Auxiliary sheet for absorbent articles

Abstract

The present invention provides an auxiliary sheet for absorbent articles that reduces slippage of absorbent articles, decreases the amount of viscous excretory fluid such as loose stools adhering to the skin, and prevents leakage of excretory fluid from behind. [Solution] The absorbent auxiliary sheet 10 has a pocket space P on the inner side in the width direction, and the absorbent auxiliary sheet 10 has a fitting part 1 having a length W1 that can be fitted in the width direction with respect to the length V1 between the outer upright base ends in the width direction in the pocket space of the three-dimensional gathered part, and a pair of positioning parts 2 that abut against the upright base end at the rear end in the longitudinal direction in the pocket space of the three-dimensional gathered part, and the ratio of the length of the fitting part along the longitudinal direction to the length in the longitudinal direction between the upright base end at the front end and the upright base end at the rear end of the three-dimensional gathered part is 0.10 or more and 0.50 or less.

Description

Technical Field

[0001] The present invention relates to an auxiliary sheet for absorbent articles.

Background Art

[0002] Conventionally, auxiliary sheets and the like used in combination with absorbent articles have been known. For example, Patent Document 1 describes an auxiliary sheet that is removably disposed on the skin side of an absorbent article. The auxiliary sheet includes a fiber aggregate composed of bundles of long fibers. In the fiber aggregate, the fibers are more firmly fixed to each other on the skin contact surface than on the non-skin contact surface side, the fuzzing of the fibers on the skin contact surface is suppressed, and the texture is excellent. Further, since the uneven distribution of long fibers is suppressed, it is said that the absorbency and permeability can be enhanced in a wide range while diffusing moisture in the orientation direction of the long fibers. Patent Document 2 describes an auxiliary absorber used by attaching it to the skin side of an absorbent article. The auxiliary absorber has an adhesive portion on the outer covering sheet on the outer surface side of the main body portion including the absorber, and is attached to a desired position of the absorbent article by the adhesive portion. A release sheet extends in the longitudinal direction on the adhesive portion and extends outside the end of the main body portion. Thereby, it is said that it becomes easy to appropriately attach the auxiliary absorber to the absorbent article. Patent Document 3 describes an auxiliary absorbent article used in combination with disposable diapers and underwear. The auxiliary absorbent article has a liquid-permeable front sheet and a liquid-permeable back sheet on both sides of the absorber. On the back sheet side, a pair of liquid-impermeable or water-repellent guiding sheet portions having free ends at the center in the width direction are arranged, and an adhesive portion is provided in the vicinity of the free ends. The adhesive portion fixes the auxiliary absorbent article to the skin surface of a disposable diaper or the like used in combination, and thereby it is said that the occurrence of leakage can be prevented.

Prior Art Documents

Patent Documents

[0003] [[ID=,[]29]]

Patent Document 1

[0004] In conventional technology, auxiliary sheets used in combination with absorbent articles are made to a certain width along the longitudinal direction of the absorbent article so as to cover the surface sheet of the absorbent article. When the auxiliary sheet is placed on the skin-contacting side of the absorbent article and attached along the front-to-back direction from the wearer's crotch, the auxiliary sheet becomes narrower at the position corresponding to the wearer's crotch. As a result, the auxiliary sheet may lift up from the absorbent article and shift, and there is room for improvement from the viewpoint of the absorbency of bodily fluids discharged by the wearer. In particular, there is room for improvement in the auxiliary sheet in terms of preventing such shifting, firmly capturing viscous excretions such as loose stools and menstrual blood, separating them from the skin and allowing them to pass through to the absorbent article, thereby preventing leakage from behind.

[0005] In view of the above, the present invention relates to an auxiliary sheet for absorbent articles that can suppress shifting of the absorbent article, reduce the amount of viscous excretory fluid such as loose stool adhering to the skin, and prevent leakage of the excretory fluid from behind. [Means for solving the problem]

[0006] The present invention relates to an absorbent article having a longitudinal direction corresponding to the direction connecting the front, crotch, and back of the wearer, and a width direction perpendicular to the longitudinal direction, and having a pair of three-dimensional gathered portions on both side edges along the longitudinal direction, and is used by being placed on the skin-contacting side of the absorbent article, wherein each of the three-dimensional gathered portions has an upright base end at the front and rear ends in the longitudinal direction and an upright base end on the outer side in the width direction, and has a pocket space on the inner side in the width direction, and the absorbent article auxiliary sheet is placed on the front of the pair of three-dimensional gathered portions The present invention provides an auxiliary sheet for absorbent articles, comprising: a fitting portion having a length in the width direction that can be fitted in relation to the length between the outer upright base ends in the width direction within the pocket space; and a pair of positioning portions that abut against the rear upright base end in the longitudinal direction within the pocket space of the pair of three-dimensional gathered portions, wherein the ratio (S1 / S2) of the length (S1) of the fitting portion along the longitudinal direction to the length (S2) in the longitudinal direction between the front upright base end and the rear upright base end of the three-dimensional gathered portion is 0.10 or more and 0.50 or less.

[0007] Furthermore, the present invention relates to a method for using an absorbent article auxiliary sheet, which is used by placing it on the skin-contacting surface of an absorbent article, having a longitudinal direction corresponding to the direction connecting the front, crotch, and back of the wearer and a width direction perpendicular to the longitudinal direction, and having a pair of three-dimensional gathered portions on both side edges along the longitudinal direction, wherein each three-dimensional gathered portion has an upright base end at the front and rear ends in the longitudinal direction and an upright base end on the outer side in the width direction, and has a pocket space on the inner side in the width direction, and the absorbent article auxiliary sheet has a fitting portion having a length that can be fitted in the width direction to the length between the upright base ends on the outer side in the width direction in the pocket space of the pair of three-dimensional gathered portions, and in the pocket space of the pair of three-dimensional gathered portions, The present invention provides a method for using an absorbent article auxiliary sheet, comprising the steps of: fitting the absorbent article auxiliary sheet in the width direction between the outward-facing upright base ends of the pair of three-dimensional gathered portions of the absorbent article; and positioning the absorbent article auxiliary sheet by abutting the upright base ends of the rear end of the absorbent article auxiliary sheet against the upright base end of the rear end of the absorbent article auxiliary sheet, either in this order or simultaneously. [Effects of the Invention]

[0008] The absorbent auxiliary sheet according to the present invention can suppress shifting of the absorbent article, reduce the amount of viscous excretory fluid such as loose stool adhering to the skin, and prevent leakage of the excretory fluid from behind. Furthermore, the method of using the absorbent auxiliary sheet according to the present invention effectively suppresses the shifting of the absorbent auxiliary sheet relative to the absorbent article, thereby reducing the amount of viscous excretory fluid such as loose stool adhering to the skin and preventing leakage of the excretory fluid from behind. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a schematic plan view showing one embodiment of the absorbent article auxiliary sheet of the present invention and an absorbent article to which the absorbent article auxiliary sheet of the present invention is applied, as seen from the skin-contacting surface. [Figure 2] Figure 2 is a schematic plan view showing the state after the absorbent auxiliary sheet shown in Figure 1 has been fitted and positioned on the skin-contacting side of the absorbent article. [Figure 3] Figure 3 is a schematic diagram illustrating one scene of the process of fitting the absorbent auxiliary sheet to the skin-contacting side of the absorbent article, as shown in Figure 1. [Figure 4] Figure 4 is a schematic diagram illustrating one scene of the process of positioning the auxiliary sheet for absorbent articles on the skin-contacting side of the absorbent article, as shown in Figure 1. [Figure 5] Figures 5(A) and (B) are schematic plan and perspective views of the absorbent auxiliary sheet shown in Figure 1. Figures 5(C) and (D) are schematic plan and perspective views of the absorbent auxiliary sheet shown in Figure 1 having an uneven shape in the thickness direction. [Figure 6] Figure 6(A) is a schematic plan view showing another example of the absorbent auxiliary sheet for absorbent articles of the present invention. Figure 6(B) is a schematic plan view showing a configuration in which the absorbent auxiliary sheet for absorbent articles shown in Figure 6(A) has an uneven shape in the thickness direction. [Figure 7] Figure 7 is a schematic diagram illustrating one scene of the process of positioning the auxiliary sheet for absorbent articles on the skin-contacting side of the absorbent article, as shown in Figure 6(A) of the method of using the auxiliary sheet for absorbent articles. [Figure 8] Figure 8(A) is a schematic plan view showing yet another example of the absorbent auxiliary sheet for absorbent articles of the present invention. Figure 8(B) is a schematic plan view showing the absorbent auxiliary sheet for absorbent articles shown in Figure 8(A) having an uneven shape in the thickness direction. [Figure 9] Figure 9 is a schematic plan view showing the state after the absorbent auxiliary sheet shown in Figure 8(A) has been fitted and positioned on the skin-contacting side of the absorbent article. [Figure 10] FIG. 10(A) is a plan view schematically showing yet another example of the auxiliary sheet for absorbent articles of the present invention. FIG. 10(B) is a plan view schematically showing a form having an uneven shape in the thickness direction in the auxiliary sheet for absorbent articles shown in FIG. 10(A). [Figure 11] FIG. 11(A) is a plan view schematically showing yet another example of the auxiliary sheet for absorbent articles of the present invention. FIG. 11(B) is a plan view schematically showing a form having an uneven shape in the thickness direction in the auxiliary sheet for absorbent articles shown in FIG. 11(A). [Figure 12] FIG. 12(A) is a plan view schematically showing yet another example of the auxiliary sheet for absorbent articles of the present invention. FIG. 12(B) is a plan view schematically showing a form having an uneven shape in the thickness direction in the auxiliary sheet for absorbent articles shown in FIG. 12(A). [Figure 13] FIG. 13 is a plan view schematically showing a state after fitting and positioning the auxiliary sheet for absorbent articles shown in FIG. 11(A) on the skin contact surface side of the absorbent article.

BEST MODE FOR CARRYING OUT THE INVENTION

[0010] Hereinafter, preferred embodiments of the absorbent article auxiliary sheet (hereinafter, also simply referred to as an auxiliary sheet) of the present invention will be described with reference to the drawings. In the present invention, unless otherwise specified, the side that contacts the human body is referred to as the skin-facing surface side, and the opposite side is referred to as the non-skin-facing surface side. These are also used as terms indicating the relative positional relationship in the member configuration of the absorbent article with respect to a member that does not have a surface that contacts the human body. Also, the direction located on the front side of the human body during wearing is referred to as the front, and the direction located on the rear side is referred to as the rear. The normal direction of the front or back surface of the absorbent article is referred to as the thickness direction.

[0011] The auxiliary sheet of the present invention is disposed and used on the skin contact surface side of the absorbent article. The absorbent article has a longitudinal direction corresponding to the direction connecting the front side, crotch, and rear side of the wearer and a width direction orthogonal to the longitudinal direction, and a pair of three-dimensional gather portions are provided on both side edges along the longitudinal direction. The absorbent articles may include various items that have the function of absorbing and retaining the wearer's excretions and other bodily fluids, and that are equipped with the aforementioned three-dimensional gathers. Examples include diapers, absorbent pads, sanitary napkins, urine pads, panty liners, and incontinence pads. The diapers include various forms such as tape-type and pant-type, and include adult and infant sizes. The wearer's excretions and other bodily fluids absorbed by the absorbent articles include urine, as well as loose stools, menstrual blood, vaginal discharge, etc. In the following description of the embodiments, a urine pad is given as an example of an absorbent article to which the auxiliary sheet of the present invention is applied; however, as stated above, the absorbent article to which it is applied is not limited to this.

[0012] Figure 1 shows an auxiliary sheet 10 (10A) comprising a fitting portion 1 and a urine pad 100 to which the auxiliary sheet 10A is applied, as one embodiment of the auxiliary sheet and absorbent article of the present invention. First, let me explain the basic components of the 100 urine absorption pad. The urine pad 100 has a longitudinal direction Y that corresponds to the direction connecting the front (abdominal), crotch, and back (buttocks) sides of the wearer in a plan view, and a width direction X that is perpendicular to the longitudinal direction Y. The width direction X corresponds to the direction connecting the left and right legs in the wearer's crotch. In the longitudinal direction Y, the urine pad 100 is divided into an abdominal portion F located on the front side of the wearer, a crotch portion C located in the wearer's crotch, and a dorsal portion R located on the back side of the wearer. The urine absorption pad 100 is constructed by laminating a surface sheet 101 on the skin-contacting side, a back sheet 102 on the non-skin-contacting side, and an absorbent material 103 interposed between the two sheets. The surface sheet 101 and the back sheet 102 are large enough to cover both sides of the absorbent material 103 and extend outward from it. On the skin-contacting side of the surface sheet 101, a pair of side sheets 104, 104 are arranged along both side edges in the longitudinal direction Y, and are joined to the surface sheet 101 and the back sheet 102 at these positions. This joining can be carried out by various means commonly used in absorbent articles, such as hot-melt adhesives. Note that in Figure 1, the joining area of ​​the side sheet 104 is colored to show the joining area for understanding, but this does not indicate that such coloring is present in an actual urine absorption pad (the same applies to other drawings).

[0013] Each side sheet 104 has a free end on its inner side that is not joined to the surface sheet 101, etc., in the non-joined area other than the aforementioned joining area, and an elastic member 105 is arranged at this free end so as to be expandable and contractible along the longitudinal direction Y. More specifically, the front and rear ends of the elastic member 105 are joined and fixed in an extended state in the joining area at the front and rear ends in the longitudinal direction Y, and the elastic member 105 is expandable and contractible between them. By expanding and contracting the elastic member 105, the free end of the side sheet 104 is made expandable and contractible, forming a three-dimensional gathered portion 106. As a result, the urine pad 100 has a pair of three-dimensional gathers 106, 106 on both side edges along the longitudinal direction Y in a plan view. The three-dimensional gathers 106 stand up against the wearer's skin surface due to the contraction of the elastic member 105 when the urine pad 100 is attached, and have the function of filling the gap between the skin surface and the urine pad 100 to prevent leakage of excretory fluid from the sides. The aforementioned "inner side" refers to the central side in the width direction X of the urine absorption pad 100. The side located outside the central side in the width direction X is called the "outer side."

[0014] As described above, the three-dimensional gathered portion 106 is formed in the non-jointed area of ​​the side sheet 104, excluding the jointed area. The three-dimensional gathered portion 106 has upright base ends 107Y, 107Y at the front and rear ends in the longitudinal direction Y, and upright base ends 107X, 107X on the outward side in the width direction X, at the boundary between the jointed area and the non-jointed area. In this configuration, the three-dimensional gathered portion 106 has a pocket space P on the inward side in the width direction X, surrounded by the upright base ends 107Y at the front and rear ends and the upright base end 107X on the outward side in the width direction X. The three-dimensional gathered portion 107 is made to stand up in the non-jointed area by the contraction of the elastic member 105, starting from the upright base ends 107Y at the front and rear ends and the upright base end 107X on the outward side in the width direction X, and the pocket space P expands accordingly.

[0015] Furthermore, the urine pad 100 has two through holes 108, 108 in the absorbent material 103 at the crotch area C. This allows the crotch area C of the urine pad 100 to contract and deform in the width direction X in response to the compression between the wearer's thighs when worn. In addition to the basic configuration described above, the urine absorption pad 110 may also include other components.

[0016] Next, the auxiliary sheet 10A will be described. The longitudinal direction Y and width direction X shown in the following description refer to the longitudinal direction Y and width direction X of the urine absorption pad 100, and are directions that are specified when the auxiliary sheet 10A is fitted and positioned on the urine absorption pad 100. As described above, the auxiliary sheet 10A is composed of a fitting portion 1. In a plan view, the fitting portion 1 has a length (W1) that allows it to fit in the width direction X with respect to the length (V1) between the outward-facing upright base ends 107X, 107X of the pair of three-dimensional gathered portions 106, 106 of the urine pad 100, in the pocket spaces P, P. That is, the fitting portion 1 has a length (W1) along the width direction X that allows it to fit into the pocket spaces P, P on both the left and right sides and be positioned and fixed in place by the contraction force of the three-dimensional gathered portions 106, 106. In addition, the fitting portion 1 has a pair of positioning portions 2, 2 that abut against the upright base end portion 107Y at the rear end in the longitudinal direction Y in the pocket spaces P, P of the pair of three-dimensional gathered portions 106, 106. The positioning portions 2 are the rear end edges of the fitting portion 1 and correspond to the length in the width direction X of the upright base end portion 107Y at the rear end in the longitudinal direction Y in each pocket space P. That is, the positioning portions 2 can be identified as the portions that abut against the upright base end portion 107Y at the rear end in the longitudinal direction Y when the fitting portion 1 is fitted into the pocket space P. Furthermore, the ratio (S1 / S2) of the length (S1) of the fitting portion 1 along the longitudinal direction Y to the length (S2) of the three-dimensional gathered portion 106 between the upright base end 107Y at the front end and the upright base end 107Y at the rear end is 0.10 or more and 0.50 or less. This means that the fitting portion 1 is sized to fit behind the center line M of the length (S2) of the length Y of the urine pad 100, and is mainly sized to fit in the dorsal portion R.

[0017] With these configurations, the auxiliary sheet 10A is used by fitting the fitting portion 1 into the left and right pocket spaces P, P on the back side R of the urine absorption pad 100, and by abutting against the upright base end portion 107Y at the rear end in the longitudinal direction Y, as shown in Figure 2. Furthermore, the operation of fitting the pad into the pocket space P is not limited to the dorsal side R of the urine absorption pad 100, but can be performed in any region within the pocket space P extending in the longitudinal direction Y where fitting is possible. Depending on the fitting position, the distance the auxiliary sheet 10A travels to abut against the upright base end 107Y at the rear end of the longitudinal direction Y and fix it in place will vary. Therefore, considering the convenience of this series of operations, it is preferable that the fitting position includes at least the dorsal side R.

[0018] Specifically, the method of using this auxiliary sheet 10A involves performing the following two steps in this order or simultaneously. In other words, as shown in Figure 3, in the pocket spaces P, P of the pair of three-dimensional gathered portions 106, 106 of the urine pad 100, the auxiliary sheet for absorbent articles is fitted in the width direction between the upright base ends 107X, 107X on the outer side in the width direction X. Furthermore, as shown by arrow F in Figure 4, the positioning portions 2, 2 of the fitted auxiliary sheet 10A are abutted against the upright base ends 107Y, 107Y at the rear end in the longitudinal direction Y, thereby positioning the auxiliary sheet 10A.

[0019] The auxiliary sheet 10A is used in this manner, and as shown in Figure 2, it is possible to reliably achieve proper positioning of the auxiliary sheet 10A on the dorsal side R of the urine pad 100. Moreover, the contractile force of the three-dimensional gather portion 106 fixes the position of the auxiliary sheet 10A, allowing for stable use. In other words, it is possible to suppress the displacement of the auxiliary sheet 10A relative to the absorbent material. As a result, it becomes possible to form a surface layer of the necessary thickness in the urine pad 100 in the area where soft stool absorption is required. Specifically, on the dorsal side R, the laminated structure of the surface sheet 101 and the auxiliary sheet 10A is fixed in place using the action of the three-dimensional gather portion 106, resulting in a surface layer with suppressed displacement. This makes the surface layer on the dorsal side R thicker, conforming to the curvature of the wearer's buttocks, thereby increasing the absorption capacity of viscous excretions such as soft stool that are likely to be received on the dorsal side R, reducing the amount of skin contact, and preventing leakage of the excretion from the back. Furthermore, the suppression of displacement of the auxiliary sheet 10A is also significantly observed in deformation associated with the attachment of the urine pad 100. Specifically, the urine pad 100 is attached to the wearer's crotch by narrowing its width by folding it in the width direction X at the crotch area 10. In the actual process of attachment, the auxiliary sheet 10A is not affected by the narrowing of the width of the crotch area C because the fitting portion 1 does not extend to the crotch area C. As a result, displacement of the auxiliary sheet 10A is less likely to occur during and after attachment, allowing the auxiliary sheet 10A to fully perform its function of absorbing soft stools. Furthermore, as shown in Figure 2, the auxiliary sheet 10A does not extend to the crotch area C and the abdominal area F of the urine absorption pad 100, allowing for a thinner thickness in those areas and reducing discomfort during wear. In other words, it enhances the mobility of the wearer's front area from the crotch to the lower abdomen, making various movements such as leg movements easier and improving the wearing comfort. In addition, the appearance tends to be relatively neat, reducing resistance from the wearer during use. In addition, by making the surface layer of the urine pad 100 different in the dorsal part R and the ventral part F, it becomes possible to make the liquid absorption function of each region different. For example, the surface sheet 101 is made to have the function of diffusing the excretory fluid and quickly absorbing it in the thickness direction over a wide area, making it suitable for absorbing relatively low-viscosity excretory fluids such as urine in the ventral part F. On the other hand, the auxiliary sheet 10A is made to have the function of keeping the excretory fluid in one place without diffusing it in the planar direction and allowing it to permeate in the thickness direction, and by combining this auxiliary sheet 10A with the surface sheet 101 in the dorsal part R, it becomes suitable for absorbing high-viscosity excretory fluids such as loose stools. In other words, in the dorsal part R, the liquid component of high-viscosity excretory fluid can be quickly absorbed in a narrow area without diffusion and transferred from the surface sheet 101 to the absorbent body 103. By using the auxiliary sheet 10A in this way, it becomes possible to make the liquid absorption function of the surface layer of the ventral part F and the dorsal part R of the urine pad 100 different according to the properties of the excreted fluid, thereby improving the liquid absorption and leakage prevention properties of the urine pad 100. In this embodiment, the function of placing the auxiliary sheet 10A on the dorsal side R was described as a function for absorbing loose stools. However, in the present invention, it can also be used to absorb not only loose stools but also highly viscous excretory fluids, such as menstrual blood.

[0020] Based on this usage configuration, the length (V1) between the upright base ends 107X, 107X on the outer side in the width direction X, as described above, represents the length of the urine pad 100 at the dorsal side R. The ratio (W1 / V1) of the length (W1) of the fitting portion 1 along the width direction X to the length (V1) between the upright base ends 107X, 107X on the outer side of the width direction X is preferably 0.6 or more, more preferably 0.7 or more, and even more preferably 0.8 or more, from the viewpoint of improving the positioning and fixing. The upper limit of the aforementioned ratio (W1 / V1) is 1 or less, from the standpoint of enabling fitting.

[0021] The ratio (S1 / S2) of the length (S1) of the fitting portion 1 along the longitudinal direction Y to the length (S2) of the longitudinal direction Y between the front and rear standing base ends 107Y of the three-dimensional gathered portion 106 is preferably 0.50 or less, more preferably 0.4 or less, and even more preferably 0.3 or less, from the viewpoint of further enhancing the mobility of the front area from the wearer's crotch to the lower abdomen and making movements such as the movement of both legs easier. The ratio (S1 / S2) is preferably 0.10 or higher, more preferably 0.13 or higher, and even more preferably 0.15 or higher, from the viewpoint of further improving the stability of placement on the absorbent article.

[0022] The length (S1) of the fitting portion 1 along the longitudinal direction Y is preferably 4 cm or more, more preferably 7 cm or more, and even more preferably 10 cm or more, from the viewpoint of achieving more reproducible proper positioning at the dorsal side portion R. The length (S1) of the fitting portion 1 along the longitudinal direction Y is preferably 20 cm or less, more preferably 15 cm or less, and even more preferably 13 cm or less, from the viewpoint of increasing the mobility of the front area from the wearer's crotch to the lower abdomen and making movements such as the movement of both legs easier.

[0023] From the viewpoint of improving the operability of the two steps described above in the method of using the auxiliary sheet 10A and further improving the ability to prevent misalignment during installation, it is preferable that the fitting portion 1 of the auxiliary sheet 10A is thick and has high rigidity. From this perspective, the thickness of the fitting portion 1 is preferably 2 mm or more, more preferably 5 mm or more, and even more preferably 8 mm or more. The thickness of the fitting portion 1 is preferably 25 mm or less, more preferably 20 mm or less, and even more preferably 15 mm or less, from the viewpoint of further improving the stability of its placement relative to the absorbent article. Similarly, the rigidity of the fitting portion 1 is preferably 0.25 or higher, more preferably 0.30 or higher, and even more preferably 0.35 or higher. From the viewpoint of maintaining a soft texture, the rigidity of the fitting portion 1 is preferably 2.50 or less, more preferably 2.00 or less, and even more preferably 1.50 or less.

[0024] (Method for measuring stiffness) To measure the rigidity of the auxiliary sheet, a KES large bending tester (KES FB-2-L, manufactured by Kato Tech Co., Ltd.) was used to test a nonwoven fabric sample cut into a rectangular shape with a length of 20 cm and a width of 50 mm. The full-scale bending moment was measured at 400 gf·cm and the curvature increase rate at 0.5 cm. -1 / SEC, with a clamping interval of 40 mm, perform a bending hardness characteristic evaluation and read the displayed B value. For the measurement, three nonwoven fabric samples are each measured, and the average value is taken as the B value of the auxiliary sheet. The B value mentioned above can measure the stiffness of a sheet-like material when it is bent. A larger B value indicates higher stiffness and easier retention of the material's shape.

[0025] The fitting portion 1 is preferably made of a high material weight, in order to improve the aforementioned operability, suppress the diffusion of highly viscous excretory fluid in the planar direction and further enhance the absorbency of liquid components, and to provide cushioning to the wearer's buttocks on the dorsal side R of the urine pad 100 to further enhance the wearing comfort. The basis weight of the interlocking section 1 is 35 g / m 2 The above is preferable, 40g / m 2 The above is more preferable: 50 g / m 2 The above is even more preferable. The fabric weight of the interlocking section 1 is 150g / m², chosen to maintain a soft feel against the wearer's skin. 2 The following is preferable: 130 g / m 2 The following is more preferable: 110 g / m²2 The following is even more preferable.

[0026] Such a configuration of thickness, rigidity, and basis weight is possible because the auxiliary sheet 10A does not extend to the ventral side F, thus not hindering the aforementioned fit and feel against the skin. In this respect, auxiliary sheets and auxiliary absorbents in conventional technology, which are distributed along the entire longitudinal direction of absorbent articles, require flexibility because the entire structure needs to curve and conform to the wearer's crotch in the front-to-back direction, and thus maintain the overall fit and feel against the skin. For this reason, the above configuration is difficult to achieve or tends to be avoided as much as possible in conventional technology.

[0027] From the viewpoint of further improving the stability of the placement of the auxiliary sheet 10A on the urine pad 100, when the urine pad 100 is stretched out in a flat shape and the fitting portion 1 is fitted into the pocket spaces P, P, it is preferable that the length by which the fitting portion 1 overlaps with each of the three-dimensional gathered portions 106, 106 in the width direction X is 1 cm or more, more preferably 1.5 cm or more, and even more preferably 2.0 cm or more. From the viewpoint of further improving operability, the overlapping length in the width direction is preferably 4.5 cm or less, more preferably 4.0 cm or less, and even more preferably 3.5 cm or less. The "state of being stretched in the planar direction" refers to the state in which the elastic member 105 or other expandable member is stretched to prevent the urine pad 100 from curling up and to spread it out so that the skin-contacting surface is flat. The "overlapping length in the width direction" refers to the length of each of the left and right three-dimensional gathered portions 106, 106.

[0028] The fitting portion 1 of the auxiliary sheet 10A can be formed from various materials capable of achieving the above functions, such as nonwoven fabric or polyurethane foam. Nonwoven fabric is preferred from the viewpoint of suppressing the diffusion of highly viscous excretory fluid in the planar direction and further enhancing the absorbency of liquid components, from the viewpoint of making the surface feel softer, from the viewpoint of increasing the basis weight and making it bulkier, from the viewpoint of more favorably controlling the balance between rigidity and cushioning, and from the viewpoint of forming the uneven shape described later in a regular arrangement, and among nonwoven fabrics, air-through nonwoven fabric is more preferred. Furthermore, the auxiliary sheet 10A is made of a material that has liquid permeability to the absorbent as a component of the surface layer, and from the viewpoint of reducing the amount of excretory fluid adhering to the skin, it is preferable that it does not contain superabsorbent polymer material (so-called SAP, a surface-crosslinked liquid absorbent material).

[0029] The auxiliary sheet 10 may be an auxiliary sheet 10A with a smooth and flat surface, as shown in Figures 5(A) and (B), or it may be an auxiliary sheet 10B having an uneven shape in the thickness direction, as shown in Figures 5(C) and (D). The auxiliary sheet 10B having an uneven shape in the thickness direction is preferable because it can further suppress the diffusion of the highly viscous excretory fluid in the planar direction at the dorsal side R and enhance the absorbency of liquid components. In particular, even if the auxiliary sheet 10B itself does not possess absorbency, the uneven shape structurally gives the auxiliary sheet 10A absorbency (the ability to draw in and retain liquid components inside). In the configuration shown in Figures 5(C) and (D), the recesses 8 are arranged regularly in the planar direction, and each recess 8 has a bottom 81. The recesses 8 may have a bottom 81, or they may be through holes without a bottom 81. From the viewpoint of further reducing the amount of excretory fluid adhering to the skin, it is preferable that the recesses 8 have a bottom 81. The planar shapes of the fitting portion 1 and the positioning portion 2 are not limited to those shown in Figures 5(A) to (D), but can be various shapes that can produce the aforementioned functions.

[0030] The auxiliary sheet of the present invention is not limited to the auxiliary sheet 10A, which consists only of a fitting portion 1 and a positioning portion 2 as shown in Figure 1, but may include various forms as long as they do not hinder the aforementioned functions. The auxiliary sheet of the present invention may be an auxiliary sheet 10C having a position adjustment part 3 between a pair of positioning parts 2, 2, as shown in Figure 6(A). In a plan view, the position adjustment part 3 has a shape that protrudes further to the rear in the longitudinal direction Y than the positioning parts 2. This makes the aforementioned positioning process smoother and more accurate. For example, as shown in Figure 7, in the pocket space P, P, with the fitting part 1 of the auxiliary sheet 10C fitted in the width direction X between the upright base ends 107X, 107X on the outward side in the width direction X, simply by grasping the position adjustment part 3 and pulling it toward the rear end (in the direction of arrow F in Figure 7), the positioning parts 2, 2 can be brought into contact with the upright base ends 107Y, 107Y at the rear end in the longitudinal direction Y. By operating the position adjustment part 3 in this way, the entire auxiliary sheet 10C becomes easier to move toward the rear end, making the aforementioned positioning process smoother and more accurate.

[0031] The auxiliary sheet 10C shown in Figure 6(A) may have an uneven shape in the thickness direction. For example, as shown in Figure 6(B), the auxiliary sheet 10D may have recesses 8 arranged regularly in the planar direction. Having an uneven shape as shown in the auxiliary sheet 10D is preferable because, as mentioned above, it can further suppress the diffusion of highly viscous excretory fluid in the planar direction at the dorsal side R and improve the absorbency of liquid components. Furthermore, the planar shape of the position adjustment unit 3 is not limited to those shown in Figures 6(A) and (B), but can be various shapes that can produce the aforementioned effects.

[0032] The ratio (W2 / V1) of the length (W2) of the position adjustment section 3 along the width direction X to the length (V1) between the upright base ends 107X, 107X on the outer side of the width direction X is preferably 0.40 or more, more preferably 0.45 or more, and even more preferably 0.50 or more, from the viewpoint of improving positioning operability. The ratio (W2 / V1) is preferably 0.75 or less, more preferably 0.70 or less, and even more preferably 0.65 or less, from the viewpoint of further suppressing displacement from the absorbent article. The length (S3) of the position adjustment section 3 along the longitudinal direction Y is preferably 3.0 cm or more, more preferably 5.0 cm or more, and even more preferably 7.0 cm or more, from the viewpoint of improving positioning operability. The length (S3) of the position adjustment section 3 along the longitudinal direction Y is preferably 12 cm or less, more preferably 11 cm or less, and even more preferably 10 cm or less, from the viewpoint of further suppressing displacement from the absorbent article.

[0033] Another example of the auxiliary sheet of the present invention is the auxiliary sheet 10E shown in Figure 8(A). The auxiliary sheet 10E has a crotch auxiliary portion 5 located in front of the fitting portion 1 in the longitudinal direction Y. The length of the crotch auxiliary portion 5 along the width direction X (W3) is shorter than the length of the fitting portion 1 along the width direction X (W1) (Figure 9). In the auxiliary sheet 10E, the crotch auxiliary portion 5 is a portion that extends and is arranged in the crotch area C of the urine pad 100, as shown in Figure 9. This crotch auxiliary portion 5 provides the crotch area C with both the ability to prevent the diffusion of highly viscous excretory fluids such as soft stool and the ability to absorb liquid. As a result, the crotch auxiliary portion 5 prevents the soft stool from spreading to the ventral area F and acts to absorb the liquid in the area from the crotch area C to the dorsal area R. Furthermore, since the length (W3) of the crotch support portion 5 along the width direction X is shorter than the length (W1) of the fitting portion 1 along the width direction X, the crotch support portion 5 is less likely to protrude from the urine pad 100, such as lifting up, during the attachment operation of the urine pad 100 in the crotch area C. As a result, even if the support sheet 10E includes the crotch support portion 5, the aforementioned positional misalignment is less likely to occur.

[0034] From this perspective, the ratio (W3 / V1) of the length (W3) of the crotch support portion 5 along the width direction X to the length (V1) between the upright base ends 107X, 107X on the outer side of the width direction X is preferably 0.27 or more, more preferably 0.30 or more, and even more preferably 0.33 or more. The ratio (W3 / V1) is preferably 0.65 or less, more preferably 0.60 or less, and even more preferably 0.55 or less, from the viewpoint of further reducing slippage in the wearer's crotch area and discomfort during wear. From a similar viewpoint, the length (W2) of the crotch support portion 5 along the width direction X is preferably 100 mm or less, more preferably 80 mm or less, and even more preferably 60 mm or less. The length (W2) of the crotch support portion 5 along the width direction X is preferably 15 mm or more, more preferably 20 mm or more, and even more preferably 25 mm or more, from the viewpoint of further improving the absorption performance of the crotch area.

[0035] The auxiliary sheet 10E shown in Figure 8(A) preferably has a connecting portion 4 between the fitting portion 1 and the crotch auxiliary portion 5 along the longitudinal direction Y, and the length of the connecting portion 4 along the width direction X gradually decreases from the fitting portion 1 to the crotch auxiliary portion 5. The presence of the connecting portion 4 enhances the positional stability of the auxiliary sheet 10E in the arrangement shown in Figure 9, from the portion of the dorsal side R of the urine absorption pad 100 near the crotch area C to the crotch area C, thereby improving the overall resistance to displacement of the auxiliary sheet 10E.

[0036] In the auxiliary sheet 10E, the length (S4) of the connecting portion 4 along the longitudinal direction Y is preferably 3.0 cm or more, more preferably 4.0 cm or more, and even more preferably 5.0 cm or more, from the viewpoint of further improving the ability to prevent misalignment of the entire auxiliary sheet 10E. The length (S4) of the connecting portion 4 along the longitudinal direction Y is preferably 10.0 cm or less, more preferably 9.0 cm or less, and even more preferably 8.0 cm or less, from the viewpoint of maintaining the rigidity of the fitting portion 1.

[0037] In the auxiliary sheet 10E, the length (S5) of the crotch auxiliary portion 5 along the longitudinal direction Y is preferably 0.15 cm or more, more preferably 0.20 cm or more, and even more preferably 0.25 cm or more, from the viewpoint of further improving the absorption performance of the crotch area. The length (S5) of the crotch support portion 5 along the longitudinal direction Y is preferably 7.0 cm or less, more preferably 6.0 cm or less, and even more preferably 5.0 cm or less, from the viewpoint of improving the ability to prevent the entire support sheet 10E from shifting position. In the auxiliary seat 10E, the ratio (S5 / S4) of the length of the crotch auxiliary portion 5 along the longitudinal direction Y (S5) to the length of the connecting portion 4 along the longitudinal direction Y (S4) is preferably 1.2 or less, more preferably 1.0 or less, and even more preferably 0.8 or less, from the viewpoint of further improving the ability of the crotch auxiliary portion 5 to prevent misalignment. The ratio (S5 / S4) is preferably 0.4 or higher, more preferably 0.5 or higher, and even more preferably 0.6 or higher, from the viewpoint of further improving the absorption performance in the crotch area.

[0038] In the auxiliary sheet 10E, the sum of the lengths of the connecting portion 4 and the crotch auxiliary portion 5 along the longitudinal direction Y (S6 = S4 + S5) is preferably 7.0 cm or more, more preferably 8.0 cm or more, and even more preferably 9.0 cm or more, from the viewpoint of further improving the overall positional slippage prevention and crotch absorption of the auxiliary sheet 10E. The sum of the lengths of the connecting portion 4 and the crotch support portion 5 along the longitudinal direction Y (S6 = S4 + S5) is preferably 15 cm or less, more preferably 14 cm or less, and even more preferably 13 cm or less, from the viewpoint of further increasing the rigidity of the fitting portion 1. In the auxiliary sheet 10E, the ratio (S6 / S1) of the sum of the lengths of the connecting portion 4 and the crotch auxiliary portion 5 along the longitudinal direction Y (S6 = S4 + S5) to the length of the fitting portion 1 along the longitudinal direction Y (S1) is preferably 1.2 or less, more preferably 1.0 or less, and even more preferably 0.8 or less, from the viewpoint of further improving the ability to prevent misalignment of the connecting portion 4 and the crotch auxiliary portion 5. From the viewpoint of further improving the absorption performance of the auxiliary sheet 10, the ratio (S6 / S1) is preferably 0.4 or higher, more preferably 0.5 or higher, and even more preferably 0.6 or higher.

[0039] The auxiliary sheet 10E shown in Figure 8(A) may have an uneven shape in the thickness direction. For example, as shown in Figure 8(B), the auxiliary sheet 10F may have recesses 8 arranged regularly in the planar direction. Having an uneven shape as shown in the auxiliary sheet 10F is preferable because, as described above, it can further suppress the diffusion of highly viscous excretory fluid in the planar direction in the dorsal side R and groin area C and improve the absorbency of liquid components. Furthermore, the planar shapes of the connecting portion 4 and the crotch support portion 5 are not limited to those shown in Figures 8(A) and (B), but can be various shapes that can produce the aforementioned effects.

[0040] In the auxiliary sheet 10E shown in Figure 8(A), the connecting portion 4 may be omitted, and the fitting portion 1 and the crotch auxiliary portion 5 may be directly connected. In this case, the length (S5) of the crotch support portion 5 along the longitudinal direction Y is preferably 8.0 cm or more, more preferably 9.0 cm or more, and even more preferably 10.0 cm or more, from the viewpoint of further improving the absorbency of the crotch area. The length (S5) of the crotch support portion 5 along the longitudinal direction Y is preferably 15 cm or less, more preferably 13 cm or less, and even more preferably 11 cm or less, from the viewpoint of further improving the ability to prevent misalignment of the entire support sheet 10E.

[0041] Further examples of the auxiliary sheets of the present invention include auxiliary sheet 10G shown in Figure 10(A), auxiliary sheet 10I shown in Figure 11(A), and auxiliary sheet 10K shown in Figure 12. The auxiliary sheet 10G shown in Figure 10(A) includes the fitting portion 1, positioning portion 2, position adjustment portion 3, crotch auxiliary portion 5, and connecting portion 4. As a result, the aforementioned functions of each portion work together, and the auxiliary sheet 10G is more effective in preventing the absorbent material from shifting, reducing the amount of viscous excretory fluid such as loose stool adhering to the skin, and preventing leakage of the excretory fluid from behind. The auxiliary sheet 10I shown in Figure 11(A) includes a fitting portion 1, a positioning portion 2, and a connecting portion 4. The connecting portion 4 enhances the positional stability of the auxiliary sheet 10I. Furthermore, as shown in Figure 13, the connecting portion 4 is positioned behind the crotch area C of the urine absorption pad 100 as the front tip portion of the auxiliary sheet 10I. This further reduces the impact on the auxiliary sheet 10I caused by narrowing the width of the crotch area C during the installation of the urine absorption pad 100. The auxiliary sheet 10K shown in Figure 12(A) includes a fitting section 1, a positioning section 2, a position adjustment section 3, and a connecting section 4. The position adjustment section 3 improves the accuracy of the positioning process, and the connecting section 4 improves the positional stability of the auxiliary sheet 10I, both of which can be achieved simultaneously. Furthermore, similar to the auxiliary sheet 10I shown in Figure 11(A), the auxiliary sheet 10K has an even smaller impact on the auxiliary sheet 10K when the width of the crotch area C is narrowed during the operation of attaching the urine pad 100.

[0042] The auxiliary sheets 10G shown in Figure 10(A), 10I shown in Figure 11(A), and 10K shown in Figure 12 may each have an uneven shape in the thickness direction. For example, as shown in Figures 10(B), 11(B), and 12(B), auxiliary sheets 10H, 10J, and 10L may have recesses 8 arranged regularly in the planar direction. Having an uneven shape as shown in auxiliary sheets 10H, 10J, and 10L is preferable because, as mentioned above, it can further suppress the diffusion of highly viscous excretory fluid in the planar direction at the dorsal side R and groin area C, and improve the absorbency of liquid components. Furthermore, as mentioned above, in these configurations as well, the planar shapes of the fitting portion 1, positioning portion 2, position adjustment portion 3, connecting portion 4, and crotch support portion 5 are not limited to those shown in Figures 10(A) and (B), Figures 11(A) and (B), and Figures 12(A) and (B), but can be various shapes that can produce the aforementioned functions.

[0043] The crotch support portion 5 and the connecting portion 4 can also be formed from the same material as the aforementioned fitting portion 1. Furthermore, it is preferable that the thickness, rigidity, and weight of the crotch support portion 5 and the connecting portion 4 are within the preferred range indicated above for the fitting portion 1.

[0044] The auxiliary sheet of the present invention may be a combination of the various examples described above as appropriate. Such an auxiliary sheet of the present invention may be separate from the absorbent article, or it may be incorporated into the absorbent article. In other words, it may be an absorbent article equipped with the auxiliary sheet of the present invention. In the present invention, it is preferable that each constituent fiber of the auxiliary sheet contains an inorganic filler. Examples of inorganic fillers include titanium dioxide and other titanium oxides, silica, calcium carbonate, zinc oxide, etc. In the present invention, one of these inorganic fillers may be used alone, or two or more may be used in combination. Among these inorganic fillers, titanium oxide, and especially titanium dioxide, is particularly preferred in terms of the opacity of the nonwoven fabric. The inorganic filler content in the constituent fibers of the auxiliary sheet of the present invention is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, in the constituent fibers, from the viewpoint of improving the opacity of the color of the absorbed liquid. On the other hand, the inorganic filler content in the constituent fibers of the surface sheet and the intermediate sheet 30 is preferably 10% by mass or less, more preferably 9.0% by mass or less, and also preferably 0.5% by mass or more and 10% by mass or less, more preferably 1.0% by mass or more and 9.0% by mass or less.

[0045] The absorbent article has the basic structure described above (surface sheet, back sheet, absorbent, side sheet, and elastic member), and each member constituting the basic structure may be made of various materials commonly used in absorbent articles.

[0046] For example, the surface sheet is preferably made of a hydrophilic thermal bond nonwoven fabric, and particularly preferably an air-through nonwoven fabric, from the viewpoint of rapidly absorbing excretory fluid and transferring it to the absorbent material, and from the viewpoint of having a pleasant feel against the skin. The constituent fibers of the surface sheet are preferably thermoplastic resin fibers that have been treated to be hydrophilic, and the fibers are preferably three-dimensionally crimped, such as secondary or tertiary crimp. Specifically, polyethylene, polypropylene, polyester, nylon, and composite fibers thereof are prepared and coated with various hydrophilic agents before cutting them to a predetermined length and forming staples. As the hydrophilic agent, hydrophilic treatment with hydrophilic agents commonly used in this type of article can be used, such as various alkyl sulfonates represented by α-olefin sulfonates, acrylates, acrylate / acrylamide copolymers, esteramides, salts of esteramides, polyethylene glycol and its derivatives, water-soluble polyester resins, various silicone derivatives, various sugar derivatives, and mixtures thereof.

[0047] The backing sheet is not particularly limited as long as it prevents liquid permeation and has moisture permeability, but examples include a porous film obtained by melt-kneading a hydrophobic thermoplastic resin with a minute inorganic filler such as calcium carbonate or an immiscible organic polymer to form a film, and then uniaxially or biaxially stretching the film. Examples of the thermoplastic resin include polyolefins. Examples of polyolefins include high- to low-density polyethylene, linear low-density polyethylene, polypropylene, polybutene, etc., and these can be used alone or in mixtures.

[0048] Examples of absorbents include a mixture of hydrophilic fibers and superabsorbent polymer particles, a mixture of hydrophilic fibers, superabsorbent polymer particles, and thermoplastic synthetic resin fibers, or an absorbent sheet in which superabsorbent polymer particles are sandwiched between multiple fiber sheets. The hydrophilic fibers can be fibers having a hydrophilic surface, such as cellulose fibers or synthetic fibers that have been hydrophilized as needed with surfactants. In the case of the mixture, the entire mixture is covered with a permeable sheet such as tissue paper or a hydrophilic fiber nonwoven fabric to prevent deformation and shedding of polymer particles. The polymer particles can be starch-based, cellulose-based, or synthetic polymer-based.

[0049] As the side sheet, a water-repellent nonwoven fabric is preferred, and various water-repellent or water-repellent treated nonwoven fabrics can be used from among spunbond nonwoven fabrics, meltblown nonwoven fabrics, spunlace nonwoven fabrics, heat-rolled nonwoven fabrics, needle-punched nonwoven fabrics, etc. Particularly preferred are, for example, spunbond nonwoven fabric, spunbond-meltblown (SM) nonwoven fabric, spunbond-meltblown-spunbond (SMS), spunbond-meltblown-meltblown-spunbond (SMMS), spunbond-spunbond-meltblown-spunbond (SSMS) nonwoven fabric, etc.

[0050] As the elastic component, ordinary materials used in this type of article can be used. For example, materials such as synthetic rubbers like styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, and polyurethane can be used. In terms of form, thread-like or string-like materials (flat rubber, etc.) with a rectangular, square, circular, or polygonal cross-section can be used, or multifilament-type thread-like materials can be used. Specifically for thread-like rubber, those with the fineness described above can be used. [Explanation of Symbols]

[0051] 1. Fitting part 2 Positioning section 3 Position adjustment part 4. Connecting part 5. Crotch support section 10 (10A~10L) Auxiliary sheet for absorbent materials

Claims

1. An absorbent article having a longitudinal direction corresponding to the direction connecting the front, crotch, and back of the wearer, and a width direction perpendicular to the longitudinal direction, and having a pair of three-dimensional gathered portions on both side edges along the longitudinal direction, is used by being placed on the skin-contacting side of the absorbent article, Each of the three-dimensional gathered portions has an upright base end at the front and rear ends in the longitudinal direction and an upright base end on the outer side in the width direction, and is provided with a pocket space on the inner side in the width direction. The aforementioned auxiliary sheet for absorbent articles is In the pocket space of the pair of three-dimensional gathered portions, there is a fitting portion having a length that can be fitted in the width direction with respect to the length between the outward-facing base ends in the width direction, The pocket space of the pair of three-dimensional gathered portions has a pair of positioning portions that abut against the upright base end of the rear end in the longitudinal direction, The ratio (S1 / S2) of the length (S1) of the fitting portion along the longitudinal direction to the length (S2) of the three-dimensional gathered portion between the upright base end of the front end and the upright base end of the rear end is 0.10 or more and 0.50 or less. Auxiliary sheet for absorbent materials.

2. The auxiliary sheet for absorbent articles has a position adjustment section between the pair of positioning sections, The auxiliary sheet for absorbent articles according to claim 1, wherein the position adjustment portion has a shape that protrudes further to the rear in the longitudinal direction than the positioning portion.

3. The absorbent auxiliary sheet for the absorbent article according to claim 1, wherein the auxiliary sheet for the absorbent article has a crotch auxiliary portion located in front of the fitting portion in the longitudinal direction, and the length of the crotch auxiliary portion along the width direction is shorter than the length of the fitting portion along the width direction.

4. The absorbent auxiliary sheet for absorbent articles according to claim 3, wherein the auxiliary sheet for absorbent articles has a connecting portion between the fitting portion and the crotch auxiliary portion along the longitudinal direction, and the length of the connecting portion along the width direction gradually decreases from the fitting portion toward the crotch auxiliary portion.

5. The absorbent auxiliary sheet for articles according to any one of claims 1 to 4, wherein at least one of the fitting portion, the position adjustment portion, and the crotch support portion has a thickness of 2 mm or more.

6. At least one of the fitting portion, the position adjustment portion, and the crotch support portion has a weight of 35 g / m². ２ The above is the auxiliary sheet for absorbent articles according to any one of claims 1 to 4.

7. The auxiliary sheet for absorbent articles according to any one of claims 1 to 4, wherein at least one of the fitting portion, the position adjustment portion, and the crotch support portion has a rigidity of 0.25 or more.

8. The auxiliary sheet for absorbent articles according to any one of claims 1 to 4, wherein the length of the fitting portion along the longitudinal direction is 4 cm or more.

9. The auxiliary sheet for absorbent articles according to any one of claims 1 to 4, wherein when the absorbent article is stretched into a planar shape and the fitting portion is fitted into the pocket space, the length by which the fitting portion overlaps each of the three-dimensional gathered portions in the width direction is 1 cm or more.

10. The auxiliary sheet for absorbent articles according to claim 3 or 4, wherein the length of the crotch support portion along the width direction is 100 mm or less.

11. An absorbent article comprising an auxiliary sheet for absorbent articles as described in any one of claims 1 to 4.

12. A method for using an absorbent article, wherein the absorbent article has a longitudinal direction corresponding to the direction connecting the front, crotch, and back of the wearer, and a width direction perpendicular to the longitudinal direction, and has a pair of three-dimensional gathered portions on both side edges along the longitudinal direction, and is used by placing the absorbent article on the side that comes into contact with the skin, Each of the three-dimensional gathered portions has an upright base end at the front and rear ends in the longitudinal direction and an upright base end on the outer side in the width direction, and is provided with a pocket space on the inner side in the width direction. The aforementioned auxiliary sheet for absorbent articles is In the pocket space of the pair of three-dimensional gathered portions, there is a fitting portion having a length that can be fitted in the width direction with respect to the length between the outward-facing base ends in the width direction, The pocket space of the pair of three-dimensional gathered portions has a pair of positioning portions that abut against the upright base end of the rear end in the longitudinal direction, The ratio (S1 / S2) of the length (S1) of the fitting portion along the longitudinal direction to the length (S2) of the three-dimensional gathered portion between the upright base end of the front end and the upright base end of the rear end is 0.10 or more and 0.50 or less. In the pocket space of the pair of three-dimensional gathered portions of the absorbent article, the process of fitting the auxiliary sheet for the absorbent article in the width direction between the outward-facing base ends in the width direction, The process involves positioning the absorbent auxiliary sheet by abutting the positioning portion of the fitted absorbent auxiliary sheet against the upright base end at the rear end in the longitudinal direction, Method of using auxiliary sheets for absorbent materials, performed in this order or simultaneously.

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