JP6306396B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article.

  Absorbent articles of the type that are attached to the inside of underwear or the inside of a diaper or diaper cover to mainly absorb urine are known. Among these types of absorbent articles, for example, in Patent Document 1, in Patent Document 1, the front part of the absorbent article is curved to the topsheet side, and both side edges of the front part are raised to the topsheet side. It is described that a cup-shaped recess is formed in the front portion of the urination position of the wearer.

  Patent Document 2 also describes that both sides of the front body of the absorbent article are raised by bending the front sheet inside to form a urine storage space.

JP-A-5-200059 JP-A-2005-52218

  As described above, in this type of conventional absorbent article, a structure for blocking the lateral flow of excreted urine is provided at the front portion in the longitudinal direction of the article. However, since the damming structure is formed by one kind of gathers, the damming structure may not be reliably formed. Moreover, even if the damming structure is formed only at the front part, it is not easy to reliably prevent urine leakage from the rear part.

  Therefore, the subject of this invention is providing the absorbent article which can eliminate the fault which the prior art mentioned above has.

The present invention has a longitudinal direction and a width direction perpendicular thereto,
A central region located at the center in the longitudinal direction, and a front region and a rear region extending from the central region to the front and rear in the longitudinal direction,
A topsheet, a backsheet, and an absorbent article disposed between both sheets and having an absorber,
The first elastic member is arranged in a stretched state on both sides of the article in the width direction over at least the region where the absorber exists in the longitudinal direction of the article,
The second elastic member extending in the longitudinal direction is disposed in both sides of the article in the width direction only in a position where it overlaps with the front region and the thickness direction,
The second elastic member is located closer to the back sheet than the absorber,
A core material extending along the longitudinal direction is disposed at the center of the absorbent body in the width direction,
The core material does not contain a superabsorbent polymer,
The said core material is located in the said back sheet side rather than the said absorber, and provides the absorbent article located in the area | region where the said 2nd elastic member is arrange | positioned at least in the longitudinal direction. is there.

  ADVANTAGE OF THE INVENTION According to this invention, the fitting property in a front area improves and the absorbent article by which urine leakage was suppressed effectively is provided.

FIG. 1 is a perspective view showing an embodiment of the absorbent article of the present invention. 2A is a plan view of the absorbent article shown in FIG. 1 viewed from the top sheet side, and FIG. 2B is a plan view of the absorbent article shown in FIG. 1 viewed from the back sheet side. FIG. FIG. 3 is a cross-sectional view taken along line IV-IV in FIG. 4 is a cross-sectional view taken along line III-III in FIG. FIG. 5 is a schematic exploded perspective view of the absorbent article shown in FIG. 1. 6 (a) to 6 (d) are cross-sectional views in the width direction of the core material in the absorbent article shown in FIG. FIG. 7 is a schematic exploded perspective view (corresponding to FIG. 5) showing another embodiment of the absorbent article of the present invention. FIG. 8 is a cross-sectional view (corresponding to FIG. 3) showing still another embodiment of the absorbent article of the present invention.

  The present invention will be described below based on preferred embodiments with reference to the drawings. The absorbent article 10 of the embodiment shown in FIGS. 1 and 2 is suitably used as, for example, an incontinence pad, and is a vertically long article having a longitudinal direction X and a width direction Y orthogonal thereto. The absorbent article 10 has a central area C located at the center along the longitudinal direction X thereof. Moreover, it has the front area A and the back area B which each extend before and after the longitudinal direction X from the center area C. The front area A is a part located on the abdomen side of the wearer when the absorbent article 10 is worn. The rear region B is a part located on the back side of the wearer in a state where the absorbent article 10 is worn. The center area C is located in the center when the absorbent article 10 is divided into three equal parts along the longitudinal direction. The front area A and the rear area B are parts that are adjacent to the central area C and located at end portions along the longitudinal direction X when the absorbent article 10 is divided into three equal parts along the longitudinal direction.

  A top sheet 11, a back sheet 12, and an absorber 13 are provided. The topsheet 11 is located on the surface side facing the wearer's skin when the absorbent article 10 is worn. The back sheet 12 is located on the side far from the wearer's skin when the absorbent article 10 is worn. The top sheet 11 is liquid permeable. The back sheet 12 is liquid-impermeable or liquid-impermeable. An adhesive (not shown) or a hook-and-loop fastener for fixing the absorbent article 10 to the inner surface of the underwear, the diaper or the diaper cover may be applied to the outer surface of the back sheet 12. When this pressure-sensitive adhesive is applied, it is preferable to protect the pressure-sensitive adhesive by covering it with a protective sheet (not shown) subjected to a release treatment until the absorbent article 10 is used. Moreover, when the male material of a hook-and-loop fastener is given, this male material may be covered and protected by the female material of the hook-and-loop fastener until the absorbent article 10 is used.

  As the top sheet 11 and the back sheet 12, the same materials as those conventionally used for this type of absorbent article can be used. For example, as the surface sheet 11, a nonwoven fabric or a perforated film having liquid permeability can be used. As the back sheet 12, a synthetic resin film that is liquid impermeable, a nonwoven fabric that is liquid impermeable, or the like can be used. Or the laminated sheet material of the film made from the synthetic resin which is liquid-impermeable, and a nonwoven fabric can also be used.

  An absorber 13 is disposed between the top sheet 11 and the back sheet 12. The absorber 13 is liquid retaining. The top sheet 11 and the back sheet 12 extend outward from the periphery of the absorber 13, and the extension portions of these sheets are joined to each other so that the absorber 13 is sandwiched between these sheets. . The absorber 13 has the absorptive core 14 which is a main liquid holding part. For the absorbent core 14, for example, a hydrophilic fiber material, for example, a laminate of cellulosic fibers such as fluff pulp, or a mixed laminate of the hydrophilic fiber material and a superabsorbent polymer such as a hydrogel material is used. Can do. The absorbent core 14 may be partly or entirely covered with a core wrap sheet made of a liquid permeable sheet such as tissue paper to form the absorbent body 13. In this embodiment, as shown in FIG.3 and FIG.4, the core wrap sheet | seat 23 is distribute | arranged only to the surface sheet 11 side of the absorptive core 14, and the absorber 13 is formed, and this core wrap sheet | seat 23 is width direction. In Y, it has the same width as the core center region 14C described later, and the overhanging portion 17 is not covered with the core wrap sheet 23.

It is preferable that the absorbent body 13 is thin so as not to cause a sense of incongruity when the absorbent article 10 is mounted. For example, the thickness of the absorber 13 under a pressure of 196 cN / cm ² is preferably 5 mm or less, more preferably 4 mm or less, and even more preferably 3 mm or less. The lower limit value of the thickness is preferably 1.5 mm. When the absorbent core 14 in the absorbent body 13 includes a hydrophilic fiber material and a superabsorbent polymer, the basis weight of the fiber material is preferably 100 g / m ² or more and 240 g / m ² or less, and 120 g / m ^2. and still more preferably m is ² or more 220 g / ^{m 2} or less. On the other hand, the basis weight of the superabsorbent polymer, more preferably it is 40 g / ^{m 2} or more 150 g / ^{m 2} or less is preferable, 40 g / ^{m 2} or more 120 g / ^{m 2} or less.

  A core material 15 is disposed on the lower surface side of the absorber 13. Specifically, the core material 15 is disposed between the absorber 13 and the back sheet 12. The core material 15 is disposed along the longitudinal direction X at the center position in the width direction Y of the absorber 13. The core material 15 is a member used to impart rigidity to the absorbent article 10. The core material 15 is comprised from the nonwoven fabric which has air permeability, such as a hydrophilic sheet material, a chemical bond nonwoven fabric, an air through nonwoven fabric, or an airlaid nonwoven fabric, a plastic thin plate, etc., for example. It is preferable that the core material 15 is made of a non-woven fabric having air permeability since the occurrence of stuffiness is effectively suppressed when the absorbent article 10 is worn. The core material 15 is preferably made of a hydrophilic sheet material in view of easiness of forming wrinkles described later. This sheet material includes a hydrophilic fiber material, for example, a cellulosic fiber such as fluff pulp, and may be a papermaking body manufactured by a wet papermaking method or a dry airlaid method. In particular, when the sheet material is a papermaking body, in particular, a papermaking body by a wet papermaking method, an appropriate rigidity is exhibited in the core material 15, so that the core material 15 will be described later when the absorbent article 10 is worn. Can successfully form folds.

When the core material 15 is made of the sheet material, the basis weight thereof is preferably 10 g / m ² or more and 80 g / m ² or less, and more preferably 13 g / m ² or more and 60 g / m ² or less. The thickness is preferably 0.2 mm or more and 2 mm or less. The thickness can be measured by using Ozaki Manufacturing Co., Ltd. dial gauge (Peacock model number: No. 207) or the like under 196 cN / cm ² . In this case, an acrylic plate having a length of 36 mm, a width of 36 mm, and a thickness of 3 mm is placed between the sample to be measured and the thickness gauge to perform measurement. The bending stiffness of the sheet material is preferably 5.0 cN or more and 200 cN or less as measured by a handometer (slit width 20 mm, sample size 200 mm × 200 mm). As the handometer, model number P360A manufactured by Daiei Kagaku Seiki Seisakusho can be used.

  The core material 15 is advantageously free of superabsorbent polymer. Because the core material 15 does not contain the superabsorbent polymer, the change in the partial rigidity of the core material 15 is small even when urine is absorbed during product use. The bending of the core material 15 that is not intended can be effectively suppressed, and the fit of the absorbent article 10 is improved.

  The sheet material can be used in one sheet or in a multilayer structure in which two or more sheets are overlapped. In the embodiment shown in FIGS. 3 and 4, the core member 15 has a multilayer structure in which one sheet member is folded in three, and a plurality of sheets are superposed. Specifically, the sheet material constituting the core material 15 has a first direction that coincides with the longitudinal direction X and a second direction that is orthogonal to the longitudinal direction and coincides with the width direction Y, and a pair of sides along the first direction. It is comprised from the rectangular sheet | seat material which has an area. The core material 15 is configured by folding the sheet material in three along the first direction, that is, the longitudinal direction X so that both side regions overlap. By using such a core material 15, when an external force is applied from the outside in the width direction Y to the inside in the wearing state of the absorbent article 10, the width direction extends in the longitudinal direction of the core material 15. The overhanging portion 17 is easily bent in the width direction Y starting from the end edge. As a result, the fit of the absorbent article 10 is improved.

  The core material 15 and the absorbent body 13 (specifically, the core wrap sheet disposed on the back sheet 12 side of the absorbent core 14 or the absorbent core 14 when no core wrap sheet is present) are joined. Or may be in a non-bonded state. When both are in a non-bonded state, when the absorbent article 10 is deformed in the worn state of the absorbent article 10, the core material 15 is stretched along the width direction Y and in the longitudinal direction X. This is preferable because bellows-like wrinkles extending to The formation of the ridge is advantageous because it contributes to increasing the rigidity of the core material 15. In particular, it is preferable that the core material 15 is tri-folded so that both side regions overlap each other, since the core material 15 is easily bent into a bellows shape starting from the overlapped portion, so that wrinkles are easily formed. When the absorbent article 10 is a male incontinence pad, the front area A corresponds to a male genital part, and the rear area B corresponds to a crotch part. Therefore, in the crotch portion, the rear region B hangs down due to gravity, and a gap is easily generated between the wearer and the wearer. On the other hand, when the core material 15 forms the above-mentioned ridges and the rigidity is increased, the rear region B is prevented from sagging, and the gap between the crotch part and the wearer's body is reduced, and the absorbency is reduced. The fit of the article 10 is improved.

  The absorbent article 10 includes a pair of leak-proof cuffs 16 extending in the longitudinal direction X at positions on both sides in the width direction Y on the surface sheet 11 side. The leak-proof cuff 16 has a sheet material 16 </ b> A extending in the longitudinal direction X. As shown in FIGS. 3 and 4, the sheet material 16 </ b> A has a side region located on the outer side in the width direction Y among the pair of side regions extending in the longitudinal direction X and is joined to the topsheet 11. . Further, in the sheet material 16A, elastic members 16B are arranged in a stretched state along the side edge at the position of the side edge of the side region located on the inner side in the width direction Y. Thereby, a non-joining part with surface sheet 11 stands up by contraction of elastic member 16B among sheet materials 16A, and liquid resistance leak-proof cuff 16 is formed. The leak-proof cuff 16 extends in at least the region where the absorbent body 13 exists in the longitudinal direction X of the absorbent article 10. Accordingly, the sheet material 16 </ b> A and the elastic member 16 </ b> B also extend over at least the region where the absorbent body 13 exists in the longitudinal direction X of the absorbent article 10. As the sheet material 16A, for example, a liquid non-permeable nonwoven fabric or the like can be used.

  The absorbent core 14 in the absorbent body 13 described above is disposed over substantially the entire length of the absorbent article 10, preferably 80% to 90% of the full length, and has an outline in plan view of the absorbent body 13. Yes. And corresponding to the absorbent article 10 being divided into the front area A, the central area C, and the rear area B, the absorbent core 14 is also divided into the core front area 14A, the core central area 14C, and the core rear area 14B. It is divided. The core front region 14 </ b> A is a region located in the front region A of the absorbent article 10 in the absorbent core 14. The core central region 14 </ b> C is a region located in the central region C of the absorbent article 10 in the absorbent core 14. Similarly, the core rear region 14B is a region located in the rear region B of the absorbent article 10 in the absorbent core 14.

  The core front region 14A, the core central region 14C, and the core rear region 14B are continuous with each other and are made of the same material. The thickness and basis weight are generally the same. However, for the purpose of imparting an additional function to the absorbent article 10, the thickness and / or basis weight of each region may be varied. For example, by making the basis weight of the hydrophilic fiber material and the superabsorbent polymer in the core front region 14A and the core center region 14C larger than those basis weights in the core rear region 14B, Absorption speed becomes faster and leakage becomes harder. In particular, when the absorbent article 10 is used as a male incontinence pad, it is more effective if it is unevenly distributed in the core front region 14A corresponding to the excretory part. Furthermore, you may form a groove part and a through-hole in at least 1 of each area | region. In particular, forming a groove and / or a through-hole in the core central region 14C is advantageous in that it increases the diffusibility of urine and improves the absorption capacity, thereby preventing leakage. On the other hand, in the core front region 14A, it is preferable not to form a groove and / or a through hole. This is because the core front region 14A is a region facing the excretion portion of the wearer, and therefore does not cause leakage even when urine is excreted vigorously. One or more grooves and / or through-holes can be formed so as to extend along the longitudinal direction X, for example.

  As shown in FIG. 2B, the core central region 14 </ b> C has the minimum width WC of the absorbent core 14 among the core front region 14 </ b> A, the core central region 14 </ b> C, and the core rear region 14 </ b> B constituting the absorbent core 14. The core front region 14A has the maximum width WA of the absorbent core 14. Furthermore, the core rear region 14B has an intermediate width WB that is an intermediate width between the minimum width WC and the maximum width WA. That is, WC <WB <WA. Therefore, when comparing the core front region 14A and the core central region 14C, the width in the core front region 14A is wider than the width in the core central region 14C. , A pair of projecting portions 17, 17 projecting outward in the width direction Y from the side edge in the core central region 14C. Paying attention to the core front region 14A, the core front region 14A includes a central portion 18 located at the center in the width direction Y and the above-described overhang portions 17 and 17 extending outward from the central portion 18 in the width direction. And. As another form, WB and WC may have the same width, that is, WC = WB <WA.

  The core material 15 which is a member located on the lower surface side of the absorbent body 13 has a length in the longitudinal direction X substantially equal to or shorter than the length in the longitudinal direction of the absorbent core 14. . When the length of the core material 15 is shorter than the length of the absorbent core 14, the length of the core material 15 is preferably 50% or more, more preferably 60% of the length of the absorbent core 14. Or more, preferably 100% or less, more preferably 95% or less. In any case, the core material 15 is located in a region where at least the second elastic member 20 is disposed in the longitudinal direction X.

Regarding the length in the width direction Y, the length of the core material 15 in the width direction Y substantially matches the minimum width WC in the core central region 14C of the absorbent core 14 as shown in FIG. Therefore, in the core front region 14A of the absorbent core 14 that is the portion having the maximum width WA, the core material 15 is located immediately below the central portion 18 of the core front region 14A. And the core material 15 does not exist in the area | region of the absorber 13 corresponding to the overhang | projection part 17 of 14 A of core front areas. Therefore, the second elastic member 20 and the core material 15 do not overlap. In other words, in the core front region, the absorbent body 13 has a central portion 18 having the absorbent core 14 and the core material 15, and extends outward from the central portion 18 in the width direction Y, and the absorbent core 14. And a pair of overhang portions 17 that do not have the core material 15. Even if the thickness of the hydrophilic fiber material that constitutes the absorbent core 14 is uniform in the width direction, the overhanging portion is compared with the central portion 18 because the core front region A has such a configuration. 17 has a small number of constituent members. As a result, the overhanging portion 17 has a bending rigidity lower than that of the central portion 18. The magnitude of the bending stiffness can be judged by comparing the measurement results using a handometer, for example. In this case, the handometer is a handometer made by Daiei Kagaku Seiki Seisakusho (model number: P360A), and the measurement conditions are a sample with a measuring instrument slit width of 30 mm and a length of 15 cm cut from the core front area A in the longitudinal direction. And measure. However, when the size of the absorbent article 10 is small and a sample of 15 cm or more cannot be taken, the length can be changed for measurement. The center portion 18 in the width direction Y (the portion including the core material 15 and the absorber 13) and the boundary between the core material in the longitudinal direction X and the overhang portion 17 are placed in parallel to the center portion of the slit width of the measuring instrument, and measurement is performed. be able to. If the slit width of the measuring instrument is too wide for the sample for evaluation, the slit width of the measuring instrument may be narrowed for evaluation. However, in order to measure and compare the bending stiffness of the overhang portion 17 and the bending stiffness of the central portion 18, the sample size and the slit width of the handometer are assumed to be the same. The thickness of the absorbent core 14 can be measured using, for example, Ozaki Manufacturing Co., Ltd. dial gauge (Peacock model number: No. 207). First, the adhesive is removed from the male incontinence pad 10 using an organic solvent, and materials other than the absorbent core 14 are carefully peeled off. Next, the removed absorbent core 14 is measured by applying a load of 36.6 mg / cm ² . At this time, in the core front region 14A, the thickness at any five points from the central portion 18 to the overhang portion 17 is measured to obtain an average value, and the thickness at each measurement point is 1.8 times or more of the average value. If it is 2 times or less, it is judged that the thickness is uniform. The load of 36.6 mg / cm ² is substantially no load, but if measured without any load, the measured value will be blurred because the pulp contained in the absorbent core 14 is fluffy. . Therefore, in order to suppress measurement fluctuation, measurement is performed with a slight load.

In the absorbent article 10, another sheet 19 may be disposed between the top sheet 11 and the absorber 13. Hereinafter, the sheet 19 is referred to as a “sublayer sheet 19”. The sublayer sheet 19 is used to give an additional function to the absorbent article 10. Examples of additional functions include a deodorizing function for odors generated from absorbed urine and a function for preventing reversion of absorbed urine. In order to impart a deodorizing function, the sublayer sheet 19 may contain a deodorant such as activated carbon. In order to provide the function of preventing the return of urine, for example, a fiber sheet having a low fiber presence density and a bulky structure may be used as the sublayer sheet 19 so that the top sheet 11 and the absorber 13 are separated from each other. As the sublayer sheet 19, for example, an air-through nonwoven fabric, a spunbond nonwoven fabric, a three-dimensionally shaped nonwoven fabric, or an apertured film can be used as a hydrophilic sheet material. Moreover, it is preferable that the basic weight of the sublayer sheet 19 is 20 g / m ² or more and 60 g / m ² or less.

  The sublayer sheet 19 can be disposed over the entire area of the absorbent body 13 facing the surface sheet 11, or can be disposed only on a part of the opposed surface. When the sub-layer sheet 19 is disposed only on a part of the opposing surface, for example, as shown in FIGS. can do. In this case, it is preferable to dispose the sublayer sheet 19 in at least the central region C, more preferably to dispose the sublayer sheet 19 in the central region C and the front region A, and the sublayer sheet over the entire longitudinal direction in the absorber 13. More preferably, 19 is disposed.

  In the absorbent article 10, the thread-like shape extending in the longitudinal direction X as shown in FIGS. 3 and 5 at the position of each overhanging portion 17 of the core front region 14A of the absorbent core 14 of the absorbent body 13 described above. Each of the elastic members 20 is arranged in an extended state. Hereinafter, this elastic member 20 is referred to as “second elastic member 20” for the purpose of distinguishing it from the elastic member 16B attached to the leak-proof cuff 16. Further, the elastic member 16B attached to the leak-proof cuff 16 is also referred to as “first elastic member 16B”. The second elastic member 20 is located closer to the back sheet 12 than the top sheet 11. Specifically, in the present embodiment, the second elastic member 20 is disposed at a position directly below the absorbent core 14 in the absorbent body 13 and between the absorbent core 14 and the back sheet 12. Yes. By disposing the second elastic member 20 at the position of the overhanging portion 17, each overhanging portion 17 is worn out of the core front region 14 </ b> A by contraction of two types of elastic members, the first elastic member 16 </ b> B and the second elastic member 20. Stands toward the person's body and forms a weir. Thereby, the front area A of the absorbent article 10 is deformed into a cup shape, and the fit is improved. Since the absorbent article 10 has the leak-proof cuff 16, the surface of the body side of the wearer in the dam portion is covered with a liquid-permeable sheet material 16A. Therefore, the weir part has liquid resistance. Side leakage of urine is effectively prevented. Moreover, since the overhanging portion 17 is composed of the absorbent core 14, the excreted urine reaches the overhanging portion 17 upright and is dammed there, and is sandwiched between the pair of leak-proof cuffs 16 and 16. Urine flows from the portion to the central portion 18 and immediately flows from the central portion 18 to the overhang portion 17 and is absorbed. Therefore, even when a large amount of urine is excreted at once, urine is quickly absorbed by both the central portion 18 and the overhang portion 17. Note that “the elastic member 20 is disposed at the position of the overhanging portion 17” means that the elastic member 20 is disposed at an outer position in the width direction Y from the boundary between the overhanging portion 17 and the central portion 18. This is intended to include not only the case but also the case where the elastic member 20 is arranged at the position of the boundary.

  In particular, the second elastic member 20 is disposed closer to the back sheet 12 than the absorbent core 14, and more specifically, disposed at a position between the absorbent core 14 and the back sheet 12. 2 Due to the contraction of the elastic member 20, the overhanging portion 17 contracts, and the surface sheet 11 which is the liquid receiving surface easily forms a concave shape (so-called cup shape) by synthesizing the contraction force of the first elastic member 16B. As a result, the excretory part can be covered, the fitting property at the time of wearing can be improved, and deviation and leakage can be prevented.

  When the absorbent article 10 is stretched flat and viewed in plan, the second elastic member 20 is preferably located outward in the width direction Y from the first elastic member 16B. By adopting such an arrangement relationship, the overhanging portion 17 is more successfully deformed by the synergistic effect of the contraction stress of the second elastic member 20 and the contraction stress of the first elastic member 16B. Even when the contraction stress of the second elastic member 20 is weak, the overhang portion 17 is easily deformed with the assistance of the contraction stress of the first elastic member 16B, and the core front region 14A is easily deformed into a cup shape. Become. As a result, two leak-proof gathers are formed by the weir portion and the leak-proof cuff 16 formed by the overhanging portion 17 erected by the elastic member 16B. Therefore, even if a large amount of urine is excreted at a time and the urine cannot be blocked by the leak-proof cuff 16, it is blocked by the overhang portion 17.

  Further, the projecting portion 17 is formed with one or more streak-like embossed portions extending along the longitudinal direction X, or a streak-like embossed portion extending obliquely so as to intersect the longitudinal direction X. The overhanging portion 17 can be easily deformed by forming it in one or multiple stripes.

  Furthermore, as described above, the core front region 14A is composed of the central portion 18 and the overhanging portion 17 extending outward in the width direction Y from the central portion 18, and the bending rigidity of the overhanging portion 17 is By making it lower than the bending rigidity of the central portion 18, the core front region 14A itself is easily deformed at or near the boundary between the protruding portion 17 and the central portion 18, and the protruding portion 17 is also deformed by this. It becomes easy to do. From the viewpoint of making this effect even more prominent, it is advantageous to increase the rigidity of the core material 15 disposed at a position overlapping the central portion 18 of the absorbent core 14 in the thickness direction. From this point of view, as shown in FIGS. 6A to 6C, the core material 15 formed by folding the sheet material in three is folded in three and the regions facing each other are bonded by an adhesive 21. It is preferable.

  The first elastic member 16B and the second elastic member 20 described above can be made of, for example, thread rubber, flat rubber, or film-like rubber. When these elastic members are made of thread rubber, the fineness of the thread rubber is preferably 400 dtex or more and 1000 dtex or less, and more preferably 500 dtex or more and 950 dtex or less. In addition, the fineness of the thread rubber used as the first elastic member 16B is preferably 1.2 times or more and 2.0 times or less than the fineness of the thread rubber used as the second elastic member 20.

  The first elastic member 16B and the second elastic member 20 are preferably arranged at an expansion ratio of 1.4 to 2.2 times, particularly 1.5 to 2.0 times. Adopting an expansion ratio in this range produces a sufficient contractile force. In addition, the residual strain when these elastic members expand and contract is prevented from becoming excessively large, and when the absorbent article 10 is worn, it is difficult for a gap to be formed between the absorbent article 10 and the wearer's body. Become.

  In the form shown in FIG. 6A, the adhesive 21 is applied in a wide spiral shape or stripe shape over the entire region in the width direction Y. The spiral adhesive 21 extends in the longitudinal direction, which is a direction orthogonal to the paper surface. In the form shown in FIG. 6B, a plurality of adhesives 21 are applied at intervals in the width direction Y. Each strip of adhesive 21 is applied in a narrow spiral shape and extends in the longitudinal direction, which is a direction perpendicular to the paper surface. In the form shown in FIG. 6C, the adhesive is applied to almost the entire width between the regions that are folded in three and face each other. The rigidity of the core material 15 can be adjusted by the application pattern of the adhesive 21 as shown in FIGS. Instead of or in addition to this, the amount of adhesive 21 can be adjusted.

  The core material 15 in the form shown in FIG. 6 (d) is different from the core material described so far, and when the sheet material constituting the core material 15 is folded in three, both side areas are not overlapped. The edge is in a state of being abutted. In FIG. 6 (d), the adhesive is not shown between the three folded regions facing each other, but the adhesive is applied in the patterns shown in FIGS. 6 (a) to 6 (c) or other patterns. May be.

  As shown in FIGS. 6 (a) to 6 (c), the sheet material is folded in three so that both side regions overlap, and as shown in FIG. 6 (d), both side edges are overlapped without overlapping both side regions. In any form in which the sheet material is folded in three so as to be in an abutted state, the core material 15 so that the overlapped part or the abutted part faces the absorbent core 14 May be arranged.

  As described above, in the absorbent article 10, the two types of elastic members, that is, the first elastic member 16 and the second elastic member 20 are arranged in the front area A of the absorbent article 10 in the front area A. Increases fit. In particular, when the first elastic member 16 is positioned on the wearer's body side with respect to the top sheet 11 and the second elastic member 20 is positioned on the back sheet 12 side with respect to the absorbent core 14, the fit described above. The property is further improved.

  Moreover, in this invention, the site | part which has the largest width | variety WA is provided in the core front area 14A from the viewpoint of the fitting property of the absorbent article 10 in the front area A, and a viewpoint of an absorption performance improvement. On the other hand, in the core central region C among the absorbent cores 14, the width of the core central region C is made smaller than the width of the core front region 14 </ b> A so as to maintain the wearing feeling and fit of the absorbent article 10. Yes.

  On the other hand, the width of the core rear region 14B is desirably widened from the viewpoint of enhancing the absorption performance in the core rear region 14B. However, the core rear area 14B has a smaller urination amount than the core front area 14A, and the width of the core rear area 14B is reduced to prevent the wearing feeling and fit of the absorbent article 10 from being reduced. It is not necessary to make it as large as the width of. Therefore, the width of the core rear region 14B is the same as the width of the core central region 14C, or larger than the width of the core central region 14C, but preferably smaller than the width of the core front region 14A. Since the width of the core rear region 14B is smaller than the width of the core front region 14A, it is possible to prevent a sense of incongruity during mounting. When the absorbent article 10 is a male incontinence pad, since the pad wearer is biased toward the front of the pad wearer, the pad hangs down due to gravity and is likely to be displaced. However, since the core rear region 14B is located at the crotch part of the wearer, if the width of the core rear region 14B is wider than the width of the core central region 14C, the width direction Y received from the wearer's legs Due to the pressure toward the inner side, it becomes easy to bend along the vertical direction starting from the side edge of the core material 15. Thereby, the contact area between the pad and the wearer is increased, and deviation is prevented. Furthermore, the absorbability of the core rear region 14B is improved, and leakage due to the liquid flowing along the longitudinal direction X can be prevented.

  In the present invention, the second elastic member 20 is disposed only on the both sides in the width direction Y of the absorbent article 10 at positions overlapping the front area A in the thickness direction. Specifically, as described above, the second elastic member 20 is disposed only at a position overlapping the overhanging portion 17 in the thickness direction. Therefore, the length in which the second elastic member 20 is disposed is the same as or shorter than the length of the overhanging portion 17 in the longitudinal direction. When the length in which the second elastic member 20 is arranged is the same as the length of the overhanging portion 17 in the longitudinal direction X, the contraction stress of the second elastic member 20 acts only on the overhanging portion 17 and is not applied to other parts. Does not act, so a good fit in the other part is maintained. Further, unnecessary contraction sites are not generated. As a result, an unintended decrease in the liquid receiving surface due to contraction can be effectively prevented. This effect is that the second elastic member 20 is positioned at the position of the overhanging portion 17 even when the length of the second elastic member 20 is shorter than the length of the overhanging portion 17 in the longitudinal direction X. If it is only arranged, it will be played. In that case, from the viewpoint of surely exhibiting the effect, the length in which the second elastic member 20 is disposed is preferably 80% or more of the length of the protruding portion 17 in the longitudinal direction X, and 90% or more. More preferably. Moreover, it is preferable that it is 100% or less from a viewpoint of preventing the phenomenon of the liquid receiving surface by shrinkage | contraction.

  The second elastic member 20 is joined to a member that sandwiches the second elastic member 20 at at least two positions spaced along the extending direction. For example, when the length in which the second elastic member 20 is disposed is the same as the length in the longitudinal direction X of the overhanging portion 17, the second elastic member 20 is disposed at the both end portions of the absorbent core 14. And can be fixed to the back sheet 12.

  In particular, when the members sandwiching the second elastic member 20 are joined via the second elastic member 20 over the entire length of the second elastic member 20, the contraction stress of the second elastic member 20 is applied to the member. This is preferable because it is effectively transmitted, thereby further improving the fit in the front area A of the absorbent article 10. For example, when the second elastic member 20 is arranged in the state shown in FIG. 3, it is preferable that the absorbent core 14 and the back sheet 12 are joined via the second elastic member 20.

  In the embodiment shown in FIG. 5 described above, one second elastic member 20 is arranged on one overhanging portion 17. However, as another embodiment, as shown in FIG. Two or more second elastic members may be arranged. By adopting such an arrangement form, it is possible to further improve the standing property of the overhanging portion 17 and further improve the fitting property in the front area A of the absorbent article 10.

  When the embodiment shown in FIG. 7 is employed, it is preferable that the second elastic members 20 are separated along the width direction Y from the viewpoint that the contraction stress can be effectively applied. For the same reason, when attention is paid to any two second elastic members 20, the second elastic member 20 located on the outer side in the width direction Y is the second elastic member 20 located on the inner side. It is preferable that the tensile stress is larger than that. The extension stress of the second elastic member 20 can be adjusted by, for example, the thickness of the second elastic member 20, the degree of stretching, the material, and the like.

  FIG. 8 shows yet another embodiment. 3 is a view corresponding to FIG. 3 described above, and shows a cross section in the width direction Y of the front area A of the absorbent article 10. This embodiment is different from the embodiment shown in FIG. 3 in that a pair of thread-like elastic members 22 (hereinafter, this elastic member 22 is also referred to as “third elastic member 22”) extends inside the core member 15. It is a point arranged in the state. The third elastic member 22 extends along the longitudinal direction X of the core material 15 along the folded portion of the sheet material constituting the core material 15 and inside the folded portion. For the other points, the description of the embodiment described so far applies similarly. According to the embodiment shown in FIG. 8, in addition to the action of the contraction stress of the first and second elastic members 16B, 20, the action of the contraction stress of the third elastic member 22 causes the front area A of the absorbent article 10 to The fit is further improved.

  The absorbent article 10 as described above is particularly suitable as an incontinence pad for urine absorption that is mounted on the inner surface of an undergarment or mounted on the inner surface of a diaper or diaper cover. In particular, it is suitable as a pad for incontinence for men. However, the absorbent article 10 can be applied to other uses such as disposable diapers and sanitary napkins.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this embodiment is not restrict | limited to the said embodiment. For example, in the said embodiment, although the absorptive core 14 had different width | variety in each of the core front region 14A, the core center region 14B, and the core back region 14B, it replaces with this and the width | variety of each region is the same It may be.

  In the embodiment, a thread-like elastic member is used as the second elastic member 20, but a film-like elastic member having a width and a length may be used instead. The same applies to the third elastic member 22.

  Further, in the embodiment shown in FIG. 8, instead of or in addition to the pair of third elastic members 22, another one or a plurality of the third elastic members 22 are provided in the central portion in the width direction Y of the core material 15. The third elastic member 22 may be arranged in an extended state.

This invention discloses the following absorbent articles further regarding embodiment mentioned above.
<1>
Having a longitudinal direction and a width direction perpendicular thereto,
A central region located at the center in the longitudinal direction, and a front region and a rear region extending from the central region to the front and rear in the longitudinal direction,
A topsheet, a backsheet, and an absorbent article disposed between both sheets and having an absorber,
The first elastic member is arranged in a stretched state on both sides of the article in the width direction over at least the region where the absorber exists in the longitudinal direction of the article,
The second elastic member extending in the longitudinal direction is disposed in both sides of the article in the width direction only in a position where it overlaps with the front region and the thickness direction,
The second elastic member is located closer to the back sheet than the absorber,
A core material extending along the longitudinal direction is disposed at the center of the absorbent body in the width direction,
The core material does not contain a superabsorbent polymer,
The said core material is an absorbent article located in the said back sheet side rather than the said absorber, and is located in the area | region where the said 2nd elastic member is arrange | positioned at least in the longitudinal direction.

<2>
The said core material is an absorbent article as described in said <1> which is a member used in order to provide rigidity to the said absorbent article.
<3>
The absorbent article according to <2>, wherein the rigidity is bending rigidity.
<4>
The absorbent article according to <3>, wherein the core member has a bending rigidity of 5.0 cN or more and 200 cN or less.
<5>
The absorbent article is provided with a pair of leak-proof cuffs extending in the longitudinal direction at positions on both sides in the width direction on the top sheet side,
The leak-proof cuff has a sheet material extending in the longitudinal direction,
The absorbent article according to any one of <1> to <4>, wherein the first elastic member is arranged in an extended state on the sheet material.
<6>
The absorbent article according to any one of <1> to <5>, wherein the core material is formed of a papermaking body.
<7>
The absorbent article according to any one of <1> to <6>, wherein the absorbent body and the core material are in a non-adhered state.
<8>
The core material is composed of a sheet material of a papermaking body,
The absorbent article according to any one of <1> to <7>, wherein the sheet material has a multilayer structure in which two or more sheets are stacked.
<9>
The core material has a first direction and a second direction orthogonal to the first direction, and is composed of a rectangular sheet material having a pair of side regions along the first direction,
<1> to <8, wherein the core material is configured by folding the sheet material in three along the first direction and without overlapping both side regions so that both side edges are in contact with each other. > Any one of>.

<10>
The core material has a first direction and a second direction orthogonal to the first direction, and is composed of a rectangular sheet material having a pair of side regions along the first direction,
The core material is configured by folding the sheet material in three along the first direction so that both side regions overlap.
The absorbent article according to any one of <1> to <8>, wherein an overlapping portion of the both side regions is located in a central portion in the width direction of the core material.
<11>
The absorbent article according to <9> or <10>, in which the core material configured by folding the sheet material in three is folded in three and an area between the regions facing each other is bonded with an adhesive.
<12>
In the core material configured by folding the sheet material in three, a third elastic member extending along the folded portion of the sheet material and inside the folded portion along the longitudinal direction of the core material. The absorbent article according to any one of <9> to <11>, which is arranged in an extended state.
<13>
The absorber has an absorbent core;
Corresponding to the absorbent article being divided into a front region, a central region and a rear region, the absorbent core is also divided into a core front region, a core central region and a core rear region,
The absorbent article according to any one of <1> to <12>, wherein the thickness and / or basis weight of the core front region, the core central region, and the core rear region are different.
<14>
The absorber has an absorbent core;
Corresponding to the absorbent article being divided into a front region, a central region and a rear region, the absorbent core is also divided into a core front region, a core central region and a core rear region,
The absorbent article according to any one of <1> to <13>, wherein a groove or a through hole is formed in at least one of the core front region, the core central region, and the core rear region.

<15>
The absorber has an absorbent core;
Corresponding to the absorbent article being divided into a front region, a central region and a rear region, the absorbent core is also divided into a core front region, a core central region and a core rear region,
The absorbent core according to any one of <1> to <14>, wherein the core central region has a minimum width WC of the absorbent core.
<16>
The absorber has an absorbent core;
Corresponding to the absorbent article being divided into a front region, a central region and a rear region, the absorbent core is also divided into a core front region, a core central region and a core rear region,
The core front region is the absorbent article according to any one of <1> to <15>, wherein the absorbent core has a maximum width WA.
<17>
The absorber has an absorbent core;
Corresponding to the absorbent article being divided into a front region, a central region and a rear region, the absorbent core is also divided into a core front region, a core central region and a core rear region,
The core central region has a minimum width WC of the absorbent core;
The core front region has a maximum width WA of the absorbent core;
The absorbent article according to any one of <1> to <16>, wherein the core rear region has an intermediate width WB that is an intermediate width between the minimum width WC and the maximum width WA.
<18>
The absorber has an absorbent core;
The absorbent core has a wider width in the front region than a width in the central region, whereby the absorbent core protrudes outward in the width direction in the front region rather than the side edge in the central region. The absorbent article according to any one of <1> to <17>, wherein the absorbent article has a protruding portion.
<19>
The absorbent body has a core wrap sheet and an absorbent core,
The absorbent article according to any one of <1> to <18>, wherein the core wrap sheet is disposed only on the surface sheet side of the absorbent core.

<20>
The absorbent body has a core wrap sheet and an absorbent core,
Corresponding to the absorbent article being divided into a front region, a central region and a rear region, the absorbent core is also divided into a core front region, a core central region and a core rear region,
The absorbent core has a wider width in the front region than a width in the central region, whereby the absorbent core protrudes outward in the width direction in the front region rather than the side edge in the central region. Has a protruding part,
In the width direction, the core wrap sheet has the same width as the core central region, and the overhanging portion is not covered with the core wrap sheet, and any one of <1> to <19> The absorbent article as described.
<21>
The absorber has an absorbent core;
In any one of the above items <1> to <20>, the length of the core material is substantially equal to or shorter than the length of the absorbent core in the longitudinal direction. The absorbent article as described.
<22>
The absorber has an absorbent core;
<1> to <1> to wherein the length of the core material is preferably 50% or more, more preferably 60% or more, preferably 100% or less, more preferably 95% or less of the length of the absorbent core. The absorbent article according to any one of <21>.
<23>
The absorber has an absorbent core;
Corresponding to the absorbent article being divided into a front region, a central region and a rear region, the absorbent core is also divided into a core front region, a core central region and a core rear region,
The core central region has a minimum width WC of the absorbent core;
The absorbent article according to any one of <1> to <22>, wherein a length of the core material in a width direction substantially coincides with a minimum width WC in the core central region.
<24>
The absorber has an absorbent core;
Corresponding to the absorbent article being divided into a front region, a central region and a rear region, the absorbent core is also divided into a core front region, a core central region and a core rear region,
The absorbent core has a wider width in the front region than a width in the central region, whereby the absorbent core protrudes outward in the width direction in the front region rather than the side edge in the central region. Has a protruding part,
The absorbent article according to any one of <1> to <23>, wherein the core material is not present in a region of the absorbent body corresponding to the protruding portion in the core front region.

<25>
The absorber has an absorbent core;
The absorbent core has a wider width in the front region than a width in the central region, whereby the absorbent core protrudes outward in the width direction in the front region rather than the side edge in the central region. Has a protruding part,
The absorbent article according to any one of <1> to <24>, wherein the overhanging portion has a bending rigidity lower than that of the central region.
<26>
The absorber has an absorbent core;
The absorbent article according to any one of <1> to <25>, wherein the second elastic member is located between the absorbent core and the back sheet.
<27>
When the absorbent article is stretched flat and viewed in plan, the second elastic member is any one of the items <1> to <26>, which is located outward in the width direction with respect to the first elastic member. 2. The absorbent article according to 1.
<28>
The absorber has an absorbent core;
The absorbent core has a wider width in the front region than a width in the central region, whereby the absorbent core protrudes outward in the width direction in the front region rather than the side edge in the central region. Has a protruding part,
The projecting portion is formed with one or more streak-like embossed portions extending along the longitudinal direction, or the projecting portion of the projecting-like embossed extending obliquely so as to intersect the longitudinal direction. The absorbent article according to any one of the above items <1> to <27>, wherein the part is formed in one or more lines.
<29>
The absorber has an absorbent core;
The absorbent article according to any one of <1> to <28>, wherein the core material is disposed at a position overlapping with a central portion of the absorbent core in a thickness direction of the absorbent article.

<30>
The absorber has an absorbent core;
The absorbent core has a wider width in the front region than a width in the central region, whereby the absorbent core protrudes outward in the width direction in the front region rather than the side edge in the central region. Has a protruding part,
The absorbent article according to any one of <1> to <29>, wherein the second elastic member is disposed over the entire longitudinal direction of the projecting portion.
<31>
The absorber has an absorbent core;
The absorbent core has a wider width in the front region than a width in the central region, whereby the absorbent core protrudes outward in the width direction in the front region rather than the side edge in the central region. Has a protruding part,
The second elastic member is disposed on the projecting portion;
The length of the second elastic member is preferably 80% or more of the length in the longitudinal direction of the protruding portion, more preferably 90% or more, and preferably 100% or less. The absorbent article according to any one of 1> to <30>.
<32>
The absorbent article according to any one of <1> to <31>, wherein members sandwiching the second elastic member are joined via the second elastic member over the entire length of the second elastic member. .
<33>
The absorber has an absorbent core;
The absorbent core has a wider width in the front region than a width in the central region, whereby the absorbent core protrudes outward in the width direction in the front region rather than the side edge in the central region. Has a protruding part,
Two or more second elastic members extending in the longitudinal direction of the overhanging portion are disposed on the overhanging portion,
Each said 2nd elastic member is spaced apart along the width direction,
When attention is paid to any two of the second elastic members, the second elastic member positioned on the outer side in the width direction has a tensile stress higher than that of the second elastic member positioned on the inner side. The absorbent article according to any one of <1> to <32>, wherein the absorbent article is large.
<34>
The absorbent article according to any one of <1> to <33>, wherein the absorbent article is a male incontinence pad.

DESCRIPTION OF SYMBOLS 10 Absorbent article 11 Top sheet 12 Back sheet 13 Absorber 14 Absorbent core 15 Core material 16 Leak-proof cuff 16A Sheet material 16B Elastic member (first elastic member)
17 Overhang portion 18 Center portion 19 Sublayer sheet 20 Elastic member (second elastic member)
21 Adhesive 22 Elastic member (third elastic member)
23 Core wrap sheet

Claims (6)

Having a longitudinal direction and a width direction perpendicular thereto,
A central region located at the center in the longitudinal direction, and a front region and a rear region extending from the central region to the front and rear in the longitudinal direction,
A topsheet, a backsheet, and an absorbent article disposed between both sheets and having an absorber,
The first elastic member is arranged in a stretched state on both sides of the article in the width direction over at least the region where the absorber exists in the longitudinal direction of the article,
The second elastic member extending in the longitudinal direction is disposed in both sides of the article in the width direction only in a position where it overlaps with the front region and the thickness direction,
The second elastic member is located closer to the back sheet than the absorber,
A core material extending along the longitudinal direction is disposed at the center of the absorbent body in the width direction,
The core material does not contain a superabsorbent polymer,
The core material is located on the back sheet side from the absorber, and is located in a region where at least the second elastic member is disposed in the longitudinal direction ,
The absorbent article in which the second elastic member and the core material do not overlap in the thickness direction .   The absorptive article according to claim 1 in which said core material is constituted from papermaking.   The absorptive article according to claim 1 or 2 in which said absorber and said core material are in a non-joining state. The core material has a first direction and a second direction orthogonal to the first direction, and is composed of a rectangular sheet material having a pair of side regions along the first direction,
The core material is configured by folding the sheet material in three along the first direction so that both side regions overlap.
The absorbent article as described in any one of Claim 1 thru | or 3 in which the overlap part of the said both-sides area is located in the width direction center part of the said core material.   The absorbent article according to claim 4, wherein the core material formed by folding the sheet material in three is folded in three and the regions facing each other are bonded by an adhesive. Having a longitudinal direction and a width direction perpendicular thereto,
A central region located at the center in the longitudinal direction, and a front region and a rear region extending from the central region to the front and rear in the longitudinal direction,
A topsheet, a backsheet, and an absorbent article disposed between both sheets and having an absorber,
The first elastic member is arranged in a stretched state on both sides of the article in the width direction over at least the region where the absorber exists in the longitudinal direction of the article,
The second elastic member extending in the longitudinal direction is disposed in both sides of the article in the width direction only in a position where it overlaps with the front region and the thickness direction,
The second elastic member is located closer to the back sheet than the absorber,
A core material extending along the longitudinal direction is disposed at the center of the absorbent body in the width direction,
The core material does not contain a superabsorbent polymer,
The core material is located on the back sheet side from the absorber, and is located in a region where at least the second elastic member is disposed in the longitudinal direction,
The core material has a first direction and a second direction orthogonal to the first direction, and is composed of a rectangular sheet material having a pair of side regions along the first direction,
The core material is configured by folding the sheet material in three along the first direction so that both side regions overlap.
The overlapping part of the both side regions is located in the center in the width direction of the core material,
In the core material configured by folding the sheet material in three, a third elastic member extending along the folded portion of the sheet material and inside the folded portion along the longitudinal direction of the core material. intake Osamusei goods that have been arranged in a stretched state.

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