Panty-type sanitary napkin

Abstract

The present application provides a short pants type sanitary napkin which seeks to improve both the functionality as a sanitary napkin and the design which fits into life. A short pants type sanitary napkin (1) has a fastening member (30) whose left and right direction outer end portion is fixed to a waist member (20) in a non-detachable manner, and whose inner end portion is detachably fastened to a front waist portion, wherein the short pants type sanitary napkin (1) has a crotch elastic member (15) which is provided at a position on the non-skin side of an absorbent core (11), which is stretchable in the up and down direction, and which has a curved convex shape in which only one portion protrudes from the left and right direction outer side toward the inner side in a central region which is three-equalized in the up and down direction, and wherein the color of at least a portion of the member of the front waist portion and the color of at least a portion of the fastening member are the same color system when viewed from the non-skin side, and differ in depth.

Description

Technical Field

[0001] This invention relates to shorts-type sanitary napkins. Background Technology

[0002] Previously known absorbent articles, such as disposable diapers, could also be used as belt-type (unfoldable) items by partially separating the waistband member, which was originally shaped like underwear (shorts). Patent Document 1 discloses a shorts-type sanitary napkin having: an easy-tear line (separation section) extending from the edge of the waist opening to the edge of the leg opening; and an engaging member, one end of which is fixed to the waistband member, and the other end of which is detachably engaged with the waistband member. By tearing the waistband member along the easy-tear line, it can be separated front and back, thus allowing it to be worn in the same manner as a belt-type item.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent documents International Publication No. 2024 / 111557 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] According to Patent Document 1, the shorts-type sanitary napkin is easy to put on and take off. This requires the sanitary napkin to have good put-and-take properties and minimal leakage. On the other hand, if the functionality of the sanitary napkin is improved by installing snap-fit ​​components, it will resemble the appearance of a disposable diaper. Users of sanitary napkins feel uncomfortable about having others know they are menstruating. Therefore, while demanding functionality, sanitary napkins also need to have a design that minimizes the appearance of absorbent items like disposable diapers and integrates into daily life. There is still room for improvement in this regard.

[0008] The present invention was made in view of the above-mentioned problems, and its object is to provide a panty-type sanitary napkin that seeks to improve both the functionality of the sanitary napkin and the design for integration into daily life.

[0009] Solution for solving the problem

[0010] The main technical solution for achieving the above objectives is a panty-type sanitary napkin, which has intersecting vertical and horizontal directions. This panty-type sanitary napkin comprises: an absorbent body having a liquid-absorbing core; a waist member having a front waist section and a back waist section; and a locking member, the outer end of which is fixed to the waist member in a non-separable manner in the horizontal direction, and the inner end of which is detachably engaged with the non-skin side of the front waist section. The front waist section and the back waist section are joined by a pair of lateral connections at their two ends in the horizontal direction. The components are interconnected, characterized in that the shorts-type sanitary napkin has a crotch elastic member, which is positioned closer to the non-skin side than the absorbent core, and stretches along the vertical direction. In the stretched state of the shorts-type sanitary napkin, the locking member has a convex shape with only one part protruding from the outside to the inside in the central region of the three regions when the locking member is divided into three equal parts in the vertical direction. When viewed from the non-skin side, at least a portion of the color of the component of the front waist part is a colored component of the same color family as at least a portion of the color of the locking member, but with different shades.

[0011] Other features of the invention will become clear from the description and drawings herein.

[0012] The effects of the invention

[0013] According to the present invention, a panty-type sanitary napkin can be provided that combines improved functionality as a sanitary napkin with improved design for integration into daily life. Attached Figure Description

[0014] Figure 1 This is a rough 3D diagram of sanitary napkin 1.

[0015] Figure 2 This is a schematic top view of a sanitary napkin 1 in its unfolded and elongated state as observed in the thickness direction.

[0016] Figure 3 yes Figure 2 A schematic diagram of the AA section.

[0017] Figure 4A and Figure 4B This diagram illustrates the action of separating the waist component 20 of the sanitary napkin 1 from the front to the back.

[0018] Figure 5 This is a general front view of a sanitary napkin 1 in its natural state.

[0019] Figure 6 This is an illustration of the color of a sanitary napkin 1 when viewed from the non-skin side in its unfolded and stretched state.

[0020] Figure 7 This is an explanatory diagram of the shape of the engaging member 30.

[0021] Figure 8 This diagram shows the state in which the engaging member 30 is opened, exposing the engaging part 32.

[0022] Figure 9 These are explanatory diagrams of the engaging parts 33 and 34 of the engaging member 30.

[0023] Figure 10 This is a cross-sectional schematic diagram of the engaging component 30.

[0024] Figure 11 This is a diagram showing an example of a modified version of the engaging member 30.

[0025] Figure 12 This is a diagram illustrating an example of the structure of the separation section 50.

[0026] Figure 13 This is an explanatory diagram showing the color of the sanitary napkin 2 in the second embodiment when viewed from the non-skin side in its unfolded and stretched state.

[0027] Figure 14A This is a cross-sectional diagram of the front waist section at 20f. Figure 14B This is a cross-sectional diagram of the lower back section 20b.

[0028] Explanation of reference numerals in the attached figures

[0029] 1. (Shorts type) Sanitary napkin; 2. (Shorts type) Sanitary napkin; 1a. Waist opening; 1b. Leg opening; 10. Absorbent core; 11. Absorbent insert; 12. Top sheet; 13. Bottom sheet; 13a. Liquid-proof sheet; 13b. Hydrophobic sheet; 14. Leak-proof wall section; 14a. Leak-proof wall elastic component; 15. Crotch elastic component; 20. Waist section component; 20f. Front waist section; 20b. Back waist section; 21. Non-skin side sheet (3rd sheet); 22. Skin side sheet (1st sheet); 23. Skin side sheet; 24. Middle layer sheet (2nd sheet); 26. Waist section elastic component; 30. Engaging component; 31. Substrate sheet; 311. First substrate sheet 311; 312. Second substrate sheet 312; 32. Engaging part; 321. Hook; 33. Engaging part drawing (top side drawing); 34. Engaging part drawing (root side drawing); 40. Lateral joint; 50. Separation part; 51. Notch; 511. Upper notch; 512. Lower notch; 513. Middle notch; 52. Non-notch; 60. Drawing; 71. First substrate sheet compression part; 72. Second substrate sheet compression part; 73. Top side compression part; 74. Engaging part compression part (compression part). Detailed Implementation

[0030] Based on the description in this specification and the accompanying drawings, at least the following matters become clear.

[0031] (Option 1)

[0032] A shorts-type sanitary napkin has intersecting vertical and horizontal directions. The shorts-type sanitary napkin comprises: an absorbent body having a liquid-absorbing core; a waistband having a front waistband and a back waistband; and a locking member, the outer end of which is fixed to the waistband in a non-separable manner in the horizontal direction, and the inner end of which is detachably engaged with the non-skin side of the front waistband. The front waistband and the back waistband are joined together at their two ends in the horizontal direction by a pair of lateral joints. The shorts-type sanitary napkin has a crotch elastic member, which is located on the non-skin side closer to the absorbent core. It stretches and extends along the vertical direction. In the stretched state of the shorts-type sanitary napkin, the locking member has a convex shape with only one part protruding from the outside to the inside in the central region of the three regions when the locking member is divided into three equal parts in the vertical direction. When viewed from the non-skin side, at least a portion of the color of the member of the front waist part is a colored color of the same color family as at least a portion of the color of the locking member, but with different shades.

[0033] According to Option 1, the snap fasteners facilitate the putting on and taking off of sanitary napkins. The elastic crotch component prevents leakage of excrement. Furthermore, due to the aforementioned shape of the snap fasteners, users can easily identify where to grasp them, and the snap fasteners fit comfortably with the fingers. Additionally, the snap fasteners have a small area of ​​deflection on both sides in the vertical direction at the user's grasping position, allowing for efficient pulling. This improves the functionality of the sanitary napkin. Moreover, the shape of the snap fasteners differs from the generally rectangular shape used in most disposable diapers. Furthermore, since the color of the front waist component is the same as the snap fastener color, it creates an appearance different from the white disposable diaper, and prevents the snap fasteners from being too conspicuous. Therefore, the sanitary napkin's design reduces its appearance from that of a disposable diaper, improving its integration into daily life. However, due to the difference in shade, users can still identify the snap fasteners.

[0034] (Option 2) The shorts-type sanitary napkin as described in Option 1, wherein,

[0035] In the stretched state of the shorts-type sanitary napkin, when viewed from the non-skin side, at least a portion of the color of the front waist component, at least a portion of the color of the locking component, and at least a portion of the color of the rear waist component are colored in the same color family, but with different shades.

[0036] According to Option 2, the colored areas of the same color family in the sanitary napkin are enlarged, reducing the appearance resembling disposable diapers and improving its design for everyday use. However, due to the different shades in each part, the locking components are easily identifiable, and it is easier to determine the front and back of the sanitary napkin.

[0037] (Option 3) The shorts-type sanitary napkin according to Option 1 or 2, wherein,

[0038] The front waist section has a separation portion for separating the waist member, and in the portion of the front waist section located inside the separation portion in the left-right direction, three or more sheets are stacked in the thickness direction of the front waist section.

[0039] According to Option 3, the rigidity of the inner part of the front waist section in the left-right direction is increased compared to the separation section, making it easier for the user to grasp the remaining edge of the front waist section and thus easier to pull. In addition, the engaging component is made easier to engage with the flatter part of the front waist section.

[0040] (Option 4) The shorts-type sanitary napkin described in Option 3, wherein,

[0041] In the portion of the front waist section located on the inner side in the left-right direction than the separated portion, a first piece, a second piece, and a third piece are stacked from the skin side in the thickness direction toward the non-skin side. A waist elastic member that can stretch in the left-right direction is provided between the first piece and the second piece. The waist elastic member is not provided between the second piece and the third piece. The second piece and the third piece have portions that are not joined to each other.

[0042] According to Option 4, the influence of the engaging component that engages with the front waistline is less likely to affect the waistline elastic component. Furthermore, it reduces the force applied to the waistline elastic component when disengaging the engaging component. Therefore, it can suppress the functional decline of the waistline elastic component caused by the disassembly and reassembly of the engaging component, maintaining the fit of the front waistline.

[0043] (Solution 5) The shorts-type sanitary napkin according to any one of Solutions 1 to 4, wherein,

[0044] In the stretched state of the shorts-type sanitary napkin, when viewed from the non-skin side, the color of the locking member is darker than the color of the member of the same color family as the front waist part.

[0045] According to Option 5, the locking mechanism is easily identifiable by the user. Therefore, the user can use the locking mechanism as needed, maximizing the ease of wearing the sanitary napkin.

[0046] (Solution 6) The shorts-type sanitary napkin according to any one of Solutions 1 to 5, wherein,

[0047] In the stretched state of the shorts-type sanitary napkin, the area where the uppermost region of the front waist part overlaps with the uppermost region of the four regions when the side joint is divided into four equal parts in the vertical direction is defined as the upper end region, and the area where the front waist part overlaps with the third region from the upper side in the vertical direction is defined as the middle region. At this time, when viewed from the non-skin side, the color of the same color scheme in the upper end region is darker than the color of the same color scheme in the middle region.

[0048] According to Option 6, the sanitary napkins will resemble the appearance of underwear (shorts) with rubber in the waist area, thus enhancing their design and integration into daily life.

[0049] (Solution 7) The shorts-type sanitary napkin according to any one of Solutions 1 to 6, wherein,

[0050] The absorbent body has a backing sheet disposed on the non-skin side of the absorbent core. The backing sheet has a pattern that can be visually recognized from the non-skin side of the panty-type sanitary napkin. When viewed from the non-skin side in the stretched state of the panty-type sanitary napkin, at least a portion of the pattern on the backing sheet is a colored color of the same color family as the color of the front waistband component, but with different shades.

[0051] According to Option 7, the pattern will not be too conspicuous, achieving a sense of design unity while allowing users to identify the pattern. Furthermore, the appearance of sanitary napkins differs from that of disposable baby diapers, which often feature prominent patterns, enhancing the design's integration into daily life.

[0052] (Solution 8) The shorts-type sanitary napkin as described in Solution 7, wherein,

[0053] The locking member has a locking portion with multiple hooks. In the stretched state of the shorts-type sanitary napkin, the average brightness of the color of the locking portion when viewed from the surface side is higher than the average brightness of the color of the front waist part when viewed from the non-skin side, the average brightness of the color of the locking member, and the average brightness of the color of the pattern on the film.

[0054] According to Option 8, the engaging part is conspicuous when the engaging component is opened, making it easy for the user to identify. Therefore, the user can reliably engage the engaging component with the front waist while being aware of the location of the engaging part.

[0055] (Solution 9) The shorts-type sanitary napkin according to any one of Solutions 1 to 8, wherein,

[0056] The locking member has a locking portion with multiple hooks and a base plate supporting the locking portion. The locking member has a locking portion pattern that can be visually identified from the non-skin side of the panty-type sanitary napkin. The locking portion pattern in the region of the locking member that is more inward in the left-right direction than the locking portion is different from the locking portion pattern in the region of the locking member that is more outward in the left-right direction than the locking portion.

[0057] According to Scheme 9, the top part of the locking component can be distinguished from other areas, making it easy for the user to identify the position of the locking component.

[0058] (Solution 10) The shorts-type sanitary napkin according to Solution 9, wherein,

[0059] The engagement pattern is formed by compressing the substrate sheet in the thickness direction of the engagement member, and the maximum depth of the compressed portion in the engagement pattern of the inner region is deeper than the maximum depth of the compressed portion in the engagement pattern of the outer region.

[0060] According to Scheme 10, the engaging pattern on the inner side is prominent, making it easy for the user to identify and grasp the engaging member. Furthermore, the top of the engaging member is easily bent from the compression point. Therefore, the engaging member fits comfortably with the fingers and is easy to grip, improving its operability.

[0061] (Scheme 11) A panty-type sanitary napkin according to any one of Schemes 1 to 10, wherein,

[0062] The engaging member has an engaging portion with multiple hooks and a base plate supporting the engaging portion. The engaging portion and the base plate are joined by an adhesive and fused together at the compression portion.

[0063] According to Solution 11, the integration of the engaging part and the base plate is improved. Furthermore, the compression portion is clearly visible when the engaging member is opened, making it easy for the user to identify the engaging part. Therefore, the user can reliably engage the engaging member with the front waist section while being aware of the location of the engaging part.

[0064] (Solution 12) The shorts-type sanitary napkin according to Solution 11, wherein,

[0065] When viewed in the thickness direction of the engaging member, portions of the plurality of hooks partially overlap with the compression portion.

[0066] According to Scheme 12, by utilizing the compression section to reduce part of the hook's function, the locking force of the locking member can be moderately suppressed, thereby suppressing damage to the member when peeling off the locking member. Furthermore, by locally weakening the locking force of the locking member, the locking member can be easily peeled off starting from the weakened portion.

[0067] (Scheme 13) The shorts-type sanitary napkin according to any one of Schemes 1 to 12, wherein,

[0068] The engaging member has an engaging portion with multiple hooks, and the overall outline of the engaging member is curved, located on the inner side of the engaging portion in the left-right direction.

[0069] According to Option 13, the shape of the locking component differs from that of the hook and loop fasteners on typical disposable diapers (which are generally rectangular), enhancing its design for everyday use. Furthermore, the locking component is designed to fit comfortably in the fingers for easy gripping, improving its operability.

[0070] (Solution 14) The shorts-type sanitary napkin according to any one of Solutions 1 to 13, wherein,

[0071] The engaging components are respectively disposed on both sides of the waist member in the left-right direction, and the shape of one side of the engaging component in the left-right direction is different from the shape of the other side of the engaging component in the left-right direction.

[0072] According to Scheme 14, users can easily recognize the method of installing the locking components on one side and the other side in different steps, which improves the ease of putting on and taking off sanitary napkins.

[0073] (Solution 15) A shorts-type sanitary napkin having intersecting vertical and horizontal directions, the shorts-type sanitary napkin comprising: an absorbent body having a liquid-absorbing core; a waist member having a front waist portion and a back waist portion; and a locking member, the outer end of the locking member in the horizontal direction being fixed to the waist member in a non-separable manner, the inner end of the locking member in the horizontal direction being detachably locked to the non-skin side of the front waist portion, the front waist portion and the back waist portion being joined together at their two ends in the horizontal direction by a pair of lateral joints, characterized in that the shorts-type sanitary napkin has a crotch elastic structure. The crotch elastic member is positioned on the non-skin side of the absorbent core and extends and retracts along the vertical direction. In the stretched state of the panty-type sanitary napkin, the locking member has a convex shape with only one part protruding from the outside to the inside in the central region of the three regions when the locking member is divided into three equal parts in the vertical direction. When viewed from the non-skin side, at least a portion of the color of the front waist part member is a colored part of the same color family as at least a portion of the color of the locking member, but with different shades. The lower end of the side edge of the outer end of the locking member is not located below the lower end of the side edge of the front waist part.

[0074] ===Implementation Methods===

[0075] The panty-shaped sanitary napkin according to an embodiment of the present invention will be described. In the following description, the panty-shaped sanitary napkin will also be simply referred to as a "sanitary napkin".

[0076] <<Basic Structure of Sanitary Napkins>>

[0077] Figure 1 This is a schematic perspective view of the sanitary napkin 1 according to this embodiment. Figure 2 This is a schematic top view of a sanitary napkin 1 in its unfolded and elongated state as observed in the thickness direction. Figure 3 yes Figure 2 A schematic diagram of the AA section.

[0078] The “stretched state” of sanitary napkin 1 refers to the state in which the sanitary napkin 1 as a whole (the whole product) is stretched to a wrinkle-free state by stretching the various elastic components of sanitary napkin 1 (e.g., the crotch elastic component 15, waist elastic component 26, etc., described later). Specifically, it means that the sanitary napkin 1 is stretched to the state in which the size of each component constituting sanitary napkin 1 (e.g., the non-skin side sheet 21, skin side sheets 22, 23, etc., described later) is the same as or close to the size of the individual component.

[0079] like Figure 1As shown, the sanitary napkin 1 has intersecting (orthogonal) "up-down", "left-right", and "back-forward" directions. Additionally, as... Figure 3 As shown, the sanitary napkin 1 has a "thickness direction" which is the direction in which the components are stacked. In the up-down direction, the side that becomes the wearer's waist side when the sanitary napkin 1 is worn is designated as the "upper side," and the side that becomes the wearer's crotch side is designated as the "lower side." In the front-back direction, the side that becomes the wearer's abdomen side when worn is designated as the "front side," and the side that becomes the wearer's back side is designated as the "back side." Furthermore, in the thickness direction, the side that contacts the wearer's skin when the sanitary napkin 1 is worn is designated as the "skin side," and the opposite side is designated as the "non-skin side."

[0080] In addition, sanitary napkin 1 Figure 2 The unfolded state shown has mutually orthogonal "vertical direction" and "left-right direction". The "vertical direction" is the direction along the vertical direction of the shorts-type sanitary napkin 1 and along the length direction of the absorbent body 10 described later.

[0081] The sanitary napkin 1 of this embodiment has: an absorbent body 10; a waist member 20, which is disposed overlapping the absorbent body 10 on the non-skin side of the absorbent body 10; and a locking member 30, which is respectively disposed on both sides of the waist member 20 in the left-right direction.

[0082] The absorbent body 10, viewed from above, is generally rectangular in shape. It comprises: an absorbent core 11 for absorbing menstrual blood and other excretory fluids; a permeable top sheet 12 (e.g., hydrophilic hot-air nonwoven fabric, spunbond nonwoven fabric, etc.) positioned closer to the skin than the absorbent core 11; and a bottom sheet 13 positioned closer to the non-skin than the absorbent core 11. The bottom sheet 13 includes a liquid-impermeable sheet 13a (e.g., a resin film) and a hydrophobic sheet 13b (e.g., a soft nonwoven fabric, etc.) positioned closer to the non-skin than the liquid-impermeable sheet 13a. However, the structure of the absorbent body 10 is not limited to the above structure. For example, an auxiliary sheet (not shown) may be provided between the top sheet 12 and the absorbent core 11 in the thickness direction, and the bottom sheet 13 may consist only of the liquid-impermeable sheet 13a.

[0083] The absorbent core 11 is a component that absorbs and retains liquids such as menstrual blood, and is formed from liquid-absorbing fibers such as pulp fibers incorporating highly absorbent polymers (SAP). In addition, the outer peripheral surface of the absorbent core 11 may also be covered by a liquid-permeable sheet component (core sheet) such as cotton paper or non-woven fabric.

[0084] Alternatively, leak-proof wall portions 14 may be provided on both sides of the absorbent body 10 in the left-right direction. The leak-proof wall portions 14 are formed, for example, by bending portions of the hydrophobic sheet 13b extending from the non-skin-permeable side of the liquid-impermeable sheet 13a at multiple points and providing them on both sides of the top sheet 12 in the left-right direction on the skin-permeable side. In the leak-proof wall portions 14, by installing leak-proof wall elastic members 14a (e.g., elastic bands) in an elongated state along the longitudinal direction, the leak-proof wall portions 14 can stand upright towards the wearer's skin, thereby intercepting excretory fluids (menstrual blood, etc.).

[0085] The waist component 20 (outer component) includes a front waist portion 20f, which contacts the abdomen of the wearer's body, and a back waist portion 20b, which contacts the back of the wearer's body. When the sanitary napkin 1 in its unfolded state is folded in half at the central position CL in the longitudinal direction, and the front waist portion 20f and the back waist portion 20b are joined together at their two ends in the left-right direction by a pair of side joints 40, it becomes a shorts-type sanitary napkin 1. In its unfolded and stretched state, the sanitary napkin 1 ( Figure 2 In this context, the portion of the waist member 20 that overlaps with the lateral joint 40 in the longitudinal direction is designated as the front waist part 20f and the rear waist part 20b. Figure 1 The shown shorts-type sanitary napkin 1 has a waist opening 1a and a pair of leg openings 1b. Known joining methods such as sealing welding can be used for the side joints 40.

[0086] In this embodiment, the waist member 20 (external member) is a continuous member from the front waist section 20f to the rear waist section 20b. For example... Figure 3 As shown, the portion of the waist member 20 that is forward of the central position CL in the longitudinal direction is also referred to as the front portion 20F of the waist member 20, and the portion of the waist member 20 that is backward of the central position CL is also referred to as the rear portion 20B of the waist member 20.

[0087] Additionally, the waist member 20 includes: a non-skin side panel 21; skin side panels 22 and 23 located closer to the skin than the non-skin side panel 21; and multiple waist elastic members 26. The non-skin side panel 21 and the skin side panels 22 and 23 are soft, non-stretchable sheet members (e.g., spunbond nonwoven fabric, SMS nonwoven fabric, etc.). In this embodiment, the non-skin side panel 21 is continuous in the longitudinal direction (vertical direction) from the upper end of the front waist member 20 to the upper end of the rear waist member 20, and has a shape that narrows inward in the left-right direction from the center in the longitudinal direction. Alternatively, it can be as follows... Figure 3As shown, the ends of the non-skin side panel 21 in the vertical direction are folded back to form a folded portion 21F. On the other hand, the front skin side panel 22 and the rear skin side panel 23 are discontinuous in the longitudinal direction and are made of separate sheets. However, the structure of the waist member 20 is not limited to the above structure. For example, similar to the non-skin side panel 21, the skin side panel may be a continuous sheet in the longitudinal direction, and the front skin side panel 22 and the rear skin side panel 23 may be an integral sheet. Alternatively, the front waist portion 20f and the rear waist portion 20b may be separated in the longitudinal direction, and the non-skin side of the absorbent body 10 may be exposed to the outside at the crotch area.

[0088] Multiple waist-body elastic members 26 are linear or strip-shaped elastic members (e.g., elastic cords, elastic bands) arranged at intervals along the vertical direction and stretching in the horizontal direction within the waist-body member 20. Figure 3 As shown, multiple waist elastic members 26 are installed between the non-skin side panel 21 and the skin side panels 22 and 23 in a state of extension in the left and right direction. Utilizing the left and right stretchability exhibited by the waist elastic members 26, the waist member 20 conforms to the wearer's waist. The waist elastic member 26 can also be a stretchable sheet material (e.g., a stretchable membrane).

[0089] The engaging member 30 (so-called wing) has a base plate 31 and an engaging portion 32 having multiple hooks 321 for engaging with the waist member 20. Furthermore, the outer end of the engaging member 30 in the left-right direction is fixed to the waist member 20 in a non-separable manner, while the inner end engages with the non-skin side of the waist member 20 in a detachable manner. Figure 1 As shown, the engaging member 30 of this embodiment is provided on the front waist part 20f side and engages with the non-skin side of the front waist part 20f in a detachable manner.

[0090] The substrate sheet 31 is a sheet component made of non-woven fabric or the like. The support and engaging portion 32 is a roughly semi-elliptical shape, with its length in the vertical direction shortening towards the inner side in the horizontal direction of the sanitary napkin 1. Furthermore, the outer ends of the substrate sheet 31 in the horizontal direction are fixed to the waist member 20 in a non-separable manner using the side joint portion 40. However, it is not limited to the above structure; the substrate sheet 31 may also be fixed to the waist member 20 in a non-separable manner at a location other than the side joint portion 40 (for example, a location in the horizontal direction that is further inward than the side joint portion 40 and further outward than the separating portion 50 described later).

[0091] The engaging portion 32 is provided on the inner end of the skin-side surface of the substrate sheet 31 in the left-right direction. As the engaging portion 32, a nylon hook-and-loop fastener with multiple hooks 321 made of polypropylene or the like for engaging can be exemplified. The engaging member 30 engages with the non-skin-side surface of the waist member 20 in a detachable manner using the engaging portion 32.

[0092] <<On the Functionality and Design of Sanitary Napkins>>

[0093] Figure 4A and Figure 4B This diagram illustrates the action of separating the waist component 20 of the sanitary napkin 1 from the front to the back. Figure 4A This is a cross-sectional schematic diagram showing the state of the sanitary napkin 1 in its shorts-like shape as viewed from the top side (the side with the waist opening 1a) in the vertical direction. Figure 4B This is a cross-sectional schematic diagram showing the state after the waist component 20 is separated front and back. Figure 5 This is a general front view of a sanitary napkin 1 in its natural state. Figure 6 This is an explanatory diagram of the color of the sanitary napkin 1 when viewed from the non-skin side in its unfolded and stretched state, and a schematic top view of the sanitary napkin 1 when viewed from the non-skin side in its unfolded and stretched state. Figure 7 This is an explanatory diagram of the shape of the engaging member 30.

[0094] The sanitary napkin 1 of this embodiment has a locking member 30. The locking members 30 are respectively provided on both sides of the waist member 20 in the left-right direction. Therefore, as... Figure 4B As shown, the engaging portion 32 of the engaging member 30 can engage with the non-skin side of the front waist portion 20f of the waist member 20 that is separated from the front and back, opposite to the side where the engaging member 30 is fixed (side of the side joint portion 40). Thus, the engaging member 30 can be mounted on the waist member 20 that is separated from the front and back, thereby making the waist member 20 ring-shaped again.

[0095] Additionally, the waist member 20 has a separation portion 50 (so-called easy-tear line) for separating the annular waist member 20. For example... Figure 2 and Figure 4A As shown, in the sanitary napkin 1 of this embodiment, the separating portions 50 are respectively provided on both sides of the front waist portion 20f in the left-right direction. In the natural state of the sanitary napkin 1, it is preferable that at least a portion of the separating portions 50 is provided at a position overlapping with the engaging member 30. Separating portions 50 (refer to the description below) Figure 12 It has multiple notches 51 and multiple non-notches 52 arranged alternately in the vertical direction. In the separation section 50, the notches 51 are used to reduce the strength of the front waist section 20f, thereby making it easier to tear the front waist section 20f in the vertical direction.

[0096] Therefore, the user (e.g., the wearer of sanitary napkin 1) can wear sanitary napkin 1 with the front waist section 20f torn open along either the left or right side of the separation section 50. For example, after tearing open one side of the separation section 50 in the left or right direction, one leg is passed through the leg opening 1b on the other side (the side without the separation section 50 torn). Then, the sanitary napkin 1 is pulled up, and the waist member 20 is wrapped around the wearer's waist, while the locking member 30 on one side of the left or right direction is locked with the front waist section 20f, thus completing the wearing of sanitary napkin 1. In this case, since only one leg needs to be passed through the leg opening 1b, the ease of wearing sanitary napkin 1 is improved. In addition, by adjusting the locking position of the locking member 30, the fit and wearing comfort of sanitary napkin 1 relative to the wearer are improved.

[0097] Furthermore, the user can also wear the sanitary napkin 1 with the front waist section 20f torn open along the two sides of the separation section 50 in the left-right direction. For example, by tearing open one side of the separation section 50 in the left-right direction, the broken part of the waist member 20 is wrapped around the thigh, and the locking member 30 on one side of the left-right direction is locked with the front waist section 20f. This results in the wearer's leg passing through the leg opening 1b on one side of the left-right direction. Next, the separation section 50 on the other side of the left-right direction is torn open. Then, the sanitary napkin 1 is pulled up, and the waist member 20 is wrapped around the wearer's waist, while the locking member 30 on the other side of the left-right direction is locked with the front waist section 20f, thus completing the wearing of the sanitary napkin 1. By providing a pair of locking members 30 on both sides of the waist member 20 in the left-right direction, the sanitary napkin 1 can be worn even without the leg passing through the leg opening 1b from the waist opening 1a of the sanitary napkin 1. Therefore, even without removing pants, shoes, stockings, etc., the wearer can wear sanitary napkin 1 and easily change it, even when out and about. However, the method of wearing sanitary napkin 1 is not limited to the above methods. For example, the user can also wear it in its initial state as a shorts type ( Figure 1 Wearing a sanitary napkin directly 1.

[0098] Furthermore, whether wearing the sanitary napkin 1 directly as a pair of shorts or by tearing open the waistband 20 on one or both sides, it is best to separate the waistband 20 at the left and right separation portions 50 after using the sanitary napkin 1. That is, when wearing it directly as a pair of shorts, tear open the left and right separation portions 50. When wearing it by tearing open the waistband 20, detach the locking member 30 (locking portion 32) from the waistband 20. With this arrangement, the sanitary napkin 1, which becomes a belt, can be pulled out from between the thighs, making it easy to remove.

[0099] However, it is not limited to the above structure. For example, the engaging member 30 may only be provided on one side of the waist member 20 in the left-right direction. In addition, the waist member 20 may not have a separating part 50.

[0100] In addition, such as Figure 2 and Figure 3 As shown, the sanitary napkin 1 has a "crotch elastic member 15" which is positioned on the non-skin side of the absorbent core 11 and stretches in the vertical direction (longitudinal direction). At least a portion of the crotch elastic member 15 is located in the area that abuts against the wearer's crotch during wear of the sanitary napkin 1 (e.g., the area from the lower end of the front side joint 40 to the lower end of the rear side joint 40). In this embodiment, the crotch elastic member 15 is composed of elastic bands, and five crotch elastic members 15 are spaced apart in the left-right direction between the liquid-impermeable sheet 13a and the hydrophobic sheet 13b, elongated in the longitudinal direction. However, the arrangement position and number of crotch elastic members 15 in the thickness and planar directions can be appropriately adjusted. Alternatively, the crotch elastic member 15 can also be a stretchable sheet such as a stretchable membrane or stretchable nonwoven fabric.

[0101] Utilizing the elasticity of the crotch elastic member 15, the absorbent core 11 is lifted towards the skin, making it easy to deform into a convex shape facing the skin. Therefore, the absorbent core 11 easily fits snugly against the wearer's crotch area, thus preventing leakage of excretory fluids (menstrual blood, etc.) down the wearer's skin.

[0102] Preferably, the elongation ratio of the crotch elastic member 15 is approximately 1.4 to 3.3 times. The elongation ratio is expressed as the value obtained by dividing the length of the elastic member in its elongated state by the length of the elastic member in its natural state. By setting the elongation ratio of the crotch elastic member 15 to a relatively strong ratio as described above, the absorbent core 11 with relatively high stiffness can be caused to contract from the non-skin side in the thickness direction and lift towards the skin side.

[0103] In addition, such as Figure 7 As shown, in the stretched state of the sanitary napkin 1, the engaging member 30 has a convex shape in the central region r2 of the three regions r1~r3 when the engaging member 30 is divided into three equal parts in the vertical direction. This convex shape is characterized by a single portion protruding in a curved shape from the outer side to the inner side in the left-right direction. In other words, in the central region r2, the length of the engaging member 30 in the vertical direction gradually narrows from the outer side to the inner side in the left-right direction, and its outline (the portion at points p1~p2) is approximately parabolic. Furthermore, the outline of the engaging member 30 in the central region r2 does not have a straight portion; it consists only of curved portions.

[0104] The central portion of the engaging member 30 is a semi-elliptical shape, as described above, making it easy for the user to identify the position where they should grip the engaging member 30. Furthermore, if the engaging member were a rectangular or trapezoidal shape with a straight section, the parts of the engaging member on either side of the user's gripping position in the vertical direction would easily bend, potentially dispersing the user's pulling force. In contrast, by having the shape described above, the area of ​​the engaging member on either side of the user's gripping position in the vertical direction is reduced, suppressing force dispersion and efficiently transmitting pulling force to the left and right sides (side joint 40, rear waist 20b). Additionally, compared to a case where the central portion of the engaging member is a pointed shape with a straight section, making the central portion of the engaging member 30 curved makes it easier to grip, aligning with the fingers. Therefore, the operability of the engaging member 30 is improved.

[0105] As described above, in the sanitary napkin 1, the snap fastener 30 facilitates the putting on and taking off of the sanitary napkin 1, the crotch elastic member 15 prevents leakage of excrement, and the shape of the snap fastener 30 improves its operability and functionality.

[0106] Furthermore, the locking member 30 in this embodiment has a curved convex shape, unlike the generally rectangular shape commonly used in hook and loop fasteners, such as those found in disposable diapers. Therefore, even with the locking member 30, the appearance of the sanitary napkin 1, resembling a disposable diaper, is reduced. In other words, the sanitary napkin 1 resembles the appearance of underwear worn by the user outside of menstruation, enhancing its design for everyday use. Consequently, the user's resistance to using the sanitary napkin 1 is reduced, and menstruation is easier to manage as usual.

[0107] In addition, in its natural state before use ( Figure 5 In the sanitary napkin 1, the lower end of the elastic member 15 is curved and convex, with its outline protruding upwards, similar to the outline of the locking member 30. Therefore, the user can easily focus on the elastic member 15, giving the user the impression that the sanitary napkin 1 fits snugly against the crotch.

[0108] Preferably, such as Figure 7 As shown, in the position inside the left-right direction of the engaging part 32, it is preferable that the overall outline of the engaging member 30 (the outline portion up to position p3~p4) is curved and does not have a straight portion.

[0109] This design makes the shape of the latching member 30 different from the shape of the hook and loop fasteners (which are generally rectangular) of a typical disposable diaper. Therefore, the sanitary napkin 1 has a less diaper-like appearance, improving its design and integration into daily life. Furthermore, the latching member 30 is easy to grip and maneuver, conforming to the fingers. Additionally, the latching member 30 is less prone to bending, improving the appearance of the sanitary napkin 1 and giving the impression of a high-quality product.

[0110] Moreover, such as Figure 6 As shown, when the sanitary napkin 1 is stretched out and viewed from the non-skin side (outer side of the sanitary napkin 1), the color of the components of the front waist section 20f and the color of the locking component 30 are both colored within the same color family, but with different shades. For example, the color of both the components of the front waist section 20f and the color of the locking component 30 is light pink, but with different shades of light pink. Furthermore, "colored" refers to any color other than colorless transparent and white.

[0111] When viewed from the outside, the front waistband 20f and the locking member 30 are colored in the same color family, thus suppressing the conspicuousness of the locking member 30. Therefore, the sanitary napkin 1 reduces its appearance from that of a disposable diaper. Furthermore, because it has a color that differs from the white commonly used in disposable diapers, the sanitary napkin 1 also reduces its diaper-like appearance, enhancing its design for everyday use. However, the color of the front waistband 20f differs from the color of the locking member, allowing the user to identify the locking member 30. Therefore, the user can use the locking member 30 as needed, maximizing the ease of wearing the sanitary napkin 1.

[0112] In the sanitary napkin 1 of this embodiment, the non-skin side sheet 21, the front skin side sheet 22, the back skin side sheet 23, and the base sheet 31 of the snap fastener 30 are all made of a sheet material that is colored in the same color family (e.g., light pink). Therefore, the color of the entire area of ​​the front waist portion 20f and the entire area of ​​the snap fastener 30 are colored in the same color family, but with different shades. This further reduces the appearance of the sanitary napkin 1, making it resemble a disposable diaper.

[0113] However, the structure is not limited to the above. It is permissible as long as at least a portion of the color of the component of the front waist body 20f is a colored element of the same color family as at least a portion of the color of the engaging component 30, but with a different shade. For example, it is also possible that a portion of the component of the front waist body 20f is not colored, or is not of the same color family as the engaging component 30, or is of the same color family as the engaging component 30 but with the same shade. Conversely, it is also possible that a portion of the engaging component 30 is not colored, or is not of the same color family as the component of the front waist body 20f, or is of the same color family as the component of the front waist body 20f but with the same shade. Furthermore, the non-skin side panel 21 and the skin side panels 22 and 23 are not limited to being colored; only one of them may be colored.

[0114] In addition, in this embodiment, the sanitary napkin 1 is in an extended state ( Figure 6 When viewed from the non-skin side, the color of the components of the front waist section 20f and the back waist section 20b are in the same color family. The shades can be the same or different. Therefore, in the sanitary napkin 1, the area of ​​the same color family is enlarged, further reducing the appearance resembling a disposable diaper. However, the color of the components of the back waist section 20 can also be white, or it can be a color different from that of the components of the front waist section 20b.

[0115] Furthermore, in the sanitary napkin 1 of this embodiment, the waist member 20 (outer member) is continuous in the longitudinal direction (vertical direction) from the front waist portion 20f to the rear waist portion 20b. Therefore, a colored waist member 20 (here, the non-skin side piece 21) of the same color is present in the crotch portion below the side joint portion 40. Thus, in the stretched state of the sanitary napkin 1 ( Figure 6 When viewed from the non-skin side, the color of the crotch area also becomes a colored part of the same color family as the front waist part 20f and the back waist part 20b. Therefore, the sanitary napkin 1 as a whole becomes a colored part of the same color family, further reducing the appearance of being like a disposable diaper.

[0116] There are no particular limitations on the coloring method for the sheet material. For example, methods such as incorporating coloring agents (pigments, dyes, etc.) into the constituent components of the raw material (non-woven fabric fibers, etc.) can be listed, as can printing and immersing the raw material in a dyeing solution. There are also no particular limitations on the methods for different shades of color. For example, methods such as different types of sheets (non-woven fabrics), different thicknesses, different weights per unit area, different shades of color during coloring, or different numbers of sheets can be listed.

[0117] Furthermore, the color of the front waist section 20f refers to the color of the front waist section 20f as a single unit, observed from a non-skin side when the front waist section 20f is not overlapping with other units (e.g., absorbent body 10, rear waist section 20b, and locking member 30). Similarly, the color of the locking member 30 is also the color of the locking member 30 as a single unit, observed from a non-skin side when the locking member 30 is not overlapping with other units (e.g., waist section 20). Additionally, the color of the rear waist section 20b is also the color of the rear waist section 20b as a single unit, observed from a non-skin side when the rear waist section 20b is not overlapping with other units.

[0118] "Colored" is defined as any color other than colorless transparent and white (e.g., light pink, purple, light blue, etc.). White, for example, refers to the color represented as "N9.5" in the Munsell color system and "255, 255, 255" in the RGB color space (so-called pure white). Preferably, the colored color is one with a color difference of 12 or more from the pure white, but the color difference can also be less than 12. The color difference can be measured using a general-purpose colorimeter (e.g., the Konica Minolta CR-5 colorimeter, or a colorimeter equivalent to the CR-5 (measuring diameter: Φ3mm)). The light source for the measuring instrument can be a C light source (the standard of the International Commission on Illumination (CIE)). The color difference is the color difference relative to a white reference plate (as defined by L according to CIE 1976). ＊ a ＊ b ＊ The color difference ΔE is calculated using the color difference formula within the color space. It can be calculated by separately measuring the L, a, b values ​​of the white reference plate and the L, a, b values ​​of the object sample. The white reference plate is set to Lab0 (X93.19, Y95.20, Z112.28). Here, L represents the luminance value, and a and b are the chromaticity coordinates. If the L, a, b values ​​of the white reference plate are set to L0, a0, b0, and the L, a, b values ​​of the object sample are set to L1, a1, b1, then the color difference can be calculated using ΔL = L0 - L1, Δa = a0 - a1, and Δb = b0 - b1.

[0119] Furthermore, the determination that the color of the front waist body 20f component is "in the same color family" as the color of the locking component 30 can be made using, for example, a Munsell color wheel divided into 20 hues. Multiple testers (e.g., 10 people) visually identify the two samples (front waist body 20f and locking component 30) and determine which hue of the Munsell color wheel each sample corresponds to, that is, determine which hue each sample is closest to. Additionally, an article with the front waist body 20f unit in its extended state, placed on a white reference plate with the non-skin side facing upwards, is used as a sample, and testers judge its color. Preferably, when multiple waist elastic components 26 are arranged at intervals, it is preferable for testers to judge the color of the portion without waist elastic components 26. When the front waist body 20f is entirely composed of sheet-like waist elastic components, the color of the portion with waist elastic components can also be judged. Similarly, an article with the locking component 30 unit in its extended state, placed on a white reference plate with the non-skin side facing upwards, is used as a sample. Then, the hue chosen by the most people is taken as the hue of the sample. If the hue of the front waist part 20f is the same hue as or adjacent to the hue of the engaging member 30, it is set to the same color family.

[0120] Furthermore, the judgment of whether the color of the front waistband 20f component and the color of the locking component 30 are "different in shade" can be made, for example, by whether a person can visually perceive the difference in color shade. If multiple testers (e.g., 10 people) can visually identify the difference in color shade between the two samples (as described above) and can visually perceive the difference, then it is defined as different in shade. Alternatively, since the front waistband 20f and the locking component 30 are in the same color family, if the brightness (L value) of the color of the front waistband 20f component and the color of the locking component 30 are different, then it is defined as different in shade. In cases of higher brightness and a brighter appearance, it is defined as a lighter color; in cases of lower brightness and a darker appearance, it is defined as a darker color.

[0121] Luminance (L value) can be measured using a general-purpose colorimeter (e.g., the Konica Minolta CR-5 colorimeter, or a colorimeter equivalent to the CR-5 (measuring diameter: Φ3mm)). A C-light source (the standard of the International Commission on Illumination (CIE)) can be used as the light source. As described above, an article with the front waist section 20f unit in its extended state, placed on a white reference plate with the non-skin side facing upwards, is used as a sample, and luminance is measured. Preferably, when multiple waist elastic members 26 are arranged at intervals, it is preferable to measure the portion without waist elastic members 26. When the front waist section 20f is entirely composed of sheet-like waist elastic members, the portion with waist elastic members can also be measured. Similarly, an article with the locking member 30 unit in its extended state, placed on a white reference plate with the non-skin side facing upwards, is used as a sample, and luminance is measured. For each sample, the luminance is measured at three or more points by changing the measurement location, and the average luminance is calculated. If the difference between the average brightness of the component in the front waist body 20f and the average brightness of the engaging component 30 is 1 or more, it is set as different depths.

[0122] Preferably, when the sanitary napkin 1 is stretched, the color of the locking member 30 (i.e., the color of the portion of the locking member 30 that is the same color family as the front waist portion 20f) is darker than the color of the components of the front waist portion 20f (i.e., the color of the portion of the front waist portion 20f that is the same color family as the locking member 30) when viewed from the non-skin side. In other words, it is preferable that the brightness of the locking member 30 is lower than that of the front waist portion 20f, appearing as a darker color even though they are in the same color family. This makes the locking member 30 easily identifiable by the user. Therefore, the user can use the locking member 30 as needed, maximizing the ease of wearing the sanitary napkin 1. The method for determining the depth of color can be performed using the method described above.

[0123] In addition, such as Figure 6 As shown, in the stretched state of the sanitary napkin 1, the area where the front waist portion 20f overlaps with the uppermost region R1 of the four regions R1~R4 (which divide the side joining portion 40 into four equal parts in the vertical direction) is designated as the uppermost region R1'. The area where the front waist portion 20f overlaps with the third region R3 from the top in the vertical direction is designated as the middle region R3'. Preferably, when viewed from the non-skin side, the color of the uppermost region R1' (i.e., the color of the portion of the uppermost region R1' that is the same color as the engaging member 30) is darker than the color of the middle region R3' (i.e., the color of the portion of the middle region R3' that is the same color as the engaging member 30). In other words, it is preferable that the brightness of the uppermost region R1' is lower than that of the middle region R3', and that it is the same color but a darker color.

[0124] In the sanitary napkin 1 of this embodiment, as follows: Figure 3 As shown, the upper end of the colored non-skin side sheet 21 is folded back to form a folded portion 21F. Therefore, the number of layers of colored sheets (21, 22) in the middle region R3' is two, while the number of colored sheets (21, 22, 21F) in the upper end region R1' is three. Therefore, the color of the upper end region R1' is darker.

[0125] In typical underwear (shorts), rubber is provided at the top, or the fabric is folded back to hold the rubber in place. In most cases, the top and other parts of the underwear have different shades of color. Therefore, based on the above, the sanitary napkin 1 has an appearance similar to that of typical underwear, enhancing its design for everyday use. Furthermore, the method for determining the shade can be performed using the aforementioned method. Additionally, in the top region R1' and the middle region R3', the colors of the parts that do not overlap with other components (such as the absorbent body 10) are compared.

[0126] In addition, such as Figure 6 As shown, the absorbent body 10 has a backing sheet 13 with a pattern 60 that is visually recognizable from the non-skin side (outer side) of the sanitary napkin 1. In this embodiment, the pattern 60 is formed by printing on the liquid-impermeable sheet 13a, but the pattern can also be printed on the hydrophobic sheet 13b. In this case, it is preferable that, when the sanitary napkin 1 is stretched, at least a portion of the color of the pattern 60 on the backing sheet 13 is a colored color of the same color family as the color of the front waist part 20f, but with a different shade. Furthermore, the color of the pattern 60 is the color observed from the non-skin side of the sanitary napkin 1 (i.e., the color visually recognizable through the waist part 20). In addition, the method for determining the color family and the shade can be performed using the methods described above.

[0127] Based on the above, since the front waist part 20f and part of the pattern 60 are in the same color family, the pattern will not be too eye-catching, achieving a sense of design unity. At the same time, because the color of the pattern 60 varies in shade, it allows users to identify the pattern 60. Furthermore, the appearance of the sanitary napkin 1 differs from that of disposable baby diapers, which often feature prominent patterns, enhancing its design's integration into daily life.

[0128] In addition, although Figure 6 The illustration shows a pattern 60 representing a ribbon or graphic, but the type, quantity, size, and arrangement of the pattern 60 are not particularly limited. Preferably, the pattern 60, which is the same color as the front waist part 20f but in a different shade, is preferably placed on the front part 20F of the waist member 20 (the part further forward than the central position CL in the longitudinal direction). With this arrangement, when the sanitary napkin 1 is in the panty-style state, the front waist part 20f and the pattern 60 of the same color can be visually distinguished together.

[0129] Figure 8 This diagram shows the state where the engaging member 30 is opened, exposing the engaging portion 32. Preferably, in the stretched state of the sanitary napkin 1, as... Figure 8 The average brightness (L value) of the color of the engaging portion 32 as seen from the surface side (skin side side of the engaging member 30) is shown, for example... Figure 6 The average brightness of the components of the front waist section 20f, the average brightness of the snap fastener 30, and the average brightness of the pattern 60 on the backing film 13, as viewed from the non-skin side of the sanitary napkin 1, are high. In the sanitary napkin 1 of this embodiment, the colors of the components of the front waist section 20f, the snap fastener 30, and the pattern 60, as viewed from the non-skin side, are colored. In contrast, the snap fastener 32 is white, therefore the average brightness of the snap fastener 32 is higher. The brightness (L value) can be measured using the method described above.

[0130] Therefore, when the engaging member 30 is opened, the brighter engaging part 32 is conspicuous and easily recognizable by the user. Thus, the user can reliably engage the engaging member 30 with the front waist part 20f while being aware of the position of the engaging part 32.

[0131] However, it is not limited to the above structure. Alternatively, the color of the engaging portion 32 viewed from the surface side may be the same color family as the color of the front waist part 20f and the engaging member 30 viewed from the non-skin side, but with different shades. In this case, the engaging portion 32 is less conspicuous from the non-skin side of the sanitary napkin 1, reducing the appearance of the sanitary napkin 1 like a disposable diaper and improving its design for everyday use.

[0132] Figure 9 These are explanatory diagrams of the engaging parts 33 and 34 of the engaging member 30. Figure 10 This is a cross-sectional schematic diagram of the engaging member 30. (Example) Figure 10As shown, the substrate sheet 31 in this embodiment is formed by stacking and bonding two sheet members, a first substrate sheet 311 and a second substrate sheet 312, in the thickness direction. The first substrate sheet 311 is a sheet member arranged opposite to the waist member 20 (and the engaging portion 32) in the thickness direction, and can be, for example, spunbond nonwoven fabric or SMS nonwoven fabric. The first substrate sheet 311 has a plurality of first substrate sheet compression portions 71 on both sides in the thickness direction. The first substrate sheet compression portions 71 are formed by performing compression processing such as embossing on the first substrate sheet 311 from both sides in the thickness direction, and are distributed throughout the first substrate sheet 311. The spunbond layer and the meltblown layer constituting the first substrate sheet 311 (SMS nonwoven fabric) are bonded to each other by the first substrate sheet compression portions 71. The first substrate sheet compression portions 71 are compression portions formed during the manufacturing process of the first substrate sheet 311 (SMS nonwoven fabric).

[0133] The second substrate sheet 312 is a sheet member laminated on the non-skin side of the first substrate sheet 311 in the thickness direction, and can be, for example, made of spunbond nonwoven fabric. The second substrate sheet 312 has a plurality of second substrate sheet compression portions 72 on at least one side in the thickness direction. The second substrate sheet compression portions 72 are formed by performing a compression process such as embossing on the second substrate sheet 312 in the thickness direction, and are distributed throughout the second substrate sheet 312. The second substrate sheet compression portions 72 are compression portions formed during the manufacturing process of the second substrate sheet 312 (spunbond nonwoven fabric). Furthermore, in the sanitary napkin 1, the second substrate sheet compression portions 72 are visually identifiable from the non-skin side of the engaging member 30, and are portions formed by compression at least from the non-skin side of the second substrate sheet 312.

[0134] In this way, the base plate 31 of the engaging member 30 is composed of at least two layers of sheet material (the first base plate 311 and the second base plate 312), thereby increasing the rigidity of the engaging member 30. This can suppress the engagement member 30 from breaking during assembly and disassembly.

[0135] In addition, such as Figure 9 As shown, the engaging member 30 has engaging patterns 33 and 34 that are visually recognizable from the non-skin side of the sanitary napkin 1. The engaging pattern 33 in the region Ri of the engaging member 30, which is more inward in the left-right direction than the engaging portion 32, is also referred to as the "top side pattern 33". The engaging pattern 34 in the region Ro of the engaging member 30, which is more outward in the left-right direction than the engaging portion 32, is also referred to as the "root side pattern 34". The root side pattern 34 is the compression portion 72 of the second substrate sheet. In this embodiment, the root side pattern 34 is a small circular pattern, and a plurality of root side patterns 34 are distributed (alternated) in the region Ro.

[0136] The top side pattern 33 is a combination of the second substrate sheet compression portion 72 and the top side compression portion 73. (As shown...) Figure 10 As shown, the top-side compression portion 73 is a portion formed by compressing the substrate sheet 31 (first substrate sheet 311 and second substrate sheet 312) from both sides in the thickness direction. The top-side compression portion 73 is a honeycomb pattern shape formed by arranging regular hexagons without gaps. However, the shape of the top-side compression portion 73 is not limited to the above shape. In addition, the top-side compression portion 73 can be any compression portion formed by compressing the substrate sheet 31 from at least the non-skin side in the thickness direction in a way that can be visually recognized from the non-skin side of the engaging member 30. In addition, the top-side compression portion 73 may also be formed to a portion that overlaps with the engaging portion 32 in the thickness direction.

[0137] Preferably, the top side pattern 33 (the combination of the second substrate sheet compression portion 72 and the top side compression portion 73) in the region Ri, which is closer to the inside of the engaging portion 32, is different from the root side pattern 34 (the second substrate sheet compression portion 72) in the region Ro, which is closer to the outside of the engaging portion 32. This improves the design flexibility of the engaging member 30. Furthermore, the top portion of the engaging member 30 is distinguished from other regions, making it easier for the user to identify the position where they can grasp the engaging member 30. Additionally, the top side pattern 33, formed from the top side compression portion 73, enhances the integration and rigidity of the first substrate sheet 311 and the second substrate sheet 312. This increased rigidity of the portion grasped by the user makes the engaging member 30 less prone to breakage, and facilitates the transmission of pulling force to the left and right sides (rear waist portion 20b). However, the structure is not limited to the above; the top side pattern 33 can also be formed by printing or the like.

[0138] Furthermore, both the top side pattern 33 and the root side pattern 34 are formed by compression portions created by compressing the substrate sheet 31 in the thickness direction of the engaging member 30. In this case, as... Figure 10 As shown, the maximum depth of the compression portion (the second substrate sheet compression portion 72 and the top-side compression portion 73) in the top-side pattern 33 (the maximum depth of the compression portion from the non-skin side of the substrate sheet 31 towards the skin side) is set to h1. Furthermore, the maximum depth of the compression portion (the second substrate sheet compression portion 72) in the root-side pattern 34 is set to h2. In this case, the maximum depth h1 of the top-side pattern 33 is preferably deeper than the maximum depth h2 of the root-side pattern 34 (h1 > h2).

[0139] Therefore, the top side pattern 33 (a honeycomb pattern formed by the top side compression portion 73) is prominent and easily recognizable by the user, making it easy to identify the position for grasping the engaging member 30. Furthermore, the top of the engaging member 30 is easily bent from the top side compression portion 73. Thus, the engaging member 30 is easy to grasp by the fingers, improving its operability.

[0140] In addition, the top compression portion 73 of the honeycomb pattern has a portion that is inclined in both the vertical and horizontal directions relative to the sanitary napkin 1. Therefore, regardless of the position of the user's gripping member 30 or the direction in which the user pulls the gripping member 30, the top portion of the gripping member 30 is easy to bend from the top compression portion 73, making it easy to grip with the fingers.

[0141] In addition, such as Figure 10 As shown, the engaging portion 32 is bonded to the substrate sheet 31 by adhesive HMA, and is fused together at the engaging portion compression portion 74 (compression portion). The engaging portion 32 (a nylon hook and loop fastener with hooks 321) is bonded to the skin side of the substrate sheet 31 using adhesive HMA. Moreover, in the engaging portion compression portion 74, the engaging portion 32 and the substrate sheet 31 are fused together by being heated and compressed in the thickness direction. Specifically, the engaging portion compression portion 74 is provided in an area that at least overlaps with the engaging portion 32 when viewed in the thickness direction, fusing the engaging portion 32 and the substrate sheet 31 from the skin side toward the non-skin side. Figure 8 In the middle, a diagonal grid-shaped locking compression part 74 is provided in the area that overlaps with the locking part 32 in the left and right directions and in the areas on both sides thereof.

[0142] As a result, the integration of the engaging portion 32 and the base plate 31 is improved. Therefore, it is possible to prevent the engaging portion 32 from separating from the base plate 31 and remaining on the front waist section 20 when the engaging member 30 is peeled off, allowing for repeated assembly and disassembly of the engaging member 30. Furthermore, when the engaging member 30 is opened, the diagonally patterned engaging compression portion 74 is clearly visible, making it easy for the user to identify the engaging portion 32. Therefore, the user can reliably engage the engaging member 30 with the front waist section 20f while being aware of the position of the engaging portion 32.

[0143] Preferably, when viewed in the thickness direction of the engaging member 30, a portion of the plurality of hooks 321 of the engaging portion 32 preferably overlaps with the engaging compression portion 74. With this arrangement, as... Figure 10 As shown, the hook 321 overlapping with the compression portion 74 is flattened or its height is reduced, thus diminishing its function as a hook. The constituent fibers of the front waist portion 20f are less likely to hook onto such hooks 321. Therefore, in the compression portion 74, the engagement force between the front waist portion 20f and the engagement portion 32 is reduced compared to other areas of the engagement portion 32.

[0144] By moderately suppressing the engaging force of the engaging member 30 (engaging portion 32), it is possible to prevent the engaging portion 32 from remaining on the front waist portion 20f or the engaging member 30 and the front waist portion 20f from being damaged when the engaging member 30 is peeled off. Therefore, the engaging member 30 can be repeatedly assembled and disassembled. Furthermore, by locally weakening the engaging force of the engaging portion 32, the engaging member 30 can be easily peeled off starting from the part with the weaker engaging force, improving the operability of assembling and disassembling the engaging member 30.

[0145] Furthermore, the engaging portion 32 of the sanitary napkin 1 in this embodiment is continuous in the vertical direction from the upper end to the lower end of the engaging member 30. Therefore, even if the hook 321 is partially flattened by the engaging portion compression portion 74 as described above, the engaging force of the engaging member 30 can be maintained due to the large area of ​​the engaging portion 32. Thus, the peeling of the engaging member 30 during the wearing of the sanitary napkin 1 can be suppressed. In addition, the upper and lower ends of the engaging member 30 engage with the front waist portion 20f, and the rigidity of the upper and lower ends of the engaging member 30 is increased. Thus, the rolling of the upper and lower ends of the engaging member 30 can be suppressed, the appearance of the sanitary napkin 1 before and during use is improved, and it can give the user the impression that the sanitary napkin 1 is a high-quality product.

[0146] Figure 11 This diagram shows an example of a modified version of the locking member 30, and is a schematic top view of the front portion of the sanitary napkin 1 in its extended state. In the sanitary napkin 1 of this embodiment, the locking members 30 are respectively provided on both sides of the waist member 20 in the left-right direction. Therefore, as described above, the following wearing method can be implemented: tear open the front waist portion 20f on one side in the left-right direction, so that the locking member 30 is engaged, and the wearer's leg is passed through the leg opening 1b of the sanitary napkin 1; then tear open the front waist portion 20f on the opposite side and engage the locking member 30 to wear the napkin. This wearing method is different from the usual wearing method of a band-type disposable diaper (the method of wearing it by opening the hook and loop fasteners on both sides in the left-right direction).

[0147] Therefore, the shape of the engaging member 30 on one side in the left-right direction can also be different from the shape of the engaging member 30 on the other side. For example, in Figure 11 In this case, the lateral length La of the locking member 30a on one side is shorter than the lateral length Lb of the locking member 30b on the other side. It was observed that users of the two locking members 30a and 30b with different shapes can easily recognize the above-described method of installing the locking member 30a on one side and the locking member 30b on the other side using different steps. Therefore, the ease of putting on and taking off the sanitary napkin 1 is improved.

[0148] <Regarding the structure of the separating section 50 (tear line)>

[0149] Figure 12 This diagram illustrates an example of the structure of the separating section 50. However, the separating section 50 described below is merely an example and is not limited to it. Figure 12 The plurality of notches 51 illustrated herein include an "upper notch 511" (second from the top), a "lower notch 512" (second from the bottom), and a "middle notch 513" located between the upper notch 511 and the lower notch 512. In the stretched state of the sanitary napkin 1, the vertical length L3 of the middle notch 513 is longer than the vertical length L1 of the upper notch 511 and the vertical length L2 of the lower notch 512 (L3 > L1, L3 > L2). The longer middle notch 513 serves as a starting point, making it easier to tear the separation portion 50. Furthermore, by making the middle notch 513, located inside the upper and lower ends of the waist member 20, longer, accidental tearing of the separation portion 50 can be prevented.

[0150] Additionally, the ventral waist portion 20f has: an upper intersection point pu, which is the intersection of the waist member 20 along the edge of the waist opening 1a (upper end 20fu) and the imaginary line VL along the separation portion 50; and a lower intersection point pl, which is the intersection of the waist member 20 along the edge of the leg opening 1b (lower end 20fl) and the imaginary line VL. In the extended state of the sanitary napkin 1, the waist member 20 has an upper region S1 extending from the upper intersection point pu to the inner side below 20mm, a lower region S2 extending from the lower intersection point pl to the inner side above 20mm, and an intermediate region S3 located between the upper region S1 and the lower region S2. Furthermore, the average length in the vertical direction of the plurality of notches 516 included in the upper region S1 but not located at the upper intersection point pu is defined as the "upper average value A1". In addition, the notch 516 included in the upper region S1 refers to the notch 51 whose entire length is located in the upper region S1. Similarly, the average length in the vertical direction of the plurality of notches 518 contained in the lower region S2 but not located at the lower intersection point p1 is defined as the "lower average value A2". In the above, the vertical length L3 of the middle notch 513 is preferably longer than the upper average value A1 and the lower average value A2 (L3 > A1 and L3 > A2). By setting it in this way, the longer middle notch 513 becomes the starting point, making it easier to tear the separation portion 50. In addition, it can suppress accidental tearing of the separation portion 50.

[0151] As described above, since the separating part 50 has a relatively long central notch 513, when wearing the sanitary napkin 1, the user can keep the hand that is holding the engaging member 30 in place while inserting the fingers of the opposite hand into the central notch 513 and grasping the waist member 20 to tear it open. In other words, the user can tear the waist member 20 open using the opposite hand without changing the position of the hand that is holding the engaging member 30 open, thereby engaging the engaging member 30 with the waist member 20. Therefore, the operability of engaging the engaging member 30 is improved. Furthermore, since the user can reliably grasp the waist member 20 with their hand while inserting their fingers into the central notch 513, force is easily transmitted to the waist member 20, making it easy to tear the waist member 20 open.

[0152] Furthermore, in the stretched state of the sanitary napkin 1, the average length (e.g., L51ave) of all the notches 51 except the middle notch 513 in the vertical direction is preferably longer than the average length (e.g., L52ave) of all the non-notch portions 52 in the vertical direction (L51ave > L52ave). By setting it this way, the proportion of the total length of the notches 51 in the separating portion 50 is increased, thereby making it easier to tear the separating portion 50.

[0153] ===Second Implementation Method===

[0154] In the second embodiment, a sanitary napkin 2 with a different structure than the sanitary napkin 1 of the first embodiment will be described. In the sanitary napkin 2, the structure other than the waist member 20 (e.g., the absorbent body 10, the locking member 30) is the same as that of the sanitary napkin 1. Therefore, the waist member 20, which has a different structure from the sanitary napkin 1, will be described below, and descriptions of structures other than the waist member 20 will be omitted.

[0155] Figure 13 This is an explanatory diagram showing the color of the sanitary napkin 2 in the second embodiment when viewed from the non-skin side in its unfolded and stretched state. Figure 14A This is a cross-sectional diagram of the front waist section at 20f. Figure 14B This is a cross-sectional diagram of the lower back section 20b. (See diagram below.) Figure 14A As shown, in the front waist section 20f of the sanitary napkin 2, a skin side sheet 22 (first sheet), a middle layer sheet 24 (second sheet), and a non-skin side sheet 21 (third sheet) are layered from the skin side in the thickness direction toward the non-skin side. Between the skin side sheet 22 and the middle layer sheet 24, a plurality of waist elastic members 26 (here, elastic bands) that can stretch in the left and right direction are provided at intervals in the vertical direction.

[0156] On the other hand, such as Figure 14BAs shown, the back waist portion 20b of the sanitary napkin 1 has skin side sheet 23 and non-skin side sheet 21 stacked from the skin side in the thickness direction toward the non-skin side. Multiple waist elastic members 26 are provided between the skin side sheet 23 and the non-skin side sheet 21 in a manner that is spaced apart in the vertical direction.

[0157] The non-skin side panel 21, skin side panels 22 and 23, and waist elastic member 26 each have a structure substantially the same as that of each member described in the sanitary napkin 1 of the first embodiment. The middle layer 24 is a non-stretchable sheet member, for example, formed from the same non-woven fabric as the skin side panels 22 and 23, and has the same shape (size) as the skin side panels 22 (23). In addition, the waist elastic member 26 is not limited to elastic bands, but can also be a stretchable sheet.

[0158] The non-skin side sheet 21, the front skin side sheet 22, the back skin side sheet 23, the middle layer sheet 24, and the base sheet 31 of the locking member 30 are all made of sheets that are colored in the same color family (e.g., light pink). Therefore, when the sanitary napkin 2 is stretched, when viewed from the non-skin side, the color of the entire area of ​​the front waist section 20f, the entire area of ​​the locking member 30, and the entire area of ​​the back waist section 20b are all colored in the same color family, but with different shades. In the sanitary napkin 2 of the second embodiment, the color of the front waist section 20f, which is made of three colored sheets, is darker than the color of the back waist section 20b, which is made of two colored sheets.

[0159] Therefore, in sanitary napkin 2, the colored area of ​​the same color family is enlarged, reducing the appearance of disposable diapers and improving the design for everyday use. Furthermore, by using the same color family for the front waist section 20f and the locking member 30, the locking member 30 is prevented from being too conspicuous, reducing the appearance of a disposable diaper in sanitary napkin 2. However, since the color of the component in the front waist section 20f and the color of the locking member 30 differ in shade, the user can identify the locking member 30. Preferably, the color of the locking member 30 is darker than the color of the component in the front waist section 20f, making it easier to identify. Additionally, by making the shades of the front waist section 20f and the back waist section 20b different, it is easier to determine the front and back of the sanitary napkin 1. Furthermore, the method for determining the same color family and shade can be performed using the method described in the first embodiment. However, the relationship of the shades of the same color family can also be different from the relationship described above.

[0160] Furthermore, it is not limited to the above structure, as long as at least a portion of the color of the components of the front waist section 20f, at least a portion of the color of the engaging component 30, and at least a portion of the color of the components of the rear waist section 20b are colored in the same color family but with different shades. Additionally, although in Figure 13The waist member 20 shown does not have a folded portion of sheet material (e.g., non-skin side sheet 21) at its upper end, but it may have a folded portion of sheet material in the same way as the sanitary napkin 1.

[0161] Furthermore, when separation portions 50 (tear lines) are provided on both sides of the front waist section 20f in the left and right directions, it is preferable to use the following: At least in the portion of the front waist section 20f that is more inner in the left and right directions than the separation portions 50, it is preferable to have three or more sheets (skin-side sheet 22, middle layer sheet 24, and non-skin-side sheet 21) stacked in the thickness direction of the front waist section 20f. Figure 13 In the front waist section 20f, three or more sheets are also stacked on the outer side in the left-right direction compared to the separation section 50.

[0162] Based on the above structure, the rigidity of the inner part of the front waist section 20f in the left-right direction compared to the separating part 50 is increased, making it less likely for the remaining edge of the front waist section 20f at the separating part 50 to curl. Therefore, the user can easily grasp the remaining edge of the front waist section 20f and pull it with peace of mind. In addition, the engaging part 32 can engage with the relatively flat part of the front waist section 20f, making it easier for the engaging member 30 to engage.

[0163] Additionally, the portion of the front waist section 20f that is more laterally inner than at least the separated portion 50 is preferably as described below. Figure 14A As shown, the non-skin side sheet 21 and the middle layer sheet 24 are bonded together using an adhesive such as a hot melt adhesive (HMA). The skin side sheet 22 and the middle layer sheet 24 are bonded together using an adhesive such as a hot melt adhesive (HMA) applied to the surface of the waist elastic member 26. Furthermore, the non-skin side sheet 21 and the middle layer sheet 24 are bonded together by intermittently arranged hot melt adhesive (HMA). In other words, the non-skin side sheet 21 (the third sheet) and the middle layer sheet 24 (the second sheet) have a bonded portion (HMA) and a non-bonded portion NA.

[0164] In the above structure, no waist elastic member 26 is provided between the non-skin side piece 21 and the middle layer piece 24. Therefore, when the engaging portion 32 (hook 321) of the engaging member 30 is pressed against the non-skin side of the front waist portion 20f, the middle layer piece 24 functions as an interference member, and the influence of the hook 321 is less likely to affect the waist elastic member 26. Thus, it is possible to prevent the waist elastic member 26 from being damaged or cut by the hook 321. In addition, by providing the middle layer piece 24, the force applied to the waist elastic member 26 when peeling off the engaging member 30 can also be reduced, making it easier to maintain the state of the waist elastic member 26 sandwiched between the middle layer piece 24 and the skin side piece 22. Moreover, it is easy to form a space from the non-jointing portion NA between the non-skin side piece 21 and the middle layer piece 24, so that when the engaging member 30 is engaged, the influence of the hook 321 is less likely to affect the waist elastic member 26. Furthermore, by utilizing the space between the non-skin side panel 21 and the middle layer panel 24, the force exerted when peeling off the locking member 30 is less likely to directly affect the waist elastic member 26. Therefore, it is possible to suppress the functional decline of the waist elastic member 26 and maintain the fit of the front waist section 20f.

[0165] Preferably, the sanitary napkin 2 is in its stretched state ( Figure 13 In the case of a sanitary napkin 2, when viewed in the thickness direction, it is preferable to have a non-engaging portion NA in the portion opposite to the engaging member 30. Similarly, in the extended state of the sanitary napkin 2, when viewed in the thickness direction, it is preferable to have a non-engaging portion NA in the portion opposite to the engaging portion 32. Thus, the non-engaging portion NA is easily positioned for engagement by the engaging member 30 (engaging portion 32), which can suppress the functional decline of the waist elastic member 26 caused by the disassembly and assembly of the engaging member 30.

[0166] Preferably, such as Figure 14A As shown, it is preferable that the non-jointing portion NA is continuous in the vertical direction across multiple waist elastic members 26. By utilizing the long non-jointing portion NA in the vertical direction, it is easy for the non-jointing portion NA and the waist elastic member 26 to be aligned, and the functional decline of the waist elastic member 26 caused by the disassembly and assembly of the engaging member 30 can be suppressed.

[0167] ===Other===

[0168] The above-described embodiments are intended to facilitate understanding of the present invention and are not intended to limit the scope of the invention. It is self-evident that the present invention can be modified and improved without departing from its spirit, and that equivalents are included in the present invention.

Claims

1. A type of shorts-shaped sanitary napkin, having intersecting vertical and horizontal directions. This shorts-style sanitary napkin has the following features: An absorbent substrate with an absorbent core that is capable of absorbing liquids; The waist structure comprises a front waist section and a rear waist section; and A locking member, wherein the outer end of the locking member in the left-right direction is fixed to the waist member in a non-separable manner, and the inner end of the locking member in the left-right direction is detachably locked to the non-skin side of the front waist section. The front waist section and the rear waist section are joined together at their two ends in the left-right direction by a pair of lateral joints, characterized in that... The shorts-type sanitary napkin has a crotch elastic member, which is positioned closer to the non-skin side than the absorbent core and stretches along the vertical direction. In the stretched state of the shorts-type sanitary napkin, The engaging member has a convex shape in the central region of the three regions when the engaging member is divided into three equal parts in the vertical direction. The convex shape is a curved shape with only one part protruding from the outside to the inside in the horizontal direction. When viewed from the non-skin side, at least a portion of the color of the front waist body component and at least a portion of the color of the engaging component are colored in the same color family, but with different shades.

2. The shorts-type sanitary napkin according to claim 1, characterized in that, In the stretched state of the shorts-type sanitary napkin, when viewed from the non-skin side, at least a portion of the color of the front waist component, at least a portion of the color of the locking component, and at least a portion of the color of the rear waist component are colored in the same color family, but with different shades.

3. The panty-type sanitary napkin according to claim 1 or 2, characterized in that, The front waist section has a separation portion for separating the waist member. In the portion of the front waist section located on the inner side in the left-right direction compared to the separated portion, three or more sheets are stacked in the thickness direction of the front waist section.

4. The panty-type sanitary napkin according to claim 3, characterized in that, In the portion of the front waist section located on the inner side in the left-right direction compared to the separated portion, a first piece, a second piece, and a third piece are layered from the skin side in the thickness direction toward the non-skin side. An elastic waist member that extends and retracts in the left-right direction is provided between the first piece and the second piece. The waist elastic member is not provided between the second and third pieces. The second and third pieces have portions that are not joined together.

5. The panty-type sanitary napkin according to claim 1 or 2, characterized in that, In the stretched state of the shorts-type sanitary napkin, When viewed from the non-skin side, the color of the locking member is darker than the color of the member of the front waist section.

6. The panty-type sanitary napkin according to claim 1 or 2, characterized in that, In the stretched state of the shorts-type sanitary napkin, The region where the uppermost region of the front waist section overlaps with the region of the four regions divided into four equal parts in the vertical direction is designated as the upper end region, and the region where the front waist section overlaps with the third region from the upper side in the vertical direction is designated as the middle region. When viewed from the non-skin side, the color of the same hue in the upper region is darker than that in the middle region.

7. The panty-type sanitary napkin according to claim 1 or 2, characterized in that, The absorbent body has a backing sheet positioned on the non-skin side compared to the absorbent core. The film has a pattern that can be visually recognized from the non-skin side of the panty-shaped sanitary napkin. In the stretched state of the shorts-type sanitary napkin, When viewed from the non-skin side, at least a portion of the pattern on the film is a colored element of the same color family as the color of the front waist component, but in different shades.

8. The shorts-type sanitary napkin according to claim 7, characterized in that, The engaging component has an engaging portion with multiple hooks. In the stretched state of the shorts-type sanitary napkin, The average brightness of the color of the engaging portion, when viewed from the surface side, is higher than the average brightness of the color of the front waist member, the average brightness of the color of the engaging member, and the average brightness of the color of the pattern on the film, when viewed from the non-skin side.

9. The panty-type sanitary napkin according to claim 1 or 2, characterized in that, The engaging member has an engaging portion with multiple hooks and a base plate supporting the engaging portion. The locking member has a locking pattern that is visually recognizable from the non-skin side of the panty-shaped sanitary napkin. The engagement pattern of the region of the engagement member that is more inner in the left-right direction than the engagement portion is different from the engagement pattern of the region of the engagement member that is more outer in the left-right direction than the engagement portion.

10. The panty-type sanitary napkin according to claim 9, characterized in that, The engagement pattern is formed by compressing the substrate sheet in the thickness direction of the engagement member. The maximum depth of the compression portion in the engagement pattern of the inner region is deeper than the maximum depth of the compression portion in the engagement pattern of the outer region.

11. The panty-type sanitary napkin according to claim 1 or 2, characterized in that, The engaging member has an engaging portion with multiple hooks and a base plate supporting the engaging portion. The engaging portion is bonded to the substrate sheet by an adhesive and is fused together at the compression portion.

12. The panty-type sanitary napkin according to claim 11, characterized in that, When viewed in the thickness direction of the engaging member, portions of the plurality of hooks partially overlap with the compression portion.

13. The panty-type sanitary napkin according to claim 1 or 2, characterized in that, The engaging component has an engaging portion with multiple hooks. The overall outline of the engaging member is curved, located on the inner side of the engaging portion in the left-right direction.

14. The panty-type sanitary napkin according to claim 1 or 2, characterized in that, The engaging components are respectively disposed on both sides of the waist component in the left-right direction. The shape of one side of the engaging member in the left-right direction is different from the shape of the other side of the engaging member in the left-right direction.

15. A type of shorts-shaped sanitary napkin, having intersecting vertical and horizontal directions. This shorts-style sanitary napkin has the following features: An absorbent substrate with an absorbent core that is capable of absorbing liquids; The waist structure comprises a front waist section and a rear waist section; and A locking member, wherein the outer end of the locking member in the left-right direction is fixed to the waist member in a non-separable manner, and the inner end of the locking member in the left-right direction is detachably locked to the non-skin side of the front waist section. The front waist section and the rear waist section are joined together at their two ends in the left-right direction by a pair of lateral joints, characterized in that... The shorts-type sanitary napkin has a crotch elastic member, which is positioned closer to the non-skin side than the absorbent core and stretches along the vertical direction. In the stretched state of the shorts-type sanitary napkin, The engaging member has a convex shape in the central region of the three regions when the engaging member is divided into three equal parts in the vertical direction. The convex shape is a curved shape with only one part protruding from the outside to the inside in the horizontal direction. When viewed from the non-skin side, at least a portion of the color of the front waist component and at least a portion of the color of the engaging component are colors of the same color family, but with different shades. The lower end of the side edge of the outer end of the engaging member is not located below the lower end of the side edge of the front waist part.

Images