CN116350431A - Underpants type absorbent article and absorbent article package - Google Patents

Abstract

The invention provides a pants-type absorbent article and an absorbent article package, wherein the pants-type absorbent article is not easy to feel uncomfortable to a wearer and has good appearance. The underpants type absorbent article (1) comprises: an absorptive body (10); and a composite sheet (20) having a skin side sheet and a non-skin side sheet and constituting at least a part of a pair of leg opening edges, wherein the pants-type absorbent article has a composite sheet joining portion (60) joining the skin side sheet and the non-skin side sheet, and an outer sheet (30) laminated on the non-skin side surface of the non-skin side sheet, the outer sheet having: a sheet joining part (31) which joins the non-skin side sheet; and a sheet non-joined portion (32) which is not joined to the non-skin-side sheet, wherein in the composite sheet, in the extended state, the minimum value of the distance (L32) between the sheet non-joined portion in the up-down direction is larger than the minimum value of the distance (g 60) between the leg opening edge (1 be) and the composite sheet joined portion.

Description

Underpants-type absorbent article and absorbent article package

technical field

The present invention relates to a pant-type absorbent article and an absorbent article package.

Background technique

Conventionally, in the underpants type (shorts type) absorbent article having an absorbent main body and a waist member, there is known a method of improving functional absorption during use by providing a sheet member on the surface (non-skin side) of the waist member. sex items. For example, Patent Document 1 discloses the following technology: by providing a belt-shaped member on the surface (non-skin side) of the waist area of a panty-type disposable diaper, the fit at the waist can be improved, and the skin after use can be improved. The diaper is fastened in a rolled state so that the parts soiled by excrement are not exposed.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2000-102560

Contents of the invention

The problem to be solved by the invention

In recent years, users have increasingly demanded the design of absorbent articles. In order to make the underwear-type absorbent article have a good appearance like underwear, a sheet member as in Patent Document 1 is provided, and a part of the sheet member is formed. Attention has been drawn to a technique in which no adhesive is provided on the dry edge and the pleats formed by the dry edge look like frills. In this case, if some side portions are small, it is difficult to obtain an appearance like a hem. Therefore, it is preferable to form a three-dimensional elegant hem by making the dry side portion larger. On the other hand, in materials such as nonwoven fabric constituting an absorbent article, if some side parts are too large, the dry side parts may roll up and rub against the wearer's skin, causing discomfort to the wearer. In particular, the leg openings of the underpants-type absorbent article are likely to rub against the wearer's legs during walking or the like, thereby easily causing discomfort to the wearer.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an absorbent article that does not easily cause discomfort to the wearer and has a good appearance.

solutions to problems

The main technical solution for achieving the above objects is a pant-type absorbent article having vertical, lateral, and front-rear directions intersecting each other, and having: an absorbent main body having a liquid-absorbent absorbent core; and A composite sheet having a skin side panel and a non-skin side panel, and constituting at least a part of a waist opening edge and at least a part of a pair of leg opening edges, is characterized in that the underwear-type absorbent article has the skin side sheet and the composite sheet joining portion of the non-skin side sheet, the composite sheet has an outer sheet laminated on the non-skin side sheet of the non-skin side sheet, and the outer sheet has: a sheet joining portion, which is connected to the non-skin side sheet The non-skin side sheet is joined; and the sheet non-joint portion is adjacent to the sheet joint portion in the vertical direction, has a predetermined width in the left-right direction, and is not connected to the non-skin side sheet. Joining, in the stretched state, in the composite sheet, the minimum value of the distance between the non-joint portion of the sheet in the vertical direction is greater than the distance between the opening edge of the leg circumference and the joint portion of the composite sheet The minimum value of the distance is large.

Other characteristics of the present invention will be clarified by the description in this specification and the accompanying drawings.

The effect of the invention

According to the present invention, it is possible to provide an absorbent article which hardly causes discomfort to a wearer and has a good appearance.

Description of drawings

Fig. 1 is a schematic perspective view of a sanitary napkin 1 according to the first embodiment.

Fig. 2 is a plan view of the sanitary napkin 1 in an unfolded and extended state.

FIG. 3 is a schematic cross-sectional view of A-A in FIG. 2 .

FIG. 4 is a plan view of the absorbent main body 10 .

FIG. 5 is a schematic cross-sectional view of the absorbent main body 10 .

FIG. 6 is an enlarged view showing the area X in FIG. 2 , and is a view explaining the dry edge formed at the leg opening edge 1be.

Fig. 7 is a diagram illustrating the state of the dry edge of the leg opening edge 1be when the sanitary napkin 1 is worn.

FIG. 8 is an enlarged view showing the region Y in FIG. 2 , and is a view illustrating dry edges formed at the boundary between the skin side sheet 22 and the non-skin side sheet 21 in the front waistline portion 20f.

FIG. 9 is a diagram illustrating a joining portion between the absorbent main body 10 and the composite sheet 20 .

Fig. 10 is a schematic cross-sectional view showing the structure of the panty-shaped sanitary napkin 1 cut in the vicinity of the center in the left-right direction.

FIG. 11 is a schematic cross-sectional view showing a first modification of the sanitary napkin 1 .

FIG. 12 is a schematic cross-sectional view showing a second modified example of the sanitary napkin 1 .

13A to 13D are diagrams illustrating a folding method for packaging the sanitary napkin 1 .

14A to 14C are diagrams illustrating a method of wrapping the sanitary napkin 1 in a folded state.

Fig. 15 is a plan view of the sanitary napkin 2 in an unfolded and extended state.

Fig. 16 is a schematic cross-sectional view of the sanitary napkin 2 in an unfolded and extended state.

Explanation of reference signs

1. Sanitary napkin (first embodiment: underpants type sanitary napkin, underpants type absorbent article); 2. Sanitary napkin (second embodiment: underpants type sanitary napkin, underpants type absorbent article); 1a, waist opening; 1b , leg circumference opening; 1be, opening edge (leg circumference opening edge); 10, absorbent main body; 11, absorbent core; 11ef, upper end (front side); 12, top sheet; 13, second sheet; 14, bottom sheet 15, side panel; 15t, end; 17, high-density portion; 20, composite sheet (waist body member); 20f, front side waist portion; 20ef, upper end (front side); 20b, rear side waist portion; 20eb, Upper end (rear side); 20cf, middle position; 20we, side junction; 21, non-skin side piece; 22, skin side piece (stretchable piece); 23, skin side piece (stretchable piece); 25, waist upper end Elastic member (first elastic member); 26. Waist elastic member (composite sheet junction); 27. Skin side panel; 28. Skin side panel; 30. Outer side panel (front folded part); 31. Sheet junction 32. Sheet non-joint portion; 33. Temporarily fixed joint portion; 34. Sheet member; 35. Elastic member (second elastic member); 40. Rear side folded portion; 41. Rear side sheet joint portion; 42 . Rear sheet non-joint portion; 50. Absorbent elastic member; 51. Central absorbent elastic member; 52. Both side absorbent elastic members; 60. Welded portion (joint portion of composite sheet); 71. End portion Joint part; 80, main body joint part; 110, packing material; 111, first packing material joint part; 112, second packing material joint part; Boundary); g20we, seam length (both sides of side seam); g15t, seam length (side panel ends); g80, seam length (both sides of body seam); GER, waist elastic area; CL, central location.

Detailed ways

From the description of this specification and the drawings, at least the following matters are clarified.

A pant-type absorbent article having vertical, lateral, and front-to-back directions intersecting each other, and having: an absorbent main body having a liquid-absorbent absorbent core; and a composite sheet having a skin side sheet and a non- The skin side panel constitutes at least a part of the opening edge of the waist and at least a part of the opening edge of the pair of legs, and it is characterized in that the underwear-type absorbent article has a joint for joining the skin side panel and the non-skin side panel. A composite sheet joining portion, the composite sheet having an outer sheet laminated on the non-skin side sheet of the non-skin side sheet, the outer sheet having: a sheet joining portion joined to the non-skin side sheet; and a sheet The non-joint part, which is adjacent to the sheet joint part in the up-down direction, has a predetermined width in the left-right direction, and is not joined to the non-skin side panel, is stretched in the stretched state. In the above composite sheet, the minimum value of the distance in the vertical direction of the non-joint portion of the sheet is greater than the minimum value of the distance between the leg opening edge and the joint portion of the composite sheet.

According to such an underpants-type absorbent article, compared with the opposite case (the dry edge in the vertical direction of the non-joint portion of the sheet is smaller than the dry edge formed at the edge of the leg opening), the edge formed at the edge of the leg opening The dry edge is relatively small, so that the dry edge can be suppressed from being rolled up and rubbed against the wearer's skin (legs) during walking, and the wearer can hardly feel uncomfortable. In addition, since the dry edge formed on the outer sheet is relatively large, it is easy to form a large hem, so that a pull-on absorbent article having a good appearance can be realized.

In this underpants-type absorbent article, it is preferable that, in the composite sheet in an extended state, the minimum value of the distance of the non-joint portion of the sheet in the vertical direction is greater than the distance between the leg opening edge and the The maximum value of the distance between the joint portions of the composite sheet is large.

According to such an underpants-type absorbent article, even when the distance between the leg opening edge and the joint portion of the composite sheet is not constant and the dry edge length of the leg opening edge is the maximum, the dry edge (pleat) formed on the outer sheet sides) are also formed larger. Therefore, a pants-type absorbent article having a better appearance can be realized.

In this underpants-type absorbent article, it is preferable that the composite sheet has: a lamination portion in which the skin side sheet and the non-skin side sheet are laminated; and a non-lamination portion in which the non-lamination portion The skin side sheet and the non-skin side sheet are not laminated, and in the composite sheet in an elongated state, the minimum value of the distance between the non-joint portion of the sheet in the vertical direction is greater than that of the laminated portion and the non-skin side sheet. The minimum value of the distance between the boundary of the non-laminated portion and the junction portion of the composite sheet is large.

According to such an underpants-type absorbent article, the dry edge formed at the boundary between the laminated portion and the non-laminated portion of the composite sheet is relatively small, so that the dry edge can be suppressed from rubbing against the wearer's skin during wearing, and the The wearer experiences discomfort. In addition, since the dry edge formed on the outer sheet is relatively large, it is easy to form a large hem, so that a pull-on absorbent article having a good appearance can be realized.

In this underpants-type absorbent article, it is preferable that the absorbent main body has a side sheet whose both sides in the left-right direction are bent from the outer side to the inner side, and that the absorbent main body has end parts. The end joint portion joins the inner end portion in the left-right direction of the folded side panel and the sheet member opposite to the inner end portion on the non-skin side in the thickness direction, and is stretched. In the absorbent main body in the state, the minimum value of the distance between the sheet non-joint portion in the vertical direction is greater than the distance between the inner side end in the left-right direction of the end joint portion and the inner side end portion. The minimum value of the distance between the inner side ends in the left-right direction is large.

According to such an underpants-type absorbent article, the dry edge formed at the inner end of the side sheet of the absorbent main body is relatively small, so that the dry edge can be suppressed from rubbing against the skin of the wearer's crotch, groin, etc. It can hardly cause discomfort to the wearer. In addition, since the dry edge formed in the sheet non-joint portion of the outer sheet is relatively large, it is easy to form a large hem, and the appearance of the underwear-type absorbent article can be improved.

In this underpants-type absorbent article, it is preferable that the underpants-type absorbent article has a main body joining portion that joins the absorbent main body and the composite sheet, and the non-joining portion of the sheet is in an extended state. The minimum value of the distance in the up-down direction is larger than the minimum value of the distance between the outer end in the left-right direction of the main body joint portion and the outer end in the left-right direction of the absorbent main body.

According to such an underpants-type absorbent article, the dry edges formed on both sides in the left-right direction of the absorbent main body are relatively small, so that the dry edges can be suppressed from rubbing against the skin of the wearer's buttocks, thighs, and the like. The situation can hardly make the wearer feel uncomfortable. In addition, since the dry edge formed in the sheet non-joint portion of the outer sheet is relatively large, it is easy to form a large hem, and the appearance of the underwear-type absorbent article can be improved.

In this underpants-type absorbent article, it is preferable that the minimum value of the distance in the vertical direction of the non-joint portion of the sheet is greater than that of the folds formed on the non-skin side of the composite sheet in the natural state in the thickness direction. The maximum value of the height is large.

According to such an underpants-type absorbent article, the height of the creases formed on the non-skin side of the composite sheet is relatively low, so that it is possible to prevent the creases from becoming more noticeable than the frills or to be placed between the creases and the wearer's clothes due to the influence of the creases. A situation that creates friction. In addition, since the dry edge formed in the sheet non-joint portion of the outer sheet is relatively large, it is easy to form a large hem, and the appearance of the underwear-type absorbent article can be improved.

In this underpants-type absorbent article, it is preferable that the composite sheet has a front waist portion and a rear waist portion, and that the composite sheet has a pair of side joints located between the left and right sides. Both ends in the direction join the front waist portion and the rear waist portion to each other, and in the composite sheet in the stretched state, the distance between the sheet non-joint portion in the vertical direction is The minimum value is larger than the minimum value of the distance between the outer end in the said left-right direction of the said composite sheet, and the outer end of the said side joint part.

According to such a pants-type absorbent article, it can be suppressed that the dry hem formed at the side joint portion is larger than the hem, making the hem less noticeable. Thereby, a user can visually recognize a frill easily, and can improve the external appearance of a pants-type absorbent article.

In this underpants-type absorbent article, it is preferable that the distance in the vertical direction of the sheet non-joint portion in the stretched state is 5 mm or more and 25 mm or less.

According to such an underpants-type absorbent article, by making the distance (length) of the non-joining portion of the sheet 5 mm or more, it is possible to suppress the fact that the creases (ruffles) formed in the non-joining portion of the sheet are hardly noticeable, Therefore, it is difficult to distinguish it from other wrinkles formed on the surface of the waist member. In addition, by setting the distance (length) of the sheet non-joint portion to 25 mm or less, it is possible to prevent the sheet non-joint portion from sagging downward due to its own weight, making it difficult to form hems three-dimensionally.

In this underwear-type absorbent article, it is preferable that at least one of the skin side sheet and the non-skin side sheet is folded back from the skin side to the non-skin side at the upper end of one side of the composite sheet, Thus forming the outer sheet.

According to such a pants-type absorbent article, it is possible to reduce the work of preparing an additional material for forming the outer sheet and joining it to the composite sheet. In addition, it is possible to form the sheet joining portion and the like while arranging the elastic member in the folded-back portion, thereby improving the efficiency of the manufacturing process of the underpants-type absorbent article. Therefore, the manufacturing cost and man-hours of the underpants-type absorbent article can be reduced.

In the underpants-type absorbent article, it is preferable that the one side is the front side in the front-rear direction.

According to such an underpants-type absorbent article, frills are formed on the abdomen side of the wearer, and the user (wearer) can easily visually recognize the frills. In addition, when the underpants-type absorbent article is taken out of the package, frills are arranged on the front side of the underpants-type absorbent article, so that the existence of the frills can be easily recognized at a glance, and the user can be provided with underwear with high design quality. Such a good impression.

In this underpants-type absorbent article, it is preferable that the underpants-type absorbent article has a rear side folded portion passing through the upper end of the rear side of the composite sheet in the front-rear direction. At least one of the skin side panel and the non-skin side panel is folded back from the non-skin side to the skin side, and at least a part of the rear folded portion overlaps the absorbent main body in the vertical direction. .

According to such an underpants-type absorbent article, it is possible to suppress the upper edge of the rear side of the absorbent main body from being directly pressed against the wearer's skin, so that the wearer is less likely to feel uncomfortable or uncomfortable. In addition, by covering the rear upper end of the absorbent main body with the rear folded portion, leakage of excrement such as menstrual blood from the rear of the absorbent main body (back leakage) can be suppressed.

In this underpants-type absorbent article, it is preferable that the rear folded portion has a rear sheet non-joint portion that is not connected to the composite sheet at the rear side in the front-rear direction. Joined with at least one of the absorbent main bodies, in an extended state, the length of the non-joint portion of the sheet in the vertical direction is longer than that of the non-joint portion of the rear side sheet in the vertical direction. The upper length is long.

According to such an underpants-type absorbent article, the front side of the underpants-type absorbent article is formed with relatively large frills at the sheet non-joint portion, thereby improving the design of the appearance. In addition, since the non-joint portion of the rear sheet is relatively small on the rear side, it is less likely to rub against the wearer's skin, so that discomfort to the wearer can be suppressed.

In this underpants-type absorbent article, preferably, the outer sheet is provided with a plurality of compressed portions scattered at a predetermined pitch, and the plurality of compressed portions are formed by compressing the outer sheet in the thickness direction. In the stretched state, the length of the sheet non-joint portion in the up-down direction is longer than the pitch of the compressed portion.

According to such an underpants-type absorbent article, since a plurality of fine compressed portions (embossing) are arranged on the surface of the outer sheet (sheet non-joined portion), it is easy to use the compressed portion to form a bending starting point, so that the sheets are not joined. The part can be deformed easily and freely. Therefore, more natural and soft hems can be easily formed.

In this underpants-type absorbent article, it is preferable that the composite sheet has a front waist portion and a rear waist portion, and that the composite sheet has a pair of side joints located between the left and right sides. Both ends in the direction join the front waist part and the rear waist part, and the sheet non-joining part is continuous between the pair of side joining parts in the left-right direction.

According to such an underpants-type absorbent article, the non-joining portion of the sheet can be freely deformed in a wide range from one end side to the other end side in the left-right direction, so the non-joining portion formed when the non-joining portion shrinks The pleats tend to become a more natural shape, allowing for a soft-textured ruffle.

In this underpants-type absorbent article, it is preferable that the composite sheet has a front waist portion and a rear waist portion, and that the composite sheet has a pair of side joints located between the left and right sides. Both ends in the direction join the front waist part and the rear waist part, and in the left-right direction, a plurality of temporary fixing parts are provided at predetermined intervals between the pair of side joining parts. A joint portion that joins the composite sheet and the non-joint portion of the sheet is a temporarily fixed joint portion.

According to such a pant-type absorbent article, when the sheet non-joint portion shrinks to form folded folds (ruffles), the outer sheet is temporarily fixed at equal intervals, thereby making it easier to shrink the width of the sheet non-joint portion. become even. Thereby, it is possible to easily form a hem having a uniform and elegant shape.

An absorbent article package obtained by wrapping the underpants-type absorbent article in a folded state with a packaging material, wherein preferably, at least Packaging is carried out in a state where the part is in contact with the packaging material.

According to such an absorbent article package, by packaging with at least a part of the non-skin side surface of the non-joining portion of the sheet in contact with the packaging material, it is possible to prevent the hem from being set in a rolled-up state as a whole. Therefore, when the user unseals the absorbent article package, it is easy to form uniform and elegant hems.

In this absorbent article package, it is preferable to package in a state where at least a part of the skin-side surface of the non-joining portion of the sheet is in contact with the packaging material.

According to such an absorbent article package, by packaging in a state where the skin-side surface of the non-joining portion of the sheet is partially in contact with the packaging material, it is possible to suppress the entire hem from being crushed in the thickness direction. Therefore, when the user unseals the absorbent article package, it is easy to form uniform and elegant hems.

===Implementation mode===

As an example of the underpants type (underpants type) absorbent article according to the embodiment of the present invention, an underpants type sanitary napkin 1 (hereinafter also simply referred to as "the sanitary napkin 1") will be described.

<Basic structure of sanitary napkin 1>

Fig. 1 is a schematic perspective view of a sanitary napkin 1 according to the first embodiment. Fig. 2 is a plan view of the sanitary napkin 1 in an unfolded and extended state. FIG. 3 is a schematic cross-sectional view of A-A in FIG. 2 .

In addition, the "extended state" of the sanitary napkin 1 means that the sanitary napkin is stretched by extending each elastic member (for example, the skin side sheets 22, 23 described later, the absorbent elastic member 50, etc.) 1 The whole (the whole product) is stretched to a state without wrinkles, specifically, the sanitary napkin 1 is stretched until the size of each member constituting the sanitary napkin 1 becomes the same as or close to the size of the single member state.

As shown in FIG. 1 , the sanitary napkin 1 has "upper and lower directions", "left and right directions", and "front and rear directions" that are orthogonal to each other. Moreover, as shown in FIG. 3, the sanitary napkin 1 has a "thickness direction" which is the direction in which each member is laminated|stacked. Let the side which becomes the waist side of the wearer in the state which the wearer wears the sanitary napkin 1 among the up-down directions be "upper side", and let the side which becomes the crotch side of the wearer be "lower side". In addition, in the front-rear direction, the side that becomes the abdomen side of the wearer at the time of wearing is referred to as the "front side", and the side that becomes the back side of the wearer is referred to as the "rear side". Moreover, let the side which contacts the wearer's skin in the state of the wearer wear the sanitary napkin 1 in the thickness direction be "skin side", and let the opposite side be "non-skin side".

In addition, in the unfolded state shown in FIG. 2, the sanitary napkin 1 has a "longitudinal direction" and a "transverse direction" which are orthogonal to each other. The "longitudinal direction" is the direction along the up-down direction in the underpants-type sanitary napkin, and the "horizontal direction" is the direction along the left-right direction in the underpants-type sanitary napkin.

The sanitary napkin 1 of the present embodiment includes: a liquid-absorbent absorbent main body 10 that absorbs liquids such as menstrual blood; The towel 1 is arranged around the waist of the wearer.

(absorbent main body 10)

FIG. 4 is a plan view of the absorbent main body 10 . FIG. 5 is a schematic cross-sectional view of the absorbent main body 10 . As shown in FIG. 2 , the absorbent main body 10 of this embodiment has a substantially rectangular shape in plan view along the vertical direction of the sanitary napkin 1 in the longitudinal direction (corresponding to the longitudinal direction of the absorbent main body 10 ). In addition, as shown in FIG. 4 and FIG. 5 , the absorptive main body 10 has an absorptive core 11 along the longitudinal direction (vertical direction), a top sheet 12 arranged on the skin side of the absorptive core 11, and an absorptive core 12 arranged on the top. The second sheet 13 between the sheet 12 and the absorptive core 11 , the backsheet 14 arranged on the non-skin side of the absorptive core 11 , and the side sheet 15 arranged on the non-skin side of the backsheet 14 .

The absorbent core 11 is a member for absorbing and retaining liquids such as menstrual blood, and is formed of liquid absorbent fibers such as pulp fibers mixed with superabsorbent polymer (SAP), for example. In addition, the absorptive core 11 may be covered with a liquid-permeable sheet member (core wrap sheet) such as tissue paper and nonwoven fabric.

The top sheet 12 is a liquid-permeable sheet member that can come into contact with the wearer's skin when worn, and is formed of, for example, a hydrophilic air-through nonwoven fabric, a spunbonded nonwoven fabric, or the like. The top sheet 12 allows the excreted menstrual blood and the like to penetrate from the skin side to the non-skin side in the thickness direction and be absorbed by the absorbent core 11, and also suppresses the menstrual blood and the like from returning to the skin side from the absorbent core 11 (so-called return). wet).

The second sheet 13 is a sheet member having substantially the same function and structure as the top sheet 12 , and is laminated on the non-skin side of the top sheet 12 . In the sanitary napkin 1, the width of the second sheet 13 in the left-right direction is longer than the width of the top sheet 12 in the left-right direction.

The backsheet 14 is an air-permeable and liquid-impermeable sheet member for preventing liquid such as menstrual blood absorbed by the absorptive core 11 from leaking to the outside, and is formed of, for example, a resin film or the like.

The side sheet 15 is a sheet member laminated on the non-skin side of the back sheet 14, and uses, for example, a hydrophobic nonwoven fabric such as an air-through nonwoven fabric. In this embodiment, as shown in FIG. 5 , the side sheets 15 protrude to both outer sides in the left-right direction (horizontal direction) of the absorbent core 11 , and extend from the thickness at both sides in the left-right direction of the absorbent main body 10 . The non-skin side in the direction is bent toward the skin side from the outer side in the left-right direction, and the bent end 15 t is arranged on the skin side than the absorptive core 11 and the top sheet 12 . By disposing the end portions 15t, 15t of the side panels 15 on both sides in the left-right direction of the skin side of the absorbent core 11 (top sheet 12), menstrual blood etc. move in the left-right direction along the surface of the top sheet 12. In a case where the menstrual blood or the like can be blocked by the ends 15t and 15t. That is, when the sanitary napkin 1 is worn, the end portions 15t, 15t of the side sheet 15 function as leak-proof walls, thereby suppressing side leakage of menstrual blood or the like. Moreover, you may bend a part of the backsheet 14 toward the skin side of the absorptive core 11 (top sheet 12) together with the side sheet 15.

Moreover, the absorptive main body 10 is provided with the high density part 17 in which the density of the absorptive core 11 is higher than surrounding parts. The high density part 17 is formed by compressing each member which comprises the absorptive main body 10 in the thickness direction. As shown in FIG. 4 , the high-density portion 17 of the present embodiment is formed in a curved shape by arranging a plurality of dot-shaped compressed portions. By providing such a high-density part 17, it can suppress that the liquid-absorbent fiber of the absorptive core 11 becomes scattered and loses shape. In addition, when the sanitary napkin 1 is worn, the high-density portion 17 serves as a bending starting point, whereby the absorptive core 11 is easily three-dimensionally deformed according to the shape of the wearer's body, thereby easily fitting the wearer's body.

In addition, the absorbent main body 10 is provided with a plurality of absorber elastic members 50 that expand and contract in the longitudinal direction (vertical direction). The absorbent elastic member 50 is formed of, for example, an elastic thread, and is disposed on the non-skin side of the absorbent core 11 in a state stretched in the longitudinal direction (vertical direction) (in FIG. between). In this embodiment, as shown in FIGS. 4 and 5 , a pair of central absorbent body elastic members 51 arranged at the center in the left-right direction and two pairs of both sides arranged at both ends in the left-right direction are provided. The part absorbent body elastic members 52 are six absorbent body elastic members 50 in total. Preferably, the elongation ratios of the absorber elastic members 50 ( 51 , 52 ) are set to about 2.7 times to 3.2 times, respectively. In addition, the "elongation ratio" of the elastic member means that after measuring a certain length of the elastic member in the stretched state, the measured certain length is cut out, and the state of only the elastic member is formed using an organic solvent, etc., and the organic solvent is air-dried. After 24 hours, measure the length of the elastic member in the natural state and perform division calculation. When wearing the sanitary napkin 1, the absorbent core 11 can be easily pushed up from the non-skin side to the skin side in the thickness direction by the stretchability exhibited by the absorbent elastic member 50, so that the absorbent main body 10 (absorbent core) 11) It is easy to fit the wearer's body. That is, the absorbent main body 10 can be easily brought into close contact with the crotch of the wearer, thereby making it difficult to leak excrement such as menstrual blood.

(waist member 20)

The waist member 20 is a composite sheet formed by laminating a plurality of sheet members. Hereinafter, in this specification, the waist member 20 is also called "composite sheet 20". The composite sheet 20 of this embodiment has the non-skin side sheet 21 and the skin side sheets 22 and 23 (see FIG. 3 ). In addition, in the following description, for convenience, the part of the composite sheet 20 on the front side (abdominal side) of the central position CL in the longitudinal direction is also referred to as the front side waist part 20f, and the part behind the central position CL is referred to as the front waist part 20f. The part on the side (back side) is called the rear waist part 20b.

The non-skin side sheet 21 is a non-stretchable sheet member disposed on the non-skin side of the composite sheet 20, and is formed of, for example, a spun-bonded nonwoven fabric, an SMS nonwoven fabric, or the like. In this embodiment, as shown in the plan view of FIG. 2, the non-skin side sheet 21 has the shape narrowed toward the left-right direction inner side in the center part (part including the center position CL) in the longitudinal direction.

The skin side sheet 22 is a stretchable sheet member (stretch sheet) laminated on the skin side of the non-skin side sheet 21 on the front side (abdominal side) in the longitudinal direction, and is formed of, for example, a stretchable nonwoven fabric. "Stretchable nonwoven fabric" means a nonwoven fabric that contains stretchable fibers with stretchability and stretchable fibers with stretchability lower than that of the stretchable fibers, and is subjected to appropriate stretching such as gear stretching. stretch processing. In the skin side sheet 22 of this embodiment, fibers of a polyurethane-based elastomer which is a kind of elastic thermoplastic elastomer can be used as stretchable fibers, and fibers which are a kind of inelastic thermoplastic resin can be used. Polypropylene (PP) fibers of polyolefin resin are used as extensible fibers.

The skin side sheet 22 is bonded to the non-skin side sheet 21 by a plurality of welded portions 60 (see FIG. 2 ) arranged based on a predetermined pattern, thereby imparting at least stretchability in the left-right direction to the front waist portion 20f. That is, in the front waist part 20f, the "waist elastic region GER" which has elasticity in the left-right direction is formed in the region where the skin side sheet 22 is arrange|positioned. In the present embodiment, the welded portion 60 is formed by using known joining means such as ultrasonic welding. The welded portion 60 shown in FIG. 2 is formed by a pattern in which rectangular dots with a side of about 0.2 mm to 0.8 mm are regularly arranged at a pitch of about 1 mm to 3 mm, but the shape of the welded portion 60 and the pattern of arrangement are not the same. limited to the example in Figure 2. In addition, the welded portion 60 may be formed in a different pattern for each region of the composite sheet 20 . For example, the welded portion 60 having a pattern different from that in other regions may be formed in a region overlapping with the absorptive main body 10 .

The skin side sheet 23 is an elastic sheet member laminated on the skin side of the non-skin side sheet 21 on the rear side (back side) in the longitudinal direction. The skin side sheet 23 has the same structure as the skin side sheet 22 . That is, the skin side sheet 23 is formed of stretchable nonwoven fabric, and is bonded to the non-skin side sheet 21 by a plurality of dotted welded portions 60 (see FIG. 2 ). Thereby, in the area where the skin side panel 23 is arrange|positioned in the back side waist part 20b, similarly to the front side waist part 20f, the "waistline elastic region GER" which has elasticity in the left-right direction is formed.

In the front waist part 20f of the composite sheet 20, there is formed a front side fold back formed by folding the non-skin side sheet 21 from the skin side to the non-skin side at the upper end 20ef (front end in the longitudinal direction) in the up-down direction. Section 30 (refer to FIG. 3 ). In addition, elastic members 25 at the upper waist, such as elastic threads, are provided between the front folded portion 30 and the non-skin side sheet 21 in the thickness direction so as to be stretchable in the left-right direction. By providing such a waist upper end elastic member 25, the fit property of the front side (abdominal side) of the waist opening 1a can be improved, and the displacement of the composite sheet 20 can be suppressed when the sanitary napkin 1 is worn.

In the sanitary napkin 1, the front folded portion 30 corresponds to the "outer sheet 30" laminated on the non-skin side (outer) surface of the front waist portion 20f. The outer sheet 30 is bonded to the non-skin side sheet 21 via an adhesive such as a hot-melt adhesive applied to the outer peripheral surface of the upper end elastic member 25 . That is, the outer sheet 30 (front folded portion 30 ) has a sheet joining portion 31 joined to the non-skin side sheet 21 of the front waist portion 20f at the portion where the upper waist elastic member 25 is provided. However, instead of applying the adhesive forming the sheet joining portion 31 to the upper waist elastic member 25, the adhesive may be directly applied to predetermined areas of the outer sheet 30 and the non-skin side sheet 21.

In addition, the outer sheet 30 (front folded portion 30 ) has a sheet non-joint portion 32 not joined to the non-skin side sheet 21 at a portion adjacent to the sheet joining portion 31 in the vertical direction. . That is, the sheet non-joint portion 32 is a so-called “dry edge” portion of the outer sheet 30 that is not coated with an adhesive or the like and is not bonded to another sheet member. The sheet non-joint portion 32 has a predetermined width in the left-right direction, and in the sheet non-joint portion 32 , the outer sheet 30 can freely deform independently of the composite sheet 20 (front waist portion 20 f ). When the sanitary napkin 1 is worn, when the composite sheet 20 shrinks in the left-right direction, the non-joint portion 32 of the sheet is deformed to form a large fold-like fold, thereby forming folds around the waist as shown in FIG. 1 . side like appearance.

In addition, the lower end portion of the outer sheet 30 may be provided with a temporary fixing joining portion 33 for temporarily fixing the outer sheet 30 to the front waist portion 20f. In FIG. 2 , at a position higher than the lower end of the outer sheet 30 by a predetermined distance (for example, about 4 mm) upward, a plurality of dot-shaped temporary fixing joints 33 are provided at a predetermined interval W33 in the left-right direction. The fixed joining portion 33 is joined to the outer sheet 30 (sheet non-joining portion 32 ) and the front waist portion 20f. The temporarily fixed joint portion 33 is formed by bonding the sheet members facing each other in the thickness direction (here, the outer sheet 30 and the non-skin side sheet 21 ) to a degree that can be peeled off manually by using known bonding means or welding means. Jointed parts. By providing such a temporarily fixed joining portion 33, it is possible to suppress such a situation that the entire non-joining portion 32 of the sheet is rolled up during the manufacture of the sanitary napkin 1 or during the distribution process of the manufactured sanitary napkin 1 in the market. Difficult to form elegant ruffles.

In addition, the temporary fixing junction part 33 may be a shape other than the dot shape shown in FIG. 2. As shown in FIG. For example, a plurality of temporary fixing joints 33 formed linearly in the vertical direction (longitudinal direction) may be arranged at a predetermined interval W33 in the horizontal direction. In addition, when there is another means for suppressing that the sheet non-joining portion 32 is rolled up, the temporary fixing joint portion 33 may not necessarily be provided.

In this embodiment, the outer side sheet 30 (front side turned back portion) is formed by folding back a part of the non-skin side sheet 21 at the upper end 20ef of the front waistline portion 20f and laminating it on the non-skin side surface of the non-skin side sheet 21. 30), but the outer sheet 30 may also be a sheet member different from the non-skin side sheet 21. That is, the outer sheet 30 may be formed by laminating an independent sheet member (such as a nonwoven fabric) on the non-skin side of the non-skin side sheet 21 and partially joining them.

On the other hand, as shown in FIG. 3 , at the rear side waistline portion 20b of the composite sheet 20, a non-skin side sheet 21 is formed by separating the non-skin side sheet 21 from the non-skin side sheet at the upper end 20eb (rear end in the longitudinal direction) in the up-down direction. The rear folded portion 40 is formed by folding back toward the skin side. A part of the skin side panel 23 may be folded back together with the non-skin side panel 21 in the rear side folded portion 40 . In the rear side folded portion 40, between the skin side panels 23 and 23 folded back at the upper end 20eb in the thickness direction, a plurality of elastics are provided in a manner that can expand and contract in the left and right directions, similarly to the front waist portion 20f. The elastic member 25 at the upper end of the waist such as the rib line. By providing such a waist upper end elastic member 25, the fit property of the rear side (back side) of the waist opening 1a can be improved, and the displacement of the composite sheet 20 can be suppressed when the sanitary napkin 1 is worn.

The rear folded portion 40 has a rear sheet joining portion 41 joined to at least any one of the rear waist portion 20b and the absorbent main body 10 on the rear side (back side) in the front-rear direction (thickness direction). Moreover, the rear side sheet non-joint part 42 which is not connected to the rear side waist part 20b and the absorbent main body 10 is provided in the part adjacent to the back side sheet joining part 41 in the up-down direction. At least any one of them is engaged.

When forming the sanitary napkin 1 of an underpants shape, from the unfolded state shown in FIG. The composite sheet 20 is folded in half in the longitudinal direction (front-back direction). In this folded state, using known joining means such as sealing welding, the lateral direction (left-right direction) both ends 20fe, 20fe of the front side waist part 20f overlapping in the front-rear direction are connected to the lateral direction of the rear side waist part 20b. (Left-right direction) both end parts 20be and 20be are joined, and the side joint part 20we is formed. Thus, the composite sheet 20 (waist body part 20f and waist body part 20b) folded in half is connected in a ring shape on the front side (abdomen side) and the rear side (back side), forming a waist opening 1a and a waist opening 1a as shown in FIG. Openings 1b, 1b are formed around the legs to form a panty type (shorts type) sanitary napkin 1 .

＜About the dry edge formed on the sanitary napkin 1＞

As already described in Fig. 3, in the sanitary napkin 1 of the present embodiment, the front side waist portion 20f of the composite sheet 20 (waist member 20) is laminated on the non-skin side (non-skin side sheet 21). There is an outer sheet 30 (front folded portion 30). A part of the outer sheet 30 is joined to the non-skin side sheet 21 by the sheet joining portion 31, but the sheet non-joining portion 32 adjacent to the sheet joining portion 31 in the up-down direction becomes a dry area not joined to the non-skin side sheet 21. side. Therefore, when the sanitary napkin 1 is worn, the front waist portion 20f, which is stretchable by the waist elastic region GER, contracts in the left-right direction, whereas the non-joint portion 32 of the sheet material is less likely to shrink in the left-right direction, forming a plurality of creases. shaped folds for a ruffle-like appearance.

Also, in the outer sheet 30 (the front folded portion 30 ), it is preferable that the dry edge formed in the sheet non-joint portion 32 has a certain size. For example, in FIG. 3 , if the length L32 of the sheet non-joint portion 32 (dry side) of the outer sheet 30 in the vertical direction (longitudinal direction) is too small, the frill formed by the dry side is difficult to be noticed, and thus It may be difficult to be visually recognized by the user.

Specifically, it is preferable that the length L32 of the sheet non-joining portion 32 in the vertical direction (longitudinal direction) be 5 mm or more and 25 mm or less in the extended sanitary napkin 1 . If the length L32 of the sheet non-joint portion 32 is shorter than 5 mm, the creases (frills) formed on the sheet non-joint portion 32 will be small and unnoticeable, and it will be difficult to distinguish them from those formed on the composite sheet 20 (front waist portion). 20f) are distinguished from other folds on the surface. On the other hand, if the length L32 of the sheet non-joining portion 32 is longer than 25 mm, there is a risk that the sheet non-joining portion 32 will sag downward due to its own weight, making it difficult to form hems three-dimensionally. On the other hand, when the composite sheet 20 (front side waist part 20f) shrinks by making length L32 of the sheet non-joining part 32 into 5 mm or more and 25 mm or less, it becomes easy to three-dimensionally form the hem of an appropriate size. Thereby, it becomes easy for a user to visually recognize elegant frills.

On the other hand, since the composite sheet 20 (waist body member 20) has a structure in which the non-skin side sheet 21 and the skin side sheet 22 (23) are laminated and joined in the thickness direction, there may be a gap between the joint ends of these sheet members. part to form a dry edge. For example, there are cases where the non-skin side sheet 21 and the skin side sheet 22 (23) are formed on the leg opening edge 1be (hereinafter also simply referred to as "opening edge 1be") as the outer edge of the leg opening 1b of the sanitary napkin 1. Unjoined dry edges. FIG. 6 is an enlarged view showing the area X in FIG. 2 , and is a view explaining the dry edge formed at the leg opening edge 1be.

In the sanitary napkin 1, the leg opening 1b is formed by using a belt in a state where the non-skin side sheet 21 and the skin side sheet 22 (23) are joined to each other by a welded portion 60 (corresponding to a “composite sheet joining portion”). The predetermined area of the sheet member (composite sheet) is cut. That is, the cutting line at the time of cutting out the part which becomes the leg opening 1b from the rectangular-shaped composite sheet becomes the opening edge 1be. In addition, in the composite sheet 20, a region represented by a distance g60 between the opening edge 1be and a certain welded portion 60 disposed adjacent to the opening edge 1be becomes a dry area where the non-skin side sheet 21 and the skin side sheet 22 are not joined. side. In other words, in the composite sheet 20, the distance g60 between the opening edge 1be and the welded portion 60 (composite sheet joining portion) is the length of the dry side formed at the leg opening edge 1be.

Here, the some welding part 60,60... which joins the non-skin side sheet 21 and the skin side sheet 22 (23) is discretely arrange|positioned in the fixed pattern as shown in FIG. Therefore, when the composite sheet is cut to form the opening edge 1be, the distance g60 between the opening edge 1be and the welded portion 60 has a different length for each welded portion 60 provided with a plurality of welded portions 60 . For example, when the opening edge 1be passes a position overlapping with the welded part 60, the distance g60 is zero, and the length of the dry side at this part of the opening edge 1be is zero. On the other hand, the farther the opening edge 1be passes from the welding portion 60 , the longer the distance g60 is, and the dry side at the opening edge 1be becomes larger accordingly.

In such an underpants type sanitary napkin 1, it is preferable that the dry edge formed on the leg opening edge 1be is as small as possible. Fig. 7 is a diagram illustrating the state of the dry edge of the leg opening edge 1be when the sanitary napkin 1 is worn.

When the sanitary napkin 1 is worn, the skin side sheet 22 ( 23 ) in the composite sheet 20 (waistline member 20 ) is in contact with the wearer's body (skin). At this time, when a dry edge is formed in the outer edge part (opening edge 1be) of the composite sheet 20, some sheet|seat members which comprise the composite sheet 20 may be rolled up by this dry edge. In Fig. 7, at the lower end portion (leg circumference opening 1b) of the composite sheet 20, a dry edge is formed in the region of the length g60 from the opening edge 1be, and at the dry edge, the skin side sheet 22 (23) rolls toward the skin side. rise. The rolled-up skin side panels 22 (23) are sandwiched between the wearer's skin and the composite sheet 20 (waist member 20), and rub against the wearer's skin due to the movement of the wearer's body, thereby easily giving the wearer a Discomfort, discomfort.

Especially whenever the wearer moves his legs while walking, the leg circumference opening 1b in the composite sheet 20 may rub against the wearer's leg circumference portion. Therefore, if a dry edge is formed at this portion (opening edge 1be), It is easy to cause discomfort to the wearer. Therefore, it is desirable to make the length (g60) of the dry side formed at the leg opening edge 1be as short as possible so as not to cause discomfort to the wearer.

Accordingly, in the sanitary napkin 1 of the present embodiment, in the stretched composite sheet 20, the minimum value of the distance (L32) in the vertical direction of the sheet non-joint portion 32 (hem) is adjusted to be greater than that of the opening edge. The minimum value of the distance (g60) between 1be and the welding part 60 (composite sheet joining part) is large (L32>g60). According to such a structure, compared with the opposite case (L32<g60), in the composite sheet 20, the dry edge (g60) formed at the opening edge 1be of the leg opening 1b is relatively small, and it is possible to suppress the damage caused by walking, etc. The fact that the dry edge rubs against the wearer's skin (legs) can make it less likely that the wearer will feel uncomfortable. In addition, since the dry edge (L32) formed on the outer sheet 30 is relatively large, it is easy to form a large hem, and the sanitary napkin 1 having a good appearance can be realized.

In addition, the said relationship (L32>g60) is the same also when forming a composite sheet joining part using the joining means other than the welding part 60. For example, in the case of joining the non-skin side sheet 21 and the skin side sheet 22 (23) by means of an adhesive such as a hot-melt adhesive, the non-joining portion 32 of the outer sheet 30 is It is preferable that the dry side length L32 is longer than the minimum value of the distance g60 between the opening edge 1be and the joint portion of the composite sheet formed of the adhesive.

In addition, as already described in FIG. 6 , the length of the distance g60 between the opening edge 1be and the composite sheet joining portion may vary depending on the arrangement of the welded portion 60 and the opening edge 1be. Therefore, in the stretched composite sheet 20, it is preferable that the minimum value of the distance (L32) in the vertical direction of the sheet non-joint portion 32 is greater than the distance (g60) between the opening edge 1be and the composite sheet joint portion. The maximum value is large.

In this embodiment, the maximum value of the dry side length g60 of the opening edge 1be is the maximum length of the pitch of the adjacent welded portions 60 , 60 and is about 3 mm. On the other hand, since the length L32 of the sheet non-joint portion 32 (hem) of the outer sheet 30 is not less than 5 mm and not more than 25 mm, the minimum value of L32 is about 5 mm. Therefore, even when the dry side length g60 of the opening edge 1be is the maximum, the relationship of (L32>g60) is maintained. Thereby, the wearer is less likely to feel uncomfortable at the leg opening 1b, and a large hem is easily formed at the sheet non-joining portion 32, so that the appearance of the sanitary napkin 1 can be improved.

The relationship between the size of the hem and the dry edge formed at the opening edge 1be of the leg opening 1b has been described, but in the sanitary napkin 1, the size of the hem and the dry edge formed at a position other than the leg opening edge 1be On the other hand, the same relationship holds. FIG. 8 is an enlarged view showing the region Y in FIG. 2 , and is a view illustrating dry edges formed at the boundary between the skin side sheet 22 and the non-skin side sheet 21 in the front waistline portion 20f.

As shown in Fig. 2 and Fig. 3, there is the following situation: the length of the skin side sheet 22 (23) forming the composite sheet 20 (waist body member 20) in the up and down direction (longitudinal direction) is longer than that of the non-skin side sheet 21 in the up and down direction ( The length on the longitudinal direction) is short, and forms dry edge at the lower end portion of skin side panel 22 (23). In Fig. 8, in the region represented by the distance g60 between the welded portion 60 (composite sheet joint) and the lower end 22eb of the skin side sheet 22, it becomes the dry edge where the skin side sheet 22 and the non-skin side sheet 21 are not joined. . That is, a dry edge is formed in the boundary part of the laminated part where the skin side sheet 22 and the non-skin side sheet 21 were laminated, and the non-laminated part where both were not laminated|stacked. This region is a portion that contacts the wearer's skin when wearing the sanitary napkin 1, so if the dry edge formed at this boundary portion is large, the dry edge may be rolled up as described in FIG. 7 . And rub against the skin of the wearer, thus causing discomfort to the wearer.

On the other hand, in the sanitary napkin 1 of the present embodiment, the minimum value of the vertical distance (L32) of the sheet non-joint portion 32 (hem) of the outer sheet 30 is higher than that of the skin side sheet 22 (23) and the non-joint portion 32 (hem). The minimum value of the distance g60 between the laminated portion of the skin side sheet 21 and the non-laminated portion (in FIG. 8 being the lower end 22eb of the skin side sheet 22) and the welded portion 60 (composite sheet junction) is large (L32>g60 ). As a result, the dry edge formed at the boundary (22eb) between the laminated portion and the non-laminated portion of the composite sheet 20 is relatively small, so that the dry edge can be prevented from rolling up and rubbing against the wearer's skin when the sanitary napkin 1 is worn. , can not easily cause discomfort to the wearer. In addition, since the dry edge ( L32 ) formed in the non-joint portion 32 (hem) of the sheet is relatively large, it is easy to form a large hem, and a sanitary napkin 1 having a good appearance can be realized.

In addition, although the dry edge formed at the lower end 22eb of the skin side sheet 22 has been described in FIG. 8 , in the composite sheet 20, the laminated portion and The same applies to other dry edges formed by the boundary of the non-laminated portion. For example, in FIG. 3 , in the case where the boundary between the lamination portion and the non-lamination portion is formed on the upper end portion (near 20ef) of the skin side sheet 22, it is assumed that the dry edge (L32) formed on the outer sheet 30 (hem) ) is longer than the length (g60) of the dry side at the boundary.

In addition, in the composite sheet 20 (waist member) of the sanitary napkin 1, a dry edge is also formed on the outer side in the left-right direction of the side joint portion 20we joining the front waist portion 20f and the rear waist portion 20b. As already explained in FIG. 2 , the composite sheet 20 (waist body member) has side joints 20we formed by connecting the left-right end 20fe of the front waist portion 20f and the rear waist portion 20b. The left-right direction end part 20be is joined so that it may overlap in the thickness direction. In addition, the side joint part 20we is set to be apart from the outermost end in the left-right direction of the composite sheet 20 (front side waist part 20f and back side waist part 20b) by a predetermined distance inward. That is, in a region represented by the distance g20we between the lateral end of the composite sheet 20 in the stretched state and the lateral end of the side joining portion 20we in the lateral direction, a front waist portion 20f and a rear waist portion 20f are formed. The unjoined dry edge of the waist portion 20b (see FIG. 2 ).

As shown in FIG. 1, the side joining portion 20we is formed to extend long in the vertical direction, so if the dry edge formed outside the side joining portion 20we is too large, the folds formed by the sheet non-joining portion 32 will Edges can be difficult to notice. On the other hand, in this embodiment, adjustment is made such that the minimum value of the length g20we of the dry edge formed outside the side joint portion 20we is greater than the vertical distance (L32) of the sheet non-joint portion 32 (hem). The minimum value of is small (L32>g20we). Thereby, compared with the opposite case (L32<g20we), the side joint part 20we is less noticeable, and it becomes easy for a user to visually recognize a hem. Therefore, the external appearance of the sanitary napkin 1 can be improved.

Next, the dry edge formed on the absorptive main body 10 will be described. As shown in FIG. 5 , on the skin side of the absorptive main body 10 , end portions 15 t and 15 t formed by bending the side sheet 15 are arranged on both sides in the left-right direction. The side panel ends 15t, 15t are joined to the sheet member (top sheet 12 in FIG. 5 ) facing the side panel ends 15t, 15t on the non-skin side in the thickness direction via the end joining portion 71 . In addition, the end joining portion 71 is formed by applying an adhesive such as a hot-melt adhesive in a strip shape in the longitudinal direction (the longitudinal direction of the absorbent main body 10 ). At this time, in the left-right direction (transverse direction), in the region represented by the distance g15t between the inner end 71ei of the end joint 71 and the top end (inner end) 15te of the side sheet end 15t, the side sheet end 15t and The topsheet 12 is not joined. That is, a dry edge is formed in the front-end|tip part (inner side edge part) in the left-right direction of the side panel edge part 15t.

The side sheet end 15t of the absorbent main body 10 is arranged on the skin side of the top sheet 12 (see FIG. 5 ), and is a portion that contacts the wearer's body (skin) when the sanitary napkin 1 is worn. Therefore, when a dry edge is formed at the top end (inner end) of the side sheet end 15t, the dry edge may be rolled up and rubbed against the wearer's skin, thereby causing discomfort and discomfort to the wearer. . In particular, since the side panel ends 15t are in contact with sensitive parts such as the crotch portion and the groin portion of the wearer when wearing the sanitary napkin 1, if friction occurs, it is easy to cause a large degree of discomfort to the wearer. pleasure.

Therefore, in the sanitary napkin 1, the minimum value of the length g15t of the dry edge formed at the top end (the inner end in the left-right direction) of the side sheet end 15t in the absorbent main body 10 in the stretched state is adjusted to be greater than that of the sheet. The minimum value of the vertical distance (L32) of the material non-joint portion 32 (hem) is small (L32>g15t). Thus, compared with the opposite case (L32<g15t), the dry edge (g15t) formed on the side sheet end portion 15t of the absorbent main body 10 is relatively small, so that it is possible to prevent the dry edge from interfering with the wearer's skin (the crotch). The situation of rubbing against the neck, groin, etc.) can hardly cause discomfort to the wearer. In addition, since the dry edge (L32) formed on the outer sheet 30 is relatively large, it is easy to form a large hem, and the external appearance of the sanitary napkin 1 can be improved.

Moreover, in the sanitary napkin 1, dry edges may be formed also in the junction part of the absorptive main body 10 and the composite sheet (waistline member) 20. FIG. 9 is a diagram illustrating a joining portion between the absorbent main body 10 and the composite sheet 20 . In this FIG. 9 , the main body joining portion 80 for joining the absorbent main body 10 is shown by hatching in the expanded composite sheet 20 . The body joining portion 80 is formed by applying an adhesive such as a hot-melt adhesive to a predetermined region (the region indicated by the shaded portion in FIG. 9 ) of the composite sheet 20 or the absorbent body 10 . In addition, the adhesive forming the main body joint portion 80 may be unevenly applied to the entire hatched portion in FIG. 9 . For example, the adhesive may be applied to the region indicated by the shaded portion in FIG. 9 by known spiral coating, Ω coating, or the like.

In the left-right direction (lateral direction) of FIG. 9 , no adhesive is applied in a region indicated by a distance g80 between the outer end of the absorbent main body 10 and the outer end of the main body joint portion 80 . That is, in this area|region (g80), the edge part of the left-right direction of the absorptive main body 10 and the dry side which the composite sheet 20 is not joined are formed. In addition, the end region in the left-right direction of the absorbent main body 10 is a part that abuts the wearer's buttocks and around the thighs when wearing the sanitary napkin 1. If the skin rubs, it may cause discomfort and discomfort to the wearer.

Therefore, in the sanitary napkin 1, it is adjusted so that the minimum value of the length g80 of the dry edge formed at the outer end portion in the left-right direction of the absorbent main body 10 in the stretched state is higher and lower than the non-joint portion 32 (hem) of the sheet. The minimum value of the distance (L32) in the direction is small (L32>g80). Thus, compared with the opposite case (L32<g80), the dry edges formed on both sides in the left-right direction of the absorbent main body 10 are relatively small, and the dry edges can be prevented from interfering with the wearer's skin (buttocks, buttocks, etc.). around the thighs, etc.) can make the wearer less likely to feel uncomfortable. In addition, since the dry edge (L32) formed on the outer sheet 30 is relatively large, it is easy to form a large hem, and the external appearance of the sanitary napkin 1 can be improved.

Moreover, in the sanitary napkin 1 in a natural state, a plurality of creases along the longitudinal direction as shown in FIG. 1 are formed on the non-skin side surface (non-skin side) of the composite sheet 20 . Such gathers are formed as follows: when the composite sheet 20 shrinks in the left-right direction due to the stretching force exhibited by the waist elastic region GER, the non-stretchable non-skin side sheet 21 is slack, so that it is concave-convex in the thickness direction. out of shape. In addition, when the height of the gathers in the thickness direction is hwr, in the sanitary napkin 1 of the present embodiment, the maximum value of the height hwr is set to be greater than the vertical distance of the sheet non-joining portion 32 (hem) ( The minimum value of L32) is small (L32>hwr).

When the height hwr of the wrinkles formed on the surface of the composite sheet 20 is longer than the length L32 of the hem, the hem may be hard to be noticed. In addition, since high creases are formed on the non-skin side of the composite sheet 20, friction between the creases and the skin side of the wearer's clothes is large, and the wearing comfort of the sanitary napkin 1 may be deteriorated. On the other hand, in this embodiment, the height of the gathers formed on the non-skin side of the composite sheet 20 is relatively low, so that it is possible to prevent the gathers from becoming more noticeable than the hems or causing friction between the gathers and the wearer's clothes. . In addition, since the dry edge (L32) formed on the outer sheet 30 is relatively large, it is easy to form a large hem, and the external appearance of the sanitary napkin 1 can be improved.

Next, a specific structure of the hem formed by the sheet non-joint portion 32 (dry edge) of the outer sheet 30 in the sanitary napkin 1 will be described. Fig. 10 is a schematic cross-sectional view showing the structure of the panty-shaped sanitary napkin 1 cut in the vicinity of the center in the left-right direction. In this FIG. 10, each member (composite sheet 20 etc.) which comprises the sanitary napkin 1 is stretched.

In addition, in the sanitary napkin 1, at the upper end 20ef of the front waist portion 20f, the non-skin side sheet 21 is folded back toward the non-skin side and downward (forming the front folded portion 30), thereby forming the outer sheet 30 (sheet Material non-joint part 32). According to such a structure, in the manufacturing process of the sanitary napkin 1, the work of preparing an additional material (sheet member) for forming the outer sheet 30 and joining it to the front waist portion 20f can be reduced. In addition, the waist upper end elastic member 25 is sandwiched and joined between the non-skin side sheet 21 and the front folded part 30 in the thickness direction, whereby the sheet joining part 31 and the like can be easily formed, thereby enabling hygiene. The manufacturing process of the towel 1 is highly efficient. That is, the manufacturing cost and man-hours of the sanitary napkin 1 can be reduced.

Moreover, in the sanitary napkin 1, the outer side sheet 30 (sheet non-joint part 32) is provided in front side waist part 20f which is the front side in the front-back direction in the composite sheet 20. Therefore, when the sanitary napkin 1 is worn, frills are formed on the abdomen side of the wearer, and the user (wearer) can easily visually recognize the frills. In addition, when the sanitary napkin 1 is taken out from the package at the stage of using the sanitary napkin 1, frills are arranged on the front side of the sanitary napkin 1, so that it is easy to know the existence of the frills at a glance, and it is possible to provide the user with a high design quality. Good impression such as underwear.

On the other hand, in the sanitary napkin 1, the non-skin side sheet 21 (and the skin side sheet 23) is folded back toward the skin side and downward at the upper end 20eb of the rear waistline portion 20b, thereby forming the rear side folded portion 40. . Moreover, the lower end part of the rear side folded part 40 is arrange|positioned so that the upper end 10eb of the rear side of the absorptive main body 10 may overlap when seen along the front-back direction (thickness direction). Therefore, when the sanitary napkin 1 is worn, the rear folded portion 40 exists between the rear upper end 10eb of the absorbent main body 10 and the wearer's skin (buttocks). This prevents the edge (upper end 10eb) of the upper end of the absorbent main body 10 from being directly pressed against the wearer's skin, making it difficult for the wearer to suffer discomfort due to the hardness of the edge of the absorbent main body 10. Pleasure, discomfort. In addition, by covering the rear upper end 10eb of the absorbent main body 10 with the rear folded portion 40, it is possible to suppress excrement such as menstrual blood from moving rearward along the absorbent main body 10 and leaking outward from the upper end 10eb (so-called rear end 10eb). leak).

In addition, when the sanitary napkin 1 has a structure as shown in FIG. 10, it is preferable that the length L32 of the sheet non-joint portion 32 of the front folded portion 30 (outside sheet 30) in the vertical direction (longitudinal direction) is longer than that of the rear. The length L42 in the up-down direction (longitudinal direction) of the rear side sheet non-joining portion 42 of the side turnback portion 40 is long ( L32 > L42 ). As described above, if the length L32 of the sheet non-joint portion 32 is short on the front side (abdominal side) of the sanitary napkin 1, frills may become difficult to be noticed. In addition, if the rear side sheet non-joint portion 42 is long on the rear side (back side) of the sanitary napkin 1, there is a risk that when the sanitary napkin 1 is worn, the rear side sheet non-joint portion 42 is rolled up. When the wearer moves his body, the rear sheet non-joint portion 42 and the wearer's skin (buttocks) rub against each other, causing discomfort to the wearer. On the other hand, by setting L32>L42, a relatively large hem is formed in the front side (abdominal side) of the sanitary napkin 1 by the sheet non-joint part 32, and the design property of an external appearance improves. In addition, since the rear side sheet non-joint portion 42 is relatively small on the rear side (back side), it is less likely to rub against the wearer's skin, so that discomfort to the wearer can be suppressed.

Moreover, the surface of the non-skin side sheet 21 which comprises the composite sheet 20 is dotted with the some embossing (compressed part) formed at the time of manufacture of a nonwoven fabric. For example, in the process of producing a spunbonded nonwoven fabric, a fiber web formed by accumulating long fibers is subjected to embossing such as thermocompression bonding, and is compressed in the thickness direction to be bonded into a sheet. The embossing (compressed part) formed at this time is usually arrange|positioned so that the dot (not shown) of the predetermined shape of a rectangular shape or a circular shape may be arranged adjacently at the pitch of about 0.5 mm - 3 mm.

In the sanitary napkin 1, the length L32 (5 mm or more) of the sheet non-joint portion 32 in the vertical direction is greater than the pitch (0.5 mm to 3 mm) of the embossing (compressed portion) provided in the manufacturing stage of the nonwoven fabric as described above. )long. According to such a structure, a plurality of fine embossings are arranged on the surface of the nonwoven fabric constituting the outer sheet 30 (sheet non-joining portion 32), so it is easy to use the embossing to form a bending starting point, so that the sheet non-joining portion 32 deforms easily and freely. Therefore, more natural and soft hems can be easily formed.

In addition, in the area between the pair of side joints 20we, 20we (20fe, 20be) provided at both ends in the left-right direction of the composite sheet 20, a plurality of temporary fixings are provided at a predetermined interval W33 in the left-right direction. The joining part 33 which temporarily fixes the joining part 33 joins the non-skin side sheet 21 and the sheet non-joining part 32 of the outer side sheet 30 (refer FIG. 2). By temporarily fixing the outer sheet 30 to the composite sheet 20 by the temporarily fixing joint part 33, it can suppress that the entire sheet non-joining part 32 is rolled up. In addition, when the sheet non-joint portion 32 (outer sheet 30) shrinks with the composite sheet 20 shrinking in the left-right direction to form folds (hems), the sheet non-joint portion 32 is formed at equal intervals. Temporary fixing is performed so that the shrinkage width of the sheet non-joining portion 32 becomes easy to be uniform. That is, in the sheet non-joint portion 32, a plurality of regions at equal intervals (W33) defined by two temporarily fixed joint portions 33, 33 adjacent to each other in the left-right direction are arranged in a plurality in the left-right direction, so that such a situation can be suppressed. Situation: When each of the divided regions shrinks and deforms, wrinkles with extremely different widths in the left and right directions are formed. This makes it possible to easily form hems with a uniform shape.

On the other hand, in the composite sheet 20, the temporarily fixed joining part 33 does not need to be provided. That is, the sheet non-joint part 32 may be continuous between a pair of side joining part 20we, 20we provided in the left-right direction of the composite sheet 20 at both ends. In this case, the outer sheet 30 (sheet non-joining portion 32 ) can be freely deformed in a wide range from one end side to the other end side in the left-right direction, so when the sheet non-joining portion 32 shrinks The resulting pleats tend to take a more natural shape, allowing for soft-textured ruffles.

Moreover, the sheet non-joint part 32 is arrange|positioned at the upper side than the intermediate position 20cf of the upper end 20ef of the front side waist part 20f and the upper end 11ef of the front side of the absorptive core 11 in the up-down direction (refer FIG. 10). Therefore, compared with the case where the sheet non-joint part 32 is arranged on the lower side than the intermediate position 20cf, the sheet non-joint part 32 is less likely to be affected by the absorbent core 11 with high rigidity, and it is easy to form a shape. Uniform ruffles. Also, since the frills are formed near the upper end of the front waist portion 20f near the waist opening 1a of the sanitary napkin 1, the frills are easily noticed and visually recognized by the user. Thereby, it becomes easy to make the appearance of the sanitary napkin 1 close to that of underwear.

In addition, in the outer sheet 30 , the vertical length L32 of the sheet non-joining portion 32 is preferably equal to or greater than the vertical length L31 of the sheet joining portion 31 (L32≧L31). In the outer sheet 30, assuming that the length L31 of the sheet joining portion 31 is longer than the length L32 of the sheet non-joining portion 32, there is a risk that when the composite sheet 20 shrinks in the left-right direction, 31 The area of the shrunk portion of the joined outer sheet 30 becomes larger, so that the formed hem is also smaller and easily shrunk. On the other hand, if the length L32 of the sheet non-joint portion 32 is greater than or equal to the length L31 of the sheet-joint portion 31, when the composite sheet 20 shrinks in the left-right direction, the portion (the sheet-joint portion) in the outer sheet 30 that tends to shrink 31) is smaller than the area of the hard-to-shrink portion (sheet non-joint portion 32 ), so that a large hem is easily formed accordingly. Thereby, it becomes easy to make the appearance of the sanitary napkin 1 close to that of underwear.

＜Modifications＞

Fig. 11 is a schematic cross-sectional view showing a first modification of the sanitary napkin 1, corresponding to Fig. 10 . In the first modified example shown in FIG. 11 , the outer sheet 30 provided on the non-skin side of the front waist portion 20 f is composed of a sheet member 34 different from the non-skin side sheet 21 . That is, the outer panel 30 is not formed by the front folded portion 30 formed by folding the non-skin side panel 21 to the non-skin side at the upper end 20ef of the front waist portion 20f, but is formed by an independent sheet member 34. Outer sheet 30.

The sheet member 34 (outer sheet 30 ) is joined to the non-skin side (non-skin side sheet 21 ) of the front waist portion 20 f via the sheet joining portion 31 . In Modification 1, for example, the sheet joining portion 31 can be formed by an adhesive applied to the surface of the upper waist elastic member 25 as described in FIG. 3 and the like. Moreover, the sheet non-joint part 32 in which the sheet member 34 (outside sheet 30) and the non-skin side sheet 21 are not joined is formed in the area adjacent to the sheet joint part 31 in the up-down direction. In addition, when the composite sheet 20 is shrunk when the sanitary napkin 1 is worn, the sheet non-joint portion 32 forms folds, thereby exhibiting an appearance like frills similarly to the above-mentioned embodiment.

In addition, in FIG. 11 , a sheet joining portion 31 is formed on the upper end side in the up-down direction of the sheet member 34 (outer sheet 30 ), and a sheet non-joining portion 32 is formed on the lower end side. The disposition of the non-joint portion 32 may also vary. For example, the sheet non-joint portion 32 may be formed on the upper end side of the sheet member 34 (outer sheet 30 ), or the sheet non-joint portion 32 may be formed at both ends in the vertical direction.

Fig. 12 is a schematic cross-sectional view showing a second modified example of the sanitary napkin 1, corresponding to Fig. 10 . In the second modified example shown in FIG. 12 , elastic members 35 such as elastic threads that expand and contract in the left-right direction are provided on the sheet non-joint portion 32 of the outer sheet 30 . Specifically, after the non-skin side sheet 21 is folded back toward the non-skin side at the upper end 20ef of the front waist portion 20f, it is folded back toward the skin side again at the lower end 30et of the front side folded portion 30, whereby the outer sheet 30 becomes Two-layer construction, and the elastic member 35 is configured to be sandwiched between the two-layer construction. However, when disposing the elastic member 35 in the sheet non-joining portion 32, the outer sheet 30 does not necessarily need to have a two-layer structure.

In the second modified example of FIG. 12 , the elastic member 35 is arranged such that the stretching force exhibited by the elastic member 35 (as a "second elastic member") provided at the sheet non-joining portion is higher than that at the sheet joining portion 31. The elastic force exhibited by the waist upper end elastic member 25 (as "the first elastic member") is low. That is, the elastic member 35 (the second elastic member) is set so that the stress ratio when the elastic member 35 (the second elastic member) is extended by the unit length makes the waist upper end elastic member 25 (the first elastic member) be extended by the unit length. When the stress is small. For example, by setting the thickness of the elastic thread constituting the elastic member 35 to about half the thickness of the elastic thread constituting the elastic member 25 at the waist upper end, and setting the elongation ratio of the elastic member 35 to that of the elastic member 25 at the upper waist end. About half of the elongation magnification of the elastic member 35 can be adjusted.

By arranging the elastic member 35 (second elastic member) with low stretchability in the sheet non-joint portion 32 of the outer sheet 30, it is possible to easily correct the folded folds (hems) formed in the sheet non-joint portion 32. shape is controlled. For example, when the composite sheet 20 shrinks in the left-right direction, the non-joint portion 32 of the sheet is gradually shrunk at the portion where the elastic member 35 (second elastic member) is provided to forcibly form wrinkles. At this time, the sheet non-joint portion 32 provided with the second elastic member is less likely to shrink compared with the sheet joint portion 31 provided with the first elastic member, so the wrinkles (pleats) formed in the sheet non-joint portion 32 can be made to shrink. side) is larger than the wrinkles formed in the sheet joining portion 31 . In this way, by appropriately adjusting the elastic member 35 (second elastic member) relative to the size of the stretching force of the upper waist elastic member 25 (first elastic member), the size of the formed pleats can be changed, so it is easy to form the desired shape. The shape (size) of the frill.

＜About the package of sanitary napkin 1＞

For the sanitary napkin 1, it is made into a package (also called "individual package") that is individually packaged with a predetermined packaging material in a folded smaller state, and is packaged in one or more separate packages. Packages are distributed on the market in a packaged state (not shown). Next, the package (package of absorbent article) of the sanitary napkin 1 will be described.

13A to 13D are diagrams illustrating a folding method for packaging the sanitary napkin 1 . 14A to 14C are diagrams illustrating a method of wrapping the sanitary napkin 1 in a folded state.

When folding the sanitary napkin 1 for packaging, first, as shown in FIG. 13A , the panty-shaped sanitary napkin 1 is placed on a plane so that the rear side (rear waist portion 20b) in the front-rear direction is oriented vertically upward. superior. Then, the both side parts in the left-right direction of the composite sheet 20 are folded inward from outer side by a pair of 1st bending line F11, F12 along an up-down direction (vertical direction). At this time, as shown by the arrow of FIG. 13A, the composite sheet 20 is folded so that the rear side waist part 20b may become the inner side in the thickness direction. In addition, the first bending lines F11 and F12 do not need to be parallel to the vertical direction, but may be inclined to some extent.

Next, as shown in FIG. 13B , the composite sheet 20 and the absorptive main body 10 are folded in half in the up-down direction by the second bending line F2 along the left-right direction. The sanitary napkin 1 folded in this way is in a compact folded state of a substantially rectangular shape as shown in FIG. 13C . In the sanitary napkin 1 in the folded state, the rear waist portion 20b is folded inward and the front waist portion 20f is exposed outward (atmosphere side).

In addition, FIG. 13D shows the state of the sanitary napkin 1 in the folded state shown in FIG. 13C seen from the opposite surface (front side). In this FIG. 13D , at the upper end portion of the sanitary napkin 1 in the folded state, part of the hem formed by the sheet non-joining portion 32 of the outer sheet 30 is exposed outward.

The folded sanitary napkin 1 is individually packaged with a packaging material 110 made of a predetermined sheet member such as a nonwoven fabric or a film. When packaging the sanitary napkin 1 , the folded sanitary napkin 1 is placed near the center of the packaging material 110 as shown in FIG. 14A . At this time, the sanitary napkin 1 in the folded state is stacked and arranged on the packaging material 110 so that the exposed surface of the hem (sheet non-joint portion 32 ) shown in FIG. 13D faces the packaging material 110 . Then, using a pair of wrapping material bending lines FS1 and FS2 along the up-down direction (longitudinal direction), both sides in the left-right direction of the wrapping material 110 are bent from the outside to the inside, thereby wrapping the sanitary napkin 1 in the Packed inside.

Next, as shown in FIG. 14B , the folded packaging material 110 is joined at a portion where both sides in the left and right directions overlap each other in the thickness direction by the first packaging material joining portion 111 along the vertical direction. Moreover, both ends in the up-down direction of the packaging material 110 are joined by a pair of 2nd packaging material joining part 112,112 along a left-right direction. Thereby, the sanitary napkin 1 in the folded state is packaged by the packaging material 110 into a package (individual package) of the sanitary napkin 1 . The sanitary napkin 1 in the individually packaged state passes through the packaging material 110 so that foreign matter cannot enter, so that the sanitary napkin 1 is not easily damaged during circulation, and the absorption performance is not easily deteriorated. That is, it is possible to suppress deterioration in the quality and performance of the sanitary napkin 1 until the user takes the individual package and opens it.

Fig. 14C is a schematic cross-sectional view showing a D-D cross-section in Fig. 14B. As shown in FIG. 14C , in the packaging body of the sanitary napkin 1 , it is arranged such that a part of the sheet non-joint portion 32 (hem) of the outer sheet 30 is in contact with the packaging material 110 . In this state, it is preferable that at least a part of the non-skin side surface of the sheet non-joining portion 32 is in contact with the packaging material 110 . Assuming that the entire skin side of the sheet non-joining portion 32 is in contact with the packaging material 110 , the sanitary napkin 1 is packaged in a state where the entire sheet non-joining portion 32 is rolled up. In this case, there is a risk that the ruffles will be shaped in a rolled-up state during distribution, and it may be difficult to form uniform and elegant ruffles when the user unseals the package of the sanitary napkin 1 .

On the other hand, if packaging is performed with at least a part of the non-skin side surface of the sheet non-joining portion 32 in contact with the packaging material 110 , it is possible to prevent the hem from being set in a rolled-up state. Therefore, when the user unseals the package body of the sanitary napkin 1, uniform and elegant hems are easily formed.

However, at this time, the sanitary napkin 1 may be packaged in a state where a part of the skin-side surface of the sheet non-joining portion 32 is in contact with the packaging material 110 . That is, packaging may be performed in a state where the frills are partially rolled up. When packaging is performed with the entire non-skin side of the sheet non-joint portion 32 in contact with the packaging material 110, it is easy to set the hems in a state where the frills are not rolled up at all. In this case, there is a risk that the frills will be crushed and difficult to open, making it difficult to form three-dimensional frills at the time of unsealing. On the other hand, if the skin-side surface of the non-joining portion 32 of the sheet is partially in contact with the packaging material 110 for packaging, it is possible to suppress the entire hem from being crushed in the thickness direction, and it is easy to form a uniform hem. And beautiful ruffles.

===Second Embodiment===

Fig. 15 is a plan view of the sanitary napkin 2 of the second embodiment in an unfolded and extended state, corresponding to Fig. 2 of the first embodiment. Fig. 16 is a schematic cross-sectional view of the sanitary napkin 2 in an unfolded and extended state, corresponding to Fig. 3 of the first embodiment. In the sanitary napkin 2 of the second embodiment, the partial structure of the composite sheet 20 is different from the sanitary napkin 1 of the first embodiment, and the structure other than the composite sheet 20 is substantially the same as that of the sanitary napkin 1 . The parts different from the sanitary napkin 1 will be described below.

In the composite sheet 20 of the sanitary napkin 2, the skin side in the thickness direction of the non-skin side sheet 21 is provided with skin side sheets 27, 28, and the non-skin side sheet 21 and the skin side sheet 27, 28 in the thickness direction are A plurality of waist elastic members 26, 26... such as elastic threads are arranged between.

The waist elastic member 26 is joined between the non-skin side panel 21 and the skin side panels 27 and 28 in a state stretched in the left-right direction, and is provided in plural at predetermined intervals in the up-down direction. The stretchability exhibited by the waist elastic members 26 imparts stretchability in the left-right direction to the composite sheet 20 . That is, in the composite sheet 20 of the sanitary napkin 2, the "waist elastic region GER" is formed by the waist elastic member 26. As shown in FIG. In addition, in the sanitary napkin 2, the elongation ratio when the waist elastic member 26 is attached to the composite sheet 20 is adjusted so that the elastic force per unit area of the waist elastic region GER in the sanitary napkin 2 and the waist elasticity in the sanitary napkin 1 are adjusted. The expansion and contraction forces per unit area of the regions GER are preferably equal.

The skin side sheet 27 is a member corresponding to the skin side sheet 22 of the sanitary napkin 1, but unlike the skin side sheet 22, it is formed of a non-woven fabric that does not have stretchability (or is extremely small). Likewise, the skin side sheet 28 is a member corresponding to the skin side sheet 23 of the sanitary napkin 1, and is formed of a non-stretchable (or extremely small) nonwoven fabric. Specifically, it is a nonwoven fabric composed of components such as PP (polypropylene), PE (polyethylene), and PET (polyethylene terephthalate), and does not have a stretchable component such as polyurethane.

In the composite sheet 20 of the sanitary napkin 2 , the non-skin side sheet 21 and the skin side sheets 27 and 28 are joined to each other by an adhesive applied to the surface of the waist elastic member 26 . That is, in the sanitary napkin 2, the composite sheet joining portion is formed at the position where the waist elastic member 26 is arranged. In addition, in the same manner as in the first embodiment, in the stretched composite sheet 20, the minimum value of the distance (L32) in the vertical direction of the sheet non-joint portion 32 (hem) is greater than that of the opening edge 1be and the composite sheet. The minimum value of the distance (g60) between the sheet joints (waistline elastic members 26) is large (L32>g60). Therefore, compared with the opposite case (L32<g60), in the composite sheet 20, the dry edge (g60) formed at the opening edge 1be of the leg opening 1b is relatively small, so that the dry edge can be suppressed when walking. The friction with the wearer's skin (legs) can make the wearer less likely to feel uncomfortable. In addition, since the dry edge (L32) formed on the outer sheet 30 is relatively large, it is easy to form a large hem, and the sanitary napkin 2 having a good appearance can be realized.

In addition, also in the sanitary napkin 2 of the second embodiment, the dry edge formed at a site other than the opening edge 1be of the leg opening 1b is the same as that of the sanitary napkin 1 of the first embodiment.

===Others===

The above-mentioned embodiments are for making the present invention easy to understand, and are not for limiting the present invention. It is obvious that the present invention can be changed and improved without departing from the gist thereof, and the equivalents thereof are included in the present invention.

In the above-mentioned embodiment, the underwear-type sanitary napkin 1 was described as an example of the underwear-type (shorts-type) absorbent article, but the present invention can also be applied to other underwear-type absorbent articles other than sanitary napkins. For example, an underpants type (pants type) diaper, an underpants type (pants type) absorbent pad, etc. may be used.

In the above-mentioned embodiment, the following example has been described: using the front folded portion 30 formed by folding the non-skin side panel 21 to the non-skin side at the upper end of the front waist portion 20f, the independent sheet member 34 , the outer side sheet 30 is provided on the non-skin side of the front waist portion 20f. In addition, frills are formed on the front waistline portion 20 f by the sheet non-joint portion 32 of the outer sheet 30 . On the other hand, in the back waist portion 20b, an independent sheet member (non-woven fabric, etc.) may be laminated on the non-skin side of the non-skin side sheet 21 and partially bonded to form a front and rear waist portion 20b. The outer sheet 30 (not shown) is the same as the side waist body part 20f. In addition, the outer sheet 30 in the rear waist portion 20b also has the same structure as the outer sheet 30 in the front waist portion 20f described above, thereby being able to form a shape on the rear side (back side) of the sanitary napkin 1. Even and graceful ruffles.

In the above-mentioned embodiment, the upper waist elastic member 25 is provided between the non-skin side sheet 21 and the outer sheet 30 (the front folded portion 30) at the front waist portion 20f (abdominal side) (see FIG. 10 and the like). , but also can be located between the non-skin side sheet 21 and the skin side sheet 22. In addition, the waist upper end elastic member 25 is provided between the skin side panels 23 and 23 folded back at the upper end 20eb on the back side waist section 20b (back side) (see FIG. 10, etc.), but it may also be provided on the non-skin side panel. Between 21 and the skin side panel 23.

Claims (17)

1. An underpants type absorbent article having a vertical direction, a horizontal direction, and a front-rear direction intersecting each other, comprising: an absorbent body having a liquid-absorbent core; and a composite sheet having a skin side sheet and a non-skin side sheet, and constituting at least a part of the waist opening edge and at least a part of the pair of leg opening edges, characterized in that,

the pants-type absorbent article has a composite sheet joining portion for joining the skin-side sheet and the non-skin-side sheet,

the composite sheet has an outer sheet laminated on the non-skin side surface of the non-skin side sheet,

the outer sheet has:

a sheet joining portion joined to the non-skin-side sheet; and

A sheet non-engaging portion adjacent to the sheet engaging portion in the up-down direction, having a predetermined width in the left-right direction, and not engaging with the non-skin-side sheet,

in the stretched state, in the composite sheet, a minimum value of a distance of the sheet non-joined portion in the up-down direction is larger than a minimum value of a distance between the leg-surrounding opening edge and the composite sheet joined portion.

2. The pant-type absorbent article according to claim 1, wherein the absorbent member comprises,

in the composite sheet in the extended state, a minimum value of a distance of the sheet non-joined portion in the up-down direction is larger than a maximum value of a distance between the leg-surrounding opening edge and the composite sheet joined portion.

3. The pant-type absorbent article according to claim 1 or 2, wherein the absorbent article comprises,

the composite sheet has: a lamination portion in which the skin-side sheet and the non-skin-side sheet are laminated; and a non-laminated portion in which the skin-side sheet and the non-skin-side sheet are not laminated,

in the composite sheet in the stretched state, a minimum value of a distance in the up-down direction of the sheet non-joined portion is larger than a minimum value of a distance between a boundary between the laminated portion and the non-laminated portion and the composite sheet joined portion.

4. The pant-type absorbent article according to any of claims 1 to 3,

the absorbent body has side panels which are folded from the outside to the inside at both side portions in the left-right direction,

the absorbent body has an end joining portion joining an inner end portion of the side sheet in the left-right direction and a sheet member facing the inner end portion on the non-skin side in the thickness direction,

in the absorbent main body in the extended state, a minimum value of a distance in the up-down direction of the sheet non-joined portion is larger than a minimum value of a distance between an inner end in the left-right direction of the end joined portion and an inner end in the left-right direction of the inner end portion.

5. The pant-type absorbent article according to any of claims 1 to 4,

the pants-type absorbent article has a main body joining portion for joining the absorbent main body and the composite sheet,

in an elongated state, a minimum value of a distance of the sheet non-joined portion in the up-down direction is larger than a minimum value of a distance between an outer end of the main body joined portion in the left-right direction and an outer end of the absorbent main body in the left-right direction.

6. The pant-type absorbent article according to any of claims 1 to 5,

the minimum value of the distance between the sheet non-joined portions in the up-down direction is larger than the maximum value of the height of the wrinkles formed on the non-skin side surface of the composite sheet in the natural state in the thickness direction.

7. The pant-type absorbent article according to any of claims 1 to 6,

the composite sheet has a front waistline portion and a rear waistline portion,

the composite sheet has a pair of side joining portions joining the front side waistline portion and the rear side waistline portion to each other at both end portions in the left-right direction,

in the composite sheet in the extended state, a minimum value of a distance in the up-down direction of the sheet non-joined portion is larger than a minimum value of a distance between an outer side end in the left-right direction of the composite sheet and an outer side end of the side joined portion.

8. The pant-type absorbent article according to any of claims 1 to 7,

the distance between the sheet non-joined portions in the extended state in the up-down direction is 5mm or more and 25mm or less.

9. The pant-type absorbent article according to any of claims 1 to 8,

At least either one of the skin-side sheet and the non-skin-side sheet is folded back from the skin side to the non-skin side at the upper end of one side of the composite sheet, thereby forming the outer sheet.

10. The pant-type absorbent article of claim 9 wherein the absorbent article comprises,

the one side is a front side in the front-rear direction.

11. The pant-type absorbent article of claim 10 wherein the absorbent article comprises,

the pants-type absorbent article has a back-side folded portion formed by folding back at least either one of the skin-side sheet and the non-skin-side sheet from the non-skin side to the skin side at an upper end of the back side in the front-back direction of the composite sheet,

at least part of the rear folded portion overlaps the absorbent main body in the up-down direction.

12. The pant-type absorbent article of claim 11 wherein the absorbent article comprises,

the back folded portion has a back sheet non-joined portion whose back side in the front-back direction is not joined to at least either one of the composite sheet and the absorbent main body,

in the extended state, the length of the sheet non-joined portion in the up-down direction is longer than the length of the rear side sheet non-joined portion in the up-down direction.

13. The pant-type absorbent article according to any of claims 1 to 12,

the outer sheet is provided with a plurality of compressed portions at a predetermined pitch, the plurality of compressed portions being formed by compressing the outer sheet in the thickness direction,

in an elongated state, the length of the sheet non-engaging portion in the up-down direction is longer than the pitch of the compressed portion.

14. The pant-type absorbent article according to any of claims 1 to 13,

the composite sheet has a front waistline portion and a rear waistline portion,

the composite sheet has a pair of side joining portions joining the front side waistline portion and the rear side waistline portion at both end portions in the left-right direction,

in the left-right direction, the sheet non-joined portion is continuous between the pair of side joined portions.

15. The pant-type absorbent article according to any of claims 1 to 13,

the composite sheet has a front waistline portion and a rear waistline portion,

the composite sheet has a pair of side joining portions joining the front side waistline portion and the rear side waistline portion at both end portions in the left-right direction,

In the left-right direction, a plurality of temporary fixing joining portions that join the composite sheet and the sheet non-joining portion are provided at predetermined intervals between the pair of side joining portions.

16. An absorbent article package comprising a package material for wrapping the pant-type absorbent article according to any of claims 1 to 15 in a folded state,

packaging is performed in a state where at least part of the non-skin-side surface of the sheet non-joined portion is in contact with the packaging material.

17. The absorbent article package of claim 16, wherein the absorbent article package,

packaging is performed in a state where at least part of the skin-side surface of the sheet non-joined portion is in contact with the packaging material.

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