Skin care sheets

Abstract

In a skin care sheet with concave and convex portions, the wiping performance of foreign objects on the skin surface is improved. The skin care sheet (1) has a non-woven fabric layer (10) disposed on its surface, and has a first direction (DA) and a second direction (DB) that are orthogonal to each other when viewed from above. A convex portion (11) and a concave portion (12) that is recessed towards the back side compared to the convex portion are formed in the non-woven fabric layer (10). The concave portion (12) has a wavy row of portions (13) that extends along the first direction (DA) when viewed from above. A plurality of rows of portions are arranged at intervals in the second direction (DB).

Description

Technical Field

[0001] This invention relates to a skin care sheet that is used in contact with the skin. Background Technology

[0002] Patent Document 1 discloses a skin care sheet for contact with the skin. The skin care sheet in Patent Document 1 undergoes embossing or other processing to easily maintain its shape. The embossed sheet has raised and recessed portions, which differs from a flat sheet without raised and recessed portions in the movement of foreign objects on the skin surface. More specifically, when a flat sheet is brought into contact with and moved against the skin, foreign objects (dirt, dust) wiped by the sheet may remain directly on the sheet, potentially making it impossible to wipe them away. However, in the sheet with raised and recessed portions, foreign objects contacting the raised portions are easily wiped away by guiding them towards the recessed portions.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2006-288604 Summary of the Invention

[0006] However, depending on the arrangement of the recesses and protrusions, it may be impossible to adequately wipe away foreign objects, or foreign objects temporarily guided to the recesses may move back towards the skin. For example, in a design where multiple protrusions and recesses are formed at intervals throughout the sheet, when the sheet is brought into contact with and moved against the skin, foreign objects on the skin surface that are in contact with the protrusions may be temporarily guided to the recesses. However, in a design where the receiving space of the recesses cannot be adequately ensured, or where foreign objects can easily move from the recesses to the protrusions, there is a possibility that foreign objects temporarily guided to the recesses may move back towards the skin. In other words, there is room for improvement regarding the shape of the recesses and protrusions.

[0007] The present invention was made in view of the following problem, and its object is to improve the wiping performance of foreign objects on the skin surface in a skin care sheet having concave and convex portions.

[0008] One type of skin care sheet has a nonwoven fabric layer disposed on its surface, and has a first direction and a second direction that are orthogonal to each other when viewed from above. The nonwoven fabric layer has protrusions and recesses that are recessed towards the back side than the protrusions. The recesses have wavy rows extending along the first direction when viewed from above. Multiple rows are arranged at intervals in the second direction. Attached Figure Description

[0009] Figure 1 This is a top view taken from the surface side of the skin care sheet as described in the embodiment.

[0010] Figure 2 yes Figure 1 A magnified view of a portion of the skincare sheet shown.

[0011] Figure 3 yes Figure 2 An enlarged view of section X shown.

[0012] Figure 4 It is along Figure 3 A schematic cross-sectional view of line AA shown. Detailed Implementation

[0013] (1) Overview of the implementation method

[0014] Based on the description in this specification and the accompanying drawings, at least the following matters can be clarified.

[0015] One type of skin care sheet has a nonwoven fabric layer disposed on its surface, and has a first direction and a second direction that are orthogonal to each other when viewed from above. The nonwoven fabric layer has protrusions and recesses that are recessed towards the back side of the protrusions. The recesses have a wavy column extending along the first direction when viewed from above. Multiple columns are arranged at intervals along the second direction. When the skin care sheet is moved while in contact with the skin, foreign matter (dirt, dust) on the skin surface in contact with the protrusions can be guided to the recesses. At this time, because the recesses extend in a wavy shape, compared to recesses arranged intermittently such as dots, foreign matter can diffuse within the recesses, making it easier to continuously introduce foreign matter into the recesses and preventing foreign matter from moving back towards the protrusions. Furthermore, in a case where the recesses are arranged in a straight line, if the sheet is moved along the recesses, foreign matter moves along both the recesses and the protrusions, making it difficult to introduce foreign matter from the protrusions to the recesses. However, because the recesses are configured in a wavy shape, for example, whether the sheet is moved along a first direction or a second direction, the convex and concave portions alternately abut, allowing foreign matter to be introduced from the convex side to the concave side. Furthermore, in sheets with both recesses and convex portions, the rigidity of the recesses and convex portions sometimes differs due to the difference in the basis weight or density of the fibers. Even in cases where the rigidity of the recesses and convex portions differs, compared to sheets with point-like or straight recesses, forces can be dispersed, making it difficult to form bending points caused by force differences, and thus suppressing sheet torsion.

[0016] According to a preferred embodiment, the protrusion is formed by a region sandwiched between the wave-shaped columns. The protrusion is not a point-like region, but rather a surface region sandwiched between the wave-shaped columns. According to this embodiment, compared to a sheet without concave or convex portions, reducing the contact area reduces the contact pressure on the skin and improves the skin feel. Furthermore, in sheets with dot-shaped protrusions, the extremely small surface area of ​​the protrusions raises concerns about increased contact pressure on the skin. However, compared to sheets with dot-shaped protrusions, reducing the contact area reduces the contact pressure on the skin and improves the skin feel.

[0017] According to a preferred embodiment, the column portion is continuous in the first direction. According to this embodiment, because the column portion is continuous in the first direction, when wiping along the second direction, the foreign object will inevitably come into contact with the recess. By introducing the foreign object into the recess and wiping with the foreign object remaining on the protrusion, the undesirable situation of the foreign object extending onto the protrusion can be suppressed.

[0018] According to a preferred embodiment, the wave shape of the column portion is composed of a first portion extending to one side of the first direction and to one side of the second direction, a second portion extending to one side of the first direction and to the other side of the second direction, and a third portion connecting the first portion and the second portion. The third portion is curved. According to this embodiment, since the first portion and the second portion extend in opposite directions in the second direction, foreign objects introduced into the recess can be guided in various directions. In addition, since the first portion and the second portion extend in opposite directions to each other in the second direction, the force applied to the recess can be dispersed, and the concentration of local force can be suppressed. Furthermore, since the third portion connecting the first portion and the second portion is curved, corners where straight lines intersect are not formed, and the retention of foreign objects in the third portion can be suppressed.

[0019] According to a preferred embodiment, the column portion has a first column portion and a second column portion adjacent to the first column portion in the second direction. The phase of the wave shape of the first column portion is offset from the phase of the wave shape of the second column portion. In the configuration where the phase of the wave shape of the first column portion and the phase of the wave shape of the second column portion are the same, and the first and second column portions are arranged parallel to each other, the length of the region in the second direction between the first and second column portions is uniform. However, in the configuration where the phase of the wave shape of the first column portion and the phase of the wave shape of the second column portion are different, the length of the region in the second direction between the first and second column portions is not uniform. When wiping along the direction of the wave shape, due to the existence of narrow regions and wide regions between the columns, dirt is easily guided into the recesses without spreading out.

[0020] According to a preferred embodiment, the interval between the first column and the second column in the second direction is shortest at the portion where the third portions of the first column and the third portions of the second column face each other. According to this embodiment, because the interval between the first column and the second column in the second direction changes, foreign objects on the protrusions can be gradually guided into the recess while being introduced into the recess, gradually moving to the narrower region between the protrusions, and finally guided to the region with the narrowest interval (the portion where the third portions face each other), thus introducing the foreign object into the recess adjacent to that region.

[0021] According to a preferred embodiment, the shortest interval between the first column and the second column in the second direction is greater than or equal to the width of the recess and less than or equal to half the length of each column in the second direction. If the shortest interval is shorter than the width of the recess, the protrusions forming the interval are prone to tipping over due to the recesses spaced apart, making it difficult to maintain their shape. However, since the shortest interval is greater than or equal to the width of the recess, it is easier to maintain the shape of the protrusions. Furthermore, since the shortest interval is less than or equal to half the length of the column in the second direction, it is easier to achieve the effect of suppressing excessive emptiness between the columns and concentrating and guiding foreign objects into the recesses.

[0022] According to a preferred embodiment, the angle between the first portion and the second portion, which are positioned to sandwich the third portion, is an obtuse angle. According to this embodiment, compared to a structure where the angle between the first portion and the second portion is acute, the length extending along the first direction in the recess can be longer than the length extending along the second direction. This facilitates the guidance of foreign objects in the direction of the column extension, promotes the diffusion of foreign objects in the recess, and enables the continuous introduction of foreign objects into the recess.

[0023] According to a preferred embodiment, the basis weight of the fibers in the convex portion can be higher than that in the concave portion. The convex portion protrudes more, making it easier to contact the skin and foreign objects. By increasing the basis weight of the convex portion, the pressure applied by the hand during wiping is weakened, making it less likely to be directly transmitted to the skin, thus improving the skin feel.

[0024] According to a preferred embodiment, a fine recess, shallower than the depth of the recess, is formed in the protrusion. This fine recess allows for the introduction of minute foreign objects. Furthermore, the fine recess increases the surface area of ​​the wiper during cleaning, further improving its cleaning performance.

[0025] (2) Overall structure of skin care sheets

[0026] Hereinafter, the skin care sheet according to the embodiment will be described with reference to the accompanying drawings. Furthermore, in the following description of the drawings, the same or similar parts will be labeled with the same or similar reference numerals. However, the drawings are schematic, and attention should be paid to the differences between the proportions and other dimensions and reality. Therefore, specific dimensions should be determined by referring to the following description. Additionally, the drawings may contain parts with different dimensional relationships and proportions.

[0027] Figure 1 This is a top view of the skin care sheet 1 as described in the embodiment, viewed from the surface side. Figure 2 yes Figure 1 A magnified view of a portion of the skincare patch 1 shown. Figure 3 yes Figure 2 An enlarged view of part X of the skincare patch 1 shown. Figure 4 It is along Figure 3 The diagram shows a schematic cross-sectional view along line AA. The skincare sheet 1 is a sheet used in contact with the user's skin; it can be a sheet for the face or body. Furthermore, the skincare sheet 1 can be a dry sheet or a wet sheet. In this embodiment, the wet sheet is a wiping sheet used to wipe the area near the excretory opening of an infant. The skincare sheet 1 has a first direction DA and a second direction DB extending in a planar direction and orthogonal to each other. The first direction DA can be the direction in which the column extends, as described later. In a rectangular skincare sheet 1, one of the first direction DA and the second direction DB can be the length direction, and the other direction can be the width direction. In a square skincare sheet 1, the length of the first direction DA and the length of the second direction DB can be the same. The first direction DA extends to one side DA1 and to the other side DA2 opposite to one side DA1. The second direction DB extends to one side DB1 and to the other side DB2 opposite to one side DB1.

[0028] The skin care sheet 1 has a non-woven fabric layer 10. The skin care sheet 1 may consist of only one non-woven fabric layer 10, or it may have multiple non-woven fabric layers 10, or it may be a laminate of non-woven fabric layers 10 and other sheets. In this embodiment, the skin care sheet 1 consists of a single non-woven fabric layer 10. The non-woven fabric layer 10 may contain synthetic fibers (polyethylene terephthalate rayon) and natural fibers (rayon).

[0029] (3) Detailed structure of the convex and concave parts

[0030] The nonwoven fabric layer 10 of the skin care sheet 1 of this embodiment has a recess 12 and a protrusion 11 to improve the wiping performance of foreign objects on the skin surface. Next, the structure of the recess 12 and the protrusion 11 will be described in detail. The protrusion 11 and the recess 12 are formed on at least one layer of nonwoven fabric 10. The protrusion 11 and the recess 12 are disposed on the outer surface (surface or back surface) of the skin care sheet 1. The protrusion 11 has the thickest portion of the nonwoven fabric layer 10. In this embodiment, the protrusion 11 is configured in a planar shape. The area of ​​the protrusion 11 may also be the area other than the area where the recess 12 is processed. The area of ​​the protrusion 11 is larger than the area of ​​the recess 12. The protrusion 11 has the thinnest portion of the nonwoven fabric layer 10.

[0031] The recess 12 has a wavy column of portions 13 extending in the first direction DA when viewed from above. The column of portions 13 may extend at least in the first direction DA, and may extend in the first direction DA while being inclined relative to the first direction DA (also extending in the second direction DB). The column of portions 13 may be arranged at intervals in the second direction DB. Alternatively, the recess 12 may consist only of the column of portions 13, or it may have portions other than the column of portions 13. For example, a fine recess 14 (described later) shallower than the recess 12 may be formed in the protrusion 11. Furthermore, in this embodiment, the structure extending along the first direction DA includes not only structures parallel to the first direction DA, but also structures with an angle of 45 degrees or less relative to the first direction DA. Similarly, the structure extending in the second direction DB includes not only structures parallel to the second direction DB, but also structures extending in the second direction DB at an angle less than 45 degrees.

[0032] According to the skin care sheet 1 configured in this way, since at least one of the surface and back sides of the skin care sheet 1 is provided with a protrusion 11 and a recess 12, the protrusion 11 and the recess 12 come into contact with the user's skin. When the skin care sheet 1 is moved while in contact with the skin, foreign matter (dirt, dust) on the skin surface in contact with the protrusion 11 can be guided to the recess 12. At this time, since the recess 12 extends in a wavy shape, compared with the recess 12 arranged intermittently in the form of dots, foreign matter can diffuse within the recess 12, making it easier to continuously introduce foreign matter into the recess 12, and preventing foreign matter from moving back to the protrusion 11 side. In addition, if the recess 12 is arranged in a straight line, if the sheet 1 is moved parallel to the direction in which the recess 12 extends, foreign matter moves along the recess 12 and the protrusion 11, making it difficult to introduce foreign matter from the protrusion 11 side to the recess 12 side. However, since the recess 12 is configured in a wave shape, for example, whether the sheet 1 is moved along the first direction DA or the second direction DB, the protrusion 11 and the recess 12 are in alternating contact, allowing foreign matter to be introduced from the protrusion 11 side to the recess 12 side. Furthermore, in a sheet 1 having both a recess 12 and a protrusion 11, the rigidity of the recess 12 and the rigidity of the protrusion 11 sometimes differs due to the difference in the basis weight or density of the fibers in the recess 12 and the protrusion 11. Even in the case where the rigidity of the recess 12 and the rigidity of the protrusion 11 differ, compared to a sheet having a dotted or straight recess 12, the force can be dispersed, making it difficult to form a bending point caused by the force difference, and thus suppressing sheet torsion.

[0033] Here, the arrangement of the column portions 13 at intervals in the second direction DB requires only that at least a portion of adjacent column portions 13 be separated, although adjacent column portions 13 may also be partially connected. Preferably, the entire area of ​​adjacent column portions 13 can be separated from each other. For example, if the column portions 13 are connected, the force may concentrate at that connected area. However, by separating the entire area of ​​the column portions 13, the area between the column portions 13 functions as an interference region, which can disperse the force propagating along the column portions 13 and suppress the torsion of the sheet caused by local force concentration.

[0034] The protrusion 11 can be formed by a region sandwiched between the wave-shaped columns 13. That is, the protrusion 11 can also be formed by a region other than the columns 13. In this method, the protrusion 11 is not a point-like region, but a surface region sandwiched between the wave-shaped columns 13. The protrusion 11 can be continuously provided in the first direction DA. According to this method, compared with a sheet without concave and convex portions, by reducing the contact area, the contact pressure on the skin can be reduced, and the skin feel can be improved. In addition, in a sheet with point-like protrusions, since the surface area of ​​the protrusions is extremely small, there is a concern that the contact pressure on the skin will increase. However, compared with a sheet with point-like protrusions, by reducing the contact area, the contact pressure on the skin can be reduced, and the skin feel can be improved.

[0035] The column portion 13 only needs to have a continuous portion in the first direction DA. It can be continuous between the two ends of the nonwoven layer 10 in the first direction DA, or it can have a partially discontinuous portion. In addition, the length of the discontinuous portion of the column portion 13 can be less than or equal to the width of the column portion. According to this structure, it has a discontinuous portion and is easy to function as a continuous column portion in practice. In addition, it is preferable that the column portion 13 is continuous in the first direction DA. By making the column portion 13 continuous in the first direction DA, when wiping along the second direction DB, foreign matter will definitely come into contact with the recess 12, and the undesirable situation that foreign matter stretches on the protrusion 11 due to the foreign matter being introduced into the recess 12 and then being wiped with the foreign matter remaining on the protrusion 11 can be suppressed.

[0036] like Figure 3 As shown, the wave shape of column 13 can be composed of a first portion 31 extending towards one side DA1 in the first direction DA and towards one side DB1 in the second direction DB, a second portion 32 extending towards one side DA1 in the first direction DA and towards the other side DB2 in the second direction DB, and a third portion 33 connecting the first portion 31 and the second portion 32. Column 13 is arranged in the first direction DA in the order of the first portion 31, the third portion 33, and the second portion 32. More specifically, the third portion 33 has a third left portion 331 bulging towards one side of the second direction DB (the left side in the main view), and a third right portion 332 bulging towards the other side of the second direction DB (the right side in the main view). The third left portion 331 and the third right portion 332 are alternately arranged within the same column 13, forming a wave shape in which the portion bulging towards one side DB1 in the second direction DB and the portion bulging towards the other side DB2 in the second direction DB are alternately arranged. Figure 2 As shown, from one side DA1 of the first direction DA to the other side DA2, the portions are arranged in the order of first part 31, third left part 331, second part 32, and third right part 332, and are repeatedly arranged in the first direction DA. This forms a regular wave shape. The length of the second direction DB of the first part 31 can be the same as the length of the second direction DB of the second part 32. Furthermore, the length of the first direction DA of the first part 31 can be the same as the length of the first direction DA of the second part 32.

[0037] Since the first portion 31 and the second portion 32 extend in opposite directions to the second direction DB, foreign objects introduced into the recess 12 can be guided in various directions. Furthermore, since the first portion 31 and the second portion 32 extend in opposite directions to the second direction DB, the force applied to the recess 12 can be dispersed, suppressing localized force concentration. The third portion 33 can also be a straight line with a corner. Preferably, the third portion 33 can be curved. By making the third portion 33 connecting the first portion 31 and the second portion 32 curved, corners where straight lines intersect are not formed, thus suppressing the retention of foreign objects in the third portion 33.

[0038] Column 13 may have a first column 21 and a second column 22 adjacent to the first column 21 in the second direction DB. Additionally, column 13 may also have a third column 23 adjacent to the first column 21 in the second direction DB. The third column 23 is disposed on the opposite side of the second column 22, with reference to the first column 21. That is, the first column 21 is disposed between the second column 22 and the third column 23. The phase of the wave shape of the first column 21 may be offset from the phase of the wave shape of the second column 22, and the phase of the wave shape of the first column 21 and the phase of the wave shape of the third column 23 may also be offset. The phase of the wave shape of the second column 22 and the phase of the wave shape of the third column 23 may be the same. Here, the phase of the wave shape is staggered, for example, by the portion of the first column 21 that bulges towards the second direction DB (the third right portion 332) and the portion of the second column 22 that bulges towards the second direction DB (the third right portion 332) are not adjacent and are staggered in the first direction. More preferably, the third right portion 332 of the first column 21 and the third left portion 331 of the second column 22 are arranged on the extension line of the second direction, that is, the first column 21 and the second column 22 are linearly symmetrical about a straight line extending along the first direction between them. When the phase of the wave shape of the first column 21 and the phase of the wave shape of the second column 22 are the same, the length of the second direction DB of the region sandwiched between the first column 21 and the second column 22 is uniform. However, when the phase of the wave shape of the first column 21 and the phase of the wave shape of the second column 22 are different, the length of the second direction DB of the region sandwiched between the first column 21 and the second column 22 is not uniform. When wiping along the wavy direction, the dirt is easily guided into the recesses without stretching due to the narrow areas between the columns.

[0039] Furthermore, the first portion 31 of the first column 21 and the second portion 32 of the second column 22 can be adjacent. In other words, the second portion 32 of the second column 22 can be arranged on the extension line of the second direction DB of the first portion 31 of the first column 21. Additionally, the third left portion 331 of the first column can be adjacent to the third right portion 332 of the second column 22, and the third right portion 332 of the first column 21 can be adjacent to the third left portion 331 of the second column 22. The length of the first direction DA of the first portion 31 can be longer than the length of the second direction DB of the first portion 31, and the length of the first direction DA of the second portion 32 can be longer than the length of the second direction DB of the second portion DB. According to this structure, the region sandwiched between the first column 21 and the second column 22 forms a rhombus. The interval on the second direction DB of the first column 21 and the second column 22 can be shortest at the portion where the third portion of the first column and the third portion of the second column face each other. More specifically, as... Figure 3 As shown, the interval G11 is shortest in the portion where the third right portion 332 of the first column 21 faces the third left portion 331 of the second column 22, and the interval G12 is longest in the portion where the third left portion 331 of the first column 21 faces the third right portion 332 of the second column 22. Because the interval in the second direction DB of the first column 21 and the second column 22 changes, foreign objects on the protrusions 11 can be gradually guided into the recesses 12 while being introduced into the recesses, gradually reaching the narrowest area between the protrusions 11, and finally being guided into the region with the narrowest interval, thus introducing the foreign object into the recess 12 adjacent to that region.

[0040] The shortest interval G11 on the second direction DB of the first column 21 and the second column 22 can be greater than or equal to the width W12 of the recess 12, and is also equal to the length L132 of the second direction DB of each column 13 (see reference). Figure 3The shortest interval G11 is less than half the width W12 of the recess 12. If the shortest interval G11 is shorter than the width W12 of the recess 12, the protrusion 11 constituting the interval G11 is prone to tipping over due to the recess 12 being arranged with the interval G11 in between, and it is sometimes difficult to maintain the shape of the protrusion 11. However, since the shortest interval G11 is greater than or equal to the width W12 of the recess 12, it is easier to maintain the shape of the protrusion 11. In addition, since the shortest interval G11 is less than half the length L132 of the second direction DB of the column 13, it is easier to suppress the area between each column 13 from being too empty, and it is easier to obtain the effect of concentrating foreign objects and guiding them towards the recess 12. The length L132 of the second direction DB of the column 13 is the distance between the two ends of the second direction DB of the column 13 (the distance between the left end edge of the third left portion and the right end edge of the third right portion). In addition, the longest interval G12 of the first column 21 and the second column 22 in the second direction DB can be 20 mm or less. Since the spacing of the protrusions 11 in the second direction DB is 20 mm or less, foreign objects can easily come into contact with the protrusions 11, thus improving wiping performance. Furthermore, the length of one side of the rhombus in the first direction DA (e.g., the spacing between the third portions in the first direction DA) can be 20 mm or less. According to this structure, foreign objects can also easily come into contact with the protrusions 11, further improving wiping performance.

[0041] like Figure 3 As shown, the angle θ between the first part 31 and the second part 32, which are sandwiched by the third part 33, can be an obtuse angle. Compared to a structure where the angle θ between the first part 31 and the second part 32 is an acute angle, in the recess 12, the length extending along the first direction DA can be longer than the length extending along the second direction DB. This facilitates the guidance of foreign objects in the direction in which the column part 13 extends, promotes the diffusion of foreign objects in the recess 12, and enables the continuous introduction of foreign objects into the recess 12.

[0042] In this embodiment, the recess 12 is formed from a protrusion provided on the surface of a roller-shaped member processing the nonwoven fabric. By moving the fibers corresponding to the recess 12 to the surrounding area during its formation, the basis weight of the fibers in the protrusion 11 can be higher than that in the recess 12. The protrusion protrudes more than the recess, making it easier to contact the skin and foreign objects. By increasing the basis weight of the protrusion, the pressure applied by the hand during wiping is weakened, making it difficult to directly transmit pressure to the skin, thus improving the skin feel. The fiber density of the protrusion 11 can be approximately the same as that of the recess 12. Because there is almost no density difference between the protrusion 11 and the recess 12, the movement of body fluids caused by the density gradient can be suppressed, allowing body fluids to diffuse throughout the sheet, thus improving wiping performance. Alternatively, the recess 12 can be formed by embossing, in which the portion corresponding to the recess 12 is compressed during its formation, the basis weight of the fibers in the recess 12 is approximately the same as that of the fibers in the protrusion, and the fiber density in the recess 12 is higher than that in the protrusion. like Figure 4As shown, the protrusions 11 and the recesses 12 may be provided only on the surface of the nonwoven fabric layer 10 (the side located on the outer side of the skin care sheet 1), and not on the back side of the nonwoven fabric layer 10.

[0043] The fiber orientation of the nonwoven layer 10 can be along the second direction DB. Foreign matter can be guided by the fibers in a manner that allows them to be positioned between adjacent rows 13, thus preventing foreign matter residue from remaining between the rows 13. Furthermore, depending on the user, the skin care sheet 1 is sometimes used folded instead of unfolded. In this case, by aligning the direction of the wiping sheet parallel to the fiber orientation of the nonwoven fabric, wiping is easier, and foreign matter is easily guided to the recesses of the rows.

[0044] Multiple skincare sheets 1 are typically stacked in a folded state and housed within a package before use. The creases on the sheets can extend in the second direction DB. This structure allows foreign matter to be guided through the creases in a manner that positions it between adjacent columns 13, preventing foreign matter from remaining between the columns 13. Alternatively, it can extend along the first direction DA of the columns 13. This structure facilitates the guidance of foreign matter such as excrement along the first direction DA using the creases.

[0045] A shallower micro-recess 14 than the recess 12 can be formed on the protrusion 11. The depth F14 of the micro-recess is shallower than the depth F12 of the recess 12. The micro-recess 14 can be dot-shaped and arranged at intervals in the first direction DA and the second direction DB. Through this micro-recess 14, fine foreign objects can be introduced. In addition, the surface area of ​​the wiping pad 1 can be increased by the micro-recess 14, further improving the wiping performance.

[0046] The present invention has been described in detail above using the embodiments described above. However, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented in modified and altered ways without departing from the spirit and scope of the invention as defined by the claims. Therefore, the description in this specification is for illustrative purposes only and is not intended to limit the present invention in any way.

[0047] Furthermore, the entire contents of Japanese Patent Application No. 2020-142120, filed on August 25, 2020, are incorporated herein by reference.

[0048] Industrial utilization potential

[0049] According to this method, a skin care sheet with concave and convex portions can be provided, which can improve the wiping performance of foreign objects on the skin surface.

[0050] Explanation of reference numerals in the attached figures

[0051] 1: Skin care sheet; 10: Non-woven fabric layer; 11: Convex part; 12: Concave part; 13: Column part; 14: Micro-concave part; 21: First column part; 22: Second column part; 23: Third column part; 31: First part; 32: Second part; 33: Third part; DA: First direction; DB: Second direction.

Claims

1. A skin care sheet comprising a nonwoven fabric layer disposed on its surface, and having a first direction and a second direction orthogonal to each other when viewed from above, characterized in that, The nonwoven fabric layer has protrusions and recesses that are recessed towards the back side compared to the protrusions. The recess has a wave-shaped column that extends along the first direction when viewed from above. The column portion is arranged in a plurality of spaces at intervals in the second direction. The fiber density of the convex portion is the same as that of the fiber density of the concave portion, and the basis weight of the fiber of the convex portion is higher than that of the fiber of the concave portion.

2. The skin care sheet according to claim 1, characterized in that, The skin care sheet is composed of one layer of non-woven fabric.

3. The skin care sheet according to claim 1 or 2, characterized in that, The convex portion is formed by the region sandwiched between the wave-shaped column portion.

4. The skin care sheet according to claim 1 or 2, characterized in that, The column portion is continuous in the first direction.

5. The skin care sheet according to claim 1 or 2, characterized in that, The wave shape of the column portion is composed of a first portion extending to one side in the first direction and to one side in the second direction, a second portion extending to one side in the first direction and to the other side in the second direction, and a third portion connecting the first portion and the second portion. The third part is curved.

6. The skin care sheet according to claim 5, characterized in that, The column portion has a first column portion and a second column portion adjacent to the first column portion in the second direction. The phase of the wave shape in the first column is offset from the phase of the wave shape in the second column.

7. The skin care sheet according to claim 6, characterized in that, The interval between the first column and the second column in the second direction is shortest at the portion of the third part of the first column that faces the third part of the second column.

8. The skin care sheet according to claim 7, characterized in that, The shortest interval between the first column and the second column in the second direction is greater than or equal to the width of the recess and less than or equal to half the length of each column in the second direction.

9. The skin care sheet according to claim 5, characterized in that, The angle between the first part and the second part, which are sandwiched between the third part, is an obtuse angle.

10. The skin care sheet according to claim 1 or 2, characterized in that, The protrusion has a shallower micro-recess than the recess.

11. The skin care sheet according to claim 10, characterized in that, The fine recesses are dot-shaped.

Images