F. The curved shape of the inner side of the direction. The front side end portion 86F of the front side waist elastic sheet 86 of the front side end portion of the disposable diaper, in the natural state of the disposable diaper after use, also has a product width direction center of the front side end portion 86F than the front side end The outer portion of the portion 86F in the width direction of the product is more curved toward the inner side in the longitudinal direction of the product.

Further, in the extended state (the state shown in Fig. 1) of the disposable diaper after use, the rear side end portion 86R of the front waist elastic sheet 86 has a product width direction center ratio of the rear side end portion 86R. The side end portion 86R has a curved shape in which the outer side in the product width direction is recessed toward the outer side in the longitudinal direction of the product. Further, the curved shape of the front waist elastic sheet is not formed in the entire rear end portion 86R but in the center in the width direction of a part of the rear end portion 86R.

The front waist elastic sheet 86 is adjacent to the absorbent chip 40a and the hook portion 95 in the longitudinal direction of the product. More specifically, the rear side end portion 86R of the front waist elastic sheet 86 is adjacent to the absorbent chip. The front end of 40a is adjacent to the front end of the hook portion 95. The rear end portion 86R of the front waist elastic sheet 86 is located outside the absorbent chip 40a in the longitudinal direction of the product, and is located closer to the outside than the hook portion 95. In addition, the front waist elastic sheet 86 and the absorbent core 40a are adjacent to each other, and the front waist elastic sheet 86 and the hook portion 95 are adjacent to each other, and the distance between them is 0 mm or more and 5 mm or less.

The front end portion 86F of the front waist elastic sheet 86 coincides with the front end portion of the disposable diaper. The length of the front waist elastic sheet 86 in the product width direction is longer than the length of the absorbent chip 40a in the product width direction, and is longer than the length of the back sheet 60a in the width direction. The front waist elastic sheet 86 extends outward from the absorbent core 40a in the product width direction, and extends outward in the product width direction from the back sheet 60a.

The rear end portion 86R of the front waist elastic sheet 86 is adjacent to the absorbent chip 40a in the longitudinal direction of the product, and is adjacent to the hook portion 95. The rear end portion 86R of the front waist elastic sheet 86 is located outside the absorbent chip 40a in the longitudinal direction of the product, and is located closer to the outside than the hook portion 95.

The front side end portion 60aF of the back sheet 60a is located between the front end portion 10F of the disposable diaper and the front end portion of the absorbent chip 40a, and the rear side end portion 60aR of the back sheet 60a is disposed of after use. The rear side end portion 10R of the diaper is interposed between the rear side end portion of the absorbent chip 40a.

In the present embodiment, it is preferable that the waist stretch sheet has a sheet whose width in the second direction orthogonal to the direction of elongation is narrowed (i.e., so-called neck-in) when the sheet is stretched in one direction.

As the waist stretch sheet, a sheet composed of a mixture of an elastic fiber having elastic elongation and a non-elastic fiber having inelastic elongation can be used, and particularly has a mass of 20 to 80 g/m ² and preferably 40 to 75 g. a mass of m/m ² , more preferably a spunbonded nonwoven fabric of a quality of 50 to 70 g/m ² , and a monofilament of a polyurethane fiber having a fineness of 2 to 6 dtex for the elastic fiber, and a non-elastic fiber having a monofilament of at least one of a polyolefin fiber having a fineness of 2 to 6 dtex, a polyester fiber, and a monofilament of a polyamide fiber, and a weight mixing ratio of the elastic fiber and the non-elastic fiber is adjusted at 40:60~ Spunbonded non-woven sheet of 60:40 range. The non-woven fabric of the mixed fiber of the inelastic fiber and the elastic fiber is formed by breaking a part of the inelastic fiber layer by using a gear to exhibit stretchability. As the other waist stretch sheet, as long as it is a necked sheet, it can be easily made into a shape of a reduced width. Further, the waist stretch sheet is not limited to the non-woven sheet, and may be formed of a film sheet. Further, it is also possible to use a sheet in which the stretchable sheet is formed in advance so that the width in the longitudinal direction of the product can be changed (cut in the inward direction).

The waist stretch sheet is attached to the exterior sheet 60 by a hot melt adhesive or heat treatment.

The elongation of the rear waist elastic sheet 85 is preferably 1.4 to 1.8 times. In the present embodiment, the elongation of the rear waist elastic sheet 85 is set to 1.5 to 1.6 times. Also, the elongation means the back side. The extent of elongation of the waist stretch sheet is specified as follows.

Elongation of the back waist elastic sheet = (length of the side waist stretch sheet after the stretch state) ÷ (the length of the side waist stretch sheet after the natural state)

The elongation of the front waist elastic sheet 86 is preferably 1.3 to 1.7 times. In the present embodiment, the elongation of the front waist elastic sheet 86 is set to 1.4 to 1.6 times. In addition, the elongation means the degree of elongation of the front waist elastic sheet, and is defined as follows.

Elongation of the front waist elastic sheet = (length of the side waist stretch sheet before the stretch state) ÷ (the length of the side waist stretch sheet before the natural state)

By providing such a thin waist-shaped stretch sheet, the region in which the waist stretch sheet is disposed (near the waist opening portion) is attached to the body with the face. Therefore, the wearer's body can be appropriately covered. On the other hand, in the configuration in which a plurality of linear elastic members are provided, the linear elastic member portion is attached to the body, but strictly speaking, the portion between the linear elastic members does not abut the body. . Therefore, it will become close to the body with only the line edge, and it is easy to cause a translocation, etc., and cannot fully cover the wearer's body. Moreover, since the waist stretch sheet has elasticity, the sheet itself is excellent in flexibility and can provide a cushioning feeling around the waist. In the state in which the waist stretch sheet is contracted, the portion in which the waist stretch sheet is disposed tends to have a high bulkiness, and the texture is also excellent.

In the present embodiment, the waist stretch sheet is joined to the sheet in which the waist stretch sheet is interposed. Specifically, the waist stretch sheet is disposed between the exterior sheet 60 and the back sheet 60a. However, the die pad film 40b is configured to extend outward in the longitudinal direction of the product from the absorbent chip 40a, and the waist stretch sheet may be disposed on the die pad film 40b, the back sheet 60a or the exterior sheet 60. between. The position of the waist stretch sheet is not particularly limited. Further, the region where the absorber is not disposed may be disposed between the side flaps 70 and the back sheet 60a or the exterior sheet 60. The waist stretch sheet is attached to the exterior sheet 60 or the like by a hot melt adhesive or heat treatment.

In the region where the waist stretch sheet is disposed, the joining of the sheets (specifically, the surface sheet, the back sheet, and the waist stretch sheet) is fixed by an intermittently applied adhesive (hot melt adhesive). The intermittent application means that the linear adhesive is applied in a state of being applied to one side, such as a serpentine or a spiral, without being applied in a planar state.

The rear waist elastic sheet 85 is disposed so as to overlap with a part of the low rigidity portion 110 of the absorbent body when the disposable diaper is used for the plan view. Further, in the present embodiment, the rear waist elastic sheet 85 is disposed to overlap a part of the low rigidity portion 110, but all of the rear waist stretch sheet 85 may be disposed to overlap the low rigidity portion 110.

By forming such a low-rigidity portion 110, the expansion and contraction of the rear side waist stretch sheet 85 is not hindered, and even if the rear waist stretch sheet 85 is contracted, the low rigidity portion 110 is narrowed, and the absorbent body on both sides in the product width direction is interposed. The interval becomes narrower than the low rigidity portion 110, so the absorber 40 does not The Yilongqi became an unexpected shape. The portion in which the low-rigidity portion 110 is formed is not easily swelled, and the low-rigidity portion 110 in which the bulging is difficult is formed in the center in the product width direction of the disposable diaper. Therefore, in the product width direction of the disposable diaper, the stage difference between the absorbent chip and the waist stretch sheet can be suppressed. Further, not only the rear end portion of the absorbent body but also the low rigidity portion may be formed at the front end portion of the absorbent body.

Further, the waist elastic sheet according to the present embodiment is configured to expand and contract in the product width direction, but the waist elastic sheet may be configured to expand and contract in the product width direction and the product longitudinal direction.

The fastening tape 90 is a region that is attached to the side flaps 70 corresponding to the back waist region 30. The fastening tape 90 includes a base sheet 91 that is coupled to the side flaps 70, and a hook sheet 92 that is provided with a plurality of engaging hooks (not shown) as engaging members and that are fixed to the base sheet 91. The hook sheet 92 is a region in which the engaging member is provided, and the above-described waistline holding portion located in the back waist region is a region extending from the hook sheet 92 in the product width direction.

The hook sheet 92 is fixed to the base sheet 91 and specifically joined to the base sheet 91. The joining of the hook sheet 92 to the base sheet 91 is preferably such that the rigidity of the fastening tape 90 does not exceed the required strength. Specifically, it is preferable that the hook sheet 92 and the base sheet 91 are joined by a hot-melt adhesive which is applied intermittently in a dot shape, a line shape or a spiral shape. Further, the hook sheet 92 and the base sheet 91 may be joined by heat sealing or the like.

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

The fastening tape includes a base portion 93 that is superposed on the exterior sheet, and an extending portion 94 that extends outward in the product width direction from the exterior sheet. The base portion 93 is a portion of the base sheet 91 that is superposed on the exterior sheet in a state in which the fastening tape is unfolded. The extending portion 94 is a portion of the base sheet 91 that is not overlapped with the exterior sheet. In the stretched state of the disposable diaper shown in Fig. 1, in the longitudinal direction of the product, the center of the product in the longitudinal direction of the extending portion coincides with the center of the product in the longitudinal direction of the base. However, in the natural state of the disposable diaper, the position of the fastening tape changes with the bending of the rear waist elastic sheet 85, and the center of the product in the longitudinal direction of the extension is located at the longitudinal direction of the product of the base. The center is closer to the outside of the long side of the product.

Further, in the present invention, the state in which the members overlap is not only a state in which the members directly overlap each other, but also a concept in which the members are indirectly overlapped with each other (an overlapping state in which other members are sandwiched).

The hook portion 95 is a non-skin contact side surface of the exterior sheet 60 provided in the front waist region. The hook portion 95 is configured to be hooked to the hook portion of the hook tape, and functions as a loop of the hook and loop locking system. As the part of the adhesive label, for example, an air flow non-woven fabric can be used.

For the adhesive label portion 95, for example, a fiber nonwoven fabric made of a polyolefin-based thermoplastic synthetic resin fiber or a polyolefin-based heat can be used. Plastic synthetic resin film. Further, the ring attached to the portion of the adhesive label can be formed of a polyolefin-based thermoplastic synthetic resin.

Further, as the hook portion 95, a non-woven fabric having a high bulkiness can be used, and a part of the non-woven fabric can be prevented from being woven by a embossing.

Further, the outer sheet 60 of the disposable diaper can be formed by using a non-woven fabric, and the pattern showing the position at which the fastening tape 90 is attached can be printed on the non-skin abutting side of the back sheet 60a or the outer sheet 60. Alternatively, the pattern sheet may be placed on the non-skin contact side of the back sheet 60a or the exterior sheet 60 to form a label.

When wearing a disposable diaper, wear the accessory, and pull the buckle belt of the back waist area toward the front waist area. Wearing the assistant, the adhesive tape is fixedly adhered to the labeling portion in the state in which the fastening tape is pulled to the front waist region.

(2) Manufacturing method of disposable disposable diaper

Next, an example of a method for producing a disposable diaper according to the present embodiment will be described. Further, regarding the method not described in the embodiment, an existing method can be used. Moreover, the manufacturing method demonstrated below is only an example, and can also be manufactured by another manufacturing method. The manufacturing method of the disposable diaper includes at least a component forming step, a component placing step, a leg circumference forming step, and a cutting step.

The disposable diaper is manufactured by continuously manufacturing it in a continuous state in the longitudinal direction of the disposable diaper product. The continuum is cut into a product size along the product width direction W to produce a disposable diaper.

In the component forming step, the component parts of the disposable diaper are formed. Specifically, for example, the absorbing material is laminated to form the absorbing chip 40a.

In the component mounting step, the belt stretched sheet and the continuous strip material constituting the surface sheet are placed on the continuous strip material constituting the back sheet, and the other strip material, the absorber, and the thigh stretch portion are formed. 75. A component of the disposable diaper 10 that constitutes the auxiliary stretchable portion 77 or the like.

At this time, the waist stretch sheet is the front side waist stretch sheet 86 of the disposable disposable diaper, and the rear side waist stretch sheet 85 of the disposable type diaper adjacent to the disposable disposable diaper. Become a state of integration. The both ends of the stretch sheet (the portion which becomes the outer end portion in the product width direction in a state in which the disposable diaper is formed) are held by suction means or the like, and the stretchable sheet is directed to the disposable diaper. The product is stretched in the width direction and attached to a continuous strip of material. Since the stretch sheet is stretched while the both end portions of the stretch sheet are held, the both end portions of the stretch sheet are hardly stretched. The elongation in the product width direction of both end portions of the stretch sheet is lower than the elongation in the product width direction of the region between the both end portions.

Specifically, in the area where the waist-contracting sheet of the disposable diaper is disposed, three zones having different elongations are formed. The center of the width direction of the product in which the waist stretch sheet is disposed is the center area. The product width direction end portion (corresponding to both end portions of the waist elastic sheet) of the region in which the waist stretch sheet is disposed is a side portion, and the region between the center portion and the side portion is an intermediate portion, and the relationship of elongation is Elongation in the product width direction of the central region> Elongation in the product width direction of the intermediate portion> Elongation in the product width direction of the side portion.

The elongation in the width direction of the product in the central region can be made 1.4 to 1.8. The elongation in the product width direction of the side portion is set to be lower than the elongation in the product width direction of the central portion, and can be made 1.0 to 1.1 times. The elongation in the product width direction of the intermediate portion is set to be lower than the elongation in the product width direction of the central portion, and is higher than the elongation in the side portion, and can be made 1.2 to 1.3 times. Further, the side portion has an elongation in the product width direction of 1.0 times, and the side portion may be a region that is substantially not elongated.

Further, the stretchable sheet elongated in the product width direction is shrunk toward the longitudinal direction of the product. In particular, the stretchable sheet has a narrow width in the center in the product width direction. Therefore, in the stretchable sheet in the stretched state, the length in the longitudinal direction of the product in the center in the product width direction is shorter than the length in the longitudinal direction of the product in the product width direction end portion. As shown in Fig. 1, the stretchable sheet to be attached in the state of the neck of the stretchable sheet corresponds to the rear end portion of the front side waist stretch sheet and the rear waist stretch sheet of the product in the longitudinal direction of the stretch sheet. The front end portion has a curved shape in which the center in the width direction is more concave than the outer side in the width direction.

In the leg circumference forming process, the surface sheet 50, the exterior sheet 60, and the back sheet 60a are cut. Thereby, it is formed as an auxiliary expansion joint The front side end portion 77F of the 77 is cut and placed in the thigh opening portion 35 of the wearer's leg.

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

By cutting the continuum according to the size of each product, the stretched state of the waist stretch sheet and the thigh stretch portion of the disposable diaper is released, and is in a natural state. When the stretched state is released, the waist stretch sheet in the state of being stretched at the time of stretching is deformed so as to restore the state before the necking. Therefore, the rear end portion of the rear waist elastic sheet and the front end portion of the front waist stretch sheet are linear in the stretched state, and are deformed into a curved state in a natural state.

Further, when the continuous body is cut to the size of each product, the front end portion of the front waist elastic sheet is contracted more than the rear end portion of the front waist stretch sheet, and the rear side of the rear waist stretch sheet is formed. The end portion is more contracted than the front end portion of the rear waist panel. Since the front end portion of the front waist elastic sheet is farther from the absorbent chip 40a than the rear end portion of the front waist stretch sheet, the rigidity of the absorbent chip 40a is not affected, so that the shrinkage is more. Since the rear end portion of the rear side waist stretch sheet is farther from the absorbent chip 40a than the front end portion of the rear side waist stretch sheet, the rigidity of the absorbent chip 40a is not affected, so that the shrinkage is more.

By the front side end portion of the front side waist stretch sheet, the rear end portion of the front side waist stretch sheet is more contracted, and it becomes a disposable paper. The center of the front end portion of the diaper has a curved shape which is recessed toward the inner side in the longitudinal direction of the product from the outer side in the product width direction of the front end portion of the disposable diaper. Similarly, by the rear end portion of the rear waist elastic sheet, the front end portion of the rear waist panel is more contracted, which becomes the center of the product width direction of the rear end portion of the disposable diaper. The outer side of the rear end portion of the disposable diaper has a curved shape which is recessed toward the inner side in the longitudinal direction of the product.

(3) role. effect

The rear waist elastic sheet 85 overlaps the rear end portion of the absorbent core 40a, and the rear waist stretch sheet 85 is not separated from the absorbent core 40a. For example, if the area between the waist stretch sheet and the absorbent chip 40a is lifted, there is a case where the difference in thickness occurs due to a change in the thickness of the area. However, since a part of the rear waist elastic sheet 85 is overlapped with the rear end of the absorbent core 40a, the thickness can be changed stepwise in the overlapping portion.

Further, a part of the rear waist elastic sheet 85 is overlapped with the waistline holding portion. Therefore, it is possible to suppress the floating of the region between the waist-retaining portion and the waist-contracting sheet or the occurrence of a step difference with respect to the waist-retaining portion or the like.

By gradually reducing the stage difference toward the rear end portion of the disposable diaper, it is possible to suppress the feeling of discomfort to the skin caused by the stage difference. Further, since the thickness of the disposable diaper changes and is gentle, it can be realized like a pant. Disposable diapers can be used to suppress dissatisfaction with the burden on the skin or dissatisfaction of the appearance.

Further, in the disposable diaper of the present embodiment, the thickness (natural state) of the portion where the waist elastic sheet is disposed is about 1.5 mm to 3.0 mm, and the thickness of the portion where the absorbent chip is placed is 3.5 to 4.5 mm. The thickness of the end portion of the product of the disposable diaper (the portion where the back sheet is not disposed) is about 1.0 mm to 2.0 mm.

The front waist elastic sheet 86 is disposed adjacent to the front end portion of the absorbent core 40a, and the region where the thickness of the front waist elastic sheet is thick and the region where the thickness of the absorbent core 40a is increased are adjacent to each other. Therefore, the thickness of the disposable diaper is also changed in the front waist region to achieve a panty-like appearance.

The front side end portion 60aF of the back sheet is located between the front end portion 10F of the disposable diaper and the front end portion of the absorbent chip 40a, and the rear side end portion 60aR of the back sheet is located in the disposable diaper. The rear end portion is between the rear end portion of the absorbent chip 40a. In the region between the absorptive chip 40a and the end portion of the product in the longitudinal direction of the disposable diaper, it is possible to adjust the thickness variation by the presence or absence of the back sheet, and the thickness variation can be made more gentle.

The rear side end portion 86R of the front waist elastic sheet 86 is disposed adjacent to the front end portion of the hook portion, and the front waist panel is not overlapped with the front waist panel and the hook portion, and is disposable. The diaper is contracted in its natural state. On the other hand, the hook portion 95 is an essential part for fixing the fastening tape, and if the portion is contracted, wrinkles are generated, and the engagement (joining) of the fastening tape is insufficient. Again, stick The buckle portion is used in comparison with other sheets (surface sheets, back sheets, etc.) of the general disposable diaper, and a sheet having a high basis weight or a high rigidity is used. Therefore, if the portion of the adhesive label to which the adhesive tape is fixedly adhered is contracted, it is easy to give an impression of the foreign body to the adhesive tape. Therefore, it is preferable to arrange the front side waist elastic sheet and the hook portion without overlapping the front waist elastic sheet and the hook portion.

The surface sheet having the high basis weight portion and the low basis weight portion is disposed in a range from at least the region where the waist-contractable sheet is disposed to the end portion of the product in the longitudinal direction of the disposable diaper. The state of being disposed at least from the region in which the waist-contractable sheet is disposed to the end portion of the product in the longitudinal direction of the disposable diaper is disposed so as to be disposed on the back side waist-contracting sheet and stretched from the rear waistline a state in which the sheet is in the position of the rear end portion of the disposable diaper, and a state in which the front side waist elastic sheet is covered and the front waist end stretched sheet is removed from the front side end portion of the disposable diaper. .

By using a surface sheet having a high basis weight portion and a low basis weight portion, in the state where the waist stretch sheet is contracted, the low basis weight portion is easily contracted, and the low base portion and the high basis weight portion adjacent to each other are close to each other. State. In other words, in the natural state of the disposable diaper, the portion in which the surface sheet is disposed tends to have a higher bulkiness, and it is easy to maintain a soft state while achieving a thickness feeling. As a result, it is possible to prevent a difference in thickness from the end portion of the product in the longitudinal direction of the absorbent body to the end portion of the product in the longitudinal direction of the disposable diaper.

At least one of the surface sheet and the outer sheet is not A non-woven sheet having a hot-melting point embossed using dots or lines, or a non-woven sheet having an area ratio of 5% to 15% of dot or line embossing. The surface sheet and the exterior sheet composed of such a non-woven sheet have a high degree of freedom in a portion where no hot melt is formed and a portion where no embossed portion is formed. Therefore, the portion of the fiber having a higher degree of freedom tends to become bulky in a natural state. As a result, it is possible to prevent a difference in thickness from the end portion of the product in the longitudinal direction of the absorbent body to the end portion of the product in the longitudinal direction of the disposable diaper.

The waist stretch sheet is bonded to the sheet disposed with the waist stretch sheet interposed therebetween by an adhesive, and since the adhesive is intermittently applied, the joint of the sheet is small. In the state where the waist stretch sheet is shrunk, the thickness of the product located at the non-joining portion (the portion where the adhesive is not applied) becomes large, and the flexibility is high.

The thickness of the end portion of the product in the longitudinal direction of the absorbent chip is smaller than the thickness at the center in the longitudinal direction of the product of the absorbent chip. From the lower part of the hip of the disposable diaper toward the end of the product in the longitudinal direction, and then from the end of the product in the longitudinal direction toward the end of the product in the longitudinal direction of the disposable diaper, the thickness is changed. gentle. The user is less likely to feel the difference in the stage of disposable diapers.

(4) Other embodiments

As described above, the present invention is disclosed by the embodiments of the present invention. However, the description and drawings of the disclosure are not to be construed as limiting. According to the disclosure, for the industry, various generations The embodiments, examples, and application techniques are all clear.

In the modified example, the front waist elastic sheet may be disposed to overlap the front end portion of the absorbent chip 40a.

In the modification, the front end portion of the back sheet may extend to the front end portion of the disposable diaper, or may be closer to the rear side than the front end portion of the absorbent chip. In the modification, the rear end portion of the back sheet may extend to the rear end portion of the disposable diaper, or may be closer to the front side than the rear end portion of the absorbent chip.

In the modification, the length in the longitudinal direction of the product in the side portion may be the same as the length in the longitudinal direction of the product in the center region, or may be shorter than the length in the longitudinal direction of the product in the center region.

In the modified example, the rear end portion of the front waist elastic sheet may be overlapped and disposed on the front end portion of the hook portion.

In the modified example, a pattern which can be recognized from the non-skin contact surface side of the disposable diaper may be attached to the back sheet. The pattern can be formed by printing or by any of embossing, heat fusion, and ultrasonic sealing.

The pattern is arranged in an area overlapping the receiving chip. Further, the pattern is not disposed between the front end portion of the disposable diaper and the front end portion of the absorbent chip, and is not disposed at the rear side end of the disposable diaper and the rear side of the absorbent chip. Between the ends. There is no arrangement pattern in a portion that is easily transmitted through the position of the wearer's skin without absorbing the chip at a position close to the waist portion. Therefore, it is possible to give an impression of the waist around the underwear.

In the modified example, the surface sheet may be formed not by the non-woven fabric sheet having a high basis weight portion and a low basis weight portion in the width direction of the above product.

In the modified example, the surface sheet may be formed without using a non-woven sheet having no hot melt point by dot or line embossing, or a non-woven fabric having an area ratio of 5% to 15% without embossing by dots or lines. A thin sheet is formed. Furthermore, the outer sheet may be formed without using a non-woven sheet having no hot melt point by dot or line embossing, or a non-woven fabric having an area ratio of 5% to 15% without embossing by dots or threads. A thin sheet is formed.

In the modified example, the adhesive for joining the waist stretch sheet and the sheet sandwiching the waist stretch sheet may be arranged in a non-intermittent manner.

In the modified example, the thickness of the end portion of the product in the longitudinal direction of the absorbent chip may be the same as the thickness in the center in the longitudinal direction of the product of the absorbent chip, or may be thicker than the thickness in the center in the longitudinal direction of the product of the absorbent chip.

As described above, the present invention naturally includes various embodiments and the like which are not described herein. Therefore, the technical scope of the present invention is limited to the specific matters of the invention related to the scope of the patent claims in accordance with the above description.

The entire contents of the Japanese Patent Application No. 2013-156040 (filed on Jul. 26, 2013) are hereby incorporated by reference in its entirety in the entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire content

[Industrial availability]

Provides a way to suppress dissatisfaction or appearance on the skin Disposable diapers after dissatisfaction.

10R‧‧‧ rear end

40‧‧‧ absorber

85‧‧‧Back waist stretch sheet

85F‧‧‧ front side

85R‧‧‧ rear end

90‧‧‧Buckle belt

Claims (8)

A disposable diaper having a front waist region, a back waist region, a subgluteal region between the front waist region and the back waist region, and a front waist region from the front waist region An extended body product longitudinal direction, a product width direction orthogonal to the longitudinal direction of the product, and an absorber having an absorbent chip extending over at least one of the front waist region and the back waist region And an outer end portion disposed in the width direction of the rear waist region and fixedly adhered to one of the front waist region and the center of the width direction of the product, and the product width width of the disposable diaper a waist-elastic stretch sheet having a stretchable direction, and extending in a product width direction in the front waist region and the rear waist region, and holding the disposable diaper in a waist circumference holding portion of the wearer's body; A disposable diaper characterized in that the waist elastic sheet has a rear side waist elastic sheet disposed at a rear end portion of the rear waist region, and a front side waist stretch sheet of the front waist portion of the front waist region, and a part of the rear waist stretch sheet is disposed to overlap the rear end portion of the absorbent chip, and is disposed to overlap the waist holding portion, The front waist elastic sheet is disposed adjacent to the front end of the absorbent chip. The disposable diaper according to claim 1, further comprising: a liquid-impermeable back sheet disposed on the non-skin contact surface side of the absorbent body, and a front side end of the back sheet Between the front end portion of the disposable diaper and the front end portion of the absorbent chip, the rear end portion of the back sheet is located at the rear end of the disposable diaper. The portion is between the rear end portion of the above absorbent chip. The disposable diaper according to claim 2, wherein the back sheet is provided with a pattern recognizable from a non-skin abutting side of the disposable diaper, wherein the pattern is Arranging in a region overlapping the absorbent chip, and not disposed between the front end portion of the disposable diaper and the front end portion of the absorbent chip, and the rear side of the disposable diaper The end portion is between the rear end portion of the above absorbent chip. The disposable diaper according to any one of claims 1 to 3, wherein in the front waist region, a portion for fixing the adhesive tape to the fastening tape is disposed, the front waist circumference The rear end portion of the stretch sheet is disposed adjacent to the front end portion of the hook portion. The disposable diaper according to any one of claims 1 to 4, further comprising a surface sheet disposed on a surface of the skin contact side of the disposable diaper, the surface The sheet is disposed at least in a long side of the product from the region where the waist stretch sheet is disposed to the disposable diaper. In the range up to the end portion, the surface sheet is configured by interchanging non-woven sheets having a high basis weight portion and a low basis weight portion in the width direction of the product. The disposable diaper according to any one of claims 1 to 4, further comprising a sheet disposed on a surface of the non-skin abutting side of the disposable diaper. And a surface sheet disposed on a surface of the skin contact side of the disposable diaper, wherein at least one of the surface sheet and the exterior sheet is formed by not having a dot or a line embossing The non-woven sheet of the hot-melt point or the non-woven sheet having an area ratio of 5% to 15% by dot or line embossing, and the one of the surface sheet and the outer sheet is at least arranged in: The range from the region in which the above-described waist elastic sheet is disposed to the end portion of the product in the longitudinal direction of the disposable diaper. The disposable diaper according to any one of claims 1 to 6, wherein the waist stretch sheet is joined by an adhesive to: a sheet disposed with the waist stretch sheet interposed therebetween The above adhesive is applied intermittently. The disposable diaper according to any one of claims 1 to 7, wherein the thickness of the end portion of the product in the longitudinal direction of the absorbent chip is higher than that of the absorbent chip. The thickness in the center of the long side is also thin.