TW202344234A - Absorbent article - Google Patents

Abstract

An absorbent article provided with a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body provided between the top sheet and the back sheet, the absorbent article having a longitudinal direction and a lateral direction orthogonal to the longitudinal direction, the absorbent article comprising a center groove that extends in the longitudinal direction and that is indented from the top sheet towards the back sheet, high compression parts being formed in the center groove in plan view. The high compression parts include discontinuous first high compression parts arranged along a first imaginary wave line extending in the longitudinal direction, and discontinuous second high compression parts arranged along a second imaginary wave line that intersects with the first imaginary wave line and that extends in the longitudinal direction. The first imaginary wave line and the second imaginary wave line are in line symmetry with each other about a longitudinal center line extending along the longitudinal direction of the absorbent article.

Description

absorbent articles

The present invention relates to an absorbent article.

As absorbent articles such as incontinence pads, sanitary napkins, pad-type diapers, etc., there are known absorbent articles that have the purpose of quickly diffusing body fluids discharged in large quantities at once in the front-to-back direction, and are used on the skin of the body. A groove extending along the longitudinal direction is formed on the side (for example, Patent Document 1).

Patent Document 1 describes that a high-compression portion is formed at the bottom of a groove; the high-compression portion is composed of a first embossing and a second embossing. The first embossing divides the groove in the longitudinal direction. The unit section is formed by extending in the lateral direction of the groove and being inclined with respect to the longitudinal direction of the groove, and traversing from one side end of the groove to the other side end, and is formed so that the unit section A pattern that repeatedly reverses forward and reverse directions in the longitudinal direction of the groove; the second embossing is formed on the side edge opposite to the convex portion of the first embossing that protrudes laterally outward. department.

[Prior technical literature] (patent document) Patent Document 1: Japanese Patent Application Publication No. 2016-2098

[Problem to be solved by the invention] In the structure described in Patent Document 1, the groove is reinforced by the high compression portion so that the groove is not easily crushed. However, the shape of the high compression portion, the compression strength during formation, etc. may cause the absorbent body in the portion where the high compression portion is provided to become excessively hard, thereby hindering the natural deformation of the absorbent body. Absorbent articles are usually used with a rounded arc along the front-to-back direction of the wearer's body and are bent in the long-side direction. However, in the above-mentioned conventional absorbent articles, it is difficult to bend along the shape of the body. A situation where adequate fit is not obtained.

In view of the above point of view, an object of one aspect of the present invention is to provide an absorbent article in which grooves extending in the longitudinal direction are formed on the skin side so that the absorbent article can be easily deformed along the shape of the wearer's body to improve fit.

[Technical means to solve problems] One aspect of the present invention is an absorbent article including a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet, and has a longitudinal direction. , and the transverse direction orthogonal to the aforementioned longitudinal direction; wherein, it is provided with: a central groove, which is recessed from the aforementioned top sheet toward the aforementioned back sheet and extends along the longitudinal direction; when viewed from above, a high compression is formed in the aforementioned central groove part; the aforementioned high compression part includes a first high compression part that is discontinuous along a first imaginary wavy line extending in the aforementioned longitudinal direction; and a second high compression part that is formed along a first imaginary wavy line extending in the aforementioned longitudinal direction; The extended second imaginary wavy line is discontinuous, and the second imaginary wavy line intersects the aforementioned first imaginary wavy line; the aforementioned first imaginary wavy line and the aforementioned second imaginary wavy line are arranged along the surface of the aforementioned absorbent article. The longitudinal center line extending in the longitudinal direction serves as a line of symmetry and is linearly symmetrical.

[Effects of the invention] According to one aspect of the present invention, there is an absorbent article in which grooves extending along the longitudinal direction are formed on the skin side so that the absorbent article can be easily deformed along the shape of the wearer's body to improve fit.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, unless otherwise specified in each drawing, the same or corresponding components will be assigned the same reference numerals and descriptions thereof will be omitted.

[First Embodiment] ＜Basic structure of absorbent articles＞ FIG. 1 is a plan view showing the absorbent article 1 according to the first embodiment. Moreover, FIG. 2 is a cross-sectional view taken along line I-I in FIG. 1 . As shown in Figures 1 and 2, the absorbent article 1 has a liquid-permeable top sheet 3, a liquid-impermeable back sheet 2, and an absorbent body 4 disposed between the two sheets; the entire state before wearing Roughly flat shape (Figure 2). When the absorbent article 1 is worn, the topsheet 3 side is the side that contacts the skin (skin side or surface side), and the backsheet 2 side is the side that is fixed to underwear (underwear side or back side). Fig. 1 is a diagram of the absorbent article 1 viewed from the skin side.

The absorbent article 1 has an elongated shape when viewed from above, and has a longitudinal direction (front-rear direction) D1 and a transverse direction (width direction or left-right direction) D2 orthogonal to the longitudinal direction D1. When the absorbent article 1 is worn, the longitudinal direction D1 corresponds to the front-rear direction of the wearer's body, and the lateral direction D2 corresponds to the left-right direction of the wearer's body. In the form shown in FIG. 1 , the absorbent article 1 has a center line extending along the longitudinal direction D1 (the center line dividing the absorbent article 1 into two halves in the transverse direction D2 ) when viewed from above, or the longitudinal direction. The center line (CL) is generally linearly symmetrical, but may not be linearly symmetrical. In addition, the structure other than the shape of the absorbent article 1 (including the density, material, and size of the compressed portion of the absorbent body 4, etc.) may be substantially symmetrical with the center line CL as the axis of symmetry, or may be asymmetrical. .

The back sheet 2 may be a sheet material that is at least waterproof, and may be a sheet material made of an olefin resin such as polyethylene or polypropylene. In addition, a laminated nonwoven fabric in which a nonwoven fabric is laminated on a polyethylene sheet or the like, or a laminated sheet of nonwoven fabric in which a waterproof film is sandwiched to ensure substantially liquid impermeability can be used. In addition, from the viewpoint of preventing stuffiness, it is desirable to use moisture-permeable materials. As such a waterproof and moisture-permeable sheet, microfibers obtained by melting an olefin-based resin such as polyethylene and polypropylene and mixing an inorganic filler and molding the sheet and then extending in one or both axis directions can be used. Porous sheets, etc.

The top sheet 3 can be a sheet that allows body fluids such as urine, menstrual blood, and leucorrhea to pass through. As the top sheet 3, porous or non-porous non-woven fabrics, porous plastic sheets, etc. can be suitably used. As the raw material fiber constituting the nonwoven fabric, a single type or a combination of two or more types of fiber can be used. Examples of the fiber include: olefins such as polyethylene and polypropylene; synthetic fibers such as polyester and polyamide; rayon or cupro fiber Regenerated fibers such as cotton; and blended fibers such as cotton; and natural fibers such as cotton. Examples of processing methods for nonwoven fabrics include spunlace, spunbonding, thermal bonding, melt blowing, and needle punching. Among these processing methods, the spunlace method is preferred because it can produce a soft nonwoven fabric, the spunbonding method can produce a highly drapeable nonwoven fabric, and the thermobonding method can produce a bulky and soft nonwoven fabric. is better from the point of view. In addition, composite fibers such as core-sheath fiber, side by side fiber, split fiber, etc., which have a fiber with a high melting point as the core and a fiber with a low melting point as the sheath, can also be used.

The absorbent body 4 is not limited as long as it is a material capable of absorbing and retaining body fluids, but preferably contains cotton pulp and a water-absorbent polymer. As the water-absorbent polymer, superabsorbent polymer granular powder (superabsorbent polymer (SAP)), superabsorbent polymer fiber (superabsorbent fiber (SAF)), and combinations thereof can be used. Examples of pulp include those composed of cellulose fibers such as chemical pulp and dissolving pulp obtained from wood, and artificial cellulose fibers such as rayon and acetate. As a raw material for chemical pulp, broad-leaved tree wood, coniferous tree wood, etc. can be used, but coniferous tree wood is suitable because of its long fiber length.

In addition, the absorbent body 4 may be mixed with synthetic fibers. As the synthetic fiber, a fiber obtained by mixing two or more of the following materials can be used, for example: polyolefin such as polyethylene or polypropylene; polyethylene terephthalate, polybutylene terephthalate Polyesters such as ester; polyamides such as nylon; and copolymers of these. In addition, composite fibers such as core-sheath type fibers, side-by-side fibers, split type fibers, etc., which have a fiber with a high melting point as a core and a fiber with a low melting point as a sheath, can also be used. In addition, it is also possible to surface-treat hydrophobic fibers using a hydrophilic agent to add affinity for body fluids to the fibers. It is preferable that the absorbent body 4 is manufactured by fiber laying or airlaid method.

The absorbent body 4 may be formed by wrapping the main body part of the absorbent body 4 with a covering sheet made of crepe paper, nonwoven fabric, or the like. The absorbent body 4 is provided with a covering sheet, thereby preventing the absorbent body 4 from being twisted or broken and maintaining its shape. As the covering sheet, uncolored (that is, white) crepe paper and nonwoven fabric can be used, or colored (for example, colored in the same color as the color of the body fluid or in a complementary color to the color of the body fluid) can be used.

The plan view shape of the absorber 4 may be an elongated shape having a substantially constant width as shown in FIG. 1 , or may be a shape in which the width of the absorber 4 varies along the longitudinal direction D1. The entire absorber 4 may have a uniform thickness over the entire surface, but the thickness of the absorber 4 may not be uniform, but may be thinner or thicker in some areas.

At both ends of the absorber 4 in the longitudinal direction D1, the edge of the back sheet 2 and the edge of the top sheet 3 can be joined by adhesive, heat sealing, etc. (shown as hatching in Figure 1) . Furthermore, a pair of side sheets 7, 7 may be arranged along the longitudinal direction D1 on both sides of the absorbent article 1, that is, on both sides in the transverse direction D2, on the front side (top sheet 3 side).

The side panels 7 can be constructed using nonwoven fabric materials that have been subjected to appropriate water-repellent or hydrophilic treatment in order to prevent the penetration of body fluids or improve the skin feel. The raw materials of the side panels 7 can be natural fibers, synthetic fibers, regenerated fibers, etc. Furthermore, when the side panels 7 are subjected to water-repellent treatment, a silicone-based, paraffin-based water-repellent agent, etc. can be used in the treatment. In addition, the absorbent article may have a structure in which the top sheet 3 is extended to the end of the absorbent article 1 in the transverse direction D2 and joined to the back sheet 2 without using the side sheets 7 . In addition, the side panels 7 may be made into two layers on each side by folding back or adding other individual side panels and overlapping them, and stretchable members such as rubber threads in a stretched state may be arranged to extend in the longitudinal direction. And intermittently fix it between the two layers to form an upright wrinkled part. Furthermore, for example, the side panels 7 are fixed to the inner end or the outer end in the width direction D2 so that the inner end or the outer end in the width direction D2 stands up toward the skin side when the stretch of the elastic member is relaxed. Obtain raised pleats on both sides.

The absorbent article 1 has a middle region M that mainly corresponds to the wearer's crotch when worn, a front region F adjacent to the front of the middle region M and up to the end of the absorbent article 1, and a front region F adjacent to the middle region. The rear area R is located behind the end of M and up to the rear of the absorbent article 1 . The middle area M includes the area Q facing the body fluid discharge port. The body fluid discharge opening facing area Q is an area facing the body fluid discharge opening of the wearer's urethral opening, vaginal opening, etc. when worn, and its center is located on the longitudinal center line CL. In the example shown in FIG. 1 , the body fluid discharge port-facing area Q is drawn as an ellipse and corresponds to the urethral opening. However, the size and shape of the body fluid discharge port-facing area Q shown in the figure are only for An example of an absorbent article according to this aspect will be described.

In addition, the front region F and the rear region R can be folded toward the skin side in the longitudinal direction D1 when absorbent articles are packaged individually. In the example of FIG. 1 , the folding of the front area F is performed by a polyline along the boundary line between the front area F and the middle area M; and the folding of the rear area R is performed by a folding line along the boundary line of the rear area R and the middle area M. The polyline of the boundary line is implemented. For the front area F and the rear area R, either side can turn back first. By this kind of folding, the absorbent article 1 can be folded into three or more folded layers.

The length (total length) of the entire longitudinal direction D1 of the absorbent article 1 is preferably 170 to 360 mm, more preferably 230 to 270 mm. The length of the absorbent article 1 in the transverse direction D2 (when provided with wings, the width of the main body excluding the wings) may be preferably 50 to 150 mm, more preferably 70 to 120 mm. In addition, the width of the absorbent body 4 sandwiched between the top sheet 3 and the back sheet 2 may be 50 to 100 mm. Furthermore, the overall thickness of the absorbent article 1 may be preferably 1 to 30 mm, more preferably 2 to 15 mm.

The absorbent article 1 shown in FIGS. 1 and 2 does not have wings, but the absorbent article 1 may have a pair of wings extending laterally from both edges of the middle region M respectively. The wings can be formed by joining the extensions of the side panels 7 and the extensions of the back panel 2 .

In addition, an anti-deviation portion (not shown) may be formed on the back sheet 2 side of the absorbent article 1 to more reliably fix the absorbent article 1 to underwear and prevent the absorbent article 1 from slipping when worn. offset. The anti-migration part is preferably an adhesive anti-migration part. The adhesive offset-preventing portion is formed, for example, by applying a fluid adhesive or a layer (adhesive tape, etc.) covered with a preformed adhesive. As the adhesive used for the offset prevention portion, a conventional adhesive, such as a hot-melt type adhesive, can be used. Examples of its main components include styrenic polymers, adhesion-imparting agents, plasticizers, and combinations of these components.

The skin side of the absorbent article 1 is provided with a groove that is recessed from the skin side to the non-skin side (that is, recessed from the top sheet 3 toward the back sheet 2 ). In the example shown in FIG. 1 , the grooves include a central groove 11 , a pair of oblique grooves 12Lf and 12Rf formed in front of the central groove 11 , and a pair of oblique grooves 12Lr and 12Rr formed in the rear of the central groove 11 . However, according to one aspect of the absorbent article 1, the oblique grooves 12Lf, 12Rf, 12Lr, and 12Rr may be omitted.

The groove is preferably a compression groove formed by compression. The compression grooves can be formed by passing a laminate composed of at least the absorber 4 and the top sheet 3 overlapping through a pair of pressure rollers. For example, a roll having a convex portion on its surface having a shape corresponding to a desired compression groove and a roll having a flat surface facing the roll can be prepared, and the roll having the convex portion is arranged on the top sheet 3 side and The laminate including the absorbent body 4 and the top sheet 3 is passed between rollers. In addition, a region where no compression groove is formed is shown as a non-compression portion 14 .

＜Central sulcus＞ The central groove 11 is a groove formed along the longitudinal direction D1 in the center of the absorbent article 1 in the transverse direction D2. The central groove 11 is a groove that is recessed from the top sheet 3 side toward the back sheet 2 side. If the absorbent article 1 is worn when receiving forces from both sides of the transverse direction D2, the central portion in the transverse direction D2 will easily become deformed. It protrudes toward the 2 sides of the back sheet (non-skin side). The recess on the skin side formed by the protrusion can store body fluid at least temporarily. In addition, when the central groove 11 is formed by compression, the density of the area of the central groove 11 is higher than that of the non-compressed area around the central groove 11, so it is easy to retain body fluids in the central groove 11.

The central groove 11 extends along the longitudinal direction D1, so it not only receives and temporarily stores body fluids as described above, but also has the function of guiding the body fluids toward the longitudinal direction D1. Especially in the case of forming the central groove 11 by compression, the density of the area where the central groove 11 is formed is higher than the density of the uncompressed areas on both sides of the transverse direction D2, so it is easier than in the transverse direction D2. The body fluid is induced toward the long side direction D1. By guiding the body fluid in the longitudinal direction D1, leakage of the body fluid in the transverse direction D2 can be prevented.

Furthermore, the central groove 11 is formed so as to overlap the body fluid discharge outlet facing area Q in the center of the transverse direction D2, and preferably is formed so as to overlap the longitudinal center line CL of the absorbent article 1. In the illustrated example, the center line of the central groove 11 extending along the longitudinal direction D1 (the line passing through the center of the width of the central groove 11 ) coincides with the longitudinal center line CL of the absorbent article 1 .

The central groove 11 is preferably formed to include the middle region M of the absorbent article 1, and more preferably is formed to include the body fluid discharge outlet facing region Q in the longitudinal direction D1. In addition, the central groove 11 is preferably formed in the middle region M. This allows the front region F and the rear region R of the absorbent article 1 to easily fit into the rounded arc surfaces along the front and rear of the body.

The length of the central groove 11 in the longitudinal direction D1 is preferably 50 to 160 mm, more preferably 55 to 80 mm. By setting the length within the above range, the body fluid can be sufficiently induced throughout the longitudinal direction D1, and a groove can be avoided to be formed near the center of the front region F and the rear region R in the width direction D2, thereby making the front region F and the rear region R, it is easier to fit the front and rear curves of the wearer's body.

The length (width) of the central groove 11 in the transverse direction D2 is preferably 3 to 15 mm, more preferably 4 to 8 mm. By setting the length (width) within the above range, even a large amount of body fluid can be easily stored in the central groove 11, and even if a strong force is applied from both sides of the transverse direction D2 and the central groove 11 is slightly deformed, the center can be maintained. The shape and function of the groove 11 as a groove.

＜High compression section＞ In this form, as shown in FIG. 1 , the high compression portion 20 is formed in the central groove 11 . The high compression portion 20 is a compressed portion deeper than the bottom surface of the central groove 11 . The high compression section 20 in this specification is shown in black in the drawing. However, the high compression section 20 is omitted from the cross-sectional view of FIG. 2 . When the central groove 11 itself is formed by compression, the central groove 11 has a high compression part 20 and a low compression part other than the high compression part 20 . In the example shown in the figure, the portion in the central groove 11 other than the high compression portion 20 becomes a low compression portion. In addition, the low-compression portion may be 1 to 10 mm deeper than the surrounding non-compressed portion (in the illustrated example, the area of the main body other than the central groove 11 and the oblique grooves 12Lf, 12Rf, 12Lr, 12Rr). Preferably, it is a portion that is 2 to 5 mm deeper; compared to the low compression portion in the central groove 11, the high compression portion 20 is a compressed portion that is 0.2 to 1 mm deeper.

If the high compression portion 20 is formed in the central groove 11, the bottom of the central groove 11 can be raised, and the rigidity of the side portions can be increased depending on the situation. This can prevent the central groove from being compressed even when a force is received from both legs when wearing it. The crushing of the groove 11 is a situation where the edge portions of the central groove 11 in the transverse direction D2 are brought closer to each other, so that the width between the edge portions becomes smaller and, depending on the situation, becomes closed. In addition, the high compression portions 20 are not formed in the entire area of the central groove 11, but are formed locally and dispersedly in the area of the central groove 11. Therefore, the bottom of the central groove 11 can be prevented from becoming excessively hard, and the absorbent article can be ensured 1 softness.

The high compression part 20, as shown in FIG. 1, has a first high compression part 21 that is discontinuous along the first imaginary wavy line WL1 extending in the longitudinal direction D1; and a second high compression part 22 that is discontinuous along the first virtual wavy line WL1 extending in the longitudinal direction D1. It is discontinuous along the second virtual wavy line WL2 extending in the longitudinal direction D1. FIG. 3 shows a partial enlarged view of the high compression unit 20 in FIG. 1 . Moreover, FIG. 4 shows an enlarged view of part II of FIG. 3 .

As shown in FIGS. 3 and 4 , the high compression section 20 (the first high compression section 21 and the second high compression section 22 ) is formed along virtual wavy lines (the first virtual wavy line WL1 and the second virtual wavy line WL2 ). , so when wearing, the forces received by the central groove 11 from both sides of the transverse direction D2 are easily transmitted along the imaginary wavy line in the central groove 11 toward the longitudinal direction D1. Therefore, even if a force is applied to a local location of the central groove 11 in the longitudinal direction D1, the force can be dispersed in the longitudinal direction D1 and the central groove 11 will not be easily crushed. In addition, the high compression portion in the central groove 11 overlaps with any one of the virtual wavy lines (the first virtual wavy line WL1 and the second virtual wavy line WL2), that is, there is no virtual wavy line in the central groove 11 that does not overlap. The high compression section can enhance the above effects.

Each of the imaginary wavy lines (the first imaginary wavy line WL1 and the second imaginary wavy line WL2) has a shape that has a radius of curvature at one end in the width direction D2. In other words, in the width direction D2 of the wave, The shape at the outermost position is a shape with a rounded arc. Thereby, even if a strong force from the leg is applied, excessive concentration of stress on a predetermined location can be suppressed, and the top sheet 3 can be prevented from being twisted or broken.

Furthermore, as shown in FIGS. 3 and 4 , neither the first high compression portion 21 along the first virtual wavy line WL1 nor the second high compression portion 22 along the second virtual wavy line WL2 is formed. Continuous. More specifically, the first high compression section 21 includes a plurality of first high compression section blocks 31A, 31B, 31C, 31D,... separated in the longitudinal direction D1; the second high compression section 22 includes a plurality of first high compression section blocks 31A, 31B, 31C, 31D,... A plurality of second high compression portion blocks 32A, 32B, 32C, 32D,... separated in the direction D1 (Fig. 4). In the first high compression part 21, the portions (discontinuous parts) 41, 41, ... between the first high compression part blocks 31A, 31B, 31C, 31D, ... become low compression parts; in the second high compression part 22 , the portions (discontinuous portions) 42, 42,... between the second high compression section blocks 32A, 32B, 32C, 32D,... become low compression sections.

In this way, by forming either the first high compression portion 21 or the second high compression portion 22 into a discontinuous shape, it is possible to prevent the bottom of the central groove 11 from being continuous in the longitudinal direction D1 and becoming excessively hard. Thereby, the absorbent article 1 is easily bent in the longitudinal direction D1. When worn, the absorbent article 1 is in contact with the absorbent article 1 in the front-to-back direction of the wearer's body, for example, from near the pubic bone through the crotch to the buttocks. It can fit closely along the rounded arc surface along the front and back direction of the body. Thereby, according to the structure of the high compression part of this form, it is possible to improve the fit in the front-to-back direction of the body when the absorbent article 1 is worn, while making it difficult for the central groove 11 to be crushed.

The first imaginary wavy line WL1 and the second imaginary wavy line WL2 may each have a random wavy shape or a regular wavy shape. However, if they repeat a regular pattern in the longitudinal direction D1, then the imaginary wavy line will follow the imaginary wave shape. It is preferable that the high-compression portions formed of lines can be formed in a regular pattern so that the ease of bending in the longitudinal direction D1 of the central groove 11 becomes uniform along the longitudinal direction D1. In addition, it is preferable that each of the first virtual wavy line WL1 and the second virtual wavy line WL2 has a fixed amplitude and a fixed wavelength along the length of the central groove 11 . The amplitudes and/or wavelengths of the first virtual wavy line WL1 and the second virtual wavy line WL2 may be the same as each other, or may be different from each other. The first virtual wavy line WL1 and the second virtual wavy line WL2 in FIG. 3 have the same wavelength (or the pitch of the concavities and convexities), and are expressed as P. P, can be 15~35mm.

Furthermore, as shown in FIG. 3 , the first virtual wavy line WL1 formed along the first high compression portion 21 and the second virtual wavy line WL2 formed along the second high compression portion 22 are defined by the longitudinal center line CL. Line symmetry is formed as a line of symmetry. Therefore, the first high compression portion 21 and the second high compression portion 22 may have line symmetry as an overall shape. Therefore, when leg force is applied from both sides of the absorbent article 1 in the transverse direction D2, the stress distribution in the longitudinal direction D1 generated in the high compression portion 20 can be made approximately symmetrical on the left and right, so that grooves can also be avoided. of twisting and skewing. In addition, in the example shown in FIG. 3 , the first virtual wavy line WL1 and the second virtual wavy line WL2 have the same amplitude and wavelength, and have shapes shifted by 180∘ in phase.

As shown in FIGS. 3 and 4 , there may be a plurality of intersection points IP, IP... of the first imaginary wavy line WL1 and the second imaginary wavy line WL2. Furthermore, the high compression unit 20 is not arranged at the intersection points IP, IP.... This can prevent the bottom of the central groove 11 from becoming excessively hard due to the high compression portions 20 being densely packed.

Furthermore, the number of first high compression portion blocks included in the range of the longitudinal direction D1 between adjacent intersection points IP and IP may be a plurality, preferably 2 to 5. Similarly, the number of second high compression portion blocks included in the range of the longitudinal direction D1 between adjacent intersection points IP and IP may be a plurality, preferably 2 to 5. Thereby, the discontinuous portions 41, 41... and 42, 42... can be increased so as to be more smoothly and naturally curved in the longitudinal direction D1. On the other hand, it can prevent the softness from being affected by the close proximity of the high compression portion blocks. loss.

In addition, the area of one high compression part block (the first high compression part block 31A, 31B, ... and the second high compression part block 32A, 32B, ...) may be 1.0 to 2.2 mm ² . Thereby, it is possible to obtain a structure that does not hinder the bending of the absorbent article 1 in the longitudinal direction D1 while maintaining the function of the high compression portion to reinforce the central groove 11 .

The shape of the high compression section 20 (the first high compression section 21 and the second high compression section 22) included in the range from one intersection IP to two adjacent intersection IPs can be determined by the two intersection points IP, Intersection points between IPs form point symmetry as symmetry points. In addition, the shape of the high compression section 20 in the range between two adjacent intersection points IP can be symmetrical with a straight line drawn in parallel to the width direction D2 at the intermediate position between the intersection IP and IP. Lines are formed into line symmetry.

As shown in FIG. 4 , the first high compression part 21 may be a shape obtained by cutting a corrugated belt body WB (illustrated with a dotted line) having a fixed width according to an imaginary cutting line along the transverse direction D2 . More specifically, the shape may be a shape in which the portion between the virtual cutting lines X1 and X2 and the portion between the virtual cutting lines X3 and X4 are removed from the corrugated belt WB. At this time, the first virtual wavy line WL1 may be a center line passing through the center of the width of the wavy belt WB. With such a shape formed by the first high compression part 21 based on the corrugated belt WB, even if the first high compression part blocks 31A, 31B, 31C, ... are separated in the longitudinal direction D1, the first high compression part area The blocks still maintain a certain degree of relationship with each other in terms of mechanical behavior. Therefore, even if a force is applied to a part of the first high compression portion 21, the force can be transmitted in the longitudinal direction D1 along the corrugated belt body WB.

On the other hand, the second high compression section 22 may have the ends of the second high compression section blocks 32A, 32B, 32C, 32D, ... in the longitudinal direction D1 converging on the second virtual wavy line WL2. shape. The second high compression section block, in the example shown in Figures 3 and 4, has an almond-shaped or leaf-shaped portion based on an imaginary cutting line along the transverse direction D2, preferably based on an imaginary cutting line parallel to the transverse direction D2. The shape obtained by cutting off the imaginary cutting line. More specifically, the shape may be a shape obtained by removing the portion between the virtual cutting lines X1 and X2 from the almond-shaped or leaf-shaped portion where both ends in the long side direction D1 converge on the second virtual wavy line WL2. In this embodiment, the area of the second high compression portion 22 is smaller than the area of the first high compression portion 21 , so the total area of the high compression portion in the area within the central groove 11 can be reduced. Therefore, even when compression is performed with high pressure when forming the high compression portion, the rigidity of the area within the central groove 11 can be prevented from being excessively increased, thereby preventing the absorbent article 1 from being prevented from bending when worn. In addition, the degree of freedom of the pattern drawn by the high compression portion can be increased to improve the designability.

In addition, the second high compression portion 22 may have the same shape based on the corrugated belt as the first high compression portion 21 . As a modified example of this aspect, FIG. 5 shows a form in which the second high compression portion 22 has the same shape as the first high compression portion 21 . In this example, the shape of the high-compression section block can also be linearly symmetrical with the longitudinal centerline CL as the symmetry line, and the lifting can avoid distortion or distortion caused by the force from both sides of the width direction D2. The effect is better from this point of view.

The distance d1 (Fig. 4) between the virtual cutting lines X1 and X2 in the longitudinal direction D1 may be 1 to 2 mm, preferably 1.5 to 1.8 mm. The distance d2 ( FIG. 4 ) in the longitudinal direction D1 between the virtual cutting lines X3 and X4 formed at different positions from the virtual cutting lines X1 and X2 may have the same length as the length of d1 . The distance d1 is the separation distance in the longitudinal direction D1 between the opposite end edges 31Ae and 31Be of the first high compression part blocks 31A and 31B, or the mutually opposite distance between the second high compression part blocks 32A and 32B. The separation distance of the end edges 32Ae and 32Be in the longitudinal direction D1. In addition, the distance d2 is the separation distance in the longitudinal direction D1 between the opposite end edges 31Be and 31Ce of the first high compression part blocks 31B and 31C, or the mutually opposite distance between the second high compression part blocks 32B and 32C. The separation distance of the end edges 32Be and 32Ce in the longitudinal direction D1. In this way, the length of the cutout portion between the virtual cutting lines in the longitudinal direction D1, that is, the length of the discontinuous portions 41, 41,... in the longitudinal direction D1 is set throughout the first high compression portion 21. By being equal, a plurality of basic axes for bending in the longitudinal direction D1 are reliably formed throughout the entire longitudinal direction D1 of the central groove 11, so the absorbent article 1 can be easily bent in the longitudinal direction D1. And natural.

In addition, the length in the longitudinal direction D1 of one high compression section block in the central groove 11 (the length from the frontmost edge to the rearmost edge of the high compression section block) may be uniform or may vary depending on the location. becomes different, it is preferably set to 1.2 to 1.9 mm.

As shown in FIG. 4 , the first high compression part 21 and the second high compression part 22 can be cut along a common virtual cutting line, such as virtual cutting lines X1 and X2 and virtual cutting lines X3 and X4. That is, the positions of the discontinuous portions 41, 41, ... in the first high compression portion 21 and the discontinuous portions 42, 42, ... in the second high compression portion 22 are aligned in the longitudinal direction D1. Thereby, the relatively soft low-compression portion in the central groove 11 is disposed across from one end to the other end in the transverse direction D2 of the central groove 11 . Therefore, a plurality of basic axes across the width of the central groove 11 for bending in the longitudinal direction D1 are reliably formed, making it easier to bend in the longitudinal direction D1 along the shape of the body's front and rear direction.

＜Shape of high compression section block＞ In at least the first high compression section 21, at least one end edge, preferably both end edges, of the long side direction D1 of the first high compression section blocks 31A, 31B, 31C, 31D,... One side in the width direction D2. "Parallel" in this specification not only refers to strictly parallel, but also includes directions from parallel to deviations within 10∘, preferably within 5∘.

The above-mentioned effects produced by the predetermined shape of the first high compression section block will be described with reference to FIGS. 6 and 7 . FIG. 6 shows an enlarged view of the first high compression section blocks 31B, 31C (FIG. 4). When the force LgF is applied to the central groove 11 from the outside in the transverse direction D2 while the absorbent article 1 is being worn (Fig. 6(a)), the first high compression portion blocks 31B and 31C with high rigidity in the central groove 11 are easily affected. Apply force. However, the end edges 31Be and 31Ce of the first high compression portion blocks 31B and 31C in the longitudinal direction D1 are along the transverse direction D2 (along the direction of the force LgF), so even if the force LgF is large, the first high compression is not easily changed. The orientation of the partial blocks 31B and 31C themselves. Therefore, deformation is less likely to occur in the region (low compression portion) between the first high compression portion block 31B and the first high compression portion block 31C. As the deformation of the central groove 11, it is easy to converge to the shrinkage in the lateral direction D2 of the area between the first high compression section blocks 31B, 31C and the edge of the central groove 11 (Fig. 6(b)).

On the other hand, FIG. 7 shows the end edges in the longitudinal direction D1 of the first high compression part block 31B', 31C' (the end edge 31Be' of the first high compression part block 31B' and the first high compression part block An example in which one side of the end edge 31Ce') of 31C' is not parallel to the transverse direction D2. When a force LgF is applied to such first high compression section blocks 31B' and 31C' from the outside in the transverse direction D2 (Fig. 7(a)), in the example shown in the figure, the force LgF is particularly easy to be applied to the first high compression section blocks 31B', 31C'. The protruding corner of the end edge 31Be' of the compression section block 31B'. Therefore, the central groove 11 is easily deformed to change the orientation of the first high compression section block 31B'. In this way, a distortion occurs in the area (low compression portion) between the first high compression portion block 31B' and the first high compression portion block 31C' (Fig. 7(b)), and this distortion can be associated with the entire center Skew of ditch 11.

In this way, the shape of the end edge in the longitudinal direction D1 of the high compression section block is formed along the transverse direction D2, preferably parallel to the transverse direction D2, thereby stably maintaining the high pressure in the central groove 11. The shape of the compression portion can thereby improve the effect of preventing the central groove 11 from being easily crushed.

In addition, the outline of the high compression portion 20 may be in contact with the outline of the central groove 11 or may be separated. In the case of separation, the separation distance in the transverse direction D2 may be 0.5 to 2 mm. Thereby, a low compression part is formed between the high compression part 20 and the non-compression part 14 without compression, and the thickness can be gradually reduced from the non-compression part 14 toward the high compression part 20 , thereby avoiding large stress concentration. to the contour of the central groove 11 to prevent the top sheet 3 from cracking and the absorbent body 4 from being deformed in an undesirable manner.

＜Oblique ditch＞ In this form, as shown in FIG. 1 , the grooves extend outward in the longitudinal direction D1 from the front end 11f of the central groove 11 (the end toward the longitudinal direction D1 of the absorbent article 1) and are further apart from the center. A pair of oblique grooves 12Lf and 12Rf are formed so that the grooves 11 become larger as they move apart; from the rear end 11r of the central groove 11 toward the outside in the longitudinal direction D1 (toward the long side of the absorbent article 1 A pair of oblique grooves 12Lr, 12Rr are formed such that the distance between them increases correspondingly as the distance from the center groove 11 increases. In FIG. 1 , a pair of oblique grooves 12Lf and 12Rf and a pair of oblique grooves 12Lr and 12Rr are formed both in front and behind the central groove 11 , but only any pair of oblique grooves may be formed. . The pair of oblique grooves, like the central groove 11, are preferably formed by compression. Furthermore, it is preferable that the pair of oblique grooves be left and right symmetrical with the longitudinal center line CL as the line of symmetry.

A Y-shaped groove can be formed by combining the central groove 11 and a pair of oblique grooves. Therefore, the absorbent article 1 can be deformed using the Y-shaped groove as a base axis, and can be adapted to the wearer's body. 3D deformation of shape. For example, the Y-shaped groove formed by the combination of the central groove 11 and the front pair of diagonal grooves 12Lf and 12Rf allows the area between the pair of diagonal grooves 12Lf and 12Rf to fit along the wearer's body. The rounded arc surface in front of the patient's body (the arc surface near the pubic bone), and a recessed portion sunk toward the non-skin side along the central groove 11 in the area corresponding to the crotch, can well withstand body fluids and remove them. spread. Similarly, the Y-shaped groove formed by the combination of the central groove 11 and the pair of rear oblique grooves 12Lr and 12Rr can follow the arcuate surface of the rear of the wearer's body (the arcuate surface near the buttocks). , and can well withstand and diffuse body fluids in the area corresponding to the crotch. This improves the fit of the absorbent article 1 and improves the effect of preventing leakage of body fluids.

In addition, a pair of oblique grooves (a pair of oblique grooves 12Lf, 12Rf and/or a pair of oblique grooves 12Lr, 12Rr) may or may not be continuous with the central groove 11. However, by setting Continuously, a clearer Y-shape can be reliably formed by the central groove 11 and the pair of oblique grooves, so that the above-mentioned effect of three-dimensional deformation suitable for the wearer's body shape can be enhanced.

High compression portions 25 ( 20 ) may be formed individually in a pair of oblique grooves (a pair of oblique grooves 12Lf, 12Rf and/or a pair of oblique grooves 12Lr, 12Rr). The high compression portion 25 is formed discontinuously in the respective extending directions in each of the oblique grooves 12Lf, 12Rf, 12Lr, and 12Rr. The high compression portion 25 is also formed in the oblique grooves 12Lf, 12Rf, 12Lr, and 12Rr, thereby imparting appropriate rigidity to the oblique grooves 12Lf, 12Rf, 12Lr, and 12Rr to reinforce each groove. When the absorbent article 1 is deformed during wearing, the diagonal grooves are not likely to be crushed.

In this way, in this embodiment, the high compression portions 21 and 22 formed in the central groove 11 are formed in the longitudinal direction D1 in the same manner as the high compression portions 25 formed in the oblique grooves 12Lf, 12Rf, 12Lr, and 12Rr. Discontinuous state. Compared with the case where the high compression portions 21 and 22 in the central groove 11 or the high compression portions 25 in the oblique grooves 12Lf, 12Rf, 12Lr, and 12Rr are made continuous in the longitudinal direction D1, this structure has the following features: advantages. For example, if any one of the highly compressed portions 21 and 22 in the central groove 11 is continuous in the longitudinal direction D1, the compression pressure will continuously and excessively hard press the central groove in the longitudinal direction D1. The bottom of 11 becomes hard. In this case, if a strong force is exerted by the legs etc. when wearing, the boundary between the high compression part and the low compression part may be damaged (for example, the top sheet 3 or the absorbent body 4 may be broken); in order to To reduce this possibility, the pressure during compression may be set to a small value. However, if the compression pressure is small, discontinuous high-compression portions cannot be formed sufficiently, and the function as a high-compression portion cannot be fulfilled. On the other hand, when the high compression portions 21 and 22 in the central groove 11 and the high compression portions 25 in the oblique grooves 12Lf, 12Rf, 12Lr, and 12Rr are made discontinuous in the longitudinal direction D1, This can also prevent damage to the absorbent article 1 and reliably form a high-compression portion.

In addition, as shown in FIG. 1 , the shape of each high compression section block in the high compression section 25 in the oblique grooves 12Lf, 12Rf, 12Lr, and 12Rr is preferably circular or elliptical in plan view. By setting the shape of the high compression portion block to have no corners when viewed from above, the rigidity of the high compression portion block itself is slightly reduced, thereby improving the flexibility of the oblique grooves 12Lf, 12Rf, 12Lr, and 12Rr. Compared with the middle area M, the front area F and the rear area R are closer to the body before the oblique grooves 12Lf, 12Rf, 12Lr, 12Rr are formed, so they can be improved by raising the oblique grooves 12Lf, 12Rf, 12Lr, 12Rr and The surrounding softness enhances the wearing feel.

In addition, the plan view area of each high compression portion block in the high compression portion 25 in the oblique grooves 12Lf, 12Rf, 12Lr, 12Rr can be set to be the same as the area of the high compression portion block in the central groove 11. The area is the same when viewed from above. The distance d3 between the high compression portion blocks in the high compression portion 25 in the oblique grooves 12Lf, 12Rf, 12Lr, and 12Rr (the distance along the extending direction of the oblique grooves) d3 (Fig. 3) can also be set to Similar to the distance between the high compression section blocks in the central groove 11, it may be preferably 1 to 2 mm, and more preferably 1.5 to 1.8 mm. This configuration is advantageous in narrowing the depth difference between the oblique grooves and the high-compression portions in the central grooves in the groove forming step.

[Second Embodiment] FIG. 8 shows the absorbent article 101 according to the second embodiment. Fig. 8 is a diagram corresponding to Fig. 1 and is a plan view viewed from the skin side. Moreover, FIG. 9 shows a partial enlarged view of the central groove 11 in the absorbent article 101 shown in FIG. 8 .

The basic structure of the absorbent article 101 is the same as the absorbent article 1 (FIG. 1). As shown in FIGS. 8 and 9 , in this embodiment as well, a discontinuous first high compression portion 121 along a first imaginary wavy line WL1 extending in the longitudinal direction D1 is formed in the central groove 11 , and Along the discontinuous second high compression portion 122 of the second virtual wavy line WL2 extending in the longitudinal direction D1, the second virtual wavy line WL2 intersects the first virtual wavy line WL1. Therefore, it is possible to prevent the area of the central groove 11 from being continuous in the longitudinal direction D1 and becoming excessively hard. Therefore, the absorbent article 101 is easily bent in the longitudinal direction, and the absorbent article 101 can be naturally bent along the shape of the wearer's body in the front-rear direction. Moreover, like the first embodiment, the first virtual wavy line WL1 and the second virtual wavy line WL2 are formed to be linearly symmetrical with the longitudinal center line CL as the symmetry line, so that the central groove 11 is less likely to be crushed. Therefore, it is possible to improve the fit of the absorbent article to the body while maintaining the effect of preventing the central groove 11 from being easily crushed in the lateral direction. Furthermore, like the first embodiment, a pair of oblique grooves 12Lf and 12Rf formed in front of the center groove 11 and a pair of oblique grooves 12Lr and 12Rr formed in the rear of the center groove 11 may be provided. High compression portions 125 (20) are individually formed in these oblique grooves.

This embodiment differs from the first embodiment (absorbent article 1) in the high compression portion 20 formed in the groove. More specifically, the first high compression section blocks 131A, 131B,... included in the first high compression section 121, and the second high compression section blocks 132A, 132B,... included in the second high compression section 122, Individually they become circular when viewed from above. In this way, in the embodiment of the present invention, the shape of the high compression section block (the first high compression section and/or the second high compression section) is not limited to an angular shape (Figs. 3 to 5), and may be Round, oval, etc. The high compression section block has an angular shape when viewed from above, while the high compression section block has an angular shape such as a circle when viewed from above. The case can improve softness, so it is better from the perspective of improving the wearing feel.

In the example of the figure, the first high compression part blocks 131A, 131B, ... included in the first high compression part 121, and the second high compression part blocks 132A, 132B included in the second high compression part 122, ..., configured to be staggered and offset in the long side direction D1. In this specification, the position of the first high compression part block and the position of the second high compression part block are staggered and offset in the longitudinal direction D1, which means that the positions of the first high compression part block and the second high compression part area are In the block, the positions of the front end and/or the rear end are not aligned in the longitudinal direction D1, and/or the position of the center in the longitudinal direction D1 is not aligned in the longitudinal direction D1. In the examples shown in FIGS. 8 and 9 , in the first high compression section blocks 131A, 131B, ... and the second high compression section blocks 132A, 132B, ... included in the second high compression section 122, the long sides The positions of both end edges in the direction D1 and the position of the center in the longitudinal direction D1 are not aligned in the longitudinal direction D1.

The above-mentioned arrangement of the first high compression section blocks 131A, 131B,... and the second high compression section blocks 132A, 132B,... included in the second high compression section 122 is used when forming a high compression section during manufacturing. advantageous. The high compression section is formed, for example, by passing the absorbent article between a pair of rollers having axes along the transverse direction D2 in the longitudinal direction D1. In this case, it can be formed together in one pass. The first high compression section 121 and the second high compression section 122 . At this time, if the positions of the first high compression section block and the second high compression section block in the longitudinal direction D1 are staggered, compression will be performed with either high compression section block as the main one. Since only one of the high-compression portion blocks is compressed, the pressure of the roll is not dispersed and one high-compression portion block can be formed with a clear outline more reliably.

Furthermore, the first high compression section blocks 131A, 131B,... included in the first high compression section 121 and the second high compression section blocks 132A, 132B,... included in the second high compression section 122 are preferably arranged at positions different from each other in the longitudinal direction D1.

As mentioned above, the present invention has been described based on the embodiments, but the present invention is not limited to these embodiments. In addition, various changes, corrections, substitutions, additions, deletions, combinations, etc. can be made to the above-described embodiment within the scope described in the patent claims, and these also belong to the technical scope of the present invention. Therefore, one feature described in this specification can also be combined with other features. For example, the structure of the central groove 11 in the second embodiment can be replaced and applied to the central groove 11 of the absorbent article 1 shown in FIG. 1 .

Hereinafter, specific aspects of the present invention will be further described.

(Note 1) Regarding the aspect of Appendix 1, it is an absorbent article including a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet, and has a longitudinal direction. , and the transverse direction orthogonal to the aforementioned longitudinal direction; wherein, it is provided with: a central groove, which is recessed from the aforementioned top sheet toward the aforementioned back sheet and extends along the longitudinal direction; when viewed from above, a high height is formed in the aforementioned central groove Compression part; the high compression part includes a first high compression part that is discontinuous along the first imaginary wavy line extending in the long side direction; and a second high compression part that is discontinuous along the long side direction. The second imaginary wavy line extending in the direction is discontinuous, and the second imaginary wavy line intersects the aforementioned first imaginary wavy line; the aforementioned first imaginary wavy line and the aforementioned second imaginary wavy line are arranged along the aforementioned absorbent article. The longitudinal center line extending in the longitudinal direction serves as a line of symmetry and is linearly symmetrical.

In the aspect of Appendix 1 above, the high-compression portion used to reinforce the groove includes a first high-compression portion formed along a first imaginary wavy line extending in the longitudinal direction; and a second high-compression portion, It is formed along a second imaginary wavy line extending in the longitudinal direction, and the second imaginary wavy line intersects the first imaginary wavy line. In this way, the high-compression portion is formed along the imaginary wavy line extending in the longitudinal direction, whereby when the central groove receives force from both sides in the lateral direction, the force is easily directed toward the long side along the imaginary wavy line. direction transmission, and it is not easy to collapse the central groove 11.

Furthermore, since either the first high compression portion or the second high compression portion is formed in a discontinuous shape along the longitudinal direction, it is possible to prevent the portion in the area of the central groove from being continuous in the longitudinal direction and becoming excessively hard. Therefore, the absorbent article can be easily bent in the longitudinal direction, and the absorbent article can be naturally bent along the shape of the wearer's body in the front-rear direction (the shape continuing from the vicinity of the pubic bone through the crotch to the buttocks). That is, the fit of the absorbent article to the body can be improved while maintaining the effect of preventing the central groove from being easily crushed in the lateral direction.

Furthermore, the first virtual wavy line formed along the first high compression section and the second virtual wavy line formed along the second high compression section are formed to be line symmetrical with the longitudinal centerline as the line of symmetry. Therefore, the arrangement of the high compression portion or the overall shape of the high compression portion becomes line symmetrical between the first high compression portion and the second high compression portion, and when leg force is applied from both sides of the absorbent article in the lateral direction, it is possible to The stress distribution in the longitudinal direction generated in the highly compressed portion can be made substantially symmetrical on both sides in the lateral direction, thereby preventing the groove from being distorted.

(Note 2) Regarding the aspect of Appendix 2, wherein the first high compression section is formed by a plurality of first high compression section blocks separated in the longitudinal direction, and the second high compression section is formed by a plurality of first high compression section blocks separated in the longitudinal direction. A plurality of second high compression section blocks are formed; 2 to 5 of the first high compression sections are individually arranged between the intersections of the adjacent first virtual wavy lines and the aforementioned second virtual wavy lines. block and the second highest compression section block.

According to the aspect of Appendix 2 mentioned above, by setting the number of discontinuous portions of the first high compression portion and the discontinuous portion of the second high compression portion to an appropriate number along the longitudinal direction, the grooves can be formed. The portions curve more smoothly along the long side, thereby improving the fit of the absorbent article to the body.

(Note 3) Regarding the aspect of Appendix 3, the high compression section is not arranged at the intersection point.

According to the above-mentioned aspect regarding Appendix 3, it is possible to avoid the density of highly compressed portions and to prevent the formation of excessively hard portions in the grooves.

(Note 4) Regarding the aspect of appendix 4, at least an end edge of the first high compression section block has one side parallel to a lateral direction, and the lateral direction is perpendicular to the longitudinal direction.

According to the aspect of Appendix 4 mentioned above, the end edge of the high compression section block is parallel to the lateral direction, so even if a force is applied to the central groove from the outside in the lateral direction, the orientation of the high compression section itself cannot be easily changed. Therefore, the possibility of distortion and skew in the area between the high compression section blocks (low compression section) can be reduced. This can prevent the entire central groove from being distorted, thereby improving the above-mentioned effect of making the central groove less likely to be crushed.

(Note 5) Regarding the aspect of appendix 5, one end edge of the first high compression section block and one end edge of the second high compression section block arranged in the transverse direction are located on a common straight line along the transverse direction.

According to the aspect of Appendix 5 described above, in the first high compression portion and the second high compression portion, the positions of the end edges of the high compression portion blocks are aligned when viewed from the longitudinal direction. That is, the positions of discontinuous portions of the high compression portion block are aligned when viewed from the longitudinal direction. Therefore, it is easy to form a base axis for bending the absorbent article in the longitudinal direction and to bend it in the transverse direction. This facilitates bending in the longitudinal direction, so that the fit of the absorbent article to the body can be further improved.

(Note 6) Regarding the aspect of Appendix 6, when viewed from the longitudinal direction, the position of the first high compression portion block and the position of the second high compression portion block are staggered and offset.

According to the aspect of Supplementary Note 6 above, when the high compression portion is formed along the longitudinal direction during the manufacture of the absorbent article, the pressing force used for compression is not likely to be in the first high compression portion area and the second high compression portion area. The blocks are scattered horizontally. Therefore, even if high pressure is not applied, the first high compression portion block of the first high compression portion and the second high compression portion block of the second high compression portion can be formed individually and reliably.

(Note 7) Regarding the aspect of Supplementary Note 7, further comprising: a pair of oblique grooves extending outward in the longitudinal direction from at least one end of the central groove in the longitudinal direction and being further apart from each other. The central grooves are formed so as to become larger as the distance between them increases, and discontinuous high-compression portions are formed in the pair of oblique grooves.

According to the aspect of Appendix 7 described above, a Y-shape can be formed by the central groove and the pair of oblique grooves. By using this Y-shaped groove as a base axis, the absorbent article can be easily deformed and can undergo three-dimensional deformation along the shape of the wearer's body. For example, if the central sulcus is sunken toward the non-skin side, and the two sides of the central sulcus are in close contact with the body, the area further forward than the central sulcus can be further closely connected to the arc surface in front of the body, or the area further forward than the central sulcus can be made closer to the body. The rear area is close to the rear arc of the body. Thereby, even when a large amount of body fluid is discharged at once, leakage to the outside in the longitudinal direction and the transverse direction can be prevented.

This application claims priority based on Japanese Patent Application No. 2022-011130 filed on January 27, 2022, the entire content of which is incorporated herein by reference.

1:Absorbent items 2:Back piece 3: Top film 4:Absorbent body 7: Side piece 11: Central ditch 11f: Front end 11r: Backend 14: Non-compression part 20,125: High compression section 21,121: first high compression section 31A, 31B, 31B’, 31C, 31C’, 31D,…, 131A, 131B,…: first high compression section block 31Ae,31Be,31Be’,31Ce,31Ce’: edge 41: Discontinuity Department 22,122: Second highest compression section 32A, 32B, 32C, 32D,…,132A,132B,…: The second highest compression block 32Ae,32Be,32Ce: edge 42: Discontinuity Department 12Lf, 12Rf, 12Lr, 12Rr: oblique groove 25: High compression part CL: Long side center line D1: Long side direction D2: Horizontal direction F: forward area M: middle area R:Rear area Q: Area opposite the body fluid discharge port WL1: The first imaginary wavy line WL2: The second imaginary wavy line IP:intersection P: wavelength WB: wavy belt X1, X2, X3, X4: Imaginary cutting line d1,d2,d3:interval LgF:Strength

Fig. 1 is a plan view of an absorbent article according to one embodiment. FIG. 2 is a cross-sectional view taken along line I-I in FIG. 1 . FIG. 3 is a partial enlarged view of the central groove shown in FIG. 1 . FIG. 4 is an enlarged view of part II of FIG. 3 . FIG. 5 shows a modified example of the high compression section. FIG. 6 is a diagram illustrating an example of a preferred shape of the high compression section block. FIG. 7 is a diagram illustrating an example of the shape of the high compression section block corresponding to FIG. 6 . Fig. 8 is a plan view of the absorbent article according to the second embodiment. FIG. 9 is a partial enlarged view of the central groove shown in FIG. 8 .

Domestic storage information (please note in order of storage institution, date and number) without

Overseas storage information (please note in order of storage country, institution, date, and number) without

1:Absorbent items

3: Top film

4:Absorbent body

7: Side piece

11: Central ditch

11f: Front end

11r: Backend

14: Non-compression part

20: High compression part

21: First high compression section

22: Second high compression section

12Lf, 12Rf, 12Lr, 12Rr: oblique groove

25: High compression part

CL: Long side center line

D1: Long side direction

D2: Horizontal direction

F: forward area

M: middle area

R:Rear area

Q: Area opposite the body fluid discharge port

Claims (7)

An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet, and having a longitudinal direction and a direction orthogonal to the longitudinal direction. transverse direction of intersection; Wherein, it is provided with: a central groove which is recessed from the top sheet toward the back sheet and extends along the longitudinal direction; When viewed from above, a highly compressed portion is formed in the aforementioned central groove; The high compression portion includes a first high compression portion that is discontinuous along a first imaginary wavy line extending in the longitudinal direction; and a second high compression portion that is discontinuous along a first imaginary wavy line extending in the longitudinal direction. The second imaginary wavy line is discontinuous, and the second imaginary wavy line intersects the aforementioned first imaginary wavy line; The first virtual wavy line and the second virtual wavy line are linearly symmetrical with a longitudinal center line extending in the longitudinal direction of the absorbent article as a symmetry line. The absorbent article according to claim 1, wherein the first high compression portion is formed by a plurality of first high compression portion blocks separated in the longitudinal direction, The aforementioned second high compression portion is formed by a plurality of second high compression portion blocks separated in the aforementioned longitudinal direction; Between the intersections of the adjacent first virtual wavy lines and the adjacent second virtual wavy lines, 2 to 5 of the first high compression section blocks and the second high compression section blocks are respectively arranged. The absorbent article according to claim 2, wherein the high compression portion is not arranged at the intersection point. The absorbent article according to claim 2 or 3, wherein at least the end edge of the first high compression section block has one side parallel to the lateral direction, and the lateral direction is perpendicular to the long side direction. The absorbent article according to claim 4, wherein one end edge of the first high compression section block and one end edge of the second high compression section block arranged in the transverse direction are located in a common position along the transverse direction. on the straight line. The absorbent article according to claim 2 or 3, wherein the position of the first high compression section block and the position of the second high compression section block are staggered and offset when viewed from the longitudinal direction. The absorbent article according to any one of claims 1 to 6, further comprising a pair of oblique grooves extending from at least one end of the central groove in the longitudinal direction toward the longitudinal direction. are formed in such a manner that the distance between them increases as the distance from the central groove increases. Discontinuous high-compression portions are formed in the pair of oblique grooves.