Decorative film for absorbent products

Abstract

The utility model provides a decorative film for an absorptive product. The purpose of the present invention is to impress a user who visually recognizes or touches a three-dimensional decorative layer of a decorative film used in any one of an absorbent article, an independent packaging body for the absorbent article, and a packaging body for the absorbent article that the absorbent article is a product in which the absorbent article deforms softly and finely. A decorative film for an absorbent product, which is used in any one of an absorbent article (1), an individual packaging body (30) for the absorbent article, and a packaging body for the absorbent article, is provided with: a film (51); an adhesive layer (52) provided on the surface of the film; and a decorative layer (53) which is provided on the adhesive layer and has a maximum thickness of 10 [mu] m or less, the decorative layer being provided at a site where a finger of a user can contact and protruding from the surface of the film in the thickness direction of the film, and the minimum width of the adhesive layer, the average fiber diameter of the surface sheet of the absorbent article, and the average inter-fiber distance being less than 0.4 mm.

Description

Technical Field

[0001] This utility model relates to a decorative film for absorbent products. Background Technology

[0002] Patent Document 1 discloses a method for manufacturing a decorative sheet in which a marking layer (text, graphics, etc.) made of foil with metallic components is formed on a material sheet. Specifically, the manufacturing method is as follows: a transfer film having foil and a material sheet are fed overlappingly between a pattern roller and a support roller, and a foil corresponding to the pattern on the outer peripheral surface of the pattern roller is pressed onto the material sheet to form a marking layer.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2022-12041 Utility Model Content

[0006] Problems to be solved by utility models

[0007] In the decorative sheet of Patent Document 1, the marking layer is formed by pressing foil together. Therefore, the marking layer is concave relative to its surroundings, allowing the user to feel the unevenness when touching it. However, to stably press the foil onto the material sheet, the width of the raised portion of the pattern roller needs to be appropriately ensured. Consequently, the width (unevenness) of the marking layer becomes larger, making it difficult to represent the softness (fiber fineness) of the nonwoven fabric or similar sheet constituting the absorbent article. Therefore, even if the user visually recognizes or touches the marking layer of Patent Document 1, it is difficult to imagine the softness of the absorbent article, and there is room for improvement in the three-dimensional marking layer.

[0008] This invention was made in view of the aforementioned problems, and its purpose is to give users who visually recognize or touch the three-dimensional decorative layer of the decorative film used on any of the absorbent articles, the individual packaging of absorbent articles, and the encapsulation of absorbent articles the impression that the absorbent articles are soft and delicately deformable products.

[0009] Solution for solving the problem

[0010] The main utility model for achieving the above objectives is a decorative film for absorbent products, characterized in that:

[0011] The decorative film for absorbent products is used on any of the following: absorbent articles, individual packaging of absorbent articles, and encapsulation of absorbent articles, and is used to apply decoration.

[0012] The decorative film used in this absorbent product has the following characteristics:

[0013] membrane;

[0014] An adhesive layer is disposed on the surface of the membrane; and

[0015] A decorative layer, disposed above the adhesive layer, has a maximum thickness of less than 10 μm.

[0016] The decorative layer is located in an area accessible to the user's fingers and protrudes from the surface of the film in the thickness direction of the film.

[0017] The minimum width of the adhesive layer, the average fiber diameter of the surface sheets of the absorbent article, and the average interfiber distance of the surface sheets are all less than 0.4 mm.

[0018] Preferably, the maximum thickness of the adhesive layer is greater than the maximum thickness of the decorative layer.

[0019] Preferably, the maximum thickness of the overlapping portion of the decorative layer and the adhesive layer and the average fiber diameter of the surface sheet are less than 50 μm.

[0020] Preferably, the decorative film for the absorbent product has an additional adhesive layer that protrudes from the surface of the film and does not overlap with the decorative layer, the minimum width of the additional adhesive layer being less than 0.4 mm, the absorbent article having a width direction and a length direction, and having a pair of side pieces arranged along the length direction at both ends of the skin side of the surface sheet in the width direction, the coefficient of kinetic friction of the skin side of the surface sheet being different from the coefficient of kinetic friction of the skin side of the side pieces.

[0021] Preferably, the portion of the membrane having the decorative layer and the adhesive layer has better flexibility and higher stiffness compared to the portion of the membrane without adhesive forming the adhesive layer.

[0022] Preferably, the overlapping portion of the decorative layer and the adhesive layer has a portion with a different thickness.

[0023] Preferably, at the location where the decorative layer overlaps with the adhesive layer, the thickness of the end in a predetermined direction is smaller than the thickness of the portion adjacent to that end on the inner side of the predetermined direction.

[0024] Preferably, the decorative layer is formed from any one of metal foil, holographic foil, or pigment foil.

[0025] Preferably, the decorative film for the absorbent product has a first adhesive layer with a minimum width of less than 0.4 mm and a second adhesive layer adjacent to the first adhesive layer. In the width direction of the first adhesive layer, the minimum interval between the first adhesive layer and the second adhesive layer is 0.47 mm or more, and the value obtained by dividing the total area of ​​one or more of the decorative layers by the planar area of ​​the film is 0.8% or more and less than 6.8%.

[0026] Preferably, the absorbent article has an absorbent core comprising a highly absorbent polymer, and the minimum width of the adhesive layer is smaller than the maximum particle size of the highly absorbent polymer.

[0027] Preferably, the minimum width of the adhesive layer is smaller than the average particle size of the highly absorbent polymer.

[0028] Preferably, the decorative film for the absorbent product has a third adhesive layer and a fourth adhesive layer, the maximum thickness of the third adhesive layer being different from the maximum thickness of the fourth adhesive layer, the absorbent article having a width direction and a length direction, and having a pair of side pieces arranged along the length direction at both ends of the skin side of the surface sheet in the width direction, the average thickness of the surface sheet being different from the average thickness of the side pieces.

[0029] Other features of this utility model will be explained by the description in this specification and the accompanying drawings.

[0030] Effects of the utility model

[0031] According to this invention, a three-dimensional decorative layer of a decorative film used on any of the absorbent articles, individual packaging of absorbent articles, and encapsulation of absorbent articles can give users the impression that the absorbent articles are soft and delicately deformable products. Attached Figure Description

[0032] Figure 1 This is a top view of the unfolded sanitary napkin 1, viewed from the skin side.

[0033] Figure 2 This is a simplified cross-sectional view of sanitary napkin 1.

[0034] Figure 3 This is a top view of the individually packaged sanitary napkin 30 in its unfolded state, viewed from the non-skin side.

[0035] Figure 4 This is a top view obtained by observing the individually packaged sanitary napkin 30 unfolded from the skin side.

[0036] Figure 5 This is a top view of the individual packaging unit 30 of the sanitary napkin.

[0037] Figure 6A This is a 3D view of the packaging body 40 of a sanitary napkin. Figure 6B This diagram shows the state of the container 41 after it has been opened.

[0038] Figure 7 This is the front view of package 40.

[0039] Figure 8 This is the rear view of package 40.

[0040] Figure 9A , Figure 9B , Figure 9C , Figure 9D This is a diagram illustrating the minimum width W52m of the adhesive layer 52.

[0041] Figure 10 This is a diagram illustrating the average fiber diameter and the average distance between fibers.

[0042] Figure 11A and Figure 11B This is a diagram illustrating the decorative film 50.

[0043] Figure 12A and Figure 12B This is a diagram illustrating the decorative film 50.

[0044] Figure 13 This diagram illustrates the individual adhesive layer 55.

[0045] Figure 14 This diagram illustrates the manufacturing method of decorative film 50.

[0046] Explanation of reference numerals in the attached figures

[0047] 1. Sanitary napkin (absorbent); 2. Surface sheet; 3. Middle sheet; 4. Back sheet; 5. Wings; 6. Side sheets; 8. Adhesive part; 9. Adhesive part; 10. Absorbent body; 11. Absorbent core; 12. Core pack; 20. Compression part; 30. Individual packaging of sanitary napkin; 31. Packaging sheet; 32. Fixing strap; 33. Release tab; 34. Release tab; 35. Joining part; 36. Welded part; 40. Encapsulation body of sanitary napkin; 41. Storage 42. Body; 43. Sealing component; 50. Decorative film; 51. Film; 52. Adhesive layer; 52E. Protrusion; 53. Decorative layer; 54. Three-dimensional decorative part; 55. Separate adhesive layer (other adhesive layers); 60. Printing layer; 70. Manufacturing apparatus; 71. Conveying mechanism; 72. Ink ejection device; 73. Adhesive ejection device; 74. First irradiation device; 75. Decorative layer conveying mechanism; 76. Second irradiation device. Detailed Implementation

[0048] Based on the description in this specification and the accompanying drawings, at least the following matters are explained.

[0049] (Method 1)

[0050] A decorative film for absorbent products, characterized in that,

[0051] This decorative film for absorbent products is used in any of the following: absorbent articles, individual packaging of absorbent articles, and encapsulation of absorbent articles, and is used to apply decoration. The decorative film for absorbent products comprises: a film; an adhesive layer disposed on the surface of the film; and a decorative layer disposed on the adhesive layer with a maximum thickness of 10 μm or less. The decorative layer is disposed in a portion accessible to the user's fingers and protrudes from the surface of the film in the thickness direction of the film. The minimum width of the adhesive layer, the average fiber diameter of the surface sheets of the absorbent article, and the average interfiber distance of the surface sheets are all less than 0.4 mm.

[0052] According to method 1, even a thin decorative layer can protrude in the thickness direction of the sheet by overlapping with the adhesive layer. Furthermore, compared to cases where the minimum width of the adhesive layer is 0.4 mm or more, the adhesive layer easily penetrates between fingerprints, making it easier for users to visually and tactilely identify the product as having a three-dimensional and delicate decoration. This gives users the impression that the absorbent material, like a delicate decoration, is soft and subtly deformable. Moreover, compared to cases where the average fiber diameter and average interfiber distance of the surface sheet are 0.4 mm or more, users can easily feel the tiny bumps and depressions formed by the fibers of the surface sheet between their fingerprints. Therefore, users can clearly perceive that the actual absorbent material is also soft and subtly deformable.

[0053] (Method 2) Based on the decorative film for absorbent products described in Method 1,

[0054] The maximum thickness of the adhesive layer is greater than the maximum thickness of the decorative layer.

[0055] According to method 2, the decorative layer can be made to protrude further in the thickness direction of the sheet. In addition, the adhesive layer, which is both adhesive and elastic, is thicker, so that the fingers of users touching the decorative layer and the adhesive layer can be easily pushed back, and users can easily identify the application of delicate decorations by touch.

[0056] (Method 3) Based on the decorative film for absorbent products described in Method 1 or 2

[0057] The maximum thickness of the overlapping portion of the decorative layer and the adhesive layer and the average fiber diameter of the surface sheet are less than 50 μm.

[0058] According to method 3, compared to cases where the maximum thickness of the overlapping area of ​​the decorative layer and the adhesive layer and the average fiber diameter of the surface sheet are 50 μm or more, most of the adhesive layer and most of the fibers of the surface sheet are more likely to enter between fingerprints. Therefore, users can easily identify cases with delicate decorations by touch and can clearly feel the actual absorbent material deforming softly and subtly.

[0059] (Method 4) Based on the decorative film for absorbent products described in any of Methods 1 to 3.

[0060] The decorative film for the absorbent product has an additional adhesive layer that protrudes from the surface of the film and does not overlap with the decorative layer. The minimum width of the additional adhesive layer is less than 0.4 mm. The absorbent article has a width direction and a length direction. At both ends of the skin side of the surface sheet in the width direction, there is a pair of side pieces arranged along the length direction. The coefficient of kinetic friction of the skin side of the surface sheet is different from the coefficient of kinetic friction of the skin side of the side pieces.

[0061] According to method 4, compared to other adhesive layers with a minimum width of 0.4 mm or more, other adhesive layers are more likely to penetrate between fingerprints. Therefore, users can easily identify the application of delicate decorations through touch. Furthermore, users are more likely to perceive that the product is meticulously manufactured with decorations that offer different tactile (frictional) qualities. Moreover, by touching the surface sheets and side sheets with different frictional qualities, users can clearly feel that the actual absorbent material is carefully manufactured using different materials depending on its intended use.

[0062] (Method 5) Based on the decorative film for absorbent products described in any of Methods 1 to 4.

[0063] For the portion of the membrane having the decorative layer and the adhesive layer, compared to the portion of the membrane without adhesive forming the adhesive layer, it has better flexibility and higher stiffness.

[0064] According to method 5, the decorative layer and adhesive layer exhibit good flexibility and elasticity, as well as high stiffness and rigidity. Therefore, when a user touches the decorative layer and adhesive layer, their finger is easily pushed back and its shape is easily maintained. This allows the user to easily identify areas with delicate decorations by touch.

[0065] (Method 6) Based on the decorative film for absorbent products described in any of Methods 1 to 5.

[0066] The overlapping portions of the decorative layer and the adhesive layer have different thicknesses.

[0067] According to method 6, the decorative layer can be easily identified visually in three dimensions. In addition, the corners with varying thicknesses easily slip into the fingerprint creases. Thus, users can easily identify cases with applied three-dimensional and delicate decorations through both visual and tactile senses.

[0068] (Method 7) Based on the decorative film for absorbent products described in Method 6.

[0069] At the location where the decorative layer overlaps with the adhesive layer, the thickness of the end in a predetermined direction is smaller than the thickness of the portion adjacent to that end on the inner side of the predetermined direction.

[0070] According to method 7, the overlapping area of ​​the decorative layer and the adhesive layer can easily enter the fingerprint space between the fingers from its thinner end. Therefore, users can easily identify areas with delicate decorations by touch.

[0071] (Method 8) Based on the decorative film for absorbent products described in any of Methods 1 to 7.

[0072] The decorative layer is formed from any one of metal foil, holographic foil, or pigment foil.

[0073] According to method 8, the aesthetic appeal of the three-dimensional decorative layer can be enhanced. Users who visually recognize or touch the decorative layer with a metallic sheen formed from metal foil or holographic foil can get the impression that the absorbent material is a high-quality product. On the other hand, the decorative layer formed from pigment foil becomes a matte finish, giving users the impression that the product offers a stable and reassuring feel.

[0074] (Method 9) Based on the decorative film for absorbent products described in any of Methods 1 to 8.

[0075] The decorative film for the absorbent product has a first adhesive layer with a minimum width of less than 0.4 mm and a second adhesive layer adjacent to the first adhesive layer. In the width direction of the first adhesive layer, the minimum interval between the first adhesive layer and the second adhesive layer is 0.47 mm or more. The value obtained by dividing the total area of ​​one or more of the decorative layers by the planar area of ​​the film is 0.8% or more and less than 6.8%.

[0076] According to method 9, compared to cases where the minimum spacing between the first and second adhesive layers is less than 0.47 mm, the first adhesive layer is more easily visually identified as a separate, smaller decorative layer, and it is also easier for the first adhesive layer to be individually incorporated into the fingerprint space. Therefore, users can easily identify the application of delicate decorations both visually and tactilely. Furthermore, compared to cases where the area ratio of the decorative layer is less than 0.8%, the probability of the decorative layer being visually identified or touched by the user is increased. Conversely, compared to cases where the area ratio of the decorative layer is 6.8% or more, it is easier to ensure the spacing of the decorative layers, and the decoration is easily visually identified or touched individually. Therefore, users can easily identify the application of delicate decorations.

[0077] (Method 10) Based on the decorative film for absorbent products described in any of Methods 1 to 9.

[0078] The absorbent article has an absorbent core comprising a highly absorbent polymer, wherein the minimum width of the adhesive layer is smaller than the maximum particle size of the highly absorbent polymer.

[0079] According to method 10, by using an adhesive layer with a width smaller than the maximum particle size of the highly absorbent polymer, users can easily identify the application of delicate decorations by touch. On the other hand, users can easily identify the presence of highly absorbent polymers with a maximum particle size larger than the minimum width of the adhesive layer, which can alleviate anxiety about leaks.

[0080] (Method 11) Based on the decorative film for absorbent products described in Method 10,

[0081] The minimum width of the adhesive layer is smaller than the average particle size of the highly absorbent polymer.

[0082] According to method 11, by using an adhesive layer with a width smaller than the average particle size of the highly absorbent polymer, users can easily identify the application of delicate decorations by touch. On the other hand, users can easily identify the presence of highly absorbent polymers with an average particle size larger than the minimum width of the adhesive layer, which can alleviate anxiety about leakage.

[0083] (Method 12) Based on the decorative film for absorbent products described in any of Methods 1 to 11

[0084] The decorative film for the absorbent product has a third adhesive layer and a fourth adhesive layer, the maximum thickness of the third adhesive layer being different from the maximum thickness of the fourth adhesive layer. The absorbent article has a width direction and a length direction, and a pair of side pieces are provided at both ends of the skin side of the surface sheet in the width direction, arranged along the length direction. The average thickness of the surface sheet is different from the average thickness of the side pieces.

[0085] According to method 12, users who touch the third and fourth adhesive layers are likely to receive the impression that the product is a meticulously crafted item with decorations of varying thicknesses. Moreover, by touching the surface and side sheets of varying thicknesses, users can clearly feel that the actual absorbent item is also meticulously crafted using materials of varying thicknesses depending on its intended use.

[0086] ===Implementation Methods===

[0087] The following describes, using sanitary napkins as an example, an implementation of a decorative film for absorbent products, specifically for absorbent articles, individual packaging of absorbent articles, and encapsulation of absorbent articles. Absorbent articles are not limited to sanitary napkins, but also include disposable diapers (in the form of panties or belts), panty liners, shorts-type sanitary napkins, incontinence pads, diaper pads, nursing pads, underarm pads, disposable diapers for pets, and other absorbent articles.

[0088] <<Basic Structure of Sanitary Napkins>>

[0089] Figure 1 This is a top view of the unfolded sanitary napkin 1, viewed from the skin side. Figure 2 This is a schematic cross-sectional view of sanitary napkin 1. The unfolded sanitary napkin 1 has mutually orthogonal length, width, and thickness directions. In the length direction, the side that rests against the wearer's lower abdomen is called the "front side," and the side that rests against the wearer's buttocks is called the "back side." Furthermore, in the thickness direction of the sanitary napkin 1, the side that rests against the wearer's skin is called the "skin side," and the opposite side is called the "non-skin side."

[0090] like Figure 2 As shown, the sanitary napkin 1 has a surface sheet 2, an intermediate sheet 3, an absorbent core 10, a bottom sheet 4, wings 5, and side sheets 6. Adjacent materials in the thickness direction are joined and fixed using an adhesive (not shown) such as a hot-melt adhesive. The surface sheet 2 and the intermediate sheet 3 are liquid-permeable sheet members, such as non-woven fabrics. The bottom sheet 4 is a liquid-impermeable sheet member, such as a resin film. The side sheets 6 are folded back from the end of the non-skin side of the absorbent core 10 in the width direction to the end of the surface sheet 2 in the width direction on the skin side. The bottom sheet 4 and the wings 5 ​​extend outward in the width direction relative to the side sheets 6, forming a wing 1w at the center of the sanitary napkin 1 in the length direction.

[0091] Alternatively, the surface sheet 2, which comes into contact with the wearer's skin, can also be made of cotton, a natural fiber (e.g., a sheet component made of 100% cotton, a blend of cotton and hot-air nonwoven fabric, etc.). This reduces irritation to the wearer's skin. In this case, as shown in the accompanying drawings described later, by providing patterns representing cotton on the sanitary napkin 1, the individual packaging 30, and the encapsulation 40, the user can be informed that cotton is being used. However, the surface sheet 2 may not be made of cotton.

[0092] The absorbent 10 is a component that absorbs and retains excrement inside. Figure 2 The absorbent 10 has an absorbent core 11 and a core sheet 12 covering the absorbent core 11. The absorbent core 11 is formed into a predetermined shape from pulp fibers, cellulose fibers, or other absorbent fibers that are liquid absorbent fibers. The core sheet 12 is a liquid-permeable sheet component, such as cotton paper. However, the structure of the absorbent 10 is not limited to the above structure. For example, it may be a SAP sheet formed by attaching a SAP layer to a hydrophilic sheet, or an air-laid sheet formed by forming liquid absorbent fibers into a sheet shape using an air-laid method.

[0093] The basic structure of sanitary napkin 1 has been explained above, but the structure of sanitary napkins is not limited to the above structure. For example, it can also be a sanitary napkin without wings 1w, etc.

[0094] <<Individually packaged sanitary napkins 30>>

[0095] Figure 3 This is a top view of the individually packaged sanitary napkin 30 in its unfolded state, viewed from the non-skin side. Figure 4 This is a top view obtained by observing the individually packaged sanitary napkin 30 unfolded from the skin side. Figure 5 This is a top view of the individual packaging unit 30 of the sanitary napkin.

[0096] The individual packaging unit 30 (hereinafter also referred to as "individual packaging unit 30") of the sanitary napkin 1 is formed by independently packaging the sanitary napkin 1 with a packaging sheet 31, and includes the sanitary napkin 1, the packaging sheet 31, the fixing strap 32, and the release tabs 33 and 34. The packaging sheet 31 is a rectangular sheet component, and examples include resin film, non-woven fabric, paper, and sheets formed by laminating the above materials. The length direction of the packaging sheet 31 corresponds to the length direction of the sanitary napkin 1, and the width direction of the packaging sheet 31, which is the short side direction, corresponds to the width direction of the sanitary napkin 1. The fixing strap 32 is provided at the end of the packaging sheet 31 in the length direction.

[0097] like Figure 3As shown, multiple adhesive portions 8 and 9 coated with adhesive or the like are provided on the non-skin side of the sanitary napkin 1 (i.e., the non-skin side of the backing 4). Multiple rectangular adhesive portions 8 extending along the length direction are arranged in the width direction of the main body of the sanitary napkin 1. These adhesive portions 8 of the main body are used to fix the main body of the sanitary napkin 1 to the inner side of the wearer's underwear. Additionally, multiple rectangular adhesive portions 9 extending along the length direction are also arranged in the width direction of the wing portion 1w. When the sanitary napkin 1 is worn, the wing portion 1w is bent and fixed to the outer side of the underwear using the adhesive portions 9. Furthermore, the shape, number, and arrangement of the adhesive portions 8 and 9 are not limited to... Figure 3 The example is shown.

[0098] In the individual packaging 30, the non-skin side of the sanitary napkin 1 is secured to the packaging sheet 31 via a release liner 33. The release liner 33 covers the adhesive portion 8 of the main body of the sanitary napkin 1, allowing the sanitary napkin 1 to be easily peeled off when the individual packaging 30 is opened. Additionally, as... Figure 4 As shown, the wing 1w is folded inward in the width direction on the skin side of the sanitary napkin 1. The adhesive portion 9 of the wing 1w is covered by the release tab 34. In addition, the sanitary napkin 1 can be directly and peelably fixed to the packaging sheet 31 without being secured to the packaging sheet 31 through the release tab 33.

[0099] Packaging sheet 31 and sanitary napkin 1 Figure 4 The state begins with folding at two folds F1 and F2 along the width direction. The two ends of the packaging sheet 31, folded together with the sanitary napkin 1, are joined in the width direction, as shown below. Figure 5 The joint 35 is formed as shown. Examples of joint methods at the joint 35 include known methods such as heat sealing, ultrasonic sealing, adhesives, and combinations thereof. Additionally, a retaining strap 32 is provided across the opening end of the packaging sheet 31. The user holds the retaining strap 32 and unfolds the folds F1 and F2 to open the individual packaging unit 30.

[0100] The above describes the individual packaging 30 for sanitary napkins, but the structure of the individual packaging 30 is not limited to the above structure. For example, the number of folds F1 and F2 on the packaging sheet 31 is not limited to two; it can be one or more. Furthermore, the packaging sheet 31 and the sanitary napkin 1 can be folded not only at the folds F1 and F2 along the width direction but also at the folds along the length direction. Alternatively, the packaging sheet 31 and the sanitary napkin 1 can be folded independently. That is, the packaging sheet 31 can also be folded to enclose a pre-folded sanitary napkin 1.

[0101] <<Sanitary Napkin Packaging Body 40>>

[0102] Figure 6AThis is a 3D view of the packaging body 40 of a sanitary napkin. Figure 6B This diagram shows the state of the storage body 41 after it has been opened. The sanitary napkin packaging body 40 (hereinafter also referred to as "packaging body 40") has multiple individual packaging bodies 30 for sanitary napkins and a storage body 41 for storing the aforementioned multiple individual packaging bodies 30 for sanitary napkins. In addition, the storage body is not limited to individual packaging bodies for storing absorbent items, but can also directly store one or more absorbent items that are not individually packaged, such as disposable diapers.

[0103] Figure 6A The illustrated storage body 41 has a vertical, horizontal, and front-back orientation, and includes a rectangular main body 42 and a sealing member 43. The sealing member 43 is located on the back side 41B of the encapsulation body 40 (storage body 41). Specifically, the sealing member 43 is located on the upper rear side of the storage body 41. A gripping portion 431 is provided at the center of the sealing member 43 in the horizontal direction. Furthermore, a cutting line 44 (e.g., an easy-tear line) is formed on the portion of the main body 42 covered by the sealing member 43. The user pinches the gripping portion 431 and pulls the sealing member 43, thereby... Figure 6B As shown, a portion of the main body 42 is bonded to the sealing member 43 along the cut line 44 to form an opening 45, which serves as the dispensing port for the sanitary napkin 1.

[0104] also, Figure 6A The shape and structure of the storage body 41 shown are just one example and are not limited thereto. For example, it can also be a cuboid-shaped storage body without a sealing member 43, a stand-up pouch, a flat bag, or other storage bodies.

[0105] <<Decorative film for absorbent products 50>>

[0106] Figure 7 This is the front view of package 40. Figure 8 This is the rear view of package 40. Figures 9A to 9D This is a diagram illustrating the minimum width W52m of the adhesive layer 52. Figure 10 This is a diagram illustrating the average fiber diameter and the average distance between fibers. Figure 11A , Figure 11B , Figure 12A as well as Figure 12B This is a diagram illustrating the decorative film 50. Figure 13 This diagram illustrates the individual adhesive layer 55.

[0107] In this embodiment, the housing 41 (specifically, the main body 42) of the sanitary napkin packaging 40 uses a decorative film 50 for absorbent products with added decoration. For example... Figure 11AAs shown, the decorative film 50 includes: a film 51; an adhesive layer 52 disposed on the surface of the film 51; and a decorative layer 53 disposed on the adhesive layer 52 with a maximum thickness of 10 μm or less. Examples of decorative layer 53 include metal foil, holographic foil, pigment foil, etc. (details will be described later).

[0108] The decorative layer 53 is located in an area accessible to the user's fingers and protrudes from the surface of the film 51 in the thickness direction of the film 51. That is, the decorative layer 53 protrudes relative to the surrounding surface of the film 51 through the adhesive layer 52, which is formed in a raised manner on the surface of the film 51. Therefore, the decoration presented by the decorative layer 53 is visually recognized or touched by the user as a three-dimensional decoration. In the following description, the area where the decorative layer 53 overlaps with the adhesive layer 52 is also referred to as the "three-dimensional decorative part 54". Figure 11A , Figure 11B , Figure 12A As shown, the portion (52E) of the adhesive layer 52 that does not overlap with the decorative layer 53 is not included in the three-dimensional decorative part 54.

[0109] In this embodiment, a three-dimensional decorative portion 54 (adhesive layer 52 + decorative layer 53) is provided on the outer surface of the housing 41 of the encapsulation body 40, and the three-dimensional decorative portion 54 protrudes outward from the housing 41. The three-dimensional decorative portion 54 displays a pattern d1 of multiple curves. Figure 7 ), or show the outline of the flower, the pattern of the petals d2 ( Figure 7 ), or display the pattern d3 of sanitary napkin 1 ( Figure 7 ).

[0110] Thus, even when decorating the film 51 with a relatively thin decorative layer 53 (metal foil, holographic foil, pigment foil, etc.) with a maximum thickness of less than 10 μm, a three-dimensional decoration (three-dimensional decorative part 54) can be formed by providing the decorative layer 53 on top of the adhesive layer 52. Users who visually recognize the three-dimensional decorative part 54 provided on the storage body 41 of the packaging body 40 are more likely to perceive it as a three-dimensional product. Therefore, users are also more likely to perceive the sanitary napkin 1 stored in the storage body 41 as a product that is three-dimensionally deformed to fit the body and is less prone to leakage.

[0111] Furthermore, the minimum width W52m of the adhesive layer 52, the average fiber diameter (diameter of a single fiber) of the surface sheet 2 of the sanitary napkin 1, and the average interfiber distance of the surface sheet 2 are all set to be less than 0.4 mm. More preferably, the minimum width W52m of the adhesive layer 52 is about 0.2 mm or less. In addition, the average fiber diameter and average interfiber distance of the surface sheet 2 are preferably about 0.05 mm to 0.15 mm.

[0112] Adhesive layer 52 refers to an adhesive layer 52 on its upper surface that has at least a partial decorative layer 53. For example... Figure 13 The separate adhesive layer 55 (other adhesive layers) that does not overlap with the decorative layer 53 is not included in the adhesive layer 52 of this invention. Additionally, for example, as... Figure 11A As shown, when the adhesive layer 52 extends relative to the decorative layer 53 and the predetermined direction in the figure is the width direction, the length of the adhesive layer 52, including its protruding portion 52E, is set as the width W52 of the adhesive layer. When the minimum width W52m of the adhesive layer 52 is less than 0.4mm, the minimum width of the overlapping decorative layer 53 is also less than 0.4mm. Therefore, users who visually perceive the narrower (thinner) three-dimensional decorative portion 54 are more likely to have the impression that the product has been decorated with exquisite craftsmanship.

[0113] Furthermore, it is generally believed that the spacing between human fingerprints is approximately 460 μm (±15 μm). Humans generally perceive the texture of an object's surface based on the relationship between the distance between fingerprints and the minute irregularities on the surface. Therefore, if the minimum width W52m of the adhesive layer 52 is less than 0.4 mm, i.e., less than the spacing between fingerprints, then when a user touches the three-dimensional decorative part 54 (adhesive layer 52 and decorative layer 53), the adhesive layer 52 easily penetrates between the fingerprints. In this way, the user's tactile organs are stimulated, and the user can easily identify the product as having a three-dimensional and delicate decoration not only through sight but also through touch. Furthermore, the user is likely to have the impression that the sanitary napkin 1 stored in the storage body 41 is also a soft and delicately deformable product, like the delicate three-dimensional decorative part 54.

[0114] Furthermore, the average fiber diameter and average inter-fiber distance of the surface sheet 2 in the sanitary napkin 1 are less than 0.4 mm. Therefore, when a user touches the skin side of the surface sheet 2 while wearing the sanitary napkin 1, they can easily feel the tiny bumps and depressions formed by the fibers of the surface sheet 2 between their fingerprints. Thus, the user can clearly feel that the actual sanitary napkin 1 is also a product formed from a soft sheet of fine fibers that deforms delicately. In particular, the surface sheet 2 is located at the point where it contacts the wearer's excretory opening (e.g., the center of the sanitary napkin 1 in both the length and width directions) closest to the skin. Therefore, the user can clearly feel the softness against the skin and the comfortable wearing experience.

[0115] In other words, compared to cases where the minimum width 52mm of the adhesive layer 52, the average fiber diameter of the surface sheet 2, and the average interfiber distance of the surface sheet 2 are 0.4mm or more, the decorative film 50 and surface sheet 2 according to this embodiment can give users who visually recognize or touch the three-dimensional decorative part 54 (adhesive layer 52 and decorative layer 53) the impression that the sanitary napkin 1 is a soft and delicately deformable product. Furthermore, the three-dimensional decorative part 54 can be visually recognized or touched by users in shops displaying the package 40, restrooms storing the package 40, etc. Therefore, users who visually recognize or touch the aforementioned three-dimensional decorative part 54 before using the sanitary napkin 1 can use the sanitary napkin 1 with peace of mind.

[0116] The types of decorations displayed by the three-dimensional decoration section 54 are not particularly limited, and can include text, numbers, symbols (such as musical notes, signs, etc.), graphics (such as circles, polygons, hearts, stars, etc.), patterns (such as paintings representing the shape of objects, animals, plants, people, etc.), geometric patterns, colors (parts with a predetermined color difference relative to the color of the membrane 51), or decorations formed by combining the above decorations. Figure 7 The three-dimensional decorative part 54 shown is an example. The shape, number, size and arrangement of the three-dimensional decorative part 54 are not particularly limited.

[0117] The adhesive layer 52 is a layer formed from a raw material that is raised on the surface of the film 51 and has adhesive properties that bond the film 51 and the decorative layer 53. For example, a colorless, transparent, UV-curable adhesive is used as the raw material for forming the adhesive layer 52. However, it is not limited to this; for example, other light-curable adhesives may also be used.

[0118] Furthermore, the adhesive layer 52, which is a UV-curable adhesive, is irradiated with ultraviolet light, and the decorative layer 53 is bonded to the adhesive layer 52 by utilizing the adhesive properties of the partially cured adhesive layer 52. An example of the cross-sectional shape of the three-dimensional decorative part 54 can be shown below. Figure 11A , Figure 11B , Figure 12A as well as Figure 12B The shape shown is correct. The three-dimensional decorative part 54 shown has a length in a predetermined direction. However, the cross-sectional shape of the three-dimensional decorative part 54 is not limited to the shape shown.

[0119] Furthermore, the manufacturing method of the decorative film 50 (three-dimensional decorative part 54) will be described later, but in order to form a narrow (thin) adhesive layer 52, an inkjet device is used in this embodiment. By spraying a UV-curable adhesive from the inkjet device toward the film 51, a narrow adhesive layer 52 can be formed. In order to be sprayed from the nozzle, the viscosity of the UV-curable adhesive needs to be relatively low. On the other hand, it is necessary to make the adhesive layer 52 protrude on the substrate. Therefore, in order to prevent the adhesive layer 52 from easily penetrating into the substrate, the film 51 is used as the substrate, and the three-dimensional decorative part 54 is formed on the film 51.

[0120] The thickness of decorative layer 53 is the length in a direction orthogonal to the surface of decorative layer 53 (e.g., Figure 11A Regarding the maximum thickness (less than 10 μm) of the decorative layer 53 (in this case, the housing 41), it can be confirmed using known methods. For example, the portion of the decorative film 50 (in this case, the housing 41) where the three-dimensional decorative portion 54 is formed is identified, and multiple samples are formed by cutting this portion at any number of points. Then, the cut surface of each sample is magnified and photographed using an optical microscope (e.g., a VHX-900F manufactured by Keyence Corporation). For each photographed cut surface, the maximum thickness of the decorative layer 53 is measured. The maximum value of the maximum thickness of each sample is set as the maximum thickness of the decorative layer 53, and it is confirmed to be less than 10 μm.

[0121] The width of adhesive layer 52 is as follows. For example, in... Figure 7 and Figure 9A As shown in the curve pattern d1, the adhesive layer 52 (three-dimensional decorative part 54) extends in a linear manner, as... Figure 9B When the adhesive layer 52 (three-dimensional decorative part 54) forms the outline of a pattern (e.g., a sanitary napkin), as shown, the direction orthogonal to the direction in which the adhesive layer 52 extends is set as the width direction. Furthermore, in cases where... Figure 9C When the pattern represented by the three-dimensional decorative part 54 has linear portions (e.g., the stem portion of cotton), the direction orthogonal to the direction in which these linear portions extend is set as the width direction. Furthermore, in cases such as... Figure 9D When the pattern (e.g., a heart) represented by the three-dimensional decorative portion 54 does not have linear parts, the short side of the rectangle circumscribed by the three-dimensional decorative portion 54 in top view is defined as the width direction. The length of the adhesive layer 52 in the aforementioned width direction is defined as the width W52. Furthermore, when the adhesive layer 52 (three-dimensional decorative portion 54) is text or numbers, the thickness of the lines forming the text, etc., is defined as the width W52 of the adhesive layer 52. Then, the minimum width W52m of the adhesive layer 52 is determined from among the one or more three-dimensional decorative portions 54 of the decorative film 50. Additionally, the predetermined direction in this specification (refer to...) Figure 11A(etc.) can be either the width direction of the adhesive layer 52 or the direction intersecting the width direction.

[0122] The average fiber diameter and average interfiber distance of the surface sheet 2 can be determined using known methods. For example, a sample is obtained by cutting the surface sheet 2 from the sanitary napkin 1 into a quadrilateral shape (approximately 10mm × 10mm). In this case, a sample is obtained by cutting the surface sheet 2 under conditions where the sanitary napkin 1 is frozen using liquid nitrogen or similar methods to minimize changes in fiber diameter. Regarding the cross-section of the sample (the cross-section obtained by cutting the surface sheet 2 along its thickness direction), a magnified image is obtained using a digital microscope (e.g., a Keyence VHX-7000 or an equivalent instrument). Observing the magnified image, an arbitrary number (e.g., 100 fibers) of fiber 2f are selected, and the diameter of each fiber 2f is measured (see: Figure 10 The average fiber diameter is defined as the average fiber diameter (D1) of each fiber 2f. Furthermore, in the case of hollow fibers, the outermost dimension is defined as the diameter; in the case of flat fibers, the average of the average fiber width and average fiber thickness is defined as the diameter.

[0123] Furthermore, the outer side of fiber 2f is extracted from the magnified image obtained using a digital microscope, and the fiber space is determined. For example... Figure 10 As shown, the diameter of the largest inscribed circle of the determined fiber space is set as the fiber space distance. Select any number of fiber spaces (e.g., 100), and measure the diameter D2 of the largest inscribed circle of each fiber space. Set the average fiber space distance (D2) of all fiber spaces as the average inter-fiber distance.

[0124] Furthermore, the three-dimensional decorative part 54 can be provided at any position on the outer side of the receiving body 41 of the encapsulation body 40. Preferably, as shown below... Figure 7 As shown, it is preferable that the three-dimensional decorative part 54 is provided on the front surface 41F of the storage body 41 of the encapsulation body 40. In this way, users can easily visually identify the three-dimensional decorative part 54 in stores and the like. In addition, the front surface of the storage body 41 refers to the largest surface among the multiple surfaces of the storage body 41, the surface that prominently displays the sales name (brand name), the number of items stored, etc.

[0125] Furthermore, preferably, in the case of the package 40 having a sealing member 43, the sealing member 43 is provided on the back side 41B of the storage body 41 of the package 40, and the three-dimensional decorative part 54 is not provided on the back side 41B of the storage body 41. When the sealing member 43 is opened, the user holds the back side 41B of the storage body 41, or the pulling force of the sealing member 43 is applied to the back side 41B of the storage body 41. Therefore, by not providing the three-dimensional decorative part 54 on the back side 41B (opening cover) of the storage body 41, it is possible to prevent the three-dimensional decorative part 54 from falling off and adhering to the user or the sanitary napkin 1 when opening.

[0126] Alternatively, the three-dimensional decorative part 54 may not be provided on the packaging body 40, but rather on the sanitary napkin 1 or the individual packaging body 30. It is also possible that the three-dimensional decorative part 54 is provided not only on the packaging body 40, but also on the sanitary napkin 1 or the individual packaging body 30. In other words, the decorative film 54 can be used on at least one of the sanitary napkin 1, the individual packaging body 30, and the packaging body 40.

[0127] In the case of individual packaging 30, decorative film 50 can be used on packaging sheets 31, release sheets 33, 34, etc. Specifically, decorative film 50 can be used on packaging sheets 31, release sheets 33, 34, etc. Figure 5 The pattern d4 on the outer side of the packaging sheet 31 shown. Figure 4 The pattern d5 of the peeling sheet 34 shown is set as a three-dimensional decorative part 54. In this way, when the user takes out the individual package 30 from the package 40 or opens the individual package 30, the user can visually identify or touch the three-dimensional decorative part 54.

[0128] In the case of sanitary napkin 1, decorative film 50 can be used on the backing film 4, etc. Specifically, it can be... Figure 3 The pattern d6 on the non-skin side of the film 4 shown is designated as a three-dimensional decorative part 54. In this way, the user can visually identify or touch the three-dimensional decorative part 54 when taking the sanitary napkin out of the individual packaging 30 and putting it on underwear.

[0129] In the above-described situation, the user can visually recognize or touch the narrower (thinner) three-dimensional decorative part 54 before using the sanitary napkin 1. As a result, the user is likely to have the impression that the sanitary napkin 1 is also a soft and delicately deformable product, and can use it with peace of mind.

[0130] Furthermore, it is preferable that the decorative layer 53 is formed from any one of metal foil, holographic foil, or pigment foil. This enhances the aesthetic appeal of the three-dimensional decorative section 54. Specifically, the three-dimensional decorative section 54 formed from metal foil or holographic foil is displayed in a metallic luster such as gold or silver, making it easily eye-catching. As a result, users are more likely to visually recognize or touch the sparkling three-dimensional decorative section 54, and easily perceive the sanitary napkin 1 as having a three-dimensional or soft and delicate deformability. In addition, the metallic luster of the three-dimensional decorative section 54 also makes users more likely to perceive it as a high-end product. Therefore, users are more likely to perceive the sanitary napkin 1 stored in the storage body 41 as a high-quality product (e.g., leak-proof, comfortable to wear), and can use the sanitary napkin 1 with peace of mind. On the other hand, the three-dimensional decorative section 54 formed from pigment foil has a matte finish, which gives users the impression of a product with a stable sense of security. In addition, since it lacks a metallic luster, users are more likely to feel reassured that no foreign matter such as metal has been mixed into the stored sanitary napkin 1.

[0131] Examples of metal foils include metal foils obtained by striking metal to extend it thinly and flat, thin and flat sheets containing metal (coated films of metal powder pigments, metal vapor-deposited films), and sheets obtained by laminating resin layers on the aforementioned components. Examples of metals contained in metal foils include gold, silver, copper, tin, brass, and aluminum.

[0132] Holographic foil is a thin, flat sheet that reflects incident light in colors using a prism effect. By creating fine embossed patterns on its surface, people who see the reflected light can visually identify specific patterns.

[0133] As a pigment foil, an example is a sheet formed by laminating a pigment film onto a synthetic resin layer. The pigment color can be red, blue, yellow, black, white, etc., without particular limitation. Furthermore, the decorative layer 53 can also be a foil material other than metal foil, holographic foil, or pigment foil.

[0134] Furthermore, it is preferable that the maximum thickness of the adhesive layer 52 is greater than the maximum thickness of the decorative layer 53. For example, it is preferable that the thickness of the adhesive layer 52 is in the range of about 10 to 80 μm and the thickness of the decorative layer 53 is in the range of about 4 to 6 μm.

[0135] This allows the thinner decorative layer 53 to protrude further from the surface of the surrounding film 51. Therefore, users can easily identify cases where a three-dimensional decoration is applied. Furthermore, the adhesive layer 52 is formed from an adhesive material and is elastic. The adhesive layer 52 is relatively thick, thus increasing its elasticity. Therefore, when a user touches the three-dimensional decorative part 54, their finger is easily pushed back, making it easier to feel the texture of the three-dimensional decorative part 54. In particular, when a user touches a three-dimensional decorative part 54 with a smaller width, it is easier to tactilely identify cases where delicate decoration has been applied. On the other hand, the thinner decorative layer 53 allows it to easily deform along with the adhesive layer 52 when external force is applied, thus suppressing peeling between the two layers.

[0136] Furthermore, the maximum thickness of the adhesive layer 52 and the maximum thickness of the decorative layer 53 are determined from one or more three-dimensional decorative portions 54 of the decorative film 50. As described above, the thickness of the decorative layer 53 (e.g., Figure 11A 53t) is set as the length in a direction orthogonal to the surface of the decorative layer 53. The thickness of the adhesive layer 52 (e.g.) Figure 11A The thickness t2) is set as the length in the thickness direction of the film 51. The thickness of the adhesive layer 52 can be measured in the same way as the thickness of the decorative layer 53 by magnifying and observing the cross-section of the three-dimensional decorative part 54 using an optical microscope or the like.

[0137] Furthermore, it is preferable that the maximum thickness t3 of the three-dimensional decorative portion 54, which is the area where the decorative layer 53 overlaps with the adhesive layer 52, is (refer to...) Figure 11A The average fiber diameter of the surface sheet 2 is less than 50 μm (less than 0.05 mm).

[0138] Furthermore, the maximum thickness of the decorative film 50 is determined from one or more three-dimensional decorative portions 54. The thickness of the three-dimensional decorative portion 54 can be measured in the same way as the thickness of the decorative layer 53 by magnifying and observing the cross-section of the three-dimensional decorative portion 54 using an optical microscope or the like. The method for measuring the average fiber diameter of the surface sheet 2 is as described above.

[0139] It is generally believed that the depth of human fingerprints is less than 50 μm. Therefore, when a user touches the narrow three-dimensional decorative part 54, most of it easily enters between the fingerprints. Thus, compared to cases where the maximum thickness t3 of the three-dimensional decorative part 54 is 50 μm or more, the user can more easily identify the delicate decoration applied by touch. Similarly, when a user touches the surface sheet 2, most of the fibers of the surface sheet 2 easily enter between the fingerprints. Thus, compared to cases where the average fiber diameter of the surface sheet 2 is 50 μm or more, the user can clearly feel that the actual sanitary napkin 1 is also formed from a soft sheet of finer fibers and deforms delicately. Furthermore, by appropriately suppressing the thickness of the three-dimensional decorative part 54, peeling of the three-dimensional decorative part 54 caused by entrapment can be suppressed.

[0140] In addition, such as Figure 7 and Figure 13 As shown, the decorative film 50 may also have a separate adhesive layer 55 (other adhesive layers) independent of the three-dimensional decorative portion 54. The separate adhesive layer 55 protrudes from the surface of the film 51 and does not overlap with the decorative layer 53. When the adhesive is colorless and transparent, the visual visibility of the separate adhesive layer 55 is reduced compared to the three-dimensional decorative portion 54, but the user can appreciate the raised and recessed decoration as a different appearance. In addition, when the separate adhesive layer 55 is used to form product information (such as product name, size, function, etc.), even in dark places such as restrooms or for people with poor eyesight, the product information can be obtained by touching the separate adhesive layer 55.

[0141] In this case, it is preferable that the minimum width W55m of the individual adhesive layer 55 is less than 0.4 mm. The width W55 of the individual adhesive layer 55 is defined as the same as the width W52 of the adhesive layer 52 described above. For example, as Figure 7 As shown, when the individual adhesive layer 55 is the letter (abc), the direction orthogonal to the direction of the line extending to form the letter is set as the width direction, and the minimum width W55m is determined.

[0142] Thus, compared to cases where the minimum width W55m of a single adhesive layer 55 is 0.4mm or more, the single adhesive layer 55 easily slips between fingerprints. Therefore, users can easily identify the delicately decorated surface by touch, easily perceiving the sanitary napkin 1 as a soft and delicately deformable product. Furthermore, the tactile feel (friction) differs between the single adhesive layer 55 (where the surface is adhesive) and the three-dimensional decorative portion 54 (where the surface is decorative layer 53). Therefore, while appreciating the difference in tactile feel, users are more likely to perceive it as a meticulously crafted product due to the different decorative materials used.

[0143] In addition, such as Figure 2As shown, the sanitary napkin 1 has a pair of side sheets 6 arranged along its length at both ends of the skin-side surface of the surface sheet 2 in the width direction. In this case, it is preferable that the coefficient of kinetic friction of the skin-side surface of the surface sheet 2 is different from the coefficient of kinetic friction of the skin-side surface of the side sheets 6.

[0144] In this way, when the user touches the surface of the sanitary napkin 1, they can identify the different textures (friction) of the surface sheet 2 and the side sheet 6. Therefore, the user can clearly feel that the actual sanitary napkin 1, like the decorative film 50, is a high-performance product carefully manufactured using different materials depending on its intended use.

[0145] The method for determining the coefficient of kinetic friction can be performed using known methods, such as the following: First, the surface sheet 2 and side sheet 6, which are the objects of measurement, are cut from a sanitary napkin 1 to a predetermined size (e.g., approximately 30 mm in length and 30 mm in width) to prepare samples. Alternatively, if the sheet to be measured is separated using toluene or similar solvent, the sample is prepared after drying. Next, for each sample, the friction force is measured using the friction force detection function of an automated surface testing instrument (KESFB4-AUTO-A manufactured by Kado Technology Co., Ltd. or an equivalent instrument). As the measurement conditions, the contact area of ​​the friction contact is set to 5 mm × 5 mm (0.25 cm²). 2 The load W, including the weight of the friction contact, is set to 50 gf (approximately 0.5 N) in the vertical direction. Then, a tension of 400 g is applied to a sample width of 30 mm, and the sample is placed on an automated surface testing instrument with the object surface (the skin-like side of each piece) in contact with the friction contact. The friction contact is brought into contact with the sample under load W, and the moving speed of the friction contact is set to 1 mm / sec. The friction force F is measured, and the coefficient of kinetic friction is calculated. Then, the differences in the coefficient of kinetic friction for each sample are confirmed. Preferably, multiple samples are prepared for each object piece, and the average value of the coefficient of kinetic friction is calculated and compared.

[0146] Alternatively, the decorative film 50 may have multiple three-dimensional decorative portions 54. That is, the decorative film 50 may also have a third adhesive layer 523. Figure 11A ) and the fourth adhesive layer 524 ( Figure 11B In this case, the maximum thickness t2 of the third adhesive layer 523 may differ from the maximum thickness t4 of the fourth adhesive layer 524. The third adhesive layer 523 and the fourth adhesive layer 524 are adhesive layers 52 on which at least a decorative layer 53 is provided in a partial manner on their upper surfaces. Furthermore, the maximum thickness t2 of the third adhesive layer 523 and the maximum thickness t4 of the fourth adhesive layer 524 can be compared by magnifying and observing the cross-section of each three-dimensional decorative part 54 using an optical microscope or similar device.

[0147] In the above-described case, the user can appreciate the multiple three-dimensional decorative parts 54 with varying thicknesses. Furthermore, the user is more likely to perceive the product as a meticulously crafted item with multiple three-dimensional decorative parts 54 of varying thicknesses. The third adhesive layer 523 and the fourth adhesive layer 524 can be formed, for example, by varying the amount of adhesive (in this case, a UV-curable adhesive) sprayed toward the film 51, or by varying the number of times the adhesive is sprayed.

[0148] Furthermore, it is preferable that the average thickness of the surface sheet 2 of the sanitary napkin 1 is different from the average thickness of the side sheet 6. This way, when a user touches the surface sheet 2 and the side sheet 6 of the sanitary napkin 1, they can identify the presence of sheets with different thicknesses. Therefore, the user can clearly feel that the actual sanitary napkin 1, like the decorative film 50, is a carefully manufactured product with different thicknesses of material depending on its intended use, resulting in superior performance.

[0149] Furthermore, the average thickness of the surface sheet 2 and the side sheet 6 can be determined using known methods. For example, the object sheet is separated from the sanitary napkin 1 and cut at predetermined dimensions at any number of arbitrary points. Multiple samples are formed for each sheet. Then, the thickness of each sample is measured using a measuring instrument (e.g., a PEACOCK DIAL THICKNESS GAUGE model T06795 or an equivalent instrument). The load during measurement is set to 3 g / cm. 2 By calculating the average thickness of each sample for each piece, the average thickness of surface piece 2 and side piece 6 can be compared.

[0150] Furthermore, it is preferable that the portion of the film 51 having the three-dimensional decorative portion 54 (decorative layer 53 and adhesive layer 52) has better flexibility and higher stiffness compared to the portion of the film 51 without an adhesive forming the adhesive layer 52 (in this case, a UV-curable adhesive). Specifically, the portion of the film 51 without an adhesive layer refers to the portion of the film 51 that does not have the three-dimensional decorative portion 54 and only has an adhesive layer 55.

[0151] Bending resilience refers to the ratio of bending recovery (2HB) to stiffness (B) in the bending characteristics obtained using a bending tester (KES-FB2) developed by Jiaduo Technology; the value of 2HB / B is the difference between the bending moment during the deformation process and the bending moment during the recovery process of the membrane. If the bending resilience (2HB / B) value is low (smaller), it can be judged as having better bending resilience.

[0152] As described above, the superior flexibility of the portion of membrane 51 with the three-dimensional decorative part 54 refers to the higher elasticity of the three-dimensional decorative part 54. Furthermore, the higher stiffness of the portion of membrane 51 with the three-dimensional decorative part 54 refers to the higher rigidity of the three-dimensional decorative part 54. Therefore, when a user touches the three-dimensional decorative part 54, their finger is easily pushed back, and the shape of the three-dimensional decorative part 54 is easily maintained. Thus, the user can easily feel the tactile sensation of the three-dimensional decorative part 54. In particular, when a user touches a three-dimensional decorative part 54 with a smaller width, it is easier to tactilely identify cases where delicate decoration has been applied.

[0153] The specific methods for measuring bendability (2HB / B) and stiffness (B) are as follows. First, a sample is made by cutting out the portion of the decorative film 50 where the three-dimensional decorative part 54 is provided at a predetermined size. For example, the length in the measurement direction is set to 110 mm (ensuring 5 mm for the upper and lower portions held by a chuck), and the length in the direction orthogonal to this measurement direction is set to 100 mm. Similarly, a sample is made from the portion of the decorative film 50 where the three-dimensional decorative part 54 and the separate adhesive layer 55 are not provided. Furthermore, when the decorative film 51 is used in the housing 41 ( Figure 6A In the case where the decorative film 51 is used in the individual packaging 30 and the sanitary napkin 1, the length direction and the width direction are respectively set as the measurement directions. Samples are prepared for each of the two measurement directions.

[0154] Next, using KES-FB2 manufactured by Gato Technology Co., Ltd., the sample was fixed between chucks and bent towards the surface to the maximum curvature +2.5cm. -1 Next, bend towards the back to the maximum curvature of -2.5cm. -1 Then it recovers. Bending stiffness B[gf·cm] 2 [gf·cm / cm] is calculated based on the slope when the bending moment becomes approximately constant relative to the curvature as the bending begins to bend towards the surface. Bending resilience 2HB [gf·cm / cm] is determined based on its hysteresis magnitude.

[0155] Next, for each sample, the average value of the stiffness B in both directions and the average value of the flexural resilience 2HB in both directions were calculated. Then, it was confirmed that the average value of the stiffness B of the membrane 51 with the three-dimensional decorative portion 54 was larger (higher stiffness B). Furthermore, the flexural resilience 2HB / B was calculated by dividing the average value of the flexural resilience 2HB by the average value of the stiffness B. It was confirmed that the average value of the flexural resilience 2HB / B of the membrane 51 with the three-dimensional decorative portion 54 was smaller (better flexural resilience).

[0156] In addition, preferably, such as Figures 11A to 12B As shown, the three-dimensional decorative portion 54 (the area where the decorative layer 53 overlaps with the adhesive layer 52) has portions with varying thicknesses. For example, in... Figure 11AIn the three-dimensional decorative part 54, the central part in the predetermined direction is recessed and thinned. Figure 12A In the three-dimensional decorative part 54, the thickness of the end in the predetermined direction is thinner than the thickness of the adjacent part.

[0157] This makes it easier to visually recognize the three-dimensional decorative part 54. Consequently, users are more likely to perceive the three-dimensional decorative part 54 as a form that, like the sanitary napkin 1, deforms and conforms to the body. Furthermore, the visual appearance of the three-dimensional decorative part 54 changes depending on the angle. Therefore, users are more likely to perceive the sanitary napkin 1 as not deforming uniformly but rather conforming to the body and following its movements.

[0158] Furthermore, the tactile sensation changes depending on the thickness variation of the three-dimensional decorative part 54, making it easy for users to identify. Additionally, the width of the corners where the thickness of the three-dimensional decorative part 54 varies is smaller than the minimum width W52m of the adhesive layer 52, making it easier for fingerprints to get in. Therefore, users can easily recognize the application of a three-dimensional and delicate decoration both visually and tactilely, easily forming the impression that the sanitary napkin 1 is also a soft and delicately deformable product.

[0159] Moreover, preferably, such as Figures 11A to 12B As shown, in the three-dimensional decorative part 54, the thickness of the end portion 54E in the predetermined direction is smaller than the thickness of the portion 54I adjacent to the end portion 54E on the inner side in the predetermined direction.

[0160] In this way, the three-dimensional decorative part 54 is visually recognizable by protruding from the end 54E towards the inner side 54I in the predetermined direction, making it easier to visually identify the three-dimensional decorative part 54 in a three-dimensional way. In addition, the three-dimensional decorative part 54 can easily enter between the fingerprints of the fingers from its thinner end 54E. As a result, users can easily recognize the application of delicate decoration by touch, and easily form the impression that the sanitary napkin 1 is also a soft and delicate deformable product.

[0161] Alternatively, it could be, such as Figure 11A , Figure 12B As shown, in the three-dimensional decorative portion 54, the central portion 54C in a predetermined direction (towards the film 51 in the thickness direction) is recessed. This gives the surface of the three-dimensional decorative portion 54 a textured shape, making it easier to visually identify the three-dimensional decorative portion 54. Furthermore, the tiny protrusions (corners with varying thickness) easily slip between fingerprints. Therefore, users can easily identify areas with delicate decorations by touch.

[0162] However, it is not limited to the above situations; it can also be, for example... Figure 12A As shown, the thickness of the three-dimensional decorative part 54, except for the end in the predetermined direction, is constant. Alternatively, the central part of the three-dimensional decorative part 54 in the predetermined direction may be convex and have a larger thickness.

[0163] Alternatively, it could be, such as Figure 11A and Figure 12A As shown, the adhesive layer 52 has a protrusion 52E extending in a predetermined direction relative to the decorative layer 53. The adhesive layer 52 can extend to both sides in the predetermined direction as shown, or it can extend only to one side in the predetermined direction. When an external force is applied to the decorative film 50 (here, the housing 41), the force is easily applied to the protrusion 52E, which is the end of the adhesive layer 52. However, the adhesive layer 52 is formed from an adhesive material and is elastic, so it easily deforms along with the film 51. Therefore, it is possible to suppress the adhesive layer 52 from peeling off from the film 51. In particular, if the thickness of the protrusion 52E is small, the protrusion 52 is more likely to deform along with the film 51. For example, the maximum thickness t1 of the protrusion 52E can be made smaller than the maximum thickness t2 of the portion of the adhesive layer 52 that overlaps with the decorative layer 53 (t1 < t2). In addition, the decorative layer 53 is not located at the end where force is easily applied, thereby suppressing the peeling of the adhesive layer 52 and the decorative layer 53, and the cracking of the decorative layer 53. The visually recognizable three-dimensional decorative part 54 makes users easily perceive that sanitary napkin 1 is also a high-quality product.

[0164] However, it is not limited to the above situations; it can also be, for example... Figure 12B As shown, the adhesive layer 52 does not have a protrusion 52E. That is, the entire surface area of ​​the adhesive layer 52 may be covered by the decorative layer 53.

[0165] Furthermore, it is preferable that the length of the protrusion 52E in the predetermined direction is not too long. For example, it is preferable that the length L1 of the protrusion 52E in the predetermined direction is shorter than the length L2 of the portion of the adhesive layer 52 that overlaps with the decorative layer 53 in the predetermined direction (L1 < L2).

[0166] This ensures the aesthetic appeal (metallic sheen, etc.) produced by the decorative layer 53. Furthermore, it reduces the width of the adhesive layer 52, allowing it to easily penetrate between fingerprints. Consequently, users can easily identify areas with delicate decorations by touch.

[0167] Furthermore, the thickness and length of the various parts surrounding the three-dimensional decorative section 54 can be compared using known methods. For example, the comparison can be made by visually observing the object parts, or by comparing images taken using an optical microscope after magnifying the object parts. Alternatively, the comparison can be made based on cross-sectional images obtained by cutting the object parts.

[0168] Alternatively, it could be, such as Figure 9AAs shown, the decorative film 50 has a first adhesive layer 521 with a minimum width of less than 0.4 mm and a second adhesive layer 522 adjacent to the first adhesive layer 521. In this case, it is preferable that the minimum spacing (the distance between the outer edges of the first adhesive layer 521 and the second adhesive layer 522) P52 in the width direction of the first adhesive layer 521 is 0.47 mm or more. The first adhesive layer 521 and the second adhesive layer 522 are adhesive layers 52 on which at least a decorative layer 53 is provided at their upper surfaces.

[0169] As mentioned above, the spacing of human fingerprints is generally considered to be around 460 μm. Therefore, in the above situation, the minimum width of the first adhesive layer 521 is narrower than the spacing of the fingerprints. On the other hand, the spacing P52 between the first adhesive layer 521 and the second adhesive layer 522 is wider than the spacing of the fingerprints. Therefore, the first adhesive layer 521 can easily penetrate the fingerprints on its own. Furthermore, if the spacing between the first adhesive layer 521 and the second adhesive layer 522 is wider, the decorative layer 53 overlapping with the first adhesive layer 521 is visually recognized as a separate, narrow decorative layer. As a result, users can easily recognize the application of delicate decorations both visually and tactilely, easily forming the impression that the sanitary napkin 1 is also a soft and delicately deformable product.

[0170] Furthermore, preferably, the value (S1 / S2) obtained by dividing the total area S1 of one or more decorative layers 53 of the decorative film 50 by the planar area S2 of the film 51 is 0.8% or more and less than 6.8%. Additionally, in a piece of decorative film 50 such as Figure 6A In the case where the three-dimensional storage body 41 is formed as shown, a comparison is made when the decorative film 50 is viewed from one direction. For example, consider the following... Figure 7 The planar area of ​​the film 51 obtained by visually recognizing the encapsulation body 40 (receiving body 41) in the front-back direction is defined as S2. In addition, the total area of ​​one or more decorative layers 53 (three-dimensional decorative parts 54) provided on the front side 41F of the decorative film 50 is defined as S1.

[0171] Furthermore, in the encapsulation body 40 of this embodiment, a decorative layer 53 is provided on the front side 41F of the housing 41 where the sealing member 43 is not provided. In this case, the area of ​​the front side 41F of the housing 41 is set to the planar area S2 of the film 51. When the decorative layer 53 is provided on the back side 41B of the housing 41 where the sealing member 43 is provided, the entire area of ​​the back side 41B of the housing 41, including the area of ​​the film 51 covered by the sealing member 43, is set to the planar area S2 of the film 41.

[0172] Based on the above, compared to cases where the ratio of the area S1 of the decorative layer 53 to the planar area S2 of the film 51 is less than 0.8%, users can more easily identify the three-dimensional decorative portion 54, and the probability of users touching the three-dimensional decorative portion 54 (adhesive layer 52) is increased. Furthermore, based on the above, compared to cases where the ratio of the area S1 of the decorative layer 53 to the planar area S2 of the film 51 is 6.8% or more, it is easier to ensure the spacing of the adhesive layers 52. Therefore, individual adhesive layers 52 can easily enter between fingerprints. Additionally, the decorative layer 53 covering the narrow adhesive layer 52 is easily visually identified as a small, individual decoration. Therefore, users can easily identify cases with delicate decorations. Furthermore, the proportion of the decorative layer 53 to the film 51 is not too high, thereby suppressing the reduction of the effect produced by the three-dimensional decorative portion 54 (e.g., the sense of luxury produced by the metallic luster of local decorations).

[0173] in addition, Figure 2 The illustrated sanitary napkin 1 has an absorbent core 11 comprising a superabsorbent polymer 111. That is, the absorbent core 11 is formed by adding the superabsorbent polymer 111 to liquid-absorbent fibers such as pulp fibers and shaping it into a predetermined shape. In this case, it is preferable that the minimum width W52m of the adhesive layer 52 is smaller than the maximum particle size of the superabsorbent polymer 111 before absorbing liquid. More preferably, it is preferable that the minimum width W52m of the adhesive layer 52 is smaller than the average particle size of the superabsorbent polymer 111 before absorbing liquid.

[0174] Users who visually recognize or touch the adhesive layer 52, whose width is smaller than the maximum and average particle size of the superabsorbent polymer 111, can easily identify cases with delicate decorations. This easily gives the impression that the sanitary napkin 1 is also a soft and delicately deformable product. Furthermore, users holding the sanitary napkin 1 can feel the superabsorbent polymer 111 through the surface sheet 2 and the backing sheet 4. In particular, if the maximum and average particle size of the superabsorbent polymer is larger than the minimum width W52m of the adhesive layer 52, the user can easily perceive the presence and size of the superabsorbent polymer 111. This gives the user the impression that the superabsorbent polymer 111 reliably absorbs excrement and is less prone to leakage.

[0175] The average and maximum particle size of the superabsorbent polymer 111 can be determined by known methods. Preferably, the following measurements can be performed on multiple sanitary napkins 1, and the average of the average or maximum particle size obtained in each of the multiple measurements (e.g., N=5 times) can be compared.

[0176] (1) In a constant temperature and humidity room with a temperature of 20±5℃ and a humidity of 65±5%RH, prepare a digital microscope (trade name: VHX-1000, zoom lens: ×20~×200 or equivalent lens) and its accompanying software manufactured by Keyence.

[0177] (2) Multiple highly absorbent polymers 111 taken from the sanitary napkin 1 are left to stand in the above-mentioned constant temperature and humidity room for 24 hours.

[0178] (3) The high-absorption polymer 111 was photographed using the digital microscope described above.

[0179] (4) The particle size of each highly absorbent polymer 111 refers to the circular equivalent diameter calculated based on the projected area of ​​the projected image of each highly absorbent polymer 111. Specifically, the projected area A of each highly absorbent polymer 111 is measured using the accompanying software, and the circular equivalent diameter CD (diameter) of each highly absorbent polymer 111 is calculated (CD = 2 × (A / π)). 1 / 2 ).

[0180] (5) The average particle size of the highly absorbent polymer 111 refers to the median particle size in the particle size distribution (based on the number of particles). Specifically, the particle size distribution (based on the number of particles) of the circular equivalent diameter CD of 1000 highly absorbent polymers is generated using the accompanying software, and the median particle size is determined based on this particle size distribution (based on the number of particles) and set as the average particle size. In addition, the maximum value among the circular equivalent diameter CDs of the 1000 highly absorbent polymers calculated using the accompanying software is set as the maximum particle size.

[0181] However, the amount of excretion from the wearer of sanitary napkin 1 is less than that from the wearer of disposable diapers or absorbent pads. Therefore, the absorbent core 11 may not contain the superabsorbent polymer 111.

[0182] Alternatively, the decorative film 50 may not only have a three-dimensional decorative portion 54, but also a flat printed layer 60 provided on the surface of the film 51, i.e., a conventional printed layer 60 formed by ink printing. In this case, the three-dimensional decorative portion 54 (adhesive layer 52 and decorative layer 53) may be provided on a portion of the printed layer 60. For example, in Figure 7 In this process, a three-dimensional decorative portion 54, also a curved pattern d1, is superimposed on the printed layer 60, which is a plurality of curved patterns p1. In addition, a three-dimensional decorative portion 54 with a petal pattern d2 is superimposed on the printed layer 60, which represents the color p2 of the flower.

[0183] In this way, the raised details of the decoration displayed by the printed layer 60 are visually recognizable, allowing the user to further appreciate the decoration. Furthermore, when a specific part of the decoration is a three-dimensional decorative section 54, the three-dimensional decorative section 54 is more noticeable compared to when all the decoration is three-dimensional decorative sections 54. Therefore, users who visually recognize or touch the smaller-width three-dimensional decorative section 54 can easily identify cases where a three-dimensional and delicate decoration has been applied. Additionally, the printed layer 60 is covered by the three-dimensional decorative section 54, making the printed layer 60 less prone to peeling. Conversely, even if the three-dimensional decorative section 54 peels off from the film 51, the printed layer 60 remains visually recognizable. This helps to prevent a decrease in the appearance quality of the decorative film 50 and ensures the user's impression of the sanitary napkin 1 as being of high quality.

[0184] ===Manufacturing Method of Decorative Film 50===

[0185] Figure 14 This diagram illustrates the manufacturing method of the decorative film 50. The aforementioned decorative film 50 can utilize... Figure 14 The manufacturing apparatus 70 is used for manufacturing. The manufacturing apparatus 70 includes a conveying mechanism 71, an ink ejection device 72, an adhesive ejection device 73, a first irradiation device 74, a decorative layer conveying mechanism 75, and a second irradiation device 76.

[0186] The conveying mechanism 71 is a mechanism for conveying the continuous body 51c of the membrane 51 along the conveying direction. Examples of conveying mechanisms 71 include... Figure 14 The conveyor rollers shown, the conveyor belt (not shown), etc. The ink ejection device 72 ejects ink from the continuous body 51c of the film 51 conveyed by the conveying mechanism 71 along the conveying direction to form a flat, ordinary printed layer 60.

[0187] Downstream, the adhesive spraying device 73 sprays the adhesive forming the adhesive layer 52 directly onto the continuous body 51c of the film 51, or sprays the adhesive forming the adhesive layer 52 onto the printed layer 60. In this embodiment, a colorless and transparent ultraviolet-curable adhesive is sprayed. Then, the first irradiation device 74 irradiates the adhesive layer 52 with light (in this case, ultraviolet light) to cure it. However, the first irradiation device 74 irradiates with ultraviolet light to a degree that does not completely cure the adhesive layer 52. This ensures adhesion while fixing the shape of the adhesive layer 52. For this purpose, the intensity and irradiation time of the ultraviolet light are adjusted.

[0188] In this embodiment, an inkjet device is used as both the ink ejection device 72 and the adhesive ejection device 73 in order to form a narrow adhesive layer 52. However, the ink ejection device 72 is not particularly limited; for example, various printing methods (liquid coating methods) such as gravure printing and offset printing can be used to form the printed layer 60. Furthermore, the adhesive ejection device 73 is not limited to any ejection device capable of forming a narrow adhesive layer 52.

[0189] Subsequently, the decorative layer conveying mechanism 75 supplies the continuous body 53c of the decorative layer 53 onto the adhesive layer 52. As the decorative layer conveying mechanism 75, an apparatus having an unshown feed roller for feeding out the continuous body 53c of the decorative layer 53, a conveying roller 751, and an unshown winding roller for winding the remaining portion of the continuous body 53c of the decorative layer 53 can be illustrated.

[0190] In a direction orthogonal to the conveying direction, the length of the continuous body 53c of the decorative layer 53 is set to be greater than or equal to the length of the region where the adhesive layer 52 is formed. That is, one or more adhesive layers 52 formed on the continuous body 51c of the film 51 are completely covered by the continuous body 53c of the decorative layer 53. Furthermore, the continuous body 53c of the decorative layer 53 is supplied in contact with the surface of the adhesive layer 52. Since the adhesive layer 52 is adhesive, the continuous body 53c of the decorative layer 53 adheres to the adhesive layer 52. During this process, the continuous body 53c of the decorative layer 53 and the adhesive layer 52 are also conveyed, separating the decorative layer 53 adhered to the adhesive layer 52 from the decorative layer 53 not in contact with the adhesive layer 52. The remaining portion of the continuous body 53c of the decorative layer 53 not adhered to the adhesive layer 52 is wound onto a winding roller and recovered.

[0191] Finally, the second irradiation device 76 irradiates the adhesive layer 52 with light (in this case, ultraviolet light) to cure it, thus completely curing the adhesive layer 52 through the decorative layer 53. As a result, the adhesive layer 52 and the decorative layer 53 are firmly bonded together and integrated to form a three-dimensional decorative part 54.

[0192] According to the manufacturing method described above, a decorative layer 53 can be formed on the adhesive layer 52, creating a three-dimensional decorative portion 54 that protrudes from the surface of the film 51 in the thickness direction of the film 51. By using the decorative film 50 with the three-dimensional decorative portion 54 on any of the sanitary napkin 1, the individual packaging 30 of the sanitary napkin, and the encapsulation body 40 of the sanitary napkin, the user can be given the impression that the product has been decorated with a three-dimensional and exquisite design. However, the manufacturing method described above is just one example, and the manufacturing method of the decorative film 50 is not particularly limited.

[0193] The above-described embodiments are provided for easy understanding of this utility model and are not intended to limit its interpretation. It is self-evident that this utility model can be modified and improved without departing from its spirit, and that it includes equivalents.

Claims

1. A decorative film for absorbent products, characterized in that, The decorative film for absorbent products is used on any of the following: absorbent articles, individual packaging of absorbent articles, and encapsulation of absorbent articles, and is used to apply decoration. The decorative film used in this absorbent product has the following characteristics: membrane; An adhesive layer is disposed on the surface of the membrane; and A decorative layer, disposed above the adhesive layer, has a maximum thickness of less than 10 μm. The decorative layer is located in an area accessible to the user's fingers and protrudes from the surface of the film in the thickness direction of the film. The minimum width of the adhesive layer, the average fiber diameter of the surface sheets of the absorbent article, and the average interfiber distance of the surface sheets are all less than 0.4 mm.

2. The decorative film for absorbent products according to claim 1, characterized in that, The maximum thickness of the adhesive layer is greater than the maximum thickness of the decorative layer.

3. The decorative film for absorbent products according to claim 1 or 2, characterized in that, The maximum thickness of the overlapping portion of the decorative layer and the adhesive layer and the average fiber diameter of the surface sheet are less than 50 μm.

4. The decorative film for absorbent products according to claim 1 or 2, characterized in that, The decorative film used in this absorbent product has additional adhesive layers that protrude from the surface of the film and do not overlap with the decorative layer. The minimum width of the other adhesive layers is less than 0.4 mm. The absorbent article has a width direction and a length direction, and at both ends of the surface sheet on the skin side in the width direction, there are a pair of side pieces arranged along the length direction. The coefficient of kinetic friction of the skin side surface of the surface sheet is different from that of the skin side surface of the side sheet.

5. The decorative film for absorbent products according to claim 1 or 2, characterized in that, For the portion of the membrane having the decorative layer and the adhesive layer, compared to the portion of the membrane without adhesive forming the adhesive layer, it has better flexibility and higher stiffness.

6. The decorative film for absorbent products according to claim 1 or 2, characterized in that, The overlapping areas of the decorative layer and the adhesive layer have different thicknesses.

7. The decorative film for absorbent products according to claim 6, characterized in that, At the location where the decorative layer overlaps with the adhesive layer, the thickness of the end in a predetermined direction is smaller than the thickness of the portion adjacent to that end on the inner side of the predetermined direction.

8. The decorative film for absorbent products according to claim 1 or 2, characterized in that, The decorative layer is formed from any one of metal foil, holographic foil, or pigment foil.

9. The decorative film for absorbent products according to claim 1 or 2, characterized in that, The decorative film for this absorbent product has a first adhesive layer with a minimum width of less than 0.4 mm and a second adhesive layer adjacent to the first adhesive layer. In the width direction of the first adhesive layer, the minimum spacing between the first adhesive layer and the second adhesive layer is 0.47 mm or more. The value obtained by dividing the total area of ​​one or more of the decorative layers by the planar area of ​​the film is greater than 0.8% and less than 6.8%.

10. The decorative film for absorbent products according to claim 1 or 2, characterized in that, The absorbent article has an absorbent core comprising a highly absorbent polymer. The minimum width of the adhesive layer is smaller than the maximum particle size of the highly absorbent polymer.

11. The decorative film for absorbent products according to claim 10, characterized in that, The minimum width of the adhesive layer is smaller than the average particle size of the highly absorbent polymer.

12. The decorative film for absorbent products according to claim 1 or 2, characterized in that, The decorative film used in this absorbent product has a third adhesive layer and a fourth adhesive layer. The maximum thickness of the third adhesive layer is different from the maximum thickness of the fourth adhesive layer. The absorbent article has a width direction and a length direction, and at both ends of the surface sheet on the skin side in the width direction, there are a pair of side pieces arranged along the length direction. The average thickness of the surface sheet is different from the average thickness of the side sheet.

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