TWI594740B - Method of making disposable disposable diapers and disposable diapers - Google Patents

Description

Disposable disposable diaper and disposable disposable diaper manufacturing method

The present invention relates to a method of manufacturing disposable disposable diapers and disposable disposable diapers.

Conventionally, a front waist region, a rear waist region, and a crotch region are formed, and a pair of foot opening portions are formed, and an absorber that extends across the crotch region to the front waist region and the rear waist region is stretched toward the product length. A disposable diaper that is disposed along the foot opening is well known.

The leg stretch portion of the disposable diaper of Patent Document 1 is composed of a mesh material composed of a stretchable material such as a rubber or an elastic body, a stretch film, or a stretch nonwoven fabric. The web structure has a predetermined length in the width direction of the product and can be stretched over the entire range. Therefore, the opening portion of the foot of the disposable disposable diaper is arranged in a planar shape along the circumference of the wearer.

[prior technical literature] [Patent Document]

Patent Document 1: Japanese Patent Publication No. 2004-505725 (Fig. 4, Fig. 7, paragraph 0102, paragraph 0017)

However, the disposable disposable diaper described above has the following problems.

In the leg stretchable portion, the stretchable web member is bonded to a non-stretchable sheet material (a sheet material constituting a surface sheet or a back sheet), and the non-stretchable sheet material is also shrunk by shrinkage of the web member. Therefore, wrinkles are formed in the non-shrinkable sheet material, and the skin is stimulated by wrinkles.

Moreover, since the leg expansion-contraction part of the patent document 1 consists of the mesh material which has predetermined length in the width direction of a product, it is a larger area compared with the foot expansion-contraction part which consists of a linear elastic member. The non-stretchable sheet shrinks. Therefore, compared with the linear elastic member, the wrinkles formed in the non-stretchable sheet material become large, or the wrinkles become large, and the stimulation of the wearer's skin becomes strong.

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 which can be placed in a planar shape along the wearer's foot circumference and which can suppress irritation to the skin. A method of manufacturing a disposable disposable diaper.

The disposable disposable diaper (the disposable disposable diaper 10) of the present invention has a front waistline region (front waistline region 20), a rear waistline region (rear waist region 30), and the front waistline region and the foregoing The crotch region (the crotch region 25) between the rear waist regions further has a product longitudinal direction (product longitudinal direction L) from the front waistline region toward the rear waist region; and a product width orthogonal to the longitudinal direction of the article a direction (product width direction W), and an absorber (absorbent body 40) extending across the crotch region and extending from the crotch region toward at least one of the front waist region and the rear waist region; a foot expansion portion (a leg expansion portion 75) that is disposed closer to the outer periphery in the product width direction than the absorber and that is stretchable along the longitudinal direction of the product, and is characterized in that the foot opening portion and the aforementioned The leg expansion and contraction portion extends outward in the product width direction from the crotch region toward the outer side in the longitudinal direction of the product, and the leg expansion and contraction portion is provided to have a predetermined length in the product width direction. a belt-shaped first leg stretch material (the first leg stretch material 76); and a first stretch material arrangement region in which the first leg stretch material is disposed, and the product width is larger than the first leg stretch material The second leg-long stretchable material (the second leg stretchable material 77) having a short length in the direction is provided at a position closer to the skin contact surface side than the first leg stretchable material and the second leg stretchable material. a non-stretchable sheet material (side flap 70) joined to the first leg stretch material and/or the second leg stretch material, The elongation of the product of the second leg stretchable material in the longitudinal direction is higher than the elongation of the first leg stretchable material in the longitudinal direction of the product.

Moreover, the method for producing a disposable disposable diaper according to the present invention is a net that is transported in a continuous state after the components of the disposable disposable diaper are configured, and the attachment structure is disposed along the opening of the foot circumference. The method for producing an absorbent article according to the first leg expansion material and the second leg expansion material of the leg expansion and contraction, characterized in that the first leg extension material in a continuous belt shape and the second leg extension material in a continuous line shape are provided. a transfer process in which the first leg stretch material and the second leg stretch material are brought together in a state in which the first leg stretch material and the second leg stretch material are brought together in a conveyance direction; a swinging process in which the first leg stretch material and the second leg stretch material are conveyed while being displaced in a direction orthogonal to the conveyance direction, and the first leg stretch material and the second leg stretch are cut by the length of the product. And a cutting process for adhering the cut first leg stretch material and the second leg stretch material to the net, wherein the transport process is to extend the second leg stretch material in a transport direction And the aforementioned second foot extension When the elongation of the shrinkage material is higher than the elongation of the first leg stretch material, the first leg stretch material and the second leg stretch material are conveyed.

10‧‧‧Disposable disposable diapers

20‧‧‧ Front waist area

25‧‧‧胯下区域区

30‧‧‧After waist area

35‧‧‧foot opening

40‧‧‧ absorber

40a‧‧‧Absorbent core

40b‧‧‧ core material cladding

50‧‧‧ top sheet

60‧‧‧Outer sheets

60a‧‧‧back sheet

70‧‧‧Fringe

71‧‧‧Flexible components

75‧‧‧foot expansion

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

The inner end region of the width direction of the 75I‧‧‧ foot expansion joint

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

76‧‧‧1st leg expansion material

77‧‧‧2nd foot expansion material

80‧‧‧foot folds

81‧‧‧ joint part

81A‧‧‧1st joint

81B‧‧‧2nd joint

82‧‧‧Free end section

84‧‧‧Contraction

85‧‧‧Waist expansion and contraction

90‧‧‧ buckle

95‧‧‧ Target Department

115‧‧‧ gap

125‧‧‧ gap

200‧‧‧ Pants Department

200a‧‧‧Under the expansion and contraction department

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 embodiment.

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

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

Fig. 5 is a side view showing the apparatus for manufacturing an absorbent article according to the embodiment.

Next, an embodiment of the disposable disposable diaper according to the present invention will be described with reference to the drawings. In the following description, the same or similar reference numerals are given to the same or similar parts. However, the figure is a schematic display, please note that the ratio of each size will be different from the real thing.

Therefore, the specific dimensions and the like should be judged by referring to the following description. Further, each of the drawings may include a difference in the relationship between the dimensions and the ratio of the dimensions.

(1) The overall schematic structure of disposable disposable diapers

Fig. 1 and Fig. 2 are plan views showing the disposable disposable diaper 10 of the present embodiment. Figure 3 is taken along the line F1-F1 shown in Figure 1 A cross-sectional view of the disposable diaper 10. In addition, the unfolded plan view shown in FIG. 1 is such that the top surface sheet 50 of the disposable diaper 10, the side flaps 70, and the like are not wrinkled, and the leg stretch portion 75 and the foot side gathers 80 are formed. The state of the extended state is shown, but the state in which the foot side wrinkle 80 is expanded and contracted is shown for convenience of description.

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 underarm region 25 is located between the front waistline region 20 and the rear waistline region 30. Further, the disposable disposable diaper 10 is formed with a pair of foot opening portions 35 (see Fig. 4). The foot opening portion 35 is provided at the side end portion of the product disposable diaper in the width direction of the disposable diaper, and is worn along the wearer's foot in a state where the disposable diaper is worn by the wearer. Part of the configuration.

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 includes an absorber 40 that extends across the crotch region 25 and extends from at least the underarm region toward at least one of the front waist region 20 and the rear waist region 30. The absorber 40 is composed of an absorbent core 40a and a core wrap layer 40b.

The absorbent core material 40a can be suitably configured using a conventional member such as pulverized pulp or a high-absorbent polymer, or the like, in the same manner as the disposable disposable diaper. The absorbent core material 40a is wrapped around the clad layer 40b by a sheet-like core material. The core wrapping layer 40b is a sheet covering the absorbent core 40a. A part of at least the skin surface side of the core wrapping layer 40b is composed of various fiber nonwoven fabrics or tissue sheets having liquid permeability. For example, a mass of about 10 ~ 30g / m ² of a hot air non-woven fibers, spunbond nonwoven fabric, SMS (spunbonded - melt-blown - spunbond) nonwoven fabric, or a mass of about 10 ~ 30g / m ² sheet of tissue.

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

The side flaps 70 are provided in the side edge part of the absorber 40 in the product width direction W, respectively. The side panel 70 is composed of one sheet or a nonwoven fabric in which a plurality of sheets or more are stacked. Further, each of the pair of side panels 70 is provided with a buckle 90.

The buckle 90 is attached to the rear waistline region 30 and extends along the product width direction W. The disposable disposable diaper 10 is held by the wearer's body by fixing the non-skin contact surface of the front waistline region 20. on.

In the present embodiment, the front waistline region 20, the rear waistline region 30, and the buckle 90 constitute a waistline holding portion. The waistline holding portion of the rear waist region 20 is a range extending from the region where the engaging portion of the buckle 90 is provided in the width direction. The waistline holding portion of the front waistline region 30 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 expansion-contraction portion 200a formed in the crotch region 25 and capable of expanding and contracting in the longitudinal direction L of the product. Specifically, the underarm constriction portion 200a is disposed under the armpit The crotch portion 200 of the region 25. The configuration of the crotch portion 200 and the underarm elastic portion 200a will be described in detail later.

The surface side (the top sheet 50 side) of the absorber 40 is provided with a pair of leg expansion and contraction portions 75 that are formed around the foot opening portion 35 and that can be expanded and contracted in the product longitudinal direction L.

The leg expansion and contraction portion 75 is longer in the product longitudinal direction L than the crotch expansion-contraction portion 200a, and is provided at a position outside the crotch expansion-contraction portion 200a in the product width direction W. The structure of the leg expansion and contraction portion 75 will be described in detail later.

Further, the inside of the pair of leg expansion and contraction portions 75 (the center position in the product width direction W) is provided with one of the pair of leg side gathers 80 extending in the longitudinal direction L of the product. The leg side wrinkles 80 are provided on the inner end portion of the side panel 70 in the product width direction, and are disposed in the upright stretch wrinkles closer to the inner side in the product width direction than the leg stretch portion. The leg gathers 80 are disposed closer to the inner side in the product width direction than the leg stretch portion 75 and function as a foot side stretchable portion.

The side panel 70 is folded back toward the surface sheet side at the inner end portion in the product width direction, and is laminated in two layers. Between the two side flaps 70, the elastic member 71 (see Fig. 3) is provided in a state of being elongated in the longitudinal direction. The side flaps 70 and the elastic members 71 form the foot side gathers 80.

The unfolded plan view of the disposable disposable diaper shown in Fig. 1 shows a state in which the elastic member 71 of the back side wrinkle 80 is contracted, and the unfolded plan view of the disposable disposable diaper shown in Fig. 2 shows the side wrinkles. Pleated 80 The state in which the elastic member 71 is elongated.

The leg side wrinkles 80 have a joint portion 81 joined to the top sheet 50 or the back sheet 60a, and a free end portion 82 in which the elastic member is disposed. In the free end portion 82, the central portion in the longitudinal direction including the crotch region 25 is contracted toward the longitudinal direction of the product by the elastic member 71 to constitute the constricted portion 84. The foot side wrinkles 80 are erected with the joint portion 81 as a base end portion when worn, and the contracted portion 84 of the free end portion 82 is used as a apex portion to come into contact with the wearer's skin. That is, the joint portion is a base end portion where the foot side stretchable portion stands up.

In addition, the constricted portion 84 is a portion that can be substantially contracted in the longitudinal direction of the product by the elastic member 71, and the portion in which the elastic member 71 is disposed in a state where the contraction force is not exerted is removed. Further, in Fig. 2, the joint portion 81 to which the side panel 70 and the top sheet 50 are joined is indicated by oblique lines on the side of the leg.

A plurality of the joint portions 81 are provided, and the first joint portion 81A is disposed closer to the outer side in the longitudinal direction of the product than the contraction portion 84, and the second joint portion 81B is disposed closer to the outer side in the width direction of the product than the contraction portion 84. . Therefore, the foot wrinkles 80 are configured such that the central portion of the crotch region 25 in the longitudinal direction of the product stands up toward the wearer side.

In the joint portion 81 of the leg gathers 80, the second joint portion 81B disposed closer to the outer side in the product width direction than the contraction portion 84 is disposed in the product width direction W, and is disposed in the underarm elastic portion 200a and the foot stretch portion 75. between. The second joint portion 81B is the full length in the longitudinal direction of the product The range is joined to the back sheet 60a. 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 gathers 80, the first joint portion 81A disposed closer to the outer side in the longitudinal direction of the product than the contraction portion 84 is joined to the top sheet 50.

Further, the joint portion 81 of the foot side gathers 80 can adopt various structures. The engaging portion may be, for example, extending from the lower portion toward the front waist region and the rear waist region in the longitudinal direction of the product, and the portion joined to the top sheet may be closer to the outer side in the width direction than the absorbent core 40a. The portion joined to the liquid-impermeable back sheet, the outer sheet, or the like is formed as a base end portion that stands up.

Further, the leg gathers may be disposed on the inner side in the product width direction of the leg stretch portion, and the structure is not limited to the above configuration, and a conventionally known foot wrinkle structure may be employed.

Further, a waist elastic-contracting portion 85 that can expand and contract in the width direction of the product is provided between one of the fastener belts in the product width direction. The waist elastic-contraction portion 85 is disposed between the pair of buckles in a plane view angle, and contracts the buckles in the width direction. The waist elastic-contraction portion 85 is disposed on the surface of the top sheet of the skin contact side, and contracts the belt between the buckles in the width direction.

In the present embodiment, the waist elastic-contraction portion 85 is formed of a stretchable sheet. The member constituting the waist elastic-contraction portion 85 is not particularly limited, but a member which is as thin as possible and has low bending rigidity and a small shrinkage ratio is preferably used. In the present embodiment, a stretchable film having a basis weight of 20 to 45 g/m ² is used as the waist stretchable portion 85.

The waist elastic-contraction portion 85 is attached to the exterior sheet 60 by a hot-melt adhesive or a heat treatment or the like after being extended to 1.5 to 2.5 times the length of the non-elongated state (natural state).

In the present embodiment, the waist elastic-contraction portion 85 is disposed between the exterior sheet 60 and the back sheet 60a. However, the core stretchable portion 85 may be disposed on the core wrap layer 40b and the back sheet 60a or the outer sheet 60 in a structure in which the core wrapping layer 40b extends to the outer side in the longitudinal direction of the product more than the absorbent core member 40a. between. The position of the waist elasticized portion is not particularly limited, but is preferably disposed closer to the non-skin contact surface side than the absorbent body 40. Further, the region in which the absorber is not disposed may be disposed between the side panel 70 and the back sheet 60a or the exterior sheet 60.

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

(2) Foot expansion and contraction

Next, the foot expansion and contraction portion 75 will be described in detail. The leg expansion and contraction portion 75 is configured to be disposed along the foot opening portion 35 provided on the outer side in the product width direction from the absorber 40, and is stretchable in the longitudinal direction L of the product. The foot opening portion 35 and the leg expansion portion 75 have a width direction inner end region 75I located at the innermost side of the crotch region in the width direction, and extend outward in the product width direction from the crotch region 25 toward the outer side in the longitudinal direction of the product. . Further, the inner end region 75I in the width direction of the leg stretch portion 75 can be continuously matched It may be placed in the length direction of the product or may not be continuous in the length direction of the product.

The leg-shaped stretchable portion 75 of the present embodiment includes a belt-shaped first leg stretchable material 76 having a predetermined length in the product width direction, and a linear shape having a shorter length in the product width direction than the first leg stretchable material 76. Foot stretch material 77.

The first leg stretch material 76 is formed of a stretchable sheet. For example, as the stretchable sheet, a stretchable film in which a thermoplastic elastomer such as urethane or styrene is melted into a film shape, a stretchable nonwoven fabric composed of stretchable fibers, or a stretchable stretch can be used. A composite film such as a non-stretchable sheet which is partially cut or fragile is adhered to a film or a stretchable nonwoven fabric.

Moreover, in place of the stretchable sheet, the first leg stretchable material 76 is configured by arranging a belt-shaped elastic member made of polyurethane elastic fiber or natural rubber.

The first leg stretch material 76 is disposed between the side panel 70 and the exterior sheet 60. Alternatively, the first leg stretch material 76 is disposed between the back sheet 60a and the side flaps 70 in a region including the back sheet 60a disposed between the absorber 40 and the exterior sheet 60.

The stretchable sheet constituting the first leg stretchable material 76 is at least 45 mm in width (the width in the product width direction W of the natural state of the discarded disposable diaper 10) at least 45 mm in the crotch region 25, and is preferably 12.5 mm or more. 35mm or less. In the case of less than 5 mm, the surface is substantially along the wearer's foot circumference, causing the part to be unable to concentrate the tightening force, and the effect of reducing the load on the skin based on the elastic element cannot be reduced. At 45 mm, the length of the product in the width direction of the disposable disposable diaper becomes too wide, and the stretchable sheet is easily caught or turned up toward the wearer's body side.

The expansion ratio of the first leg stretchable material 76 is preferably 1.4 to 2.2 times. In the present embodiment, the expansion ratio of the first leg stretchable material 76 is set to 1.7 times. In addition, the elongation is the degree of elongation of the first leg stretch material 76 or the second leg stretch material 77, as defined in the following manner.

The elongation of the first leg stretch material = (the length of the first leg stretch material in the extended state) ÷ (the length of the first leg stretch material in the natural state), or the elongation of the second leg stretch material = (the first state of the stretched state) The length of the two-legged stretchable material is ÷ (the length of the second-foot stretchable material in the natural state), or in addition, in the present specification, the elongation is measured, for example, in the following manner.

First, in the case where the disposable disposable diaper 10 is sealed in a package or the like after use, the disposable disposable diaper 10 is taken out from the package. Next, the arrangement area of the first leg stretch material is cut out. At this time, the non-stretchable sheet joined to the first leg stretch material is also cut out together. Further, the second leg stretchable material is cut out along the second leg stretchable material at a position of 0.5 to 1.0 mm on the outer side in the product width direction. The elongation of the sample of the first leg stretched material after the cut was measured, and the elongation of the first leg stretched material was measured. Further, the elongation of the sample including the cut second leg stretched material was measured, and the elongation of the second leg stretched material was measured.

Each sample was placed in an environment of 20 ° C ± 2 ° C and a relative humidity of 60% ± 5% RH for 60 minutes, and the measurement was performed along the direction of expansion and contraction. The length of the 1st leg stretch material and the 2nd leg stretch material. This length is taken as [the length of the first leg stretch material in the natural state] and [the length of the second leg stretch material in the natural state].

Secondly, the length of the stretched direction of the desired region in the state (that is, the natural state) and the desired region when the wrinkle caused by the elastic member is not visually recognized on the non-stretchable sheet are measured from the natural state. The length of the telescopic direction. This length is referred to as [the length of the first leg stretchable material in the extended state] and [the length of the second leg stretchable material in the extended state].

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

Moreover, the interval between the inner ends of the right and left pair of leg extending portions 75 in the product width direction W is widened toward the front waistline region 20 from the crotch region 25, and becomes wider toward the rear waistline region 30 from the crotch region 25. When the disposable diaper is worn on the wearer's body, the foot stretchable portion can be placed so that the front and rear waists are widened in the lower part of the crotch, so that the leg stretchable portion can be along the body line, and the foot stretchable portion can be ideal. The ground extension is placed around the wearer's foot.

Further, the interval (D1 in the drawing) of the end portions of the front waistline region 20 of the pair of left and right leg stretchable portions 75 is the interval between the ends of the rear waistline region 30 of the pair of right and left leg stretchable portions 75 (D2 in the drawing) )narrow. In addition, the interval is such that the disposable diaper 10 is stretched from the natural state to the product longitudinal direction L and the product width direction W to maintain a state in which wrinkles are not formed. Product width direction The distance between the inner ends of W.

The extension of the skin surface of the wearer's body is particularly large at the buttocks, and is particularly prominent at the outer side in the width direction. Further, the leg expansion and contraction portion 75 is in close contact with the wearer's body. Therefore, by creating D2>D1, even if the wearer's motion is applied to the disposable disposable diaper 10, it can be extended in a state where the buttocks-side mid-foot stretchable portion 75 is in close contact, even if the change is extended. When the amount is large, the leg expansion portion 75 does not protrude. Therefore, the offset of the disposable disposable diaper 10 based on the use of the foot stretch portion 75 can be suppressed.

The second leg stretchable material 77 is disposed in the first stretchable material arrangement region in which the first leg stretch material is disposed, and is placed on the first leg stretchable material 76 in a superposed manner. The second leg stretch material is disposed along the inner end portion in the width direction of the first leg stretch material 76.

The second leg stretch material 77 is composed of a linear elastic member. For example, an elastic member of a thickness of 340 to 940 dtex can be used. Further, the elongation of the second leg stretchable material 77 is configured to be higher than the elongation of the first leg stretchable material 76. Specifically, the elongation of the second leg stretchable material 77 is preferably 1.7 to 2.5 times. In the present embodiment, the expansion ratio of the second leg stretchable material 77 is set to 2.2 times.

The second leg stretch material 77 is disposed between the first leg stretch material 76 and the exterior sheet 60. Further, when the exterior sheet 60 is not provided, it may be disposed between the first leg stretchable material 76 and the back sheet 60a.

In addition, the second leg stretchable material 77 of the present embodiment is disposed on the non-skin contact surface side of the first leg stretchable material 76, but the second leg stretchable material 77 of the present invention may be disposed on the first leg stretchable material 76. Skin contact surface side. In the state in which the second leg stretchable material 77 is disposed on the skin contact surface side of the first leg stretch material 76, the side sheet which is the non-stretchable sheet material is disposed on the first leg stretchable material 76 and the second leg stretchable material 77. Skin abuts the side of the face.

In addition, the state in which the non-skin contact surface side of the first leg stretchable material 76 is disposed includes not only the state in which the non-skin contact surface of the first leg stretchable material 76 is in contact with but also the first leg stretch material 76. The concept of the state in which the first leg elastic material 76 is indirectly disposed on the non-skin contact surface side. In addition, the state in which the skin contact surface side of the first leg stretchable material 76 is disposed includes not only the state in which the skin contact surface of the first leg stretchable material 76 is in contact with but also the skin of the first leg stretch material 76. The concept of the state in which the first leg stretchable material 76 is indirectly disposed on the contact surface side.

However, when the second leg stretch material is placed on the skin contact surface side of the first leg stretch material, the portion which is contracted by the second leg stretch material is likely to come into contact with the skin, and the skin is stimulated and strengthened. . Therefore, it is preferable to arrange the second leg stretch material on the non-skin contact surface side of the first leg stretch material, and according to this configuration, it is possible to prevent the portion stretched by the second leg stretch material from directly coming into contact with the skin.

In addition, the first leg stretch material 76 is disposed on the skin contact surface side, and the second leg stretch material 77 is disposed on the non-skin contact surface side, and the first leg stretch material 76 and the non-stretch sheet are mutually The bonding pattern is a discontinuous and intermittent bonding pattern (for example, a coating pattern in which a non-existing portion of the adhesive is coexisted with a portion where the adhesive is present by spiral coating or the like), and the second leg stretchable material is a continuous bonding pattern (for example, a slit coating on a rubber thread, a portion in which a rubber wire is present) It is more preferable to form a continuous coating pattern in which the presence of such an adhesive is applied in a granular form.

In this way, the touch feeling on the skin contact surface side can be made softer, and the stimulation of the skin can be alleviated, and the linear second-foot stretchable material on the non-skin contact surface side is continuous with the first leg stretchable material. Since the sheet is joined, the wrinkles caused by the second leg stretchable material can be reduced, and the irritation to the skin can be alleviated.

In addition, the leg stretchable portion 75 is a portion that can be stretched and contracted in the longitudinal direction of the product by a stretchable sheet or the like, and the portion in which the stretchable sheet is disposed in a state where the contraction force is not exerted is removed.

Fig. 4 is a view schematically showing a state in which the disposable disposable diaper of the embodiment is worn, as viewed from the front of the wearer. As shown in Fig. 4, the foot opening portion of the disposable disposable diaper is disposed along the foot circumference by the leg expansion portion 75. In this case, since the first leg stretchable material has a belt shape, the foot opening portion 35 of the disposable disposable diaper can be placed in a planar shape on the wearer's foot circumference.

In addition, since the linear second leg elastic material 77 having a shorter width than the first leg elastic material 76 is disposed, the elongation of the second leg elastic material 77 is higher than the elongation of the first leg elastic material 76, so that it is possible to The non-stretchable side panels 70 are contracted by the second leg stretch members 77. However, since the elongation of the first leg stretchable material 76 having a large contact area with the skin is low, it is possible to suppress the wrinkles of the entire leg stretchable portion 75 in the first stretchable material arrangement region.

By providing the first leg stretch material and the second leg stretch material, the non-stretch side sheet can be partially collected by the second leg stretch material 77. The entire leg expansion/contraction portion 75 is wrinkled, and the entire first leg expansion and contraction member 76 can be disposed in a planar shape along the wearer's foot circumference.

In addition, since the second leg stretch material is disposed along the inner end portion of the first leg stretch material in the product width direction, it is possible to suppress the product width direction of the first leg stretch material which is in close contact with the wearer's foot. The outer end portion is excessively adhered to reduce the irritation to the skin caused by the opening of the foot.

In order to reduce the irritation of the skin around the opening of the foot, it is desirable that the second leg stretchable material is disposed closer to the inner side in the product width direction than the center of the product width direction of the first leg stretchable material. Since the most contracted portion of the leg stretch portion is closer to the inner side in the width direction than the center in the width direction of the leg stretch portion 75, the inner end portion of the leg stretch portion 75 in the product width direction is the product width direction of the leg stretch portion 75. The outer end is more strongly contracted.

Since the portion of the first leg stretch material in the product width direction close to the outer end portion is in close contact with the wearer's foot portion than the portion near the inner end portion, the second leg stretch material is disposed on the end portion. The portion near the inner end portion can suppress the occurrence of abutment of the skin opening portion to the skin.

Thereby, the portion closer to the outer side in the width direction than the second leg stretchable material 77 can match the wearer with the second leg stretchable material 77 as a starting point. By widening the portion of the first leg stretcher 76 in the width direction of the product, it is possible to maintain the length (width) of the leg stretch portion 75 in the width direction of the product, and to more closely contact the wearer's foot. In the state of the circumference, the fit of the leg expansion and contraction portion 75 to the wearer can be improved.

The inner end portion of the first leg stretch material in the product width direction is disposed in parallel with the outer end portion of the first leg stretch material in the product width direction, and the length of the first leg stretch material in the product width direction is slightly constant. When the length of the first leg stretch material in the product width direction is not constant, the contraction force of the wearer's foot cannot be made constant, and the stress is concentrated locally. However, since the length of the first leg stretch material in the product width direction is constant, the leg stretch portion 75 can be disposed so as to be in contact with the wearer's foot in the same region.

The end portion of the second leg stretchable material in the longitudinal direction of the product is disposed closer to the inner side in the longitudinal direction of the product than the end portion of the first leg stretchable material in the longitudinal direction of the product. The end portion of the first leg stretch material in the product longitudinal direction and the end portion of the second leg stretch material in the longitudinal direction of the product are each a part of the contraction base point, and the thickness of the portion becomes larger than the adjacent non-elastic portion. When worn, a gap is created between the wearer's foot and the wearer's foot. When the end portion of the first leg stretch material in the longitudinal direction of the product coincides with the end portion of the second leg stretch material in the longitudinal direction of the product, the shrinkage of the portion becomes strong, and the thickness difference between the non-elastic portion and the stretch portion is changed. A bigger one is produced.

In order to eliminate such a defect, it is desirable to displace the end portion of the first leg stretch material in the longitudinal direction of the product and the end portion of the second leg stretch material in the longitudinal direction of the product, and to extend the second leg elastic material having a high elongation. It is disposed on the inner side in the longitudinal direction and can be contracted stepwise to suppress wrinkles caused by local shrinkage.

A non-stretchable back sheet 60a and an exterior sheet 60 are laminated on the non-skin contact surface side of the leg stretch portion. Article of the outer sheet 60 The outer end portion in the width direction is disposed along the foot opening portion, and the entire length of the leg stretch portion overlaps the outer sheet 60 in the thickness direction. In addition, the outer end portion of the back sheet 60a in the product width direction is linear along the longitudinal direction of the product, and a part of the leg stretch portion overlaps the back sheet 60a in the thickness direction.

Since the front waistline region is located on the inner side in the width direction than the rear waistline region, the region in which the front waistline region overlaps with the back sheet 60a becomes wider than the back waistline region side.

Further, the leg stretchable portion 75 is disposed closer to the outer side in the width direction of the product than the second joint portion 81B which is wrinkled on the leg side. The leg gathers are configured such that the second joint portion 81B serves as a base point, and the contraction portion 84 on the inner side in the width direction rises toward the wearer side than the second joint portion 81B.

For example, when the leg expansion/contraction portion 75 is disposed closer to the inner side in the width direction than the second engagement portion 81B, the second engagement portion 81B is raised from the second extension portion 81B in the width direction inner side by the leg expansion/contraction portion 75, and the constricted portion 84 faces It occurs when the outside of the width direction stands up. When the constricted portion 84 stands up to the outside in the width direction, the body fluid leaks to the outside in the width direction. However, since the leg stretch portion 75 is disposed closer to the outer side in the width direction than the second joint portion 81B, the stretchable portion 84 easily stands up toward the wearer side.

(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 underarm elastic portion 200a. The underarm expansion and contraction portion 200a is configured as When the disposable disposable diaper is worn, the portion of the underarm region can maintain a flat shape compared to other portions of the absorbent body 40. The crotch portion 200 has a crotch expansion-contraction portion 200a that can expand and contract at least in the product longitudinal direction L or the product width direction W.

The armature expansion-contraction part 200a and the foot expansion-contraction part 75 are separately provided separately, and are comprised so that it may overlap with the absorptive core material 40a (The core material wrapping layer 40b and the back surface which enclose the absorptive core material 40a in this embodiment. The position between the sheets 60a shrinks 60% or more of the length of the absorbent core material 40a in the width direction. As described above, the portion in which the absorbent core member 40a is disposed is contracted by the underarm elastic portion 200a, so that the absorbent core member 40a is contracted, and the flat shape is easily maintained compared to the portion where the absorbent core member 40a is not contracted.

In addition, since the absorbent core member 40a located in the waist region and the back waist region before being positioned closer to the outer side in the longitudinal direction of the product than the underarm elastic portion 200a is not contracted by the underarm elastic portion 200a, The crotch portion 200 that is held in the waist and the waist of the wearer in a flat shape and maintained in the crotch portion of the disposable diaper in a flat shape is not excessively adhered to the body, and as a result, the crotch portion 200 can be appropriately moderately Configure along the body.

Moreover, 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 can be worn by the wearer when worn. The lower part of the jaw forms a flat underarm area along the body. Since the front waist region and the rear waist region stand up from the underarm elastic portion 200a, the disposable type can be improved. The fit of the disposable diaper 10 to the wearer.

It is preferable that the underarm elasticizing portion 200a is constituted by a stretchable sheet. By forming the underarm stretchable portion 200a with the stretchable sheet, the absorbent core member 40a in the region in which the stretchable sheet is disposed is contracted in the same manner, and it is easier to maintain a flat shape. Further, the stretchable sheet may be configured, for example, in the same stretchable sheet as the leg stretch portion 75.

Further, in place of the stretchable sheet, a plurality of linear elastic members, such as polyurethane elastic fibers and natural rubber, are disposed to constitute the underarm elastic portion 200a. In this case, in order to shrink the absorbent core material 40a in the same manner by the underarm elasticizing portion 200a, the interval between the elastic members is set to be 7 mm or less, and more preferably 5 mm or less. Moreover, in order to shrink the absorptive core material 40a similarly, it is desirable to make the difference of the space|interval of the adjacent elastic member into 2 mm or less.

Further, the elongation of the underarm elastic portion 200a is preferably 1.2 times or more and 1.8 times or less. In the present embodiment, the elongation of the underarm elastic portion 200a is set to 1.4 times. The elongation means the degree of elongation of the expansion and contraction direction (the product longitudinal direction L) of the underarm elastic portion 200a, and is defined as follows.

The elongation means the degree of elongation of the elastically stretchable portion 200a in the direction of expansion and contraction (in the longitudinal direction L of the product in the present embodiment), and is defined as follows.

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

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

First, in the case where the disposable disposable diaper 10 is packaged in a package or the like, the disposable disposable diaper 10 is taken out from the sealed package, in this state at 20 ° C ± 2 ° C, relative humidity 60% ± 5%. The RH was placed in an environment for 60 minutes, and the length of the underarm elastic portion was measured along the stretching direction. This length is set to [the length of the expansion and contraction direction of the elastically stretchable portion 200a in the natural state].

Secondly, the length of the expansion and contraction direction of the desired region in the state (that is, the natural state) and the length of the expansion and contraction direction of the desired region when the wrinkles based on the elastic member are not visually recognized are measured. This length is set to [the length of the expansion and contraction direction of the underarm elasticizing portion 200a in the maximum stretch state].

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

As described above, by setting the elongation of the underarm elastic portion 200a to 1.2 times or more and 1.8 times or less, it is possible to ideally follow the stretching of the wearer's skin.

For example, when the wearer makes a forward flexion posture in which the front side of the body is contracted, the skin on the buttock side of the wearer has a portion extending about 30% of the state of the extended body.

In other words, when the elongation of the underarm/elastic expansion portion 200a is 1.2 times or less, the expansion and contraction of the underarm elastic portion 200a in the natural state is insufficient, and the use of the underarm expansion/contraction portion 200a is not performed. The shrinkage of the absorbent body region of the crotch portion of the disposable disposable diaper 10 is small, in the wearer's In the lower part of the crotch, it is not sufficient to obtain a flat shape along the body.

In addition, when the elongation of the underarm elastic-contraction portion 200a is made larger than 1.8 times, the contraction size of the crotch expansion-contraction portion 200a in the expansion and contraction direction is excessively large, so that the region in which the underarm constriction portion 200a exists is likely to become In a state in which the body is more closely attached, the disposable disposable diaper 10 is easily displaced toward the lower side of the wearer.

Further, the center of the crotch expansion-contraction portion 200a in the longitudinal direction L of the product is disposed closer to the front waistline region 20 than the center of the disposable diaper 10 after being used in the longitudinal direction L of the product. Further, the underarm elasticizing portion 200a is disposed so as to straddle the center of the discarded disposable diaper 10 after the product longitudinal direction L.

In this case, the rigidity of the absorbent core material 40a and the rigidity of the other members of the disposable disposable diaper 10 can be appropriately selected, and the thickness of the elastic member to be used, the pitch of the arrangement, and the like can be appropriately selected, but When the main body of the disposable diaper 10 is in a natural state (non-stretched state), it is preferable that the entire edge portion of the absorbent core member 40a in the product width direction W is contracted.

Further, a notch 115 (notch 125) is formed in the crotch region 25 of the absorber 40. The notch 115 and the notch 125 are regions in which the absorbent core 40a constituting the absorber 40 is not present. In the present embodiment, the notch 115 and the notch 125 correspond to a low-rigidity portion in which the basis weight of the absorbent core member 40a is lower than that of the other portion of the absorbent core member 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 the basis weight of the absorbent core 40a to form the absorbent core 40a. The other parts are low.

The notch 115 and the notch 125 are present along the edge portion L of the crotch portion 200 in the longitudinal direction of the product. Furthermore, even if the notch 115 and the notch 125 are formed, the absorbent core material 40a located in the front waistline region 20 and the back waistline region 30 and the absorbent core material 40a located in the crotch region 25 are not completely separated, especially It is preferred to continue in the width direction.

The notch 115 and the notch 125 are widened in the longitudinal direction W of the product, and the length in the longitudinal direction L of the product is widened. With such a shape, the outer side in the product width direction W of the absorbent core member 40a is more easily contracted, and therefore, it is easier to form a flat bottom portion. Moreover, since the absorbent core material 40a located closer to the front waistline region 20 than the notch 115 and the absorbent core material 40a located closer to the back waistline region 30 than the notch 125 are easily bent to stand up from the [bottom] and are worn along The circular curve of the user's body (abdomen and buttocks) can be used to make the shape of the disposable disposable diaper 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) is such that the center of the arc is located closer to the rear waistline region 30 (front waistline region 20) than the edge. With such a shape, deformation along the arc curve of the wearer's body becomes easier and more likely to occur remarkably.

(4) Method for manufacturing disposable disposable diaper

Next, an absorbent article according to the present embodiment will be described with reference to Fig. 5 . An example of a manufacturing method. Further, in the method not described in the embodiment, an existing method may be used. Moreover, the manufacturing method demonstrated below is only an example, and can also be manufactured by another manufacturing method. The method for producing an absorbent article includes at least a component forming process, a component mounting process, a foot forming process, and a cutting process.

The constituent parts are formed into a process to form constituent parts for constituting the absorbent article. Specifically, for example, the absorbent body 40 is formed by laminating an absorbent material.

In the component mounting process, the first leg stretch material 76 or the second leg stretch material 77 constituting the leg stretch portion 75 and the other mesh material constituting the top sheet are placed on the mesh material constituting the back sheet. The leak-proof sheet, the absorbent body, and the like constitute a component of the disposable disposable diaper 10.

The foot forming process cuts the top sheet 50, the exterior sheet 60, and the like along the concave portion constituting the foot circumference region. Thereby, the foot opening portion 35 disposed on the wearer's foot circumference is formed.

In the continuous body cutting process, a continuous body in which the top sheet 50, the exterior sheet 60, the absorber 40, the first leg stretcher 76, and the second leg stretcher 77 are disposed is cut along the product width direction W. The size of an article. Thereby, the disposable disposable diaper 10 is manufactured.

Next, the configuration of the manufacturing apparatus of the absorbent article used in the component mounting process in which the foot stretchable portion 75 is disposed in the above-described manufacturing method will be described in detail. Fig. 5 is a side view showing the apparatus 100 for manufacturing an absorbent article according to the embodiment. The manufacturing apparatus 100 for an absorbent article has a supply mechanism 110, a swing mechanism 120, a guide mechanism 130, and a cutter The structure 140, the setting mechanism 150, and the adhesive application mechanism 160. In the apparatus 100 for manufacturing an absorbent article, a device for continuously transporting the leg stretchable portion 75 is attached to a mesh material that is conveyed while the components constituting the absorbent article are continuous.

The component mounting process of the arrangement foot extension portion 75 includes a conveyance process, an elongation process, a swing process, a foot cutting process, and a pasting process.

In the conveyance process, the continuous belt-shaped first leg stretch material 76 and the continuous linear second leg stretch material 77 are respectively conveyed.

In the state in which the first leg stretch material 76 and the second leg stretch material 77 are brought together by the supply mechanism 110 and the swing mechanism 120, the first leg stretch material 76 and the second leg stretch material 77 are moved in the transport direction. elongation. In the present embodiment, the first leg stretch material 76 and the second leg stretch material 77 are joined and joined, and the first leg stretch material 76 and the second leg stretch material 77 are extended in the transport direction in the joined state.

Specifically, the second leg stretchable material 77 that is in a state of being extended in the transport direction is continuously conveyed closer to the upstream side in the transport direction than the supply mechanism 110. The second leg stretch material 77 is configured to apply an adhesive by the adhesive application mechanism 160. The adhesive application mechanism 160 is a spray type device that applies an adhesive (for example, a hot melt adhesive), and applies an adhesive to the transported second leg stretch material 77.

Next, the second leg stretchable material 77 to which the adhesive is applied is adhered to the first leg stretchable material 76 that is continuously conveyed. Thereby, the first leg stretch material 76 and the second leg stretch material 77 are integrated and joined. At this time, by not making The first leg stretch material 76 is elongated (or elongated to a lower elongation than the second leg stretch material 77), and the elongation of the second leg stretchable material 77 can be made higher than the elongation of the first leg stretchable material 76.

In addition, the adhesive agent may be applied to the first leg stretch material 76 without applying an adhesive to the second leg stretch material 77. However, by applying an adhesive to the second leg stretch material 77 having a short width, it is possible to suppress the amount of application of the adhesive. Moreover, it is also possible to apply an adhesive to the first leg stretch material 76 and the second leg stretch material 77, respectively.

Then, the first leg stretch material 76 and the second leg stretch material 77 are conveyed by the supply mechanism 110, and the first leg stretch material 76 and the second leg stretch material 77 are sent to the swing mechanism 120. The supply mechanism 110 includes a first rotating mechanism 111, a first roller 112, a belt member 113, and a pinch roller 114. The first rotating mechanism 111 is configured such that the first rotating shaft 111 a is rotated, and the foot elastic member is conveyed along the outer peripheral surface in the transport direction MD. In addition, the belt member 113 is disposed on the outer peripheral surface of the first rotating mechanism 111, and the first leg stretchable material 76 and the second leg stretchable material 77 are conveyed along the outer peripheral surface of the first rotating mechanism 111 via the belt member 113.

The first roller 112 is disposed on the upstream side of the first rotating mechanism 111 closer to the transport direction MD. The belt member 113 is an endless belt that is wound between the first rotating mechanism 111 and the first roller 112. The first leg stretch material 76 and the second leg stretch material 77 are conveyed by the belt member 113 while being in contact with the outer peripheral surface of the belt member 113. The pinch roller 114 is disposed to face the outer circumference of the first rotating mechanism 111. The first leg stretch material 76 and the second leg stretch material 77 pass through the belt member 113 is between the clamping roller 114.

The first rotating mechanism 111 and the first roller 112 rotate in the counterclockwise direction as shown in FIG. 5, and the belt member 113 moves in the counterclockwise direction. The first leg stretch material 76 and the second leg stretch material 77 are the second rotation mechanism 121 that is separated from the outer peripheral surface of the first rotating mechanism and is moved toward the swing mechanism 120 after being transported from the first roller side toward the first rotating mechanism side. Transfer.

The rotational speed of the second rotating mechanism 121 is configured to be faster than the rotational speed of the first rotating mechanism 111. The first leg expansion material 76 and the second leg expansion material 77 are configured to be guided from the first rotation mechanism 111 to the second rotation mechanism 121 by the speed difference between the first rotation mechanism 111 and the second rotation mechanism 121. , elongated in the direction of transport. The first leg stretch material 76 and the second leg stretch material 77 that are transported by the first rotating mechanism are configured such that the elongation of the second leg stretch material is higher than the elongation of the first leg stretch material. Since the second rotating mechanism 121 reaches the second rotating mechanism 121, the elongation of the second leg stretchable material 77 is also higher than the elongation of the first leg stretchable material 76.

In the present embodiment, the foot expansion-contraction portion 75 is configured by the supply mechanism 110. However, the first extension member and the second-foot extension member may be attached to each other without the supply mechanism 110. The expansion and contraction portion 75 is guided toward the swing mechanism 120.

In the swinging process, the first leg stretch material 76 and the second leg stretch material 77 in the extended state are conveyed while being displaced in the intersecting direction orthogonal to the conveyance direction. The swing mechanism 120 includes a second rotation mechanism 121, a third rotation mechanism 122, and a coupling arm 123. Second rotation In the rotation mechanism 121, the second rotation shaft 121a is used as a winding center, and the leg expansion/contraction portion supplied from the first rotation mechanism 111 is conveyed along the outer circumferential surface, and is conveyed to the fourth rotation mechanism 131 to be described later.

The second rotating mechanism 121 is coupled to the third rotating mechanism 122 that rotates around the third rotating shaft 122 a via the connecting arm 123 . One end 123c of the connecting arm 123 is coupled to the outer peripheral surface of the third rotating mechanism 122, and the other end 123d of the connecting arm 123 is coupled to the second rotating shaft 121a of the second rotating mechanism 121. By rotating the third rotating mechanism 122, the second rotating mechanism 121 swings in the width direction orthogonal to the conveying direction MD. The second rotation mechanism 121 sends the first leg stretch material 76 and the second leg stretch material 77 to the guide mechanism 130 while swinging in the width direction at a predetermined cycle. The leg stretch material is conveyed toward the guide mechanism 130 while being displaced in the width direction, and the first leg stretch material 76 and the second leg stretch material 77 fed from the swing mechanism 120 are arranged in a curved shape on the outer peripheral surface of the guide mechanism 130.

The guide mechanism 130 has a fourth rotation mechanism 131 that expands and contracts the first leg while maintaining the shape of the first leg stretch material 76 and the second leg stretch material 77 supplied from the swing mechanism 120. The material 76 and the second leg stretch material 77 are sent to the setting mechanism 150. The fourth rotating mechanism 131 has a plurality of holding members (not shown), and conveys the first leg stretchable material 76 and the second leg stretchable material 77 via the holding member.

In the leg cutting process, the first leg stretcher 76 and the second leg stretcher 77 are cut by the cutting mechanism 140 to the length of the product. The cutting mechanism 140 cuts the first leg stretch material 76 and the second leg stretch material for each holding member. 77. The first leg stretchable material 76 and the second leg stretchable material 77 that are cut by the cutting mechanism 140 are set to have lengths of the leg stretchable portion 75 of each product.

In the pasting process, the first leg stretch material 76 and the second leg stretch material 77 that have been cut are adhered to the mesh by the setting mechanism 150. The installation mechanism 150 is provided with a plurality of rollers, and the components are joined by holding the components between the rollers. Specifically, for example, the first leg stretch material 76 and the second leg stretch material 77 that have been cut by the cutting mechanism 140 are intermittently provided on the outer sheet web 60W in which the outer sheet 60 is continuously conveyed. According to the above process, the leg expansion and contraction portion 75 can be placed on the mesh material.

In the installation mechanism 150, after the first leg stretch material 76 and the second leg stretch material 77 are adhered to the exterior sheet web, the absorber 40 and the top sheet coated with the adhesive by the adhesive application mechanism 160 are attached. 50 consecutive top sheet webs 50W were adhered. Thus, a continuous body in which the disposable disposable diaper is continuous in the longitudinal direction L of the product is formed. Next, the continuous body is cut into the size of a product along the width direction W of the product. Thereby, the disposable disposable diaper 10 is manufactured.

Further, in the present embodiment, the leg stretch portion 75 is provided on the exterior sheet web 60W. However, the present invention is not limited to this configuration. In the absorbent article having the side sheet, the foot stretchable can be disposed on the web constituting the side sheet. In the portion 75, the foot elastic member may be disposed on the other mesh materials.

In the present embodiment, the first leg stretch material 76 and the second leg stretch material 77 are conveyed while being joined. However, the first leg stretch material 76 and the second leg stretch material 77 may not be joined. In the state of being transported to each other, it is individually stretched or oscillated.

Moreover, the foot cutting process may be performed after the swing process, or the swing process may be performed after the foot cutting process.

In the foot forming process, the top 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 foot opening portion 35 disposed on the wearer's foot circumference is formed.

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

(5) Effect

In the disposable disposable diaper of the present embodiment, the first leg stretchable material and the second leg stretchable material are provided, and the non-stretchable side sheet can be partially contracted by the second leg stretchable material 77 to suppress the expansion and contraction of the foot. Wrinkles are generated in the whole of the portion 75, and the entire 1st leg stretchable material 76 can be disposed in a planar shape along the wearer's foot circumference.

In addition, since the second leg stretch material is disposed along the inner end portion of the first leg stretch material in the product width direction of the center of the product width direction of the first leg stretch material, it is possible to suppress adhesion to wear. The outer end portion of the first leg stretch material in the portion around the foot is excessively adhered to the outer end portion in the product width direction, and the skin irritation caused by the opening portion of the foot can be reduced.

Since the length of the first leg stretch material in the product width direction is constant, the leg stretch portion 75 can be disposed so as to be in contact with the wearer's foot in the same region, and the foot stretch portion 75 can be prevented from being partially adhered to each other. Feet circumference.

Since the second leg stretch material 77 is disposed on the non-skin contact surface side of the first leg stretch material 76, the portion that is contracted by the second leg stretch material is less likely to directly contact the skin. It can reduce the irritation caused by wrinkles.

The leg stretchable portion 75 is disposed closer to the outer side in the width direction of the product than the second joint portion 81B which is wrinkled on the leg side. For example, when the leg expansion/contraction portion 75 is disposed closer to the inner side in the width direction than the second engagement portion 81B, the second engagement portion 81B is raised from the second extension portion 81B in the width direction inner side by the leg expansion/contraction portion 75, and the constricted portion 84 faces It occurs when the outside of the width direction stands up. However, since the leg stretch portion 75 is disposed closer to the outer side in the width direction than the second joint portion 81B, the stretchable portion 84 easily stands up toward the wearer side.

(6) Other embodiments

The present invention has been described by way of example only, and is not intended to limit the invention. The present invention includes various alternative embodiments, examples, and operational techniques that are apparent to those skilled in the art from this disclosure.

For example, the second leg stretch material may be disposed not along the first leg stretch material, or may be partially offset.

The length of the first leg expansion material in the width direction of the product is not necessarily constant, and the length in the width direction of the partial product may be different.

The outer end portion of the first leg expansion material in the longitudinal direction of the product and the second foot extension The outer end portion of the product in the longitudinal direction of the shrinkage material may also be uniform.

The leg stretchable portion 75 may be aligned with the joint portion of the leg side wrinkles in the product width direction, or may be disposed closer to the inner side in the product width direction than the joint portion of the leg side wrinkles.

Further, in the above-described embodiment, the disposable disposable diaper has been described as an example. However, the present invention is also applicable to a disposable diaper for a shorts type. A pair of pants-type diapers having a waist opening portion and a pair of foot opening portions are formed by joining the right and left side edges of the front waist region and the back waist region outer sheet, and the outer waist sheets of the front waist region and the back waist region have The elastic member which can be contracted and extended in the width direction W of the product can hold the disposable disposable diaper to the waist of the wearer by shrinking the elastic members. That is, the range of the left and right side edge portions which are joined in the longitudinal direction L of the product is a waistline holding portion.

As such, the present invention naturally includes various embodiments not described herein. Therefore, the technical scope of the present invention is determined by the specific matters of the invention from the above description only by the scope of the invention.

Further, all the contents of the Japanese Patent Application No. 2012-103412 (filed on Apr. 27, 2012) are hereby incorporated by reference.

[Industrial use possibility]

According to the present invention, it is possible to provide a disposable disposable diaper which is disposed in a planar shape on the wearer's circumference and which can suppress irritation to the skin.

10‧‧‧Disposable disposable diapers

40‧‧‧ absorber

40a‧‧‧Absorbent core

40b‧‧‧ core material cladding

50‧‧‧ top sheet

60‧‧‧Outer sheets

60a‧‧‧back sheet

70‧‧‧Fringe

71‧‧‧Flexible components

76‧‧‧1st leg expansion material

77‧‧‧2nd foot expansion material

Claims (10)

A disposable disposable diaper having a front waist region, a rear waist region, and a crotch region between the front waist region and the back waist region, and having a length of the article from the front waist region toward the rear waist region a direction and an absorbent body extending across at least one of the crotch region and the crotch region toward the front waist region and the rear waist region; and a product width direction orthogonal to the longitudinal direction of the product; a foot expansion portion that is disposed in a foot opening portion that is closer to the outer side in the width direction of the product than the absorber, and that is stretchable along the longitudinal direction of the product, wherein the foot opening portion and the foot expansion portion are The leg-expanding portion is provided with a band-shaped first leg stretchable material having a predetermined length in the product width direction, and extending outward from the crotch region toward the outer side in the product width direction of the product; and It is disposed in the first leg stretch material arrangement region in which the first leg stretch material is disposed, and the product width is larger than the first leg stretch material The second leg-shaped stretchable material having a short length in the direction is provided at a position closer to the skin contact surface side than the first leg stretchable material and the second leg stretchable material, and is provided with the first leg stretchable material and/or Or the non-stretchable sheet material joined to the second leg stretchable material, and the elongation of the product in the longitudinal direction of the second leg stretchable material is compared The first leg expansion material has a high elongation in the longitudinal direction of the product, and an end portion of the second leg stretch material in the longitudinal direction of the product is disposed at an end portion of the first leg stretch material in the longitudinal direction of the product. Closer to the inside of the length of the product. A disposable disposable diaper having a front waist region, a rear waist region, and a crotch region between the front waist region and the back waist region, and having a length of the article from the front waist region toward the rear waist region a direction and an absorbent body extending across at least one of the crotch region and the crotch region toward the front waist region and the rear waist region; and a product width direction orthogonal to the longitudinal direction of the product; a foot expansion portion that is disposed in a foot opening portion that is closer to the outer side in the width direction of the product than the absorber, and that is stretchable along the longitudinal direction of the product, wherein the foot opening portion and the foot expansion portion are The leg-expanding portion is provided with a band-shaped first leg stretchable material having a predetermined length in the product width direction, and extending outward from the crotch region toward the outer side in the product width direction of the product; and It is disposed in the first leg stretch material arrangement region in which the first leg stretch material is disposed, and the product width is larger than the first leg stretch material The linear second leg stretch material having a short length in the direction is closer to the first leg stretch material and the second leg stretch material A non-stretchable sheet material joined to the first leg stretchable material and/or the second leg stretchable material is provided at a position on the skin contact surface side, and the elongation of the product in the longitudinal direction of the second leg stretchable material is compared The first leg stretchable material has a high elongation in the longitudinal direction of the product, and a plurality of non-stretchable sheets are laminated on the non-skin contact surface side of the leg stretchable portion, and the length direction of the product is larger than the length of the leg stretchable portion. The number of layers of the sheet material closer to the center of the front waistline region is larger than the number of layers of the sheet material on the side of the back waistline region from the center of the longitudinal direction of the product of the leg stretchable portion. A disposable disposable diaper according to the first or second aspect of the invention, wherein the second leg stretchable material is disposed along an inner end portion of the first leg stretchable material in a width direction of the product. A disposable diaper according to the first or second aspect of the invention, wherein the first leg stretch material has an elongation of 1.4 to 2.2 times, and the second leg stretch member has an elongation of 1.7 to 2.5 times. A disposable disposable diaper according to the first or second aspect of the invention, wherein the second leg stretchable material is disposed on a non-skin contact surface side of the first leg stretchable material. The disposable diaper of the first or second aspect of the invention, wherein the second leg stretchable material is disposed closer to the inner side in the width direction of the product than the center of the product width direction of the first leg stretchable material . Disposable disposable urine if applied for the first or second patent scope Further, the cloth further includes a leg-side expansion-contraction portion that is disposed closer to the inner side in the width direction of the product than the leg expansion-contraction portion, and has a contraction portion that is expandable and contractible along the longitudinal direction of the product. The leg expansion-contraction portion is disposed closer to the outer side in the product width direction than the base end portion of the leg-side expansion-contraction portion. A disposable diaper according to the first or second aspect of the invention, wherein the inner end portion of the first leg stretchable material in the width direction of the product and the outer end of the first leg stretchable material in the width direction of the product The departments are configured in parallel. In the method of producing an absorbent article, the first member of the leg stretchable portion disposed along the opening of the foot is attached to the mesh member that is transported in a continuous state after the constituent components of the disposable disposable diaper are configured. The method for producing an absorbent article of a stretchable material and a second leg stretch material, comprising: a transport process in which a continuous strip-shaped first leg stretch material and a continuous linear second leg stretch material are respectively transported; In a state in which the first leg stretch material and the second leg stretch material are collected, an elongation process in which the first leg stretch material and the second leg stretch material are elongated in a conveyance direction is performed; and the first leg in the extended state is stretched and contracted. a swaying process in which the material and the second-foot stretch material are transported while being displaced in a direction orthogonal to the transport direction; and a cutting process for cutting the first-foot stretchable material and the second-foot stretchable material by the length of the product; The first leg stretch material and the second leg stretch material that have been cut are adhered to the bonding process of the mesh material, In the conveyance process, the first leg stretch material is conveyed while the second leg stretch material is extended in the transport direction, and the elongation of the second leg stretch material is higher than the elongation of the first leg stretch material. 2 feet of stretch material. The method for producing an absorbent article according to the ninth aspect of the invention, wherein the first leg expansion and contraction is performed in a state in which the first leg stretchable material and the second leg stretchable material are joined to each other in a conveyance direction. The material and the second leg stretch material are elongated.