JP5944693B2 - Absorbent articles - Google Patents

Description

  The present invention is an absorbent article mainly used for sanitary napkins, vaginal sheets, incontinence pads, medical pads, toiletries, etc., and more specifically, the wearing position is easy to understand at a glance, and the appropriate part of the body The present invention relates to an absorbent article that can be easily attached to the body.

  Conventionally, as an absorbent article such as a panty liner, sanitary napkin, incontinence pad, a liquid-impervious back sheet such as a polyethylene sheet or a polyethylene sheet-laminated nonwoven fabric, and a liquid-permeable surface sheet such as a nonwoven fabric or a liquid-permeable plastic sheet There is known an intervening absorber made of cotton-like pulp or the like.

Many improvements have been made on this type of absorbent article, and various means for preventing body fluid leakage and the like have been taken. For example, in order to prevent diffusion of bodily fluids in the width direction, prevent twisting of the absorbent body, and raise the central portion of the absorbent body to improve adhesion to the local area, grooves are formed on the surface side by heat embossing. There are techniques to form

  For example, in Patent Document 1 below, in order to make the absorbent body bulge toward the skin at the time of wearing and to ensure excellent fit, a pair of curving convexes outward in the width direction at the excretory part facing part and its front and rear parts, respectively. Forming a groove is disclosed. Moreover, in the following patent document 2, when it wears by the user, the absorber which protruded to the skin side can be supported by the bottom face which forms the groove | channel provided in the skin contact surface side of an absorption layer. It is disclosed that a pair of grooves are provided in the side edge portion of the absorbent layer on the skin contact surface side in a predetermined shape.

Japanese Patent No. 4484765 WO2010 / 030007 Publication

  However, in the absorbent articles described in Patent Documents 1 and 2, the effect is exhibited when worn at an appropriate position with respect to the wearer's body, but when shifted from the appropriate wearing position, The absorber did not deform into an appropriate state due to body pressure, and leakage occurred or the wearing feeling deteriorated.

  Moreover, when the center part of the absorber surrounded by a pair of grooves is a raised part that protrudes toward the skin due to the compressive force from the width direction at the time of wearing, as in Patent Document 1, a large amount of When the urine is discharged, not all of the ridges can absorb the urine, and the urine flows out to both sides and sometimes leaks from the base of the buttock or the base of the leg.

  Therefore, a main object of the present invention is to provide an absorbent article that can be easily attached to an appropriate position of the body, prevents leakage, and enhances the wearing feeling.

In order to solve the above problems, as the present invention according to claim 1, an absorbent body is interposed between the liquid-permeable surface sheet and the back sheet, and the surface side of the liquid-permeable surface sheet is substantially longitudinal. In the absorbent article provided with a pair of left and right grooves along,
Said groove is constituted by a urination corresponding grooves formed on both sides of the region corresponding to the urination portion of the wearer, a front groove and a rear groove is formed in the front and rear sides of the urination corresponding groove ,
The urination corresponding groove, while being formed in a shape that bulges outward in the width direction of the absorbent article, the maximum groove spacing width spacing width is maximum between the left and right groove of the front groove and the rear groove Formed over the maximum groove separation width,
Wherein each of the front groove and the rear groove, curve having at least the portion close to the urination corresponding groove, the radius of curvature of more than longitudinal dimension of the urination corresponding groove and having a center of curvature in the width direction outer side of the absorbent article Formed in a linear or linear shape ,
An absorbent article is provided in which the groove width is formed to be relatively thicker in the portions where the urination-corresponding groove, the front groove, and the rear groove are close to each other .

In the first aspect of the present invention, the urination ports formed on both sides of the region corresponding to the urination port portion of the wearer as a pair of left and right grooves along the substantially longitudinal direction applied to the surface side of the liquid-permeable surface sheet and corresponding grooves are composed of a front groove and a rear groove is formed on the front and back. As the urination corresponding groove, thereby forming a shape that bulges outward in the width direction of the absorbent article, and forms a maximum groove spaced wider than the respective maximum groove spacing width of the front groove and a rear groove. Further, each of the front groove and the rear groove, curve having a longitudinal dimension than the radius of curvature of urination corresponding groove and having a center of curvature of the portion close to at least urination corresponding groove, outside in the width direction of the absorbent article Or linear. Therefore, the bulging shape of the urination corresponding groove becomes conspicuous stand out as compared to the shape of the front groove and the rear groove of the front and rear, urination portion of a portion surrounded by the urination corresponding groove as target By wearing so as to be in contact with the absorbent article, the absorbent article can be easily worn at an appropriate position on the body. As described above, as a result of the absorbent article being mounted at an appropriate position, it is possible to prevent the occurrence of leakage and the deterioration of the mounting feeling.

Furthermore, while the urination corresponding grooves are formed in a shape that bulges outward in the width direction of the absorbent article, the center of curvature in the width direction outer side of the front groove and the rear groove absorbent article is formed on the front and rear Since it is formed in a curved shape or a straight shape with a predetermined radius of curvature, the outer side in the width direction of the urination port-corresponding groove is a flexible shaft by the compressive force toward the inner side from the base portion of the leg when worn. While standing up toward the skin side, the central portion surrounded by the urination port-corresponding groove is deformed so that the central portion rises toward the skin side while maintaining the facing state with the urination port portion. As a result, the periphery of the urination port portion is deformed into a so-called bowl shape with the center portion surrounded by the urination port-corresponding groove as the bottom. Therefore, even if a large amount of urine is discharged suddenly, the urine does not flow out on both sides and remains in the vicinity of the urination port and is absorbed, so that leakage from the base of the buttocks or the base of the legs can be prevented.

Further, in the present invention, determination in the near portion of the urination corresponding groove and the front groove and a rear groove, by relatively thick form the line width of the groove lines than other portions, the urination corresponding groove as target It is easy to do.

As an aspect of the present invention according to claim 2, there is provided the absorbent article according to claim 1, wherein the urination opening corresponding groove is formed in an arc shape having a center at a center portion in the width direction of the absorbent article.

In the invention described in claim 2, as well as easily recognize the urination corresponding groove as manner at first glance, to the peripheral urination portion easily deformed into a bowl-type described above, the urination corresponding grooves of the absorbent article It forms in the circular arc shape which has a center in the width direction center part.

As the present invention according to claim 3, wherein each at the portion where the urination corresponding groove and the front groove and the rear groove are close to being formed as spaced width between the right and left grooves becomes minimum, the minimum groove spacing width The absorbent article according to any one of claims 1 and 2 , wherein is a half or less of the width of the absorber.

In the invention described in claim 3, each adjacent portion of the urination corresponding groove and the front groove and a rear groove is formed in the minimum groove spacing width to the minimum groove spacing width less than half of the absorbent width In this way, it is formed into a bowl shape with an appropriate depth with the center portion sandwiched between the urination opening-corresponding grooves as the bottom surface, so that more urine can be received.

As the present invention according to claim 4, wherein the rear groove, the urination in the region of the longitudinal center than 80mm or more rear of the corresponding groove, the maximum groove spacing width equivalent to the groove spacing and the urination corresponding groove The absorbent article according to any one of claims 1 to 3 , wherein the absorbent article is formed with a width.

In the invention described in claim 4, wherein, as the rear groove, formed in the longitudinal center in the region of 80mm or more rear than the maximum groove spaced width equivalent to the groove spacing width of urination corresponding groove of urination corresponding groove By doing so, it is possible to prevent the diffusion within the absorbent body from being restricted by the groove portion and prevent the absorption speed from being lowered, and to absorb in a wider range.

As the present invention according to claim 5, wherein the front groove and the rear groove, when subtracting the virtual line is continuously them, forming the imaginary line in a curved shape having a curvature center outside in the width direction of the absorbent article The absorbent article according to any one of claims 1 to 4 , wherein the urination port-corresponding groove is formed in a portion where the separation width between the left and right virtual lines is minimized.

In the invention described in claim 5, wherein, when drawn to an imaginary line were continuous front groove and a rear groove, that the imaginary line is formed in a curved shape having a curvature center outside in the width direction of the absorbent article as a whole By urinating to the part corresponding to the part where the separation width between the left and right virtual lines is the smallest, that is, the part where the crotch part of the shorts is the narrowest, A mouth-corresponding groove is formed. For this reason, the absorber is easily deformed along the body, and the position of the urination port is made easier for the user to understand.

  As described above in detail, according to the present invention, it is possible to easily attach to an appropriate position of the body, to prevent leakage, and to enhance the feeling of wearing.

It is a partially broken development view of the light incontinence pad 1 according to the present invention. It is the II-II arrow directional view. (A) is a view taken along line II-II in FIG. 1, (B) is a view taken along line III-III in FIG. 1, and (C) is a case where the groove separation width is too large. FIG. 3 is a view taken along the line III-III in FIG. 1, and (D) is a view taken along the line III-III in FIG. 1 when the groove separation width is too small. It is a top view which shows the other example of a form of the urination opening corresponding | compatible groove | channel 21. FIG. It is a schematic view showing a connecting portion between urination corresponding groove 21 and the rear groove 23. 6 is a plan view showing another example of the groove 20. FIG. FIG. 6 is a development view of a light incontinence pad 1 showing another example of a groove 20. It is a top view which shows the other example of a form of the urination opening corresponding | compatible groove | channel 21. FIG. 6 is a plan view showing another example of the groove 20. FIG. 6 is a plan view showing another example of the groove 20. FIG. It is sectional drawing which shows the other form example of solid gather BS.

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

  As shown in FIGS. 1 and 2, the light incontinence pad 1 according to the present invention includes a liquid-impervious back sheet 2 made of a polyethylene sheet, a polypropylene sheet, and the like, and a liquid-permeable top sheet that allows urine to permeate quickly. 3 and an absorbent body 4 made of cotton-like pulp or synthetic pulp interposed between the two sheets 2 and 3, and a crepe surrounding the absorbent body 4 in order to maintain the shape and improve the diffusibility of the absorbent body 4. A second sheet 6 made of a hydrophilic non-woven fabric interposed between the paper 5, the liquid-permeable surface sheet 3 and the crepe paper 5, and side non-woven fabrics 7 and 7 formed on both sides of the surface along the longitudinal direction. It consists of and. Around the absorber 4, at the upper and lower edge portions, the outer edge portions of the liquid-impermeable back sheet 2 and the liquid-permeable surface sheet 3 are bonded by an adhesive such as hot melt or a bonding means such as thermocompression bonding. In addition, the liquid-impervious back sheet 2 and the side nonwoven fabric 7 which extend laterally from the absorbent body 4 at both side edges thereof are bonded by an adhesive such as hot melt or a bonding means such as thermocompression bonding. Has been.

Hereinafter, the structure of the light incontinence pad 1 will be described in detail.
As the liquid-impermeable back sheet 2, a sheet material having at least water shielding properties such as an olefin resin sheet such as polyethylene or polypropylene is used. In addition, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or A nonwoven fabric sheet (in this case, the waterproof film and the nonwoven fabric constitute a liquid-impervious back sheet) can be used after substantially impervious to liquid imperviousness by interposing a waterproof film. In recent years, those having moisture permeability tend to be used from the viewpoint of preventing stuffiness. This water- and moisture-permeable sheet material is a microporous sheet obtained by forming a sheet by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, and then stretching in a uniaxial or biaxial direction. It is.

As the liquid-permeable surface sheet 3, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. Examples of the material fibers constituting the nonwoven fabric include synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a lace method, a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. A groove 20 having a depth reaching the absorber 4 is provided on the surface side of the liquid-permeable surface sheet 3. This groove structure will be described in detail later.

  The absorbent body 4 interposed between the liquid-impervious back sheet 2 and the liquid-permeable top sheet 3 is made of, for example, fluffy pulp and a water-absorbing polymer. The water-absorbing polymer is mixed in the pulp constituting the absorber, for example, as granular powder. Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolved pulp, and artificial cellulose fibers such as rayon and acetate. Softwood pulp having a longer fiber length than hardwood pulp functions and It is preferably used in terms of price. When the crepe paper 5 surrounding the absorbent body 4 is provided as in this example, the crepe paper 5 is interposed between the liquid-permeable surface sheet 3 and the absorbent body 4 as a result. The crepe paper 5 which is excellent in diffusing body fluid quickly diffuses and prevents the urine and the like from returning.

  The absorbent body 4 may be mixed with synthetic fibers. As the synthetic fiber, for example, polyolefins such as polyethylene or polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used. It may be a mixture. In addition, a composite fiber such as a core-sheath fiber, a side-by-side fiber, or a split fiber having a fiber having a high melting point as a core and a fiber having a low melting point as a sheath can also be used. In the case of a hydrophobic fiber, it is desirable to use a synthetic fiber that has been surface-treated with a hydrophilizing agent so as to have an affinity for body fluids.

  The second sheet 6 made of a hydrophilic nonwoven fabric can be made of, for example, synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, or a needle punch method can be used. In order to impart hydrophilicity, a method of polymerizing a compound having a hydrophilic group, for example, an oxidation product of polyethylene glycol, in the process of producing a synthetic fiber, or treatment with a metal salt such as stannic chloride, Synthetic fibers can be made to swell or become porous by a method such as partially dissolving the surface to make it porous and depositing metal hydroxide, etc., and applying capillary action to impart hydrophilicity. Such a second sheet 6 may be disposed at a central portion in the pad width direction with a predetermined width and almost the entire length in the pad longitudinal direction as shown in the illustrated example, or a predetermined length in the pad longitudinal direction (for example, the absorber 4). (Length in the longitudinal direction). Furthermore, it may be disposed so as to cover almost the entire surface side of the absorbent body 4, or may be disposed so as to surround the front surface side and the back surface side of the absorbent body 4.

  The side nonwoven fabric 7 has an inwardly folded inner portion, and a double elastic sheet 14 in which a suitable position in the both ends or the longitudinal direction is fixed to the middle portion in the height direction. , And a plurality of thread-like elastic stretch members 15 are disposed on the upper portion of the thread-like elastic stretch member 14 in a state where both ends or appropriate positions in the longitudinal direction are fixed, and a standing base end portion. A thread-like elastic stretchable member 16 is disposed at both ends or at appropriate positions in the longitudinal direction. The double sheet portion is folded at the front and rear end portions and bonded to the absorbent body 4 side in a state of being folded and laminated in a Z-shaped cross section, so that the section where the thread elastic elastic member 14 is disposed is a bending point. Solid gathers BS and BS standing on the surface side are formed while forming pockets P and P with openings facing inward.

  On the non-skin contact surface of the main body portion where the absorbent body 4 is interposed between the liquid-permeable top sheet 3 and the liquid-impervious back sheet 2, a plurality of strips are formed by an appropriate application pattern for fixing to the underwear. The main body misalignment prevention adhesive layer (not shown) is formed, and these main body misalignment prevention adhesive layers are covered with a main body release material (not shown).

( Groove structure)
In this light incontinence pad 1, as shown in FIG. 1, the urination port corresponding grooves 21 formed on both sides of the region H corresponding to the urination port portion of the wearer, and the front side and the rear side of the urination port corresponding groove 21 groove 20 consists of the front groove 22 and the rear groove 23 is formed on the side is formed by the left and right so that closure circumferentially long and across the pad longitudinally. Thus, the region surrounded by the groove 20 includes a central region 24 sandwiched by the urination corresponding grooves 21 and 21, a front region 25 which is surrounded on three sides by the front groove 22, the three-way at the rear groove 23 And a rear region 26 surrounded by

The urination port corresponding groove 21 is formed in a shape that bulges outward in the width direction of the light incontinence pad 1, and the maximum groove separation width WH that maximizes the separation width between the left and right urination port corresponding grooves 21, 21 is the front side. They are formed over equal for each of the maximum groove spacing width WB of the maximum groove spacing width WF and the rear groove 23 of the groove 22. The relationship between the maximum groove spacing width WB of the maximum groove spaced width WF and the rear groove 23 of the front groove 22 has been almost equally formed in the illustrated example, the rear groove so as to fit the cleft of the buttocks it is also possible to the maximum groove spacing width WB of 23 relatively smaller than the front groove 22 (see FIG. 6 (B)).

Further, each of the front groove 22 and the rear groove 23, the portion to be connected to at least urination corresponding groove 21, at least the longitudinal dimension L of urination corresponding groove 21 and having a center of curvature in the width direction outer side of the light incontinence pad 1 It is formed in a curved line shape or a straight line shape (R = ∞) having a curvature radius R (R ≧ L).

Therefore, now shape bulged outside the urination corresponding grooves 21 stand out conspicuously in comparison with the shape of the front and rear of the front groove 22 and the rear groove 23, sandwiched between the urination corresponding grooves 21 and 21 The light incontinence pad 1 can be mounted at an appropriate position on the body by mounting the central region 24 so as to be in contact with the urination port of the wearer. Thus, as a result of mounting the light incontinence pad 1 at an appropriate position, it is possible to prevent the occurrence of leakage and the deterioration of the mounting feeling.

Furthermore, urination corresponding groove 21 while being formed in a shape that bulges outward in the width direction of the light incontinence pad 1, the width direction of the front groove 22 and the rear groove 23 is formed around the light incontinence pad 1 Since it is formed in a curved or linear shape having a predetermined radius of curvature R having a center of curvature on the outer side, as shown in FIG. Due to the pressure inward from the base portion of the urine, the urination port corresponding grooves 21 and 21 are used as flexible shafts so that the outer side in the width direction from the urination port corresponding groove 21 rises toward the skin side, and from the shorts front portion and rear portion from urination port corresponding groove 21 as a base point a partial radius of curvature suddenly changes the connection portion between the urination corresponding groove 21 and the front groove 22 and the rear groove 23 by pressure along the shape of the body of While deformed, the central area 4 the central portion by the pressure from both sides while maintaining the face-to-face condition of the urination portion is deformed so as to bulge toward the skin side. Further, the pad width direction cross-sectional view of the connection of the urination corresponding groove 21 and the front groove 22, as shown in FIG. 3 (B), the inter-grooves are formed narrower than the urination center Therefore, while maintaining a substantially planar shape, the outer portion in the width direction is deformed so as to stand up toward the skin side by leg pressure from both sides between the grooves . As a result, the periphery of the urination port is deformed into a bowl shape. Therefore, even if a large amount of urine is discharged suddenly, the urine does not flow out on both sides or back and forth but remains in the central region 24 and is absorbed, so that leakage from the base of the buttocks or the base of the legs can be prevented. Become.

The urination port-corresponding groove 21 is easy to recognize as a target at first glance, and has a center of curvature at the center in the width direction of the light incontinence pad 1 so that the periphery of the urination port can be easily deformed into the bowl shape when worn. It is preferable to form in the shape of a circular arc. For example, when the urination opening corresponding groove 21 is formed in an elliptical shape that is long in the longitudinal direction of the pad, the pressure from both sides does not act on the central region 24 evenly. In addition to being bent at the middle part in the direction, it is difficult to be deformed into the bowl shape described above, and the center effect is unclear, so the target effect is reduced.

Maximum groove spacing width WH of urination corresponding grooves 21 and 21 and described above the front groove 22 and the maximum groove spaced width WH equal or rear groove 23 is preferably formed at about 40～70Mm. Moreover, it is preferable to form so that the separation distance D of the urination opening corresponding groove | channel 21 and the inner side edge part of the side nonwoven fabric 7 of both sides may be set to about 2-10 mm. By forming in this range, the visibility of the urination port corresponding groove 21 can be enhanced, and the periphery of the urination port portion is easily deformed into the above bowl shape when worn.

Connecting portion between the urination corresponding groove 21 and the front groove 22 and the rear groove 23 is formed at the minimum groove spacing width Wmin spaced apart the width between the right and left grooves becomes minimum, section constriction in this portion is formed It is like that. This minimum groove separation width Wmin is preferably formed to be not more than 1/2 of the length of the absorber 4 in the pad width direction (absorber width), preferably about 1/2 to 1/3. When the minimum groove separation width Wmin is larger than ½ of the absorber width, the target distinctiveness is lowered, and as shown in FIG. 3 (C), the central portion between the grooves is raised to the skin side. Even if it is deformed to the above-mentioned bowl shape, it becomes a bowl shape with a very shallow bottom, and the urine receiving capacity is reduced, so that urine tends to flow out to both sides. On the other hand, if the minimum groove separation width Wmin is made smaller than 1/3 of the absorber width, the distinction as a target is increased, but as shown in FIG. Adhesion decreases. Therefore, by forming the minimum groove separation width Wmin in the above range, the urination port-corresponding groove 21 becomes clear as a target, and at the time of wearing, it is transformed into a bowl having an appropriate depth with the central region 24 as the bottom surface, It becomes possible to catch more urine and improve the adhesion to the skin.

In addition to the curved shape and the circular shape, the urination port-corresponding groove 21 can be formed in a polygonal shape such as (A) square, (B) triangle, or polygon as shown in FIG. is there. Even in the case of such a bent linear shape, the planar shape when the urination port corresponding groove 21 is extended to the central portion in the width direction so that the pressure from both sides acts evenly on the central region 24 is a regular square or a regular multiple. It is preferable to form a square shape. Even in the case of such a bent linear shape, it is preferable to form within the numerical ranges of the aforementioned maximum groove separation width WH and separation distance D.

Further defining the connection portions with another urination terms corresponding groove 21 and the front groove 22 and the rear groove 23, FIG. 5 is a schematic view showing a connecting portion between urination corresponding groove 21 and the rear groove 23 . The urination corresponding grooves 21 and one circle, when an arcuate rear groove 23 having a center of curvature outside the pad width direction on the rear side of the urination corresponding groove 21 is connected, the rear groove 23 The vertex 23a on the inner side in the pad width direction on the left and right sides is a quarter arc line on the rear left and right sides when the urination port corresponding groove 21 is divided into four equal parts in the pad width direction and the longitudinal direction, that is, the urination port corresponding groove. 21 crosses inside the apex 21a outside the pad width direction. That is, a line F drawn toward the intersection 23a of the rear side groove 23 from the center of curvature of urination corresponding groove 21, the angle alpha is 0 ° the pad longitudinal centerline CL <α <90 °, preferably It is preferable to form within a range of 22.5 ≦ α ≦ 67.5 °. The same applies to the front groove 22. Thus, the connection portion between the urination corresponding groove 21 and the front groove 22 and the rear groove 23 is easily bent more by the body pressure.

And in the connecting portion between the urination corresponding groove 21 and the front groove 22 and the rear groove 23, it is preferable to relatively thick form the line width of the groove lines than other portions. As a result, the urination opening corresponding groove 21 can be easily and clearly discriminated and the mounting position can be easily confirmed. The degree of increasing the line width is preferably about 1.5 to 3 times the line width of other portions.

Then, rear grooves 23, as shown in FIG. 1, extends substantially in the pad longitudinally continuously from the rear end of the urination corresponding groove 21, by connecting the left and right of the groove at its rear end An elongated rear region 26 is defined at the center in the pad width direction. The rear end of the rear groove 23 is formed in about 10mm inward from the rear end of the absorbent body 4. Since there is a base of the buttock in the vicinity of 70 mm on the rear side from the longitudinal center of the urination opening corresponding groove 21, and usually leakage often occurs from this part, up to the range including this part of the crotch part of the shorts It is preferable to form a curved line having a center of curvature on the outer side in the pad width direction in accordance with the outline.

Further, the rear groove 23, in the region of the longitudinal center than 80mm or more rear urination corresponding groove 21, thereby forming linearly along the pad lengthwise direction, the rear side the straight portion formed Preferably, the groove 23 is formed to have the maximum groove separation width WB, and the maximum groove separation width WB is formed to be equal to the maximum groove separation width WH of the urination opening corresponding groove 21. Accordingly, in the region on the rear side from the base of the buttock, the diffusion inside the absorbent body is restricted by the groove squeezing to prevent the absorption speed from being lowered, and the absorbent body can be absorbed in a wider range.

Rear groove 23, as shown in FIG. 6, from (A) may be formed by were spaced shape without connecting the rear end, (B) connecting portions of the urination corresponding groove 21 You may form in the back side substantially linear form.

On the other hand, the front groove 22, as shown in FIG. 1, extends substantially in the pad longitudinally continuously from the front end of the urination corresponding groove 21, the semi-arcuate groove lines left and right of the groove at its front end By connecting, an elongated front region 25 is defined at the center in the pad width direction. The front end of the front groove 22 is formed in about 10mm inward from the front end of the absorbent body 4. In the example shown in FIG. 1, the front groove 22, from the front end of the urination corresponding grooves 21, by forming by a curve having a center of curvature outside the pad width direction, gradually, the groove spacing width is enlarged toward the front side is formed in a shape, and has a maximum groove spaced width WF at its ends, it is formed in a substantially semicircular groove from front side which connects the left and right of the front groove 22, 22. Similarly to the rear groove 23, may be formed in a linear shape, it may be formed by curved and straight combinations.

Curve the front groove 22 and the rear groove 23, when drawn an imaginary line S that is continuously them as shown in Figure 7, the virtual line S is having a center of curvature in the width direction outer side of the light incontinence pad 1 The urination port corresponding groove 21 can be formed in a portion that is formed in a shape and has the smallest separation width between the left and right virtual lines S. The front groove 22 and the rear groove 23 by forming with the virtual line S, is conformally formed and outline of the crotch portion of the shorts, the portion corresponding to the portion where the crotch portion of the shorts is most narrow Since the urination port-corresponding groove 21 is formed, the pad is easily deformed along the body, more easily fits to the body, and the position of the urination port is more easily understood by the user.

By the way, the urination outlet corresponding groove 21 is provided as a pair of left and right spaced apart at the center portion in the width direction so that the urine discharged to the center region 24 can be easily diffused in the pad longitudinal direction. The diffusion is suppressed by the groove . On the other hand, in order to increase the visibility as a target at the time of wearing even if the diffusibility in the longitudinal direction of the pad is somewhat sacrificed, the urination opening corresponding groove 21 is extended to the center in the pad width direction to surround the pad. It is also possible to form in a shape such as a circle, a rectangle, or a polygon that closes in the direction.

Further, in order to make the urination port corresponding groove 21 more prominent and enhance the target effect, as shown in FIG. 8, a second fit groove 27 is provided outside the urination port corresponding groove 21, and only this region is provided. may be a double groove line, as shown in FIG. 9, the groove bottom portion of the pattern that will be formed by the high compression portion 28 and the low compression portion 29, so as to vary only a portion of the urination corresponding groove 21 It may be. The planar shape of the high compression portion 28, FIG. 9 (A) semi-circular, and circular in the FIG. 9 (B), the form what is formed in each urination corresponding groove 21 to the front groove 22 and the rear groove 23 It is relatively larger than what is done.

[Other examples]
(1) In the above embodiment, as has been to form a front groove 22 and the rear groove 23 in succession before and after urination corresponding groove 21, shown in FIG. 10, before and after urination corresponding groove 21 apart may form a front groove 22 and the rear groove 23. At this time, it is preferable to form the design groove 30 in an arbitrary shape such as a V shape in order to make the urination port corresponding groove 21 stand out on the outside of the separation portion.
(2) Although the light incontinence pad has been described as an example in the above embodiment, the present invention can be similarly applied to other absorbent articles such as sanitary napkins, panty liners, and medical pads.
(3) In the above-described embodiment, the three-dimensional gather BS is formed in a shape bent in a cross-sectional shape, but as shown in FIG. Is folded back to the outside in the pad width direction on the inward side, and the base end on the upper layer side is bonded to the lower layer side with the end on the upper layer side positioned inward from the end on the lower layer side. Adhering to the absorbent body 4 side with the end portion extending outward from the side edge of the liquid-impervious back sheet 2, and to the upper layer side end portion inside the double sheet, both ends or in the longitudinal direction as appropriate 1 or more, in the illustrated example, one thread-like elastic elastic member 17 is disposed, and appropriate positions in both ends or in the longitudinal direction are fixed to the lower layer side end. One or a plurality of elastic elastic members 18, 18 in the illustrated example are arranged. By Rukoto it may be formed in a shape standing on the front surface side in a double linear.

DESCRIPTION OF SYMBOLS 1 ... Light incontinence pad, 2 ... Impervious back sheet, 3 ... Impervious surface sheet, 4 ... Absorber, 5 ... Crepe paper, 6 ... Second sheet, 7 ... Side nonwoven fabric, 20 ... Groove , 21 ... Urination mouth corresponding groove, 22 ... front groove, 23 ... rear groove 24 ... center area, 25 ... front region, 26 ... rear region

Claims (5)

In the absorbent article in which an absorbent body is interposed between the liquid-permeable surface sheet and the back sheet, and a pair of left and right grooves along the substantially longitudinal direction is provided on the surface side of the liquid-permeable surface sheet,
Said groove is constituted by a urination corresponding grooves formed on both sides of the region corresponding to the urination portion of the wearer, a front groove and a rear groove is formed in the front and rear sides of the urination corresponding groove ,
The urination corresponding groove, while being formed in a shape that bulges outward in the width direction of the absorbent article, the maximum groove spacing width spacing width is maximum between the left and right groove of the front groove and the rear groove Formed over the maximum groove separation width,
Wherein each of the front groove and the rear groove, curve having at least the portion close to the urination corresponding groove, the radius of curvature of more than longitudinal dimension of the urination corresponding groove and having a center of curvature in the width direction outer side of the absorbent article Formed in a linear or linear shape ,
The absorbent article, wherein the groove-corresponding groove, the front groove, and the rear groove are formed so that the line width of the groove line is relatively thicker than that of the other part . The absorbent article according to claim 1, wherein the urination opening corresponding groove is formed in an arc shape having a center at a center portion in the width direction of the absorbent article. Each in a portion where said urination corresponding groove and the front groove and the rear groove are close to being formed as spaced width between the right and left grooves becomes minimum, the minimum groove spacing width not exceeding half of the absorber width The absorbent article according to any one of claims 1 and 2 . The rear groove, the urination in the region of the longitudinal center than 80mm or more rear of the corresponding groove, claim 1, which is formed at the maximum groove spaced width equivalent to the groove spacing width of the urination corresponding groove -Absorbent article in any one of 3 . The front groove and the rear groove, when subtracting the virtual line is continuously them, this virtual line is formed in a curved shape having a curvature center outside in the width direction of the absorbent article, spaced between the left and right virtual line The absorbent article according to any one of claims 1 to 4 , wherein the urination opening-corresponding groove is formed at a portion where the width is minimized.

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