KR101478864B1 - Pants type disposable diaper - Google Patents

Abstract

SUMMARY OF THE INVENTION The present invention has an object of securing sufficient seal strength and facilitating peeling.
The back side outer sheet 12F and the back side outer sheet 12B are not continuous and spaced apart from each other on the side of the proximal side and the two side sheets 12F and 12B are provided with the waist side folding portion 21 and the distal side folding portion 22 Side end portions of the back side folding portion 21 and the waist side end edges of the high-density side folding portion 22 coincide with each other and the sheet-like air permeability at the waist side end portion of the side seal portion 12A The number of laminated sheets of the sheet-like breathable material 12 in the intermediate portion between the waist side end portion and the high-gap side end portion is the same as the number of laminated sheet- , The waist side end portion, and the high-gap side end portion of the diaper.

Description

Pants type disposable diaper {PANTS TYPE DISPOSABLE DIAPER}

The present invention relates to a pull-on type disposable diaper.

A disposable diaper having a pants shape is characterized in that an absorbent body is interposed between a liquid permeable top sheet and a back sheet and includes a built-in body which is provided on both sides with a girth around the legs and covers the back side from the back side, And both side portions of the back side portion and the back side portion of the back side portion of the outer sheet are bonded to each other by heat sealing to form the side seal portion, (See Patent Documents 1 to 8) in many cases.

In this pants-type disposable diaper, for example, as shown in Fig. 25, the outer sheets 12F and 12B are formed by joining the sheet-like breathable materials 12, 21 and 22 of plural layers in order to improve fitability to the body And the elastic stretchable members 15 to 19 such as thread rubber are sandwiched and fixed between the sheet-like breathable materials 12, 21 and 22 in a stretched state along the width direction. The interlaminar bonding of the sheet-like breathable material is generally carried out by bonding with an adhesive such as a hot melt adhesive or by heat sealing or ultrasonic sealing.

Further, when the diaper is peeled off after being put out, since the back side portion and the back side side portion of the side seal portion are pulled off and removed from the body, the side seal portion is provided with not only the seal strength not to be torn during mounting, It is required to be easily peeled off, and various techniques have been proposed heretofore.

Patent Document 1: JP-A-2000-316898 Patent Document 2: JP-A-2003-38573 Patent Document 3: Japanese Patent No. 3507479 Patent Document 4: Japanese Patent No. 3508044 Patent Document 5: Japanese Patent No. 3706553 Patent Document 6: Japanese Patent No. 3737709 Patent Document 7: Japanese Patent No. 3749855 Patent Document 8: Japanese Patent No. 3781534

However, in the conventional pull-on disposable diaper, air permeability and flexibility have been lowered due to the fact that the entire outer sheet is formed by joining sheet-like breathable materials.

Since the side seal portion is a portion formed by stacking a plurality of sheet-like materials such as nonwoven fabric and the number of layers of the sheet-like material is different at the waist side end portion and the high-gap side end portion of the side seal portion, There is a problem in that it becomes difficult to peel off, and either one of the welds becomes excessively weak and unintended peeling occurs during use.

For example, as shown in Fig. 25, in the conventional pants-type paper diaper, the waist side end portion of the sheet-like material 12 located at the outermost position is folded back to the innermost side for the purpose of improving the feeling of touch, The upper edge portion of the sheet-like material 12 is covered and hid from the edge of the sheet-like material 12. In this case, the number of sheets of the sheet-like material 12 in the upper portion (the upper portion in FIG. 12, the upper portion of the side seal portion is welded relatively strongly. That is, if the upper side portion of the side seal portion is manufactured to be properly welded, the lower side portion is not sufficiently welded, and there is a fear that the seal is peeled off due to strong force applied around the leg portion, The upper portion is strongly welded, and it is almost impossible to peel off after use, so that it is very difficult to set appropriate conditions.

Furthermore, such a problem has been difficult to solve by changing the welding pattern described in each of the aforementioned patent documents.

SUMMARY OF THE INVENTION Accordingly, a principal object of the present invention is to improve air permeability and flexibility while suppressing deterioration of fit performance in an outer sheet. Another object of the present invention is to provide a side seal portion with sufficient seal strength and ease of peeling, and to improve the feeling of wearing by improving the feeling of touch.

The present invention which solves the above problems is as follows.

<Invention according to Claim 1>

A tubular waist portion formed by joining both side portions of the back side outer sheet and both side portions of the back side outer sheet,

And a built-in body for absorbing excretion formed from a widthwise central portion of the inner surface of the back side outer sheet to a widthwise central portion of the inner side surface of the back side outer sheet,

Wherein the back side outer sheet and the back side outer sheet are not continuous on the side of the back side and are spaced apart from each other. In the pull-on type disposable diaper,

The back side outer sheet and the back side outer sheet have a waist side end portion, a waist circumference upper end portion, a waist circumference middle portion, and a waist circumference lower end sequentially from above in the same vertical direction range as the side seal portion to be joined,

At least one of the back side outer sheet and the back side outer sheet; Like waist-side end portion and the waist-surrounding lower end portion are formed by joining of sheet-like breathable materials of a plurality of layers, and the elastic stretchable member is sandwiched and fixed between these sheet-like breathable materials in a stretched state along the width direction, Wherein at least one of the upper end and the waist middle portion is made of a single sheet of air permeable material and does not have an elastic stretchable member and an adhesive for fixing the elastic stretchable member.

(Action effect)

In at least one of the back side outer sheet and the back side outer sheet, at least one of the waist upper end and the waist middle portion is formed of a single sheet of air permeable material, and the elastic stretchable member and the adhesive for fixing the elastic sheet are provided The air permeability and the flexibility are excellent. Further, the waist side end portion and the waist surrounding lower end portion of at least one of the back side facing sheet and the back side facing sheet are formed by joining sheet-like breathable materials of a plurality of layers, and elastic stretchable members are arranged between the sheet- The waist circumference and the pawl perimeter necessary for the pants-type disposable diaper can be sufficiently secured.

<Invention according to Claim 2>

The waist side end portion and the waist circumferential lower end portion of the back side outer sheet and the back side outer sheet are formed by joining a plurality of sheets of air permeable material and the elastic stretchable member is stretched between the sheet air permeable materials along the width direction State,

The waist-surrounding intermediate portion of the back waist circumference upper end portion and the back waist circumference upper portion of the back side facing sheet is made of a sheet-like breathable material having a single layer and does not have an elastic stretching member and an adhesive for fixing the same. A disposable pull-on diaper comprising:

(Action effect)

In this case, since the waist-surrounding upper half portion of the back side outer sheet and the waist surrounding middle portion of the back side outer sheet are made of a single sheet of air-permeable material and do not have the elastic stretchable member and the adhesive for fixing the same, Flexibility is excellent. In addition, the waist side end portion and the waist circumference lower end portion of the back side outer sheet and the back side outer sheet are formed by joining the sheet-like breathable materials of plural layers, and the elastic stretchable members are stretched along the width direction So that it is possible to sufficiently secure the padding of the waist circumference and the perimeter of the pants-type disposable diaper.

<Invention according to Claim 3>

The shoulder extension portion has a widthwise center portion overlapping with the inner body and a buttock cover portion extending to both sides of the inner side cover portion. Wherein the shoulder extension portion is formed by joining sheet-like breathable materials of plural layers, and the elastic stretchable member is held and fixed at least in the buttock cover portion between these sheet-like breathable materials in a state elongated along the width direction , And the contraction force in the width direction at the lower end of the trunk periphery of the back side outer sheet is greater than the contraction force in the transverse direction at the lower end of the trunk circumference and the extension at the back side of the back side outer sheet. .

(Action effect)

It is preferable that an isosceles extended portion extending downward beyond the side seal portion is formed on the back side outer sheet so that both side portions below the buttocks can be covered and hidden by the buttock cover portions which are both side portions of the side seal portion. In this case, it is preferable that the elastic stretchable member is formed in a stretched state along the width direction in the buttock cover portion so that both side portions of the extended portion are not rolled up.

However, when the elastic stretchable member is formed on the buttock cover portion, if the contraction force balance between the back side and the back side with the side seal portion as a boundary is broken and the back side side of the side seal portion strongly acts on the back side, Side seal portion 12A of the back side outer sheet 12F is shifted to the back side by the lower end side at the time of use as a result of the deviation, There is a possibility that a rise or a rise may occur. Therefore, it is preferable to prevent the hair portion cover portion from being curled up or swollen as shown in Fig.

<Invention according to Claim 4>

Wherein the waist-surrounding intermediate portion of the back side facing sheet and the waist-surrounding upper end portion of the back side facing sheet are formed by joining sheet-like breathable materials of a plurality of layers, and the elastic stretchable member has a width The disposable pull-on diaper according to claim 3, wherein the pull-on type disposable diaper is held and fixed in a stretched state along a direction of the pull-tab.

(Action effect)

The breathability and flexibility are improved in the structure in which the entire or almost entirety of the waist-surrounding middle portion and the waist-surrounding upper end portion is formed of a single-layer sheet-like breathable material and does not have the elastic stretchable member and the adhesive for fixing the elastically stretchable member, The pit property is lowered, and the trunk circumference becomes easier to loose. On the other hand, as described in this section, in the back side facing sheet, the middle portion of the waist circumference may be a portion having a plurality of layers or elastic stretching members and an adhesive, and the waist portion upper end portion may be a portion having no elastic stretching member and adhesive In the case of the back side outer sheet, the middle portion of the waistline has a portion which does not have the elastic stretchable member and the adhesive, and the upper portion of the waistline has a plurality of layers and also the portion having the elastic stretchable member and the adhesive. The pit fit around the trunk is not lowered well, and the trunk circumference does not loosen well.

<Invention according to claim 5>

Wherein the waist-surrounding intermediate portion and the waist-surrounding sheath upper portion of the back side facing sheet are made of a single sheet of air-permeable material and do not have the elastic stretching member and the adhesive for fixing the same, And the disposable diaper.

(Action effect)

Furthermore, with respect to the waist-surrounding intermediate portion of the back side outer sheet and the waist surrounding upper end portion of the back side outer sheet, it is also possible to adopt a structure in which the elastic stretchable member and the adhesive for fixing the waist- , Air permeability and flexibility are further improved.

<Invention according to Claim 6>

The pull-on type disposable diaper according to Claim 3, wherein a side seal portion inclination angle in the side seal portion inclination test is 20 degrees or less.

(Action effect)

It is possible to effectively prevent the rise and swelling of the buttock cover portion by constituting the joining portion so that the angle of inclination of the joining portion in the joining portion inclination test is 20 degrees or less. The side seal portion inclination test is to measure the inclination angle of the side seal portion in the following manner. 28 (a), only the waist portion 12, from which the absorbent body is removed from the diaper, is manufactured as a specimen, and the specimen 12 is placed on the back side external sheet 12F And the center line in the product width direction of the back side sheet 12B are folded so as to overlap each other on the inner side so as to form a fold line L1 of the both side seal portions 12A And an end edge on the widthwise center side of the seal portion 12A). Subsequently, the specimen 12 in the folded state is put on one of the chucks C1 of the tensile tester in the entire upper and lower direction of the product in a range of 10 mm from the one folding line toward the side seal portion, A tensile test is carried out along the direction of the abdomen back of the product indicated by an arrow by inserting a range of 10 mm from the folding line to the side seal portion into the other chuck C2 of the tensile tester throughout the entire product upper and lower direction. The distance between the chucks (the length of the natural contraction date and time) in a state where the specimen 12 is naturally contracted without pulling it is A, and the distance between the chucks when pulled up to the state of no contraction by the elastic stretchable member (A + B) / 2, as shown in Fig. 28 (b), where B is the distance between the top and bottom of the product The inclination angle? Of the imaginary line L2 connecting the upper and lower ends of the first and second seal portions L1 and L1 is measured using a separator and is defined as a side seal portion inclination angle.

The shrinkage force is a stress applied to a predetermined width (longitudinal length) of the sheet when the sheet is pulled in the widthwise direction of the product, and is measured in the following manner. That is, first, an area to be measured is cut out from the waist portion 12 to form a specimen, one end of the specimen in the product width direction is fitted to one chuck C1 of the tensile tester, Is put on the other chuck C2 and a tensile test is performed along the product width direction. The distance between the chucks (the length at the time of natural contraction) in a state where the specimen is naturally contracted without pulling the specimen is A, and the distance between the chucks when pulled up to the state of no contraction by the elastic stretchable member (A + B) / 2 when the distance between the chucks is taken as B, and the stress applied between the chucks when the distance between the chucks is taken as A / B do.

<Invention according to Claim 7>

The pants-type disposable diaper according to Claim 2, wherein the inner edge of the front and rear ends of the inner body do not include a film material or a sheet material made of a paper material.

(Action effect)

By configuring as described in this paragraph, the end edges of the front and rear end portions of the inner body are thin, smooth, and excellent in air permeability. Therefore, when combined with the constitution covering the front and rear ends of the inner body, it is possible to further improve the feeling of fit, and even if the inner body is exposed without covering, the deterioration of the feeling of wearing can be suppressed.

<Invention according to Claim 8>

Wherein the number of laminated sheet-like materials at the waist side end portion and the number of laminated sheet-like materials at the high-temperature side end portion of the side seal portions, which are both sides of the back side outer sheet and both side portions of the back side outer sheet, And the number of laminated sheet-like materials in the middle portion between the waist side end portion and the high-gap side end portion is equal to or less than the number of laminated sheet-like materials at the waist side end portion and the high-gap side end portion A disposable pull-on diaper comprising:

(Action effect)

In order to ensure sufficient seal strength of the side seal portion and ease of peeling, it is possible to simply adjust the number of stacked sheet-like materials in the outer sheet. However, there are various restrictions on the laminated structure of the sheet-like material in the outer sheet. For example, if the edge of the sheet-like material is exposed to the edge portion of the sheet, such as the edge of the waist opening of the outer sheet or the edge of the leg opening, the sheet may be peeled off or the skin may be deteriorated. And the waist side end portion of the outermost sheet-like material is folded back to the innermost side to cover and cover the end edge of the sheet-like material. Further, in the case where the elastic stretchable member such as the thread rubber is sandwiched and fixed between the sheet-like materials, the laminated structure of the sheet-like material is restricted by the arrangement of the elastic stretchable members and the like. Therefore, simply adjusting the number of stacked sheets of the sheet-shaped material in the outer sheet does not impair other functions.

On the other hand, in the present invention, the number of laminated sheet-like materials in the side seal portion is made the same at the waist side end portion and the high-gap side end portion, and at the middle portion between them, the same number as the waist- Or equal to or less than the thickness of the intermediate portion, uniform sealing strength can be obtained at the waist side end and the high-k side end portion by forming the side seal portion evenly, and a bonding strength equal to or weaker than that at the intermediate portion can be obtained. Therefore, at the waist side end portion and the high-gap side end portion of the side seal portion, which is a portion where a particularly strong force is applied during the mounting, and which becomes a starting point or an end point for peeling off, there is no unintended peeling during mounting, When the side seal portion is formed so as to have an appropriate bonding strength, the bonding strength of the intermediate portion is equal to or less than that required for smooth peeling (preferably not stronger than the starting point and the end point) when peeling off after use, Is easily peeled off after use without any unintended peeling during mounting.

In addition, in the present invention, the rear outer sheet and the back side outer sheet are separated without continuing, and in each outer sheet, the waist side end portion and the high-shear side end portion are made to have the same re- The end edge of the sheet-like material of each outer sheet is not exposed to the edge of the outer sheet, and even when the sheet-like material is stacked, As described later, it is also possible to nip and fix the elastic stretchable member to the folded portion. Therefore, according to the present invention, sufficient sealing strength can be ensured and peeling ease can be achieved without impairing other functions.

The back side outer sheet and the back side outer sheet are folded so that the sheet-like material constituting the outermost side covers from the waist side end edge of the innermost face to the end edge of the innermost side or the vicinity thereof In this case, the end edge of the sheet-like material of each outer sheet is exposed at the outer edge of the outer edge of the outer sheet. In particular, at the edge of the waist side where detachment or deterioration of the skin tends to occur, The end edge of the material will not be exposed. Therefore, almost the same effect as that of the above-described embodiment can be exhibited.

<Invention according to claim 9>

The pants-type disposable diaper according to Claim 8, wherein the welding bonding is performed by ultrasonic welding.

(Action effect)

The influence of the sheet-like material laminated water as described above is remarkable in the case of forming a bonded portion by ultrasonic welding. Therefore, the present invention is suitable for such a case.

<Invention according to claim 10>

The pull-on disposable diaper according to Claim 9, wherein the side seal portion is linearly formed from an upper edge to a lower edge of a portion where both side portions of the back side external sheet overlap with both side portions of the back side external sheet.

(Action effect)

The present invention is particularly suitable for the side seal portion as described in this section.

INDUSTRIAL APPLICABILITY As described above, according to the present invention, both sufficient securing of seal strength and easiness of peeling can be achieved, and an advantage of improving the feeling of touch and improving the feeling of wearing can be obtained.

Brief Description of the Drawings Fig. 1 is a plan view showing the inner surface of a pull-on type disposable diaper of the first embodiment in a state in which the diaper is deployed. Fig.
Fig. 2 is a plan view of the pull-on type disposable diaper according to the first embodiment in a state in which the diaper is deployed. Fig.
3 is a sectional view taken along line 3-3 of Fig.
4 is a cross-sectional view taken along line 4-4 of Fig.
5 is a cross-sectional view taken along line 5-5 of Fig.
Fig. 6 is a plan view of the pull-on type disposable diaper of the first embodiment in a state in which the diaper is deployed, showing only the main portion of the diaper together with dimensions. Fig.
7 is a cross-sectional view showing only the main portion of the pull-on type disposable diaper together with the dimensions.
8 is a front view of the product state of the first embodiment;
9 is a rear view of the product state of the first embodiment;
10 (a) is a perspective view schematically showing an inner surface of a diaper in an expanded state of the first embodiment, and Fig. 10 (b) is a sectional view showing a material laminated structure of a side sealed portion.
11 is a plan view showing the inner surface of the pull-on type disposable diaper according to the second embodiment in a state in which the diaper is deployed.
12 is a cross-sectional view taken along line 6-6 of Fig.
Fig. 13 (a) is a perspective view schematically showing an inner surface of a diaper in an expanded state of the second embodiment, and Fig. 13 (b) is a sectional view showing a material laminated structure of a side sealed portion.
14 is a plan view showing the inner surface of the pull-on type disposable diaper according to the third and fifth forms in a state in which the diaper is deployed.
15 is a sectional view taken along line 7-7 of Fig.
Fig. 16 is a plan view showing the inner surface of the pull-on type disposable diaper according to the fourth embodiment in a state in which the diaper is deployed. Fig.
17 is a sectional view taken along line 8-8 in Fig.
Fig. 18 is a plan view of the diaper in a deployed state, showing the inner surface of the diaper of the first modification. Fig.
19 is a plan view of the diaper in a deployed state, showing the outer surface of the diaper in a modified form of the first embodiment;
Fig. 20 is a plan view showing the inner surface of the pull-on type disposable diaper according to the sixth embodiment in a state in which the diaper is deployed. Fig.
21 is a plan view showing a state in which a built-in body is expanded, showing an inner face of the built-up body of the sixth embodiment;
22 is a cross-sectional view taken along the line 1-1 of Fig.
23 is a sectional view taken along the line 2-2 in Fig.
24 is a cross-sectional view taken along the line 9-9 in Fig.
Fig. 25A is a perspective view schematically showing the inner surface of the diaper in a deployed state of the conventional type, and Fig. 25B is a sectional view showing the material laminated structure of the side sealed portion.
26 is a photograph showing the mounting state.
27 is a photograph showing the mounting state.
Fig. 28 is a schematic view showing the testing procedure of the joining portion inclination test.
Fig. 29 is a plan view showing the inner surface of the pull-on type disposable diaper according to the seventh form in a state in which the diaper is deployed. Fig.
30 is a plan view of the pull-on type disposable diaper according to the seventh form, in a state in which the diaper is deployed.
31 is a cross-sectional view taken along line 5-5 of Fig.
32 is a front view of the product state of the seventh embodiment;
33 is a rear view of the product state of the seventh embodiment.
FIG. 34A is a perspective view schematically showing the inner surface of the diaper in the expanded state of the seventh embodiment, and FIG. 34B is a sectional view showing the material laminated structure of the side sealed portion.
FIG. 35A is a perspective view schematically showing the inner surface of the diaper in the expanded state of the eighth embodiment, and FIG. 35B is a sectional view showing the material laminated structure of the side sealed portion.
36 is a plan view showing the inner surface of the pull-on type disposable diaper according to the ninth embodiment in a state in which the diaper is deployed.
37 is a cross-sectional view taken along line 7-7 of Fig.
38 is a plan view showing the inner surface of the pull-on type disposable diaper according to the tenth form, in a state in which the diaper is deployed.
39 is a sectional view taken along the line 8-8 in Fig.
40 is a plan view of the diaper in a deployed state, showing the inner surface of the diaper in a modified form of the seventh embodiment;
41 is a plan view of the diaper in a deployed state, showing the outer surface of the diaper according to a modification of the seventh embodiment.
Fig. 42 is a plan view showing the inner surface of the pull-on type disposable diaper according to the eleventh embodiment in a state in which the diaper is deployed. Fig.

Hereinafter, various forms of the pull-on type disposable diaper will be described in detail with reference to the accompanying drawings. In the following description, the term "front-rear direction" refers to a direction connecting the back side (front side) and the back side (back side), and "width direction" means a direction (left- Quot; vertical direction &quot; refers to a state in which the diaper is mounted, that is, in a direction orthogonal to the waist-hole direction when the diaper is folded in two in the crotch portion so as to overlap both sides of the front and back sides of the diaper, As shown in FIG.

<First Embodiment>

1 to 9 show a pull-on disposable diaper according to a first embodiment. This pants-type disposable diaper has a back side outer sheet 12F covering the back side of the wearer's waist and an isometric side outer sheet 12B covering the back side, and both side edges in the width direction of the back side outer sheet 12F, And the widthwise opposite side edge portions of the side wall portions 12B are welded and bonded to each other by heat sealing, ultrasonic welding or the like over the entire upper and lower direction of the overlapping portions of the two portions 12B to form the tubular waist portion 100. Reference numeral 12A denotes a side seal portion in which both external sheets 12F and 12B are welded and joined. The welding pattern of the side seal portion 12A can be a known one without any particular limitation. For example, linear or point-like joint portions along the longitudinal direction or the oblique direction may be arranged in a line or a plurality of rows at predetermined intervals along the vertical direction Or a pattern in which the joining portions continue in a straight line along the vertical direction.

When the back side outer sheet 12B extends downward beyond the side side seal portion 12A as shown in the figure, it is integrally subjected to processing such as heat sealing in the vertical direction range including up to this side portion, The extension portion 12E may be formed on the shoulder extension portion 14. By forming the extension seal portion 12E, it is possible to prevent the second elongate elastic stretchable member 16 of the back side extensions 14, which will be described later, from being pulled. In this case, in consideration of the fact that the side portion is liable to be torn, the side seal portion 12A is formed of a small set of bonded portions, and it is general that a bonded pattern having a low ratio of the welded area in the side seal portion 12A It is not necessary to consider that the extension seal portion 12E tends to be easily torn. Therefore, the welded pattern can be made such that the ratio of the welded area is higher than that of the side seal portion 12A, As shown in Fig.

The inner body 200 is provided so as to extend from the center in the width direction of the inner surface of the rear outer sheet 12F to the center in the width direction of the inner surface of the back side outer sheet 12B in the waist portion 100, 12F and the back side outer sheet 12B are not continuous and spaced from each other. The spacing distance Y may be about 150 to 250 mm.

7 and 8, the upper opening of the waist portion 100 serves as a waist opening WO passing through the body of the wearer. On both sides in the width direction of the inner body 200, The portion surrounded by the lower edge of the inner body 100 and the side edge of the inner body 200 becomes a leg opening LO through which the leg is passed. In a state in which each side seal portion 12A is uncovered and developed, it forms an hourglass shape as shown in Fig. The internal body 200 extends from the back side to the back side to cover the area from the back side to the back side and absorbs excretion to absorb and retain the liquid contents. The waist- As shown in Fig.

(Outer sheet)

As shown in Figs. 4 and 5, the back side outer sheet 12F and the back side outer sheet 12B are formed by folding one sheet of air-permeable material 12 to form a two-layer structure, The waist side upper end U1, the waist intermediate portion U2, and the waist circumferential lower end U3 in the same vertical direction range as the waist side end portion W, the waist side upper end U1, the waist side middle portion U2,

Specifically, in each of the outer sheets 12F and 12B, the sheet-like breathable material 12 is formed as a folding line at the waist side edge (the edge of the waist opening WO) over the entire width direction, And the folded portion 21 is a layer which covers the waist side edge portion W at an innermost position in the vertical direction and the sheet-like breathable material 12 covers the entire widthwise side The end edge is folded back from the outermost face to the innermost face and the folded portion 22 is a layer covering the waist-surrounding lower end portion U3 on the innermost face. Side end portion of the waist side folding portion 21 and the waist side end edge of the high-tension side folding portion 22 are positioned at the upper and lower sides And the spaced portion 23 is a thin layer portion formed of a single sheet of the air-permeable sheet material 12.

The position of the high-side end edge of the waist side folding portion 21 can be appropriately determined, but the position of the high-side end edge of the waist side folding portion 21 can be set to the position of the internal- The front end portion 201 and the rear end portion 202 of the inner body 200 are aligned with the rear end portion of the inner body 20 in the position of overlapping the front end portion of the inner body 20 and the rear end portion of the inner body 20B, The end edges of the internal body constituting material exposed to the front end edge and the rear end edge of the inner body 200 are fixed to the outer edge portions of the outer sheets 12F and 12B Can be covered by the waist side folding portion 21 and it is possible to prevent the inner body 200 from being peeled off from the outer sheets 12F and 12B or to prevent the tactile sensation from being deteriorated by the front and rear ends of the inner body constituting material . This structure is also preferable in that it is easy to manufacture. However, if the front and rear ends of the inner body 200 are suitably soft, they need not necessarily be covered with other sheets.

The sheet-like breathable material 12 constituting each of the outer sheets 12F, 12B is not particularly limited as long as it can be bonded by welding, but it is preferably a nonwoven fabric. The nonwoven fabric is not particularly limited as to the raw fiber. For example, synthetic fibers such as olefins, polyesters, and polyamides such as polyethylene and polypropylene, regenerated fibers such as rayon and cupra, and natural fibers such as cotton, and mixtures of two or more thereof , Conjugated fibers, and the like. The nonwoven fabric may be manufactured by any process. For example, spun lace nonwoven fabric, spunbond nonwoven fabric, SMS nonwoven fabric, meltblown nonwoven fabric, needle punch nonwoven fabric, thermal bond nonwoven fabric, air through nonwoven fabric, point bond nonwoven fabric, It is preferable since it is excellent in adhesion with the elastic member. When a nonwoven fabric is used, the basis weight thereof is preferably 10 to 40 g / m 2, particularly 10 to 22 g / m 2 or so.

The two folding portions 21 and 22 of the two outer sheets 12F and 12B are fixed to the opposite outermost portions by a hot melt adhesive or the like and at the same time, Elongated elastic stretchable members 15 to 19 such as thread rubber are sandwiched and fixed in a predetermined elongation state between the end portions 21 and 22 and the outermost portion opposed thereto. As the elongate elastic stretchable members 15 to 19, natural rubber may be used even if synthetic rubber is used. Hot melt bonding or heat sealing or ultrasonic bonding may be applied to the bonding of the sheet-like breathable materials 12 and 12 in the respective outer sheets 12F and 12B and the fixing of the elongate elastic stretchable members 15 to 19 sandwiched therebetween Can be used. When the front surfaces of the outer sheets 12F and 12B are firmly fixed, the tactile sensation of the sheet is deteriorated. It is preferable to combine these to make the elastic elongate and contractible members 15 to 19 strong and the other portions not to be adhered or weakly adhered.

More specifically, the back side outer sheet 12B includes an isosceles body portion 13 occupying the same vertical range as the side seal portion 12A by the bonded portion group, Side extending portion 14 that extends toward the rear end portion of the vehicle. The shoulder extended portion 14 has a widthwise central portion 14M overlapping the inner body 200 and a hip cover portion 14C extending to both sides thereof.

The shape of the isosceles extended portion 14 can be appropriately determined and is rectangular in the example shown in Figs. 1 to 10, but as shown in Figs. 18 and 19, It may be cut to a shape such that it extends to the lower side of the shoulder-side main body portion 13 with the same width as that of the main body portion 13, and the lower side thereof becomes narrower as it approaches the higher side. In addition, a portion having the same width as the shoulder-side main portion 13 may be omitted. With this configuration, the outer edge 14e of the buttock cover portion 14C becomes linear or curved so as to be closer to the inner body 200 side as it gets closer to the high-end side, The shape of the time becomes beautiful.

6, the length 14x of the hip cover portion 14C in the width direction (the outer edge 14e of the buttock cover portion 14C) is smaller than the widthwise length 14x of the hip cover portion 14C (The maximum separation distance in the width direction from the side edge of the inner body 200) is 80 to 160 mm and the length 14y (extended length) in the vertical direction of the buttock cover portion 14C is 30 to 80 mm Do. 18 and 19, in the case where the outer edge 14e of the buttock cover portion 14C is formed in a curved shape, the width of the widest portion in the width direction of the back side extending portion 14 and the width When the area of the square defined by the wide area is S, it is appropriate that the area of the back side extensions 14 is about 20 to 80%, particularly about 40 to 60%, with respect to S.

The back side body portion 13 is conceptually divided into an upper portion (waist portion) W and a lower portion U which is lower than the upper portion (waist portion) in the vertical direction. The range is different depending on the product size, The vertical length of the lower portion U may be 15 to 80 mm and the vertical length of the lower portion U may be 35 to 220 mm.

Side waist portion 21 (the innermost face portion) and the outermost face portion of the sheet-like breathable material 12 at the waist side end portion W, which is the upper end portion of the back side body portion 13, A plurality of isosceles back waist elastic stretchable members 17 are fixed in a state of being elongated along the width direction at a predetermined elongation rate at intervals in the up and down direction. One or more lines provided in the region adjacent to the lower side portion U of the back side elastic member 17 may be overlapped with the internal side body 200, It may be formed on both sides in the width direction except for the widthwise central portion overlapping with the body 200. [ In the example shown in the figure, the upper portion of the back side elastic elastic member 17 is disposed between the inner body 200 and the outermost portion of the elastic member 320. However, even when the elastic member 320 is disposed between the inner body 200 and the waist- good. As the back side elastic elastic member 17, a thread rubber having a thickness of about 300 to 1,240 dtex, particularly about 470 to 940 dtex, is stretched by about 3 to 22 lines at an interval of 4 to 12 mm, an elongation of 150 to 400% To about 320%. It is not necessary that all of the elastic members 17 on the back side of the back waist portion have the same thickness and elongation. For example, the thickness and the elongation of the elastic stretchable member may be different in the upper and lower portions of the back waist portion.

In the waist-surrounding portion U, which is the lower portion of the shoulder-side main body portion 13, the height of the hip-side-side folding portion 22 in the sheet-like breathable material 12 in the waist- A plurality of first elongated rectangular shapes are formed between the outer side surface portion and the outermost surface portion so as to be continuous throughout the width direction at respective portions on the upper side and both sides in the width direction except the widthwise central portion overlapping with the inner body 200. [ The elastic stretchable member 15 is fixed in a state of being elongated along the width direction at a predetermined elongation rate while being spaced apart in the vertical direction.

As the first elongated elastic stretchable member 15, yarn rubbers having a thickness of about 300 to 1,240 dtex, particularly about 470 to 940 dtex, of about 5 to 30 lines at intervals of 1 to 15 mm, particularly 3 to 8 mm, Preferably about 200 to 350%, particularly about 240 to 300%.

In the shoulder extended portion 14, a widthwise central portion overlapping the internal body 200 is formed between the high-end-side folded portion 22 (innermost portion) and the outermost portion of the sheet-like breathable material 12 , A plurality of second elongate elastic stretchable members 16 are spaced apart in the up-and-down direction so as to be continuous over the entire width direction (at least over the entire buttock cover portion 14C) While being stretched along the width direction at a predetermined elongation percentage.

As the second elongated elastic stretchable member 16, yarn rubbers having a thickness of about 300 to 1,240 dtex, particularly about 470 to 940 dtex, of about 2 to 10 lines at intervals of 5 to 40 mm, particularly 5 to 20 mm, 150 to 300%, particularly preferably 180 to 260%.

On the other hand, the back side outer sheet 12F is a portion of the back side body portion (occupying the same upper and lower range as the side side seal portion 12A by the bonded portion clusters) basically the same as the back side body portion 13 of the back side outer sheet 12B. And it has a rectangular shape extending along the waist-surrounding direction and does not have the shoulder extended portion 14 like the back side outer sheet 12B.

That is, the sheet-like breathable material 12 is provided at the waist side end W, which is the upper end of the back side external sheet (the diving main body) 12F, and the waist side end W among the waist- Between the waist side folding portion 21 (innermost face portion) and the outermost face portion of the back waist elastic stretchable member 18 in the longitudinal direction, And is fixed in a state elongated along the width direction at an elongation rate of. The back waist elastic stretchable member 18 is preferably arranged as close as possible to the number, thickness, elongation, spacing, and vertical arrangement of the back waist elastic stretchable member 17, but it may be different The difference in the number is not more than 6 lines, preferably not more than 3 lines, the difference in thickness is not more than 450 dtex, preferably not more than 300 dtex, the difference in elongation percentage is not more than 100%, preferably not more than 40% The car is 10 mm or less, preferably 5 mm or less.

In the waist-surrounding portion U of the back side outer sheet 12F (back side main body portion), the hip side side fold portion 22 (the innermost side portion) of the sheet-like air permeable material 12 at the waist- And a plurality of third elongated elastic members (not shown) are provided between the upper surface and the outermost surface portion of the inner body 200 so as to be continuous over the entire width direction, The elastic members 19 are fixed in a state of being elongated along the width direction at a predetermined elongation rate while being spaced apart in the vertical direction. The upper and lower directional arrangement range of the third elongated elastic expansion and contraction member 19 may be a part of the lower side portion, but it is preferable that the entirety of the third elongated elastic expansion and contraction member 19 is substantially entirely (a range in which the expansion and contraction force acts on the whole).

As the third long elongate elastic stretchable member 19, it is preferable to make the number, thickness, elongation, spacing, and vertical arrangement of the third elongated elastic stretchable member 19 as close as possible to the first elongate elastic stretchable member 15, , The difference in the number is not more than 10 lines, preferably not more than 5 lines, the difference in thickness is not more than 450 dtex, preferably not more than 300 dtex, the difference in elongation percentage is not more than 100%, preferably not more than 40% 10 mm or less, preferably 5 mm or less.

Characteristically, the waist-surrounding upper end portion U1 and the waist-surrounding intermediate portion U2 of the back side outer sheet 12F and the back side outer sheet 12B are composed of a single sheet of the air-permeable material 12 And a thin layer portion 23 which does not have an elastic stretchable member and an adhesive for fixing the elastic stretchable member. In this structure, as can be seen from the material lamination structure of the side seal portion 12A shown in Fig. 10 (b), the waist circumference of each of the back side outer sheet 12F and the back side outer sheet 12B Since the number of layers of the sheet-like breathable material 12 is one, the upper end U1 and the waist-surrounding middle portion U2 have improved breathability and flexibility of the outer sheets 12F and 12B. Further, in the illustrated embodiment, the number of laminated sheet-like breathable materials 12 at the waist side end of the side seal portion 12A and the number of laminated sheet-like breathable materials 12 at the high- And the number of laminated sheets of the sheet-like breathable material 12 in the intermediate portion between the waist side end portion and the high-gap side end portion is less (two sheets). Therefore, only by forming the side seal evenly in the side seal portion 12A, the bonding strength between the waist side end portion of the side seal portion 12A and the sheet-like air permeable material 12 at the high-gap side end portion is made substantially equal It is easy to make the side seal portion 12A strongest among the portions of the side seal portion 12A. The waist side end portion and the high-gap side end portion of the side seal portion 12A are a portion to which a particularly strong force is applied during mounting but are a starting point or an end point for pulling off and peeling off the middle portion of the side seal portion 12A. If it is configured as described above, it is easy to peel off after use, without unintentional peeling of the side seal portion 12A during the mounting, since smooth peeling is required (stronger than the starting point and ending point is not preferable) . On the contrary, in the conventional configuration shown in Fig. 20, the number of sheets of the air-permeable sheet 12 at the waist side is six, and the number of sheets of the air-permeable sheet 12 at the high- , It is difficult to obtain the above effect.

The length of the thin layer portion 23 in the up-and-down direction can be properly determined, but if the length is excessively long, the portion where the elastic stretchable members 15 to 19 can be formed is reduced, Is preferably about 1/20 to 1/8 of the length (length in the forward and backward directions in the expanded state).

Here, as in the above example, both the waist-surrounding intermediate portion U2 of the dorsal outer-layer sheet 12F and the waist-surrounding middle portion U2 of the back-side outer-layer sheet 12B do not have elastic elastic members, (Or when the rear outer layer sheet 12F as described below has the rear extension portion), the contraction force of the rear extension portion is larger than the contraction force of the back extension portion 14 in the case where the front extension 14 has the second elongate elastic elastic member 16 The balance of the contraction force between the back side and the back side with the side seal portion 12A as a boundary is broken and the lower side of the side seal portion 12A is tilted toward the back side As shown in Fig. 27, the side seal portions 12A of the back side external sheet 12B and the back side external sheet 12B are shifted toward the back side as they are used, This discrepancy causes There is a fear that swollen or curled up in the hind paw cover portion 14C may occur.

In order to avoid such a phenomenon, the retracting force of each of the elongate elastic stretchable members 18, 19 of the backrest outer sheet 12F and the retracting force of the elongate elastic stretching members 15 to 17 of the back side outer sheet 12B Is preferably balanced so that the side seal portion has an inclination angle of 20 degrees or less, particularly preferably 10 degrees or less, and more preferably 5 degrees or less, in balance with the joining portion 12A as a boundary. Specifically, the contracting force in the width direction at the waist-surrounding lower end portion U3 of the back side outer layer sheet 12F is set equal to the contractive force in the width direction at the waist-side lower end portion U3 of the back side outer sheet 12B, 19 of the back side outer sheet 12F and the contractive force of the elongate elastic stretchable members 18, 19 of the back side outer sheet 12B are made stronger than the retracting force of the elongate elastic sheet members 14, 15 to 17 are balanced with each other with the joining portion 12A as a boundary so that the tilt angle of the side seal portion becomes small and it is possible to prevent the rising and swelling of the buttock cover portion 14C . On the other hand, the "angle of inclination of the side seal portion" and the "retraction force" are as described above.

On the other hand, the rear outer sheet 12F shown in the figure is made up only of the portion occupying the same upper and lower range as the side seal portion 12A. However, similarly to the back side, And a rear extension extending downwardly from the rearward main body portion. As a result, the shape of the leg circumference of the back side external sheet 12F can be made to fit along the inguinal region. In this case, the area of the back extension and the longitudinal length are preferably 10 to 80%, more preferably 20 to 50% of the area of the back extension and the longitudinal length. If the dumbbell extension is excessively large, it is rather undesirable because it damages the fitability.

As shown in the drawing, the first, second, and third elongate elastic stretchable members 15, 16, and 19 are formed on both sides in the width direction except the widthwise central portion overlapping with the inner body 200 It is preferable that the inner body 200 and the outer sheets 12F and 12B are not peeled off easily. However, in this embodiment, in addition to the form in which elastic elastic members are present only on both sides in the width direction, Elastic elastic members are present from one side to the other in the width direction, but the elastic elastic members are cut off at the widthwise central portion overlapping with the inner body 200, so that the elastic members are not applied (substantially no elastic elastic members are formed The same shall apply). In addition, a part or all of the first, second and third elongate elastic stretchable members 15, 16 and 19 are arranged in such a manner that a stretching force acts across the entire width direction of the back side body portion 13 and the back side extending portion 14. [ It is possible to extend from one side in the width direction to the other side across the inner body 200.

(Interior)

The inner body 200 may have any shape, but is rectangular in the illustrated form. As shown in Fig. 3, the inner body 200 is provided with a topsheet 30, which is the body side, a liquid-impermeable sheet 11, and an absorbent element 50 interposed therebetween. The liquid impervious sheet 11 is provided on the back side of the liquid impervious sheet 11 so as to cover the entire back surface of the inner body 200 or to cover the whole portion exposed between the back side outer sheet 12F and the back side outer sheet 12B 12M may be fixed. An intermediate sheet (second sheet) 40 is formed between the topsheet 30 and the absorbent element 50 to quickly transfer the liquid permeated through the topsheet 30 to the absorbent element 50 . In addition, barrier cuffs 60 and 61 standing up toward the body can be provided on both sides of the inner body 200 in order to prevent the excretion from leaking to both sides of the inner body 200. On the other hand, although not shown, the constituent members of the inner body 200 can be appropriately fixed to each other by betas, beads, or spiral coatings, such as hot melt adhesives. Also, the inner body 200 can be detachably attached to the outer sheets 12F, 12F using a mechanical fastener or an adhesive material.

On the other hand, in the vicinity of the intersection between the widthwise opposite side portions of the inner body 200, in particular, between the side edges in the width direction of the inner body 200 and the lower edge of the back side outer sheet 12F and the lower edge of the back side outer sheet 12B If the rigidity (strength) of the inner body 200 is 15 to 50 cN / 50 mm, particularly 20 to 35 cN / 50 mm, in the vicinity of the intersection, the overall rising shape of the barrier cuffs 60 and 61 So that it is preferable. On the other hand, it is preferable that the rigidity is lowered to 5 to 35 cN / 50 mm, preferably 10 to 25 cN / 50 mm, in consideration of the flexibility in other portions, for example, in the widthwise middle portion. On the other hand, the range of increasing the rigidity is in the range of 5 to 30 mm from the side edges in the width direction of the inner body 200 to the center in the width direction and the inner body 200 and the back side outer sheet 12F, It is preferable that the distance is 50 mm or less (the portion overlapping with the narrowed portion 56N of the absorber 56 is not included) in the forward and backward directions at the intersection of the back side outer sheet 12B.

The rigidity (strength) is measured by the following method in accordance with JIS K 7171 (test method for plastic-bending stiffness). The bending rigidity of the inner body 200 in the longitudinal direction of the product is measured using a tensilon tester (radius of curvature R1 of the indenter end R1 = 5.0 ± 0.1 mm, radius of curvature R2 of the support plate front end = 5.0 ± 0.2 mm) . The test piece is produced by removing the elastic stretchable member that affects the measurement from the inner body 200 and cutting it into a rectangular shape of 80 mm in the length of the diaper and 50 mm in the width of the diaper. 50 mm in the bending stiffness value unit is the length of the short side of the test piece, and is the width of the test piece deformed by the indentor at the time of testing. On a pair of support plates arranged in parallel with each other and at the height positions of both tip ends, each of which had a tip end having an arc-shaped section and spaced apart from each other at the tips (upper ends) of both tip ends by 50 mm, Is placed in such a manner that its longitudinal direction is directed in a direction orthogonal to each plate, and the indenter end is disposed so as to slightly contact with the test piece. The indenter is lowered under the conditions of a load cell of 5 kg (range 196 cN) and a speed of 30 mm / min to obtain a load-deflection curve. The maximum value of the obtained bending stress is defined as a bending stiffness value (cN / 50 mm). On the other hand, when the portion to be measured is smaller than the above-mentioned sampling dimension, the measurement is made with a test piece of a small scale and converted into proportional calculation based on the dimensional ratio.

(Surface sheet)

The topsheet 30 has a property of transmitting liquid, and examples thereof include a nonwoven fabric having a hole or a nonporous hole, a porous plastic sheet, and the like. The non-woven fabric among them is not particularly limited as to the raw fiber. For example, synthetic fibers such as olefins, polyesters and polyamides such as polyethylene and polypropylene, regenerated fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers obtained by using two or more thereof , Conjugated fibers, and the like. The nonwoven fabric may be manufactured by any process. Examples of the processing method include a known method such as a spun lace method, a spun bond method, a thermal bond method, a meltblown method, a needle punch method, an air through method, a point bond method and the like. For example, the spun bond method and the spun lace method are preferable as long as they require flexibility and drape property, and the air through method, the point bond method and the thermal bond method are preferable processing methods as far as they require volatility and softness.

The topsheet 30 may be composed of a single sheet or a laminated sheet obtained by adhering two or more sheets together. Similarly, the topsheet 30 may be composed of one sheet or two or more sheets in the planar direction.

Both sides of the topsheet 30 are passed between the liquid impervious sheet 11 and the barrier cuffs 60 and 61 to form the barrier cuffs 60 and 61 to the back surface of the absorbent element 50 The liquid impermeable sheet 11 and the barrier cuffs 60 and 61 are preferably adhered to each other with a hot melt adhesive or the like in order to prevent the penetration of the liquid. Thereby, it is possible to obtain an effect that the rigidity of both side portions of the inner body 200 is improved.

(Intermediate sheet)

An intermediate sheet 40 (also referred to as a &quot; second sheet &quot;) having a liquid permeation rate higher than that of the topsheet 30 can be formed in order to quickly transfer the liquid permeated through the topsheet 30 to the absorber . This intermediate sheet 40 not only improves the absorbing performance of the absorbent body by quickly transferring the liquid to the absorbent body but also prevents the absorbed liquid from "reversing back" from the absorbent body, It can be always dry. The intermediate sheet 40 may be omitted.

Examples of the intermediate sheet 40 include the same material as the topsheet 30, spun lace, spunbond, SMS, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bond, or crepe paper. In particular, the air-through nonwoven fabric is preferable because it is bulky. The air-through nonwoven fabric preferably uses a core-sheath structure conjugate fiber. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. The basis weight is preferably 20 to 80 g / m 2, more preferably 25 to 60 g / m 2. The thickness of the raw fiber of the nonwoven fabric is preferably 2.2 to 10 dtex. In order to increase the volume of the nonwoven fabric, it is also preferable to use eccentric fibers, hollow fibers, and eccentrically hollow fibers that are not in the center at all, as mixed fibers of all or part of the raw fibers.

Although the intermediate sheet 40 shown in the figure is disposed at the center at a shorter width than the width of the absorbent body 56, it may be formed over the entire width. The length in the longitudinal direction of the intermediate sheet 40 may be the same as the length of the absorbent body 56 or may be within a short length range centered on a region for receiving the liquid. The rigidity of both side portions of the inner body 200 is improved if the intermediate sheet 40 is formed from the side in the width direction to the back side of the absorbent body 56 and is adhesively fixed with a hot melt adhesive or the like. A typical material of the intermediate sheet 40 is a nonwoven fabric having excellent liquid permeability.

(Liquid impervious sheet)

The material of the liquid impervious sheet 11 is not particularly limited, but a film material (waterproof film) made of an olefin resin such as polyethylene or polypropylene, a laminate nonwoven fabric in which a nonwoven fabric is laminated on a polyethylene sheet, (In this case, a liquid-impervious sheet is constituted of a waterproof film and a nonwoven fabric) and the like can be given as examples of the nonwoven fabric. Of course, it is also possible to exemplify a liquid-permeable and moisture-permeable material which is preferentially used in recent years from the viewpoint of prevention of smoldering. Examples of the liquid-impervious sheet having a moisture-permeable material include a sheet obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, stretching the sheet in a uniaxial or biaxial direction, For example. In addition, the non-woven fabric using micro denier fibers, the leakage preventing property by reducing the pores of the fibers by applying heat or pressure, and the method of coating the water absorbent resin or hydrophobic resin or water repellent agent, The permeable sheet can also be used as the liquid-impermeable sheet 11.

It is preferable that the liquid impervious sheet 11 is extended to both sides of the side surface of the topsheet 30 of the absorbent element 50 by moving both sides of the absorbent element 50 in order to enhance leakage prevention. Thereby, it is possible to obtain an effect that the rigidity of both side portions of the inner body 200 is improved. The width of the extended portion is preferably about 5 to 20 mm on each side.

The inner surface or the outer surface of the liquid impervious sheet 11 may be designed by printing or coloring. Further, a printed or colored design sheet, which is a member separate from the high-sheath external sheet 12M, may be adhered to the outside of the liquid-impermeable sheet 11. [ In addition, an extinguishant indicator 80 can be formed inside the liquid-impermeable sheet 11, the color of which is changed by the absorption of the liquid component.

(Barrier cuff)

The barrier cuffs 60 and 61 are belt-like members extending in the entire front-rear direction along both side portions of the inner body 200 and block the urine or loose side moving in the lateral direction along the topsheet 30 , To prevent sideways leakage.

In this embodiment, as shown in Figs. 3 and 4, the barrier cuffs 60 and 61 are formed on the left and right sides of the inner body 200, respectively. The inner barrier cuffs 61 rise obliquely from the sides of the inner body 200 toward the center in the width direction and the outer barrier cuffs 60 are folded toward the inner barrier cuffs 61 Side portion of the inner body 200 obliquely rising toward the center in the width direction while the portion of the distal end side of the middle portion of the inner body 200 rising from the side of the inner body 200 obliquely rising toward the outside in the width direction .

More specifically, the inner barrier cuff 61 overlaps the barrier sheet 62 in a strip-like shape having a length equal to the length in the front-back direction of the inner body 200 while folding back the barrier sheet 62 in the width direction, And a plurality of elongated elastic stretchable members 63 are fixed between the adjacent sheets in a stretched state along the longitudinal direction and at intervals in the transverse direction. The elongate elastic stretchable member 63 is not fixed to the barrier sheet 62 at its front and rear ends, but is fixed so that the barrier cuff extends and retracts forward and backward in the intermediate portion. As the barrier sheet 62, a nonwoven fabric having excellent flexibility, uniformity, and hiding properties such as spunbonded nonwoven fabric (SS, SSS, etc.), SMS nonwoven fabric (SMS, SSMMS and the like), melt blown nonwoven fabric, Can be suitably used, and the fiber basis weight is preferably about 10 to 30 g / m 2. As the elongate elastic stretchable member 63, a thread rubber or the like can be used. When a spandex yarn rubber is used, the thickness is preferably 470 to 1240 dtex, and more preferably 620 to 940 dtex. The elongation at the time of fixation is preferably 150 to 350%, more preferably 200 to 300%. Further, although not shown, a waterproof film may be interposed between barrier sheets which are piled up in two.

It is preferable that the elongated elastic stretchable member 63 is arranged at one or two lines at the tip end portion of the inner barrier cuff 61 and one or two lines are arranged at the middle portion between the tip end portion and the base end portion. When the elongated elastic stretchable member 63 is provided at the intermediate portion, it is easy to contact the skin with respect to the skin in the range extending from the intermediate portion to the distal end portion. The arrangement position of the elongated elastic stretchable member 63 at the middle portion is preferably in the range of 30 to 70% of the height of the inner barrier cuff 61 (length in the width direction of the protruding portion). Since the height of the inner barrier cuffs 61 is preferably about 15 to 35 mm in the case of a baby diaper, the arrangement range of the elongate elastic stretchable member 63 is preferably 5 to 25 mm from the tip end to the proximal end side, A position of ~ 18 mm is more preferable. When the elongated elastic stretchable members 63 are formed parallel to the distal end portion and / or the middle portion of the inner barrier cuff 61, the arrangement interval 61d is preferably 2 to 10 mm, more preferably 2 to 6 mm Is more preferable.

The end portion of the inner barrier cuff 61 opposite to the folded portion in the width direction is an attachment portion (inner attachment portion) 65 fixed to the back surface of the side edge of the inner body 200, 65 are formed as projecting portions 66 (corresponding to the folding portion side and corresponding to the inner projecting portions) projecting from the attaching portion 65 and both ends of the projecting portions 66 in the front- (Front-rear direction) middle portion is defined as a free-form defining portion (innermost free portion), and the free portion is fixed to the surface of the base 30 by a hot-melt adhesive or a heat- The member 63 is fixed in a stretched state.

The outer barrier cuff 60 has a structure basically the same as that of the inner barrier cuff 61. The outer barrier cuff 60 has an attachment portion (outer attachment portion) (Outer projecting portion) 69 is fixed to the outer surface of the inner barrier cuff 61 on the center side in the width direction of the attaching portion 65 of the attachment portion 68, To the front and rear ends of the inner projecting portion 66 of the inner barrier cuff 61 through the side of the inner body 200 and to the surface of both ends of the inner projecting portion 66 in the front- And a distal end side portion fixed to the bottom side portion while being folded back outward in the width direction from the tip end of the bottom side portion. The arrangement and number of the elongate elastic stretching members 63 are different.

However, the inner barrier cuff 61 also has a structure in which the tip end portion of the inner projected portion is folded outward in the width direction, specifically, a half or less of the height of the inner barrier cuff 61 (the length in the width direction of the projected portion) It is also possible to adopt a structure in which the tip side portion is fixed to the bottom side portion while folding back toward the outside in the width direction as in the case of the outer barrier cuff 61. [

The number of elongate elastic stretching members 63 provided at the free portion (outer free portion) of the outer barrier cuff 60 is preferably 2 to 6 lines, more preferably 3 to 5 lines. The arrangement interval 60d is preferably 3 to 10 mm. With this configuration, it is easy to make contact with the skin surface in a range in which the elongate elastic stretchable member 63 is arranged. The elongate elastic stretchable member 63 may be disposed not only on the front end side but also on the base end side. Thickness and extension ratio of the elongated elastic stretchable member 63 disposed in the outer barrier cuff 60 are the same as the thickness of the inner barrier cuff 61 but the thickness is the same as or thicker than that of the inner barrier cuff 61, It is preferable that the extension ratio is equal to or lower than the extension ratio of the inner barrier cuffs 61.

The longitudinal length L6 of the front and rear fixing portions 67 of the protruding portions 66 and 69 is preferably equal to or shorter than that of the outer barrier cuffs 60 And the longitudinal length of the elongate elastic stretchable member 63 in the barrier cuffs 60 and 61 is equal to or longer than the length of the inner barrier cuffs 61 . The boundary between the attachment portion 65 and the protruding portion 66 may be the same at the outer barrier cuff 60 and the inner barrier cuff 61. The boundary between the outer barrier cuff 60 and the inner barrier cuff 61, It is preferable to be spaced apart from the boundary toward the center in the width direction, and the spacing distance is preferably within 10 mm.

A linear base fixed portion formed by a hot melt adhesive or a heat seal is formed on the edge portions on the side of the projecting portions 66 and 69 of the attachment portions 68 and 65 of the outer barrier cuff 60 and the inner barrier cuff 61 . The other fixing portion can be fixed in a suitable pattern by using a hot-melt adhesive or the like. This linear base fixed portion is located near the side of the front surface side of the inner body 200 (specifically, at a position of 0 to 5 mm, preferably 0 to 3 mm in the width direction from the side edge) desirable. In this case, since the barrier cuffs are folded back to the front side and only the forward and backward direction ends are substantially provided, in the crotch portion in which the restriction on the widthwise center side by the front and back fixing portion 67 does not sufficiently act, Both the cuff 60 and the inner barrier cuff 61 stand up in the width direction outward and the pockets formed by the inner barrier cuffs 61 are widened. If the linear base fixed portion is located beyond 5 mm in the width direction from the side edge on the front surface side, the barrier cuffs also rise in the middle in the width direction and the pockets formed by the inner barrier cuffs 61 become narrow Therefore, it is not preferable. In the case of being located on the back side, the position of 0 to 20 mm from the side edge of the inner body 200 is suitable, but it may be located beyond 20 mm.

The objects to be fixed to the attachment portions 68 and 65 of the outer and inner barrier cuffs 60 and 61 are the surface sheet 30, the liquid impervious sheet 11, the absorbent element 50, And the other barrier cuff may be fixed to the inner body 200 through one of the barrier cuffs.

In the thus configured outer and inner barrier cuffs 60 and 61, the contracting force of the elongate elastic stretchable member 63 acts to bring both ends in the front-back direction close to each other, but the both ends of the projecting portions 66, However, since these portions are defined as free-form free portions, only the free portion is erected so as to come into contact with the body side as shown in Fig. Particularly, if the attachment portions 68 and 65 are located on the back side of the inner body 200, since the outer and inner barrier cuffs 60 and 61 rise up in the crotch portion and its vicinities to open outward in the width direction, And the inner barrier cuffs 60 and 61 are brought into contact with the legs around the legs, thereby improving fitability. On the other hand, since the front and rear fixing cuffs 67 and 60 prevent the outer and inner barrier cuffs 60 and 61 from being opened outward in the width direction on the front and rear sides (abdomen and back) And the lower half portion of the outer barrier cuff 60 similarly stands up. Therefore, it is possible to reliably prevent the inner portion of the inner body 200 from leaking into the abdomen portion and the back portion. The front and rear fixing parts 67 of the protruded parts 68 of the inner barrier cuffs 61 do not come close to each other and the front and back fixing parts 67 of the outer barrier cuffs 60 The outer and inner barrier cuffs 60 and 61 are spaced apart from each other so that the outer and inner barrier cuffs 60 and 61 are securely raised And each of them is fitted around the legs, so that the leak-proof property is excellent.

The dimensions of the barrier cuffs 60 and 61 can be appropriately determined. In the case of a baby diaper, for example, as shown in Fig. 7, the rising height of the inner barrier cuff 61 (the protruding portion (The width direction length of the projecting portion 69 in the expanded state) of the outer barrier cuffs 60 is preferably 10 to 50 mm, particularly 15 to 35 mm, ) W6 is preferably 15 to 60 mm, and more preferably 20 to 40 mm. The distance W4 between the tips of the inner barrier cuffs 61 in the state of being tumbled to the surface of the topsheet 30 is preferably 60 to 170 mm, more preferably 70 to 120 mm. The separation distance W3 between the folding lines located on the innermost side in a flat folded state so as to be parallel to the surface of the topsheet 30 is 60 to 190 mm, mm.

On the other hand, only one of the outer and inner barrier cuffs 60 and 61 may be formed unlike the illustrated one.

(Absorption element)

The absorbent element 50 has an absorbent body 56 and a wrapped sheet 58 surrounding at least the back and sides of the absorbent body 56. The perforation sheet 58 may be omitted.

(Absorber)

The absorber 56 may be formed of an aggregate of fibers. As the fibrous aggregate, a filament aggregate obtained by integrating short fibers such as planar pulp and synthetic fibers, as well as tows (fiber bundles) of synthetic fibers such as cellulose acetate, if necessary, Can be used. The fiber basis weight can be set to, for example, about 100 to 300 g / m 2 when the surface-type pulp or the short fiber is laminated, and about 30 to 120 g / m 2 for the filament aggregate. In the case of synthetic fibers, the fineness is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 5 dtex. In the case of a filament aggregate, the filament may be non-crimped fiber, but is preferably a crimped fiber. The degree of crimp of the crimped fiber can be, for example, about 5 to 75, preferably 10 to 50, and more preferably about 15 to 50 per inch. In addition, there are many cases where uniformly crimped crimped fibers are used. It is preferable that the absorbers 56 disperse and retain the superabsorbent polymer particles.

6, the front end portion 56F and the rear end portion 56B are located between the front end portion 56F and the rear end portion 56B. The absorbent body 56 may be in a rectangular shape, It is preferable to form an hourglass shape having a narrow narrowed portion 56N because the padding of the absorber 56 itself and the barrier cuffs 60 and 61 around the legs is improved. Specifically, the length in the fore and aft direction of the front end portion 56F of the absorber 56 is L1, the length in the forward and backward direction in the overlapping portion of the absorber 56 and the back side outer sheet 12F is L2, L3 is the length in the forward and backward direction of the absorbent body 56 and L3 is the length in the anteroposterior direction of the overlapped portion between the absorbent body 56 and the back side external sheet 12B and W1 is the minimum width of the narrowed portion 56N, (1) to (4) below when the width of the portion 56F and the width of the rear end portion 56B of the absorbing body are W2.

70 mm? W 1 <W 2? 190 mm ... (One)

0.5? W1 / W2? 0.85? (2)

0 mm? L1-L2? 70 mm ... (3)

0 mm? L3-L4? 50 mm ... (4)

If W1 and W2 are too narrow, the standing up of the barrier cuffs 60 and 61 becomes unstable and the amount of water absorption becomes insufficient.

In the above range, since the absorber 56 does not exist in the vicinity of the attachment portion 65 of the barrier cuffs 60 and 61, the degree of freedom of movement of the barrier cuffs 60 and 61 increases , The barrier cuffs (60, 61) are likely to be opened outward in the width direction, and it is easy for the barrier cuffs (60, 61) to come into contact with the skin with respect to the skin. Since the absorber 56 on the side of the inner body 200 is present in a sufficient range on the front and rear sides, the standing of the barrier cuffs 60 and 61 is stabilized with this being the starting point. The portions from the front and back sides to the crotch portion are displaced portions that open toward the width direction in a posture in which the barrier cuffs 60 and 61 stand inward in the width direction with both side edges in the width direction of the inner body 200 as a starting point, The change in attitude of the barrier cuffs 60 and 61 is supported by the absorber 56 existing up to the side of the inner body 200 and the overall standing shape of the barrier cuffs 60 and 61 is stabilized. If the constricted portion is too large beyond the above-mentioned numerical range, the degree of freedom of the barrier cuffs 60 and 61 in the crotch portion becomes too high, and there is a fear that a gap is likely to be formed around the leg cuffs. There is a fear that the standing of the barrier cuffs 60 and 61 becomes unstable. Conversely, if the constricted portion becomes too small, the degree of freedom of the barrier cuffs 60, 61 is lowered.

Further, the length L7 in the fore and aft direction of the entire constricted portion 56N is preferably 80 mm or more, particularly preferably 120 to 260 mm. If the longitudinal length L7 of the constricted portion 56N is too short, the degree of freedom of the barrier cuffs 60 and 61 is lowered and the fitability of the absorbent body 56 to the leg-holes is lowered, And if it is too long, the barrier cuffs 60 and 61 do not stand upright.

(Superabsorbent polymer particles)

The superabsorbent polymer particles include &quot; powder &quot; in addition to &quot; particle &quot;. The particle diameter of the superabsorbent polymer particles can be as it is used for the absorbent article of this kind, and it is preferably 1000 占 퐉 or less, particularly 150 to 400 占 퐉. The material of the superabsorbent polymer particles can be used without any particular limitation, but it is preferable that the absorption amount is 40 g / g or more. Examples of the superabsorbent polymer particles include starch-based, cellulose-based and synthetic polymer-based ones. Examples of the superabsorbent polymer particles include starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, crosslinked product of sodium carboxymethylcellulose, (Salt) polymer, and the like. As the shape of the superabsorbent polymer particles, a generally used particulate form is preferable, but other shapes can also be used.

As the superabsorbent polymer, those integrated with an antibacterial substance can be used. Particularly, zeolite particles (hereinafter referred to as "antibacterial and deodorant zeolite") formed by substituting a part or all of ions capable of ion exchange in zeolite with silver ions are contained in the superabsorbent polymer, or the antibacterial and deodorant zeolite particles are highly absorbent Absorbing polymer particles formed by adhering the polymer particles to the surface of the polymer particles by electrostatic force are suitable.

As the superabsorbent polymer particles, those having an absorption rate of 40 seconds or less are suitably used. When the absorption speed exceeds 40 seconds, the liquid supplied into the absorber 56 is easily returned to the absorber 56, which is a so-called reversed state.

As the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are suitably used. Thereby, even when the absorber 56 having a large volume is used, the feeling of stickiness after absorbing the liquid can be effectively suppressed.

The basis weight of the superabsorbent polymer particles can be appropriately determined in accordance with the amount of absorption required for the use of the absorber 56. [ Therefore, it can be 50 to 350 g / m &lt; 2 &gt; although it can not be said uniformly. If the basis weight of the polymer is less than 50 g / m &lt; 2 &gt;, it becomes difficult to secure the amount of absorption. If it exceeds 350 g / m 2, the effect becomes saturated.

If necessary, the superabsorbent polymer particles can adjust the spraying density or the spraying amount in the planar direction of the absorber 56. For example, the excreted portion of the liquid can be sprayed more than other portions. When male and female differences are taken into consideration, it is possible to increase the spraying density of the front side for men and increase the spraying density of the middle part for women. It is also possible to place a portion in which the polymer does not exist locally (for example, in the form of a spot) in the planar direction of the absorber 56.

(Poppy sheet)

In the case of using the perforated sheet 58, a paper material such as tissue paper or crepe paper, a nonwoven fabric, a polyethylene laminate nonwoven fabric, a sheet having small holes, or the like can be used. However, it is preferable that the sheet does not allow the superabsorbent polymer particles to escape. When a nonwoven fabric is used in place of the crepe paper, a hydrophilic SMMS (spunbond / meltblown / meltblown / spunbond) nonwoven fabric is particularly suitable, and the material thereof may be polypropylene, polyethylene / polypropylene or the like. The basis weight is preferably 5 to 40 g / m 2, particularly preferably 10 to 30 g / m 2.

As shown in Fig. 2, the perforated sheet 58 may be formed by surrounding only the back surface and the side surface of the absorbent body 56 in addition to the form surrounding the absorbent body 56 as a whole. Although not shown, the upper surface and the side surface of the absorbent body 56 are covered with a crepe or nonwoven fabric, the lower surface is covered with a liquid-impermeable sheet such as polyethylene, the upper surface of the absorbent body 56 is covered with a crepe or nonwoven fabric, Impermeable sheet such as polyethylene or the like (each of these materials constitutes a constituent element of the poppy sheet). If necessary, the absorber 56 may be disposed only on the bottom or bottom surface between the upper and lower two-layered sheets, but it is difficult to prevent the migration of the superabsorbent polymer particles.

(High executive outer sheet)

On the back side of the inner body 200, a high-sheath outer sheet 12M exposed to the outer surface of the product is formed. As the material of the high sheath outer sheet 12M, the same materials as those of the back outer sheet 12F and the back outer sheath 12B can be used. However, the outer sheath 12F And the back side outer sheet 12B may be used. Specifically, various nonwoven fabrics such as spun bond nonwoven fabric, melt blown nonwoven fabric, point bond nonwoven fabric, air through nonwoven fabric, air point nonwoven fabric, spun lace nonwoven fabric and SMS nonwoven fabric made of PP, PP / PE and PP / And a deodorant or the like added thereto may be used.

A high body pressure is applied to the high sheer outer sheet 12M when seated. Therefore, a material having a high rubbing fastness (non-fluffy) property is preferable.

The high-sheer exterior sheet 12M may be printed or colored to be a sheet having design elements. In the case of using in combination with the above-mentioned design sheet, it is preferable that the respective designs are arranged so as not to overlap each other.

It is preferable that the stretchable nonwoven fabric is used as the high sheath outer sheet 12M to stretch in the lengthwise direction of the inner body 200 and adhere to the inner sheath 200 because the fitability of the stretchable portion is improved.

The rigidity of both side portions of the inner body 200 is improved if the high sheer outer sheet 12M is moved from the side in the width direction to the side of the body and adhered and fixed to the outer surface of the barrier sheet 62 with a hot- In such a configuration, it is preferable to use a sheet having a high strength (degree of filtration) for the high-sheer external sheet 12M. Concretely, a sheet having a stiffness measured by the Clark method (JIS L1096 C method) is 100 mm or more, preferably 150 mm or more, in the MD direction and the CD direction of the sheet may be used.

In the illustrated example, the high-sheer external sheet 12M is provided between the internal body 200 and the back and the back-side external sheets 12F, 12B in a portion where the back side and the back side outer sheets 12F, 12B overlap with the inner side body 200. [ 12B, but it is also possible to adhere to the outside of the back side and back side external sheeting 12F, 12B. The high sheer outer sheet 12M is adhered to the inner and outer surfaces of the back side and back side of the inner body 200 and the outer side sheets 12F and 12B of the inner body 200 with a hot melt adhesive or the like.

&Lt; Second embodiment >

11 to 13 show a pants-type disposable diaper according to a second embodiment. In the first embodiment, the waist-surrounding upper end portion U1 of the waist-surrounding intermediate portion U2 and the back side outer sheet 12B of the back side outer sheet 12F is formed of a single sheet of air- The elastic stretchable member 19 described above is formed in the waist-surrounding intermediate portion U2 of the back side outer sheet 12F in the second embodiment, while the elastic member and the adhesive for securing it are not provided, Described elastic stretchable member 15 is also formed in the waist-surrounding upper end portion U1 of the back side outer sheet 12B.

As described above, in the rear outer sheet 12F, the waist-surrounding intermediate portion U2 is composed of a plurality of layers and the elastic stretchable member 19 and the portion having the adhesive, and the waist-surrounding upper end U1 is the elastic stretchable member 19. [ And the waist-surrounding intermediate portion U2 is a portion which does not have the elastic stretchable member 15 and the adhesive, and the waist-surrounding upper end portion U1 is a portion that does not have the adhesive, Layered portion 23 of the back side external sheet 12F in a product state in which the back side external sheet 12F and the back side external sheet 12B are overlapped with each other, The thin layer portions 23 are shifted in the vertical direction so that the thin layer portions of the back side outer sheet 12B and the back side outer sheet 12B do not overlap each other and in the same vertical direction range as the thin layer portion 23 of the back side external sheet 12F, The sheet of the sheet 12B The elastic stretchability of the trunk circumference is secured by the elastic stretchable member 15 and the elastic stretchable member 19 of the back side external sheet 12F provided within the range in the same vertical direction range as the thin layer portion 23 of the back side external sheet 12B The elasticity of the waistline can be secured. Therefore, the flexibility and air permeability are further improved, the pit fit around the waist is not lowered well, and the waist circumference is not loosened well.

<Third Embodiment>

As shown in Figs. 14 and 15 (B), instead of constituting the entire outer sheets 12F and 12B in a two-layer structure by folding back one sheet of air-permeable material 12 on both the waist side and the high- , One sheet of air-permeable material 12 forming the outermost surface is folded back at the waist end edge to form a necessary portion such as the waist side end W of each of the outer sheets 12F and 12B Like air permeable material 12X is joined to the inner surface side of the sheet-like breathable material 12 forming the outermost surface so that the outer periphery of each of the outer sheets 12F and 12B It is also proposed to construct a necessary part such as the lower end U3 by a two-layer structure. In this case, the end edges of the sheet-like breathable materials 12 and 12X are exposed at the outer edge of the outer sheets 12F and 12B, but are not exposed to other portions. In other words, the end edge of the sheet-like breathable material of each outer sheet is not exposed at the waist side edge, where deterioration of the skin is particularly likely to occur.

The air permeable material of a separate member is joined to the inner surface side of the sheet-like breathable material 12 forming the outermost surface so that the waist side end W of each of the outer sheets 12F and 12B Like air-permeable material 12 forming the outermost surface is folded back at the side edge of the outer side of the outer sheets 12F and 12B and the lower end U3 of the waist of each of the outer sheets 12F and 12B ) Can be formed in a two-layer structure. Further, sheet-like breathable materials of separate members are bonded to the inner surface side of the sheet-like breathable material 12 forming the outermost surface and the waist side end portions W of the outer sheets 12F and 12B And the waist-surrounding lower end U3 may be formed in a two-layer structure.

&Lt; Fourth embodiment >

Instead of fixing the front end portion 201 and the rear end portion 202 of the inner body 200 between the waist side folded portion 21 and the outer surface side material as in the first embodiment, Slits 27 and 27 along the width direction are formed at the widthwise center of each of the outer sheets 12F and 12B and the front end 201 of the inner body 200 And is passed through the slit 27 of the rear outer sheet 12F to be fixed to the outer surface of the rear outer sheet 12F with a hot melt adhesive or the like and the rear end 202 of the inner body 200 is passed through the back side outer sheet 12B And then fixed to the outer surface of the back side outer sheet 12B with a hot melt adhesive or the like. In this case, since the end edges of the built-in body constituting material exposed to the front edge and the rear edge of the inner body 200 are located on the outer surfaces of the outer sheets 12F and 12B, It is possible to prevent the touch panel 200 from being peeled off or deterioration of the touch due to the front and rear ends of the inner body 200. Although the illustrated example is a modification of the first embodiment, it can be applied to the second and third embodiments. Especially, as in the third embodiment, when it is difficult to sandwich between the sheet-like breathable materials 12 of the outer sheets 12F, 12B Lt; / RTI &gt;

<Fifth Embodiment>

Instead of fixing the front end portion 201 and the rear end portion 202 of the inner body 200 between the waist side folded portion 21 and the outer surface side material as in the first embodiment, The front end portion 201 and the rear end portion 202 of the inner body 200 are placed on the innermost face of the back side outer sheet 12F and the innermost face of the back side outer sheet 12B, The front cover 201 is integrally joined over the portion from the front end 201 of the inner body 200 to the front and the innermost portions of the rear outer sheet 12F located on both sides in the width direction, And the inner peripheral surface of the back side portion 202 of the inner body 200 and the innermost side portion of the outer side sheet 12B located on both sides of the rear side and widthwise sides of the inner side body portion 12B, It is also proposed to bond the rear cover sheet 26 with a hot melt adhesive or the like. In this case, the end edge of the inner body constituting material exposed to the front edge and the rear edge of the inner body 200 can be pressed against the outer sheets 12F and 12B while covering the front edge and the rear cover sheet It is possible to prevent the inner skin 200 from being peeled off from the outer sheets 12F and 12B or to prevent the touch from being deteriorated by the front and rear ends of the inner skin 200. [ As can be seen from the drawing, the fifth embodiment is suitable particularly when the inner body 200 is difficult to sandwich between the sheet-like breathable materials 12 of the outer sheets 12F and 12B as in the third embodiment. However, The present invention is also applicable to the first and second embodiments.

<Sixth embodiment>

A sixth aspect relates to an improvement of the inner body (200). The longitudinal lengths of the liquid impervious sheet 11 and the front sheet 58 are shorter than those of the first to fifth embodiments and the front and rear ends of the inner body 200 201, and 202 have no liquid-impermeable sheet 11 and a pleated sheet 58, respectively. The liquid impermeable sheet 11 and the forefoot sheet 58 are longer than the absorbent body 56 in the anteroposterior direction and extend to the front and back of the absorbent body 56. [ The intermediate sheet 40 is not present at the front and rear ends 201 and 202 of the inner body 200 as in the first to fifth embodiments. On the other hand, the topsheet 30 and the high-sheath outer sheet 12M extend to the front and rear ends 201 and 202 of the inner body 200, and the topsheet 30 and the high- Are bonded to the front and rear ends (201, 202) of the body (200) across the entire width direction by an adhesive (31) such as a hot melt adhesive. As can be seen from this structure, it is preferable that the high-sheave outer sheet 12M is disposed over the entire length of the inner body 200, and the front and rear ends 201, 202 of the inner body 200 are It is preferable that the nonwoven fabric is composed of only nonwoven fabric. The term &quot; front and rear ends of the inner body &quot; as used herein refers to a portion including at least a portion of the fixing portion with respect to the outer sheets 12F and 12B. For example, the front and rear edges of the inner body 200, It can be a part of about 5 ~ 15 mm each.

In the thus configured disposable diaper, the front and rear ends 201 and 202 (particularly, the end edges thereof) of the inner body 200 are thin and smooth and excellent in air permeability. The front and rear ends 201 and 202 of the inner body 200 can be covered with the waist side folding portion 21 or inserted into the outside of the outer sheets 12F and 12B to pass therethrough, (25, 26), it is possible to further improve the feeling of fit, and it is possible to suppress the deterioration of the wearing feeling even if it is exposed to the inner side without covering. Since the front and rear end portions 201 and 202 of the inner body 200 are thin and flexible, when the entire inner body 200 is exposed to the inner surfaces of the outer sheets 12F and 12B, Even if the end portions are spaced apart from the outer sheets 12F and 12B, there is no incongruity to the wearer. The fixing portions of the inner sheet 200 and the outer sheets 12F and 12B of the inner sheet 200 are extended to the end edges of the front and rear ends 201 and 202 of the inner sheet 200 It is easy to manufacture. At this time, the edges of the front and rear ends 201, 202 of the inner body 200 on the side opposite to the outer sheets 12F, 12B on the side of the crotch part are located at the front and rear ends of the liquid-impervious sheet 11 It is preferable to locate the front and rear end edges of the inner body 200 rather than the edge, because only the thin and soft portions are spaced apart from each other. On the other hand, if the liquid impermeable sheet (particularly the film material) 11 and the foreposite (particularly the paper material) 58 are present on the front and rear ends 201 and 202 of the inner body 200, (The case where the absorber 56 is present at the front and rear ends 201, 202 of the inner body 200 is also the same). As can be seen from this, when the nonwoven fabric is used as the backsheet 58, the backsheet 58 may be extended to the front and rear ends 201, 202 of the inner body 200. [ In this case, the decrease in air permeability is small, and the front and rear ends of the inner body 200 are also not easily hardened.

On the other hand, out of the elongated elastic stretchable members 63 attached to the barrier cuff 60, the elongated elastic stretchable member 63 located most outward in the width direction has a fixed length (elongated elastic stretchable member 63 (Corresponding to the entire length of the member 63 in the longitudinal direction) of the absorbent body 56 is preferably longer than the longitudinal length of the absorbent body 56. The front and rear ends 201 and 202 ) To the spacing portions with respect to the outer sheets 12F, 12B. With such a structure, when the entire inner body 200 is positioned (particularly exposed) on the inner surface side of the outer sheets 12F and 12B, the inner surface of the inner body 200 is rounded and recessed, Boat shape) so that the fit performance is improved. However, if the elongated elastic stretchable member 63 located at the outermost position in the width direction among the elongate elastic stretchable members 63 is excessively strong, the inner body 200 is excessively curved, It is preferable that the elongation percentage at the time of fixation is lower than that of other elongate elastic stretchable members arranged and fixed along the longitudinal direction of the body 200. [ On the other hand, the barrier cuff 60 in the sixth embodiment is not the inner and outer double structures as in the first to fifth embodiments, but only the outer barrier cuff 60 in the first to fifth embodiments Layer structure of the same structure as that of the inner barrier cuffs 61 of the first to fifth embodiments, but may have a single-layer structure of the same structure as that of the inner barrier cuffs 61 of the first to fifth embodiments, or may have a double structure as in the first to fifth embodiments You may. In order to prevent leakage from the side portion of the inner body 200, a waterproof film may be provided in the barrier cuffs 60 and 61. In this case, Can be deployed. Therefore, it is possible to further improve the water resistance of the barrier sheet 62 itself constituting the barrier cuffs 60 and 61, or to improve the water-impermeability of the barrier cuffs 60 and 61 themselves, It is preferable that the sheet 11 extends to both sides of the absorbent element 50 and extends to both sides of the side surface 30 of the absorbent element 50. [

<Seventh Embodiment>

The seventh aspect is a form shown in Figs. 29 to 34, and the parts not shown in these figures are the same as those of the first embodiment, so that they can be understood by referring to the drawings of the first embodiment. In the seventh aspect, the back side outer sheet 12F and the back side outer sheet 12B are formed by folding one sheet-like material 12 to form a two-layer structure and attaching them to each other as shown in Figs. will be. Characteristically, in each of the outer sheets 12F and 12B, the sheet-like material 12 is folded back from the outermost face to the innermost face as a line that connects the waist end edge (the edge of the waist opening WO) The folded portion is formed as a waist side folding portion 21 that covers the entire waist side portion in the vertical direction relative to the innermost face, and the sheet-like material 12 is formed as a wedge- Side folded portion 22 that covers the whole of the portion on the high-order side with respect to the intermediate position in the vertical direction on the innermost face. Side end portion of the waist side folding portion 21 and the waist side end edge of the high-density side folding portion 22 are formed so as to prevent the waist side folding portion 21 and the high- (Matching).

As a result of such a structure, as can be seen from the material lamination structure of the side seal portion 12A shown in Fig. 34B, the sheet-like material at the waist side end portion of the side seal portion 12A The number of sheets of the sheet-like material 12 at the end portion of the gap side and the number of sheets of the sheet-like material 12 at the middle portion between the waist end portion and the gap side end portion are the same 4 It is a chapter. Therefore, it is possible to uniformly bond the whole of the side seal portion 12A with an appropriate bonding strength. On the other hand, in the conventional configuration shown in Fig. 25, the number of stacked sheet-like materials 12 at the waist side end portion is six and the number of stacked sheet-like materials 12 at the high- Uniform deposition is difficult. Since the other configurations are the same as those of the first embodiment, a description thereof will be omitted.

<Eighth embodiment>

The eighth form is a form shown in Fig. 35, which is the same as the second form described above with respect to the seventh form. The portion not shown in Fig. 35 can be understood by referring to the drawings of the second and seventh embodiments.

In the eighth form, as can be seen from the material lamination structure of the side seal portion 12A shown in Fig. 35 (b), the sheet-like air permeable material 12 at the waist side end portion of the side seal portion 12A, Like air-permeable material 12 in the middle portion between the waist side end portion and the high-gap side end portion of the sheet-like air-permeable material 12 (four sheets) And the number of layers is less (two sheets). Therefore, only by forming the side seal evenly in the side seal portion 12A, the bonding strength of the sheet-like breathable material 12 between the waist side end portion and the high-gap side end portion of the side seal portion 12A is made substantially equal It is also easy to make the side seal part 12A strongest among the parts of the side seal part 12A. The waist side end portion and the high-gap side end portion of the side seal portion are a portion to which a particularly strong force is applied during mounting but are the starting and ending points for pulling off and peeling off the middle sealing portion 12A. (Preferably not stronger than the starting point and the end point) is required. Therefore, if it is configured as described above, there is no unintentional peeling off of the side seal portion 12A during mounting and easy peeling off after use do. On the other hand, in the conventional configuration shown in Fig. 25, the number of sheets of the air-permeable sheet 12 at the waist side is six and the number of sheet-like air-permeable materials 12 at the end side is four And it is difficult to obtain the above effect. The other configurations are the same as those of the second and seventh embodiments, and therefore, a description thereof will be omitted.

<Ninth embodiment>

The ninth embodiment is a form shown in Figs. 36 and 37, and is the same as the third embodiment described above with respect to the seventh embodiment. Also, since the contents of the modification are the same as those of the third embodiment described above, the same reference numerals are given to the same parts and the description thereof is omitted.

<Tenth Embodiment>

The tenth form is a form shown in Figs. 38 and 39, and a modification similar to the fourth form described above is applied to the above-described seventh form. Since the modification contents are the same as those of the fourth embodiment described above, the same reference numerals are given to the drawings and the description is omitted. In the ninth embodiment, the sheet-like breathable material 12 of the external sheets 12F and 12B is sandwiched between the sheet-like breathable materials 12, It is suitable for difficult cases.

&Lt; 11th embodiment >

The eleventh embodiment is a form shown in Figs. 42 and 21, which is the same as the above-described seventh embodiment, to which the same modification as the fifth embodiment described above is applied. Since the modification contents are the same as those of the above-described fifth embodiment, the same reference numerals are given to the drawings, and a description thereof will be omitted. On the other hand, the eleventh embodiment is particularly suitable for the case where it is difficult to sandwich the inner body 200 between the sheet-like breathable materials 12 of the outer sheets 12F and 12B as in the ninth embodiment, but also applies to the seventh and eighth embodiments This is possible.

&Lt; 12th embodiment &

The twelfth embodiment is the one shown in Fig. 42, and the seventh to eleventh embodiments described above are modified in the same manner as the sixth embodiment described above. On the other hand, since the modification contents are the same as those of the sixth embodiment described above, the same reference numerals are given to the drawings, and a description thereof will be omitted.

<Other Forms>

Thin layer portions 23 are respectively formed on both outer sheets 12F and 12B in the first to sixth embodiments, but thin layer portions 23 may be formed on only one side (e.g., back side) It is also possible to make a form that does not. In this case, since the side seal portion 12A is pulled toward the back side at least in the middle portion of the side seal portion when the thin layer portion 23 is formed only on the back side, It is preferable that the lower end side of the side seal portion 12A is displaced to the back side during use so that swelling or curling of the buttock cover portion 14C is less likely to occur.

100: waist portion, 11: liquid impervious sheet,
12F: back side outer sheet, 12B: back side outer sheet,
200: interior body, 21: waist side folding portion,
22: folding portion on the side of the harness, 23:
25: front cover sheet, 26: rear cover sheet,
27: slit, 30: top sheet,
40: intermediate sheet, 50: absorbing element,
52: fiber, 54: superabsorbent polymer particle,
56: absorber, 58: poppy sheet,
60: side barrier cuff, 62: barrier sheet,
70: back side elastic sheet.

Claims (10)

A tubular waist portion formed by joining both side portions of the back side outer sheet and both side portions of the back side outer sheet;
And a visceral body formed to extend from a widthwise central portion of the inner surface of the back side outer sheet to a widthwise central portion of the inner side surface of the back side outer sheet,
Wherein the back side outer sheet and the back side outer sheet are not continuous on the side of the back side and are spaced apart from each other. In the pull-on type disposable diaper,
Wherein the back side outer sheet and the back side outer sheet include a waist side end portion, a waist circumference upper end portion, a waist circumference middle portion, and a waist circumference lower end sequentially from above in the same vertical direction range as the side seal portion to be joined,
At least one of the back side outer sheet and the back side outer sheet;
Like waist-side end portion and the waist-surrounding lower end portion are formed by joining sheet-like breathable materials of plural layers, and an elastic stretchable member is sandwiched and fixed between these sheet-like breathable materials in a state elongated along the width direction,
And at least one of the waist-surrounding upper end portion and the waist-surrounding intermediate portion is made of a single-layer sheet-like breathable material, and does not include an elastic stretchable member and an adhesive for fixing the elastic stretchable member.
The method according to claim 1,
The waist side end portion and the waist circumferential lower end portion of the back side outer sheet and the back side outer sheet are formed by joining a plurality of sheets of air permeable material and the elastic stretchable member is stretched between the sheet air permeable materials along the width direction State,
The waist-surrounding middle portion in the waist circumference upper end portion and the back side waist covering portion of the back side facing sheet is made of a single sheet of air-permeable material and is made of an elastic stretchable member and a pants type disposable diaper.
3. The method of claim 2,
The shoulder cover portion includes a widthwise central portion overlapping with the inner body, and a hip cover portion extending to both sides of the inner cover, Including,
Wherein the shoulder extension portion is formed by joining sheet-like breathable materials of plural layers, and at the same time, the elastic stretchable member is held and fixed at least in the buttock cover portion between these sheet-like breathable materials in a state elongated along the width direction,
Wherein a contraction force in the width direction at the lower end portion of the back side outer sheet is greater than a contraction force in the width direction at the lower end portion and the back side extending portion of the back side outer sheet.
The method of claim 3,
Wherein the waist-surrounding intermediate portion of the back side facing sheet and the waist-surrounding upper end portion of the back side facing sheet are formed by joining sheet-like breathable materials of a plurality of layers, and an elastic stretching member is formed between the sheet- Wherein the elastic member is fixedly held in a stretched state along a direction of the elastic member.
The method of claim 3,
Wherein the waist-surrounding intermediate portion of the back side facing sheet and the waist-surrounding upper end portion of the back side facing sheet are made of a single sheet of air-permeable material, and the elastic stretching member and the pants- Disposable diapers.
The method of claim 3,
A pull-on type disposable diaper having a side seal portion inclination angle of 20 degrees or less in a side seal portion inclination test.
3. The method of claim 2,
Wherein a front edge portion and a rear edge portion of the front end portion and the rear end portion of the inner body are configured not to include a sheet material made of a film material or a paper material.
3. The method of claim 2,
Wherein the number of laminated sheet-like materials at the waist side end portion and the number of laminated sheet-like materials at the high-temperature side end portion of the side seal portions, which are both sides of the back side outer sheet and both side portions of the back side outer sheet, And the number of laminated sheet-like materials in the middle portion between the waist side end portion and the high-gap side end portion is equal to or less than the number of laminated sheet-like materials at the waist side end portion and the high-gap side end portion. diaper.
9. The method of claim 8,
Wherein the welding and bonding is performed by ultrasonic welding.
10. The method of claim 9,
Wherein the side seal portion is linearly formed from an upper edge to a lower edge of a portion where both side portions of the back side external sheet and both side portions of the back side external sheet overlap.

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