WO2011136364A1

WO2011136364A1 - Absorbent article

Info

Publication number: WO2011136364A1
Application number: PCT/JP2011/060450
Authority: WO
Inventors: 幸博伊藤; 青曹
Original assignee: ユニ・チャーム株式会社
Priority date: 2010-04-30
Filing date: 2011-04-28
Publication date: 2011-11-03
Also published as: CN201855366U; CN102232891A; JP5391140B2; JP2011229853A

Abstract

In the disclosed absorbent article (1), a first region (Y) is provided that is continuous in the lengthwise direction (L) in a first compressed groove (110); at least a portion of the first region (Y) is present in an excretory-orifice-contacting region (X); in a second compressed groove (120), a second region (Z) is provided that is continuous in the lengthwise direction (L); at least a portion of the second region (Z) is present in the excretory-orifice-contacting region (X); in the entire region within the first region (Y), a first highly compressed region (110A) and a first weakly compressed region (110B) are disposed adjacent to each other along the widthwise direction (W); and in the second region (Z), a portion (Z1) wherein a second highly compressed region (120A) and a second weakly compressed region (120B) are disposed adjacent to each other along the widthwise direction (W), and a portion (Z2) wherein only the second weakly compressed region (120B) is disposed along the widthwise direction (W) are provided.

Description

Absorbent articles

The present invention relates to an absorbent article.

Conventionally, an absorptive article provided with the 1st pressing part and the 2nd pressing part constituted so that it may squeeze from a surface sheet to an absorber is known (for example, refer to patent documents 1).

In such an absorbent article, the first pressing part is formed to extend in the longitudinal direction along the edge in the width direction of the absorbent body, and the second pressing part is adjacent to the first pressing part in the longitudinal direction. It is formed to extend.

Here, at least one of the first pressing portion and the second pressing portion has a discontinuous dot shape, that is, does not have a shape like a pressing groove continuous in the longitudinal direction.

According to such a configuration, when pressure is applied to the side surface of the absorbent article by the wearer's thigh, it is possible to reduce the stiffness of the compressed portion that comes into contact with the thigh.

JP 2006-326299 A

However, the applicant has found the following problems with the above absorbent article.

In the above-mentioned absorbent article, there is a problem that body fluid tends to leak from the gap between the compressed parts having a discontinuous dot shape.

Then, this invention is made | formed in view of the above-mentioned subject, and provides the absorbent article which can reduce the side leakage of a bodily fluid, reducing the rigidity of the area | region which contact | abuts to a thigh. Objective.

A first feature of the present invention is an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet. And the 1st pressing groove and the 2nd pressing groove comprised so that it may squeeze from the said surface sheet to the said absorber along the longitudinal direction of the said absorbent article are provided, The said 2nd pressing groove Is provided on the outer side in the width direction of the absorbent article than the first pressing groove, and in the first pressing groove, a plurality of first high pressure areas are provided, and the first The 1st high pressing area | region is provided so that the circumference | surroundings of 1 high pressing area may be enclosed, and the 2nd high pressing area may be provided in the said 2nd pressing groove, and this 2nd high pressing area A second low-pressure squeezing region is provided so as to surround the periphery of the first squeezed A first region continuous in the longitudinal direction is provided, at least a part of the first region is present in the excretion opening contact region of the absorbent article, in the second pressing groove, A second region continuous in the longitudinal direction is provided, at least a part of the second region is present in the excretory opening contact region, and in the entire width direction in the first region, in the width direction. The first high pressure area and the first low pressure area are disposed adjacent to each other, and the second high pressure area and the second low pressure area are arranged along the width direction in the second area. The gist is that there are provided a portion where the region is disposed adjacent to the region, and a portion where only the second low-compression region is disposed along the width direction.

FIG. 1 is a plan view seen from the skin contact surface side of the absorbent article according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line aa of the absorbent article according to the first embodiment of the present invention as seen from the skin contact surface side. FIG. 3 is an enlarged view of a region A of the absorbent article according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view taken along line bb in the enlarged view of the region A of the absorbent article according to the first embodiment of the present invention. Drawing 5 is a figure for explaining the manufacturing method of the absorptive article concerning a 1st embodiment of the present invention. FIG. 6: is the top view seen from the skin contact surface side of the absorbent article which concerns on the 2nd Embodiment of this invention.

(First embodiment of the present invention)
With reference to FIG. 1 thru | or FIG. 6, the absorbent article 1 which concerns on the 1st Embodiment of this invention is demonstrated. For example, the absorbent article 1 according to the present embodiment is a paper diaper, an incontinence pad, a sanitary napkin, or the like.

As shown in FIG. 1, the absorbent article 1 according to this embodiment is provided with a plurality of pressing grooves including a first pressing groove 110 and a second pressing groove 120. The 2nd pressing groove 120 is provided in the outer side of the width direction W of the absorbent article 1 rather than the 1st pressing groove 110. FIG.

In addition, the excretion opening | mouth contact | abutting area | region X of the absorbent article 1 which concerns on this embodiment is an area | region contact | abutted to a wearer's vaginal opening in the absorbent article 1, for example, the absorbent article 1 wears to a wearer's underwear. It is an area | region arrange | positioned between two undercarriage openings of underwear.

Moreover, the absorbent article 1 has a pair of central wing portions 40 formed so as to extend to both outer sides in the width direction W in the excretion opening contact region X. Here, when a wearer wears the absorbent article 1 in underwear, the wearer wraps the central wing part 40 in the underwear, and fixes the absorbent article 1 to the underwear.

Here, in the absorbent article 1, an intersection point Q between a line O in the longitudinal direction L passing through the center in the width direction W and a line (aa) in the width direction W passing through the center in the longitudinal direction L of the central wing portion 40 is defined. It may be “the center in the longitudinal direction L of the excretory opening contact region X”.

In the absorbent article 1 in which the central wing portion 40 is not provided, when the first pressing groove 110 is arranged so as to be curved inward in the width direction W along the longitudinal direction L, The line that connects the locations that are located most inside the width direction W in the first compressed groove 110 may be the above-described line (aa).

Or in the absorbent article 1 in which the central wing part 40 is not provided, when the 1st pressing groove 110 is arrange | positioned so that it may curve outside the width direction W along the longitudinal direction L, both sides The line that connects the positions that are located most outward in the width direction W in the first compressed groove 110 may be the above-described line (aa).

As shown in FIG. 2, the absorbent article 1 according to the present embodiment includes a liquid-permeable top sheet 11, a liquid-permeable second sheet 12, a liquid-impermeable back sheet 13, and a central wing part 40. And the absorbent body 20 disposed between the top sheet 11 and the second sheet 12 and the back sheet 13. In addition, the absorbent article 1 which concerns on this embodiment does not need to have the 2nd sheet | seat 12. FIG.

The absorbent body 20 is composed of pulverized pulp and a polymer absorbent polymer and a core wrap that wraps both. Here, the high molecular polymer is a granular polymer of a sodium acrylate copolymer.

Also, the core wrap is a sheet of any material that absorbs liquid. For example, a tissue may be used as the core wrap, or an air laid sheet in which hydrophilic fibers or pulverized pulp is formed into a sheet shape by the air laid method may be used.

Here, in the absorbent article 1 according to the present embodiment, the first pressing groove 110 and the second pressing groove 120 are configured to squeeze from the top sheet 11 to the absorbent body 20.

3 shows an enlarged view of the region A of the absorbent article 1 shown in FIG. 1, and FIG. 4 shows a bb cross-sectional view of the enlarged view.

As shown in FIG. 3, in the 1st pressing groove 110, the some 1st high pressing area | region 110A is provided, and the 1st low pressing area 110B is provided so that the circumference | surroundings of the 1st high pressing area | region 110A may be enclosed. ing.

Similarly, in the 2nd pressing groove 120, several 2nd high pressing area 120A is provided, and the 2nd low pressing area 120B is provided so that the circumference | surroundings of the 2nd high pressing area 120A may be enclosed.

Here, the thickness dimension of 110A of 1st high pressing areas is larger than the thickness dimension of 110B of 1st low pressing areas. Similarly, the thickness dimension of the second high pressing area 120A is larger than the thickness dimension of the second low pressing area 120B.

The thickness dimension was measured by the following measurement method. Specifically, in such a measurement method, the sample absorbent article 1 is impregnated with liquid nitrogen and frozen, then cut with a razor, returned to room temperature, and then subjected to an electron microscope (for example, KEYENCE VE7800). And measured at a magnification of 50 times. Here, the reason for freezing the sample absorbent article 1 is to prevent the thickness dimension from fluctuating due to compression during cutting.

Moreover, 110 A of 1st high pressing areas may be arrange | positioned in the longitudinal direction L and the width direction W between the 1st low pressing areas 110B arrange | positioned at the grid | lattice form like the example of FIG.

Moreover, in the 1st pressing groove 110, the 1st area | region Y continuous in the longitudinal direction L is provided. Here, at least a part of the first region Y exists in the excretory opening contact region X.

Similarly, in the 2nd pressing groove 120, the 2nd field Z continuing in the longitudinal direction L is provided. Here, at least a part of the second region Z exists in the excretory opening contact region X.

Here, in the entire region in the first region Y, the first high pressure region 110A and the first low pressure region 110B are arranged adjacently along the width direction W.

That is, straight lines extending in the width direction W such as the straight lines Y1 and Y2 shown in FIG. 3 are always in contact with the first high-pressure area 110A and the first low-pressure area 110B throughout the first area Y.

On the other hand, in the second region Z, the second high pressing region 120A and the second low pressing region 120B are disposed adjacently along the width direction W, and the second direction along the width direction W. A portion Z2 where only the low-pressure squeezing region 120B is disposed is provided.

That is, the straight line extending in the width direction W is always in contact with the second high-pressure squeezed region 120A and the second low-pressure squeezed region 120B in the portion Z1, and is only in contact with the second low-pressure squeezed region 120B in the portion Z2.

Moreover, as shown in FIG. 3, each of the first high pressure areas 110 </ b> A may be configured to be smaller than each of the second high pressure areas 120 </ b> A.

In addition, each of 1st high pressing area 110A may have a different magnitude | size and shape. Similarly, each of the second high pressing areas 120A may have a different size and shape.

Moreover, the length L1 of the part which 110A of 1st high pressing area | regions and the side edge 110E of the 1st pressing groove 110 contact is the part which 120A of 2nd high pressing area | regions and the side edge 120E of the 2nd pressing groove 120 contact. You may be comprised so that it may become longer than L2.

Moreover, the length L3 of the part which the 1st low pressing area | region 110B and the side edge 110E of the 1st pressing groove 110 are contacting is the contact between the 2nd low pressing area 120B and the side edge 120E of the 2nd pressing groove 120. You may be comprised so that it may become shorter than length L4 of the part which is doing.

The mass of the absorbent body 20 per unit area in the first compressed groove 110 (that is, the basis weight of the absorbent body 20) is the mass of the absorbent body 20 per unit area in the second compressed groove 120 (that is, the absorbent body). It may be configured to be larger than 20 weight per unit area).

Furthermore, the number of sheets arranged closer to the skin contact surface than the absorbent body 20 among the sheets squeezed in the first squeezing groove 110 is the number of sheets squeezed in the second squeezing groove 120. You may be comprised so that it may become more than the number of the sheets arrange | positioned rather than the absorber 20 at the skin contact surface side.

For example, as shown in FIG. 4, in the 1st pressing groove 110, the surface sheet 11 and the second sheet | seat 12 are arrange | positioned in the skin contact surface side rather than the absorber 20, In the 2nd pressing groove, Only the top sheet 11 is arranged closer to the skin contact surface than the absorbent body 20.

In addition, as shown in FIG. 1, the shape of the curve prescribed | regulated by the outer edge 20E of the absorber 20, the shape of the curve formed by the side edge 110E of the 1st pressing groove 110, and the side edge of the 2nd pressing groove 120 You may be comprised so that the shape of the curve formed by 120E may differ.

Next, a part of the manufacturing method of the absorbent article 1 according to this embodiment will be described with reference to FIG. In addition, about the method which is not described in FIG. 5, the existing method can be used.

As shown in FIG. 5, in step S101, the absorbent body 20 is generated by wrapping the laminated body 20A of pulverized pulp and absorbent polymer with a core wrap 20B.

In Step S102, the absorbent body 20 is disposed on the web 11A for the topsheet 11 that is continuously conveyed, and the web 11A for the topsheet 11 and the absorbent body 20 are bonded together with a hot melt adhesive.

In step S103, a plurality of compressed grooves are formed by performing compression processing using the pressure rolls 100A and 100B on the web 11A for the topsheet 11 and the absorbent body 20 that are bonded together.

In step S104, the web 13A for the back sheet 13 is bonded to the web 11A for the top sheet 11 and the absorbent body 20 subjected to the compression process.

In step S105, the absorbent article 1 is generated by cutting the bonded web 11A for the front sheet 11, the absorbent body 20, and the web 13A for the back sheet 13 into a predetermined size and shape using a product cutter. To do.

Here, since the squeezing region easily draws bodily fluid, according to the absorbent article 1 according to the present embodiment, the bodily fluid dropped on the excretion opening contact region X spreads in the width direction W direction and in the longitudinal direction L. It is guided in the longitudinal direction L by the continuous first pressing groove 110 and second pressing groove 120.

Moreover, according to the absorbent article 1 which concerns on this embodiment, 110 A of 1st high pressing areas and the 1st low pressing area 110B are arrange | positioned adjacently along the width direction W in the whole region in the 1st area | region Y. ing.

Therefore, the bending stiffness of the entire first compressed groove 110 tends to be more uniform, and when the pressure is applied to the side surface of the absorbent article 1 by the wearer's thigh, the shape of the first compressed groove 110 is maintained. It is easy to bend at.

Moreover, according to the absorbent article 1 which concerns on this embodiment, in the 2nd area | region Z, the 2nd high pressing area | region 120A and the 2nd low pressing area | region 120B are arrange | positioned adjacently along the width direction W. There are provided a portion Z1 and a portion Z2 in which only the second low pressing region 120B is disposed along the width direction W.

Accordingly, since the portion Z1 having a high bending stiffness and the portion Z2 having a soft bending stiffness are mixed in the second compressed groove 120, when pressure is applied to the side surface of the absorbent article 1 by the wearer's thigh, It is easy to bend without maintaining the shape of the 2 pressing grooves 120.

As a result, it is possible to reduce the side leakage of body fluids while reducing the rigidity of the region in contact with the thighs.

Moreover, according to the absorbent article 1 which concerns on this embodiment, the length L1 of the part which 110A of 1st high pressing area | regions and the side edge 110E of the 1st pressing groove 110 contact is 2nd high pressing area | region 120A and 1st. It is comprised so that it may become longer than the part L2 which the side edge 120E of the 2 pressing grooves 120 contacts.

That is, in the side edge 110E of the first compressed groove 110, there are many portions where the thickness greatly differs from the periphery of the first compressed groove 110, and pressure is applied to the side surface of the absorbent article 1 by the wearer's thigh. And it becomes easy to bend in the state where the shape of the 1st pressing groove 110 was maintained.

On the other hand, in the side edge 120E of the second pressing groove 120, there are many portions where the thickness does not differ greatly from the periphery of the second pressing groove 120, and pressure is applied to the side surface of the absorbent article 1 by the wearer's thigh. In this case, it becomes easier to bend without maintaining the shape of the second compressed groove 120.

Moreover, according to the absorbent article 1 which concerns on this embodiment, since each of the 1st high pressing area | region 110A is comprised so that it may become smaller than each of the 2nd high pressing area | region 120A, the 1st pressing groove | channel 110 is comprised. The overall bending stiffness can be made more uniform, and the portion Z1 having a high bending stiffness and the portion Z2 having a soft bending stiffness can be generated in the second compressed groove 120.

According to the absorbent article 1 according to the present embodiment, the mass of the absorbent body 20 per unit area in the first compressed groove 110 is larger than the mass of the absorbent body 20 per unit area in the second compressed groove 120. Therefore, since the first compression groove 110 is more rigid than the second compression groove 120, when the pressure is applied to the side surface of the absorbent article 1 by the wearer's thigh, the first compression groove 110 is And it becomes easy to bend in the state which maintained the groove shape, and the 2nd pressing groove 120 becomes easy to bend without maintaining a groove shape.

Similarly, according to the absorbent article 1 which concerns on this embodiment, the number of the sheets arrange | positioned in the skin contact surface side rather than the absorber 20 among the sheets squeezed within the 1st pressing groove 110 is as follows. Since the number of sheets squeezed in the second squeezing groove 120 is greater than the number of sheets disposed on the skin contact surface side of the absorbent body 20, the first squeezing groove 110 is the second squeezing groove 120. Therefore, when pressure is applied to the side surface of the absorbent article 1 by the wearer's thigh, the first compressed groove 110 is easily bent in a state in which the groove shape is maintained. The groove 120 is easily bent without maintaining the groove shape.

According to the absorbent article 1 which concerns on this embodiment, the shape of the curve prescribed | regulated by the outer edge 20E of the absorber 20, the shape of the curve formed by the side edge 110E of the 1st pressing groove 110, and a 2nd pressing groove Since the shape of the curve formed by the side edges 120E of 120 is different, when pressure is applied to the side surface of the absorbent article 1 by the wearer's thigh, it becomes difficult to bend along each curve.

(Second embodiment of the present invention)
With reference to FIG. 6, the absorbent article 1 which concerns on the 2nd Embodiment of this invention is demonstrated. Hereinafter, the absorbent article 1 according to the present embodiment will be described by paying attention to differences from the absorbent article 1 according to the first embodiment described above.

As shown in FIG. 6, in the absorbent article 1 which concerns on this embodiment, it is comprised so that the edge part of the 2nd pressing groove 120 may be arrange | positioned on the outer side of the width direction W rather than the outer edge 20E of the absorber 20. As shown in FIG. Yes.

As described above, the present invention has been described in detail using the above-described embodiments. However, it is obvious for those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Accordingly, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

Note that the entire content of Japanese Patent Application No. 2010-105733 (filed on Apr. 30, 2010) is incorporated herein by reference.

As described above, according to the present invention, it is possible to provide an absorbent article that can reduce the side leakage of body fluid while reducing the rigidity of the region that contacts the thigh.

DESCRIPTION OF SYMBOLS 1 ... Absorbent article 11 ... Top sheet 12 ... Second sheet 13 ... Back sheet 14 ... Side sheet 20 ... Absorbent body 110 ... First pressing groove 110A ... First high pressing area 110B ... First low pressing area 120 ... Second pressing Groove 120A ... second high pressing area 120B ... second low pressing area

Claims

An absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet,
A first pressing groove and a second pressing groove configured to squeeze from the top sheet to the absorbent body are provided along the longitudinal direction of the absorbent article,
The second pressing groove is provided on the outer side in the width direction of the absorbent article than the first pressing groove,
In the first pressing groove, a plurality of first high pressing areas are provided, and a first low pressing area is provided so as to surround the first high pressing area,
In the second pressing groove, a plurality of second high pressing areas are provided, and a second low pressing area is provided so as to surround the second high pressing area,
In the first squeezing groove, a first region continuous in the longitudinal direction is provided, and at least a part of the first region is present in the excretory opening contact region of the absorbent article,
In the second compressed groove, a second region continuous in the longitudinal direction is provided, at least a part of the second region is present in the excretory opening contact region,
In the entire region in the first region, the first high pressure region and the first low pressure region are disposed adjacent to each other along the width direction,
In the second region, a portion where the second high pressing region and the second low pressing region are disposed adjacent to each other along the width direction, and the second low pressing region along the width direction. The absorbent article characterized by being provided with the part in which only is arrange | positioned.
The absorbent article according to claim 1, wherein each of the first high pressure areas is configured to be smaller than each of the second high pressure areas.
The portion where the first high pressure region and the side edge of the first pressing groove are in contact with each other is configured to be longer than the portion where the second high pressure region and the side edge of the second pressing groove are in contact with each other. The absorptive article according to claim 1 characterized by things.
The portion where the first low pressure area and the side edge of the first pressing groove are in contact is shorter than the portion where the second low pressure area and the side edge of the second pressing groove are in contact. The absorbent article according to claim 1, which is configured as described above.
The mass of the absorber per unit area in the first pressing groove is configured to be larger than the mass of the absorber per unit area in the second pressing groove. Item 10. An absorbent article according to Item 1.
Of the sheets squeezed in the first squeezing groove, the number of sheets arranged closer to the skin contact surface than the absorber is the absorption of the sheet squeezed in the second squeezing groove. The absorbent article according to claim 1, wherein the absorbent article is configured to be larger than the number of sheets disposed on the skin contact surface side than the body.
The shape of the curve defined by the outer edge of the absorbent body is different from the shape of the curve formed by the side edge of the first pressing groove and the shape of the curve formed by the side edge of the second pressing groove. The absorbent article according to claim 1, wherein the absorbent article is configured as follows.