Absorbent article

Abstract

Provided is an absorbent article capable of preventing side leakage and reducing discomfort. This absorbent article is provided with an absorbent body, a non-skin-side sheet, and a side sheet, in which wings are formed in the crotch region of the non-skin-side sheet, the side sheet comprising a width-direction outer side edge, a skin-side folded-back section, and a non-skin-side folded-back section, and a wing installation region corresponding to the wings in the longitudinal direction. The non-skin-side folded-back portion and the non-skin-side sheet are joined together to form a joining portion at a position closer to the inner side in the width direction than the outer side edge of the side sheet in the width direction, and the wing has a wing folded-back portion for folding back toward the non-skin side when the absorbent article is worn, and the wing folded-back portion is folded back toward the non-skin side in the width direction. The inner side edge in the width direction of the folded part of the wing is flush with the outer side edge in the width direction of the side sheet, and after five compression evaluation tests in the width direction are performed, the width reduction rate at the outer side edge in the width direction of the overall structure including the side sheet and the structure covered by the side sheet is smaller than the width reduction rate at the folded part of the wing.

Description

Technical Field

[0001] This application relates to an absorbent article. Background Technology

[0002] For example, when an absorbent article as disclosed in patent document CN219289927U is worn by a wearer, the absorbent article is easily deformed by the wearer's legs due to the wearer's movements, which may lead to side leakage or discomfort. Summary of the Invention

[0003] The problem the invention aims to solve

[0004] The purpose of this application is to provide an absorbent article that can prevent side leakage and reduce discomfort.

[0005] Solution for solving the problem

[0006] According to this application, an absorbent article is provided, having orthogonal length, width, and thickness directions, and having a crotch region, a front region forward of the crotch region, and a rear region backward of the crotch region. The absorbent article comprises: an absorbent body containing a fabric woven from fibers; a non-skin side panel disposed in the thickness direction at a position closer to the non-skin side than the absorbent body; and a side panel covering the outer ends of the fabric in the width direction from both sides. A protective wing is formed in the crotch region of the non-skin side panel, the wing being located on the non-skin side of the side panel and extending in the width direction to a position further outward than the side panel. The side panel includes: an outer edge in the width direction located outside the fabric in the width direction; and a skin-side fold. The fabric has a back section that folds back from the outer edge in the width direction toward the skin side of the fabric; and a non-skin side fold back section that folds back from the outer edge in the width direction toward the non-skin side of the fabric. In the wing setting area corresponding to the wing in the length direction, at a position closer to the inner side in the width direction than the outer edge in the width direction of the side piece, the non-skin side fold back section joins with the non-skin side piece to form a joint. The wing has a wing fold back section that folds back toward the non-skin side. In the width direction, the inner edge in the width direction of the wing fold back section is flush with the outer edge in the width direction of the side piece. After 5 width direction compression evaluation tests, the width reduction rate at the outer edge in the width direction of the overall structure, including the side piece and the structure it covers, is less than the width reduction rate at the wing fold back section of the wing.

[0007] In at least one embodiment, after 10 thickness-direction compression evaluation tests, the thickness reduction rate at the outer edge of the overall structure, including the side plate and the structure it covers, is less than the thickness reduction rate at the folded-back portion of the wing.

[0008] In at least one embodiment, in the front and rear regions, in the width direction, at a position further outward than the joint, the side piece and the non-skin side piece are joined together.

[0009] In at least one embodiment, a wing adhesive portion is provided on the non-skin side of the wing, and in the width direction, the wing adhesive portion is located on the outer side of the joint portion.

[0010] In at least one embodiment, the inner edge of the skin-side fold in the width direction is joined to the skin side of the fabric, while the outer edge in the width direction is not joined to the fabric.

[0011] In at least one embodiment, in the width direction, at a position further outward than the joint, a highly absorbent polymer is provided on the non-skin side of the fabric.

[0012] In at least one embodiment, the fibers have free ends at the outer edge of the fabric in the width direction.

[0013] In at least one embodiment, an absorbent sheet is provided on the non-skin side of the fabric, and the absorbent sheet has a high-density portion, which is formed by compressing the absorbent sheet from the non-skin side. In a cross section perpendicular to the thickness direction, at least a portion of the high-density portion is located between the fibers constituting the fabric.

[0014] In at least one embodiment, in the thickness direction, the high-density portion of the absorbent sheet is located on the non-skin side of the surface of the fabric on the skin side.

[0015] In at least one embodiment, the absorbent sheet has highly absorbent polymer particles with an average particle size smaller than the mesh size of the fabric, and the highly absorbent polymer particles are present in the high-density portion of the absorbent sheet.

[0016] In at least one embodiment, the fabric is located on the skin-closest side of the absorbent article.

[0017] In at least one embodiment, the fabric is a three-dimensional fabric.

[0018] The effects of the invention

[0019] According to this application, an absorbent article that can prevent side leakage and reduce discomfort can be provided. Attached Figure Description

[0020] Figure 1 This is a top view of the sanitary napkin of this application in its unfolded state.

[0021] Figure 2 yes Figure 1 Sectional view of section II-II.

[0022] Figure 3 This is a top view of the unfolded state of the sanitary napkin 1 of this application, showing the junction of the side panel and the non-skin side panel.

[0023] Figure 4 This is a schematic diagram of the fabric's outline.

[0024] Figure 5 This is a diagram showing the fabric.

[0025] Figure 6 It is a schematic diagram representing the largest inscribed circle between the lines of each mesh opening of the fabric.

[0026] Figure 7 This is a schematic diagram of the Y-shaped compression fixture used in five width-direction compression evaluation tests.

[0027] Figure 8 This is a diagram illustrating the sample preparation process in five width-direction compression evaluation tests.

[0028] Figure 9 This is a diagram illustrating the measurement sequence of five width-direction compression evaluation tests.

[0029] Figure 10A , Figure 10B , Figure 10C This is a diagram illustrating the method for thickness-direction compression evaluation testing. Among them, Figure 10A These are the top view and partial top view of the sample. Figure 10B These are partial top views and partial sectional views of the sample. Figure 10C These are partial top views and partial sectional views of the sample.

[0030] Explanation of reference numerals in the attached figures

[0031] T (thickness direction), T1 (skin side), T2 (non-skin side), S (groin area), F (front area), R (rear area), L (length direction), W (width direction), Y (maximum inscribed circle), 10 (surface sheet), 11 (absorbent body), 12 (non-skin side sheet), 13 (side sheet), 121 (wing), 111 (fabric), 13a (outer edge in width direction), 131 (skin side fold), 132 (non-skin side fold), 131a (inner side in width direction), 14 (joint), 15 (absorbent sheet), 151 (high-density part of absorbent sheet), 1211 (wing fold), 92 (lower jig), 90 (compression jig), 93 (upper jig). Detailed Implementation

[0032] The specific embodiments of this application will be described below with reference to the accompanying drawings. It should be noted that the following embodiments are merely illustrative of the technical solutions of this application and do not limit the scope of protection of this application. Modifications and alterations made within the scope of the technical concept of this application are all within the scope of protection of this application. Furthermore, all the accompanying drawings are schematic diagrams, and there may be discrepancies between the scale and the actual scale.

[0033] Furthermore, the following description uses sanitary napkins as an example. However, it is not limited to this; the absorbent material in this application can be sanitary napkins, panty liners, disposable diapers, etc.

[0034] In the following description, the stacking direction of each sheet constituting the absorbent article is defined as the thickness direction. In this thickness direction T, the side facing the wearer's skin when wearing the absorbent article is defined as the skin side T1 of the absorbent article, and the side away from the wearer's skin is defined as the non-skin side T2 of the absorbent article.

[0035] Additionally, the portion of the absorbent material corresponding to the wearer's vaginal opening is designated as the crotch area S; the area forward of the crotch area is designated as the front area F; and the area backward of the crotch area is designated as the rear area R. The crotch area S is also the area where the protective wings are installed. The direction from the front area towards the rear area or from the rear area towards the front area is designated as the length direction L, and the direction perpendicular to both the length and thickness directions is designated as the width direction W.

[0036] In this application, in the length direction L or the width direction W, the direction away from the center of the absorbent article is defined as the outer side, and the direction closer to the center of the absorbent article is defined as the inner side.

[0037] <Absorbent Items>

[0038] Figure 1 This is a top view of the sanitary napkin of this application in its unfolded state. Figure 2 yes Figure 1 Sectional view of section II-II. Figure 3This is a top view of the unfolded state of the sanitary napkin 1 of this application, showing the junction of the side panel and the non-skin side panel. Figure 4 This is a schematic diagram of the fabric's outline. Figure 5 This is a diagram showing the fabric. See below for reference. Figures 1-5 This application describes an absorbent article according to one embodiment.

[0039] like Figure 1 As shown, the sanitary napkin 1, as one embodiment of the absorbent article of the present invention, has a longitudinally elongated shape that is longer in the length direction L and shorter in the width direction W when viewed from above. It also has a predetermined longitudinally elongated shape in which both ends in the length direction L protrude in an arc shape towards the outside in the length direction L. Furthermore, the sanitary napkin 1 has a pair of protective wings 121 at its central portion in the length direction L, which protrude in a generally trapezoidal shape towards the outside in the width direction W.

[0040] like Figure 1 and Figure 2 As shown, the sanitary napkin 1 may include, from the skin side, a surface sheet 10, an absorbent body 11, a non-skin side sheet 12, and a side sheet 13. These will be described in sequence below.

[0041] <Surface sheet>

[0042] The surface sheet 10 is located on the skin-closest side T1 of the sanitary napkin 1 in the thickness direction T. There are no particular restrictions on the nonwoven fabric used as the surface sheet 11, as long as it possesses the properties suitable for use as a surface sheet in a sanitary napkin (e.g., liquid permeability, skin feel, softness, strength, etc.). For example, any nonwoven fabric such as needle-punched nonwoven fabric, hot-air nonwoven fabric, or spunbond nonwoven fabric can be used. Furthermore, the fibers constituting the surface sheet 11 can be cotton fibers, PP (polypropylene), PE (ethylene), PET, etc.

[0043] <Absorbent>

[0044] The absorbent 11 comprises a fabric 111 woven from fibers and an absorbent sheet 15 containing a highly absorbent polymer.

[0045] Fabric 111 can be made of PET, chemical fibers such as PE (ethylene), PP (polypropylene), and PEnylon. Various weaving methods suitable for the art can be used as the weaving method of fabric 111, and detailed descriptions are omitted here. Various structures suitable for the art can be used as the structure of fabric 111; for example, it can be a fabric woven on a single plane (e.g., a plain weave), or a three-dimensional fabric (e.g., a double-layer Raschel fabric where two pieces of fabric are connected by yarn, or other fabrics with a three-dimensional shape).

[0046] like Figure 5 As shown, the outer edge of the fabric in the width direction has a free end that is concave and convex in the width direction. Specifically, Figure 5 The free end of the fiber below is in the width direction (in Figure 5 The center section (roughly perpendicular to the drawing) is concave and convex. The free end refers to the end not connected to other fibers and capable of free movement. By making this area concave and convex, the contact area between the side panel and the fabric is increased, thus further transferring the fabric's resilience to the side panel. Therefore, even when the thighs are open or closed, the side panel does not easily stick together, maintaining a pleasant feel against the skin.

[0047] Absorbent sheet 15 is disposed on the non-skin side T2 of fabric 111. A high-density absorbent sheet portion 151 is provided in absorbent sheet 15, which is formed by compressing absorbent sheet 15 from the non-skin side T2. In a cross-section perpendicular to the thickness direction T, at least a portion of the high-density absorbent sheet portion 151 is located between the fibers of fabric 111. Specifically, the fabric has channels formed by weaving fibers into a mesh. The channels extend through the fabric along the thickness direction T. At least a portion of the high-density absorbent sheet portion 151 is located at a position corresponding to these channels.

[0048] like Figure 2 As shown, in the thickness direction T, the high-density portion 151 of the absorbent sheet is located on the non-skin side T2 of the surface of the fabric 111 on the skin side T1. This maintains the comfortable feel of the fabric against the skin while also improving the absorbency of bodily fluids.

[0049] The absorbent pad 15 contains highly absorbent polymer particles with an average particle size smaller than the mesh size of the fabric 111. Furthermore, these highly absorbent polymer particles are present within the high-density portion of the absorbent pad. This allows for easy transfer of bodily fluids from the fabric to the high-density portion of the absorbent pad, reducing backflow. Simultaneously, because the absorbent pad is embedded between the fabric fibers, it is fixed within the fabric, making it difficult for the surface sheet and three-dimensional weave to detach even when the body moves, thus easily following body movements. Moreover, the sanitary napkin can be easily bent starting from the high-density portion of the absorbent pad, further improving its conformability. Additionally, due to the high resilience of the fabric, the sanitary napkin is less prone to creases, thus reducing discomfort during wear.

[0050] The mesh size of a fabric can be measured using the following method.

[0051] The measurements were performed using a KEYENCE VXH-7000 digital microscope or a similar device at 50x magnification in a constant temperature and humidity chamber at 20±5℃ and 65±5% humidity, as described below. Furthermore, the above-described measuring equipment is merely an example; other equipment can also be used for measurement and evaluation as long as the same measurement conditions are met.

[0052] A sample of the fabric from a sanitary napkin, the object of measurement, was peeled off. Quadrilateral samples (approximately 5cm x 5cm) were cut from the liquid nitrogen-frozen sample and then evaluated using samples air-dried at 20°C and 65% humidity for 24 hours. Magnified images of the sample's front side (the plane seen when viewing the fabric from above) were acquired using a digital microscope (e.g., a KEYENCE VXH-7000 or similar device). The magnified images were observed, as shown... Figure 6 As shown, select any number (e.g., 10) of meshes and take the average diameter of the largest inscribed circle Y between the lines of each mesh hole as the mesh hole diameter.

[0053] Preferably, when viewed from above, the area of ​​the absorbent pad within each unit area of ​​fabric in the crotch area is larger than that in the front and back areas. This improves absorbency at the site where bodily fluids are expelled. Furthermore, by reducing the area of ​​the absorbent pad within each unit area of ​​fabric in the front and back areas, when the anti-deviation component for securing the sanitary napkin to the underwear is adhered to the sanitary napkin, the back of the sanitary napkin is less prone to unevenness, thus ensuring stable adhesion between the starting and ending points of the anti-deviation component and the sanitary napkin.

[0054] <Side photos and non-skin side photos>

[0055] Side sheets 13 cover the outer ends of the surface sheet 10 and the absorber 11 in the width direction from both sides in the width direction W. Specifically, the side sheet 13 includes an outer edge 13a in the width direction, a skin-side fold-back portion 131, and a non-skin-side fold-back portion 132. The outer edge 13a of the side sheet 13 in the width direction is located outside the surface sheet 10 and the absorber 11 in the width direction W. The skin-side fold-back portion 131 folds back from the outer edge 13a in the width direction towards the skin side T1 of the surface sheet 10, and the non-skin-side fold-back portion 132 folds back from the outer edge 13a in the width direction towards the non-skin side T2 of the absorber 11.

[0056] In addition, the inner side 131a of the skin side fold 131 in the width direction is attached to the skin side of the surface sheet 10, while the outer edge in the width direction is not attached to the surface sheet 10.

[0057] The non-skin side sheet 12 is positioned in the thickness direction T on the non-skin side of the absorbent 11. The non-skin side sheet 12 is liquid-impermeable. A protective wing 121 is formed in the crotch area S of the non-skin side sheet 12. The protective wing 121 is located on the non-skin side T2 of the side sheet 13 and extends in the width direction W to a position further outward than the side sheet 13.

[0058] like Figure 2 , Figure 3As shown, along the length L of the sanitary napkin 1, at a position on the inner side of the width W direction, closer to the outer edge 13a of the side panel 13 than in the width direction, the non-skin side fold-back portion 132 joins with the non-skin side panel 12 to form a joint portion 14. Here, for example, an adhesive can be used to form the joint portion 14, but it is not limited to this; other suitable methods such as heat fusion can also be used.

[0059] In the front region F and the rear region R, in the width direction W, at a position further outward than the joint 14, the side piece 13 and the non-skin side piece 12 are joined together. Specifically, as... Figure 3 As shown, the joint position of the side piece 13 and the non-skin side piece 12 in the crotch region S is more inward in the width direction than the joint position of the side piece 13 and the non-skin side piece 12 in the front region F and the joint position of the side piece 13 and the non-skin side piece 12 in the rear region R. Therefore, in the wearer's crotch area, the side pieces are compressed inward in the width direction, deforming in a way that the joint 14 is raised towards the skin, thus forming a leak-proof wall. The deformation of the side pieces on both sides in the width direction makes the skin contact with the wearer's groin area gentler, and the leak-proof wall can suppress side leakage of excrement.

[0060] <Wing Fold-back section>

[0061] like Figure 1 , Figure 2 As shown, the wing 121 has a wing-folded portion 1211 that folds back towards the non-skin side. In the width direction W, the inner edge of the wing-folded portion 1211 is flush with the outer edge 13a of the side panel 13 in the width direction. The wing 121 folds back towards the non-skin side T2 at the wing-folded portion 1211. The position of the folded portion 1211 simulates the portion folded back towards the outside of underwear when wearing a sanitary napkin. For ease of quantitative description of this technical solution, the position of this fold is defined as being flush with the outer edge 13a of the side panel 13 in the width direction. It is understood that slight differences in the width reduction rate of the wing near the wing-folded portion (described later) will not affect the realization of this technical solution and its effect. In addition, a wing adhesive portion 1212 is provided on the non-skin side T2 of the wing 121. In the width direction W, the wing adhesive portion 1212 is located outside the joint portion 14. When wearing the sanitary napkin 1, the wing 121 can be fixed to the clothing using the wing adhesive part 1212. This allows the wing 121 to be fixed in a suitable position, preventing the wing 121 from sticking up to the side panel 13 and reducing discomfort caused by the wing 121.

[0062] In this application, the thickness, material, and joint position of the side panels are designed to ensure that, after five width-direction compression evaluation tests, the width reduction rate at the outer edge of the overall structure of the side panel 13 and its covered structure is less than the width reduction rate at the folded-back portion 1211 of the wing 121. This test simulates the actual situation where the inner thigh repeatedly contacts the side of the sanitary napkin while it is being worn.

[0063] Furthermore, in this application, the thickness, material, and joint position of the side panels are designed to ensure that, after 10 thickness-direction compression evaluation tests, the thickness reduction rate at the outer edge of the side panel 13 and the overall structure it covers in the width direction is less than the thickness reduction rate at the folded-back portion 1211 of the wing 121. This test simulates the actual situation where, while wearing a sanitary napkin, for example, one repeatedly sits down and presses the side area of ​​the sanitary napkin multiple times in the thickness direction at the groin area.

[0064] <Other Implementation Methods>

[0065] In this application, the fabric 111 can also be positioned at the skin-closest side T1 of the sanitary napkin 1. In this case, those skilled in the art will readily understand that the relationship between the fabric 111 and other components is the same as in the previous embodiment, and therefore will not be described in detail. This allows for improved elasticity of the absorbent article using the fabric, thus enhancing comfort. Furthermore, bodily fluids are easily guided to the high-density portion of the absorbent pad, improving the absorbency of the absorbent article. Additionally, since at least a portion of the high-density portion of the absorbent pad is located between the fibers of the fabric, the surface sheet and the absorbent pad can be fixed together, preventing them from peeling off due to the wearer's movements, thereby improving the absorbent article's responsiveness to the wearer's actions.

[0066] Furthermore, in the above embodiment, a highly absorbent polymer is present throughout the entire area of ​​the absorbent sheet 11. However, this is not a limitation. In the width direction W, as long as the highly absorbent polymer is provided on the non-skin side T2 of the fabric 111 at least outside the joint 14, it is sufficient. Thus, after absorbing bodily fluids, the highly absorbent polymer expands, easily creating a gap between the side panel and the wing, further reducing discomfort. The absorbent sheet 11 is not essential and can be omitted as needed.

[0067] <Wide-direction compression evaluation test>

[0068] Test conditions:

[0069] Tensile testing machine: INSTRON 3343

[0070] Electric burette: Metrohm Dosimat 776

[0071] Load sensor: 100N

[0072] V-DIS: 5ml / dose

[0073] Compression displacement: 20mm

[0074] Rate: 60ml / min

[0075] Furthermore, the above-mentioned testing equipment is just one example; other equipment can also be used to conduct the test as long as the same testing conditions are met.

[0076] Y-shaped compression fixture 90 Figure 7 As shown, the Y-shaped compression fixture 90 is formed by a plate-like component on the top and symmetrically branching into two claw-like portions on the bottom. The plate-like component has a width (a) of 15 mm, a length (b) of 30 mm, and a thickness (c) of 2 mm. The claw-like portions have a length (d) of 7 mm and a width of 15 mm, the same as the plate-like component. The angle (θ) between the two claws is 50°–55°. The Y-shaped compression fixture 90 is made of SUS304 stainless steel.

[0077] Sample preparation for measurement:

[0078] like Figure 8 The measurement sample is prepared as shown. First, the center point of the sanitary napkin 1 is determined. This center point is the intersection of the perpendicular line passing through the center of the length direction of the wings and the perpendicular line passing through the center of the width direction of the sanitary napkin 1. Then, the measurement sample is cut out within the following range: draw 5cm line segments on both sides of the length direction L from the center point, and draw two straight lines from the two ends of these 10cm line segments towards the width direction W. The portion enclosed by the 10cm line segments and the two straight lines is cut out. Finally, fold the wings back along the outer edge of the side panel towards the non-skin side and fix them to the back of the sanitary napkin. Thus, the preparation of the measurement sample is completed.

[0079] Measurement method:

[0080] like Figure 9 As shown in (a), place the measurement sample and mark the center point C of the measurement sample as the drop position described later. This center point C is the center of the sample in both the length and width directions. Fix the electric burette 91 at a height of 10 mm above the drop position and drip 5 ml of physiological saline at a flow rate of 60 ml / min.

[0081] like Figure 9 As shown in (b), after the saline dripping step is completed, the measurement sample is left for 1 minute. Then, the measurement sample is moved to the tensile testing machine, and the portion of the measurement sample 30 mm from the outer edge of the side plate is fixed using the lower fixture 92. That is, the measurement sample is exposed for 30 mm above the lower fixture for subsequent compression steps.

[0082] Fix the Y-shaped compression fixture 90 to the upper fixture 93, compressing the sample by 20 mm so that the outer edge of the side piece of the measurement sample is located between the two claws, and hold for 10 minutes. Then, return the upper fixture 93 to the uncompressed position and hold for 5 minutes. Repeat this process to complete one compression. Perform this compression cycle 5 times.

[0083] like Figure 9 As shown in (c), after five compressions, the width of the measurement sample is measured while it is held in place by the lower fixture 92. Specifically, the width at the outer edge of the overall structure of the side plate and the absorber 11 it covers, and the width at the folded-back portion 1211 of the wing are measured. The width reduction rate is calculated using the following formula 1.

[0084] Width reduction rate = Width reduction amount (= Initial width before test 30mm - Width after test) ÷ Initial width 30mm × 100%

[0085] The results of measurements taken using sanitary napkin 1 with the structure of this application and sanitary napkin A without fabric are shown in Table 1 below.

[0086] Table 1

[0087]

[0088] It can be seen that after five compression evaluation tests in the width direction, the width reduction rate at the outer edge of the overall structure of the side panel and its covering is less than the width reduction rate at the folded-back position of the wing. In contrast, sanitary napkin A, which contains a highly absorbent polymer and pulp absorbent body, exhibits the opposite behavior. In sanitary napkin 1, because the fabric's resilience is superior to that of the wings and it is less prone to deformation, wrinkles are less likely to form, and the fabric easily contacts the thigh when the user moves their legs. Since the fabric feels good against the skin and provides a continuous contact sensation, the user's anxiety about lateral leakage is reduced.

[0089] Furthermore, it should be noted that the above measurements are based on an absorbent body of sanitary napkin 1 containing 100% PET fabric and an absorbent sheet containing a highly absorbent polymer. However, sanitary napkin 1 may not contain an absorbent sheet containing a highly absorbent polymer, but it only needs to contain fabric. In this case, the reduction rate of the width at the outer edge of the side panel and the fabric it covers, as well as the width at the folded-back portion of the wings, is measured. The measurement results and corresponding effects are the same as the above measurement results.

[0090] <Thickness Direction Compression Evaluation Test>

[0091] like Figure 10AAs shown, an 8cm sample is cut from the liquid nitrogen-frozen sample, using the center (e.g., the intersection of a perpendicular line passing through the center of the length direction of the wing and a perpendicular line passing through the center of the width direction of the sanitary napkin) as a reference. Then, the wing is folded back along the outer edge of the side panel in the width direction and attached to the back, and cut along a perpendicular line passing through the center of the width direction of the sanitary napkin. When measuring the thickness value at the outer edge of the width direction of the overall structure of the side panel and the absorbent body it covers, as shown... Figure 10B As shown, the entire structure of the side plate and the absorber it covers is cut along the joint. When measuring the thickness value at the folded-back part of the wing, as... Figure 10C As shown, the protective wing was cut along the joint. The sample was then evaluated using a sample that had been air-dried for 24 hours at 20°C and 65% atmosphere. Using a compression testing machine KES-G5 or similar from KATO TECH Co., Ltd., after zeroing, the sample was placed directly below the sensor and set on the measuring stage to perform 10 compression recovery cycles. Under the following measurement conditions, the initial thickness before one compression and the thickness after 10 compressions were measured at the outer edge of the side plate and the absorber it covers in the width direction of the overall structure, and at the folded-back portion of the protective wing.

[0092] (Measurement conditions)

[0093] Load sensor: 1000N

[0094] Compression (pressure area) = 2cm 2

[0095] Compression speed: 0.02mm / sec

[0096] Maximum compressive load (upper limit load): 50 N / m 2

[0097] SENS: 2

[0098] The thickness reduction rate at the outer edge of the side plate and the absorber it covers in the width direction of the overall structure and the thickness reduction rate at the folded part of the wing were measured under the above measurement conditions, as shown in Table 2 below.

[0099] Table 2

[0100]

[0101] *T01 refers to the initial thickness of the material before one compression.

[0102] *T010 times refers to the thickness of the material after 10 compressions.

[0103] *Thickness reduction rate = (T01 times - T010 times) / T01 times × 100%

[0104] Table 2 shows that the thickness reduction rate at the outer edge of the side panel and its covering absorbent body in the width direction is less than the thickness reduction rate at the folded-back portion of the wing. This indicates that the elasticity of the overall structure of the side panel and its covering absorbent body is higher than that at the folded-back portion of the wing. Therefore, compared to the wing, the fabric has higher resilience in the thickness direction, thus reducing discomfort during use while maintaining a sense of security due to the material's resistance to deformation.

[0105] Similarly, the above measurements are based on an absorbent body of sanitary napkin 1 containing 100% PET fabric and an absorbent sheet containing a highly absorbent polymer. However, sanitary napkin 1 may not contain an absorbent sheet containing a highly absorbent polymer; it only needs to contain fabric. In this case, the thickness reduction rate at the outer edge of the width direction of the side panel and the fabric it covers, and the thickness reduction rate at the folded-back portion of the wings, are measured. The measurement results and corresponding effects are the same as those described above.

[0106] <Effects>

[0107] In this application, by covering the outer side of the fabric in the width direction with a side panel without joining the fabric to the wing fixed to the underwear, discomfort caused by the difference in rigidity and elasticity between the wing and the fabric can be reduced. Furthermore, on the non-skin side of the fabric, the side panel joins the wing located on the non-skin side of the side panel at a position closer to the inner side in the width direction than the outer edge of the side panel in the width direction. This allows the fabric to easily stand upright from the joint point between the side panel and the wing, effectively suppressing lateral leakage. In addition, since there is a side panel on the skin side of the fabric, leakage can also be suppressed when liquid is transferred along the cross-section within the fabric. Moreover, because the fabric's resilience is superior to that of the wing and it is less prone to deformation, wrinkles are less likely to form, and the fabric easily contacts the thigh when the user moves their legs. Because the fabric has a good feel against the skin and provides a continuous contact sensation, the user's anxiety about lateral leakage can be reduced.

[0108] This application is not limited to the above-described embodiments, and various changes and modifications can be made within the scope of the technical concept of this application.

[0109] Industrial availability

[0110] According to this application, an absorbent article that can prevent side leakage and reduce discomfort can be provided.

Claims

1. An absorbent article having a length direction, a width direction and a thickness direction orthogonal to each other, and having a crotch region, a front side region on a front side of the crotch region, and a back side region on a back side of the crotch region, characterized by comprising: an absorbent body containing a fabric woven from fibers; a non-skin side sheet disposed on a non-skin side of the absorbent body in the thickness direction; and a side sheet covering width direction outer end portions of the fabric from both sides in the width direction, a wing is formed in the crotch region of the non-skin side sheet, the wing is located on the non-skin side of the side sheet and extends to a position on the outer side of the side sheet in the width direction, the side sheet includes: a width direction outer side edge located on the outer side of the fabric in the width direction; a skin side turn-back portion turned back from the width direction outer side edge to the skin side of the fabric; and a non-skin side turn-back portion turned back from the width direction outer side edge to the non-skin side of the fabric, a wing provided region corresponding to the wing in the length direction is formed at a position on the inner side in the width direction of the width direction outer side edge of the side sheet, the non-skin side turn-back portion and the non-skin side sheet are joined together to form a joint portion, the wing has a wing turn-back portion turned back to the non-skin side, a width direction inner side edge of the wing turn-back portion is flush with the width direction outer side edge of the side sheet in the width direction, and a width reduction rate at the width direction outer side edge of the entire structure including the side sheet and the structure covered thereby is smaller than a width reduction rate at the wing turn-back portion of the wing after 5 width direction compression evaluation tests.

2. The absorbent article according to claim 1, wherein a thickness reduction rate at the width direction outer side edge of the entire structure including the side sheet and the structure covered thereby is smaller than a thickness reduction rate at the wing turn-back portion of the wing after 10 thickness direction compression evaluation tests.

3. The absorbent article according to claim 1, wherein the side sheet and the non-skin side sheet are joined together at a position on the outer side of the joint portion in the width direction in the front side region and the back side region.

4. The absorbent article according to claim 1, wherein a wing adhesive portion is provided on the non-skin side of the wing, and the wing adhesive portion is located at a position on the outer side of the joint portion in the width direction.

5. The absorbent article according to claim 1, wherein a width direction inner side edge of the skin side turn-back portion is joined to the skin side of the fabric, and a width direction outer side edge is not joined to the fabric.

6. The absorbent article according to claim 1, wherein a high-absorbency polymer is provided on the non-skin side of the fabric at a position on the outer side of the joint portion in the width direction.

7. The absorbent article according to claim 1, wherein the fibers have free ends at the width direction outer side edge of the fabric. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 8. The absorbent article according to claim 1, characterized in that an absorbent sheet is provided on the non-skin side of the fabric, and an absorbent sheet high density portion is provided on the absorbent sheet, the absorbent sheet high density portion being formed by compressing the absorbent sheet from the non-skin side, at least a part of the absorbent sheet high density portion is located between the fibers constituting the fabric in a cross section perpendicular to the thickness direction.

9. The absorbent article according to claim 8, characterized in that in the thickness direction, the absorbent sheet high density portion is located on the non-skin side of the surface of the skin side of the fabric.

10. The absorbent article according to claim 8, characterized in that the absorbent sheet has high-absorbency polymer particles, the average particle diameter of the high-absorbency polymer particles is smaller than the pore diameter of the mesh of the fabric, and the high-absorbency polymer particles are present in the absorbent sheet high density portion.

11. The absorbent article according to claim 1, characterized in that the fabric is located at the position closest to the skin of the absorbent article.

12. The absorbent article according to any one of claims 1 to 11, characterized in that the fabric is a three-dimensional fabric.

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