JP7338293B2 - absorbent article - Google Patents

Description

The present invention relates to absorbent articles.

Absorbent articles such as disposable diapers, absorbent pads (urine pads) and sanitary products are known. Absorbent articles are made of pulp or super absorbent polymer (SAP) and have an absorbent body that absorbs liquids such as urine and bodily fluids. Patent Document 1 discloses an upper absorbent body, a lower absorbent body, and an SAP layer disposed between the upper absorbent body and the lower absorbent body and containing a plurality of super absorbent polymers (SAP). Absorbent articles are described.

WO2016/114209

In general, an absorbent article is provided with three-dimensional gathers in order to suppress lateral leakage in which liquid such as urine leaks outward in the width direction. The three-dimensional gathers have liquid impermeability and can suppress side leakage of liquid. However, if the SAP layer exists outside the three-dimensional gathers in the width direction of the absorbent article, the three-dimensional gathers cannot suppress lateral leakage of liquid when liquid leaks from the outside of the SAP layer in the width direction. Patent Literature 1 does not describe the positional relationship between the three-dimensional gathers and the SAP layer, and there is a possibility that side leakage of liquid cannot be suppressed in conventional absorbent articles.

Accordingly, an object of the present invention is to provide an absorbent article capable of suppressing lateral leakage of liquid.

In order to solve the above problems, the present invention includes an SAP layer arranged inside the standing lines of the pair of three-dimensional gathers.

Specifically, the present invention is an absorbent article comprising a front body region located on the abdomen side of the wearer when worn, a crotch region located on the crotch side, and a back body region located on the back side, and a flat An absorbent article having a gourd-shaped appearance, the narrowest region of the gourd-shaped shape being located in the crotch region, wherein the liquid-permeable top is arranged on the side facing the skin when worn. a sheet, a liquid-impermeable back sheet disposed on the opposite side of the skin-facing surface, an absorbent body disposed between the top sheet and the back sheet, and along the longitudinal direction of the absorbent body a pair of vertical gathers extending and connected to the top sheet, wherein one end of the vertical gathers is a fixed end forming a standing line and the other end is a free end, and the standing line is It exists at a position of 150 mm or more and 220 mm or less from the center of the width direction of the absorbent body, and the absorbent body is composed of at least an upper absorbent body arranged on the top sheet side and a lower absorbent body arranged on the back sheet side in the crotch region. and a body, wherein in plan view, ear portions that bulge outward from the crotch region and are located on the outer side of the standing line are formed in the back body region, and the ear portions are formed in the crotch region An SAP layer integral with the upper absorbent body, disposed between the upper absorbent body and the lower absorbent body, and containing a plurality of superabsorbent polymer particles, wherein the SAP layer comprises the absorbent body. The SAP layer extends along the longitudinal direction and has an inner end located at a distance of 15 mm or more and 27.5 mm or less from the width direction center of the absorbent body toward the width direction end of the absorbent body, and the SAP layer includes the absorbent body. from the center in the width direction of the absorber toward the end in the width direction of the absorbent body, the width of the SAP layer is 35 mm or more and 55 mm or less, and the width of the liquid in the SAP layer is The total absorption amount is 180 ml or more and 600 ml or less, and the upper layer absorbent body contains SAP and pulp, and in the upper layer absorbent body, the amount of SAP is 16 g or more and 26 g or less, and the amount of pulp is 27 g or more and 42 g or less. In a plan view, the lower absorbent core does not overlap the selvages, the lower absorbent core contains pulp, and the amount of pulp in the lower absorbent core is 7 g or more and 28 g or less.

In the above absorbent article, in the SAP layer, the basis weight of SAP may be 100 g/m ² or more and 200 g/m ² or less, and the amount of SAP may be 4.2 g or more and 9.5 g or less.

In the above absorbent article, the ears may have pulp, and the basis weight of the pulp in the ears may be 250 g/m ² or more and 310 g/m ² or less.

In the above absorbent article, the lower absorbent core may have a rectangular shape in plan view.

With the absorbent article described above, side leakage of liquid can be suppressed.

FIG. 1 is a plan view of an absorbent pad. FIG. 2 is a cross-sectional view of an absorbent pad. FIG. 3 is a table showing the results of sensory tests on absorbent pads. FIG. 4 is a table showing the results of sensory tests on absorbent pads. FIG. 5 is a plan view of an absorbent pad. FIG. 6 is a cross-sectional view of an absorbent pad.

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

<Embodiment 1>
FIG. 1 is a plan view of an absorbent pad 1 according to Embodiment 1 (an example of the "absorbent article" referred to in the present application) viewed from the side facing the skin. The absorbent pad 1 is used to absorb and retain liquid such as urine, and can be used alone or can be used by being layered inside a disposable diaper. The absorbent pad 1 includes a front body region 3 positioned on the abdomen side of the wearer when worn, a crotch region 5 positioned on the crotch, and a back body region 7 positioned on the back side. The absorbent pad 1 is divided into a front body region 3, a crotch region 5 and a back body region 7 when viewed in the longitudinal direction. The direction perpendicular to the longitudinal direction is the width direction (lateral direction) of the absorbent pad 1 . The absorbent pad 1 has a gourd shape in which the crotch region 5 is constricted in plan view. Thus, the absorbent pad 1 has the gourd-shaped narrowest region located within the crotch region 5 .

In the following description, when the absorbent pad 1 is viewed in the longitudinal direction, the side of the front body region 3 will be referred to as "front", "front side", "front", or "abdominal side". The side of the body region 7 is referred to as "rear", "rear side", "back" or "back side", and the left side is referred to as "left", "left side" or "left side" relative to the back side toward the front side. The relative right side from the rear side to the front side is referred to as "right", "right side", or "right side". Note that 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. A direction perpendicular to the front, rear, left, and right directions is the thickness direction (height direction) of the absorbent pad 1 .

As shown in FIG. 1, the absorbent pad 1 has a top sheet 11 arranged on the side facing the skin when worn (in a worn state). The top sheet 11 is a portion (skin-facing surface) that contacts the wearer's skin when the absorbent pad 1 is worn, and is made of a liquid-permeable material that allows liquid such as urine to pass therethrough. Specifically, a woven fabric, a nonwoven fabric, a porous film, or the like is used for the top sheet 11 . The nonwoven fabric may be made of fibers of thermoplastic resins such as polypropylene, polyethylene, polyester, nylon, etc. that have undergone hydrophilic treatment, or air-through nonwoven fabrics, point-bonded nonwoven fabrics, spunbonded nonwoven fabrics, melt-blown nonwoven fabrics, etc. may be used. good too.

The absorbent pad 1 also has a back sheet 13 arranged on the opposite side of the skin facing surface when worn. The back sheet 13 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 pass therethrough. 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 to prevent stuffiness in the worn state while maintaining liquid impermeability. Films are preferably used.

The top sheet 11 and the back sheet 13 are joined together at their peripheral edge portions. The absorbent pad 1 also has an absorbent body 14 which is arranged between the top sheet 11 and the back sheet 13 and absorbs liquid such as urine. The absorbent body 14 has an upper absorbent body 15 arranged on the top sheet 11 side and a lower absorbent body 17 arranged on the back sheet 13 side. The upper absorbent body 15 has approximately the same gourd shape as the absorbent pad 1 in plan view. The lower absorbent core 17 is arranged below the upper absorbent core 15 when viewed from the top sheet 11 side, and has a rectangular shape (rectangular shape) with long sides extending in the longitudinal direction of the absorbent pad 1 in plan view. ing. Further, the upper layer absorbent body 15 is formed to be larger than the lower layer absorbent body 17 in plan view. The absorbent pad 1 is relatively large when liquid such as urine is excreted, and the upper absorbent body 15 arranged on the top sheet 11 side can rapidly absorb urine. The longitudinal direction of the absorbent core 14 is the longitudinal direction of the upper absorbent core 15 and the lower absorbent core 17 and coincides with the longitudinal direction of the absorbent pad 1 . The width direction of the absorbent body 14 is the width direction of the upper layer absorbent body 15 and the lower layer absorbent body 17 and coincides with the width direction of the absorbent pad 1 .

For the upper absorbent body 15 and the lower absorbent body 17, fluff pulp (hereinafter referred to as "pulp") obtained by pulverizing a fibrous material such as softwood, super absorbent polymer (SAP), A hydrophilic sheet or the like or a combination thereof is used. Moreover, SAP absorbs liquid about 10 to 100 times its own weight (60 times in this embodiment). For 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, in the present embodiment, the upper absorbent body 15 contains pulp.

The absorbent pad 1 also has an upper layer lightening groove 21 formed through the upper absorbent body 15 in the thickness direction. Upper layer lightening groove 21 is formed to extend in the longitudinal direction of upper layer absorbent body 15 . Further, the upper layer lightening groove 21 is formed substantially in the widthwise center of the upper layer absorbent body 15 . In plan view, the upper layer lightening groove 21 has a rectangular shape with both front and rear ends formed in an arc shape. The front end of the upper layer lightening groove 21 is located in the middle of the front body region 3 , and the rear end of the upper layer lightening groove 21 is located in the front of the back body region 7 . Further, the upper layer lightening groove 21 has a constant width. For example, the width is 20 mm or more and 35 mm or less. Moreover, the length of the upper layer lightening groove 21 is formed to be 245 mm or more and 355 mm or less. The absorbent pad 1 having upper layer lightening grooves 21 of this size is suitable for an adult urine pad.

In addition, in the absorbent pad 1, an area 37 surrounded by a circle shown in FIG. 1 is defined as a urethral opening contact position where the wearer's urethral opening contacts. A region 37 is defined on the top sheet 11 within the crotch region 5 and at the widthwise central portion of the absorbent pad 1 . Also, when viewing the absorbent pad 1 in the thickness direction, the portion overlapping the region 37 corresponds to the urethral meatus. In other words, the site corresponding to the urethral meatus is the urination position. The upper layer lightening groove 21 is formed including a portion corresponding to the urethral opening so that the urine excreted by the wearer can easily flow in. When the absorbent pad 1 is viewed from above, the urethral opening contact position and the portion corresponding to the urethral opening are the same position, and the longitudinal direction of the upper absorbent core 15 extends forward from the rear end of the upper absorbent core 15 . defined at 60% of the height. For example, when the longitudinal length of the upper layer absorbent body 15 is 500 mm, the position 300 mm forward from the rear end of the upper layer absorbent body 15 is defined as the position corresponding to the urethral meatus contact position and the urethral meatus. . The right and left ends of the crotch region 5 are formed with R-cuts cut out in an arc shape, and the length of the R-cut forming part in the front-rear direction is within 30 mm, and the narrowest width in the width direction of the upper absorbent core 15 is provided. When the part is the part where the R cut is formed, the intersection of a straight line connecting the left end and the right end of the narrowest part and a straight line passing through the widthwise center of the upper absorbent core 15 is defined as the urethral opening contact position. and the site corresponding to the urethral meatus. In addition, in this embodiment, the part corresponding to the urethral opening is arranged in the crotch region 5 covering the pubic part of the wearer.

In addition, the upper layer lightening groove 21 may be formed in a polygonal shape or an elliptical shape instead of a rectangular shape in plan view.

Liquid such as urine excreted by the wearer flows through the upper layer cutout groove 21 and is diffused. Further, liquid such as urine excreted on the upper layer absorbent body 15 can be guided to the lower layer absorbent body 17 through the upper layer lightening grooves 21 . Thus, the absorbent pad 1 according to this embodiment can absorb liquid by the absorbent body 14 having the upper absorbent body 15 and the lower absorbent body 17 .

The absorbent pad 1 also has SAP layers 23L and 23R arranged between the upper absorbent body 15 and the lower absorbent body 17. As shown in FIG. The SAP layers 23L and 23R are formed by gathering a plurality of superabsorbent polymer (SAP) particles. The SAP layers 23L and 23R contain a plurality of SAP particles, and are capable of absorbing and retaining liquid introduced between the upper layer absorbent body 15 and the lower layer absorbent body 17 . As shown in FIG. 1, the SAP layer 23L is arranged on the left side of the upper layer lightening groove 21, and the SAP layer 23R is arranged on the right side of the upper layer lightening groove 21. As shown in FIG. Thus, the SAP layers 23L and 23R extend along the longitudinal direction of the absorbent body 14 and are arranged on both sides of the upper layer lightening groove 21. As shown in FIG. Moreover, in plan view, the SAP layers 23L and 23R are formed in a rectangular shape. Note that the SAP layers 23L and 23R may be formed in a polygonal shape or an elliptical shape instead of a rectangular shape in plan view. By providing the SAP layers 23L and 23R, the absorbent pad 1 can increase the liquid absorption capacity as a whole.

The SAP layers 23L, 23R extend along the longitudinal direction of the absorber 14. As shown in FIG. In FIG. 1, an imaginary straight line c represents the centers of the absorbent pad 1 and the absorbent body 14 in the width direction. Note that the centers in the width direction of the absorbent pad 1 and the absorbent body 14 are aligned. The SAP layers 23L and 23R have inner ends positioned at a distance of 15 mm or more and 27.5 mm or less from the center in the width direction of the absorbent body 14 toward the end parts in the width direction of the absorbent body 14 . In FIG. 1, the distance d1 indicates the distance from the widthwise center of the absorbent body 14 to the inner ends of the SAP layers 23L and 23R, and is 15 mm or more and 27.5 mm or less.

In addition, the SAP layers 23L and 23R have outer ends located at a distance of 60 mm or more and 72.5 mm or less from the center in the width direction of the absorbent body 14 toward the end parts in the width direction of the absorbent body 14 . In FIG. 1, the distance d2 indicates the distance from the widthwise center of the absorbent body 14 to the outer ends of the SAP layers 23L and 23R, and is 60 mm or more and 72.5 mm or less.

The SAP layers 23L and 23R are longer than the upper layer lightening groove 21, and the length in the longitudinal direction of the upper layer lightening groove 21 is included in the length in the longitudinal direction of the SAP layers 23L and 23R. Further, when the absorbent pad 1 is an adult urine absorbing pad, each width of the SAP layers 23L, 23R is 35 mm to 55 mm, and each length of the SAP layers 23L, 23R is 470 mm to 555 mm.

Thus, the absorbent pad 1 according to this embodiment includes the upper absorbent body 15, the lower absorbent body 17, the upper layer lightening grooves 21, and the SAP layers 23L and 23R. The longitudinal directions of the upper absorbent body 15, the lower absorbent body 17, the upper lightening groove 21 and the SAP layers 23L and 23R are aligned. Further, the upper layer lightening groove 21 and the SAP layers 23L and 23R are arranged substantially parallel to each other.

The absorbent pad 1 also includes a pair of liquid-impermeable side sheets 40 joined to both ends in the width direction of the top sheet 11 on the side facing the skin. The side sheets 40 extend in the longitudinal direction of the absorbent body 14 (absorbent pad 1 ), and the front-rear ends of the side sheets 40 coincide with the front-rear ends of the top sheet 11 . In addition, the side sheet 40 has three-dimensional gathers 40a (see FIG. 2) that are formed along both width direction side edges of the top sheet 11 and rise from the dashed-dotted line 42 toward the wearer's skin facing side when worn. there is A dashed-dotted line 42 indicates an upright line of the three-dimensional gathers 40a. The one-dot chain line 42 is hereinafter referred to as the "upright line 42". The side sheet 40 is not joined to the top sheet 11 on the inside from the standing line 42, and the part standing from the top sheet 11 inside the standing line 42 becomes the three-dimensional gathers 40a. Details of the side sheets 40 and the three-dimensional gathers 40a will be described later.

The standing line 42 exists at a position of 150 mm or more and 220 mm or less from the center of the absorbent body 14 in the width direction. In FIG. 1, the distance d3 indicates the distance from the widthwise center of the absorbent body 14 to the standing line 42, and is 150 mm or more and 220 mm or less. Further, as described above, the SAP layers 23L and 23R have outer ends located at a distance of 60 mm or more and 72.5 mm or less from the width direction center of the absorbent body 14 toward the width direction ends of the absorbent body 14. In the absorbent pad 1 according to the embodiment, the SAP layers 23L and 23R are arranged inside the standing lines 42 of the pair of three-dimensional gathers 40a when viewed in the width direction.

Ear portions 44 that bulge outward from the crotch region 5 and are positioned outward from the standing line 42 in plan view are formed in the back body region 7 . The ear portion 44 is integrated with the upper absorbent core 15 in the crotch region 5 . In other words, the ear part 44 is a part of the upper absorbent core 15 that exists outside the standing line 42 in the crotch region 5 . Note that the ear portions 44 may be connected to the upper absorbent core 15 so as to be integrated therewith. In this case, the ear portions 44 are made of the same material as the upper absorbent body 15 .

Further, in this embodiment, the total amount of liquid absorbed by the SAP layers 23L and 23R is 180 ml or more and 600 ml or less. In this embodiment, the SAP absorbs 60 times its own weight in liquid. The upper absorbent body 15 contains SAP and pulp. In the upper absorbent body 15, the amount of SAP is 16 g or more and 26 g or less, and the amount of pulp is 27 g or more and 42 g or less. Further, the lower absorbent core 17 does not overlap the ear portions 44 in plan view. In addition, the lower absorbent body 17 has pulp. The amount of pulp in the lower absorbent body 17 is 7 g or more and 28 g or less.

In the SAP layers 23L and 23R, the SAP basis weight is 100 g/m ² or more and 200 g/m ² or less, and the SAP amount is 4.2 g or more and 9.5 g or less.

Ears 44 also comprise pulp. The basis weight of the pulp in the selvage 44 is 250 g/m ² or more and 310 g/m ² or less.

FIG. 2 is a cross-sectional view of the absorbent pad 1 shown in FIG. 1 taken along line AA. In FIG. 2, in order to make each component of the absorbent pad 1 easy to understand, a gap is provided between each component, but in reality, almost no gap is formed between each component. .

As shown in FIG. 2, the absorbent pad 1 according to this embodiment includes a core wrap sheet 30 (not shown in FIG. 1) that wraps the entire absorbent body 14. As shown in FIG. The core wrap sheet 30 has an upper layer sheet 31 arranged on the upper layer absorbent body 15 side and a lower layer sheet 33 arranged on the lower layer absorbent body 17 side. The upper sheet 31 is arranged between the top sheet 11 and the upper absorbent body 15 , and the lower sheet 33 is arranged between the back sheet 13 and the lower absorbent body 17 . In addition, the lower layer sheet 33 has a portion that covers the side surfaces of the upper layer absorbent body 15 and the lower layer absorbent body 17, and is routed between the top sheet 11 and the upper layer absorbent body 15. It is joined to the upper layer sheet 31 between the upper layer absorbent body 15 and the upper layer sheet 31 . In this manner, the upper layer sheet 31 and the lower layer sheet 33 are joined together to form an integral body, and wrap the upper layer absorbent body 15 and the lower layer absorbent body 17 as a whole. 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 absorbent body 15 or the lower layer absorbent body 17 or between the back sheet 13 and the lower layer absorbent body 17. may In the absorbent pad 1 according to this embodiment, by wrapping the entire absorbent body 14 with the core wrap sheet 30, liquid such as urine can be diffused over the entire surface of the absorbent body 14 and absorbed by the entire absorbent body 14. can.

The SAP layers 23</b>L, 23</b>R are formed by scattering SAP particles on the lower absorbent body 17 . Further, the SAP layers 23L and 23R are sandwiched between the upper layer absorbent body 15 and the lower layer absorbent body 17. As shown in FIG. Therefore, even when the absorbent pad 1 is moved by the wearer's movement, the particles of SAP contained in the SAP layers 23L and 23R move below the upper layer lightening grooves 21, or the lower layer absorbent body 17 It can prevent falling outside.

As described above, the absorbent pad 1 according to the present embodiment includes the top sheet 11, the upper layer sheet 31, part of the lower layer sheet 33, the upper absorbent body 15, and the SAP layer 23L when viewed in the thickness direction from the side facing the skin. , 23R, the lower absorbent body 17, a part of the lower sheet 33, and the back sheet 13 are laminated in this order. In addition, by joining the peripheral edge 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 absorbent body 15, the SAP layers 23L and 23R, and the lower layer absorbent body 17 are combined into the top sheet 11 and the back sheet. A sheet 13 surrounds and seals the periphery.

Further, as described above, a pair of side sheets 40 are joined to both ends in the width direction of the top sheet 11 on the skin facing side. A liquid-impermeable sheet is used for the side sheet 40 . For example, the side sheet 40 may be a nonwoven fabric sheet manufactured by a method such as card embossing or spunbonding, or a sheet obtained by applying a water-repellent finish to a woven fabric or nonwoven fabric. The side seat 40 has three-dimensional gathers 40a that stand up on the wearer's skin side when worn. An elastic member (not shown) such as thread rubber is attached to the tip of the three-dimensional gathers 40a, and when the absorbent pad 1 is folded in the longitudinal direction during wearing, the elastic members contract and the three-dimensional gathers 40a are formed. It stands on the wearer's skin side with the standing line 42 as a starting point. One end of the three-dimensional gathers 40a is a fixed end that forms the standing line 42, and the other end is a free end that is not fixed to any part. Thus, when worn, the three-dimensional gathers 40a stand on the wearer's skin side with the standing line 42 as a starting point, thereby suppressing lateral leakage of liquid such as urine.

When viewed in the width direction of the absorbent pad 1, the SAP layers 23L and 23R are arranged inside the standing lines 42 of the pair of three-dimensional gathers 40a. The SAP layers 23L, 23R are provided to absorb and retain liquid such as urine. For example, when the wearer wearing the absorbent pad 1 is lying on his or her back on the bed, the SAP layers 23L and 23R in the back body region 7 are sandwiched between the wearer and the bed, and the absorbent body 14 and the SAP layer 23R are sandwiched between the wearer and the bed. Liquid absorbed by the layers 23L, 23R may be squeezed out. However, in the absorbent pad 1 according to the present embodiment, since the SAP layers 23L and 23R are arranged inside the standing lines 42 of the pair of three-dimensional gathers 40a, water is squeezed out from the SAP layers 23L and 23R. Even so, the pair of three-dimensional gathers 40a can prevent the moisture from leaking to the outside in the width direction. Thereby, the absorbent pad 1 according to the present embodiment can suppress lateral leakage of liquid.

By the way, in the absorbent pad described in Patent Document 1, the positional relationship between the three-dimensional gathers and the SAP layer is not defined, and there is a possibility that side leakage of liquid cannot be suppressed. On the other hand, in the absorbent pad 1 according to the present embodiment, the SAP layers 23L and 23R are arranged inside the standing lines 42 of the pair of three-dimensional gathers 40a, so lateral leakage of liquid can be suppressed.

Next, the absorbent pad 1 according to the present embodiment was subjected to a side-lying absorption test to evaluate the side leakage suppressing performance. In this embodiment, an absorbent pad was attached to a dummy, and the dummy was placed in a lateral recumbent position to conduct a lateral recumbent absorption test. Preparations for the side-lying position absorption test include a dummy, a liquid pump, a tube, a tube joint, a 200 ml plastic cup, an electronic balance, a stopwatch, artificial urine, a ruler, a protractor, a weight, a rubber sheet to prevent misalignment, and absorbency. Pads, outer pants for fixing absorbent pads, and jigs 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.

The dimensions of the dummy doll are 760 mm around the abdomen, 850 mm around the buttocks, 460 mm around the base of the legs, 390 mm around the base of the legs, 350 mm around the thighs, and 350 mm around the thighs. The length from the crotch to the back is 650mm. In this embodiment, female dummy dolls are used.

First, a tube is attached to the liquid-sending pump, and the tube is connected to the dummy through a tube joint. The number of rotations of the liquid-sending pump is adjusted so that the artificial urine is discharged at 10 ml/sec. At this time, in order to obtain an accurate test result, 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, a mark is made with a permanent marker or the like on the position of the absorbent pad that abuts the urethral opening. The details of the urethral opening contact position are as described above.

Next, the urethral opening of the dummy is aligned with the position of the absorbent pad contacting the urethral opening, the absorbent pad is attached to the dummy, and outer pants are put on the dummy on the absorbent pad. Secure the absorbent pad to the dummy.

Next, after placing the dummy on a flat surface, the dummy is fixed while being tilted 30 degrees from the flat surface. At this time, for example, the dummy is leaned against a wall or the like and adjusted so as to be tilted by 30 degrees.

Next, using a height adjustment jig, the height of the widest part of the dummy (equivalent to the buttocks) is adjusted to 232 mm from the above plane, and the height of the upper part of the dummy is adjusted 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. Fix the dummy doll so that there is no deviation. At this time, a protractor is used to check whether the angle between the dummy and the plane is adjusted to 30 degrees. You are now ready for the lateral resorption test.

Next, 150 ml of artificial urine is prepared in a plastic cup and injected into the absorbent pad through the urethral opening of the dummy at a speed of 10 m/sec using a liquid pump. Generally, an adult who requires nursing care urinates 150 ml at a time, and urinates at a urination rate of 10 ml/sec. In this embodiment, the side leakage test is performed by reproducing the urine output and the urine output speed. In this test, the amount of artificial urine to be injected at one time is 150 ml, and the artificial urine is injected in 4 divided doses. The time required for one injection is 15 seconds, and this time is measured with a stopwatch.

As a result of the lateral recumbent absorption test, the absorbent pad 1 according to the present embodiment was able to suppress lateral leakage of artificial urine. In the absorbent pad 1 according to this embodiment, the SAP layers 23L and 23R are arranged inside the standing lines 42 of the pair of three-dimensional gathers 40a. The pair of three-dimensional gathers 40a can prevent the moisture from leaking to the outside in the width direction.

In addition, since the absorbent pad 1 according to the present embodiment has a pair of three-dimensional gathers 40a arranged inside the ear portions 44, liquid such as urine is prevented from flowing from the top sheet 11 side to the ear portions 44, It is possible to prevent the liquid from reaching the ears 44 . As a result, the absorbent pad 1 can suppress lateral leakage of urine from the ear portions 44 even when the wearer is in the lateral recumbent position and the wearer's weight is applied to the ear portions 44 . In addition, since the cared person relatively frequently assumes the lateral recumbent position, the absorbent pad 1 can suitably suppress the side leakage of urine even when worn by the cared person. Thus, the absorbent pad 1 according to this embodiment is suitable for nursing care.

In addition, in the absorbent pad 1 according to the present embodiment, the total amount of liquid absorbed by the SAP layers 23L and 23R is 180 ml or more and 600 ml or less. It is possible to suppress the flow of urine to the outside of 23R. Note that when the total amount of liquid absorbed by the SAP layers 23L and 23R is 600 ml, the absorbent pad 1 absorbs the SAP after the wearer urinates 150 ml of urine four times (after urinating a total of 600 ml of urine). It is possible to prevent urine from flowing outside the layers 23L and 23R.

Next, two types of sensory tests were conducted on the absorbent pads. In the first sensory test (hereinafter referred to as "sensory test 1"), the feeling of wearing each absorbent pad with different basis weights of SAP in the SAP layer (corresponding to the SAP layers 23L and 23R in FIGS. 1 and 2) was evaluated. In sensory test 1, 30 adults were used as subjects, each subject wore an absorbent pad without wearing clothes, fixed the absorbent pad with outer pants, and then pressed the SAP layer with the buttocks. Each subject is put in a state of lying on his/her back, and the presence or absence of discomfort in the SAP layer is evaluated by each subject. When 25 or more of the 30 subjects judged that the SAP layer did not cause discomfort, the result of sensory test 1 was regarded as no discomfort. On the other hand, if 25 or more of the 30 subjects judged that the SAP layer had a sense of discomfort, the result of the sensory test 1 was regarded as having a sense of discomfort.

3 is a table showing the results of sensory test 1. FIG. In sensory test 1, 7 absorbent pads were produced and each absorbent pad was numbered "1" to "7". The "No." column in the table of Fig. 3 indicates the number assigned to each absorbent pad. As shown in the table of FIG. 3, the "1" absorbent pad had a SAP layer with a SAP amount of 6 g and a SAP layer with a SAP basis weight of 142 g/m ² . The "2" absorbent pad had a SAP layer with a SAP amount of 7 g and a SAP layer with a SAP basis weight of 203 g/m ² . The "3" absorbent pad had a SAP layer with a SAP amount of 8 g and a SAP layer with a SAP basis weight of 189 g/m ² . The "4" absorbent pad had a SAP layer with a SAP amount of 9.5 g and a SAP layer with a SAP basis weight of 200 g/m ² . The "5" absorbent pad had a SAP layer with a SAP amount of 9.5 g and a SAP layer with a SAP basis weight of 225 g/m ² . The "6" absorbent pad had a SAP layer with a SAP amount of 9.8 g and a SAP layer with a SAP basis weight of 198 g/m ² . The "7" absorbent pad had a SAP layer with a SAP amount of 10 g and a SAP layer with a SAP basis weight of 236 g/m ² .

The column of "sensory test results" in the table of FIG. 3 shows the results of the sensory test 1. If the result of the sensory test 1 is no sense of discomfort, the corresponding column is marked with "◯", and if the result of the sensory test 1 is the feeling of discomfort, the corresponding column is marked with "x". As shown in the table of FIG. 3, the results of the sensory test 1 of the absorbent pads of "1", "3" and "4" were not uncomfortable, and the absorbent pads of "2", "5" to "7" The result of sensory test 1 of the pad is that there is a sense of discomfort.

The greater the amount of SAP in the SAP layer, the more likely the wearer will feel discomfort. As can be seen from the results of sensory test 1, when the amount of SAP is 9.5 g or less, discomfort can be eliminated. Considering the amount of liquid absorbed by the SAP layer, the amount of SAP in the SAP layer is set to 4.2 g or more.

In addition, the larger the SAP basis weight in the SAP layer, the more likely the wearer feels uncomfortable. As can be seen from the result of the sensory test 1, when the SAP basis weight is 200 g/m ² or less, the sense of discomfort can be eliminated. Considering the amount of liquid absorbed by the SAP layer, the SAP basis weight of the SAP layer is set to 100 g/m ² or more.

In the absorbent pad 1 according to this embodiment, in the SAP layers 23L and 23R, the basis weight of SAP is 100 g/m ² or more and 200 g/m ² or less, and the amount of SAP is 4.2 g or more and 9.5 g or less. According to the absorbent pad 1 having such a configuration, lateral leakage of liquid can be suppressed while reducing uncomfortable feeling when worn.

Next, in the second sensory test (hereinafter referred to as "sensory test 2"), the wearing feeling of each absorbent pad with different pulp basis weights in the ears (corresponding to the ears 44 in FIG. 1) was evaluated. did. In the sensory test 2, 30 adults were used as subjects, and each subject wore an absorbent pad without wearing clothes, fixed the absorbent pad with outer pants, and then pressed the ear with the buttocks. The subject is laid down on his/her side (lateral recumbent position), and the presence or absence of discomfort in the ear is evaluated by each subject. When 25 or more of the 30 subjects judged that there was no sense of discomfort in the ear, the result of the sensory test 2 was regarded as no sense of discomfort. On the other hand, when 25 or more of the 30 subjects judged that the SAP layers 23L and 23R had a sense of discomfort, the result of the sensory test 2 was determined to have a sense of discomfort.

4 is a table showing the results of sensory test 2. FIG. In sensory test 2, seven absorbent pads were produced and each absorbent pad was numbered "1" to "7". The "No." column in the table of Fig. 5 indicates the number assigned to each absorbent pad. As shown in the table of FIG. 5, the absorbent pad of "1" had a pulp basis weight of the selvage of 253 g/m ² . The "2" absorbent pad had a pulp basis weight of 299 g/m ² in the selvage. The "3" absorbent pad had a pulp basis weight of 308 g/m ² in the selvage. The "4" absorbent pad had an edge pulp basis weight of 313 g/ ^m2 . The "5" absorbent pad had an ear pulp basis weight of 316 g/ ^m2 . The "6" absorbent pad had a pulp basis weight of 320 g/m ² in the selvage. The "7" absorbent pad had an edge pulp basis weight of 336 g/ ^m2 .

The column of "sensory test results" in the table of FIG. 4 shows the results of sensory test 2. If the result of the sensory test 2 is no sense of discomfort, the corresponding column is marked with "◯", and if the result of the sensory test 2 is that there is a sense of discomfort, the corresponding column is marked with an "x". As shown in the table of FIG. 4, the results of the sensory test 2 of the absorbent pads of "1" to "3" are not uncomfortable, and the results of the sensory test 2 of the absorbent pads of "4" to "7" are There is a sense of incongruity.

From the results of the sensory test 2, it can be seen that the absorbent pad can generally reduce the wearer's discomfort when the pulp basis weight in the selvage is 250 g/m ² or more and 310 g/m ² or less. In the absorbent pad 1 according to this embodiment, the ear portions 44 have pulp, and the basis weight of the pulp in the ear portions 44 is 250 g/m ² or more and 310 g/m ² or less. According to the absorbent pad 1 having such a configuration, it is possible to reduce discomfort in the lateral recumbent position when worn.

<Embodiment 2>
FIG. 5 is a plan view of the absorbent pad 1 according to Embodiment 2 as viewed from the skin facing side. The absorbent pad 1 according to this embodiment includes lower layer lightening grooves 22 formed through the lower layer absorbent body 17 in the thickness direction. The same reference numerals are given to the same constituent elements as those of the absorbent pad 1 according to the first embodiment shown in FIGS. 1 and 2, and the explanation thereof will be omitted. In the absorbent article according to this embodiment, the lower layer lightening grooves 22 are formed in the lower layer absorbent core 17 .

The lower layer lightening grooves 22 are formed through the lower layer absorbent body 17 in the thickness direction, overlap the upper layer lightening grooves 21 and extend in the longitudinal direction of the absorbent body 14 . The lower layer lightening groove 22 is formed substantially in the widthwise center of the lower layer absorbent body 17 . Similarly to the upper layer lightening groove 21, the lower layer lightening groove 22 is formed including a portion corresponding to the urethral meatus so that urine excreted by the wearer can easily flow in. As shown in FIG. 5, in a plan view, the lower layer lightening groove 22 has a rectangular shape with arc-shaped ends in the longitudinal direction. The center of the lower layer lightening groove 22 in the width direction substantially coincides with the center of the upper layer lightening groove 21 in the width direction. The front end of the lower layer lightening groove 22 is located in the middle of the front body region 3 , and the rear end of the lower layer lightening groove 22 is located in the front of the back body region 7 . . Further, the lower layer lightening groove 22 has a constant width. The width of the lower layer lightening groove 22 is narrower than the width of the upper layer lightening groove 21, and is, for example, 20 mm. Thus, the lower layer lightening grooves 22 are formed to have a narrower width than the upper layer lightening grooves 21 . Also, the length of the lower layer lightening groove 22 is, for example, 225 mm or more and 315 mm or less. The lower layer lightening groove 22 is shorter than the upper layer lightening groove 21 and is included in the upper layer lightening groove 21 when viewed in the longitudinal direction. Moreover, the absorbent pad 1 having the upper layer lightening grooves 21 and the lower layer lightening grooves 22 having the above sizes is suitable for an adult urine pad.

In the absorbent pad 1 according to the present embodiment, the upper layer lightening grooves 21 and the lower layer lightening grooves 22 overlap when viewed from the side facing the skin, and the upper layer lightening grooves 21 and the lower layer lightening grooves 22 absorb. A through-type lightening groove is formed through the body 14 in the thickness direction. In addition, the upper layer lightening groove 21 and the lower layer lightening groove 22 may be formed not in a rectangular shape but in a polygonal shape or an elliptical shape in plan view.

Liquid such as urine excreted by the wearer flows through the upper layer cutout grooves 21 and the lower layer cutout grooves 22 and is diffused throughout the absorbent body 14 . Thus, in the absorbent pad 1 according to the present embodiment, the upper layer lightening grooves 21 and the lower layer lightening grooves 22 allow the liquid to diffuse throughout the absorbent body 14 and the liquid to be absorbed by the absorbent body 14 .

Further, as shown in FIG. 5, the longitudinal directions of the upper absorbent core 15, the lower absorbent core 17, the upper absorbent groove 21, the lower absorbent groove 22, and the SAP layers 23L, 23R are aligned. The upper layer lightening groove 21, the lower layer lightening groove 22, and the SAP layers 23L and 23R are arranged substantially parallel to each other.

FIG. 6 is a cross-sectional view of the absorbent pad 1 shown in FIG. 5 taken along line BB. In FIG. 6, in order to make each component of the absorbent pad 1 easy to understand, a gap is provided between each component, but in reality, almost no gap is formed between each component. .

As shown in FIG. 6, the absorbent pad 1 according to the present embodiment comprises a top sheet 11, an upper layer sheet 31, a portion of the lower layer sheet 33, an upper layer absorbent body 15, and It has a structure in which the SAP layers 23L and 23R, the lower layer absorbent body 17, part of the lower layer sheet 33, and the back sheet 13 are laminated in this order. In addition, by joining the peripheral edge 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 absorbent body 15, the SAP layers 23L and 23R, and the lower layer absorbent body 17 are combined into the top sheet 11 and the back sheet. A sheet 13 surrounds and seals the periphery.

In the absorbent pad 1 according to the present embodiment, as in the absorbent pad 1 according to the first embodiment, the SAP layers 23L and 23R are arranged inside the standing lines 42 of the pair of three-dimensional gathers 40a. Side leakage of liquid can be suppressed.

Further, in the absorbent pad 1 according to the present embodiment, the SAP layers 23L and 23R of the absorbent pad 1 according to the present embodiment have a basis weight of 100 g/m ² or more and 200 g/m ^{2 or less, and the amount of SAP is 4.0 g/m 2 or more and 200 g/m 2} or less. .2g or more and 9.5g or less. According to the absorbent pad 1 having such a configuration, lateral leakage of liquid can be suppressed while reducing uncomfortable feeling when worn.

Further, in the absorbent pad 1 according to the above embodiment, the ear portions 44 have pulp, and the basis weight of the pulp in the ear portions 44 is 250 g/m ² or more and 310 g/m ² or less. According to the absorbent pad 1 having such a configuration, it is possible to reduce discomfort in the lateral recumbent position when worn.

Although the absorbent pad 1 is exemplified in the above embodiments and examples, the above configuration can also be applied to other forms of absorbent articles. Examples of absorbent articles to which the above configuration can be applied include 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 absorbent articles without gathers. and sexual goods.

1 Absorbent pad: 3 Front body region: 5 Inseam region: 7 Back body region: 11 Top sheet: 13 Back sheet: 14 Absorbent body: 15 Upper layer absorption Body: 17 Lower layer absorbent body: 21 Upper layer lightening groove: 22 Lower layer lightening groove: 23L SAP layer: 23R SAP layer: 30 Core wrap sheet: 31 Upper layer sheet: 33 Lower layer sheet: 37 area

Claims (4)

When worn, it has a front body region located on the abdomen side of the wearer, a crotch region located on the crotch, and a back body region located on the back side, and has a gourd shape in plan view, and is the narrowest of the gourd shape. An absorbent article having a region located within the crotch region,
a liquid-permeable top sheet arranged on the side facing the skin when worn;
a liquid-impermeable back sheet disposed on the opposite side of the skin-facing surface;
an absorbent body disposed between the top sheet and the back sheet;
a pair of three-dimensional gathers extending along the longitudinal direction of the absorbent body and connected to the top sheet;
with
one end of the three-dimensional gather is a fixed end that serves as a standing line, and the other end is a free end;
The absorbent body has an upper absorbent body arranged at least on the top sheet side and a lower absorbent body arranged on the back sheet side in the crotch region,
In a plan view, ear portions that bulge outward from the crotch region and are positioned outward from the standing line are formed in the back body region,
the ear portion is integral with the upper absorbent body in the crotch region;
an SAP layer disposed between the upper absorbent body and the lower absorbent body and containing a plurality of superabsorbent polymer particles;
a laminated structure of absorbent layers composed of the upper absorbent body, the SAP layer, and the lower absorbent body;
with
The SAP layer extends along the longitudinal direction of the absorbent body, and has an inner end located at a distance of 15 mm or more and 27.5 mm or less from the widthwise center of the absorbent body toward the widthwise end of the absorbent body. ,
The SAP layer has an outer end located at a distance of 60 mm or more and 72.5 mm or less from the center in the width direction of the absorbent body toward the end in the width direction of the absorbent body , and from the standing line of the pair of three-dimensional gathers. the outer edge of the SAP layer is disposed on the inner side of
The width of the SAP layer is 35 mm or more and 55 mm or less,
The total amount of liquid absorbed by the SAP layer is 180 ml or more and 600 ml or less,
The upper absorbent body comprises SAP and pulp,
In the upper absorbent body, the amount of SAP is 16 g or more and 26 g or less, and the amount of pulp is 27 g or more and 42 g or less,
In a plan view, the lower absorbent core does not overlap the ear portions,
The lower absorbent body has pulp,
In the lower absorbent body, the amount of pulp is 7 g or more and 28 g or less.
absorbent article. In the SAP layer, the SAP basis weight is 100 g/m ² or more and 200 g/m ² or less, and the SAP amount is 4.2 g or more and 9.5 g or less.
The absorbent article according to claim 1. the ears comprise pulp;
In the selvage, the basis weight of the pulp is 250 g/m ² or more and 310 g/m ² or less,
The absorbent article according to claim 1 or 2. In plan view, the lower absorbent body has a rectangular shape,
4. The absorbent article according to any one of claims 1-3.

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