RU2674845C2 - Absorbent article - Google Patents

Abstract

FIELD: hygiene.SUBSTANCE: absorbent article (1) of the present invention comprises ventral portion (A) disposed on a ventral side of a wearer, dorsal portion (B) disposed on a dorsal side of the wearer, and crotch portion (C) positioned therebetween, wherein at least one of ventral portion (A) and dorsal portion (B) has stretching portions (G1, G2) that stretch and contract in transverse direction (Y). Each of stretching portions (G1, G2) has outer layer sheet (22) disposed distal to the wearer's skin and inner layer sheet (23) disposed proximal to the wearer's skin than the outer layer sheet. Outer layer sheet (22) and inner layer sheet (23) are joined at joining parts (26) disposed sparsely, so that a plurality of joining part rows (26S, 26P) extending along a longitudinal direction X of the article are formed in the transverse direction of the article. Outer layer sheet (22) and/or inner layer sheet (23) between adjacent joining part rows (26S, 26P), by adjoining each other, deform so as to expand in a thickness direction of the stretching portion to form hollow portion (30) between outer sheet (22) and inner sheet (23). Part with opening (m) is formed on joining part (26) so that all or a portion of the part with opening (m) overlaps joining part (26).EFFECT: present invention provides an absorbent article having a ventral side portion disposed on the ventral side of the wearer, a back side that is disposed on the back side of the wearer, a crotch portion located therebetween, ventral at least one of the parts and back sides and a stretchable part that expands and contracts in the article transverse direction.34 cl, 16 dwg

Description

FIELD OF THE INVENTION

[0001]

The present invention provides an absorbent article.

State of the art

[0002]

A stretchable disposable diaper is traditionally known, which comprises an outer cover and an absorbent assembly attached to the outer cover, and in which, in order to improve the fit of the diaper to the user's body, assemblies are formed in the peripheral edge part of the opening for the waist of the front and rear, as well as parts below this peripheral edge part by arranging the elastic elements in the transverse direction of the diaper.

In addition, it is also proposed the formation of a flexible elastic part by arranging such elastic elements by forming an assembly in such a way that the elastic elements are not attached to any of the two sheets between which the elastic elements are located.

[0003]

For example, the applicant of the present invention has proposed an absorbent article, such as a disposable diaper, in which two sheets constituting the outer cover are joined together in connecting parts that are formed in the longitudinal direction and transverse direction of the diaper in a diffuse configuration, and elastic elements to form an assembly arranged between two sheets in such a way that they do not pass through the connecting parts (see patent document 1).

List of references

Patent documents

[0004]

Patent Document 1: Japanese Patent JP 2011-78477A

Patent Document 2: Japanese Patent JP H3-251245A

SUMMARY OF THE INVENTION

[0005]

The present invention provides an absorbent article including a front portion located on the front side of the user, a rear portion that is located on the rear side of the user, and a crotch portion located between the front portion and the rear portion. At least one part of the front part and the rear part has an elastic part, which is able to stretch and contract / contract in the transverse direction of the product. The elasticized part has an outer sheet located on the side that is further from the skin of the user, and an inner sheet located on the side that is closer to the skin of the user than the outer sheet. The outer sheet and the inner sheet are joined to each other in the connecting parts, which are arranged in a distributed configuration, so that a plurality of rows of connecting parts individually extending in the longitudinal direction of the product are formed in the transverse direction of the product. At least one sheet of the outer sheet and the inner sheet, which are located between the rows of connecting parts adjacent to each other, has the ability to deform, so as to protrude in the thickness direction of the elasticized part and form a hollow part between the outer sheet and the inner sheet. A part with an opening in the connecting parts is formed such that the part with the hole completely or partially overlaps the connecting part.

Brief Description of the Drawings

[0006]

[FIG. 1] FIG. 1 is a perspective view illustrating a state in which a stretchable disposable diaper according to an embodiment of the present invention is used (worn).

[FIG. 2] FIG. 2 is a non-planar top view of the diaper illustrated in FIG. 1, in its non-planar uncompressed state when observed from the side of the surface facing the skin.

[FIG. 3] FIG. 3 is an enlarged top view in which rows of connecting parts of the diaper illustrated in FIG. 1, and the connecting parts making up these rows of connecting parts are illustrated on an enlarged scale.

[FIG. 4] FIG. 4 is an enlarged cross-sectional view illustrating a cross-sectional view of the article located in the transverse direction of the lower elastic portion of the lower elastic part of the diaper illustrated in FIG. one.

[FIG. 5] FIG. 5 is an enlarged cross-sectional view illustrating a transverse cross-sectional view of the elastic portion of the diaper located at the waist, illustrated in FIG. one.

[FIG. 6] FIG. 6 (a) -6 (h) are partial enlarged top views illustrating a connecting part and an opening part formed in this connecting part, according to other embodiments of the present invention.

[FIG. 7] FIG. 7 is a cross-sectional view illustrating a main part according to yet another embodiment of the present invention.

[FIG. 8] FIG. 8 (a) and 8 (b) are partial enlarged top views of the front or back, respectively, illustrating methods for forming the connecting parts and connecting parts according to other embodiments of the present invention.

Description of Embodiments

[0007]

For the absorbent article proposed in Patent Document 1, the flexibility and sensation of touching the outer coating can be improved by arranging the elastic elements to form assemblies, so that each of the elastic elements is not fully or partially attached to two sheets between which the elastic elements are located . In addition, according to the technology described in Patent Document 1, the reduction of the elastic elements ensures that the two sheets between which the elastic elements are located form folds having excellent flexibility, and thus, the sensation of touching the outer coating is improved. In addition, the recesses between the folds function as ventilation ducts, and thus the air permeability also becomes favorable. In addition, Patent Document 1 also describes the formation of openings in the folded portions that must be formed by reducing elastic elements, and the breathability and the ability to prevent the retention of heat and moisture can be improved even more.

[0008]

However, it has been found that in the case where relatively small folds are formed by decreasing the step with which the connecting parts are arranged in the transverse direction of the product, in order to improve the smoothness that is felt when the hand is held on the surface of the outer coating, even though the surface is smooth, the outer coating is usually stiff due to the presence of relatively closely spaced connecting parts. In addition, the characteristics required of a product, such as a disposable diaper, are becoming more complicated every year, and there is a demand for an absorbent product in which, in addition to the sensation of being touched, the flexibility is also improved even more. It should be noted that Patent Document 2 describes a configuration in which openings are made near the waist opening, as well as in the side of the stretchable diaper; however, a place is not proposed in which parts with an opening should be formed with respect to the connecting parts and the folds of the outer cover in which the hollow folds are formed.

[0009]

The present invention provides an absorbent article that reduces the likelihood of retaining heat and moisture and provides excellent touch feel and flexibility.

Next, an absorbent article according to the present invention will be described based on its preferred embodiments with reference to the drawings.

A disposable diaper 1, which represents an embodiment of the present invention, will be described with reference to FIG. 1-3. As illustrated in FIG. 1, the disposable diaper 1 according to the present embodiment is a pull-on disposable diaper and includes an outer cover 2 and an absorbent assembly 3 attached to the outer cover 2. In addition, the diaper 1 constitutes the front part A, which is located on the front side of the user and the rear part B , which is located on the back of the user when the user wears the diaper 1. Both end parts of the front part A with respect to the transverse direction of the product Y, respectively, are connected are formed at both ends of the back of B with respect to the transverse direction of the product Y, forming a pair of side seals 4. In addition, these joints form a hole for the waist 5 and a pair of holes for the legs 6. Between the front of A and the back of B of the diaper 1 there is a crotch portion C, which is located on the crotch of the user.

[0010]

The outer cover 2 of the diaper 1 according to the present embodiment is comprised of a front panel 2A from which the front part A is formed and a rear panel 2B from which the rear part B is formed. The front panel 2A and the rear panel 2B are connected to each other in a pair of side seals 4. As illustrated in FIG. 2, the absorbent assembly 3 is fixed so that the central part of the front panel 2A with respect to the transverse direction of the product Y and the central part of the rear panel 2B with respect to the transverse direction of the product Y are connected through it. The parts of the absorbent assembly 3 with which the front panel 2A overlap and the rear panel 2B, respectively, are fully or partially connected to the two panels 2A and 2B using known connecting means, such as a binder.

The outer coating 2 may have a narrow region, for example, an area in which the width is not more than 10 mm, in which the front panel 2A and the rear panel 2B are not connected to each other, at both ends of the front or rear panel with respect to the transverse direction of the product Y. This case is also included under the condition that the front part A and the rear part B are joined to each other in both of their end parts with respect to the transverse direction of the article Y.

[0011]

As illustrated in FIG. 2, the diaper 1 that is formed according to the present embodiment is symmetrical with respect to the longitudinal direction of the article, and there is a center line CL that runs in the longitudinal direction of the article X. Accordingly, for the symmetrical parts, the following description is mainly a description of the right side in FIG. 2; however, the left side has the same configuration as the right side, except that the left side is a mirror image of the right side.

It should be noted that the longitudinal direction of the product X is the direction from the part that is located on the front side of the user, to the part that is located on the back side of the user, through the part that is located on the crotch, and, as a rule, but is the same as longitudinal direction of the absorbent assembly 3. On the other hand, as illustrated in FIG. 2, the transverse direction of article Y is a direction that is perpendicular to the longitudinal direction of article X in a state in which an absorbent article, such as a diaper, is non-flat and uncompressed, and as illustrated in FIG. 1, the transverse direction of the article Y is the same as the circumferential direction located below the waist of the tubular part D, which is formed when the front part A and the rear part B are attached to each other. In addition, in the front part A and the rear part B, the longitudinal direction of the article X corresponds to the top-down direction when the absorbent article is worn, and thus, in each of the front part A and the back part B, the side of the waist opening 5 is also referred to as the upper side or upward side, and the side of the crotch portion C is also referred to as the lower side or downward side.

[0012]

In the diaper 1 according to the present embodiment, as illustrated in FIG. 2, each panel, including the front panel 2A and the rear panel 2B that make up the outer cover 2, includes an outer sheet 22 that makes up the outer surface of the diaper, an inner sheet 23 located on the inner side of the surface of the outer sheet 22, and a plurality of elastic fibers elements 24, which are located between two sheets 22 and 23 in a stretched state. In each panel, which is the front panel 2A and the rear panel 2B, there is an elasticated portion G1 located at the waist and a lower elasticated portion G2 located below the waist. In the diaper 1 according to the present embodiment, the outer sheet 22, which constitutes the outer surface of the diaper, is an outer sheet located on a side further from the user's skin, and the inner sheet 23 is an inner sheet located on the side of the outer cover 2, which is closer to the skin of the user than the outer sheet. According to the present invention, this inner sheet 23 is an “inner sheet located on a side that is closer to the skin of the user than the outer sheet”.

[0013]

The elasticized parts G1 located at the waist are formed on the outwardly directed sides, with respect to the longitudinal direction X of the diaper 1, of the corresponding longitudinal ends 3a and 3b of the absorbent assembly 3. The elasticated parts G1 located at the waist are formed at the peripheral edge of the waist opening 5 and are located at the waist parts of the user when the diaper is worn. In each of the front panel 2A and the rear panel 2B, the lower elastic parts G2 below the waist are formed below the elastic parts G1 located at the waist and above the lower ends of the side seals 4.

In the elasticized parts of G1 located at the waist and lower elasticized parts of G2 below the waist, the outer sheet 22 and the inner sheet 23 are joined to each other in numerous connecting parts 26 that are formed in a diffuse configuration.

[0014]

More specifically, as illustrated in FIG. 2, in the elasticated portion G1 located at the waist of each of the front panel 2A and the rear panel 2B, the connecting parts 26, in which the outer sheet 22 and the inner sheet 23 are joined by melting to each other, are formed periodically in such a way that they are arranged in a line in the longitudinal the direction of the article X, and the plurality of rows of connecting parts 26S, which make up the plurality of connecting parts 26, are formed at intervals in the transverse direction of the product Y.

In addition, in the lower elastic parts G2 below the waist of each of the front panel 2A and the rear panel 2B, the connecting parts 26, in which the outer sheet 22 and the inner sheet 23 are joined by melting to each other, are formed periodically in such a way that they are arranged in a line in the longitudinal direction of the article X, and the plurality of rows of connecting parts 26P, which make up the many connecting parts 26, are formed at intervals in the transverse direction of the product Y.

In the product, the transverse side regions S, S of each of the front panel 2A and the rear panel 2B, each row of connecting parts 26S of the waist elastic part G1 and the corresponding series of connecting parts 26P of the lower elastic part G2 below the waist together form a single continuous row in the longitudinal direction of the product X. The transverse side regions S of the article are respectively located outside of both transverse side edges 3c of the absorbent assembly 3 with respect to the transverse direction of the article Y.

[0015]

In the waist-mounted elasticized portions G1 of the diaper 1 according to the present embodiment, with respect to all of the rows of the connecting parts 26S, the positions of the connecting parts 26 in the longitudinal direction of the article X are substantially the same. In addition, the plurality of elastic members 24 are arranged so that they individually extend in the transverse direction of the article Y so as to pass through the gaps that form between the connecting parts in each of the plurality of rows of the connecting parts 26S. All of the numerous elastic elements 24 are located between the outer sheet 22 and the inner sheet 23.

Similarly, in the lower elastic parts G2 below the waist, with respect to all of the rows of the connecting parts 26P, the positions of the connecting parts 26 in the longitudinal direction of the article X are also essentially the same. In addition, the plurality of elastic members 24 individually extend in the transverse direction of the article Y so as to pass through the gaps that form between the connecting parts in each of the plurality of rows of connecting parts 26P. All of these numerous elastic elements 24 are also located between the outer sheet 22 and the inner sheet 23.

[0016]

As illustrated in FIG. 2, in the diaper 1 according to the present embodiment, both panels, including the front panel 2A and the rear panel 2B, have a pair of outer transverse lateral fixing regions 27 in which the outer sheet 22 and the inner sheet 23 are joined to each other through a binder, moreover, a pair of external transverse lateral locking regions 27, respectively, are located on opposite sides of the center line CL, passing in the longitudinal direction of the product. In addition, both panels, including the front panel 2A and the rear panel 2B, have locking regions 28 on the side of the absorbent assembly, in which the outer sheet 22 and the inner sheet 23 are connected to each other via a binder, the locking regions 28 on the side of the absorbent nodes are located near the respective transverse lateral edges 3c of the absorbent node 3. In each of the front panel 2A (front part A) and rear panel 2B (rear part B), a pair of outer transverse side fixing regions 27 are formed in those places They are separated outwardly (in the direction of the side seals) from the respective locking regions 28 on the side of the absorbent assembly with respect to the transverse direction of the product Y. More specifically, a pair of outer transverse lateral locking regions 27 are formed in the area or near the respective end parts of each of the front panel 2A and the rear panel 2B with respect to the transverse direction of the product Y. It is preferable that the outer transverse lateral locking regions 27 completely or partially cross yvayut respective side seal 4.

[0017]

In each of the elasticized portions G1 located at the waist, a plurality of elastic elements 24 individually pass between a pair of external lateral lateral fixing regions 27, and these elastic elements 24 are fixed between sheets 22 and 23 in each of a pair of external lateral lateral fixing regions 27, but are not attached to any of the sheets 22 and 23 between the outer transverse lateral locking regions 27.

On the other hand, in each of the lower elastic parts G2 below the waist, a plurality of elastic elements 24 extend between the outer lateral lateral fixing region 27 and the fixing region 28 on the node side, and these elastic elements 24 are fixed between the sheets 22 and 23 in each of the outer transverse the lateral fixing region 27 and the fixing region 28 on the node side, but are not attached to any of the sheets 22 and 23 between the outer transverse lateral locking region 27 and the fixing region 28 on the node side.

[0018]

As illustrated in FIG. 2, the fixing regions 28 on the side of the absorbent assembly can be formed so that they completely overlap the absorbent assembly 3. However, the fixing regions 28 on the side of the absorbent assembly can also be formed so that they extend from inside to outside with respect to the respective transverse lateral edges 3c of the absorbent assembly 3. In addition to in addition, the fixing regions 28 on the side of the absorbent assembly may also be formed outside the respective transverse lateral edges 3c of the absorbent assembly 3 with respect to the transverse direction diaper. It should be noted that an embodiment according to which the fixing regions 28 on the side of the absorbent assembly completely overlap the absorbent assembly 3 includes an embodiment according to which the position of the outer end portion of each of the fixing regions 28 on the side of the absorbent assembly with respect to the transverse direction of the diaper is the same as the corresponding transverse lateral edge 3c of the absorbent assembly, 3 and an embodiment according to which each of the fixing regions 28 on the side a the absorbent assembly is formed at a predetermined distance from the corresponding transverse lateral edge 3c of the absorbent assembly 3.

[0019]

In addition, in the waist elasticized portions G1, a plurality of rows of connecting parts 26S are formed at substantially regular intervals in the transverse direction of the article X. More specifically, a plurality of rows of connected regions 26 are arranged at substantially regular intervals between the vicinity of one of the outer transverse lateral fixing regions 27 and in the vicinity of the other outer transverse lateral fixing region 27. In the lower elasticated parts G2 below the waist, a plurality of rows are connected of the parts 26P are also formed at substantially regular intervals between the vicinity of one of the outer lateral lateral fixing regions 27 and the vicinity of the other outer lateral lateral fixing region 27. However, no elastic members 24 are located between the fixing regions 28 on the side of the absorbent assembly, or the elastic members 24 located in a state in which the elastic elements 24 are subjected to processing, such as cutting, to prevent the development of elasticity.

[0020]

Next, the connecting parts 26 will be described, which are formed in the elasticized parts G1 located at the waist and in the lower elastic parts G2 located below the waist.

As illustrated in FIG. 3, each part of the connecting parts 26 constituting the rows of the connecting parts 26S that are formed in the waist elastic parts G1 and the connecting parts 26 making the rows of the connecting parts 26P that are formed in the lower elastic parts G2 below the waist has a part " m "with a hole that is formed so that it completely or partially overlaps this connecting part 26.

As illustrated in FIG. 3, in each of the connecting portions 26 of the diaper 1 according to the present embodiment, the left and right connecting regions “a” and “b” are present on opposite sides of the part “m” with a hole with respect to the transverse direction of the article Y, and there are also connecting regions " c "and" d "on the upper and lower sides, respectively, of the part" m "with a hole in relation to the longitudinal direction of the product X. Therefore, in each of the connecting parts 26 of the diaper 1 according to the present embodiment, the entire perimeter h STI "m" with a hole surrounded by a connecting area "a" - "d".

In the connecting regions “a” to “d”, the constituent polymer (such as a component having the property of thermal bonding by fusion of the constituent fibers) of the sheet material, which constitutes the outer sheet 22 and / or the inner sheet 23, melts and hardens by attaching sheets 22 and 23 to each other to friend. The connecting parts 26 of the diaper 1 according to the present embodiment are formed by the step of forming the connecting parts, in which the outer sheet 22 and the inner sheet 23 are placed on top of each other, and the resulting laminated part is hot stamped. The "m" parts with the hole are formed by processing to make holes in the connecting parts, which are formed at the stage of forming the connecting parts, two sheets 22 and 23. Of the total number of connecting parts formed at the stage of forming the connecting parts, the connecting region "a" is "d" are parts that do not constitute the part from which the "m" part is formed with a hole during processing for making holes.

[0021]

At the stage of formation of the connecting parts, for example, a hot stamping device may be used, including an embossing roller and a support roller and having, on the outer peripheral surface of the embossing roller, protrusions in which the tip surfaces have the same shape as the contour of the connecting parts 26. For processing for making holes, for example, a cutting device may be used, including a cutting roller and a support roller and having, on the outer peripheral surface of the cutting roller, cutting blades having a shape that matches the contour of the "m" part with the hole. In order to carry out processing for making holes, simultaneously with the stage of forming the connecting parts, a hot embossing device can be used having, on the outer peripheral surface of the embossing roller, protrusions whose tip surfaces have the same shape as the contour of the connecting parts 26, and which also has a cutting blade or protrusion in which the shape corresponds to the contour of the "m" part with the hole, as in the hot stamping device described above.

In addition, the stage of forming the connecting parts or the process during which the processing for making holes is carried out simultaneously with the stage of forming the connecting parts can be carried out in such a way that while the continuous multilayer material, including the continuous outer sheet 22 and the continuous inner sheet 23, is continuously moving along in the direction corresponding to the transverse direction of the diaper, adjacent rows of connecting parts are alternately processed by two devices for oryachego embossing, which are arranged at a distance from each other on an upstream side and a downstream side, respectively, the transport path.

[0022]

As in the present embodiment, for example, in the case where the perimeter of each part “m” with the hole is completely surrounded by connecting areas in which the outer sheet 22 and the inner sheet 23 are joined to each other, in the case where, as illustrated in FIG. . 6 (a) and 6 (b), the connecting regions "a" and "b" are present simultaneously on the left and right sides of the part "m" with a hole in relation to the transverse direction of the product Y, or in the case where, as illustrated in FIG. 6 (c), the "m" part with the hole is surrounded by the connecting regions "a", "b" and "c" on three sides, the fact that the "m" part with the hole completely or partially overlaps the connecting part 26 or not is determined by considering even the part that is surrounded by the connecting areas on all sides or on the three sides of the part, or the part that is between the connecting areas "a" and "b", located simultaneously on the left and right sides relative to this part, as part of the connecting parts 26.

In addition, also in the case where each of the parts "m" with the hole is formed so as to completely or partially overlap the corresponding one of the connecting parts of the intermediate product, which was formed at the stage of formation of the connecting parts, the fact that each of the parts "m" with the hole completely or partially overlaps the corresponding connecting part 26 or not, is determined by considering even that part, from the total number of the connecting part that was lost due to the formation of hours ty "m" with a hole, as part of this connecting portion 26 of the final diaper (absorbent article). For example, in both of the connecting parts 26, which are respectively illustrated in FIG. 6 (d) and 6 (e), a part 26 ′ of the connecting part, which is formed at the stage of forming the connecting parts, was lost in the process of forming the part “m” with the hole; however, even this lost part 26 ′ is considered as part of the connecting part 26, and it is thus determined that the part “m” with the hole partially overlaps the connecting part 26.

[0023]

In the lower elastic parts G2 below the waist, of the diaper 1 according to the present embodiment, as illustrated in FIG. 4, the reduction of the elastic elements 24 (see FIG. 2), which are stretched between the outer sheet 22 and the inner sheet 23, causes the sheet 22 and the sheet 23, which are located between the rows of the connecting parts 26P, adjacent to each other, to individually deform so as to protrude in the direction of the thickness of the outer coating 2. Thus, folds 29, which consist of sheet 22 or sheet 23, are formed between adjacent rows of connecting parts 26S, and hollow parts 30 that surround I form the pleats 29.

[0024]

In addition, in the waist elasticized portions G1 of the diaper 1 according to the present embodiment, as illustrated in FIG. 5, the contraction of the elastic elements 24 (see FIG. 2), which are located in a stretched state between the outer sheet 22 and the inner sheet 23, causes the sheet 22 and the sheet 23, which are located between the rows of the connecting parts 26S, adjacent to each other, to deform, so as to protrude in the direction of the thickness of the outer coating 2. Thus, folds 29, which consist of sheet 22 or sheet 23 and sheet 22R, are formed between adjacent rows of connecting parts 26S, and hollow parts 30 are formed between two sheets 22 and 23, which surround Xia folds 29.

[0025]

In the diaper 1 according to the present embodiment, the sheet material constituting the outer sheet 22 of each of the front portion A and the rear portion B is folded back onto the skin side of the surface of the inner sheet 23 along the peripheral edge portion 51 of the waist opening 5, and this backward folded portion 22R covers the skin-facing side of the surface of the inner sheet 23 in the waist elasticized portion G1 (see FIG. 5). In addition, the backward-curved portion 22R is attached to the skin-facing surface of the inner sheet 23 and / or to the absorbent assembly 3 by a binder, which is applied to the entire area or part of the surface of the backward-curved portion 22R, but is not attached by melting to the connecting parts 26 .

[0026]

As illustrated in FIG. 4, it is preferable that the "m" portions of the hole according to the present invention penetrate two sheets 22 and 23, which are joined together so that the hollow portions 30 are formed and also pierce through the outer coating 2 (front panel 2A or rear panel 2B ) However, as illustrated in FIG. 5, a configuration may also be adopted in which, although the "m" portions pierce two sheets 22 and 23 that join together so that hollow portions 30 are formed, the through holes formed by penetration are covered by another sheet, and the portions “m” with a hole does not penetrate the outer cover 2 (front panel 2A or rear panel 2B).

It should be noted that it is also possible to form the connecting parts, in which three layers, including the outer sheet 22, the inner sheet 23 and the bent back part 22R, are connected to each other by hot stamping, are formed as connecting parts according to the present invention in located on the waist of the elasticized parts of G1, etc., and the parts with a hole that pierce these three layers are formed in the connecting parts.

[0027]

In the diaper 1 according to the present embodiment, the connecting parts 26, which are formed periodically in the longitudinal direction of the article X, form rows of connecting parts 26S, 26P, and folds 29 that are hollow are formed between the rows of connecting parts 26S, 26P. Thus, the recesses between the folds 29, which are formed on the outer or inner side of the surface of the diaper 1, as well as the hollow parts 30, in the case where the inner sheet 23 is breathable, serve as ventilation ducts, simplifying the outward movement of moisture in the diaper 1, and thus reducing the likelihood of retaining heat and moisture in the diaper 1. The expression “between the rows of connecting parts 26S, 26P”, as used herein, means the position between the rows of connecting parts 26S in the elasticized parts of G1 located at the waist and between the rows of connecting parts 26P in the lower elasticated parts of G2 located below the waist. It turns out that such folds 29 are formed in the elastic parts G1 located at the waist and / or in the lower elastic parts G2 located below the waist, at least in the natural state, and it is preferable that spaces formed between folds 29.

In addition, the folds 29 are flexibly deformed in accordance with the load that is applied in the direction of the thickness of the outer coating 2, and thus, the touch feeling of the outer coating 2 is also favorable. In addition, in the elasticized portions G1 located at the waist and / or in the lower elasticized portions G2 of the diaper 1 located below the waist, the elastic members 24 are located between the connecting portions 26 that are adjacent to each other in the longitudinal direction of the article, and the elastic members 24 are not attached to the sheets 22 and 23 in the connecting parts 26. Thus, the folds 29 that are formed by the sheet 22 or the sheet 23 are deformed even more flexibly in accordance with the load that is applied in the direction of the thickness of the bump coating 2, and thus, the outer coating 2 provides an even more excellent touch feeling, etc.

[0028]

In addition, in the diaper 1 according to the present embodiment, the “m” portions with the hole are formed in the connecting parts 26 constituting the rows of the connecting parts 26S, 26P, so that each “m” part with the hole completely covers the corresponding one of the connecting parts 26, and thus, compared with the case in which no part “m” with an opening is present, the hardness of the connecting parts 26 is reduced. Therefore, the flexibility of the elasticized parts G1 located on the waist and / or lower elasticated parts G2 located below the waist is improved, and thus the flexibility of the outer cover 2, and the outer cover 2 is easily bent in the longitudinal direction of the product X and in the transverse direction of the product Y.

Improving the flexibility of the outer coating ensures that a larger, wider surface of the outer coating comes into contact with the skin when the outer coating touches the skin, and thus there is the advantage of creating a softer texture, as well as other advantages.

In the case where the size of the folds 29 is relatively small by decreasing the pitch P of the rows of the connecting parts 26S, 26P, the outer cover 2 tends to become stiff. In addition, in such cases, it becomes even more useful the effect of increasing the flexibility of the outer coating, which is achieved by forming part "m" with a hole that overlap the corresponding connecting parts 26.

The pitch P (see FIG. 3) of the rows of connecting parts 26S, 26P in the transverse direction of the article Y is preferably not less than 5 mm and more preferably not less than 7 mm from the point of view of improving air permeability by forming folds 29 and recesses between the folds 29. C from the point of view of wrinkling having an attractive appearance, the pitch P is preferably not more than 15 mm and more preferably not more than 13 mm. From the point of view of simultaneously achieving both of the above goals, the pitch P is preferably from 5 mm to 15 mm inclusive, and more preferably from 7 mm to 13 mm inclusive.

Step P is measured in a state (uncompressed state) in which the elasticized parts are stretched in the transverse direction of the product.

[0029]

Furthermore, in the diaper 1 according to the present embodiment, including with respect to the rows of the connecting parts 26S or the rows of the connecting parts 26P, the connecting parts 26, which make up a plurality of rows of connecting parts, are arranged in a line in the transverse direction of the article Y, and the distance L2 (see Fig. 3) between the connecting parts that are adjacent to each other in the transverse direction of the product Y, is more than the full width W (see Fig. 3) of the individual connecting parts 26. The increase in the distance L2 between the single parts 26 facilitates the formation of folds 29 having a size that allows the folds 29 to cover the connecting parts 26 in a state of compression, between the connecting parts that are adjacent to each other in the transverse direction of the product Y, and thus, when the outer coating 2 touches skin, the likelihood that the connecting portions 26 and the “m” portions will come into direct contact with the skin with the hole. Accordingly, a more comfortable and softer texture can be provided. From this point of view, the ratio (L2 / W) of the distance L2 between the connecting parts that are adjacent to each other in the transverse direction of the product Y, and the total width W of the individual connecting parts is preferably not less than 2 and more preferably from 2 to 10 inclusive.

In addition, the distance L2 between the connecting parts, which are adjacent to each other in the transverse direction of the product Y, is preferably not less than 4 mm and more preferably not less than 6 mm from the point of view of improving breathability by forming folds 29 and recesses between the folds. From the viewpoint of wrinkling having an attractive appearance, the distance L2 is preferably not more than 14 mm and more preferably not more than 12 mm. From the point of view of simultaneously achieving both of the above goals, the distance L2 is preferably between 4 mm and 14 mm inclusive and more preferably between 6 mm and 12 mm inclusive.

The distance L2 between the connecting parts that are adjacent to each other in the transverse direction of the product is measured in a state (uncompressed state) in which the elasticized parts are stretched in the transverse direction of the product.

[0030]

In addition, in the diaper 1 according to the present embodiment, as illustrated in FIG. 3, the "m" part with the hole in each case is formed so that they are within the width W, in the transverse direction of the product Y, the connecting part 26 in which this part "m" with the hole is formed.

Thus, it is possible to prevent a situation in which parts "m" with the hole extend to the folded parts 29 and become noticeable. If the "m" portions with the hole become invisible when viewed from the outside of the diaper surface, this is advantageous, for example, in that anxiety regarding leakage or low tensile strength is prevented.

In addition, when viewed from the inside of the diaper surface, each part "m" with the hole is formed so that it is within the width W, in the transverse direction of the product Y, the connecting part 26, in which this part "m" with the hole is formed. This configuration has the advantage that, for example, the cut end parts of the parts with the hole of the sheet are prevented from coming into direct contact with the skin.

[0031]

Here, the expression "each part" m "with the hole is within the width W, in the transverse direction of the product Y, the connecting part 26" means that in the transverse direction of the product Y, the part "m" with the hole does not extend from any end of the connecting part 26 in relation to this direction. In the connecting parts 26, which are respectively illustrated in FIG. 6 (a), 6 (b), 6 (c), 6 (f), 6 (g) and 6 (h), the "m" portions with the hole are also within the width of the respective connecting portions 26.

As illustrated in FIG. 6 (d) and 6 (e), even in the case where the part "m" with the hole is not within the width W of the connecting part 26 in the transverse direction of the product Y, the length of the part "m" with the hole in the transverse direction of the product Y is preferably not more than 40% and more preferably not more than 30% with respect to step P of the rows of connecting parts 26S, 26P.

[0032]

In addition, as illustrated in FIG. 3, the connecting parts 26 according to the present embodiment, in each case, have connecting regions “a” and “b” on opposite sides of the part “m” with a hole with respect to the transverse direction of the article Y.

In the diaper 1 according to the present embodiment, the folds 29 formed by the outer sheet 22 and the folds 29 formed by the inner sheet 23 in each case continuously extend in the longitudinal direction of the article X so that they intersect the plurality of elastic elements 24 and have an attractive appearance . Since each part “m” with the hole has connecting regions “a” and “b” on opposite sides of the part “m” with the hole, the deformation of the part “m” with the hole when it is stretched in the transverse direction is suppressed, and thus more suitability for wrinkling having an attractive appearance.

[0033]

From the point of view of the formation of the parts "m" with the hole within the width W of the individual connecting parts 26, and from the point of view of the formation of the connecting areas "a" and "b" on the opposite sides of each part "m" with the hole, the width W1 (length in the transverse direction of the product) of the individual parts "m" with the hole is preferably not more than 95% and more preferably not more than 90% with respect to the total width W (length in the transverse direction of the product) of the individual connecting parts 26, and also constitutes not less than 20% and more preferably not less than 30% with respect to the width W.

In addition, in the case where the connecting regions "a" and "b" are present simultaneously on the left and right sides of each part "m" with a hole, the lengths La and Lb of the connecting regions "a" and "b" in the transverse direction of the product Y in each case, it is preferably not less than 2.5% and more preferably not less than 5% with respect to the total width W (length in the transverse direction of the article) of the individual connecting parts 26, and also in each case they are preferably not more than 47, 5% and more preferably not more than 45% with respect to w Rina W.

[0034]

The connecting portion 26 having the connecting regions "a" and "b" on opposite sides of the hole part "m" may be the connecting part 26, in which around the perimeter the part "m" with the hole is surrounded by the connecting regions "a" - " d ", as illustrated in FIG. 3, and it can also be a connecting part 26, in which there is no connecting region above and / or below the part “m” with an opening, as in the case of the connecting parts 26 illustrated in FIG. 6 (a) and 6 (b).

A connecting part 26 in which, around the entire perimeter, the part m with the hole is surrounded by connecting regions as illustrated in FIG. 3 is excellent in terms of tensile strength and low probability of deformation of the “m” part with the hole, as well as in terms of suitability for forming wrinkles extending in the longitudinal direction of the article.

On the other hand, the connecting part 26, in which the connecting regions "a" and "b" are formed only on the left and right sides, respectively, of the part "m" with a hole, as in the case of the connecting parts 26, illustrated in FIG. 6 (a) and 6 (b), is excellent in terms of softness in the transverse bending process, as well as in terms of being able to form wrinkles extending in the longitudinal direction of the article.

In addition, a portion “m” with an opening of the connecting portion 26, which is illustrated in FIG. 6 (a) extends from the upper and lower ends of the connecting portion 26; however, with regard to the stability of the shape of the parts with the hole, when the elasticized parts are stretched in the transverse direction, a configuration is preferred in which, as in the connecting part 26 illustrated in FIG. 6 (b), the "m" part with the hole extends neither from the upper nor from the lower ends of the connecting part 26, because this configuration prevents slight deformation of the part with the hole.

[0035]

Furthermore, with regard to the suitability for forming pleated pleats extending in the longitudinal direction of the article X, it is preferable that each of the connecting parts 26 has a shape that is elongated in the longitudinal direction of the article X. More specifically, the ratio (L1 / W ) the length L1 of the individual connecting parts 26 in the longitudinal direction of the product X and the total width W (length in the transverse direction of the product Y) of the individual connecting parts 26 is preferably not less than 1.5, and more preferably not less than 2, and is also preferably not more than 12 and more preferably not more than 10.

Furthermore, with respect to the "m" portions with the hole, the length in the longitudinal direction of the product X and the length in the transverse direction of the product Y can be substantially equal to each other, as in the connecting parts 26, which are illustrated in FIG. 6 (f) and 6 (g), or the transverse length of the article Y may be more than the length in the longitudinal direction of the article X. However, in the case of portions “m” with a hole, as illustrated in FIG. 3, etc., it also turns out to be preferable that the length Lm in the longitudinal direction of the article X is more than the length W1 in the transverse direction of the article Y, and, as in the case of the connecting parts 26, it is preferable that the parts “m” have an opening in each case have a shape that is elongated in the longitudinal direction of the product X. More specifically, the ratio (Lm / W1) of the length Lm of the individual parts "m" with a hole in the longitudinal direction of the product X and the length W1 of the individual parts "m" with a hole in the transverse direction products Y comp Preferably, it is more than 1.0, more preferably not less than 1.5, and even more preferably not less than 2, and it is also preferably not more than 12 and more preferably not more than 10.

[0036]

The length Lm of the individual parts "m" with a hole in the longitudinal direction of the article X is preferably not less than 50% and more preferably not less than 70%, and it is also preferably not more than 100% and more preferably not more than 95% with respect to the length L1 individual connecting parts 26 in the longitudinal direction of the product X, or is preferably from 50% to 100% inclusive and more preferably from 70% to 95% inclusive with respect to the length L1.

In addition, in the case where the connecting regions "c" and "d" are present on the upper and lower sides, respectively, of each part "m" with a hole, the lengths Lc and Ld of the connecting regions "c" and "d" in the longitudinal direction articles X in each case are preferably not less than 1% and more preferably not less than 5%, and also preferably not more than 25% and more preferably not more than 20% with respect to the length L1 of the individual connecting parts 26 in the longitudinal direction of the article X .

[0037]

In addition, in the case where the connecting regions "a" and "b" are present simultaneously on the left and right sides, respectively, of each part "m" with an opening with respect to the transverse direction of the article X, and the connecting regions "c" and " d "are present on the upper and lower sides, respectively, of each part" m "with an aperture, with respect to the suitability for forming pleated pleats extending in the longitudinal direction of the article X, and from the point of view of improving the flexibility of the pleats, it is preferable that the fullthe length (Lc + Ld) of the connecting regions "c" and "d" in the longitudinal direction of the article X, and the connecting regions "c" and "d" are located on the upper and lower sides, respectively, of each part "m" with the hole, is such or is less than the total length (La + Lb) of the connecting regions "a" and "b" in the transverse direction of the product Y, and the connecting regions "a" and "b" are located simultaneously on the left and right sides, respectively, of each part " m "with a hole. Due to this configuration, the hardness of the connecting parts 26 is reduced, so that the outer coating 2 is easily bent in the transverse direction of the product Y and has improved flexibility, and folds 29 are easily formed, which extend in the longitudinal direction of the product X. The expression "equal", which is used in this document, applies, for example, to the case in which the total length (Lc + Ld) is from 80% to 120% inclusive with respect to the full length (La + Lb). The total length (Lc + Ld) is preferably not more than 120%, more preferably not more than 110%, and even more preferably not more than 100% with respect to the total length (La + Lb). In addition, the total length (Lc + Ld) is preferably not less than 5%, more preferably not less than 10%, and even more preferably not less than 20% with respect to the total length (La + Lb). In the connecting portions 26, which are illustrated in FIG. 6 (g) and 6 (h), the total length (Lc + Ld) of the connecting regions "c" and "d" in the longitudinal direction of the article X, and the connecting regions "c" and "d" are located on the upper and lower sides, respectively , the part "m" with the hole, is less than the total length (La + Lb) of the connecting regions "a" and "b" in the transverse direction of the product Y, and the connecting regions "a" and "b" are located simultaneously on the left and right sides , respectively, part "m" with a hole.

[0038]

FIG. 7 illustrates an important part according to another embodiment of the present invention. According to an embodiment, which is illustrated in FIG. 7, in any of the elasticized parts G1 located on the waist and lower elasticized parts G2 located below the waist, the outer sheet 22 located on the side further from the user's skin constitutes an elastic sheet and the inner sheet 23 located on the side that is located closer to the skin of the user than the outer sheet 22 constitutes an inelastic sheet. According to an embodiment, which is illustrated in FIG. 7, the outer sheet 22 in a stretched state and the inner sheet 23 are placed on top of each other, and the resulting laminated part is hot stamped and the connecting parts 26 are formed, and simultaneously or after this stage of forming the connecting parts, processing for making holes is performed, and parts "m" are formed with a hole. According to an embodiment, which is illustrated in FIG. 7, the contraction of the outer sheet 22 causes the inner sheet 23 to protrude and folds 29, and hollow portions 30 are formed between the sheets 22 and 23 in these portions where the folds 29 are formed.

For an elastic sheet, for example, an elastic nonwoven fabric (hereinafter referred to as the term "elastic composite nonwoven fabric") can be used, in which a layer of inelastic fiber, which is essentially inelastic, is located on at least one surface of the elastic fibrous layer, and two the fibrous layers are joined to each other by thermal fusion bonding in a state in which the constituent fibers of the elastic fibrous layer retain their fibrous morphology.

[0039]

In the case where the above-described elastic composite nonwoven fabric is used as the outer sheet 22 and / or the inner sheet 23, fibers consisting of a thermoplastic elastomer such as a styrene elastomer, polyolefin elastomer can be used as fibers constituting the elastic fibrous layer a polyester elastomer or a polyurethane elastomer, or an elastic polymer such as rubber. In addition, fibers which comprise polyethylene (PE), polypropylene (PP), polyester (polyethylene terephthalate PET or polybutylene terephthalate PBT), polyamide or a similar polymer can be used as fibers constituting the inelastic fiber layer.

[0040]

Known elastic composite nonwoven webs of various types can be used as the elastic composite nonwoven webs described above. For example, an elastic sheet described in Japanese Patent JP 2008-179128A, an elastic sheet described in Japanese Patent JP 2007-22066A, an elastic non-woven fabric that is manufactured using the method of manufacturing the elastic non-woven fabric described in Japanese Patent JP 2007- can also be used. 22066A, multilayer sheet described in Japanese patent JP H10-29259A, and similar materials.

In a configuration in which the outer sheet 22 or inner sheet 23 constitutes an elastic sheet and folds 29 are formed by another sheet, the elastic elements become invisible and do not impair the appearance of the diaper, etc., and thus, a silhouette resembling underwear can be obtained .

[0041]

Next, the aforementioned diaper 1 will be described in detail. The aforementioned side seals 4 are formed after the connection parts 26 are formed by placing each of the outer transverse lateral locking regions 27 on the side of the front portion A and the corresponding one of the outer transverse lateral locking regions 27 on the side of the rear portion B on each other. and the direction of the resulting overlapping parts to hot stamping. Ultrasonic welding, laser radiation, etc. can also be used for processing to form the connecting parts 26, instead of hot stamping. Ultrasonic welding, laser radiation, a binder, etc. can also be used for processing to form side seals 4, instead of hot stamping. .

[0042]

The absorbent assembly 3 has a liquid permeable top sheet 31, a liquid impervious bottom sheet 32, and an absorbent member 33 located between the top sheet 31 and the bottom sheet 32. Low liquid permeability includes liquid impermeability and low liquid permeability. In addition, the pairing sheets 34 for forming leakproof cuffs are located on both transverse lateral parts of the absorbent assembly 3. Each sheet 34 for forming a leakproof cuff has an elastic member 35 from which the leakproof cuff is formed near the end edge of this sheet 34 to form a leakproof cuff, which is located near the center line CL in the longitudinal direction of the product. When the diaper is worn, the compressive force of the elastic member 35 causes a portion of the sheet 34 to form a leakproof cuff, which has a predetermined width from the aforementioned end edge, to occupy a vertical position, so as to move from the top sheet 31 and thus form leak-proof cuffs.

[0043]

Next, materials for forming various parts of the diaper 1 will be described. For each element, including the top sheet 31, the bottom sheet 32, the absorbent element 33, the sheets 34 for forming leak-proof cuffs, etc., materials similar to those can be used without limitation which are traditionally used in absorbent products of this type. For example, a liquid-permeable nonwoven fabric, a perforated film, a multilayer material made therefrom, or the like can be used as the top sheet 31, and a polymer film, a multilayer material containing a polymer film and a nonwoven web, or the like can be used as the bottom sheet 32. An absorbent element, for example, obtained by wrapping an absorbent assembly consisting of a fibrous aggregate of fibrous material, such as cellulose, or an absorber an absorbent assembly in which the superabsorbent polymer supports the aforementioned absorbent assembly, in the wrapping sheet which is tissue paper, a permeable non-woven fabric, or the like can be used as an absorbent member 33. An elastic film, a water-repellent non-woven fabric, a woven fabric, a multilayer sheet, containing these materials or similar material can be used as sheets 34 to form leak-proof cuffs.

[0044]

The sheet materials of various types, which are traditionally used in products of this type, can be used, without limitation, as the sheet material, which is the outer sheet 22 and the inner sheet 23. However, non-woven fabric is preferred, and, in particular, taking into account flexibility and other properties, a single-layer non-woven fabric or a laminated non-woven fabric containing two or more layers that make up the aerodynamically woven non-woven fabric, thermocaten non-woven is preferred a web, a hydro-woven nonwoven web, a spunbond nonwoven web made by a meltblown nonwoven web, etc. In addition, a sheet in which a nonwoven web of one of these types and a film are connected can also be used. It should be noted that the outer sheet, which makes up the non-woven fabric, film or similar material, may also be located on the non-skin side of the surface of the bottom sheet 32 in the crotch portion C.

Known elastic materials of various types that are used in absorbent products, such as disposable diapers and sanitary napkins, can be used, without limitation, as a material for forming elastic elements 24 and 35. Exemplary materials for forming elastic materials are synthetic rubber, such as styrene butadiene copolymer, butadiene, isoprene and neoprene, natural rubber, ethylene vinyl acetate (EVA) copolymer, elastic polyolefin and polyurethane. With respect to the formation of elastic elements, fibrous elastic elements (rubber fiber or the like) or threadlike elastic elements (flat rubber thread or the like), for example having a rectangular, square, round or polygonal cross-section or fibrous elastic, can preferably be used elements consisting of many fibers, or similar elements.

[0045]

In the above description, the present invention is described based on preferred embodiments. However, the present invention is not limited to the above embodiments, and may be amended accordingly.

For example, an outer cover that does not separate into the front panel 2A and the rear panel 2B may be adopted as the outer cover. For example, a configuration can be adopted in which the outer sheet 22 and the inner sheet 23 of the outer cover in each case consists of a single sheet that continuously covers the front part A, the crotch part C and the back part B, or a configuration can be adopted in which, although the outer the outer cover sheet 22 constitutes a single sheet that continuously covers the front part A, the crotch part C and the rear part B, and the inner sheet 23 of the outer cover is located only in one of the front part A and the back part B.

Furthermore, the elasticity of the lower elastic parts G2 below the waist can create continuous elasticity from one of the transverse side regions S to the other transverse side region S. In addition, the absorbent article according to the present invention can have only the elasticated parts G1 located on the waist or below the waist lower elastic parts G2. In addition, the absorbent article according to the present invention may have elasticated parts G1 located on the waist and / or lower elastic parts G2 located below the waist in only one part of the front part A or the rear part B instead of the simultaneous presence of the elasticized parts G1 located on the waist and located below the waist of the lower elastic parts of G2 in front of A and back of B.

[0046]

In addition, the absorbent article according to the present invention may have connecting parts 26 in which portions “m” with an opening are present only in one of the front part A or the rear part B. From the point of view of breathability, it is preferable that the connecting parts 26 having parts "m" with a hole are formed at least in the back of B.

In addition, as illustrated in FIG. 8 (a) and 8 (b), a configuration may be adopted in which the connecting parts 26 in which the "m" portions are formed with the hole, and the connecting parts 26N in which no "m" part with the hole are formed, are formed in regularly an ordered configuration in both or one of the front part A and the rear part B. In addition, a configuration can also be adopted in which the connecting parts 26 and the connecting parts 26N can be formed, making a pattern with an irregular arrangement.

In the case where the connecting parts 26K, in which the parts with the hole "m" are formed, and the connecting parts 26N, in which no part "m" with the hole is formed, are simultaneously formed in the front part A or the back part B, the proportion of the connecting parts 26K in which the "m" portions are formed with an aperture, with respect to the total number of connecting portions 26 that are formed in the front part A or the rear part B, is preferably not less than 10% and more preferably not less than 30% from the point of view of improvement texture properties such as soft st, and also is preferably not more than 50% from the viewpoint of preventing occurrence of trouble in regard to flow and t. d.

[0047]

In addition, from the point of view of preventing leakage or from the point of view of preventing anxiety about the occurrence of leakage, for example, it is preferable that the connecting parts 26 having portions "m" with an opening are formed near the side seal 4, but not formed near the absorbent assembly 3 For example, when each of the transverse side regions S of the front panel 2A of the product (part of the outer cover in the front) or each of the transverse side regions S of the rear panel 2A of the product (part of the outer cover in the rear part) is divided into a side that is near the absorbent assembly 3, and a side that is close to the corresponding one of the side seals 4, by halving the length of the transverse side region of the article S in the transverse direction of the article Y, it turns out that a larger number the connecting parts 26, in which the "m" parts are formed with the hole, on the side that is near the side seal 4, and it is more preferable that the connecting parts 26 having ti "m" with an opening formed on the side which is near side seal 4, and no connecting parts 26 having portions "m" with a hole, are formed on the side which is close to the absorbent assembly 3.

[0048]

In addition, each of the connecting parts 26 may have a rectangular shape, as illustrated in FIG. 3, or it may also take other shapes, such as a square shape, an oblong shape, or an elliptical shape, for example, as illustrated in FIG. 6 (f) -6 (h). In addition, instead of a rectangular shape, each of the "m" portions with the hole may also have other shapes, such as a square shape, an oblong shape, or an elliptical shape.

With respect to the "m" portions with the hole, it is preferable that the part that penetrates one of the two sheets that join each other in the connecting parts 26 and the part that penetrates the other of these sheets have the same shape and the same size, and also overlap each other. However, the present invention is not limited to this configuration.

[0049]

Furthermore, although the outer cover 2 in the front part A or the back part B may have a configuration in which only the sheet material constituting the outer sheet is folded back along the peripheral edge of the waist opening, as in the case of the diaper 1, which is described above, can a configuration can also be adopted in which the sheet material constituting the outer sheet and the sheet material constituting the inner sheet are folded back together, or a configuration can also be adopted in which no sheet of the outer sheet and the inside sheet does not have a backward bent part. In addition, the backward-curved portion of the outer sheet or inner sheet may be attached to the opposite surface in a different manner than in the case of the diaper 1 described above. For example, a configuration may also be adopted in which the entire region of the backward bent portion is attached to the opposite surface, or other configurations may exist.

[0050]

In addition, the absorbent article of the present invention is not limited to a stretchable absorbent article and may also be a disposable diaper of the so-called open type. Exemplary stretchable absorbent articles are stretchable sanitary napkins and the like, in addition to stretchable disposable diapers for children or adults. Typically, in an open type disposable diaper, fixing tapes are present on both transverse side portions of the back, each of these fixing tapes having an adhesive part or a connecting part that is a hook-shaped element or similar mechanical fastener such as Velcro and a disposable diaper open type is worn by attaching the fixing tapes to the receiving tape, which is located on the outer surface of the front part.

[0051]

Processing for the manufacture of holes can be carried out before or after the stage of formation of the connecting parts. From the point of view of the accuracy of the formation of parts "m" with the hole at predetermined specific points with respect to the connecting parts 26 and, in particular, from the point of view of the accuracy of the formation of parts "m" with the hole, which are individually within the width W of the connecting parts 26 in the transverse the direction of the product, it is preferable that the processing for making holes is carried out simultaneously with the stage of formation of the connecting parts or after the stage of formation of the connecting parts, and is more preferred Yelnia that processing for making openings is performed simultaneously with the stage of formation of the connecting portions.

[0052]

Those parts of each of the above embodiments that have not been described, as well as the requirements for only one of the embodiments, can individually apply to other embodiments, depending on the situation. In addition, requirements for a variety of embodiments may prove to be interchangeable with each other among the embodiments, depending on the situation.

[0053]

With respect to the above embodiments, the following is a description of the next pull-on disposable diaper, etc.

[0054]

<1> An absorbent article including a front portion located on the front side of the user, a rear portion located on the rear side of the user, and a crotch portion located between the front portion and the rear portion,

where at least one of the front part and the rear part has an elasticized part configured to stretch and compress in the transverse direction of the product,

the elasticized part has an outer sheet located on the side further from the skin of the user, and an inner sheet located on the side closer to the skin of the user than the outer sheet,

the outer sheet and the inner sheet are connected to each other in the connecting parts located in a distributed configuration, so that many rows of connecting parts individually extending in the longitudinal direction of the product are formed in the transverse direction of the product,

at least one of the outer sheet and the inner sheet located between the rows of connecting parts adjacent to each other, is deformed, so as to protrude in the thickness direction of the elasticized part and form a hollow part between the outer sheet and the inner sheet, and

a part with a hole is formed in the connecting part, so that the part with the hole completely or partially overlaps the connecting part.

[0055]

<2> An absorbent article according to paragraph <1>, in which a part with a hole is formed so that it is within the width of the connecting part in the transverse direction of the product.

<3> An absorbent article according to <1> or <2>, wherein the hole portion has a width (W1) that is preferably not more than 95%, more preferably not more than 90%, and it is preferably not less than 20 %, preferably not less than 30% with respect to the total width (W) of the connecting part.

<4> An absorbent article according to any one of paragraphs <1> to <3>, wherein the connecting part has connecting regions on opposite sides of the part with a hole in relation to the transverse direction of the product.

<5> An absorbent article according to paragraph <4>, wherein each of the connecting regions on opposite sides of the hole portion has a length (La, Lb) in the transverse direction of the article, which is preferably not less than 2.5%, more preferably not less than 5%, moreover, it is preferably not more than 47.5%, more preferably not more than 45% with respect to the full width (W) of the connecting part having a part with an opening.

<6> An absorbent article according to <4> or <5>, wherein the connecting part also has connecting regions on an upper side and a lower side of the part with a hole in relation to the longitudinal direction of the product, and around the perimeter, the part with the hole is surrounded by connecting areas.

<7> The absorbent article according to <6>, wherein each of the connecting regions on the upper side and the lower side of the hole part has a length (Lc, Ld) in the longitudinal direction of the product, which is preferably not less than 1%, more preferably not less than more than 5%, moreover, it is preferably not more than 25%, more preferably not more than 20% with respect to the length L1 of the connecting part in the longitudinal direction of the article X.

<8> An absorbent article according to any one of paragraphs <1> to <7>, wherein in the elastic part, a plurality of elastic elements are located between the outer sheet and the inner sheet, and the plurality of elastic elements individually extend in the transverse direction of the product so as to pass between the connecting parts that are adjacent to each other in the longitudinal direction of the product.

<9> An absorbent article according to any one of <1> - <8>,

wherein the absorbent article has an elastic portion located at the waist as an elastic portion, and

in the elasticized portion located at the waist, a plurality of elastic elements are arranged so that they extend between the outer transverse lateral fixing regions constituting the pair, and the elastic elements are fixed between the outer sheet and the inner sheet in each of the pair of outer transverse lateral fixing regions, but are not attached to one of the outer sheet and the inner sheet between the outer transverse lateral fixing regions.

[0056]

<10> An absorbent article according to any one of paragraphs <1> to <9>,

moreover, this absorbent product has a lower elastic part located below the waist as an elastic part, and

in the lower elasticized part below the waist, a plurality of elastic elements are arranged so that they extend between the outer transverse lateral fixing region and the fixing region on the node side, and the elastic elements are fixed between the outer sheet and the inner sheet in each of the outer transverse lateral fixing region and the fixing areas on the side of the assembly but are not attached to any of the outer sheet and the inner sheet between the outer transverse lateral fixing region and the fix a knotted area.

<11> An absorbent article according to any one of <1> to <10>, wherein the rows of connecting parts have a pitch (P) of preferably not less than 3 mm, more preferably not less than 4 mm, more preferably not less than 5 mm more preferably not less than 7 mm, preferably not more than 15 mm, more preferably not more than 13 mm, even more preferably not more than 10 mm, and preferably from 3 mm to 15 mm inclusive, more preferably from 5 mm to 15 mm inclusive, even more preferably from 7 mm to 13 mm inclusive.

<12> An absorbent article according to any one of <1> -11>, wherein the hole portion has a transverse length of the article that is preferably not more than 40%, more preferably not more than 30% with respect to step (P) rows of connecting parts in the transverse direction of the product.

<13> An absorbent article according to any one of <1> to <12>, wherein each of the connecting parts has a shape that is elongated in the longitudinal direction of the article X.

<14> An absorbent article according to any one of <1> to <13>, wherein the ratio (L1 / W) of the length (L1) of the connecting part in the longitudinal direction of the product and the total width (W) of the connecting part is preferably not less than 1, 5, more preferably not less than 2, more preferably not more than 12, more preferably not more than 10.

<15> An absorbent article according to any one of <1> to <14>, wherein the length Lm of the part with the hole in the longitudinal direction of the product X is preferably greater than the length W1 of the part with the hole in the transverse direction of the product Y, and more preferably the part with the hole has a shape that is elongated in the longitudinal direction of the article X, and

the ratio (Lm / W1) of the length Lm of the part with the hole in the longitudinal direction of the product X and the length W1 of the part with the hole in the transverse direction of the product Y is preferably not less than 1.5, more preferably not less than 2, and it is preferably not more than 12 and more preferably not more than 10.

<16> An absorbent article according to any one of <1> to <15>, wherein the length (Lm) of the part with the hole in the longitudinal direction of the article is preferably not less than 50%, more preferably not less than 70%, preferably not more than 100%, preferably not more than 95%, moreover, it is preferably from 50% to 100% inclusive, preferably from 70% to 95% inclusive with respect to the length (L1) of the connecting part in the longitudinal direction of the product.

<17> An absorbent article according to any one of <1> to <16>, wherein the outer sheet or inner sheet constitutes an elastic non-woven fabric.

<18> An absorbent article according to any one of <1> to <17>, wherein the connecting parts, in each of which a part with a hole is formed, and the connecting parts in which a part with a hole is not formed, are formed in a regularly ordered configuration.

<19> An absorbent article according to any one of paragraphs <1> to <18>, wherein the proportion of the connecting parts, in each of which a part with a hole is formed, with respect to all connecting parts that are formed in the front or back having parts, is not less than 10%.

[0057]

<20> An absorbent article according to any one of paragraphs <1> to <19>, in which the proportion of the connecting parts, in each of which a part with a hole is formed, with respect to the total number of connecting parts that are formed in the front or back, is from 10% to 50% inclusive.

<21> An absorbent article according to any one of paragraphs <1> to <20>,

moreover, this absorbent article is a stretchable absorbent article having an outer coating and an absorbent assembly attached to the outer coating,

the elasticized part is formed in the outer coating,

the sheet material constituting the outer sheet of each of the front and back is folded back onto the skin side of the surface of the inner sheet along the peripheral edge portion of the waist opening, and

the backward-curved portion is attached to the skin-facing surface of the inner sheet and / or the absorbent assembly with a binder, which is applied to the entire area or part of the surface of the backward-curved portion, but is not attached by melting to the connecting parts.

<22> An absorbent article according to any one of <1> -21>,

moreover, this absorbent article is a stretchable absorbent article having an outer coating and an absorbent assembly attached to the outer coating,

the elasticized part is formed in the outer coating, and

the part with the hole penetrates two sheets, which are attached to each other so that a hollow part is formed, and penetrates through the outer coating in the thickness direction.

<23> An absorbent article according to any one of paragraphs <1> to <21>,

moreover, this absorbent article is a stretchable absorbent article having an outer coating and an absorbent assembly attached to the outer coating,

the elasticized part is formed in the outer coating, and

the part with the hole penetrates two sheets, which are joined to each other so that a hollow part is formed, and the through hole formed as a result of penetration is covered by another sheet and does not penetrate the outer coating.

<24> An absorbent article according to any one of <1> to <23>, wherein in the elasticized portion located at the waist with respect to all of the rows of connecting parts, the positions of the connecting parts in the longitudinal direction of the product are substantially the same.

[0058]

<25> An absorbent product according to any one of paragraphs <1> to <24>,

in which the connecting parts individually have connecting areas on opposite sides of the part with the hole relative to the transverse direction of the product and on the upper side and lower side of the part with the hole in relation to the longitudinal direction of the product, and

the total length (Lc + Ld) in the longitudinal direction of the product of the connecting areas located on the upper side and the lower side of the hole part is the same or less than the total length (La + Lb) in the transverse direction of the product of the connecting areas located on opposite sides of the part with a hole.

<26> An absorbent article according to <25>, wherein the total length (Lc + Ld) is preferably not more than 120%, more preferably not more than 110%, more preferably 100%, and preferably not less than 5%, more preferably not less than 10%, more preferably not less than 20% with respect to the total length (La + Lb).

<27> An absorbent article according to any one of <1> to <26>, wherein the connecting parts making up the rows of connecting parts are arranged in a line in the transverse direction of the product, and the distance (L2) between the connecting parts that are adjacent to each other in the transverse direction of the article Y is more than the full width (W) of the connecting part.

<28> An absorbent article according to any one of paragraphs <1> to <27>,

in which the connecting parts making up the rows of connecting parts are arranged in a line in the transverse direction of the product, and

the ratio (L2 / W) of the distance (L2) between the connecting parts that are adjacent to each other in the transverse direction of the product Y, and the total width (W) of the connecting part is from 2 to 10 inclusive.

<29> An absorbent article according to any one of paragraphs <1> to <28>,

in which the connecting parts making up the rows of connecting parts are arranged in a line in the transverse direction of the product, and

the distance (L2) between the connecting parts that are adjacent to each other in the transverse direction of the product Y is preferably not less than 4 mm, more preferably not less than 6 mm, preferably not more than 14 mm, more preferably not more than 12 mm, it is preferably from 4 mm to 14 mm inclusive, more preferably from 6 mm to 12 mm inclusive.

[0059]

<30> An absorbent article according to any one of <1> to <29>, the absorbent article being a stretchable absorbent article having an outer coating and an absorbent assembly attached to the outer coating,

the elasticized part is formed in the outer coating,

a portion of the outer coating in the front and a portion of the outer coating in the rear are joined together in a pair of side seals, and

when the transverse side region of the outer cover of the product in the front or the transverse side region of the outer coating of the product in the rear is divided into a side that is near the absorbent assembly and a side that is near one of the side seals by halving the length of the transverse side region of the product in the transverse direction of the product, a greater number of connecting parts, in each of which a part with a hole is formed, are formed on the side that is located in izi side seal.

<31> An absorbent article according to any one of paragraphs <1> to <30>,

moreover, this absorbent product is a stretchable absorbent product, which are the front panel, rear panel and absorbent assembly,

an absorbent assembly connects a center portion of a front panel with respect to a transverse direction of the article and a center portion of a rear panel with respect to a transverse direction of the article,

the front panel and the rear panel are connected to each other in a pair of side seals, and

when the transverse side region of the front panel of the product or the transverse side region of the rear panel of the product is divided into a side that is close to the absorbent assembly and a side that is close to the corresponding one of the side seals by halving the length of the transverse side region of the product in the transverse direction of the product, the number of connecting parts, in each of which a part with an opening is formed, are formed on the side that is near the side seal.

<32> An absorbent article according to paragraph <30> or <31>, in which, the connecting parts, in each of which there is a part with an opening, are formed on the side that is near the side seal, and no connecting part in which the part with hole does not form on the side that is near the absorbent assembly.

Industrial applicability

[0060]

The absorbent article of the present invention reduces the likelihood of retaining heat and moisture and provides excellent touch feel and flexibility.

Claims (57)

1. An absorbent article comprising a front portion located on the front side of the user, a rear portion located on the rear side of the user, and a crotch portion located between the front portion and the rear portion, where at least one of the front part and the rear part has an elasticized part configured to stretch and compress in the transverse direction of the product, the elasticized part has an outer sheet located on the side further from the skin of the user, and an inner sheet located on the side closer to the skin of the user than the outer sheet, the outer sheet and the inner sheet are connected to each other in the connecting parts located in a distributed configuration, so that many rows of connecting parts individually extending in the longitudinal direction of the product are formed in the transverse direction of the product, at least one of the outer sheet and the inner sheet located between the rows of connecting parts adjacent to each other, is deformed so as to protrude in the thickness direction of the elasticized part and form a hollow part between the outer sheet and the inner sheet, and a part with a hole is formed in the connecting part so that the part with the hole completely or partially overlaps the connecting part. 2. The product according to claim 1, in which the part with the hole is formed so that it is within the width of the connecting part in the transverse direction of the product. 3. The product according to claim 1, in which the part with the hole has a width that is from 20 to 95% inclusive with respect to the total width W of the connecting part. 4. The product according to claim 3, in which the part with the hole has a width that is from 30 to 90% inclusive with respect to the total width W of the connecting part. 5. The product according to claim 1, in which the connecting part has a connecting region on opposite sides of the part with the hole relative to the transverse direction of the product. 6. The product according to claim 5, in which each of the connecting areas on opposite sides of the part with the hole has a length in the transverse direction of the product, which is from 2.5 to 47.5% inclusive with respect to the full width of the connecting part having part c hole. 7. The product according to claim 6, in which each of the connecting regions on opposite sides of the part with the hole has a length in the transverse direction of the product, which is from 5 to 45% inclusive with respect to the full width of the connecting part having the part with the hole. 8. The product according to claim 5, in which the connecting part also has connecting areas on the upper side and the lower side of the part with the hole in relation to the longitudinal direction of the product, and around the perimeter of the part with the hole is surrounded by the connecting areas. 9. The product of claim 8, in which each of the connecting areas on the upper side and the lower side of the part with the hole has a length in the longitudinal direction of the product, which is from 1 to 20% inclusive with respect to the length L1 of the connecting part in the longitudinal direction of the product. 10. The product according to claim 1, in which in the elasticized part a plurality of elastic elements are located between the outer sheet and the inner sheet, and the set of elastic elements individually extends in the transverse direction of the product so as to pass between the connecting parts that are adjacent to each other in the longitudinal product direction. 11. The product according to claim 1, in which the absorbent product has located on the waist elasticized part as the elasticized part, and in the elasticized portion located at the waist, a plurality of elastic elements are arranged so that they extend between a pair of outer transverse lateral fixing regions, and elastic elements are fixed between the outer sheet and the inner sheet in each pair of outer transverse lateral fixing regions, but are not attached to any of the outer sheet and the inner sheet between the outer transverse lateral fixing regions. 12. The product according to claim 1, in which the absorbent product has a lower elastic part located below the waist as an elastic part, and in the lower elasticated part below the waist, a plurality of elastic elements are arranged so that they extend between the outer lateral lateral fixing region and the fixing region on the node side, and the elastic elements are fixed between the outer sheet and the inner sheet in each of the outer transverse lateral fixing region and the fixing areas on the side of the assembly but are not attached to any of the outer sheet and the inner sheet between the outer transverse lateral fixing region and the fixative area on the node side. 13. The product according to claim 1, in which the rows of the connecting parts have a pitch (P) of 3 to 15 mm inclusive in the transverse direction of the product. 14. The product according to claim 1, in which the part with the hole has a length in the transverse direction of the product, which is not more than 40% with respect to the step (P) of the rows of connecting parts in the transverse direction of the product. 15. The product according to claim 1, in which each of the connecting parts has a shape that is elongated in the longitudinal direction of the product X. 16. The product according to claim 1, in which the ratio (L1 / W) of the length (L1) of the connecting part in the longitudinal direction of the product and the full width (W) of the connecting part is from 1.5 to 12 inclusive. 17. The product according to claim 1, in which the length (Lm) of the part with the hole in the longitudinal direction of the product is more than the length (W1) of the part with the hole in the transverse direction of the product. 18. The product according to claim 1, in which the length (Lm) of the part with the hole in the longitudinal direction of the product is from 50 to 100% inclusive with respect to the length (L1) of the connecting part in the longitudinal direction of the product. 19. The product according to claim 1, in which the outer sheet or inner sheet constitutes an elastic non-woven fabric. 20. The product according to claim 1, in which the connecting parts, in each of which a part is formed with a hole, and the connecting parts in which a part with a hole is not formed, are formed in a regularly ordered configuration. 21. The product according to claim 1, in which the proportion of connecting parts, in each of which a part with an opening is formed, with respect to all connecting parts that are formed in the front or rear part having connecting parts, is not less than 10%. 22. The product according to claim 1, in which the proportion of connecting parts, in each of which a part with a hole is formed, with respect to the total number of connecting parts that are formed in the front or rear, is from 10 to 50% inclusive. 23. The product according to claim 1, in which the absorbent article is a stretchable absorbent article having an outer coating and an absorbent assembly attached to the outer coating, the elasticized part is formed in the outer coating, the sheet material constituting the outer sheet of each of the front and back is folded back onto the skin side of the surface of the inner sheet along the peripheral edge portion of the waist opening, and the backward-curved portion is connected to the skin-facing surface of the inner sheet and / or the absorbent / absorbent assembly using a binder that is applied to the entire area or part of the surface of the backward-curved portion, but not attached by melting to the connecting portions. 24. The product according to claim 1, in which the absorbent article is a stretchable absorbent article having an outer coating and an absorbent assembly attached to the outer coating, the elasticized portion is formed in the outer coating, and the part with the hole penetrates two sheets that are connected to each other so that a hollow part is formed, and penetrates through the outer coating in the thickness direction. 25. The product according to claim 1, in which the product is a pull-on absorbent product having an outer coating and an absorbent assembly attached to the outer coating, the elasticized portion is formed in the outer coating, and the part with the hole penetrates two sheets that are connected to each other so that a hollow part is formed, and the through hole formed as a result of penetration is covered with another sheet and does not penetrate the outer coating. 26. The product according to claim 1, in which the position of the connecting parts in the longitudinal direction of the product are essentially the same in the elasticized part located at the waist with respect to all of the rows of connecting parts. 27. The product according to claim 1, in which the connecting parts individually have connecting areas on opposite sides of the part with the hole in relation to the transverse direction of the product and on the upper side and lower side of the part with the hole in relation to the longitudinal direction of the product, and the total length (Lc + Ld) in the longitudinal direction of the product of the connecting areas located on the upper side and the lower side of the part with the hole is the same or less than the total length (La + Lb) in the transverse direction of the product of the connecting areas located on opposite sides parts with a hole. 28. The product according to item 27, in which the total length (La + Lb) is from 5 to 120% inclusive with respect to the full length (Lc + Ld). 29. The product according to claim 1, in which the connecting parts that make up the rows of connecting parts are arranged in a line in the transverse direction of the product, and the distance (L2) between the connecting parts that are adjacent to each other in the transverse direction of the product Y is more than complete width (W) of the connecting part. 30. The product according to claim 1, in which the connecting parts comprising the rows of the connecting parts are arranged in a line in the transverse direction of the product, and the ratio (L2 / W) of the distance (L2) between the connecting parts that are adjacent to each other in the transverse direction of the product Y, and the total width (W) of the connecting part is from 2 to 10 inclusive. 31. The product according to claim 1, in which the connecting parts comprising the rows of the connecting parts are arranged in a line in the transverse direction of the product, and the distance (L2) between the connecting parts that are adjacent to each other in the transverse direction of the product Y is from 6 to 12 mm inclusive. 32. The product according to claim 1, in which the absorbent article is a stretchable absorbent article having an outer coating and an absorbent assembly attached to the outer coating, the elasticized part is formed in the outer coating, a part of the outer cover in the front and a part of the outer cover in the back are connected to each other in a pair of side seals, and when the transverse lateral region of the outer coating of the article in the front or the transverse lateral region of the outer coating of the article at the rear is divided into a side adjacent to the absorbent assembly and a side adjacent to one of the side seals by halving the length of the transverse lateral region of the article in the transverse the direction of the product, a greater number of connecting parts, in each of which a part with an opening is formed, is formed on the side near the side seal Eden. 33. The product according to claim 1, in which the absorbent product is a stretchable absorbent product comprising a front panel, a rear panel and an absorbent assembly, an absorbent assembly connects a center portion of the front panel with respect to a transverse direction of the article and a center portion of the rear panel with respect to a transverse direction of the article, the front panel and the rear panel are connected to each other in a pair of side seals, and when the transverse side region of the front panel of the product or the transverse side region of the rear panel of the product is divided into a side adjacent to the corresponding absorbent assembly and a side near the corresponding one of the side seals, by dividing in half the length of the transverse side region of the product in the transverse direction of the product, a greater number of connecting parts, in each of which a part with an opening is formed, is formed on the side near the side seal. 34. The product according to p, in which the connecting parts, in each of which there is a part with an opening, are formed on the side close to the side seal, and no connecting part in which the part with the hole is present is formed on the side close to absorbent assembly.

Images