JP6754588B2 - Absorbent article - Google Patents

Description

The present invention relates to absorbent articles such as sanitary napkins, panty liners, incontinence pads, disposable diapers for absorbing menstrual blood, vaginal discharge, urine, etc., and more specifically, squeezing grooves on both sides on the skin contact surface side. With respect to the absorbent article in which the was formed.

Conventionally, as the absorbent article, an absorber is interposed between a liquid-impermeable back sheet such as a polyethylene sheet or a polyethylene sheet laminated non-woven fabric and a liquid-permeable front sheet such as a non-woven fabric or a liquid-permeable plastic sheet. It has been known.

Many improvements have been made to this type of absorbent article, and squeezing grooves are formed in various patterns on the skin contact surface side for the purpose of fitting to the body and preventing twisting when worn. Have been proposed in large numbers. However, for example, if you are wearing a panty liner or sanitary napkin before menstruation to prevent menstrual blood from adhering to your shorts, or if you keep wearing the napkin without replacing it when the amount of blood drained at the end of menstruation is low. If you continue to wear a sanitary napkin or panty liner for a long time, the movement of your body, especially the movement of your legs, may cause the absorbent article to twist, causing leakage or twisting from this twisted part. There was a problem that the part led to a sense of discomfort.

For the purpose of preventing such twisting at the time of wearing, in the following Patent Document 1, the inner surface sheet located on the body side faces the outer surface sheet located on the opposite side to the body side, and the vertical direction and the horizontal direction It is disclosed that a plurality of squeezed grooves extending so as to intersect each other and forming a lattice pattern are formed.

Further, in Patent Document 2 below, a vertically long annular squeezed groove formed by pressing the surface sheet and the absorber in the thickness direction and a region surrounded by the annular squeezed groove are formed at a portion where the surface sheet and the absorber overlap. There is disclosed a low-pressure squeezing area having a low-pressure squeezing recess formed by squeezing a surface sheet and an absorber in the thickness direction, which are located at both ends in the vertical direction.

Further, in Patent Document 3 below, there are a pair of squeezed grooves extending in the length direction on both sides of the upper surface of the region where the absorbent core is located and having a narrow interval in the central portion thereof, and the squeezed grooves are formed. , A sanitary napkin having a high pressure squeezed portion and a low pressure squeezed portion alternately arranged in the length direction of the bottom surface thereof is disclosed.

Japanese Unexamined Patent Publication No. 2011-200357 Japanese Unexamined Patent Publication No. 2014-97132 Japanese Unexamined Patent Publication No. 9-108262

In Patent Document 1, since the inner and outer surface sheets are joined by the welded portion at the portion where the squeezed groove is formed, the movement of the core material is hindered, and the core material is the outer surface sheet when the panty liner is worn. It is stated that it can be prevented from moving and twisting, but since the squeezed groove is formed in almost the entire area of the inner surface sheet, the skin contact surface of the entire product becomes hard, and in particular, body fluid is discharged. If the squeezed groove comes into contact with the portion, there is a risk of causing a sense of discomfort during mounting.

Further, in Patent Document 2, by providing the annular squeezing groove and the low pressure squeezing recess, the central portion is raised toward the user side at the time of mounting to reduce leakage, and at the time of mounting, both legs of the user are inward. It suppresses wrinkles parallel to the vertical direction when a lateral force is applied toward it, and prevents irregular deformation of the product. As a result, it is possible to improve usability and prevent leakage. The effect of is described. However, there is a risk that wrinkles that enter in any direction due to body movement cannot be sufficiently dealt with.

Further, in Patent Document 3, it is described that the conforming adhesion of the napkin to the female local part is improved by providing the squeezed groove, but the napkin is deformed into a certain form along the squeezed groove. However, if complicated leg pressure is applied from multiple directions at the time of mounting, there is a possibility that it cannot be sufficiently dealt with.

Therefore, a main object of the present invention is to provide an absorbent article which can prevent twisting in response to leg pressure from multiple directions and has an excellent wearing feeling.

In order to solve the above problem, as the present invention according to claim 1, a recess is provided on the skin contact surface side of the main body portion in which an absorber is interposed between the front surface sheet and the back surface sheet toward the non-skin contact surface side. In an absorbent article in which a squeeze groove is formed
The squeezing grooves are continuously formed on both sides of the region corresponding to the body fluid discharge site along the longitudinal direction of the absorbent article, and the non-squeezing groove has a circular planar shape and is surrounded by the squeezing grooves. The portions are formed in a pattern in which a plurality of portions are arranged along the longitudinal direction of the absorbent article, and are not formed at least in the region corresponding to the body fluid discharge site .
The size of the non-squeezed portion is small at the central portion in the longitudinal direction and is formed so as to gradually increase toward both ends in the longitudinal direction, or is large at the central portion in the longitudinal direction and gradually decreases toward both ends in the longitudinal direction. An absorbent article is provided characterized in that it is formed in such a manner .

In the invention according to claim 1, the squeezing grooves are continuously formed on both sides of the region corresponding to the body fluid discharge site along the longitudinal direction of the absorbent article, and are surrounded by the squeezing grooves. Since the non-squeezed portion having a circular planar shape is formed in a pattern in which a plurality of non-squeezed portions are arranged along the longitudinal direction of the absorbent article, the squeezing is performed when leg pressure from both sides in the width direction acts inward during mounting. By having multiple non-squeezed parts surrounded by grooves, it becomes possible to counter leg pressure not only from one direction but also from multiple directions, and it is possible to surely prevent twisting of absorbent articles and squeeze grooves. It will be possible to prevent twisting along the pattern of.

Further, since the squeezing grooves are formed on both sides of the region corresponding to the body fluid draining site and not formed in the region corresponding to the body fluid draining site, the squeezing groove that is compacted and made highly rigid at the time of wearing is used as the body fluid draining site. There will be no discomfort due to contact, and the fit will be excellent.

Since the plane shape of the non-squeezed portion is particularly circular, there is no directionality of resistance to leg pressure, and corners and sudden changes in curvature are not formed on the outer line of the non-squeezed portion, so that twisting occurs. not desirable because there is so suppressed reliably.

Further, in the present invention, the non-squeezed portion is not formed to have a constant size, but is a pattern that is small in the central portion in the longitudinal direction and gradually increased toward both ends in the longitudinal direction, or is large in the central portion in the longitudinal direction and is large in the longitudinal direction. It is one of the patterns that are gradually reduced toward both ends. In the former case, the discomfort in the crotch part can be reduced, and in the latter case, the resistance to leg pressure in the crotch part can be increased.

As the present invention according to claim 2, wherein the region which does not overlap with the region where the compression grooves are formed, the absorbent article according to claim 1 Symbol placement second compression groove is formed is provided.

In the invention according to claim 2, the second squeezing groove is formed in a region that does not overlap with the region where the squeezing groove is formed, thereby reinforcing a portion where twisting due to leg pressure is likely to occur. The second squeezing groove may be formed in a pattern in which a plurality of non-squeezed portions surrounded by the squeezing groove are arranged, or may be formed in a simple linear shape.

As described in detail above, according to the present invention, it is possible to provide an absorbent article having an excellent wearing feeling while being able to prevent twisting in response to leg pressure from multiple directions.

It is a partially broken development view of the sanitary napkin 1 which concerns on this invention. FIG. 2 is a view taken along the line II-II of FIG. It is an enlarged plan view of the squeeze groove 10. It is a top view of the sanitary napkin 1 which shows the leg pressure acting at the time of wearing. It is a top view which shows the twist at the time of wearing a conventional sanitary napkin. It is a top view of the sanitary napkin 1 which shows the modification (the 1) of the squeeze groove 10. It is a top view of the sanitary napkin 1 which shows the modification (the 2) of the squeeze groove 10. It is a top view of the sanitary napkin 1 which shows the modification (the 3) of the squeeze groove 10. It is a top view of the sanitary napkin 1 which shows the arrangement area of the 2nd squeeze groove 12.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Basic configuration of sanitary napkin 1]
As shown in FIGS. 1 and 2, the sanitary napkin 1 according to the present invention has an impermeable back sheet 2 made of a polyethylene sheet or the like and a liquid permeable surface that rapidly permeates menstrual blood or vaginal discharge. The sheet 3 and the absorbent body 4 mainly composed of cotton-like pulp or synthetic pulp and a superabsorbent polymer interposed between the sheets 2 and 3, and if necessary, the shape retention of the absorbent body 4 and In order to improve diffusivity, it is mainly composed of an encapsulating sheet 5 that surrounds the absorber 4. Further, if necessary, a hydrophilic second sheet can be arranged between the liquid permeable surface sheet 3 and the absorber 4.

Hereinafter, the structure of the sanitary napkin 1 will be described in more detail.
As the liquid-impermeable back sheet 2, a sheet material having at least water impermeability such as an olefin resin sheet such as polyethylene or polypropylene is used, but in addition to this, a laminated non-woven fabric in which a non-woven fabric is laminated on a polyethylene sheet or the like, and further A non-woven fabric sheet (in this case, the waterproof film and the non-woven fabric form the impermeable back sheet) or the like can be used after substantially ensuring the impermeable property by interposing a waterproof film. In recent years, from the viewpoint of preventing stuffiness, those having moisture permeability have tended to be used. This water-impervious / moisture-permeable sheet material is a microporous sheet obtained by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in the uniaxial or biaxial direction. Is.

Next, as the liquid-permeable surface sheet 3, a perforated or non-perforated non-woven fabric, a porous plastic sheet, or the like is preferably used. The material fibers constituting the non-woven fabric can be, for example, olefin-based fibers such as polyethylene or polypropylene, synthetic fibers such as polyester-based and polyamide-based, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A non-woven fabric obtained by an appropriate processing method such as a method, an airlaid method, a spunlace method, a spunbond method, a melt blown method, or a needle punching method can be used. Among these processing methods, the spunlace method is excellent in that it is rich in flexibility and drapeability, and the thermal bond method is excellent in that it is bulky and has high compression stability.

The absorber 4 interposed between the impermeable back sheet 2 and the liquid permeable surface sheet 3 is composed of, for example, fluffy pulp and a water-absorbing polymer. In the illustrated example, the planar shape is a vertically long oval shape that is long in the longitudinal direction of the napkin.

Examples of the pulp include cellulose fibers such as chemical pulp and dissolved pulp obtained from wood, and artificial cellulose fibers such as rayon and acetate, and coniferous pulp having a longer fiber length has more functions than broadleaf pulp. It is preferably used in terms of price. Basis weight of the ^{pulp, 100g / m 2 ~600g / m} 2, and it is preferably a ^{100g / m 2 ~300g / m 2} .

The water-absorbent polymer is mixed in the pulp constituting the absorber, for example, as granular powder. Examples of the highly water-absorbent polymer include a polyacrylic acid crosslinked product, a self-crosslinked polyacrylic acid salt, a saponified product of an acrylic acid ester-vinyl acetate copolymer crosslinked product, and an isobutylene / maleic anhydride copolymer crosslinked product. Examples thereof include a crosslinked polysulfonate and a partially crosslinked water-swellable polymer such as polyethylene oxide and polyacrylamide. Of these, acrylic acid or acrylate-based ones having excellent water absorption and water absorption rate are preferable. In the manufacturing process, the highly water-absorbent resin having the water-absorbing performance can adjust the absorption ratio (water absorption capacity) and the absorption rate by adjusting the cross-linking density and the cross-linking density gradient.

Further, synthetic fibers may be mixed with the absorber 4. As the synthetic fiber, for example, polyolefin-based synthetic fibers such as polyethylene or polypropylene, polyester-based materials such as polyethylene terephthalate and polybutylene terephthalate, polyamide-based materials such as nylon, and copolymers thereof can be used, and these two types can be used. It may be a mixture. Further, composite fibers such as core-sheath type fibers having a high melting point fiber as a core and a low melting point fiber as a sheath, side-by-side type fibers, and split type fibers can also be used. In the case of hydrophobic fibers, it is desirable to use the synthetic fibers surface-treated with a hydrophilizing agent so as to have an affinity for body fluids.

The width dimension of the absorber 4 may be substantially the same width over the entire length, and corresponds to the crotch portion including the body fluid discharge portion H so as not to give the wearer a feeling of stiffness due to hitting the crotch portion. A portion notched in an arc shape may be provided in a predetermined section in the longitudinal direction.

When the encapsulating sheet 5 surrounding the absorber 4 is provided as in this example, as a result, the encapsulating sheet 5 is interposed between the liquid permeable surface sheet 3 and the absorber 4. The encapsulating sheet 5 having excellent absorbability rapidly diffuses body fluids and prevents reversion of menstrual blood and the like. As the encapsulation sheet 5, crepe paper, hydrophilic non-woven fabric, or the like can be used.

[Pressure groove 10]
The sanitary napkin 1 has a skin contact surface side (liquid permeability) in a predetermined region of the main body portion in which the absorber 4 is interposed between the liquid permeable front sheet 3 and the impermeable back sheet 2. A squeezing groove 10 that is dented toward the non-skin contact surface side (impermeable back sheet 2 side) by squeezing from the outer surface side of the front surface sheet 3 is provided in a predetermined pattern.

The squeezing grooves 10 are continuously formed on both sides of the body fluid draining site along the longitudinal direction of the sanitary napkin 1, and the non-squeezing portions 11 surrounded by the squeezing grooves 10 are sanitary napkins. It is formed by a plurality of patterns arranged along the longitudinal direction of 1.

As shown in FIG. 2, the squeezing groove 10 is formed by integrally compressing the liquid permeable surface sheet 3 to the absorber 4 by squeezing from the outer surface side of the liquid permeable surface sheet 3. is there. As shown in FIG. 1, the squeezing groove 10 is formed outside the region corresponding to the body fluid discharge site H of the wearer with respect to the width direction of the sanitary napkin 1, and the sanitary napkin 1 is formed. In the longitudinal direction of the above, at least from the front side including the body fluid discharge site H of the wearer to the rear side, in the illustrated example, it is formed over substantially the entire length of the absorber 4. The squeezing grooves 10 are continuously formed on both sides in the width direction without being divided in the middle.

In the squeezing groove 10, as shown in FIG. 3, the squeezing groove 10 surrounding the periphery of any non-squeezed portion 11 and the squeezing groove 10 surrounding the periphery of the adjacent non-squeezed portion 11 are directly connected to each other. It is formed in a pattern in which another pressing groove connecting these pressing grooves 10 and 10 is not interposed. That is, a part of the pressing grooves 10 and 10 surrounding the adjacent non-squeezing portions 11 and 11 is arranged so as to be common. If the squeezing grooves 10 and 10 surrounding the adjacent non-squeezing portions 11 and 11 are connected by another linear squeezing groove, the resistance to leg pressure is reduced by the connected squeezing groove portion. However, it is not preferable because twisting easily occurs from this portion as a base point.

On the skin contact surface of the sanitary napkin 1, the non-squeezed portion 11 has an island shape in which the circumference is recessed by being surrounded by the squeezing groove 10 on the entire circumference. The non-squeezed portion 11 is surrounded by a squeezing groove 10 which is compacted by squeezing from the outer surface side of the liquid-permeable surface sheet 3 to have high rigidity, thereby strengthening the entire non-squeezed portion 11 and resisting an external force. The power is increasing.

The non-squeezed portion 11 may be arranged so as to be aligned in a straight line with respect to the longitudinal direction of the sanitary napkin 1 (FIGS. 1 and 6 (A) to (D), etc.), or with respect to the width direction. They may be arranged in a zigzag pattern in which they are alternately displaced (FIGS. 6 (E) and 7 (B)), or arranged so that part or all of them bulge inward or outward in the width direction. It may be (FIGS. 9 (B) to (D)).

On the other hand, the squeezing groove 10 is not formed at least in the region corresponding to the body fluid discharge site H. The region corresponding to the body fluid discharge portion H is a region in which the wearer's body fluid discharge portion H abuts when worn, is a central portion in the width direction of the sanitary napkin 1, and is a region in the middle portion in the longitudinal direction. Specifically, the range of 20 to 50 mm with respect to the width direction of the sanitary napkin 1 and the range of 50 to 100 mm with respect to the longitudinal direction are preferable.

In this way, the squeezing grooves 10 are continuously formed on both sides of the region corresponding to the body fluid discharge site H along the longitudinal direction of the sanitary napkin 1, and the periphery is not surrounded by the squeezing grooves 10. By forming a plurality of squeezed portions 11 in a pattern arranged along the longitudinal direction of the sanitary napkin 1, as shown in FIG. 4, when leg pressures from both sides in the width direction to the inside act during wearing, the above-mentioned The presence of a plurality of non-squeezed portions 11 surrounded by the squeezing groove 10 makes it possible to counter leg pressure not only in one direction but also in multiple directions, and the sanitary napkin 1 can be reliably prevented from twisting. At the same time, it becomes possible to prevent twisting along the pattern of the squeezing groove 10.

Explaining the twist due to the leg pressure at the time of wearing in more detail, as shown in FIG. 4, the sanitary napkin 1 at the time of wearing basically has leg pressure acting from both sides in the width direction toward the inside. The actual direction of action is not always constant but changes randomly depending on the movement and position of the legs such as walking and the posture of the wearer. Therefore, if the leg pressure from the random direction cannot be dealt with, the twist as shown in FIG. 5 will occur, and there is a concern that leakage from the twisted portion or deterioration of the wearing feeling due to the twisted portion. FIG. 5A shows the state of occurrence of twisting when walking with a conventional sanitary napkin without a squeeze groove. Without the squeeze groove, a large number of twists and fine twists that cross the width direction of the sanitary napkin occur, especially in the crotch area. Further, in FIG. 5B, as described in Patent Document 3, high-pressure squeezing portions and low-pressure squeezing portions alternate along the groove direction on the bottom surface of the linear squeezing groove along the longitudinal direction of the napkin. It shows the state of occurrence of twisting when walking with a conventional sanitary napkin formed in. In such a squeezing groove, a small twist is generated from the high pressure squeezing portion or the low pressure squeezing portion as a base point. On the other hand, in the sanitary napkin 1, as shown in FIG. 4, a plurality of non-squeezed portions 11 enhanced by the surrounding squeezing grooves 10 are arranged along the longitudinal direction, so that the non-squeezed portions 11 are arranged along the longitudinal direction. The 11 can exert a resistance force corresponding to the leg pressure from a random direction, and can prevent the sanitary napkin 1 from being twisted.

Further, since the squeezing grooves 10 are arranged on both sides of the region corresponding to the body fluid discharge portion H and are not formed at least in the region corresponding to the body fluid discharge portion H, the squeezing groove 10 is compacted by squeezing to increase the rigidity. The feeling of discomfort caused by the squeezing groove 10 coming into contact with the body fluid discharge portion of the wearer does not occur, and the wearing feeling becomes excellent.

Next, the size of the non-squeezed portion 11 will be described. As shown in FIGS. 1 and 3, the dimension a in the width direction of the napkin is 1 to 30%, preferably 1 to 30%, based on the width W of the absorber 4. It should be 10 to 20%. If the dimension a is less than 1% of the absorber width W, the non-squeezed portion 11 is too small to exhibit resistance to leg pressure. Further, when the dimension a is larger than 30% of the absorber width W, the non-squeezed portion 11 is too large, the strengthening effect of the squeezed groove 10 is reduced, and the resistance to leg pressure may be reduced, and the non-squeezed portion 11 is not. The squeezed portion 11 may become too large and the non-squeezed portion 11 itself may be twisted, and the squeezing groove 10 surrounding the non-squeezed portion 11 may come into contact with the body fluid discharge portion of the wearer to cause a sense of discomfort. is there.

Further, it is preferable that the dimension b in the longitudinal direction of the napkin is substantially the same as the dimension a in the width direction of the napkin. By forming the non-squeezed portion 11 having substantially the same size in the width direction and the longitudinal direction of the napkin, the resistance force against the leg pressure from multiple directions is likely to act evenly, and the occurrence of twisting can be suppressed. For example, when the width W of the absorber 4 is 50 mm, the size (a, b) of the non-squeezed portion 11 is preferably 0.5 mm to 15 mm, preferably 1 mm to 10 mm.

It is preferable to arrange 6 to 45, preferably 10 to 45, non-squeezed portions 11 along the longitudinal direction of the sanitary napkin 1. The number of the non-squeezed portions 11 varies depending on the size of the non-squeezed portions 11, and the smaller the non-squeezed portions 11, the larger the number of arrangements, and the larger the non-squeezed portions 11 the smaller the number of arrangements. By reducing the size of the non-squeezed portion 11, it becomes possible to finely respond to the leg pressure and reduce the discomfort at the time of wearing.

Next, the position of the squeezing groove 10 with respect to the absorber 4 will be described. As shown in FIG. 1, the separation distance c between the side edge of the absorber 4 and the outer end in the width direction of the squeeze groove 10 along the napkin width direction is 1 to 20% with respect to the width W of the absorber 4. It is preferably 5 to 20%. If this separation distance c is less than 1% of the absorber width W, the squeezing groove 10 is too close to the side edge of the absorber 4, and the portion hardened by the squeezing groove 10 may come into direct contact with the skin, which is not preferable. .. On the other hand, if the separation distance c is larger than 20% with respect to the absorber width W, the squeezing groove 10 may go too far inside the absorber 4 and the resistance to leg pressure may not be exhibited.

Further, the separation distance d between the longitudinal edge of the absorber 4 and the longitudinal end of the napkin 10 of the squeezing groove 10 along the longitudinal direction of the napkin is 1 to 30% with respect to the length L of the absorber 4. , Preferably 3 to 20%. If this separation distance d is smaller than 1% of the absorber length L, the squeezing groove 10 may be too close to the longitudinal edge of the absorber 4 and the hardened portion of the squeezing groove 10 may directly hit the abdomen or buttocks. Therefore, it is not preferable. On the other hand, if the separation distance d is larger than 30% of the absorber length L, the range in which the squeezing groove 10 is formed is too short and may not cover both sides of the body fluid discharge portion H, which is not preferable.

The squeezing groove 10 preferably has a groove width (width of the bottom surface of the groove) of 1 to 5 mm. The groove depth is preferably 20 to 90% of the thickness of the absorber 4.

The squeezing groove 10 is preferably formed in a pattern in which the non-squeezed portions 11 are arranged in one or more rows, preferably one to three rows, along the longitudinal direction on both side portions of the absorber 4. When the non-squeezed portions 11 are arranged in multiple rows on each side of the absorber 4, it is preferable that the squeezing grooves 10 of the adjacent rows are connected to each other.

As shown in FIG. 1, it is desirable that the planar shape of the non-squeezed portion 11 is circular. By making the non-squeezed portion 11 circular, there is no directionality of resistance to leg pressure, and corners and sudden changes in curvature are not formed on the outer line of the non-squeezed portion 11, so that the occurrence of twisting is particularly suppressed. Will be. Further, the non-squeezed portion 11 can be formed in an arbitrary planar shape as shown in FIG. For example, (A) not a perfect circle, but an almost circle formed by superimposing two wavy lines shifted by 1/2 wavelength, (B) rhombus, (C) triangle, (D) quadrangle, (E) heart. The shape etc. can be mentioned. In addition to this, any planar shape such as an ellipse, a polygon, a star, and a flower can be adopted as long as the pattern is surrounded by the pressing groove 10.

Further, as shown in FIG. 7, the non-squeezed portion 11 projects to either one or both of the outside and the inside of the sanitary napkin 1 in the width direction, and the opposite side in the protruding width direction is a line along the longitudinal direction. It is also possible to make a pattern formed in a shape. In this case, in order to surely increase the resistance to the leg pressure from the outside in the width direction, it is preferable to include a pattern protruding outward in the width direction. That is, the pattern protruding only outward in the width direction in FIG. 7A, and the portion protruding outward in the width direction and the portion protruding inward in the width direction of FIG. 7B are alternately formed along the longitudinal direction in a zigzag manner. It is preferable to have a shape pattern.

Further, the size of the non-squeezed portion 11 does not have to be constant, and may be changed along the longitudinal direction of the sanitary napkin 1 as shown in FIG. In FIG. 8A, the shape is small at the central portion in the longitudinal direction and gradually increases toward both ends in the longitudinal direction. As a result, when the sanitary napkin 1 is worn, the resistance to leg pressure is reduced at the central portion in the longitudinal direction, which often hits the inner portion of the base of the leg, and the discomfort can be reduced. Further, in FIG. 8B, the shape is formed so as to be large at the central portion in the longitudinal direction and gradually decrease toward both ends in the longitudinal direction. As a result, when the sanitary napkin 1 is worn, the resistance to leg pressure can be increased at the central portion in the longitudinal direction, which often hits the inner portion of the base of the leg.

Further, as a modification of the sanitary napkin 1, as shown in FIG. 9, a second squeezing groove 12 may be formed in a region that does not overlap with the region where the squeezing groove 10 is formed. In FIG. 9, the range in which the second pressing groove 12 is formed is shown by a shaded area. The position where the second squeezing groove 12 is formed differs depending on the arrangement pattern of the squeezing groove 10, but it is preferably a position where twisting due to leg pressure is likely to occur. By forming the second squeezing groove 12, the resistance force of the squeezing groove 10 can be reinforced, and the sanitary napkin 1 can be more reliably prevented from twisting. Similar to the pressing groove 10, the second pressing groove 12 may be formed in a pattern in which a plurality of non-compressed portions surrounded by the pressing groove 12 are arranged, or may be formed in a simple linear pressing groove. May be. Further, in the second squeezing groove 12, similarly to the squeezing groove 10, the absorber 4 is integrally compressed from the liquid permeable surface sheet 3 by squeezing from the outer surface side of the liquid permeable surface sheet 3. It may be formed, or it may be formed by pressing the liquid-permeable surface sheet 3 arrangement side of the absorber 4 or the liquid-permeable surface sheet 3 arrangement side of the encapsulating sheet 5 surrounding the absorber 4. It may be.

Specifically, as shown in FIG. 9A, when the squeezing groove 10 is formed so that the non-squeezed portion 11 is aligned in a straight line in the longitudinal direction, the second squeezing groove 12 is formed. It is preferable to arrange them at both ends in the longitudinal direction between the pressing grooves 10 and 10 along the width direction. As a result, the second squeezing groove 12 on the front side can prevent twisting due to leg pressure when the leg moves to the front side such as in a sitting posture, and the second squeezing groove 12 on the rear side can prevent twisting due to movement of the buttocks. Will be.

Further, as shown in FIG. 9B, when the squeezing groove 10 is formed so that the non-squeezed portion 11 bulges outward in the width direction at the central portion in the longitudinal direction, the second squeezing groove 12 becomes It is preferable that the non-squeezed portion 11 is formed outward in the longitudinal direction from the longitudinal range in which the non-squeezed portion 11 bulges outward in the width direction, and is formed outward in the width direction from the squeezing groove 10. By arranging the non-squeezed portion 11 so as to bulge outward in the width direction at the central portion in the longitudinal direction, the resistance to leg pressure in the central portion in the longitudinal direction can be increased. Further, by arranging the second pressing groove 12 on the outer side in the longitudinal direction from this, this region is reinforced and twisting can be prevented.

Further, as shown in FIG. 9C, when the squeezing groove 10 is formed so that the non-squeezed portion 11 bulges inward in the width direction at the central portion in the longitudinal direction, the second squeezing groove 12 is formed. The non-squeezed portion 11 is a central portion in the longitudinal direction that bulges inward in the width direction, and is preferably formed outside the squeezed groove 10 in the width direction. By bulging the non-squeezed portion 11 inward in the width direction at the central portion in the longitudinal direction, it is possible to reduce a sense of discomfort when wearing this region. In addition, the second squeezing groove 12 increases the resistance to leg pressure and prevents twisting.

Further, as shown in FIG. 9D, when the squeezing groove 10 is formed so that the non-squeezed portion 11 bulges inward in the width direction over the entire length, the second squeezing groove 12 becomes. It is preferably formed in the central portion in the longitudinal direction on the outer side in the width direction from the pressing groove 10. By arranging the squeezing groove 10 in this way, a feeling of strangeness at the time of wearing can be reduced. By arranging the second squeezing groove 12, the resistance to leg pressure is increased and twisting can be prevented.

1 ... Sanitary napkin, 2 ... Impermeable back sheet, 3 ... Liquid permeable front sheet, 4 ... Absorber, 5 ... Encapsulated sheet, 10 ... Squeezed groove, 11 ... Non-squeezed part, 12 ... Second Squeezing ditch

Claims (2)

In an absorbent article in which a pressing groove is formed on the skin contact surface side of the main body portion in which an absorber is interposed between the front surface sheet and the back surface sheet toward the non-skin contact surface side.
The squeezing grooves are continuously formed on both sides of the region corresponding to the body fluid discharge site along the longitudinal direction of the absorbent article, and the non-squeezing groove has a circular planar shape and is surrounded by the squeezing grooves. The portions are formed in a pattern in which a plurality of portions are arranged along the longitudinal direction of the absorbent article, and are not formed at least in the region corresponding to the body fluid discharge site .
The size of the non-squeezed portion is small at the central portion in the longitudinal direction and is formed so as to gradually increase toward both ends in the longitudinal direction, or is large at the central portion in the longitudinal direction and gradually decreases toward both ends in the longitudinal direction. An absorbent article, characterized in that it is formed in such a manner . Wherein the region which does not overlap with the region where the compression grooves are formed, the absorbent article according to claim 1 Symbol placement second compression groove is formed.

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