JP6859988B2 - Absorbent article - Google Patents

Description

The present invention relates to an absorbent article that is attached to the inseam of a wearer to absorb and retain a liquid such as urine.

Conventionally, an absorbent article worn on the inseam of a wearer has been known for the purpose of absorbing and retaining excreted body fluid. Examples of absorbent articles are disposable diapers, urine pads, and sanitary napkins. Disposable diapers include, for example, pants-type diapers in which the left and right sides of the front and back bodies are joined, and tape-type diapers that are worn by attaching a fastening tape attached to the back body to the front body. It has been known.

In addition, some absorbable articles are configured to be able to absorb a large amount of body fluid so that they can be worn for a long time and excreted by adults. For example, as such an absorbent article, a urine absorbing pad having a high absorption amount used for long-term care is known. Highly absorbed urine absorbing pads are generally used by inserting them into tape-type or pants-type disposable diapers, and are replaced as appropriate after excretion. Such a urine absorbing pad generally has an absorber composed of a large amount of absorbent material so that it can absorb a large amount of body fluid, and its shape also covers a large area of the wearer's body. It has been enlarged so that it can be done.

However, even with a high-absorption urine absorbing pad as described above, body fluids leak out when worn for a long time, and the tape-type or pants-type disposable diapers placed underneath are soiled. Sometimes. In other words, if you continue to wear it for a long time, you will continue to absorb body fluid repeatedly at one place (especially the inseam part) of the absorber. For this reason, if the diffusivity of the absorber is poor, the absorption load is partially increased, and when the absorption amount is saturated, the body fluid that cannot be completely absorbed flows out from the urine absorbing pad. On the other hand, in order to increase the absorption amount of the inseam part in the absorber, it is conceivable to increase the absorbent material of the inseam part to partially increase the absorption amount of the body fluid. Since the thickness is increased, there is a concern that the wearing feeling may be deteriorated and the comfort may be reduced.

Therefore, in order to enhance the diffusivity of a large absorber with such a high absorption amount, an absorbent article in which a part of the absorber is compressed in the thickness direction to form a squeeze line is known (Patent Document 1). And Patent Document 2). The absorber (absorbent core) disclosed in Patent Document 1 is densely embossed on a part of the absorber that requires a large amount of body fluid absorption and diffusivity, such as the inseam, and sparsely embossed on other parts. These embosses have a continuous pattern as a whole. Further, the absorber disclosed in Patent Document 2 has a lattice-shaped squeezing groove formed on the surface side, and the extending direction of the squeezing groove is configured to be different from the product longitudinal direction and the product width direction. There is. By forming a squeeze line on the absorber in this way, even when a large amount of body fluid is locally arranged, this body fluid is diffused along the squeeze line, so that the absorber It becomes possible to absorb body fluids in a wide range of, and as a result, the diffusivity of the absorber can be improved.

Japanese Unexamined Patent Publication No. 2004-16373 Japanese Unexamined Patent Publication No. 2015-16218

However, in the absorber in which the squeezed line is formed, there is a large difference between the diffusivity of the portion where the squeezed line is formed and the diffusivity of the region where the pressed line is not formed (non-squeezed region). Due to this difference in diffusivity, the body fluid diffuses widely along the squeezing line, but absorption into the non-squeezed area does not proceed, and the body fluid reaches the end of the absorber along the squeezing line. ， There was a problem of leaking from the end.

More specifically, in the absorber in which the squeeze line is formed, when the body fluid is absorbed by the absorber, the body fluid diffuses first along the squeeze line in time due to the capillary phenomenon, and is not squeezed. In the area, it will spread later. In this way, there is a time difference in the diffusion time of the body fluid between the site where the squeezed line is formed and the non-squeezed area. When the basis weight of the absorbent material constituting the absorber is low, the time difference of the diffusion time does not become a big problem, but if the basis weight of the absorbent material is increased in order to increase the absorption amount of the body fluid, it is not. The liquid absorption time in the squeezed area is slower. For this reason, in a highly absorbed absorber, the time difference in the diffusion time of the body fluid between the site where the squeezed line is formed and the non-squeezed area becomes larger, and in some cases, only the squeezed line gets wet with the body fluid and is not squeezed. It is possible that the region can hardly absorb body fluids. Furthermore, since the absorbent material is compressed in the area where the squeezed line is formed, the amount of body fluid absorbed is smaller than in the non-compressed area. Therefore, a large amount of body fluid could reach the end of the absorber along the squeeze line, causing leakage to the outside.

In addition, in order to solve the above problem, it is conceivable to reduce the interval between the squeezing lines formed on the absorber to facilitate the penetration of body fluid into the non-squeezed area. However, since the rigidity of the absorber increases in and around the squeezed wire, if the interval between the squeezed wires is narrowed and the density is increased, the entire absorber becomes hard to the touch and the wearing feeling of the absorbent article is impaired. There is.

Therefore, the present invention is effective in a non-squeezed region in an absorbent article in which a squeezed line is formed on the absorber in order to increase the absorption amount of body fluid and improve the diffusivity, even if the squeezed line is not densely formed. The solution is to diffuse the body fluids so that they can be absorbed over a wide range.

As a result of diligent studies on the means for solving the above problems, the inventor of the present invention forms a squeeze line on each absorber while increasing the amount of body fluid absorbed by laminating the absorbers in two or more layers, and further, each absorber. It was decided to cross the squeezing lines formed in. As a result, it was found that the body fluid can be effectively diffused to the non-squeezed area without forming a tightly squeezed line in each absorber, and the body fluid can be absorbed in a wide range. .. Then, the present inventor came up with the idea that the above problems could be solved based on this finding, and completed the present invention. Specifically, the present invention has the following configurations.

The present invention relates to absorbent articles such as disposable diapers, urine absorbing pads, and sanitary napkins. The absorbent article includes a liquid-permeable top sheet 10, a back sheet 20, and at least two absorbent bodies 30 and 40 stacked and arranged between them. As the back sheet 20, it is preferable to use a liquid-impermeable sheet member, but a liquid-permeable sheet member can also be used. The two absorbers 30 and 40 each have a plurality of squeezed lines 31 and 41 in which the absorber is recessed in the thickness direction. The squeezing lines 31 and 41 of the two absorbers intersect at least partially when viewed from the plane direction. The squeezing lines 31 and 41 may be recessed on the top sheet side (skin facing surface side) of the absorber, or may be recessed on the back sheet side (skin non-facing surface side). It may be recessed on both sides. Further, "viewed from the plane direction" means to be viewed from the direction facing the top sheet 10 or the back sheet 20.

By stacking and arranging the two absorbers 30 and 40 in the thickness direction as in the above configuration, the absorption amount of the entire absorbent article can be increased. Further, by forming the squeezing lines 31 and 41 on the absorbers 30 and 40, the diffusibility of the body fluid can be enhanced. By arranging the absorbers 30 and 40 so as to intersect each other's squeezing lines 31 and 41, the body fluid can be effectively permeated into the region where the squeezing line is not formed (non-squeezed region). It will be possible. That is, the body fluid diffused along the squeezing line of one absorber is easily absorbed into the non-squeezed region of the other absorber. For this reason, it becomes difficult for the body fluid diffused along the squeezing line of one of the absorbers to reach the end portion, and it is possible to effectively prevent the situation where the body fluid leaks to the outside. In addition, since the body fluids can be absorbed in a wide range of the two-layer absorbers 30 and 40, the amount of body fluids absorbed is improved and the wearer is less likely to feel uncomfortable even when worn for a long time. .. Further, by forming the squeezing lines 31 and 41 in the two-layer absorbers 30 and 40, respectively, it is not necessary to form the squeezing lines densely in each absorber. Therefore, it is possible to prevent each absorber from becoming hard to the touch.

In the absorbent article of the present invention, the two absorbers 30 and 40 may have a plurality of non-squeezed regions 32 and 42 surrounded by the squeezing lines 31 and 41, respectively. In this case, it is preferable that at least a part of the squeezed line of one absorber overlaps the unsqueezed region of the other absorber.

Since the non-squeezed areas 32 and 42 are the parts surrounded by the squeezing lines 31 and 41 as in the above configuration, it becomes easy to guide the body fluid to the non-squeezed areas 32 and 42 as well. Further, since a part of the squeezed line of at least one absorber overlaps the uncompressed region of the other absorber, the body fluid diffused through the squeezed line can be easily introduced into the uncompressed region.

In the absorbent article of the present invention, the two absorbers 30 and 40 may have a plurality of intersections 33 and 43 at which the squeezing lines 31 and 41 intersect, respectively. In this case, it is preferable that at least a part of the intersection of one absorber overlaps the unsqueezed region of the other absorber.

As in the above configuration, since the squeezing lines 31 and 41 intersect at the intersections 33 and 43 formed on the absorbers 30 and 40, the body fluid tends to stay. Then, by superimposing the intersection of one of the absorbers on the non-squeezed region of the other absorber, the body fluid staying at the intersection can be effectively permeated into the non-squeezed region.

In the absorbent article of the present invention, when each of the absorbers 30 and 40 has a plurality of intersections 33 and 43, the intersection of one absorber and the intersection of the other absorber are at least partially. It is preferable that they overlap. That is, at least a part of the plurality of intersections formed on one absorber may overlap with at least a part of the plurality of intersections formed on the other absorber.

By overlapping the intersections of the respective absorbers as in the above configuration, the body fluid can be effectively circulated from one absorber to the other absorber through the overlapped intersections. That is, the body fluid diffused along the squeeze line of one absorber once stays at the intersection, but at that time, it moves to the squeeze line of the other absorber through the intersection of the other absorber. By overlapping the intersections of the respective absorbers in this way, the liquid diffusion function of the squeezed lines of both absorbers can be effectively exerted.

In the present invention, it is assumed that the two absorbers are the first absorber 30 located on the top sheet 10 side and the second absorber 40 located on the back sheet 20 side. In this case, the second absorber 40 has a squeezed line 41 having a recessed surface on the side of the first absorber 30, and the second absorber 40 and the first absorber 30 are formed at the portion where the squeezed line 41 is formed. It is preferable that a gap is formed between the two.

As in the above configuration, the body fluid absorbed by the first absorber 30 from the top sheet 10 side is formed by forming a gap between the first absorber 30 and the second absorber 40. It flows into the gap and is effectively diffused into the second absorber 40.

In the absorbent article of the present invention, the first absorber 30 is formed with a squeeze line 31 having a recessed surface on the side of the second absorber, and the second absorber is formed at a portion where the squeeze line 31 is formed. It is preferable that a gap is formed between the 40 and the 40.

By forming the squeezing line 31 in which the back surface of the first absorber 30 is recessed as in the above configuration, the body fluid that has permeated the first absorber 30 easily flows down to the second absorber 40. Become.

The absorbent article of the present invention further includes a third absorber 70 between the top sheet 10 and the first absorber 30, or between the back sheet 20 and the second absorber 40. May be. In this case, it is preferable that the third absorber 70 also has a plurality of squeezed lines 71 recessed in the thickness direction, similarly to the first absorber 30 and the second absorber 40.

By further providing the third absorber 70 as in the above configuration, the absorption amount of the entire absorbent body can be improved. Further, by forming the squeeze line 71 also in the third absorber 70, the liquid diffusibility can be maintained.

In the absorbent article of the present invention, the squeeze line of one absorber extends in the longitudinal direction of the absorbent article, and the squeeze line of the other absorber extends in the width direction of the absorbent article. It may be extended.

By crossing the squeeze line of one absorber extending in the longitudinal direction and the squeeze line of the other absorber extending in the width direction as in the above configuration, the body fluid is diffused in the longitudinal direction and at the same time in the width direction. It becomes possible to diffuse. In particular, body fluids are difficult to diffuse in the longitudinal direction, and body fluids tend to leak from the edges in the width direction. Therefore, it is preferable to form a squeeze line extending in the longitudinal direction on the absorber arranged in the upper layer and a squeeze line extending in the width direction in the absorber arranged in the lower layer. As a result, the body fluid that first comes into contact with the upper absorber can be diffused in the longitudinal direction, and then the body fluid that has penetrated into the lower absorber can be diffused in the width direction. As a result, the body fluid can be efficiently diffused in the longitudinal direction, and at the same time, leakage from the end portion in the width direction can be prevented.

In the absorbent article of the present invention, one absorber has a plurality of non-squeezed regions surrounded by a squeeze line, and the squeeze line of the other absorber is directed in the longitudinal direction of the absorbent article. It may extend or extend in the width direction of the absorbent article.

As in the above configuration, the squeezed lines formed on one absorber form, for example, a grid pattern to form a non-squeezed region surrounded by the squeezed lines, and the squeezed lines formed on the other absorber. Can also be formed so as to extend in the longitudinal direction or the width direction. Even in such a form, the squeezing lines 31 and 41 of the two absorbers intersect at least partially when viewed from the plane direction, so that the body fluid can be effectively diffused to the non-squeezed area and the body fluid can be spread over a wide range. Can be absorbed.

According to the present invention, in an absorbent article in which a squeezed line is formed on the absorber in order to increase the absorption amount of the body fluid and improve the diffusivity, it is effective in the non-squeezed region without forming the squeezed line densely. It is possible to diffuse the body fluid and absorb the body fluid in a wide range. As a result, it is possible to prevent the leakage of body fluid from the end portion of the absorbent body without impairing the wearing feeling of the absorbent article.

FIG. 1 is a plan view showing an absorbent article according to the first embodiment. FIG. 2 is a cross-sectional view taken along the line II-II shown in FIG. FIG. 3 shows a state in which the upper layer absorber and the lower layer absorber of the absorbent article according to the first embodiment are separated. FIG. 4 shows a state in which the upper layer absorber and the lower layer absorber of the absorbent article according to the first embodiment are overlapped. FIG. 5 is an enlarged view of the pattern of the squeezed lines formed on the upper layer absorber and the lower layer absorber. FIG. 6 shows a state in which the upper layer absorber and the lower layer absorber of the absorbent article according to the second embodiment are separated. FIG. 7 shows a state in which the upper layer absorber and the lower layer absorber of the absorbent article according to the second embodiment are overlapped. FIG. 8 is an enlarged view of the pattern of the squeezed lines formed on the upper layer absorber and the lower layer absorber. FIG. 9 shows a state in which the upper layer absorber and the lower layer absorber of the absorbent article according to the third embodiment are separated. FIG. 10 shows a state in which the upper layer absorber and the lower layer absorber of the absorbent article according to the third embodiment are overlapped. FIG. 11 shows an example of the cross-sectional shape of the upper layer absorber and the lower layer absorber. FIG. 12 shows an example of the cross-sectional shape of the upper layer absorber, the lower layer absorber, and the additional absorber.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to the forms described below, and includes those which are appropriately modified by those skilled in the art from the following forms to the extent obvious to those skilled in the art.

In the specification of the present application, "A to B" means "A or more and B or less".
Further, in the specification of the present application, the "longitudinal direction" means the direction connecting the front body located on the abdominal side of the wearer and the back body located on the back side of the wearer among the absorbent articles. Further, the "width direction" means a direction orthogonal to the longitudinal direction of the absorbent article in a plane. In FIG. 1 of the present application, the longitudinal direction of the absorbent article is indicated by the Y-axis, and the width direction of the absorbent article is indicated by the X-axis.
Further, in the specification of the present application, the “skin facing surface” means a surface facing the wearer's skin when the absorbent article is worn. Further, the “non-skin facing surface” means a surface that does not face the wearer's skin when the absorbent article is worn.

[1. First Embodiment]
The absorbent article according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 5. The absorbent article according to the first embodiment is configured as a large urine absorbing pad. FIG. 1 is a plan view of the entire absorbent article 100, and FIG. 2 schematically shows a cross-sectional shape taken along line II-II shown in FIG. In the cross-sectional view of FIG. 2, in order to show the configuration of the absorbent article 100 in an easy-to-understand manner, gaps are provided between various constituent members, but in reality, there are gaps between the constituent members. Is rarely formed.

As shown in FIG. 1, the absorbent article 100 includes a front body 1 located on the abdominal side of the wearer, a back body 2 located on the back side of the wearer, and an inseam 3 located between them. In addition, it can be divided in the longitudinal direction. Specifically, the absorbent article 100 has a shape that can be expressed as a gourd type or an hourglass type in a plan view. That is, the absorbent article 100 has a constricted portion in the lower crotch 3, which is a portion where the width of the absorbent article 100 is the narrowest. On the other hand, the front body 1 and the back body 2 of the absorbent article 100 have side flaps that extend to the left and right outside in the width direction from the constricted portion of the inseam 3. That is, in the portion where the side flaps are formed, the width of the front body 1 and the back body 2 is formed wider than the width of the constricted portion of the inseam 3. In this way, the absorbent article 100 can be gourd-shaped (hourglass-shaped). However, the shape of the absorbent article 100 can be changed as appropriate, and for example, it can be a simple rectangular shape.

Further, as shown in FIGS. 1 and 2, the absorbent article 100 basically includes a liquid-permeable top sheet 10, a liquid-impermeable back sheet 20, and a plurality of intervening liquid-permeable articles 100. It has absorbers 30 and 40. In the specification of the present application, the absorber located on the top sheet 10 side is referred to as "upper layer absorber 30" (first absorber), and the absorber located on the back sheet 20 side is referred to as "lower layer absorber 40" (second absorber). Absorber). As shown in the cross-sectional view of FIG. 2, the upper layer absorber 30 and the lower layer absorber 40 are overlapped in the thickness direction thereof. Further, the upper layer absorber 30 and the lower layer absorber 40 are joined by using an adhesive such as a hot melt adhesive so that the relative positions of the upper layer absorber 30 and the lower layer absorber 40 do not shift. The top sheet 10 covers the skin-facing surfaces of the laminated absorbers 30 and 40, and the back sheet 20 covers the skin-non-facing surfaces of the laminated absorbers 30 and 40. As shown in FIGS. 1 and 2, around the absorbers 30 and 40, the top sheet 10 and the back sheet 20 are bonded to each other by a hot melt adhesive, a heat seal, an ultrasonic seal, or the like. There is. As a result, each of the absorbers 30 and 40 is surrounded by a joint portion between the top sheet 10 and the back sheet 20. Further, a pair of three-dimensional gathers 50 are formed on both the left and right sides of the absorbent article 100 in the width direction. The pair of three-dimensional gathers 50 stand on both the left and right sides of the absorber, and function as a leak-proof wall for preventing urine leakage. Further, the absorbent article 100 may include a cover sheet 60 that covers the non-skin facing surface of the back sheet 20. Hereinafter, each member constituting the absorbent article 100 will be described.

The top sheet 10 is a sheet-like member that comes into direct contact with the skin of the wearer's inseam and allows body fluids such as urine to permeate through the absorbers 30 and 40. Therefore, the top sheet 10 is made of a highly flexible liquid-permeable material. Examples of the liquid permeable material constituting the top sheet 10 are a woven fabric, a non-woven fabric, or a porous film. Further, for example, fibers of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon may be hydrophilized to be further made into a non-woven fabric. Examples of the non-woven fabric include an air-through non-woven fabric, a point-bonded non-woven fabric, a spunbonded non-woven fabric, and a melt-blown non-woven fabric.

The back sheet 20 is a sheet-like member for preventing the body fluid that has passed through the top sheet 10 and is absorbed by the absorbers 30 and 40 from leaking to the outside of the diaper. Therefore, the back sheet 20 is preferably made of a liquid-impermeable material. An example of the liquid-impermeable material constituting the back sheet 20 is a liquid-impermeable film made of polyethylene resin. In particular, as the back sheet 20, it is preferable to use a microporous polyethylene film in which a plurality of fine pores of 0.1 to 4 μm are formed in order to secure air permeability while maintaining liquid impermeableness.

The absorbers 30 and 40 are members for absorbing body fluids such as urine and holding the absorbed body fluids. The absorbers 30 and 40 are arranged between the liquid-permeable top sheet 10 and the liquid-impermeable back sheet 20. It is preferable that the upper layer absorber 30 and the lower layer absorber 40 are joined by a hot melt adhesive or the like so that their relative positions do not shift from each other. Each of the absorbers 30 and 40 is composed of absorbent materials 34 and 44 and core wrap sheets 35 and 45 covering the absorbent materials 34 and 44. As the absorbent materials 34 and 44, for example, fluff pulp obtained by crushing a fiber material such as softwood or hardwood, a highly absorbent polymer (SAP), or a hydrophilic sheet may be used. Further, as the absorbent materials 34 and 44, one of fluff pulp, a highly water-absorbent polymer, and a hydrophilic sheet may be used alone, or two or more of them may be used in combination. Generally, the absorbent materials 34 and 44 are composed of a fluff pulp in which a highly water-absorbent polymer is sprayed. The core wrap sheets 35 and 45 are sheet members for holding the shape of the core wrap sheets 35 and 45 by covering the absorbent materials 34 and 44. As the core wrap sheets 35 and 45, sheet members having liquid permeability are used. As examples of the core wrap sheets 35 and 45, thin paper such as tissue paper or a known non-woven fabric can be used.

Further, in the present invention, it is preferable that the upper layer absorber 30 and the lower layer absorber 40 have different sizes. In particular, in the present invention, the length and width of the upper layer absorber 30 are preferably smaller than the length and width of the lower layer absorber 40. In this case, the upper layer absorber 30 is arranged so as to be overlapped on the lower layer absorber 40, centering on the crotch portion 3 of the absorbent article 100. As a result, the amount of absorption in the inseam 3 where the amount of body fluid excreted is large can be increased. However, the size and shape of the upper layer absorber 30 and the lower layer absorber 40 may be exactly the same.

The pair of three-dimensional gathers 50 stand on both the left and right sides of the absorber, and serve as a leak-proof wall for preventing urine leakage. The three-dimensional gather 50 is generally composed of a side sheet 51 and one or more elastic elastic members 52. In the crotch portion 3, the side sheet 51 is open so that the outer portion in the width direction is joined to the skin-facing surface side of the top sheet 10 and the back sheet 20, and the inner portion in the width direction is joined. Then, one or a plurality of elastic elastic members 52 are fixed to the inner end of the opened side sheet 51 in an extended state along the longitudinal direction. Therefore, when the elastic elastic member 52 contracts, the inner end portion of the side sheet 51 rises due to the contraction force of the elastic elastic member 52, and wrinkles (gathers) are formed at the portion where the elastic elastic member 52 contracts. As the side sheet 51, for example, a non-woven fabric sheet obtained by a manufacturing method such as card embossing or spunbond can be used, and it is particularly preferable to use a non-woven fabric sheet such as SMS or SMMS having high waterproofness and breathability.

The cover sheet 60 is a member for reinforcing the back sheet 20 and improving its feel. The cover sheet 60 is attached to the back sheet 20 on the non-skin facing surface side. As a material constituting the cover sheet 60, a woven fabric or a non-woven fabric is used. In particular, as a material constituting the cover sheet 60, it is preferable to use a non-woven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester, or a wet non-woven fabric.

As shown in FIGS. 1 and 2, in the absorbent article 100 according to the present invention, each of the absorbers 30 and 40 is formed with a plurality of squeezing lines 31 and 41 in which the absorbers 30 and 40 are recessed in the thickness direction. One of the features is that it is done. That is, a plurality of squeezing lines 31 and 41 are formed in each of the upper layer absorber 30 and the lower layer absorber 40, respectively. The squeezing lines 31 and 41 can be formed by partially pressing and compressing the absorbers 30 and 40 from both sides or one of the skin facing surface side and the skin non-facing surface side. Therefore, at the sites where the squeezing lines 31 and 41 are formed, the densities of the absorbent materials 34 and 44 in the absorbent bodies 30 and 40 are increased. The squeeze line 31 formed on the upper layer absorber 30 and the squeeze line 41 formed on the lower layer absorber 40 form a pattern that at least partially intersects each other when viewed from the plane direction. Hereinafter, the pattern of the squeeze line 31 formed on the upper layer absorber 30 and the pattern of the squeeze line 41 formed on the lower layer absorber 40 will be described in detail.

3A and 3B are plan views in which the upper layer absorber 30 and the lower layer absorber 40 are conceptually separated and displayed side by side. Further, FIGS. 3 (c) and 3 (d) schematically show the cross-sectional shapes of the absorbers 30 and 40 on the lines III-III. Further, FIG. 4A shows a state in which the upper layer absorber 30 and the lower layer absorber 40 are overlapped, and FIG. 4B schematically shows the cross-sectional shape of the absorber in the IV-IV line. There is. Further, FIG. 5 shows an enlarged pattern of the squeezing line 31 formed on the upper layer absorber 30 and the pattern of the squeezing line 41 formed on the lower layer absorber 40.

As shown in FIGS. 3 to 5, the upper layer absorber 30 is formed with squeezing lines 31 in a square lattice pattern. The "square grid pattern" referred to here means that a plurality of squeezed lines extending parallel to the longitudinal direction and a plurality of squeezed lines extending parallel to the width direction intersect to partition a square non-squeezed area. Refers to a pattern. In particular, in the present embodiment, the pattern of the squeezed lines 31 in the upper layer absorber 30 is a regular pattern (square grid pattern) in which the non-squeezed regions 32 surrounded on all sides by the squeezed lines 31 are all square. It has become. As described above, it is considered that the upper layer absorber 30 is formed with a plurality of squeezed lines 31, a non-squeezed region 32 surrounded by the squeezed lines 31, and an intersection 33 where the squeezed lines 31 intersect. can do. Hereinafter, for convenience, the squeezed line 31 in the upper layer absorber 30 will be referred to as an “upper squeezed line 31”, the non-squeezed region 32 will be referred to as an “upper non-squeezed region 32”, and the intersection 33 will be referred to as an “upper intersection 33”.

On the other hand, the squeeze lines 41 are formed in the lower layer absorber 40 in an oblique lattice pattern. The "oblique grid pattern" referred to here is a pattern in which a plurality of squeezing lines extending in a direction inclined with respect to the longitudinal direction and the width direction intersect to partition an oblique (diamond) non-squeezed area. Say. In particular, in the present embodiment, the pattern of the squeezed lines 41 in the lower layer absorber 40 is a regular pattern (regularly oblique) in which all the non-squeezed regions 42 surrounded on all sides by the squeezed lines 41 are regular diagonals (regular rhombuses). It has a square grid pattern). As described above, it is considered that the lower layer absorber 40 also has a plurality of squeezed lines 41, a non-squeezed region 42 surrounded by the squeezed lines 41, and an intersection 43 where the squeezed lines 41 intersect. can do. Hereinafter, for convenience, the squeezed line 41 in the lower absorber 40 will be referred to as a “lower squeezed line 41”, the non-squeezed region 42 will be referred to as a “lower non-squeezed region 42”, and the intersection 43 will be referred to as a “lower intersection 43”. ..

Further, in the present embodiment, the upper pressing line 31 is formed by compressing and denting the upper layer absorber 30 from the skin facing surface side. Similarly, the lower pressing line 41 is formed by compressing and denting the lower layer absorber 40 from the skin facing surface side. Therefore, in the portion where the lower pressing line 41 is formed on the lower layer absorber 40, a gap is formed between the upper layer absorber 30 and the lower layer absorber 40 in a state of being overlapped with each other.

4 and 5 show a state in which the pattern of the upper squeezing line 31 in the shape of a square grid and the pattern of the lower squeezing line 41 in the shape of a regular rhombus are superimposed. As can be seen from each figure, in the present embodiment, the area of the upper non-squeezed region 32 is larger than the area of the lower non-squeezed region 42. Therefore, when the upper layer absorber 30 and the lower layer absorber 40 are overlapped, the lower non-squeezed region 42 (regular rhombus) fits within the range of the upper non-squeezed region 32 (square).

Further, in the present embodiment, four lower intersections defining a certain lower non-squeezed region 42 (regular rhombus) are formed on each of the four upper squeezing lines 31 defining a certain upper non-squeezed region 32 (square). The parts 43 overlap. Therefore, as shown in FIGS. 4 and 5, it can be seen that the lower non-squeezed region 42 (regular rhombus) fits perfectly within the range of the upper non-squeezed region 32 (square). That is, the center of the upper non-squeezed region 32 (square) (diagonal intersection) and the center of the lower non-squeezed region 42 (regular diagonal) (diagonal intersection) coincide with each other. Further, as shown in FIG. 3, the length L in the longitudinal direction of the upper non-squeezed region 32 (square) is the diagonal length D1 along the longitudinal direction of the lower non-squeezed region 42 (regular oblique shape). Almost equal (L = D1). Further, the length B in the width direction of the upper non-squeezed region 32 (square) is substantially equal to the diagonal length D2 along the width direction of the lower non-squeezed region 42 (B = D2). In addition, "almost" in the present specification means that an error of ± 5% is allowed. By satisfying these conditions, four lower intersections defining a certain lower non-squeezed region 42 (regular rhombus) on the upper squeezing lines 31 on the four sides defining the upper non-squeezed region 32 (square), respectively. The parts 43 will overlap.

Further, as shown in FIGS. 4 and 5, the upper intersection 33 overlaps the center (diagonal intersection) of the lower non-squeezed region 42 (regularly oblique), respectively. From another point of view, in the plurality of lower non-squeezed regions 42 (regular rhombuses), there are those in which the upper intersections 33 overlap and those in which the upper intersections 33 do not overlap. In the examples shown in FIGS. 4 and 5, among the plurality of rows of the lower non-squeezed region 42, every other row, the row in which the upper intersection 33 overlaps and the row in which the upper intersection 33 does not overlap alternate. You can see that they are lined up in. Similarly, among the plurality of rows of the lower non-squeezed region 42, it can be seen that every other row, the row in which the upper intersection 33 overlaps and the row in which the upper intersection 33 does not overlap are alternately arranged.

As described above, by forming the pattern of the upper pressing line 31 (square grid pattern) and the pattern of the lower pressing line 41 (regular oblique grid pattern), the pressing lines are not densely formed in one absorber. However, the body fluid can be effectively diffused in the non-squeezed area, and the body fluid can be absorbed in a wide range of the entire two-layer absorber. That is, the body fluid diffused along the upper pressing line 31 of the upper layer absorber 30 is absorbed by the lower non-squeezed region 42 of the lower layer absorber 40. Therefore, it becomes difficult for the body fluid diffused along the upper pressing line 31 of the upper layer absorber 30 to reach the end portion, and it is possible to effectively prevent a situation in which the body fluid leaks to the outside. In addition, since the body fluids can be absorbed in a wide range of the two-layer absorbers 30 and 40, the amount of body fluids absorbed is improved and the wearer is less likely to feel uncomfortable even when worn for a long time. .. At the intersections 33 and 43 formed on the absorbers 30 and 40, the squeezing lines 31 and 41 intersect, so that the body fluid tends to stay. Therefore, by superimposing the upper intersection 33 of the upper absorber 30 on the lower non-squeezed region 42 of the lower absorber 40, the body fluid accumulated in the upper intersection 33 is effectively permeated into the lower non-squeezed region 42. Is possible.

Further, as in the present embodiment, by setting the columns and rows of the lower non-squeezed region 42 where the upper intersection 33 overlaps every other row and every other row, the body fluid that has permeated the upper layer absorber 30 can be made farther. Can be diffused to the area of. Therefore, the body fluid that has permeated the upper layer absorber 30 can be diffused and permeated over a wide range of the lower layer absorber 40.

In addition, the squeezing line has a function of flowing the liquid as a groove and a function of diffusing the liquid along the squeezing part by utilizing the capillary phenomenon in the non-squeezing area around the squeezing part. Even when used in a form that does not function as a groove, liquid transfer occurs from the squeezed line of one absorber to the squeezed or unsqueezed area of the other absorber. The reason is as follows. That is, the squeeze wire is made by crushing the absorbent material constituting the absorber with pressure. Therefore, when the absorber absorbs the liquid at the site where the squeeze line is formed, the thickness changes. That is, when the pulp or SAP on the squeezing line absorbs liquid, the space between the pulps loosens over time, and the SAP swells, so the squeezing line gradually becomes shallower, and finally the non-squeezed area after swelling. The thickness is almost the same. In this way, even if the squeeze line has a depth before absorption, the depth gradually becomes shallower as the liquid absorption progresses. Therefore, it becomes easy to transfer the liquid from the squeezed line of one absorber to the squeezed line or non-squeezed region provided in the other absorber overlapping the squeezed line. In other words, since the squeeze line is a groove in the initial state, the liquid flows in preferentially to this squeeze line. Then, since the squeezed line swells at the site where the squeezed line is formed as the liquid absorption progresses, as described above, the liquid flows to the squeezed line or non-squeezed area provided on the other absorber overlapping the swelled squeezed line. Moving.

Here, specific numerical values relating to the components of the absorbent article will be described. For example, the thickness of each absorber 30 and 40, that is, the thickness of the non-squeezed regions 32 and 42 is preferably 5 mm to 20 mm, and particularly preferably 8 mm to 15 mm. Further, the thickness of each absorber 30 and 40 at the site where the squeezed lines 31 and 41 are formed is preferably 1 mm to 10 mm, particularly preferably 2 mm to 5 mm. However, as a matter of course, the thickness of the portion where the squeezed lines 31 and 41 are formed is smaller than the thickness of the non-squeezed regions 32 and 42. For example, the thickness of the portion where the squeezed lines 31 and 41 are formed is 3% to 50%, particularly preferably 5% to 20%, based on the thickness of the non-squeezed regions 32 and 42.

The width of each of the squeezed lines 31 and 41 is preferably 1 mm to 5 mm, and particularly preferably 2 mm to 4 mm. The length L of the upper non-squeezed region 32 shown in FIG. 2 is preferably 10 mm to 50 mm, particularly preferably 20 mm to 40 mm or 30 mm. The preferred numerical range of the width B of the upper non-squeezed region 32 is the same as the length L described above. The length L and the width B are preferably substantially equal, but may be different. That is, the shape of the upper non-squeezed region 32 is not limited to a square, and may be another quadrangle. The diagonal length D1 of the lower non-squeezed region 42 shown in FIG. 2 in the longitudinal direction is preferably 10 mm to 50 mm, and particularly preferably 20 mm to 40 mm or 30 mm. The preferred numerical range of the diagonal length D2 in the width direction of the lower non-squeezed region 42 is the same as the length D1 described above. The length D1 and the length D2 are preferably approximately equal, but may be different. That is, the shape of the lower non-squeezed region 42 is not limited to the regular oblique shape (regular rhombus), and other oblique shapes can be used. Further, as described above, it is a preferable embodiment that the length L and the length D1 are substantially equal, and the width B and the length D2 are substantially equal, but the present invention is not limited thereto.

Further, the squeezing lines 31 and 41 formed on the absorbers 30 and 40 have a wide range in the longitudinal direction so that the body fluid discharged in the vicinity of the inseam can be widely diffused to the front body and the back body. It is preferably formed in. Specifically, the length of the region in which the squeezing lines 31 and 41 are formed is preferably 60% or more with respect to the length of each of the absorbers 30 and 40 in the longitudinal direction, and is preferably 60% to more. It is particularly preferably 100%, 70% to 100%, or 80% to 100%. Further, the squeezing lines 31 and 41 formed on the absorbers 30 and 40 have a wide range in the width direction so that the body fluid discharged near the center in the width direction can be widely diffused to the outside in the width direction. It is preferably formed in. Specifically, the maximum width in the width direction of the region where the squeezing lines 31 and 41 are formed is preferably 60% or more with respect to the minimum width in the width direction of the absorbers 30 and 40, and is preferably 60% to It is particularly preferably 100%, 70% to 100%, or 80% to 100%.

In this embodiment, the upper squeezed line 31 is formed in a square grid pattern in which the area of the non-squeezed region is relatively large, and the lower squeezed line 41 is positive in that the area of the non-squeezed region is relatively small. An example in which the pattern is formed in an oblique grid pattern has been described. However, the pattern of this squeezing line can be exchanged between the upper squeezing line 31 and the lower squeezing line 41. That is, it is also possible to apply the above-mentioned square grid-like pattern as the pattern of the lower squeeze line 41 and to apply the regular rhombus grid-like pattern as the pattern of the upper squeeze line 31.

Further, the figure shows an example in which the squeezing lines 31 and 41 are formed by denting both the absorbent materials 34 and 44 and the core wrap sheets 35 and 45 constituting the absorbent bodies 30 and 40. However, the squeezing lines 31 and 41 may be formed by compressing and denting at least the absorbent materials 34 and 44. That is, after the absorbent materials 34 and 44 are compressed to form the squeezed lines 31 and 41, the core wrap sheets 35 and 45 may be joined so as to cover the absorbent materials 34 and 44. In this sense, it is sufficient that the squeezing lines 31 and 41 are formed on the absorbent materials 34 and 44 constituting the absorbent bodies 30 and 40, respectively.

[2. Second Embodiment]
Subsequently, the absorbent article according to the second embodiment of the present invention will be described with reference to FIGS. 6 to 8. Regarding the second embodiment, the description of the same configuration as that of the first embodiment described above will be omitted, and the description will be focused on the configuration different from that of the first embodiment.

6 (a) and 6 (b) show the upper layer absorber 30 and the lower layer absorber 40 separately, and FIGS. 6 (c) and 6 (d) show the cross-sectional shape in VI-VI. .. FIG. 7 (a) shows a state in which the upper layer absorber 30 and the lower layer absorber 40 are overlapped, and FIG. 7 (b) shows the cross-sectional shape in VII-VII. Further, FIG. 8 shows an enlarged pattern of the squeezing line 31 formed on the upper layer absorber 30 and the pattern of the squeezing line 41 formed on the lower layer absorber 40. Note that, in FIGS. 6 and 7, only the upper layer absorber 30 and the lower layer absorber 40 are conceptually extracted and shown. Although not shown in FIGS. 6 and 7, the second embodiment described here also includes at least a top sheet 10 and a back sheet 20 as in the first embodiment described above. Further, a pair of three-dimensional gathers 50 and a cover sheet 60 may be provided.

In the second embodiment, the patterns of the squeezing lines 31 and 41 formed on the absorbers 30 and 40 are different from those in the first embodiment. As shown in FIGS. 6 to 8, the upper squeezing line 31 is formed in the upper layer absorber 30 in a regular oblique grid pattern, and the lower squeezing line 41 is square in the lower layer absorber 40. It is formed in a grid pattern. The regular diagonal grid pattern and the square grid pattern referred to here are basically the same as those described in the first embodiment. However, in the second embodiment, in a state where the upper layer absorber 30 and the lower layer absorber 40 are overlapped, the equilateral grid pattern formed on the upper layer absorber 30 and the square formed on the lower layer absorber 40. The relative positional relationship of the grid pattern is different from that of the first embodiment.

As shown in FIGS. 7 and 8, in the second embodiment, the upper intersection 33 of the upper absorber 30 and the lower intersection 43 of the lower absorber 40 are in a state where the absorbers 30 and 40 are stacked. And overlap. Further, among the plurality of upper intersections 33 in the upper absorber 30, there is one that overlaps the center (diagonal intersection) of the lower non-squeezed region 42 of the lower absorber 40. In particular, in the range where the pattern of the upper squeezing line 31 of the upper layer absorber 30 and the pattern of the lower squeezing line 41 of the lower layer absorber 40 overlap, the upper intersection 33 is within the range of all the lower non-squeezed regions 42. Will exist. Therefore, in the second embodiment, it can be seen that the upper squeezing line 31 overlaps the position corresponding to the diagonal line of the lower non-squeezing region 42 forming a square shape. Further, in the second embodiment, it can be seen that the lower squeezing line 41 overlaps within the range of the upper non-squeezing region 32.

As described above, in the second embodiment, the lower squeezing line 41 overlaps within the range of the upper non-squeezing region 32, and the upper squeezing line 31 and the upper intersection 33 overlap with each other within the range of the lower non-squeezing region 42. Moreover, the upper intersection 33 and the lower intersection 43 overlap each other. Therefore, the body fluid diffused along the upper pressing line 31 of the upper layer absorber 30 falls on the lower layer absorber 40 and is absorbed by the lower unsqueezed region 42. Further, the body fluid accumulated in the upper intersection 33 of the upper absorber 30 falls on the lower absorber 40 and diffuses along the lower squeeze line 41 through the lower intersection 43. Further, the body fluid diffused along the lower pressing line 41 of the lower layer absorber 40 is absorbed by the upper non-squeezed region 32 of the upper layer absorber 30. Further, the lower squeezing line 41 can also diffuse the body fluid in the diagonal direction of the grid pattern of the upper squeezing line 31. As a result, by forming such a pattern, it becomes possible to quickly guide the body fluid to the non-squeezed regions 32 and 42, which were conventionally considered to have a slow absorption time.

As described above, it can be said that the pattern of the second embodiment has a faster absorption rate of body fluid than the pattern of the first embodiment. On the other hand, it can be said that the pattern of the first embodiment has a wider diffusion range of body fluid than the pattern of the second embodiment. Whether to adopt the pattern of the first embodiment or the pattern of the second embodiment may be appropriately determined in consideration of the performance required for the absorbent article.

The width of each of the squeezed lines 31 and 41, the length D1 of the diagonal line in the longitudinal direction of the upper non-squeezed region 32, the length D2 of the diagonal line in the width direction, or the length L of the lower non-squeezed region 42 in the longitudinal direction. The value of the width B is preferably in the same range as that of the first embodiment described above.

[3. Third Embodiment]
Subsequently, the absorbent article according to the third embodiment of the present invention will be described with reference to FIGS. 9 to 10. 9 (a) and 9 (b) show the upper layer absorber 30 and the lower layer absorber 40 separately, and FIGS. 9 (c) and 9 (d) show the cross-sectional shape in IX-IX. .. FIG. 10 (a) shows a state in which the upper layer absorber 30 and the lower layer absorber 40 are overlapped, and FIG. 10 (b) shows the cross-sectional shape in XX. 9 and 10 conceptually show only the upper layer absorber 30 and the lower layer absorber 40 extracted. Although not shown, the third embodiment described here also includes at least a top sheet 10 and a back sheet 20 as in the first embodiment described above, and further includes a pair of three-dimensional gathers 50 and a pair of three-dimensional gathers 50. A cover sheet 60 may be provided.

In the third embodiment, the upper layer absorber 30 is formed with a plurality of upper pressing lines 31 extending in the longitudinal direction. In the illustrated example, the upper layer absorber 30 has a central squeeze line 31a located in the center in the width direction, a left squeeze line 31b located on the left side, and a right squeeze line 31c located on the right side. The squeezing lines 31a, 31b, and 31c extend from the front body of the upper layer absorber 30 to the back view through the inseam. The central pressing line 31a is formed in a straight line as a whole along the longitudinal direction. On the other hand, the left squeezing line 31b and the right squeezing line 31c are a linear front straight portion 36a located at the end on the front body 1 side and a linear rear side located at the rear end, respectively. The straight portion 36b and the lower crotch 3 are divided into a front straight portion 36a and a linear inseam straight portion 36c located inside the rear straight portion 36b in the width direction. Further, the left squeezing line 31b and the right squeezing line 31c connect the front inclined portion 36d obliquely inclined so as to connect the front straight portion 36a and the inseam straight portion 36c, and the rear straight portion 36b and the inseam straight portion 36c, respectively. It has a rear inclined portion 36e that is inclined obliquely as described above. As a result, the distance between the central squeezing line 31a and the left and right squeezing lines 31b and 31c is relatively large on the front body side and the rear view side, and relatively close to the inseam. Since the inseam of the upper layer absorber 30 is a part that easily comes into contact with the body fluid excreted from the inseam of the wearer, it is easy to diffuse the body fluid in the longitudinal direction by reducing the interval of the squeezing lines 31 at this part. Become. In the present embodiment, the upper layer absorber 30 is not formed with a squeeze line extending in the width direction. Therefore, the upper layer absorber 30 does not have an intersection of squeezing lines.

On the other hand, the lower layer absorber 40 is formed with a plurality of lower pressing lines 41 extending in the width direction. In the illustrated example, in the lower layer absorber 40, linear lower pressing lines 41 extending along the width direction are arranged at regular intervals in the longitudinal direction from the front body to the rear view. In the present embodiment, the lower layer absorber 40 is not formed with a squeeze line extending in the longitudinal direction. Therefore, the lower layer absorber 40 does not have an intersection of squeezing lines.

When the upper layer absorber 30 and the lower layer absorber 40 are overlapped in the thickness direction, as shown in FIG. 10, the upper squeezing line 31 of the upper layer absorber 30 and the lower squeezing line 41 of the lower layer absorber 40 intersect. .. In this way, by crossing the plurality of upper squeezing lines 31 extending in the longitudinal direction and the squeezing lines of the other absorber extending in the width direction, the body fluid is diffused in the longitudinal direction and at the same time in the width direction. Is possible. In particular, body fluids are difficult to diffuse in the longitudinal direction, and body fluids tend to leak from the edges in the width direction. Therefore, the upper squeezing line 31 extending in the longitudinal direction is formed in the upper layer absorber 30, and the lower squeezing line 41 extending in the width direction is formed in the lower absorber 40. As a result, the body fluid that first comes into contact with the upper layer absorber 30 can be diffused in the longitudinal direction, and then the body fluid that has penetrated into the lower layer absorber 40 can be diffused in the width direction as an auxiliary. As a result, the body fluid can be efficiently diffused in the longitudinal direction, and at the same time, leakage from the end portion in the width direction can be prevented.

[4. Example of cross-sectional shape of absorber]
In the first, second, and third embodiments described above, examples of forming the squeezed lines 31 and 41 in which the skin-facing surfaces of the upper layer absorber 30 and the lower layer absorber 40 are recessed have been described. However, the present invention is not limited to this. Hereinafter, another example of the cross-sectional shape of each absorber will be described.

FIG. 11 shows an example of the cross-sectional shape of the upper layer absorber 30 and the lower layer absorber 40. In the example shown in FIG. 11A, the squeezing line 31 of the upper layer absorber 30 is recessed on the skin non-opposing surface side, and the squeezing line 41 of the lower layer absorber 40 is the skin facing surface. The side is recessed. Therefore, the upper layer absorber 30 and the lower layer absorber 40 have squeezing lines 31 and 41 formed on the surfaces facing each other. By doing so, a gap is generated between the upper layer absorber 30 and the lower layer absorber 40 at the site where the squeezing lines 31 and 41 are formed. As a result, the body fluid that has flowed down from the upper layer absorber 30 to the lower layer absorber 40 diffuses over a wide range of the lower layer absorber 40.

In the example shown in FIG. 11B, the squeezing line 31 of the upper layer absorber 30 is formed by denting both the skin facing surface side and the skin non-facing surface side, and squeezing the lower layer absorber 40. The line 41 is recessed only on the side facing the skin. By denting both the skin facing surface side and the skin non-facing surface side of the upper layer absorber 30 in this way, the upper layer absorber 30 and the lower layer absorption are maintained while maintaining the diffusivity of the body fluid on the surface of the upper layer absorber 30. More gaps between the bodies 40 can be secured. Therefore, the body fluid can be diffused over a wide range of both the upper layer absorber 30 and the lower layer absorber 40.

In the example shown in FIG. 11 (c), the squeezing line 31 of the upper layer absorber 30 is formed by denting both the skin facing surface side and the skin non-facing surface side, and the lower layer absorber 40. The squeezing line 41 is also recessed on both the skin facing surface side and the skin non-facing surface side. As a result, as in the example shown in FIG. 11B, a larger gap between the upper layer absorber 30 and the lower layer absorber 40 is secured while maintaining the diffusibility of the body fluid on the surface of the upper layer absorber 30. it can. Further, by denting both the skin facing surface side and the skin non-facing surface side of the lower layer absorber 40, the diffusivity on the surface of the lower layer absorber 40 is maintained, and the body fluid is further formed on the back surface side of the lower layer absorber 40. Can be efficiently permeated. That is, the back sheet 20 (see FIG. 2) is arranged on the back surface side of the lower layer absorber 40. Then, by providing a gap between the lower layer absorber 40 and the back sheet 20, the body fluid that has reached the back sheet 20 is further diffused through the squeezing line 41 of the lower layer absorber 40 and absorbed on the back surface side of the lower layer absorber 40. Will be done. As a result, the body fluid can be absorbed by the entire upper layer absorber 30 and the lower layer absorber 40.

In the example shown in FIG. 11D, the squeezing line 31 of the upper layer absorber 30 is recessed on the skin facing surface side, and the squeezing line 41 of the lower layer absorber 40 is the skin non-facing surface. The side is recessed. Therefore, the upper layer absorber 30 and the lower layer absorber 40 are joined to each other with almost no gap. In this way, it is also possible to join the upper layer absorber 30 and the lower layer absorber 40 so as not to form a gap.

FIG. 12 shows an example of an absorbent article further comprising an additional absorber 70 (third absorber) in addition to the upper absorber 30 and the lower absorber 40. In the example of FIG. 12, the additional absorber 70 is arranged on the skin-facing surface side of the upper layer absorber 30, that is, between the upper layer absorber 30 and the top sheet 10 (see FIG. 2). However, the additional absorber 70 can also be arranged on the skin non-opposing surface side of the lower layer absorber 40, that is, between the lower layer absorber 40 and the back sheet 20 (see FIG. 2). The additional absorber 70 preferably has a plurality of squeezing lines 71, similarly to the upper layer absorber 30 and the lower layer absorber 40. As shown in FIG. 12, the squeezing line 71 may be a recessed side of the additional absorber 70 on the skin facing surface side, or a recessed side of the additional absorber 70 on the skin non-facing surface side. There may be. The pattern of the squeeze line 71 of the additional absorber 70 is not particularly limited, but the squeeze line pattern described in the first, second, and third embodiments can be appropriately applied. Although not shown, it is possible to superimpose one or more absorbers in addition to the additional absorber 70.

As described above, in the specification of the present application, in order to express the content of the present invention, the embodiments of the present invention have been described with reference to the drawings. However, the present invention is not limited to the above-described embodiment, and includes modifications and improvements which are obvious to those skilled in the art based on the matters described in the present specification.

For example, combining the squeezing lines forming the grid pattern described in the first embodiment and the second embodiment with the squeezing lines extending in one direction in the longitudinal direction or the width direction described in the third embodiment. Is also possible. That is, one of the two laminated absorbers has a plurality of unsqueezed regions surrounded by a squeeze line, and the other absorber extends in the longitudinal direction or the width direction. It can also have a plurality of squeeze lines. For example, a plurality of squeezing lines extending along the width direction shown in FIG. 9B are formed on the upper layer absorber 30 in the square lattice pattern shown in FIG. 3A. And vice versa. Further, for example, a plurality of squeezing lines extending along the longitudinal direction shown in FIG. 9A are formed on the upper layer absorber 30, and a rhombic lattice shape shown in FIG. 3B is formed on the lower layer absorber 40. It is possible to form a squeeze line of, and vice versa.

In the present specification, the case where the absorbent article according to the present invention is a urine absorbing pad has been described as an example, but the present invention is not limited to this, and the present invention is not limited to this, and a pants-type disposable diaper or a tape-type disposable diaper or a tape-type disposable diaper is used. It can also be applied to diapers or sanitary napkins.

The present invention relates to absorbent articles such as urine absorbing pads and disposable diapers. Therefore, the present invention can be suitably used in the manufacturing industry of absorbent articles and the like.

10 ... Top sheet 20 ... Back sheet 30 ... Upper layer absorber (first absorber) 31 ... Upper pressing line 32 ... Upper non-squeezed area 33 ... Upper intersection 34 ... Absorbent material 35 ... Core wrap sheet 36a ... Front straight line Part 36b ... Rear straight part 36c ... Inseam straight part 36d ... Front inclined part 36e ... Rear inclined part 40 ... Lower layer absorber (second absorber)
41 ... Lower compression line 42 ... Lower non-squeezed area 43 ... Lower intersection 44 ... Absorbent material 45 ... Core wrap sheet 50 ... Three-dimensional gather 51 ... Side sheet 52 ... Elastic elastic member 60 ... Cover sheet 70 ... Additional absorption Body (third absorber)
71 ... Squeezing line 100 ... Absorbent article

Claims (8)

Liquid permeable top sheet (10), back sheet (20), and at least two absorbers (30, 40) stacked and arranged between the top sheet (10) and the back sheet (20). It is an absorbent article with and
Each of the two absorbers (30, 40) has a plurality of squeezing lines (31, 41) in which the skin-facing surface side of the absorber is recessed in the thickness direction.
Of the two absorbers (30, 40), the squeeze line (31) of the upper layer absorber (30) located on the top sheet (10) side extends in the longitudinal direction of the absorbent article. Yes,
Of the two absorbers (30, 40), the squeeze line (41) of the lower layer absorber (40) located on the back sheet (20) side extends in the width direction of the absorbent article. Yes,
At least one of the squeezing lines (31) of the upper layer absorber (30) includes a straight portion extending linearly along the longitudinal direction and an inclined portion obliquely inclined from the end portion of the straight portion. Have at least
An absorbent article in which the joint portion of the straight portion and the inclined portion and the squeezing line (41) of the lower layer absorber (40) overlap when viewed from a plane direction . A plurality of the squeezing lines (31) of the upper layer absorber (30) are provided, and each extends from the inseam of the absorber to the front body and / or the back body, and is separated from each other. The absorbent article according to claim 1. The first aspect of the present invention, wherein any one of the ends of the squeeze line (31) of the upper layer absorber (30) overlaps the squeeze line (41) of the lower layer absorber (40) when viewed from a plane direction. Absorbent article. Liquid permeable top sheet (10), back sheet (20), and at least two absorbers (30, 40) stacked and arranged between the top sheet (10) and the back sheet (20). It is an absorbent article with and
Each of the two absorbers (30, 40) has a plurality of squeezing lines (31, 41) in which the absorber is recessed in the thickness direction.
The squeezed lines of one of the absorbers are formed in a grid pattern.
The squeeze line of the other absorber comprises a squeeze line extending in the width direction of the absorbent article.
The squeeze lines of the two absorbers intersect at least partially when viewed from the plane .
The squeeze line of the other absorber is a recess on the skin-facing surface side of the absorber in the thickness direction.
The other absorber is located on the top sheet (10) side, and the one absorber is located on the back sheet (20) side.
An absorbent article in which the region in which the squeeze line is formed in the other absorber is formed narrower in the width direction than the region in which the squeeze line is formed in the one absorber. The width of the other of said absorber, said than one said compression line is formed regions in the absorbent body of the absorbent article according to claim 4, which is narrower in the width direction. Liquid permeable top sheet (10), back sheet (20), and at least two absorbers (30, 40) stacked and arranged between the top sheet (10) and the back sheet (20). It is an absorbent article with and
Each of the two absorbers (30, 40) has a plurality of squeezing lines (31, 41) in which the absorber is recessed in the thickness direction.
The squeeze line of one of the absorbers is a rhombic lattice in which a plurality of squeeze lines extending in a direction inclined with respect to the longitudinal direction and the width direction of the absorbent article intersect to partition a diagonal non-squeeze region. It is formed in a pattern of the shape
On the other hand, the squeezed line of the absorber is a square in which a plurality of squeezed lines extending parallel to the longitudinal direction and a plurality of squeezed lines extending parallel to the width direction intersect to form a rectangular non-squeezed region. It is formed in a grid pattern and
One of the absorbers has a plurality of intersections where the squeezing lines intersect.
A plurality of squeezing lines extending parallel to the longitudinal direction of the other absorber are absorbent articles that overlap with the intersection when viewed from the plane direction. The grid-like pattern is a diagonal grid-like pattern in which a plurality of squeezing lines extending in a direction inclined with respect to the longitudinal direction and the width direction of the absorbent article intersect to partition an oblique non-squeezed region. The absorbent article according to claim 4. The absorbent article according to claim 1, wherein the squeeze line of the one absorber and the squeeze line of the other absorber have substantially the same width and depth.

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