TW201705928A - Absorbent article - Google Patents

Abstract

Provided is an absorbent article that has improved ability to diffuse a liquid on an absorbent body while preventing twisting and deformation of the absorbent body. This absorbent article (10) is provided with a liquid-permeable surface sheet (14); a liquid-impermeable back sheet (12); and an elongate absorbent body (13) disposed between the surface sheet (14) and the back sheet (12). The absorbent article (10) is characterized in that: the absorbent body (13) has a plurality of compressed depressions (502) on the surface sheet (14) side; the plurality of compressed depressions (502) form a pair of first patterns (501a) extending in a first direction along both lateral side edges of the absorbent body (13), second patterns (501b) positioned between the pair of first patterns (501a) and extending in a second direction that is different from the first direction, and third patterns (501c) extending in a third direction and intersecting the second patterns (501b); and the second patterns and third patterns are formed at least in a central region of the absorbent body (13).

Description

Absorbent article

The present invention relates to an absorbent article.

In recent years, there has been an increasing demand for absorbent articles such as superabsorbent polymers (hereinafter referred to as "SAP") or non-woven fabrics, disposable diapers, and the like.

In the absorbent articles such as disposable diapers, various improvements have been made to improve the function and wearing feeling. In particular, in order to improve the diffusibility and absorbability of liquids such as urine, various methods have been proposed for performing various shapes on the surface of an absorbent body used for an absorbent article.

For example, Patent Document 1 proposes an absorbent body that divides the elongated absorbent body into the abdomen in the longitudinal direction so as not to cause leakage of liquid or the like during walking or sitting. The lower part of the lower part and the back part are provided with two recesses along the longitudinal direction in the lower part of the crotch. The absorbent body described in Patent Document 1 is configured such that the side edge portion is easily adapted to the squirrel portion to prevent side leakage of the body fluid.

Further, Patent Document 1 proposes an absorbent body having a concave portion recessed in a groove shape, and a concave portion at the lower portion of the lower side of the absorbent body, a concave portion of the abdomen and the back, respectively, with respect to the concave portion The long side direction is arranged in the oblique direction. According to the above configuration, the absorbent body described in Patent Document 1 is configured to be excellent in diffusibility of liquid in the abdomen and the back.

[Previous Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open Publication No. 2012-143535

However, even if it is suitable for the lower part of the crotch when worn, there is still a case where the absorbent body is deformed due to the long-term movement of the foot, and the fit at the time of wearing cannot be maintained. As a result, there is a deformation or breakage of the absorber due to deformation of the absorber, so that the liquid received by the absorber of the lower part of the crotch is not easily diffused toward other portions, and a gap is formed between the wearer and the underarm. The problem of leakage of body fluids in the lower part of the sputum.

The present invention has been made in view of such a problem, and an object thereof is to provide an absorbent article which can suppress the twisting or deformation of the absorbent body and can improve the diffusibility of the liquid on the absorbent body.

In order to achieve the object, the absorbent article of the present invention comprises a liquid permeable surface sheet, a non-liquid permeable back sheet, and an elongated absorbent body disposed between the surface sheet and the back sheet, characterized in that the absorption system The surface on the surface sheet side has a plurality of compressed concave portions, and the plurality of compressed concave portions are formed to extend in the first direction along the two side edges of the absorbent body in the width direction, to the first pattern, and to the first pair. a second pattern extending between the patterns in a second direction different from the first direction and a third pattern extending in a third direction intersecting the second pattern, and the second pattern and the third pattern are formed at least in absorption The central area of the body.

As described above, according to the present invention, it is possible to provide an absorbent article which can suppress the twisting or deformation of the absorbent body and can improve the diffusibility of the liquid on the absorbent body.

10‧‧‧Disposable diapers

10F‧‧‧Previous area

10R‧‧‧胴胴 area

10C‧‧‧胯下区域区

10J‧‧‧Closed Department

10L‧‧‧ openings around the legs

10W‧‧‧ Waist opening

11‧‧‧ Cover Sheet

11A‧‧‧Gap section

12‧‧‧ Back sheet (back sheet)

13‧‧‧Acceptor

14‧‧‧Top film (surface sheet)

15‧‧ ‧ core wrap

16‧‧‧Glue line

17‧‧‧Glue line

18‧‧‧ side film

19‧‧‧Glue line

401‧‧‧ recess

402‧‧‧ slots

403‧‧‧ Shaped deformation suppression department

404‧‧‧ contour

501‧‧‧ slot

501a‧‧‧1st slot

501b‧‧‧2nd slot

501c‧‧‧3rd slot

502‧‧‧ recess

601‧‧‧ contour

701‧‧‧ gap

801‧‧‧ slot

801a‧‧‧1st slot

801b‧‧‧2nd slot

801c‧‧‧3rd slot

801d‧‧‧4th slot

802‧‧‧ recess

L1‧‧‧ interval

L2‧‧‧ length

L3‧‧‧Width

M1‧‧‧Previous part

M2‧‧‧胯下下

M3‧‧‧ later part

N1‧‧‧ trough formation area

N2‧‧‧ non-grooved formation area

P‧‧‧ imaginary line

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing the appearance of a disposable diaper of a pull-on type using an absorbent article according to an embodiment of the present invention.

Fig. 2 is a development view of a disposable diaper for a pant type according to an embodiment of the present invention.

Fig. 3 is a perspective view showing the disposable diaper after being used in an embodiment of the present invention in an exploded state.

Figure 4 is a cross-sectional view showing a disposable diaper according to an embodiment of the present invention.

Fig. 5 is a view showing an absorbent body of a disposable diaper according to an embodiment of the present invention.

Fig. 6 is a partial cross-sectional view showing the absorbent body of the disposable diaper according to the embodiment of the present invention.

Fig. 7 is an enlarged view showing a groove portion of an absorbent body according to an embodiment of the present invention.

Fig. 8 is a view showing an absorbent body of a disposable diaper according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the invention is not limited to such embodiments, but also includes other absorbent articles that are attributable to the concepts of the invention.

[Embodiment 1]

First, the overall shape of the disposable diaper of the underpants type to which the absorbent article according to the first embodiment of the present invention is applied will be described with reference to Figs. 1 to 4 .

Fig. 1 is a perspective view showing the appearance of a disposable diaper for a pull-on type of the absorbent article of the present embodiment as viewed from the front side. Fig. 2 is a development view of the disposable diaper of the underpants type of the present embodiment.

The pull-on disposable diaper 10 of the present embodiment has a front crotch region 10F, a crotch region 10R, and a crotch region 10C connecting the front crotch region 10F and the crotch region 10R. Further, a waist opening portion 10W is formed which surrounds the waist portion of the wearer in the front crotch region 10F and the crotch region 10R when worn. Similarly, a left and right pair of leg peripheral opening portions 10L are formed, and the lower end portion 10F and the lower crotch region 10R end portion and the crotch region 10C surround the inner side of the legs of the wearer's legs to the area around the thighs. Either.

When the disposable diaper 10 is worn, the front crotch region 10F is located on the ventral side of the user, and the crotch region 10R is located on the back side of the user. Further, the crotch region 10C covers the underarm of the wearer, and the left and right pair of leg portions around the leg portion 10L are configured to be able to pass through the wearer's foot.

The disposable diaper 10 is provided with a cover sheet 11 which covers the front crotch region 10F and the crotch region 10R together with the crotch region 10C, and the left and right end edges of the cover sheet 11 are They are joined to each other to form a closed portion 10J. Thereby, the waist opening portion 10W and the left and right pair of leg portion opening portions 10L are defined.

In the disposable diaper 10 of the present embodiment, in the center of the width direction of the disposable diaper 10 or in the vicinity thereof, assuming one from the ventral side to the back side An imaginary line P extending through the crotch region 10C. Specifically, for example, when the waist side of the disposable diaper 10 is set to the upper side and the lower side is set to the lower side, the imaginary line P is applied to the ventral surface of the disposable diaper 10 and After extending in the up-and-down direction and passing through the crotch region 10C, the back surface also extends in the vertical direction along the surface of the diaper 10.

As shown in FIG. 2, a pair of notched portions 11A formed in a semicircular arc shape are formed in the center of the left and right side edge portions in the longitudinal direction of the cover sheet 11, and the pair of notched portions 11A are used as the legs of FIG. The peripheral opening portion 10L. An absorber 13 is disposed on a surface of the cover sheet 11 that is in contact with the skin of the wearer. The absorber 13 is set in an elongated rectangular shape and spans over the front crotch region 10F, the crotch region 10C, and the crotch region 10R. overall. In order to maintain its shape, the absorbent body 13 is covered, for example, by a core covering 15 (cotton paper) whose ends are adhesively bonded to each other. The core is coated with 15 sheets of hydrophilic sheets. The absorber 13 covered with the core cover 15 is joined to the back sheet 12. The back sheet 12 joined to the absorber 13 covered with the core cover 15 has a longitudinal direction which is substantially parallel to the imaginary line P, and the center of the width direction or the vicinity thereof is passed through the imaginary line P. The position is bonded to the cover sheet 11. The topsheet 14 having a liquid permeable property in contact with the skin of the wearer is joined to the surface of the absorbent body 13 coated with the core cover 15.

On the cover sheet 11, the glue line 16 for forming the pleats around the legs and the glue line 17 for forming the pleats around the waist are respectively joined in an extended state.

Further, a pair of side panels 18 forming a three-dimensional pleat are provided on the left and right side edges of the top sheet 14. The pair of side panels 18 are formed such that the outer end edge portion is formed in the same shape as the one of the cover sheets 11 to the notch portion 11A, and stands on both side edges of the absorbent body 13 when worn to prevent the wearer from being discharged. The component of the side leakage of urine. Each of the side panels 18 is disposed in a form in which the inner end edge portion is folded toward the absorber 13 side and held. The glue line 19, which is a three-dimensional pleated stretch material, stands when the glue line 19 contracts, toward the skin contact of the wearer. The three-dimensional pleats can be of a known composition used in conventional disposable diapers. For example, it can be formed by sandwiching and fixing a three-dimensional pleated stretch material in an extended state between layers of a water-resistant sheet.

Fig. 3 is a perspective view showing an exploded state in which the disposable diaper 10 of the present embodiment is cut and developed. The laminated structure of the disposable diaper 10 will be described with reference to Fig. 3 .

As shown in Fig. 3, the disposable diaper 10 is sequentially overlapped and joined with the cover sheet 11, the non-liquid-permeable back sheet 12, the absorbent body 13, and the top from the outermost side as viewed from the skin side of the wearer. Sheet 14. Further, the back sheet 12, the absorbent body 13 covered with the core cover 15, and the top sheet 14 may be joined to the undergarment or the like to form a liquid-absorbent absorbent article.

The cover sheet 11 is formed with a pair of notch portions 11A formed on both side edges and joined to the back sheet 12.

The absorbent body 13 is covered with a core sheet 15 (cotton paper) which is a hydrophilic sheet, and is sandwiched between the back sheet 12 and the top sheet 14 by a core covering 15 coated absorbent body 13. The topsheet 14 is joined to the backsheet 12 via an absorbent body 13 coated with a core cover 15. Further, in the present embodiment, the absorbent body 13 coated with the core coating 15 is used, but the absorbent body of the present invention may not be coated with the core.

In order to obtain a good hand touch, the cover sheet 11 is composed of a thin nonwoven fabric. Further, the glue sheets 16 and 17 are joined in an extended state at a position adjacent to the pair of notch portions 11A and at both end portions of the cover sheet 11 of the cover sheet 11. Further, a pair of side panels 18 forming a three-dimensional pleat are provided on the left and right side edges of the top sheet 14 in the width direction. The pair of side panels 18 form the outer end edge portion to be in contact with one of the cover sheets 11 The member having the same shape of the mouth portion 11A and standing along both side edges of the absorbent body 13 at the time of wearing to prevent side leakage of urine excreted by the wearer. In each of the side panels 18, a rubber thread 19 as a three-dimensional pleated stretch material is disposed so as to be folded by the inner end edge portion toward the absorber 13 side.

Fig. 4 is a cross-sectional view showing the disposable diaper 10 of the present embodiment cut along the line IV-IV of Fig. 2; The cross-sectional shape of the absorbent body 13 of the disposable diaper 10 will be described with reference to Fig. 4 .

The absorber 13 and the topsheet 14 covered with the core cover 15 are compressed on the surface of the top sheet 14 by intermittent embossing, and these are integrally formed to form a plurality of concave portions 401 having a quadrangular shape. The plurality of concave portions 401 are arranged at intervals, thereby forming a groove 402 through which liquid such as urine passes. The groove 402 has a depth from the surface of the top sheet 14 side of the absorber 13 covered with the core cover 15 toward the back sheet 12 side. The portion surrounded by the groove 402 is referred to as a shape deformation suppressing portion 403 which is formed on the surface of the absorber 13 covered with the core cover 15. The details of the fixed deformation suppression unit 403 will be described later. Further, the ridge line at the upper portion of the concave portion 401 shows a contour line 404 which is not visible in the portion of the groove 402 when it is cut in the cross section.

Next, the absorbent body 13 of the disposable diaper 10 of the present embodiment will be described with reference to Figs. 5 and 6 . Fig. 5 is a plan view showing the upper surface of the absorber 13 of the disposable diaper 10 of the present embodiment as a top surface. The surface shape of the absorber 13 will be described with reference to Fig. 5 .

The absorbent body 13 mainly contains pulp and SAP. The absorber 13 is set in an elongated rectangular shape and spans over the entire front crotch region 10F, the crotch region 10C, and the crotch region 10R. The absorber 13 is divided into a front sill portion M1, a crotch portion M2, and a sill portion M3 in the longitudinal direction. Furthermore, it can also be used to surround the wearer. The left and right pair of leg portions around the thigh portion have a size of a pair of leg portions 10L, and a pair of notched portions formed in an arc shape are formed in the crotch portion M2. The absorber 13 sets the direction from the crotch portion M2 toward the front crotch portion M1 to the front (upper) direction, and the direction from the crotch portion M2 toward the crotch portion M3 as the rear (lower) direction, and The direction orthogonal to the direction (longitudinal direction) is set to the left-right direction (width direction). Further, the absorber 13 is rectangular, but the shape of the absorber of the present invention is not limited thereto. For example, the shape of the absorber includes a shape in which the corners of the front and rear (upper and lower) ends are rounded, an ellipse extending toward the front and rear (up and down), a round, and a rectangle having the same length in the front and rear (up and down). shape.

Further, a groove 501 extending in a diagonal shape is formed in the absorber 13. In the present embodiment, the groove 501 is formed to extend discontinuously from one end of the groove forming region N1 toward the other end. The groove 501 of the present embodiment is formed integrally with the top sheet 14 and the core cover 15 to form a plurality of compressed concave portions 502 having a rectangular shape on the surface of the absorbent body 13, and the plurality of compressed concave portions 502 are separated. The openings are arranged to form. Further, the grooves 501 may be intermittent according to the interval and depth of the concave portions 502, or may be continuous, or may be mixed.

As shown in Fig. 5, in the present embodiment, the groove 501 is formed by arranging the first, second, and third patterns of the plurality of compressed concave portions 502 at predetermined intervals in the groove forming region N1 on the surface of the absorber 13.

The plurality of compressed concave portions 502 are formed on both side edges in the width direction (left-right direction) of the absorber 13 orthogonal to the longitudinal direction of the absorber 13 (the direction in which the imaginary line P extends), and are formed in the first direction. One of the longitudinal direction of the absorber 13 extends to the first groove (first pattern) 501a. Further, a plurality of the compressed concave portions 502 are formed from the upper side of one side of the imaginary line P located at the center of the width direction of the absorbent body 13 toward the lower side of the other side (the upper side of the paper in FIG. 5 is viewed from the upper right side to the lower left side). Side) the second direction of the oblique extension A plurality of second grooves (second patterns) 501b. Further, the plurality of compressed concave portions 502 are formed by a plurality of third directions from the upper side of the imaginary line P toward the lower side (the upper left side toward the lower right side viewed from the paper surface in FIG. 5). The third groove (third pattern) 501c. The plurality of second grooves 501b and the plurality of third grooves 501c are connected to the pair of first grooves 501a at both ends. In this way, the first groove 501a is formed by being connected to the second groove 501b and the plurality of third grooves 501c by extending along both side edges in the width direction of the absorber 13 and in the longitudinal direction of the absorber 13. The liquid existing in the crotch portion M2 can be diffused toward the front crotch portion M1 and the crotch portion M3.

In Fig. 5, the pair of first grooves 501a are arranged in parallel with each other. Further, the plurality of second grooves 501b are arranged in parallel with each other and at predetermined intervals. Similarly, the plurality of third grooves 501c are arranged in parallel with each other and at predetermined intervals. However, the first groove 501a to the third groove 501c may not be completely parallel to each other, and the distance between them may not be constant. Further, the plurality of second grooves 501b are inclined at the same angle with respect to the imaginary line P, but the present invention is not limited thereto, and the inclination angle of each groove may be different. The third groove 501c is also the same.

Further, in the absorber 13, the second groove 501b and the third groove 501c are formed in plural numbers. However, if the second groove 501b and the third groove 501c which are elongated in the oblique direction are formed, the number of the grooves is not limited. However, in the case where one of the second groove 501b and the third groove 501c is formed, it is preferably formed at least in the central portion of the absorber 13. Preferably, the second groove 501b and the third groove 501c intersect each other, but the present invention is not limited thereto, and may include a case where the two do not intersect. The details of the action of the groove will be described later.

Here, the central region of the absorbent body 13 of the present invention refers to a region which is initially in contact with a liquid such as urination and a region in the vicinity thereof. Furthermore, the absorber 13 The central area may vary depending on the physique or gender of the wearer of the absorbent article.

Further, the absorber 13 has a groove forming region N1 which includes a central region of the imaginary line P which is a center line in the width direction of the absorber 13, and which is elongated in a strip shape toward the extending direction of the imaginary line P. . Further, the absorber 13 has a non-groove forming region N2 on both sides of the groove forming region N1.

Fig. 6 is a partial cross-sectional view of the disposable diaper 10 according to the embodiment of the present invention taken along line VI-VI of Fig. 5.

The groove 501 is a member in which a predetermined groove pattern is formed on the surface of the top sheet 14 side of the absorber 13 covered with the core cover 15, and the absorber 13 covered with the core cover 15 is heated according to the case, and The top sheet 14 is formed by being compressed as a unit. Further, the width and depth of each of the grooves 501 may be equal, or may vary depending on the interval between the adjacent grooves, the position of the grooves, and the like. Further, as shown in FIG. 6, the side wall of the groove 501 may be a V-shaped obliquely inclined surface of the self-absorbent body 13, or may be a substantially vertical extension. Further, the ridge line of the upper portion of the concave portion 502 shows the outline 601 which is not visible in the portion of the groove 501 when it is cut in the cross section.

By the above-described compression for forming the groove 501, the portion of the groove 501 of the absorbent body 13 covered with the core cladding 15 and, as the case may be, the other portion thereof are compressed, the density of the absorbent body 13 is increased. . The compression ratio of the portion of the most compressed groove 501 is preferably about 4 times to 7 times, and may include other ranges of compression ratio depending on the material of the absorbent body 13 or the absorbed liquid. Further, the density of the absorber in the portion of the groove 501 to be compressed is twice or more as compared with the uncompressed portion. The density of the absorbent body is mainly the density of the pulp. Since the density of the compressed concave portion 502 is increased, the liquid of the urine or the like flowing through the groove 501 can be sucked by the capillary force of the absorbent body 13.

As described above, the portion of the groove 501 of the absorbent body 13 is the absorbent body 13 Compressed to form. Therefore, in the portion of the groove 501 and, as the case may be, in the vicinity thereof, the absorbent body 13 is compressed and hardened compared to other portions of the absorbent body 13.

Further, the fixed deformation suppressing portion 403 presses the outer periphery of the absorber 13 in the fixed deformation suppressing portion 403 by the groove 501, and thus becomes not easily deformed. Therefore, even if the tensile force is generated in the oblique direction with respect to the longitudinal direction of the absorbent body 13, the absorbent body 13 is less likely to be wrinkled obliquely due to the rigidity of the groove 501, and the fixed deformation suppressing portion 403 is not easily deformed, so that As a result, deformation in the oblique direction can be suppressed. Therefore, the absorbent body 13 is also not greatly twisted due to the movement of the foot before and after the movement to deform the shape. Since the absorbent body 13 does not twist, the fit of the underarm can be maintained, and leakage of body fluid is less likely to occur. Further, it is possible to suppress the breakage of the absorber 13 due to the deformation, so that the absorbability can be maintained.

Further, in the present embodiment, the groove forming region N1 extends from the front portion M1 of the absorber 13 to the rear weir portion M3, but the present invention is not limited thereto. That is, the groove forming region N1 may be formed only in the underarm portion M2. Further, the groove forming region N1 may be formed only in the front weir portion M1 or only in the back weir portion M3, or may not be formed in the longitudinal end portion of the absorber 13. The portion close to the waist is in close contact with the skin by the waist pleats. Therefore, it is assumed that the hard portion of the groove 501 is not brought into contact with the skin to improve the wearing feeling.

The disposable diaper 10 of the present embodiment is constructed by laminating the topsheet 14 on the surface of the absorbent body 13 covered with the core covering 15, and coating the absorbent body 13, the topsheet 14, and the core. 15 is formed by compression as a whole to form the groove 501. That is, the top sheet 14 is firmly fixed in a state of being in close contact with the groove 501. Thus, the top sheet 14 is also compressed together, whereby the top sheet 14 is also formed with the fixed deformation suppressing portion 403, so that the twisting or shifting of the absorber 13 can be suppressed with respect to the movement during walking.

Fig. 7 is an enlarged view showing a portion of the groove 501 on the upper surface of the absorbent body 13 of the present embodiment (the groove 501 of the absorbent body 13 surrounded by a broken line VII in Fig. 5).

The groove 501 can be configured by arranging a plurality of concave portions 502 at intervals L1. The concave portion 502 is, for example, a quadrangular shape, and is formed by compressing the absorbent body 13 with an embossing mold of the same shape. The interval L1 is approximately 2 mm. Further, the length L2 of the concave portion is about 2.4 mm. Further, the width L3 of the concave portion is about 2 mm. Preferably, L1, L2, and L3 are each in the range of 1 mm, L1, 5 mm, 1 mm, L2, 50 mm, and 1 mm, L3, and 5 mm. Further, the recess 502 is a schematic, and the number and size thereof depend on the range.

The recesses 502 are arranged at intervals L1, but the gap 701 between the adjacent recesses 502 is more recessed than the shaped deformation suppressing portion 403 surrounded by the grooves 501. That is, as the compression at the time of forming the concave portion 502, the absorber 13 in the portion of the gap 701 is stretched, so that the concave portion 502 is recessed from the fixed deformation suppressing portion 403. Therefore, there is a height difference between the concave portion 502 and the gap 701, but it is lower than that of the non-compressed portion, and the groove 501 which is lower than the fixed deformation suppression portion 403 is integrally formed.

Preferably, in the groove 501 formed by the intermittent embossing process, the compression ratio is about 4 to 7 times in the portion of the concave portion 502, but is not limited thereto, depending on the material of the absorbent body 13 or The absorbed liquid may also contain other ranges.

Thus, the groove 501 can be constructed by intermittent embossing. Thereby, it is possible to suppress the twisting or deformation of the absorber due to the movement of the foot before and after. In addition, in the case where the embossing of the groove 501 is intermittent, the groove 501 itself is also easily bent, is more suitable for the body, and becomes easy to follow the movement of the body, thereby suppressing the feeling of hardening.

Next, the absorption method of the urine when the disposable diaper 10 of the present embodiment is used to make up the urine will be described with reference to Figs. 5 to 7 .

For example, in the case where the surface of the absorber 13 of the disposable diaper 10 is formed with the grooves 501b and 501c having the oblique shape after the use of the embodiment, the twisting or deformation of the absorber 13 can be suppressed. However, in this case, since the groove parallel to the longitudinal direction of the absorber is not formed, it is considered that urine does not sufficiently diffuse from the central region of the absorber toward the peripheral region. Therefore, since the urine does not diffuse toward the peripheral region of the absorbent body, the absorbent body of the peripheral region cannot be used, so that the absorption rate of urine of the entire absorbent body is lowered. According to such a state of the art, it is considered that there is a problem that the conventional disposable diaper can be used only for the absorption of about 30% of the surface of the absorbent body, which is not only inefficient but also costly.

Therefore, in the disposable diaper 10 after use in the present embodiment, in order to eliminate the above problem, urine is absorbed in the following manner. That is, first, if a large amount of urine flows out toward the central region of the absorbent body 13, a part of urine is absorbed in the central region of the absorbent body 13. While absorbing urine in the central region of the absorbent body 13, the urine is diffused in the left and right ends by the second groove 501b and the third groove 501c having a diagonal shape in the central portion of the absorbent body 13. As an example, in the third groove 501c indicated by the line segment AB located in the crotch portion M2 of the absorber 13 of Fig. 5, the urine in contact with the point C in the line segment AB passes through the third groove 501c to make the urine point A. And the direction of B spread.

Then, the urine reaches the left and right ends, and flows into the first groove 501a that intersects the second groove 501b and the third groove 501c, and is diffused by the first groove 501a toward the front portion M1 and the rear portion M3. As a result, a larger amount of urine can be diffused toward the peripheral region of the absorber 13, and the balance between the amount of absorption in the central region of the absorber and the amount of absorption in the peripheral region can be obtained.

In this way, the first groove 501a extending in the longitudinal direction of the absorber 13 and the oblique groove communicating with the first groove 501a are formed on both side edges in the width direction of the absorber 13 by the surface of the absorber 13. In the second groove 501b and the third groove 501c, the twisting or deformation of the absorber 13 can be suppressed, and a larger amount of urine can be diffused toward the peripheral region of the absorber 13. In the present embodiment, the central region of the absorbent body 13 refers to the crotch portion M2 located in the crotch region 10C at the time of wearing, and is located in the width direction of the absorbent body 13 in the longitudinal direction of the absorbent body 13. The groove forming region N1 parallel to the center line of the longitudinal direction, that is, the imaginary line P is not limited to this region.

Thereby, the diffusibility of the urine of the disposable diaper 10 can be improved, and as the entire absorbent body 13, the absorption efficiency of urine and the utilization rate of the absorbent body can be improved. Also, theoretically, nearly 100% of the surface of the absorber 13 can be used. Further, since the groove 501 has a shape of a diagonal lattice, the traceability of the wearer can be improved, and the wearing comfort and the skin feel can be improved. Further, in the present embodiment, the plurality of concave portions 502 are intermittently arranged to form the grooves 501, but one of the grooves 501 may be formed by one continuous continuous concave portion.

[Embodiment 2]

Fig. 8 is a plan view showing the upper surface of the absorber 13 of the disposable diaper 10 of the second embodiment of the present invention as the upper surface. The difference between the shape of the absorber 13 of the present embodiment and the shape of the absorber 13 of the first embodiment lies in that the groove 801 on the surface of the absorber 13 is formed by a point in which the concave portion is continuously connected, and one of the longitudinal direction is extended. The two ends of the first groove 801a are respectively connected by the recesses that are continuously connected.

As shown in Fig. 8, on the surface of the absorber 13, a pair of first grooves (first pattern) extending in the longitudinal direction of the absorber 13 in the first direction are formed along both side edges in the width direction of the absorber 13. ) 801a. In addition, on the surface of the absorber 13, In the same manner as in the first embodiment, a plurality of second grooves (second patterns) 801b in the second direction and a plurality of third grooves (third patterns) 801c in the third direction are formed. Further, one end of the pair of first grooves 801a is formed on the surface of the absorber 13, and one of the fourth grooves (fourth pattern) extending in the fourth direction, that is, both end portions in the longitudinal direction of the absorber 13 is formed. ) 801d. In the present embodiment, one groove 801 is formed by one continuous continuous concave portion 802.

In the present embodiment, as in the first embodiment, as an example, the third groove 801c indicated by the line segment AB located in the crotch portion M2 of the absorber 13 of Fig. 8 is in contact with the urine at the point C in the line segment AB. The urine is diffused in the direction of the point A and the point B by the third groove 801c.

Then, the urine reaches the left and right ends, and flows into the first groove 801a that intersects with the second groove 801b and the third groove 801c, and is diffused by the first groove 801a toward the front portion M1 and the rear portion M3. As a result, a larger amount of urine can be diffused toward the peripheral region of the absorber 13, and the balance between the amount of absorption in the central region of the absorber and the amount of absorption in the peripheral region can be obtained.

Further, in the present embodiment, by forming the grooves 801 surrounding the peripheral region of the absorber 13 by connecting the respective ends of the pair of first grooves 801a and the pair of fourth grooves 801d, in addition to the effects of the first embodiment, The urine which diffuses the central region of the self-absorber 13 toward both end portions can be further diffused and absorbed by the dam portion M1 and the breech portion M3 before the peripheral region. Thereby, as the entire absorbent body 13, the absorption efficiency of urine and the utilization rate of the absorber can be improved. Further, the shape of the groove 801 is not limited to the shape of the embodiment, and the central region may be formed as a continuous line and the peripheral region may be formed in an intermittent shape. Further, a plurality of concave portions 802 may be arranged intermittently to form the grooves 801.

The concave portion formed on the surface of the absorbent body of the present invention can set the width of the cross section perpendicular to the extending direction of the concave portion located in the central portion to be perpendicular to the position in the circumference. The width of the cross section of the recessed portion of the side region is wide. Further, the concave portion formed on the surface of the absorbent body of the present invention can set the depth of the concave portion located in the central portion to be deeper than the depth of the concave portion located in the peripheral portion. Thereby, more of the central region of the urine self-absorbent body can be diffused toward the peripheral region and absorbed therein. Further, the change in the width and/or the depth of the concave portion may be a step type or a continuous type, or a combination of a step type change and a continuous type change.

Further, the shape of the concave portion is not limited to a quadrangular shape, and various shapes can be used. For example, it may be a circle, an ellipse, a square, a triangle, or the like. Regardless of the shape, any shape can be formed on the surface of the absorber. Further, in the above embodiment, the numerical values such as the width and the depth of each of the concave portions are measured based on the vicinity of the center of the respective recesses whose width and depth are close to the maximum value. In this way, the numerical values such as the width and the depth of each concave portion are generally measured using the vicinity of the center of each concave portion as a reference. However, when the shape of each concave portion is complicated, the other portions of the concave portions may be used as the other portions. A measure of the value of a width or depth.

The structure of the disposable diaper according to the present invention is not limited to the above-described underpants type, and may be any diaper as long as it is a diaper comprising the absorbent article specified in the patent application. For example, the present invention can be applied even to a disposable diaper, a leak-proof diaper, or the like which is known as an unfolded type.

In addition, the present invention is not limited to diapers for infants and children, and can be applied to various absorbent articles such as diapers and leak-proof diapers for adults and absorbent bodies.

13‧‧‧Acceptor

403‧‧‧ Shaped deformation suppression department

501‧‧‧ slot

501a‧‧‧1st slot

501b‧‧‧2nd slot

501c‧‧‧3rd slot

502‧‧‧ recess

M1‧‧‧Previous part

M2‧‧‧胯下下

M3‧‧‧ later part

N1‧‧‧ trough formation area

N2‧‧‧ non-grooved formation area

P‧‧‧ imaginary line

Claims (7)

An absorbent article comprising a liquid permeable surface sheet, a non-liquid permeable back sheet, and an elongated absorbent body disposed between the surface sheet and the back sheet, wherein the absorption system is thin on the surface The surface on the sheet side has a plurality of compressed concave portions, and the plurality of compressed concave portions are formed to extend in the first direction along the both side edges of the absorbent body in the width direction, to the first pattern, and to the first pair of first portions. a second pattern extending between the patterns in a second direction different from the first direction, and a third pattern extending in a third direction intersecting the second pattern, the second pattern and the third pattern It is formed at least in the central region of the above absorbent body. The absorbent article according to claim 1, wherein at least one of each of the second pattern and the third pattern is in communication with the pair of first patterns. The absorbent article according to claim 1 or 2, wherein the plurality of compressed concave portions communicate with both ends of the pair of first patterns and are formed along two sides along the longitudinal direction of the absorbent body. One of the fourth directions of the end extends to the fourth pattern. The absorbent article according to any one of claims 1 to 3, wherein the second pattern is formed in parallel with the second direction, and the third pattern is formed in parallel with the third direction. A plurality of second patterns and third patterns are formed to have a lattice shape. The absorbent article according to any one of claims 1 to 4, wherein the plurality of compressed concave portions are integrally formed on the surface of the surface sheet together with the absorbent body. The absorbent article of any one of claims 1 to 5, wherein the plurality of pressures The constricted recesses are intermittently formed in the extending direction. The absorbent article according to any one of claims 1 to 5, wherein the plurality of compressed recesses are continuously formed in the extending direction.