JP2021007679A - Absorbent article - Google Patents

Abstract

To provide an absorbent article capable of suppressing leakage of urine.SOLUTION: An absorbent article includes: a liquid-permeable top sheet arranged on a skin facing surface side at a fitting time; a liquid-impermeable back sheet arranged on the opposite side to the skin facing surface; an absorber having a gourd shape in a top face view, and arranged between the top sheet and the back sheet; and a groove extending in a longer direction of the absorber, while including a urethral opening corresponding area on the top sheet side of the absorber, and formed on a width direction center part of the absorber. The groove is extended from a narrow width area central part of the gourd shape of the absorber to the front body area side as long as 165 mm or more and 215 mm or less.SELECTED DRAWING: Figure 1

Description

The present invention relates to absorbent articles.

Absorbent articles such as disposable diapers, absorbent pads (urine pads), and sanitary napkins are known. The absorbable article is formed of a pulp or a super absorbent polymer (SAP), and includes an absorber that absorbs a liquid such as urine or body fluid. Patent Document 1 describes an absorbent article comprising an upper layer absorber and a lower layer absorber and having an opening (groove) formed in the upper layer absorber.

International Publication No. 2016/114209

In absorbent articles, grooves may be formed in the absorber to increase the diffusivity of urine. However, if the urine is too diffused to the abdominal side of the wearer by the groove, there is a problem that the urine leaks from the abdominal side of the absorbent article.

Therefore, an object of the present invention is to provide an absorbent article capable of suppressing leakage of urine.

In order to solve the above problems, the absorbent article according to the present invention is provided with a groove extending from the central portion of the gourd-shaped narrow region of the absorber to the front body region side by 165 mm or more and 215 mm or less.

Specifically, the absorbent article according to the present invention includes an absorbent article having a front body region located on the abdominal side of the wearer, an inseam region located on the inseam, and a back body region located on the back side when worn. The liquid-permeable top sheet arranged on the skin-facing surface side at the time of wearing, the liquid-impermeable back sheet arranged on the opposite side of the skin-facing surface, and the top sheet and the back sheet. An absorber having a gourd shape in top view and extending in the longitudinal direction of the absorber including a region corresponding to the urinary meatus on the top sheet side of the absorber and the width of the absorber. A groove formed in the central portion of the direction is provided, and the groove extends from the central portion of the gourd-shaped narrow region of the absorber to the front body region side by 165 mm or more and 215 mm or less, and the urinary meatus. The corresponding region exists in a range of 100 mm or more and 160 mm or less from the tip of the groove on the front body region side, and the groove in the urinary meatus corresponding region has a width of 15 mm or more and 40 mm or less and a depth of 6 mm or more and 10 mm or less. The groove does not extend to the front body region side of the urinary meatus corresponding region, and the groove extends to the back body region side of the urinary meatus corresponding region. The groove on the back body region side of the urinary meatus region has a width of 10 mm or more and 35 mm or less and a depth of 5 mm or more and 9 mm or less, and the absorber contains pulp and the absorber. The basis weight of the pulp in the peripheral portion of the urinary meatus corresponding region is 400 g / m ² or more and 560 g / m ² or less, and the basis weight of the pulp in the region other than the peripheral portion is 350 g / m ² or more and 530 g / m /. It is m ² or less.

In the above-mentioned absorbent article, the absorber may have a layer containing pulp in a region overlapping the groove on the back body region side of the urethral meatus-corresponding region.

In the absorbent article, the absorber may have a pulp-containing layer in a region that overlaps the groove in the region corresponding to the urethral meatus.

The absorbent article may be disposed outside in the width direction of the groove and may further include a SAP layer containing a plurality of particles of the highly absorbent polymer.

In the above-mentioned absorbent article, the SAP layer may have a larger amount of SAP as the region closer to the groove.

In the above-mentioned absorbent article, the basis weight of SAP in the SAP layer may be 100 g / m ² or more and 200 g / m ² or less, and the urine retention amount in the SAP layer may be 130 g or more and 350 g or less.

In the above-mentioned absorbent article, the absorber has an upper layer absorber arranged on the top sheet side and a lower layer absorber arranged on the back sheet side, and the groove is the upper layer absorber. Is formed so as to penetrate in the thickness direction, and the SAP layer may be arranged between the upper layer absorber and the lower layer absorber.

In the above-mentioned absorbent article, the SAP layer containing a plurality of particles of the highly absorbent polymer may not be formed in the region adjacent to the groove.

With the above-mentioned absorbent article, leakage of urine can be suppressed.

FIG. 1 is a plan view of the absorbent pad. FIG. 2 is a cross-sectional view of the absorbent pad. FIG. 3 is a table showing the results of the lateral decubitus absorption amount test of the absorbent pad. FIG. 4 is a table showing the results of the sitting absorption amount test of the absorbent pad. FIG. 5 is a table showing the results of the lateral decubitus absorption amount test of the absorbent pad. FIG. 6 is a table showing the results of the sitting absorption amount test of the absorbent pad.

Hereinafter, embodiments of the present invention will be described. The embodiments shown below are examples of embodiments of the present invention, and the technical scope of the present invention is not limited to the following embodiments.

FIG. 1 is a plan view of the absorbent pad 1 (an example of the “absorbent article” referred to in the present application) according to the present embodiment as viewed from the skin facing surface side. The absorbent pad 1 is used to absorb and retain a liquid such as urine, and can be used alone or stacked on the inside of a disposable diaper. The absorbent pad 1 includes a front body region 3 located on the abdomen side of the wearer, an inseam region 5 located on the inseam, and a back body region 7 located on the back side when worn. The absorbent pad 1 is divided into a front body region 3, an inseam region 5, and a back body region 7 when viewed in the longitudinal direction. The direction orthogonal to the longitudinal direction is the width direction (short direction) of the absorbent pad 1. The absorbent pad 1 has the narrowest width in the inseam region 5 in the top view (planar view), and the inseam region 5 has a constricted gourd shape.

In the following, when the absorbent pad 1 is viewed in the longitudinal direction, the front body region 3 side is referred to as "front", "front side", "front", and "abdominal side", and is relatively rear. The body area 7 side is called "rear", "rear side", "rear", or "back side", and the left side is relatively left from the rear side to the front side as "left", "left side", or "left side". The right side is referred to as "right", "right side", or "right side" from the rear side to the front side. The front-rear direction of the absorbent pad 1 is the longitudinal direction, and the left-right direction of the absorbent pad 1 is the width direction. Further, the direction orthogonal to the front-back and left-right directions is the thickness direction (height direction) of the absorbent pad 1.

As shown in FIG. 1, the absorbent pad 1 includes a top sheet 11 arranged on the skin-facing surface side when worn (wearing state). The top sheet 11 is a portion (skin facing surface) that comes into contact with the wearer's skin when the absorbent pad 1 is worn, and is made of a liquid-permeable material that allows liquids such as urine to permeate. Specifically, a woven fabric, a non-woven fabric, a porous film, or the like is used for the top sheet 11. As the non-woven fabric, a thermoplastic resin fiber such as polypropylene, polyethylene, polyester, or nylon that has been hydrophilized may be used, or an air-through non-woven fabric, a point bond non-woven fabric, a spunbond non-woven fabric, a melt blow non-woven fabric, or the like may be used. May be good.

Further, the absorbent pad 1 includes a back sheet 13 arranged on the opposite side of the skin-facing surface when worn. The back sheet 13 is a portion that is a non-skin facing surface (outer surface) opposite to the skin facing surface, and is made of a liquid-impermeable material that does not allow liquids such as urine to permeate. Specifically, a liquid-impermeable film made of polyethylene resin is used for the back sheet 13. The back sheet 13 is made of microporous polyethylene in which a plurality of fine holes of 0.1 to 4 μm are formed in order to obtain air permeability for preventing stuffiness in the mounted state while maintaining liquid impermeableness. It is preferable to use a film.

The peripheral portions of the top sheet 11 and the back sheet 13 are joined to each other. Further, the absorbent pad 1 is arranged between the top sheet 11 and the back sheet 13 and includes an absorbent body 14 that absorbs a liquid such as urine. The absorber 14 has an upper layer absorber 15 arranged on the top sheet 11 side and a lower layer absorber 17 arranged on the back sheet 13 side. The upper layer absorber 15 has substantially the same gourd shape as the absorbent pad 1 when viewed from above. The lower layer absorber 17 is arranged below the upper layer absorber 15 when viewed from the top sheet 11 side, and has a rectangular shape having a long side in the longitudinal direction of the absorbent pad 1 when viewed from above. Further, in the top view, the upper layer absorber 15 is formed larger than the lower layer absorber 17. The absorbent pad 1 is relatively large when a liquid such as urine is excreted, and the upper layer absorber 15 arranged on the top sheet 11 side can rapidly absorb urine. The longitudinal direction of the absorber 14 is the longitudinal direction of the upper layer absorber 15 and the lower layer absorber 17, and coincides with the longitudinal direction of the absorbent pad 1. Further, the width direction of the absorber 14 is the width direction of the upper layer absorber 15 and the lower layer absorber 17, and coincides with the width direction of the absorbent pad 1.

The upper layer absorber 15 and the lower layer absorber 17 are a combination of fluff pulp obtained by crushing a fiber material such as softwood, a super absorbent polymer (SAP), a hydrophilic sheet, and the like. Things are used. In addition, SAP absorbs about 10 to 100 times its own weight of liquid. As the SAP, for example, a granular one having a diameter of about 0.1 to 0.5 mm in a state before liquid absorption is used.

Further, the absorbent pad 1 includes a groove 21 formed by penetrating the upper layer absorber 15 in the thickness direction. The groove 21 includes the urethral meatus corresponding region 37 (the region indicated by hatching to the right in FIG. 1) on the top sheet side (upper layer absorber 15) of the absorber 14 and extends in the longitudinal direction of the absorber 14 and the absorber 14 It is formed in the central part in the width direction of. The details of the urethral meatus area 37 will be described later.

Further, the groove 21 extends from the central portion of the gourd-shaped narrow region of the absorber 14 to the front body region 3 side and the rear body region 7 side. Here, the gourd-shaped narrow region central portion of the absorber 14 is a longitudinal central portion in the narrow region 5a, which is the narrowest region in the inseam region 5 of the upper layer absorber 15. is there. In FIG. 1, the central portion of the narrow region is indicated by a virtual straight line c represented by a two-dot chain line. When the narrowest portion of the absorber 14 is defined in a substantially linear shape in the top view, this portion is defined as the central portion of the narrow region. The central portion of the narrow region is located at the lowermost position in the absorber 14 when the wearer stands up when the absorbent pad 1 is worn in the normal usage mode.

The groove 21 has a length y from the central portion of the narrow region to the front body region 3 side. In the present embodiment, the length y is 165 mm or more and 215 mm or less. As described above, the groove 21 extends from the central portion of the gourd-shaped narrow region of the absorber 14 to the front body region 3 side by 165 mm or more and 215 mm or less. Further, the groove 21 extends from the central portion of the gourd-shaped narrow region of the absorber 14 to the rear body region 7 side. In the present embodiment, as shown in FIG. 1, the groove 21 extends to the front portion of the back body region 7. For example, the groove 21 preferably extends from the central portion of the narrow region to the rear body region 7 side by 87.5 mm or more.

Here, the urethral meatus corresponding region 37 exists in a range of 100 mm or more and 160 mm or less from the tip portion of the groove 21 on the front body region 3 side. The tip of the groove 21 on the front body region 3 side coincides with the tip of the urethral meatus region 37 on the front body region 3 side. The urethral meatus-corresponding area 37 is an area where the wearer's urethral meatus abuts on the top sheet 11 and is a urination position. The groove 21 is formed including the urethral meatus corresponding region 37 so that the urine excreted by the wearer can easily flow in. The urethral meatus corresponding area 37 is defined in consideration of individual differences in the position of the urethral meatus of the wearer, gender differences, and minute misalignment of the absorbent pad 1 that occurs for each wearer. In this embodiment, the urethral meatus corresponding area 37 is defined by collecting statistics on the contact positions between the urethral meatus and the absorbent pad of 15 adult males and 15 adult females.

In addition, if the width of the groove is too narrow in the area corresponding to the urethral meatus, urine overflows from the groove, and the groove cannot diffuse urine to the entire absorber, and urine leaks from the side of the absorbent article. Will occur. Therefore, in the present embodiment, the required width of the groove 21 in the urethral meatus corresponding region 37, which is the urination position, is set. The width of the groove 21 is generally set based on the amount and rate of urination of an adult in need of care at one time. The amount of urination is 150 ml, and the rate of urination is 10 ml / sec. The groove 21 in the urethral meatus contact area 37 is primarily a space for receiving urine, and in the present embodiment, the width x of the groove 21 in the urethral meatus contact area 37 is determined from the conditions required in this space. I set it. In the present embodiment, the width x of the groove 21 in the urethral meatus corresponding region 37 is set to 15 mm or more and 40 mm or less. The groove 21 in the urethral meatus corresponding region 37 functions as a space for receiving urine, and the discharged urine can flow into the groove 21 and diffuse throughout the absorber 14.

Further, the depth of the groove 21 in the urethral meatus corresponding region 37 is also set from the conditions required in the space for receiving urine. In the present embodiment, the groove 21 in the urethral meatus corresponding region 37 has a depth of 6 mm or more and 10 mm or less.

Further, the groove 21 does not extend on the front body region 3 side of the urethral meatus corresponding region 37. In an absorbent article, if urine is diffused too much toward the front body region, urine overflows from the groove in the front body region, and the absorber in the front body region cannot absorb this urine, resulting in lateral leakage. There is a risk that it will end up. In the present embodiment, the tip of the groove 21 on the front body region 3 side and the tip of the urethral meatus corresponding region 37 on the front body region 3 side are aligned with each other so as to be closer to the front body region 3 than the urethral meatus corresponding region 37. The groove 21 is not formed. As a result, the absorbent pad 1 according to the present embodiment can suppress lateral leakage of urine by diffusing urine from the tip end portion of the groove 21 to the back body region 7 side.

Further, in the present embodiment, the absorber 14 (upper layer absorber 15 and lower layer absorber 17) contains pulp as described above. Immediately after urination, urine moves from the groove 21 to the absorber 14, so that the absorber 14 also functions to suppress lateral leakage immediately after urination. Therefore, in the present embodiment, it is assumed that the pulp is responsible for retaining urine immediately after urination, and the basis weight of the pulp is based on the performance of the pulp (the ability to suck urine from the groove 21 and the ability to hold the sucked urine). Specified in. For example, in the absorber 14 in the peripheral portion of the urinary meatus contact region 37, since it is necessary to absorb urine into the pulp in 5 seconds after the end of urination, the absorber 14 (upper layer absorber 15 and lower layer absorber 17) is used. Including), the basis weight of the pulp in the peripheral portion of the urinary meatus corresponding region 37 was 400 g / m ² or more and 560 g / m ² or less. Here, the peripheral portion is a range of 30 mm in front, back, left and right of the area corresponding to the urethral meatus. This range is the range in which urine diffuses within about 1 second when the wearer urinates. Further, except for the peripheral portion of the urethral meatus corresponding region 37, if the absorber 14 is thinned in the inseam region 5, it becomes easier to apply the absorbent pad 1 to the wearer, and the absorber 14 in the region corresponding to the buttocks of the wearer is thickened. Then, the effect of improving the cushioning property can be obtained. For example, when the absorbent pad 1 is used for long-term care, if it becomes easier to apply the absorbent pad 1 to the care recipient, it becomes easier for the care recipient to wear the absorbent pad 1. This is because by thinning the absorber 14 of the portion of the absorbent pad 1 corresponding to the wearer's crotch in the inseam region 5, it becomes easier to fit the portion between the wearer's crotch. If the absorbent article is made too thick, it becomes difficult to deploy the absorbent article, and it becomes difficult to make the three-dimensional gathers fit the wearer's body. Further, if the absorbent article is made too thick, the resistance received between the wearer's crotch becomes larger than that in the case where the absorbent article is thin, so that it takes time and effort to attach the article. In consideration of these, in the present embodiment, the basis weight of the pulp in the absorber 14 (including the upper layer absorber 15 and the lower layer absorber 17) in the region other than the peripheral portion of the urethral meatus corresponding region 37 is 350 g / m ² or more. It was 530 g / m ² or less.

Further, the groove 21 on the back body region 7 side of the urethral meatus corresponding region 37 has a width of 10 mm or more and 35 mm or less and a depth of 5 mm or more and 9 mm or less. The groove 21 on the back body region 7 side of the urethral meatus corresponding region 37 may be narrower in width or shallower than the groove 21 in the urethral meatus corresponding region 37.

The absorbent pad 1 according to the present embodiment allows urine to flow into the groove 21 and diffuses toward the back body region 7 side of the urethral meatus corresponding region 37. As a result, the absorbent pad 1 according to the present embodiment is absorbed by the absorber 14 on the back body region 7 side of the urethral meatus corresponding region 37, and urine flows to the front body region 3 side of the urethral meatus corresponding region 37. By preventing it from leaking, it is possible to prevent urine from leaking from the abdominal side.

Further, the absorbent pad 1 has SAP layers 23L and 23R arranged between the upper layer absorber 15 and the lower layer absorber 17. The SAP layers 23L and 23R are formed by aggregating a plurality of particles of a highly absorbent polymer (SAP). The SAP layers 23L and 23R contain a plurality of SAP particles, and can absorb and retain the liquid guided between the upper layer absorber 15 and the lower layer absorber 17. As shown in FIG. 1, the SAP layer 23L is arranged on the left side of the groove 21, and the SAP layer 23R is arranged on the right side of the groove 21. As described above, the SAP layers 23L and 23R are arranged on both sides of the groove 21 so as to be along the longitudinal direction of the groove 21. Further, in the top view, the SAP layers 23L and 23R are formed in a rectangular shape. The SAP layers 23L and 23R may be formed in a polygonal shape or an elliptical shape instead of a rectangular shape in a top view.

The basis weight of SAP in the SAP layers 23L and 23R is 100 g / m ² or more and 200 g / m ² or less. The amount of urine retained in the SAP layers 23L and 23R is 130 g or more and 350 g or less. As a result, the absorbent pad 1 according to the present embodiment can hold about 600 ml of urine in the entire SAP layers 23L, 23R and the absorber 14.

The SAP layer 23L is arranged from the outside by w1 mm from the left end of the groove 21 to the inside by w2 mm from the left end of the upper layer absorber 15. Similarly, the SAP layer 23R is arranged from the outside w1 mm from the right end portion of the groove 21 to the inside w2 mm from the right end portion of the upper layer absorber 15. As described above, the SAP layers 23L and 23R are arranged from the outside of w1 mm from both ends of the groove 21 to the inside of w2 mm from the end in the width direction of the upper layer absorber 15. w1 mm is, for example, 10 mm, and w2 mm is, for example, 10 mm. The SAP layers 23L and 23R are arranged outside the groove 21 in the width direction. The absorbent pad 1 according to the present embodiment includes SAP layers 23L and 23R arranged outside the groove 21 in the width direction, thereby holding urine in a region not adjacent to the groove 21 (with an interval of w1 mm). This makes it possible to prevent the absorber 14 from being subjected to pressure such as a load from the wearer and returning urine to the groove, thereby suppressing the leakage of urine. Further, in order to obtain this effect more, in the absorbent pad 1, the SAP layers 23L and 23R may have a larger amount of SAP as the region closer to the groove 21.

Further, as described above, the SAP layers 23L and 23R are arranged outside w1 (10 mm) from both ends of the groove 21. In other words, the SAP layer containing a plurality of highly absorbent polymer particles is not formed in the adjacent region of the groove 21. If the SAP particles spill into the groove, the SAP particles may absorb urine and swell to block the groove. The absorbent pad 1 according to the present embodiment has a width w1 of 10 mm or more in order to prevent SAP particles from spilling into the groove 21.

Further, the SAP layers 23L and 23R are longer than the groove 21, and the length in the longitudinal direction of the groove 21 is included in the length of the SAP layers 23L and 23R in the longitudinal direction. When the absorbent pad 1 is an adult urine absorbing pad, the widths of the SAP layers 23L and 23R are 43 mm to 45 mm, and the lengths of the SAP layers 23L and 23R are 470 mm to 555 mm.

As described above, the absorbent pad 1 according to the present embodiment includes an upper layer absorber 15, a lower layer absorber 17, a groove 21, and SAP layers 23L and 23R. The longitudinal directions of the upper layer absorber 15, the lower layer absorber 17, the groove 21, and the SAP layers 23L and 23R are the same. Further, the groove 21 and the SAP layers 23L and 23R are arranged substantially parallel to each other.

Further, in the absorbent pad 1, three-dimensional gathers (not shown) are arranged along the left and right ends of the lower layer absorber 17 when viewed from the skin facing surface side. The three-dimensional gather is joined to the top sheet 11 to suppress lateral leakage of the liquid.

FIG. 2 is a cross-sectional view of the absorbent pad 1 shown in FIG. 1 cut along the line AA. In FIG. 2, in order to make each component of the absorbent pad 1 easy to understand, a gap is provided between the components, but in reality, a gap is not substantially formed between the components. ..

As shown in FIG. 2, the absorbent pad 1 according to the present embodiment includes a core wrap sheet 30 (not shown in FIG. 1) that encloses the entire absorber 14. The core wrap sheet 30 has an upper layer sheet 31 arranged on the upper layer absorber 15 side and a lower layer sheet 33 arranged on the lower layer absorber 17 side. The upper layer sheet 31 is arranged between the top sheet 11 and the upper layer absorber 15, and the lower layer sheet 33 is arranged between the back sheet 13 and the lower layer absorber 17. Further, the lower layer sheet 33 has a portion that covers the side surface portions of the upper layer absorber 15 and the lower layer absorber 17, and is routed between the top sheet 11 and the upper layer absorber 15, and the top sheet 11 and the upper layer It is joined to the upper layer sheet 31 with the absorber 15. In this way, the upper layer sheet 31 and the lower layer sheet 33 are joined to each other and integrated, and enclose the entire upper layer absorber 15 and the lower layer absorber 17. For the upper layer sheet 31 and the lower layer sheet 33, for example, thin paper such as tissue paper, non-woven fabric, or the like is used. The upper layer sheet 31 and the lower layer sheet 33 may be integrally formed, or may be joined to the side surfaces of the upper layer absorber 15 and the lower layer absorber 17, or between the back sheet 13 and the lower layer absorber 17. You may. In the absorbent pad 1 according to the present embodiment, by wrapping the entire absorber 14 with the core wrap sheet 30, a liquid such as urine can be diffused over the entire surface of the absorber 14 and absorbed by the entire absorber 14. it can.

The SAP layers 23L and 23R are formed by spraying SAP particles on the lower layer absorber 17. Further, the SAP layers 23L and 23R are sandwiched between the upper layer absorber 15 and the lower layer absorber 17. Therefore, even if the absorbent pad 1 is moved by the movement of the wearer, the SAP particles contained in the SAP layers 23L and 23R may move below the groove 21 or fall out of the lower layer absorber 17. Can be prevented.

Further, by arranging the SAP layers 23L and 23R between the upper layer absorber 15 and the lower layer absorber 17, the urine once absorbed by the pulp of the lower layer absorber 17 due to the capillary phenomenon is moved to the SAP layers 23L and 23R. Can be done. As a result, the absorbent pad 1 can suppress the leakage of urine by retaining the urine in the SAP layers 23L and 23R having higher urine retention.

As described above, the absorbent pad 1 according to the present embodiment is viewed from the skin facing surface side in the thickness direction, the top sheet 11, the upper layer sheet 31, a part of the lower layer sheet 33, the upper layer absorber 15, and the SAP layer 23L. , 23R, the lower layer absorber 17, a part of the lower layer sheet 33, and the back sheet 13 in this order. Further, by joining the peripheral portions of the top sheet 11 and the back sheet 13 to each other, the upper layer sheet 31, the lower layer sheet 33, the upper layer absorber 15, the SAP layers 23L, 23R and the lower layer absorber 17 become the top sheet 11 and the back. The circumference is surrounded by the sheet 13 and sealed.

Further, a lower layer absorber 17 is arranged below the groove 21. Therefore, the absorber 14 has a lower layer absorber 17 as a layer containing pulp in a region overlapping the groove 21 on the back body region 7 side of the urethral meatus corresponding region 37. As described above, the absorbent pad 1 according to the present embodiment is provided with a structure in which the groove 21 is formed only in the upper layer absorber 15 so that urine quickly reaches the lower layer absorber 17 and is absorbed by the lower layer absorber 17. , Urine leakage can be suppressed.

Further, the absorber 14 has a lower layer absorber 17 as a layer containing pulp in a region overlapping the groove 21 in the region corresponding to the urethral meatus 37. In other words, a groove may be formed in the lower layer absorber 17 other than the region corresponding to the urethral meatus 37. The absorbent pad 1 is provided with a groove that penetrates the upper layer absorber 15 and the lower layer absorber 17 in the thickness direction on the back body region 7 side of the urethral meatus corresponding region 37, so that urine can be quickly moved to the back body region. It is possible to prevent urine from leaking from the abdominal side.

By the way, in the absorbent pad described in Patent Document 1, a penetrating groove that penetrates the upper layer absorber and the lower layer absorber in the thickness direction is formed. However, in the absorbent pad, the volume of the groove on the abdominal side and the back side from the part corresponding to the urethral meatus and the part corresponding to the urethral meatus is not defined. Therefore, in the absorbent pad, a liquid such as urine may flow through the groove to the abdomen side in an amount exceeding the amount absorbed by the absorber on the abdominal side, and the liquid may leak from the abdominal side. There is. On the other hand, the absorbent pad 1 according to the present embodiment does not form a groove 21 on the front body region 3 side of the urinary meatus corresponding region 37, so that urine flows to the front body region 3 side of the urinary meatus corresponding region 37. By extending the groove 21 on the back body region 7 side of the urinary meatus area 37 while preventing the urinary meatus, urine flows to the back body area 7 side of the urinary meatus area 37, and the absorber 14 and SAP. By retaining urine in the layers 23L and 23R, it is possible to suppress the leakage of urine.

In addition, the absorbent pad is generally widely used by a wearer (care recipient) who needs long-term care. As a measure against pressure ulcers of the wearer, the wearer may be fixed in the lateral decubitus position, which is a sideways posture. When the wearer urinates on the absorbent pad in a lateral decubitus position, a liquid such as urine flows to the abdomen side through a groove formed in the absorber in an amount exceeding the amount absorbed by the abdominal absorber. Therefore, there is a problem that the liquid leaks from the abdominal side. In particular, the abdominal side of the absorbent pad is not sandwiched between the wearer's body and the bed and is more body and absorbent than the back side of the absorbent pad sandwiched between the wearer's body and the bed. A gap is likely to occur between the pad and the pad, and as a result, urine is likely to leak. For this reason, it is required to suppress the leakage of liquid in the lateral decubitus position in the absorbent pad for long-term care.

In this embodiment, the suppression of liquid leakage in the absorbent pad was evaluated by a lateral decubitus position absorption test using a dummy doll. Preparations for the lateral decubitus absorption test include dummy dolls, liquid feed pumps, tubes, tube joints, 200 ml poly cups, electronic balances, stopwatches, artificial urine, rulers, protractors, weights, rubber sheets to prevent misalignment, and absorption. A sex pad, outer pants for fixing absorbent pads, and a jig for height adjustment. Artificial urine was prepared by dissolving 20 g of urea, 8 g of sodium chloride, 0.8 g of magnesium sulfate heptahydrate, and 0.3 g of calcium chloride dihydrate in 1000 mL of distilled water. In this embodiment, a lateral decubitus absorption amount test was performed using a female dummy doll.

The dimensions of the dummy used in the lateral decubitus absorption test are 760 mm for the abdomen, 850 mm for the buttocks, 460 mm for the base of the foot, 390 mm for the base of the crotch, 350 mm for the thigh, and pass through the crotch from the navel. The length to the back was set to 650 mm.

First, a tube is attached to the liquid feed pump, and the dummy doll and the tube are connected via a tube joint. The rotation speed of the liquid feed pump is adjusted so that artificial urine is discharged at 10 ml / sec. At this time, in order to obtain accurate test results, make sure that no liquid remains in the tube or tube joint. Also, in the preparation stage, the weight of the absorbent pad is measured with an electronic balance.

Next, mark the urethral meatus contact position on the absorbent pad with an oil-based pen or the like. The details of the urethral meatus contact position are as described above.

Next, align the urinary meatus of the dummy with the urinary meatus contact position of the absorbent pad, attach the absorbent pad to the dummy, and put the outer pants on the dummy doll from above the absorbent pad. Fix the absorbent pad to the dummy.

Next, after installing the dummy doll on a flat surface, the dummy doll is fixed in a state of being tilted 30 degrees from the flat surface. At this time, for example, the dummy doll is leaned against a wall or the like and adjusted to be tilted 30 degrees.

Next, using a jig for height adjustment, adjust the height of the widest part (corresponding to the buttocks) of the dummy to 232 mm from the above plane, and adjust the height of the upper part of the dummy to 210 mm from the above plane. match. These heights are measured and adjusted with a prepared ruler.

Next, a rubber sheet for preventing misalignment and a weight are placed on the rubber sheet, and the side surface of the weight is brought into contact with the side portion (corresponding to the flank) of the dummy doll, and the position and angle of the dummy doll during the test. Fix the dummy doll so that there is no deviation. At this time, it is confirmed by the protractor whether the angle between the dummy doll and the plane is adjusted to 30 degrees. This completes the preparation for the lateral decubitus absorption test.

Next, 150 ml of artificial urine is prepared in a polycup and injected into the absorbent pad from the urethral meatus of the dummy at a speed of 10 m / sec using a liquid feed pump. In addition. Generally, an adult in need of long-term care has a single micturition volume of 150 ml and a micturition rate of 10 ml / sec. In the present embodiment, the lateral decubitus position absorption amount test is performed by reproducing the urination amount and the urination rate. In this test, the amount of artificial urine injected at one time is 150 ml, and the artificial urine is injected in a plurality of times. The time required for one injection is 15 seconds, which is measured with a stopwatch. The test is terminated when artificial urine leaks from the absorbent pad, and the weight of the absorbent pad in the preparatory stage is subtracted from the weight of the absorbent pad after the test to determine the amount of artificial urine absorbed (g). Be measured.

FIG. 3 is a table showing the results of the lateral decubitus absorption test. As shown in FIG. 3, 14 absorbent pads were prepared in which the length from the central portion of the narrow absorber region to the tip of the groove on the front body region side was set every 5 mm from 160 mm to 225 mm, and a test was performed. It was. The table of FIG. 3 shows the items of "length (mm) from the center of the narrow region of the absorber to the tip of the groove", "absorption amount (g)", and "leakage suppression" from the right. In addition, the item of "absorption amount" indicates the absorption amount of artificial urine absorbed by the absorbent pad, and in the item of "leakage suppression", if the leakage can be suppressed, the symbol "○" is written and the leakage If it cannot be suppressed (when a leak occurs), the symbol "x" is displayed.

As shown in FIG. 3, the absorbent pad having a length from the center of the narrow absorber region to the tip of the groove of 165 mm or more and 215 mm or less can suppress leakage, and the tip of the groove from the center of the narrow region of the absorber can be suppressed. Leakage could not be suppressed by the absorbent pad having a length to the portion of 160 mm or less and 220 mm or more. From this result, in the absorbent pad, the length from the central portion of the absorbent body narrow region to the tip of the groove is preferably longer than 160 mm and shorter than 220 mm, and more preferably, the length from the central portion of the narrow absorber region to the groove is The length to the tip is 165 mm or more and 215 mm or less.

The absorbent pad 1 according to the present embodiment is provided with a groove 21 having a larger volume on the back side from the portion corresponding to the urethral meatus than on the abdominal side from the portion corresponding to the urethral meatus. Further, the length from the central portion of the narrow region of the absorber to the tip portion of the groove is 165 mm or more and 215 mm or less. According to the absorbent pad 1 according to the present embodiment, urine leakage can be suppressed even when the wearer urinates in the lateral decubitus position.

In addition, the absorbent pad is generally used even when the wearer is in a sitting position. Therefore, in the absorbent pad, it is required to suppress the leakage of the liquid in the sitting state. In this embodiment, the suppression of liquid leakage in the absorbent pad was evaluated by a sitting absorption test using a dummy doll. Preparations for the sitting absorption test are sitting dummy dolls, liquid feed pumps, tubes, tube joints, 200 ml poly cups, electronic balances, stopwatches, artificial urine, mattresses (thickness: 5 cm, hardness: 95 N). , Waterproof sheets, absorbent pads, outer pants for fixing absorbent pads. The artificial urine was prepared in the same manner as that used in the lateral decubitus absorption test. In this embodiment, a sitting position absorption test was performed using a female sitting dummy doll.

The dimensions of the dummy used in the sitting absorption test are 820 mm for the abdomen, 940 mm for the buttocks, 540 mm for the base of the foot, 495 mm for the base of the crotch, 485 mm for the thigh, and pass through the crotch from the navel. The length to the back was 665 mm.

First, a tube is set in the liquid feed pump, and the dummy doll and the tube are connected via a tube joint. The rotation speed of the liquid feed pump is adjusted so that artificial urine is discharged at 10 ml / sec. At this time, in order to obtain accurate test results, make sure that no liquid remains in the tube or tube joint. Also, in the preparation stage, the weight of the absorbent pad is measured with an electronic balance.

Next, mark the urethral meatus contact position on the absorbent pad with an oil-based pen or the like. The details of the urethral meatus contact position are as described above.

Next, align the urinary tract of the sitting dummy with the urinary ostium contact position of the absorbent pad, attach the absorbent pad to the sitting dummy, and put the outer pants on the absorbent pad into the sitting dummy. Put it on and fix the absorbent pad to the sitting dummy.

Next, a mattress is laid on a flat surface, waterproof sheets are laid on the mattress, and a sitting dummy doll is placed on the mattress in a sitting posture. This completes the preparation for the sitting absorption test.

Next, 150 ml of artificial urine is prepared in a polycup and injected into the absorbent pad from the urethral meatus of the dummy at a speed of 10 m / sec using a liquid feed pump. In this test, the amount of artificial urine injected at one time is 150 ml, and the artificial urine is injected in a plurality of times. The time required for one injection is 15 seconds, which is measured with a stopwatch. The test is terminated when artificial urine leaks from the absorbent pad, and the weight of the absorbent pad in the preparatory stage is subtracted from the weight of the absorbent pad after the test to determine the amount of artificial urine absorbed (g). Be measured.

FIG. 4 is a table showing the results of the sitting absorption test. As shown in FIG. 4, 14 absorbent pads were prepared and tested in which the length from the central portion of the narrow absorber region to the tip of the groove on the front body region side was set from 160 mm to 225 mm in 5 mm increments. It was. The table of FIG. 4 shows the items of "length (mm) from the center of the narrow region of the absorber to the tip of the groove", "absorption amount (g)", and "leakage suppression" from the right. In addition, the item of "absorption amount" indicates the absorption amount of artificial urine absorbed by the absorbent pad, and in the item of "leakage suppression", if the leakage can be suppressed, the symbol "○" is written and the leakage If it cannot be suppressed (when a leak occurs), the symbol "x" is displayed.

As shown in FIG. 3, the absorbent pad having a length from the center of the narrow absorber region to the tip of the groove of 165 mm or more and 215 mm or less can suppress leakage, and the tip of the groove from the center of the narrow region of the absorber can be suppressed. Leakage could not be suppressed by the absorbent pad having a length to the portion of 160 mm or less and 220 mm or more. From this result, in the absorbent pad, if the length from the central portion of the absorbent body narrow region to the tip of the groove is longer than 160 mm and shorter than 220 mm, leakage can be suppressed, and more preferably, the central portion of the absorbent body narrow region. The length from the groove to the tip of the groove is 165 mm or more and 215 mm or less.

The absorbent pad 1 according to the present embodiment is provided with a groove 21 having a larger volume on the back side from the portion corresponding to the urethral meatus than on the abdominal side from the portion corresponding to the urethral meatus. Further, the length from the central portion of the narrow region of the absorber to the tip portion of the groove is 165 mm or more and 215 mm or less. According to the absorbent pad 1 according to the present embodiment, urine leakage can be suppressed even when the wearer urinates in a sitting posture.

Next, the absorbent pad according to the comparative example in which the groove extends to the anterior side (front body area side) of the urinary meatus corresponding area, and the groove extends to the anterior side (front body area side) of the urethral meatus corresponding area. An absorbent pad 1 according to the present embodiment which does not exist was prepared, and a lateral decubitus position absorption test and a sitting position absorption test were performed by the same method as described above. FIG. 5 shows the results of the lateral decubitus absorption test, and FIG. 6 shows the results of the reigning absorption test. The tables of FIGS. 5 and 6 show the items of "whether or not the groove extends in front of the urethral meatus corresponding area", "absorption amount (g)", and "leakage suppression" from the right. In addition, the item of "absorption amount" indicates the absorption amount of artificial urine absorbed by the absorbent pad, and in the item of "leakage suppression", if the leakage can be suppressed, the symbol "○" is written and the leakage If it cannot be suppressed (when a leak occurs), the symbol "x" is displayed.

As shown in FIGS. 5 and 6, the absorbent pad according to the comparative example in which the groove extends in front of the urethral meatus corresponding area cannot suppress leakage, and the groove is formed in front of the urethral meatus corresponding area. The non-extending absorbent pad according to this embodiment was able to suppress leakage.

As described above, in the absorbent pad 1 according to the present embodiment, since the groove 21 does not extend in front of the urethral meatus corresponding area 37, urine flows into the groove 21 and is more than the urethral meatus corresponding area 37. It diffuses to the back body region 7 side and can suppress the leakage of urine from the abdominal side.

Although the absorbent pad 1 has been exemplified in the above-described embodiment and the embodiment, the above-mentioned configuration can be applied to other types of absorbent articles. As absorbent articles to which the above configuration can be applied, for example, various forms of absorbent articles with gathers such as pants-type disposable diapers, tape-type disposable diapers, urine pads, and light incontinence pads, and flat absorption without gathers. Sexual articles can be mentioned.

1 ・ ・ Absorbent pad: 3 ・ ・ Front body area: 5 ・ ・ Inseam area: 7 ・ ・ Back body area: 11 ・ ・ Top sheet: 13 ・ ・ Back sheet: 14 ・ ・ Absorber: 15 ・ ・ Upper layer absorption Body: 17 ... Lower absorber: 21 ... Groove: 23L ... SAP layer: 23R ... SAP layer: 30 ... Core wrap sheet: 31 ... Upper sheet: 33 ... Lower sheet: 37 ... Urinary meatus Corresponding area

Claims (8)

An absorbent article having a front body area located on the abdomen side of the wearer, an inseam area located on the inseam side, and a back body area located on the back side when worn.
A liquid-permeable top sheet placed on the side facing the skin when worn,
A liquid-impermeable back sheet arranged on the opposite side of the skin-facing surface and
An absorber arranged between the top sheet and the back sheet and having a gourd shape in a top view,
A groove extending in the longitudinal direction of the absorber and formed in the central portion in the width direction of the absorber, including a region corresponding to the urethral meatus on the top sheet side of the absorber.
With
The groove extends from the central portion of the gourd-shaped narrow region of the absorber to the front body region side by 165 mm or more and 215 mm or less.
The region corresponding to the urethral meatus exists in a range of 100 mm or more and 160 mm or less from the tip of the groove on the front body region side.
The groove in the region corresponding to the urethral meatus has a width of 15 mm or more and 40 mm or less and a depth of 6 mm or more and 10 mm or less.
The groove does not extend on the front body region side of the urethral meatus corresponding region.
The groove extends on the back body region side of the urethral meatus corresponding region.
The groove on the back body region side of the urethral meatus region has a width of 10 mm or more and 35 mm or less and a depth of 5 mm or more and 9 mm or less.
The absorber contains pulp and
In the absorber, the basis weight of the pulp in the peripheral portion of the urinary meatus corresponding region is 400 g / m ² or more and 560 g / m ² or less, and the basis weight of the pulp in the region other than the peripheral portion is 350 g / m ^2. More than 530 g / m ² or less,
Absorbent article. The absorber has a layer containing pulp in a region overlapping the groove on the back body region side of the urethral meatus corresponding region.
The absorbent article according to claim 1. The absorber has a layer containing pulp in a region overlapping the groove in the region corresponding to the urethral meatus.
The absorbent article according to claim 1 or 2. A SAP layer arranged outside the groove in the width direction and containing a plurality of particles of the highly absorbent polymer is further provided.
The absorbent article according to any one of claims 1 to 3. In the SAP layer, the amount of SAP is larger in the region closer to the groove.
The absorbent article according to claim 4. The basis weight of SAP in the SAP layer is 100 g / m ² or more and 200 g / m ² or less.
The amount of urine retained in the SAP layer is 130 g or more and 350 g or less.
The absorbent article according to claim 4 or 5. The absorber has an upper layer absorber arranged on the top sheet side and a lower layer absorber arranged on the back sheet side.
The groove is formed so as to penetrate the upper layer absorber in the thickness direction.
The SAP layer is arranged between the upper layer absorber and the lower layer absorber.
The absorbent article according to any one of claims 4 to 6. In the region adjacent to the groove, a SAP layer containing a plurality of highly absorbent polymer particles is not formed.
The absorbent article according to any one of claims 1 to 7.

Images