JP2021116177A - Case, dispenser and adhesive sheet - Google Patents

Abstract

To provide a case, a dispenser and an adhesive sheet which can be easily positioned on an object and can be repeatedly stuck and released.SOLUTION: A case comprises a case body for storing an article, and an adhesive sheet 10 disposed on an outer surface of the case body. The adhesive sheet has an adhesive layer 12 having a microstructure 13 on its surface. A surface opposite to the surface of the adhesive layer faces the outside. The microstructure contains a plurality of convex structures. The convex structure has two or more portions. A first portion 4, which is present at the apex 2 of the convex structure, is made of a non-adhesive or a first adhesive material. A second portion 5, which is farther away from the apex than the first portion, is made of a second adhesive material having a higher adhesion than the material of the first portion.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to cases, dispensers and adhesive sheets.

Patent Document 1 discloses a dispenser for a tape or a sheet. According to this dispenser, the tape or sheet contained in the dispenser can be taken out from the outlet of the dispenser.

Japanese Unexamined Patent Publication No. 7-149380

When the tape or sheet is taken out from the outlet of the dispenser, double-sided tape may be attached to the bottom surface of the dispenser so that the dispenser does not lift up together with the tape or sheet. In this case, the dispenser can be adhered to the desk with double-sided tape. However, it is difficult to adjust the position with the adhesive double-sided tape, and it is difficult to repeat the operation of adhering the dispenser to the desk, then re-peeling the dispenser from the desk and reattaching it to another place. The dispenser is an example of a case for accommodating an article.

One aspect of the present disclosure is to provide a case, a dispenser and an adhesive sheet that can be easily positioned with respect to an object and can be repeatedly adhered and re-peeled.

The case according to one aspect of the present disclosure includes a case body for accommodating an article and an adhesive sheet provided on the outer surface of the case body, and the adhesive sheet is an adhesive having a fine structure on its surface. It has an agent layer, the surface of the adhesive layer opposite to the surface faces the outer surface, the microstructure includes a plurality of convex structures, and the convex structure includes two or more convex structures. A second portion having a portion and present at the top of the convex structure is made of a non-adhesive or first adhesive material and is located farther from the top than the first portion. The portion is made of a second adhesive material having higher adhesiveness than the material of the first portion.

The adhesive sheet may further include a cushion layer provided on a surface of the adhesive layer opposite to the surface.

The adhesive sheet extends in the first direction on the outer surface of the case body, and the width of the adhesive sheet at one end of the first direction is the width of the adhesive sheet at the center of the first direction. It may be smaller than the width.

The dispenser according to one aspect of the present disclosure is a sheet-like article that can be separated into a plurality of portions, and includes a base sheet and an adhesive layer provided on at least a part of the surface of the base sheet. A dispenser for supplying a portion separated from a sheet-shaped article, which is the above case.

The sheet-like article may be an adhesive tape.

The sheet-shaped article may be a laminated body including a plurality of laminated sticky notes.

The adhesive sheet according to one aspect of the present disclosure includes an adhesive layer having a microstructure on its surface and a cushion layer provided on a surface of the adhesive layer opposite to the surface, and has the microstructure. Contains a plurality of convex structures, the convex structure having two or more portions, the first portion present at the top of the convex structure being from a non-adhesive or first adhesive material. The second portion existing below the first portion is made of a second adhesive material having higher adhesiveness than the material of the first portion.

The adhesive layer may be a first adhesive layer, and the cushion layer may include a second adhesive layer made of a third adhesive material different from the second adhesive material.

The adhesive sheet according to one aspect of the present disclosure includes an adhesive layer having a microstructure on its surface, the microstructure includes a plurality of convex structures, and the convex structure has two or more portions. The first portion present at the top of the convex structure is made of a non-adhesive or first adhesive material, and the second portion existing below the first portion is the first portion. The portion is made of a second adhesive material having a higher adhesiveness than the material, and the second portion constitutes a cushion layer located on a surface of the adhesive layer opposite to the surface.

According to one aspect of the present disclosure, there may be provided cases, dispensers and adhesive sheets that are easy to position relative to the subject and can be repeatedly adhered and re-peeled.

It is a figure which shows the side surface of the dispenser which concerns on one Embodiment. It is a figure which shows the bottom surface of the dispenser of FIG. It is a figure which shows the bottom surface of the dispenser provided with the adhesive sheet which concerns on a modification. It is a perspective view of the adhesive sheet which concerns on one Embodiment. It is sectional drawing along the VV line of FIG. It is sectional drawing of the adhesive sheet which concerns on other embodiment. It is sectional drawing of the adhesive sheet which concerns on other embodiment. It is sectional drawing of a part of the adhesive sheet which concerns on another embodiment. It is sectional drawing which shows another example of a cone structure. It is sectional drawing which shows another example of a frustum structure. It is a perspective view of the adhesive sheet which concerns on another embodiment. It is sectional drawing which shows the process in the method of manufacturing the adhesive sheet of FIG. It is sectional drawing which shows the process which follows the process of FIG. It is sectional drawing which shows the process which follows the process of FIG. FIG. 5 is a cross-sectional view showing a step of attaching a dispenser provided with the adhesive sheet of FIG. 6 to an object. It is sectional drawing which shows the dispenser which concerns on other embodiment. It is sectional drawing which shows the case which concerns on one Embodiment. It is a graph which shows the relationship between a load and a peeling force. It is a graph which shows the relationship between a load and a peeling force. It is a graph which shows the relationship between the number of repetitions and peeling force.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same reference numerals are used for the same or equivalent elements, and duplicate description is omitted. The drawings show the XYZ Cartesian coordinate system as needed.

FIG. 1 is a diagram showing a side surface of a dispenser according to an embodiment. FIG. 2 is a diagram showing the bottom surface of the dispenser of FIG. The dispenser 40 shown in FIG. 1 has a case body (also referred to as a housing) 42 for accommodating a tape-shaped article 44 (sheet-shaped article) and an adhesive sheet 10 provided on the bottom surface 42s (outer surface) of the case body 42. And. The tape-shaped article 44 is an example of a sheet-shaped article that can be separated into a plurality of portions. The dispenser 40 can supply the user with the portion 44a separated from the tape-shaped article 44.

The tape-shaped article 44 includes a base sheet 44s and an adhesive layer 44t provided on at least a part of the surface of the base sheet 44s. In the present embodiment, the adhesive layer 44t is provided on the entire surface of the base sheet 44s. The tape-shaped article 44 is a wound body (roll-shaped article) wound so that the adhesive layer 44t is on the inside. The tape-shaped article 44 does not have to have the adhesive layer 44t.

The case body 42 is, for example, a plastic molded product. The bottom surface 42s of the case body 42 extends in the X-axis direction and the Y-axis direction. The bottom surface 42s has, for example, a rectangular shape with the X-axis direction as the longitudinal direction and the Y-axis direction as the lateral direction. The case body 42 has a side surface 42t connected to an edge (a side extending in the X-axis direction) of the bottom surface 42s. The side surface 42t extends in the X-axis direction and the Z-axis direction. The side surface 42t is provided with, for example, a circular opening 42h. A tubular portion protruding in the Y-axis direction is connected to the edge portion of the opening 42h, and the tape-shaped article 44 is wound around the tubular portion. The case body 42 is provided with a blade 46 for separating the tape-shaped article 44 into a plurality of portions 44a and 44b. At one end of the tape-shaped article 44, the adhesive layer 44t is adhered to the blade 46. When the user removes one end of the tape-shaped article 44 from the blade 46 and pulls it, one end of the tape-shaped article 44 is unwound from the dispenser 40. After that, the user pushes down the tape-shaped article 44 in the Z-axis direction while grasping one end of the tape-shaped article 44, so that the blade 46 cuts the tape-shaped article 44 at the separation point CT between the plurality of portions 44a and 44b. As a result, the portion 44a is separated from the portion 44b.

The adhesive sheet 10 has an adhesive layer 12 having a microstructure 13 on the surface 12a. The back surface 12b (the surface opposite to the surface surface 12a) of the adhesive layer 12 faces the bottom surface 42s of the case body 42. In the present embodiment, the back surface 12b of the adhesive layer 12 is adhered to the bottom surface 42s of the case body 42. The adhesive sheet 10 may be provided on the side surface 42t of the case body 42. The adhesive sheet 10 may be adhered to any surface of the outer surface of the case body 42 other than the bottom surface 42s and the side surface 42t.

FIG. 2 is a diagram showing the bottom surface of the dispenser of FIG. As shown in FIG. 2, the adhesive sheet 10 has, for example, a rectangular shape when viewed from the thickness direction (Z-axis direction) of the adhesive sheet 10. The adhesive sheet 10 extends in the X-axis direction (first direction) on the bottom surface 42s of the case body 42. As shown in FIGS. 3A to 3D, the width of the adhesive sheet 10 at one end 10e in the X-axis direction may be smaller than the width of the adhesive sheet 10 at the center 10m in the X-axis direction. .. The center 10m is the center of the length of the adhesive sheet 10 in the X-axis direction. The shape of the adhesive sheet 10 shown in FIG. 3A is a triangle. The shape of the adhesive sheet 10 shown in FIG. 3B is a rhombus. The shape of the adhesive sheet 10 shown in FIG. 3 (c) is octagonal. The shape of the adhesive sheet 10 shown in FIG. 3D is an ellipse.

FIG. 4 is a perspective view of the adhesive sheet according to the embodiment. FIG. 5 is a cross-sectional view taken along the line VV of FIG. The adhesive layer 12 of the adhesive sheet 10 shown in FIGS. 4 and 5 does not have a fine structure on the back surface 12b. The front surface 12a and the back surface 12b extend along a plane (for example, the XY plane) orthogonal to the thickness direction (for example, the Z-axis direction) of the adhesive layer 12. The microstructure 13 includes a plurality of cone structures 31. The cone structure 31 may be replaced with a frustum structure 131 (FIG. 8) or a rib structure 231 (FIG. 11), which will be described later. The cone structure 31, the frustum structure 131, and the rib structure 231 are examples of convex structures (convex bodies), respectively. As used herein, the term "convex structure" generally refers to any plane figure as the bottom surface, and all points on the sides of the bottom surface and the sides of any other plane figure or straight line (top) that is not on the plane. It is a three-dimensional figure composed by connecting all points. Preferably, the area of the top of the convex structure is smaller than the area of the bottom. More preferably, the convex structure has a shape that tapers from the bottom to the top. The plurality of cone structures 31 are arranged in a grid pattern on the surface 12a along the X-axis direction and the Y-axis direction. The X-axis direction and the Y-axis direction of FIGS. 4 and 5 do not have to coincide with the X-axis direction and the Y-axis direction of FIGS. 1 and 2. FIG. 5 is a cross-sectional view passing through the vertices of a plurality of cone structures 31 arranged along the X-axis direction. The plurality of cone structures 31 may be arranged regularly or irregularly, preferably on a plane. The area of the pyramid structure 31 projected on the plane orthogonal to the height direction of the pyramid structure 31 (the area of the bottom surface 1 of the pyramid structure 31) may be 10 square μm or more, and is 10,000 square μm or less. There may be.

Each cone structure 31 has a bottom surface 1, a top portion 2, and a plurality of side surfaces 3 connecting the edge of the bottom surface 1 and the top portion 2. The bottom surface 1 has an arbitrary plane figure such as a circle (including an ellipse) or a polygon. Examples of the shape of the pyramid structure 31 include a cone, a triangular pyramid, a quadrangular pyramid, and a hexagonal pyramid. In the examples shown in FIGS. 4 and 5, the shape of the pyramid structure 31 is a quadrangular pyramid. The shape of the cone structure 31 may be the same or different, but has substantially the same height (eg, the difference is within ± 5%, within ± 3%, or within ± 1%). It is preferable, and it is more preferable that they all have substantially the same shape. When there are pyramidal structures 31 having different shapes, the microstructure 13 has 10 or less, 9 or less, 8 or less, 7 or less, 6 or less, 5 or less, 4 or less, 3 or less, or It is preferably composed of two or less pyramidal structures 31. Two or more of the cone structure 31, the frustum structure 131 (FIG. 8), and the rib structure 231 (FIG. 11) may coexist.

Each cone structure 31 includes a first portion 4 existing at the top 2 of the cone structure 31 and a second portion 5 existing below the first portion 4 (bottom surface 1 side). The second portion 5 is farther from the top 2 than the first portion 4.

The top portion 2 is the portion of the cone structure 31 that first contacts the target when the adhesive sheet of the present disclosure approaches the target (also referred to as an adherend) in the highest position of the cone structure 31. ) Is the part that actually occupies. The apex 2 preferably includes the vertices of the cone structure 31. Substantially occupying means that it is permissible even if a different material is attached or mixed in a small part. For example, the first portion 4 may occupy most of the highest region of the cone structure 31 (eg, 90% or more, or 95% or more). Even if a small amount of filler or the like is contained in the region, the filler or the like does not fall under the first part 4. The first portion 4 supports the adhesive sheet 10 when the pressure applied to the adhesive sheet 10 is low, thereby providing the adhesive sheet 10 with slidability. In the second portion 5, when the pressure applied to the adhesive sheet 10 exceeds a certain level, the second portion 5 itself is deformed, the first portion 4 is deformed, or the first portion 4 is deformed. Is taken into the second portion 5 or the like, and comes into contact with the object to provide adhesiveness.

The first portion 4 and the second portion 5 may be joined to each other, for example, via an interface along the XY plane. "Joining through an interface" means a state in which two matrix phases having different compositions are in contact with each other through a clear boundary surface. For example, the first portion 4 (matrix phase) and the second portion 5 (matrix phase) are layer-separated as shown in FIGS. 4 and 5, thereby joining through an interface. .. For example, in the case of a composition in which fine particles are dispersed in a resin, the resin as a substrate corresponds to the matrix phase, while the fine particles correspond to the dispersed phase. In a bonding mode in which two phases have a common matrix phase but only a dispersed phase is different, or the material is continuously changed, for example, in a material in which fine particles are dispersed in a resin, only the density of the fine particles is present. Those that change continuously are not included in the junction through the interface. The interface may be a plane parallel to or non-parallel to the bottom surface 1 of the cone structure 31. The interface may have a curved surface to the extent that it is derived from a manufacturing error or surface tension in the manufacturing method described later. The cone structure 31 may have a third portion further, or may have a multi-layer structure having more than that.

The first portion 4 is made of a non-adhesive or weakly adhesive material (non-adhesive or first adhesive material). The non-adhesive or weakly adhesive material preferably has no adhesiveness to the object, or has adhesiveness but can be easily re-peeled. In one embodiment, the non-adhesive or weakly adhesive material has a storage elastic modulus (G') calculated by dynamic viscoelasticity measurement at a frequency of 1 Hz at room temperature of 3 × 10 ⁵ Pa or more, 4 Resin of × 10 ⁵ Pa or more, 5 × 10 ⁵ Pa or more, 6 × 10 ⁵ Pa or more, 7 × 10 ⁵ Pa or more, 8 × 10 ⁵ Pa or more, 9 × 10 ⁵ Pa or more, or 1 × 10 ⁶ Pa or more Is. Specific examples include polyurethane, poly (meth) acrylate, cellulose, silicone, amine-based resin, fluororesin, polyvinyl chloride, and the like. Non-adhesive or weakly adherent when tested according to JIS K 7125, except for pulling metal sliding pieces such as steel (eg SS400, may have plating such as chrome plating) at a speed of 1000 mm / min. The coefficient of static friction of the sex material is preferably 10 or less, 7 or less, 5 or less, 4 or less, or 3 or less. The non-adhesive or weakly adhesive material is a water-miscible solvent such as water or alcohol, or a water-immiscible solvent such as hydrocarbon, which has high solubility and / or dispersibility in any of the general-purpose solvents. Is preferable. Further, the solvent for dissolving and / or dispersing the non-adhesive or weakly adhesive material is preferably one having a relatively low vapor pressure and easy to dry. Further, it is preferable to consider the wettability to the mold for forming the microstructure 13. If the wettability is too low, the solvent may not completely enter the inside of the concave portion of the mold, and if it is too high, the solvent may remain between the concave portions of the mold.

The second portion 5 is made of a second adhesive material having higher adhesiveness than the material of the first portion 4. As the second adhesive material, a material having adhesiveness to the object but easily re-peelable is preferable. In addition, re-peeling means that once pasted, it can be peeled off with little adhesive residue. In one embodiment, the second adhesive material has a storage modulus calculated by a dynamic viscoelasticity measurement (G ') is under 25 ° C., as measured at a frequency of 1Hz 3 × 10 5 ^Pa or less pressure sensitive It is an agent. Specific examples include acrylic adhesives, rubber adhesives, silicone adhesives, urethane adhesives, polyester adhesives, polyolefin adhesives, and adhesives blended thereto. The second adhesive material has high solubility and / or dispersibility in any of the general-purpose solvents of a water-miscible solvent such as water and alcohol, or a water-immiscible solvent such as a hydrocarbon. Is preferable. Further, the solvent for dissolving and / or dispersing the second adhesive material preferably has a relatively low vapor pressure and is easy to dry. Further, it is preferable to consider the wettability to the mold for forming the microstructure 13. If the wettability is too low, the solvent may not completely enter the inside of the concave portion of the mold, and if it is too high, the solvent may remain between the concave portions of the mold.

It is preferable that both the material of the first portion 4 and the material of the second portion 5 have a certain hardness or more so that the microstructure 13 can be maintained. For example, a material having tan δ of 0.8 or less, 0.7 or less, 0.6 or less, 0.5 or less, 0.4 or less, or 0.3 or less as measured at a frequency of 1 Hz at room temperature is preferable.

In addition, "adhesiveness" means the strength of relative adhesiveness to the same object. Adhesiveness can be evaluated by known methods such as dynamic viscoelasticity measurement or 90 ° and 180 ° peel strength tests.

The combination of the material of the first portion 4 and the material of the second portion 5 is not limited, but it is more preferable to select the material in consideration of the adhesive force between them. For example, from the viewpoint of affinity of the polymer structure and the like, if the material of the first portion 4 is silicone, the material of the second portion 5 is also preferably a silicone-based adhesive. However, it is not always necessary that the material of the first portion 4 and the material of the second portion 5 are polymers having the same structure.

The adhesive layer 12 may have a base 32 in a portion below the plurality of cone structures 31. The base 32 is joined or continuous with the bottom surface 1 of the cone structure 31 of the microstructure 13. The material of the base 32 may be the same as or different from the second portion 5. In one embodiment, the cone structure 31 consists of two parts, a first part 4 and a second part 5, the base 32 is made of the same material as the second part 5, and is continuous with the second part 5. is doing. The thickness of the base 32 can be arbitrarily set according to the desired thickness of the adhesive layer 12. When the material of the base portion 32 is elastic, the cone structure 31 in the microstructure 13 can sink into the base portion 32, so that the second portion 5 of the cone structure 31 is more likely to come into contact with the object. , The adhesiveness of the adhesive sheet 10 may be improved.

If the material of the first portion 4, the material of the second portion 5, and the material constituting the other portion, if present, are all transparent, the entire adhesive layer 12 can be made transparent. .. At that time, in order to make the interface to which each part is joined invisible, it is preferable that the difference in the refractive index of the materials constituting each part is within 1%. Specifically, the first portion 4 and the second portion 5 of the cone structure 31 are adjacent to each other, and the refractive index of the material constituting the first portion 4 and the material constituting the second portion 5 When the difference in refractive index of is within 1%, within 0.9%, within 0.8%, within 0.7%, or within 0.6%, the interface between the two portions is generally invisible. For example, if the first portion 4 is made of an acrylic transparent resin and the second portion 5 is made of an acrylic transparent adhesive, such a requirement is satisfied and the completely transparent adhesive layer 12 is formed. It will be possible to provide. In addition, transparency can be defined by, for example, a haze measured according to JIS K 7136 being 40% or less.

From the viewpoint of facilitating the formation of the first portion 4, the cone structure 31 included in the microstructure 13 has a maximum distance between the centers of two adjacent cone structures 31 of 300 μm or less and 260 μm or less. It may be 220 μm or less, 180 μm or less, 140 μm or less, or 100 μm or less. The center of the cone structure 31 means the apex of the cone. The center of the frustum structure 131 (FIG. 8) means the apex of the corresponding cone structure.

From the viewpoint of facilitating the formation of the first portion 4, the width of the bottom surface 1 of the cone structure 31 (corresponding to α described later) in the arrangement direction of the cone structure 31 (for example, the X-axis direction) is 500 μm or less. , 450 μm or less, 400 μm or less, 350 μm or less, 300 μm or less, 250 μm or less, 200 μm or less, 150 μm or less, 100 μm or less, 95 μm or less, 90 μm or less, 85 μm or less, 80 μm or less, 75 μm or less, 70 μm or less, 65 μm or less, 60 μm or less, 55 μm It may be less than or equal to 50 μm or less.

The height H of the cone structure 31 is 5 μm or more from the viewpoint of facilitating the production of the adhesive sheet 10 or facilitating the peeling of the liner 71 (see FIG. 14) from the completed adhesive sheet 10. And it may be 100 μm or less, 95 μm or less, 90 μm or less, 85 μm or less, 80 μm or less, 75 μm or less, 70 μm or less, 65 μm or less, 60 μm or less, 55 μm or less, or 50 μm or less.

The bottom surfaces 1 of two adjacent cone structures 31 may be close to each other. For example, in the case of a quadrangular pyramid or a hexagonal pyramid, the bottom surface 1 of two adjacent pyramid structures 31 may share one side, or the adjacent sides are, for example, 250 μm or less, 200 μm or less, 150 μm or less, 100 μm. Hereinafter, they may be separated at intervals of 50 μm or less, 15 μm or less, or 10 μm or less (corresponding to β described later).

The pitch α of the adjacent cone structures 31 (the pitch in the case of FIG. 8 is α + β) may be 10 μm or more, 15 μm or more, 20 μm or more, 200 μm or less, 150 μm or less, 100 μm or less.

The height H of the cone structure 31 may be 5 μm or more, 10 μm or more, and 25 μm or less. Assuming that the height H of the cone structure 31 is 100%, the height H1 of the first portion 4 is 10% or more, 15% or more, 20 of the height H of the cone structure 31 from the viewpoint of slidability and the like. It may be% or more. Further, it may be 90% or less, 80% or less, 70% or less, 60% or less, or 50% or less from the viewpoint of adhesive strength after crimping. The height H2 of the second portion 5 corresponds to the difference between the height H of the cone structure 31 and the height H1 of the first portion 4. The heights H, H1 and H2 are based on the normal direction (Z-axis direction) of the bottom surface 1 of the cone structure 31. When the interface between the first portion 4 and the second portion 5 below it is a plane or curved surface non-parallel to the bottom surface 1, the average value of the heights of the interfaces obtained with reference to the normal direction of the bottom surface 1 The height H1 is calculated from. When the first portion 4 is relatively small, the sliding property of the adhesive sheet 10 is reduced and the frictional force is increased, but the adhesive force exerted when a certain pressure or more is applied tends to be improved. On the other hand, when the first portion 4 is relatively large, the opposite is true.

The thickness of the adhesive layer 12 can be arbitrarily set according to the adhesive material to be used, the purpose of use of the adhesive sheet 10, and the like, and can be, for example, in the range of 15 μm to 10 mm or 200 μm to 4 mm. The thickness of the adhesive layer 12 is based on the normal direction of the bottom surface 1 of the cone structure 31, and the highest portion of the cone structure 31 and the back surface 12b on the opposite side of the front surface 12a having the microstructure 13 It means the distance between them.

The angle θ formed by the side surface 3 and the bottom surface 1 of the cone structure 31 is the apex and the cone structure of the cone structure 31 from the viewpoint of ease of formation of the first portion 4 or the slideability of the adhesive layer 12. In the cross section (XZ plane) including the arrangement direction of 31, it may be 5 ° or more, 10 ° or more, 15 ° or more, 20 ° or more, 25 ° or more. Further, from the viewpoint of smoothing the peeling of the adhesive sheet 10 from the liner 71, which will be described later, the angle θ is set in the cross section (XZ plane) including the apex of the cone structure 31 and the arrangement direction of the cone structure 31. It may be less than 90 °, 85 ° or less, 80 ° or less, or 70 ° or less.

The number of cone structures 31 is 16 or more, 25 or more, 36 or more, 49 or more, 64 or more, 81 or more per ^{1 mm 2} of the surface of the adhesive layer 12 from the viewpoint of providing sufficient slideability. Or, it is preferable that there are 100 or more. The number of cone structures 31 corresponds to the number of centers of the cone structures 31 existing in a unit area. The high density of the cone structure 31 also contributes to the improvement of slideability.

The adhesive layer 12 may contain additional materials other than the adhesive, such as fine particles such as hollow or solid glass spheres for the purpose of adjusting the adhesiveness. However, the adhesive sheet 10 of the present disclosure can achieve the desired properties without including such additional materials. In one embodiment, the adhesive layer 12 does not contain fine particles.

(Characteristics of adhesive sheet)
The adhesive sheet 10 is used under low pressure, for example, when the pressure applied to the back surface 12b of the adhesive layer 12 is 100 g / cm ² or less, 50 g / cm ² or less, 10 g / cm ² or 5 g / cm ² or less. Has sufficient slideability. In a preferred embodiment, the adhesive sheet 10 is JIS K 7125 except that it pulls a metal sliding piece such as a steel material (eg, SS400 material, may have plating such as chrome plating) at a speed of 1000 mm / min. dynamic friction coefficient when tested (mu _D) of 10 or less according, 5 or less, 3 or less, it is. With such a low frictional force, the adhesive sheet 10 can be easily slid and aligned with the adhesive sheet 10 in light contact with the object.

The adhesive sheet 10 exhibits sufficient adhesive force to the object when a relatively high pressure is applied to the back surface 12b of the adhesive layer 12. In one embodiment, the relatively high pressure is applied by reciprocating a 2 kg roller at a speed of 300 mm / min using a crimping device specified in 10.2.4 of JIS Z 0237: 2009. It can be defined as the pressure corresponding to the pressure. In another embodiment, relatively high pressures are 200 g / cm ^{2 and} above, 300 g / cm ^{2 and} above, 400 g / cm ^{2 and} above, 500 g / cm ^{2 and} above, 600 g / cm ^{2 and} above, or 700 g / cm ^{2 and} above. It can be defined as pressure. In a preferred embodiment, the adhesive sheet 10 has a peeling force of 30 N / 20 mm or less when tested under the conditions of a temperature of 23 ° C. and a tensile speed of 300 mm / min according to JIS Z 0237: 2009. With such an adhesive force, the adhesive sheet 10 can be easily peeled off again.

Since the adhesive sheet 10 has a microstructure 13 on the surface 12a of the adhesive layer 12, it is difficult for air bubbles to be taken into the adhesive surface when the adhesive sheet 10 is attached to an object, and even if air bubbles are taken in, they can be easily released. .. In the present specification, such a property is referred to as "air bleeding property". In one embodiment, the surface 12a of the adhesive layer 12 may further have a groove-like additional structure for improving air bleeding, in addition to the microstructure 13 described above.

The coefficient of static friction of the adhesive sheet 10 when tested according to JIS K 7125 may be 10 or less, or 5 or less, except that the steel material is pulled at a speed of 1000 mm / min. In this case, the adhesive sheet 10 has high slideability with respect to an object pressed with a low pressure.

FIG. 6 is a cross-sectional view of the adhesive sheet according to another embodiment. The adhesive sheet 110 shown in FIG. 6 has the same configuration as the adhesive sheet 10 shown in FIGS. 4 and 5 except that the cushion layer 102 is further provided. The cushion layer 102 is provided on the back surface 12b, which is not provided with a fine structure.

The cushion layer 102 is softer than the adhesive layer 12. The compressive load of the cushion layer 102 is smaller than the compressive load of the adhesive layer 12. The compressive load of the cushion layer 102 may be, for example, 1 MPa or less, 0.5 MPa or less, and 0.1 MPa or less. The compressive load is applied by stacking a plurality of cushion layers 102 cut into a size of 25 mm × 25 mm until they have a thickness of D (10 mm), sandwiching them between a pair of plates, and then compressing them at a speed of 10 mm per minute by a tensile tester. However, it is the load when the thickness D is compressed by 25% (7.5 mm). When the compressive load is small, the cushioning property is high.

The thickness of the cushion layer 102 may be 0.1 mm or more and 0.5 mm or more. When the cushion layer 102 is made thicker, the cushioning property becomes higher.

The cushion layer 102 is an adhesive layer (second adhesive layer) made of a third adhesive material different from the material (second adhesive material) of the second portion 5 of the adhesive layer 12 (first adhesive layer). ) May be. The example of the third adhesive material is the same as the example of the second adhesive material. The cushion layer 102 may come into contact with the adhesive layer 12. In this case, the adhesive layer 12 and the cushion layer 102 function as an integral adhesive layer, so that the adhesiveness is improved. The cushion layer 102 may be an adhesive layer containing, for example, thermoplastic polyurethane, acrylic foam, or the like. The cushion layer 102 may form a cushion layer together with the second portion 5 and the base portion 32 of the adhesive layer 12. That is, in the adhesive sheet 10, the second portion 5 and the base portion 32 of the adhesive layer 12 may form the cushion layer 102.

A carrier such as a resin film or an additional layer (for example, an adhesive layer) may be arranged between the cushion layer 102 and the adhesive layer 12. Examples of the resin film include a film made of ABS, ASA, acrylic, polycarbonate, polyurethane, a fluororesin, polyethylene, polypropylene, polyester, PVC, or the like. In this case, the adhesive sheet 110 may have an arbitrary layer including a primer or the like between the cushion layer 102 and the adhesive layer 12.

When the cushion layer 102 is used, the cone structure 31 in the microstructure 13 can be subducted into the cushion layer 102, so that the second portion 5 of the cone structure 31 can be more easily contacted with the target, and the adhesive sheet 110 Adhesiveness may be improved.

FIG. 7 is a cross-sectional view of the adhesive sheet according to another embodiment. The adhesive sheet 210 shown in FIG. 7 has the same configuration as the adhesive sheet 110 of FIG. 6 except that the cushion layer 104 is provided instead of the cushion layer 102. The cushion layer 104 has a non-adhesive layer 104a and adhesive layers 104b and 104c provided on both sides of the non-adhesive layer 104a, respectively. The adhesive layer 104b is arranged between the adhesive layer 12 and the non-adhesive layer 104a. The cushion layer 104 does not have to include the adhesive layer 104b. The examples of the materials of the adhesive layers 104b and 104c are the same as the examples of the materials of the cushion layer 102. Examples of the non-adhesive layer 104a are the above-mentioned resin film, polyurethane foam, acrylic foam, and the like.

FIG. 8 is a cross-sectional view of a part of the adhesive sheet according to another embodiment. The adhesive sheet 310 shown in FIG. 8 includes a plurality of frustum structures 131 instead of the plurality of frustum structures 31, except that the plurality of frustum structures 131 are arranged at intervals in the arrangement direction. Has the same configuration as the adhesive sheet 10. Each frustum structure 131 has a structure in which the uppermost portion including the apex of the cone structure 31 is partially removed. Examples of the shape of the pyramid structure 131 include a truncated cone, a triangular pyramid, a quadrangular pyramid, a hexagonal pyramid, and the like. Each frustum structure 131 includes a first portion 4 existing at the top 2 of the frustum structure 131 and a second portion 5 existing below the first portion 4 (bottom surface 1 side).

In the present embodiment, in the arrangement direction of the frustum structure 131 (for example, the X-axis direction), the width of the bottom surface 1 of the frustum structure 131 is α, and the distance between the bottom surfaces 1 of the adjacent frustum structures 131 is β. In the example of FIG. 8, β is greater than 0, but β may be 0.

In the arrangement direction of the frustum structure 131, the width of the top surface of the frustum structure 131 is a, and the distance between the top surfaces of the adjacent frustum structures 131 is b. When a is 0, the frustum structure 131 has the same structure as the cone structure 31.

The width a of the top surface of the frustum structure 131 in the arrangement direction of the frustum structure 131 is, for example, 50 μm or less, 40 μm or less, 30 μm or less, 20 μm or less, or 10 μm or less. By preventing the width a of the top surface from being excessively large with respect to the width α of the bottom surface 1, it is possible to prevent the adhesive force exerted when a certain pressure or more is applied from being reduced.

FIG. 9 is a cross-sectional view showing another example of the cone structure. The cross section of the cone structure 31 may have the triangle shown in FIG. 9 (a), or may have distorted sides as shown in (b)-(d). As shown in (e), the position of the apex may have a shape deviated from the center of the bottom surface. As shown in FIG. 9 (f), the cross section of the cone structure 31 may have a distorted side surface and a shape in which the position of the apex is deviated from the center of the bottom surface. The cross sections passing through the vertices of the cone structure 31 are not necessarily all the same shape, and each cross section may have a different shape.

FIG. 10 is a cross-sectional view showing another example of the frustum structure. The cross section of the frustum structure 131 may have the trapezoidal shape shown in FIG. 10 (a), or may have distorted side surfaces as shown in (b)-(c). As shown in (d) to (e), it may have a distorted top surface. As shown in FIG. 10 (f), the cross section of the frustum structure 131 may have a distorted side surface and a distorted top surface. The cross sections passing through the vertices of the cone corresponding to the frustum structure 131 are not necessarily all the same shape, and each cross section may have a different shape. Further, the top surface of the frustum structure 131 does not have to be parallel to the bottom surface or may not be flat.

FIG. 11 is a perspective view of the adhesive sheet according to another embodiment. The adhesive sheet 410 shown in FIG. 11 has the same configuration as the adhesive sheet 10 of FIG. 1 except that it has a plurality of rib structures 231 instead of the plurality of cone structures 31. The adhesive sheet 410 includes an adhesive layer 212 having a microstructure 113 including a plurality of rib structures 231. The plurality of rib structures 231 are arranged along the X-axis direction, and each rib structure 231 extends in the Y-axis direction. Each rib structure 231 includes a first portion 14 existing at the top of the rib structure 231 and a second portion 15 existing below (bottom side) the first portion 14. The cross section of the adhesive sheet 410 orthogonal to the Y-axis direction is the same as the cross section of the adhesive sheet 10 shown in FIG.

The rib structure 231 has a flat surface whose bottom surface is a plane whose length in an arbitrary axial direction (Y-axis direction) on the plane is longer than the length in the axial direction (X-axis direction) orthogonal to the axis, and all the sides of the bottom surface. It is a three-dimensional figure formed by connecting the points of No. 1 and all the points on the sides of a line or a rectangle that are not on the plane and extend in a direction substantially parallel to the Y-axis direction. The cross section of the rib structure 231 has an arbitrary shape as exemplified in FIGS. 9 (a) to 9 (f) and FIGS. 10 (a) to 10 (f), similarly to the cone structure 31 and the frustum structure 131. be able to. The ratio of the length in the Y-axis direction to the length in the X-axis direction of the bottom surface of the rib structure 231, that is, the aspect ratio is, for example, 2 or more, 3 or more, 4 or more, 5 or more, 10 or more, 50 or more, 100 or more. 500 or more, 1000 or more, or 10000 or more. The rib structure 231 may be continuous along an arbitrary axial direction over the entire surface of the adhesive sheet 410.

FIG. 12 is a cross-sectional view showing a process in the method of manufacturing the adhesive sheet of FIG. FIG. 13 is a cross-sectional view showing a step following the step of FIG. FIG. 14 is a cross-sectional view showing a step following the step of FIG. The adhesive sheet 110 of FIG. 6 can be manufactured, for example, by going through the following steps.

(Mold preparation process)
First, the mold 61 is prepared as shown in FIG. 12 (a). The mold 61 has a microstructure 61b on the surface 61a. The microstructure 61b includes a plurality of cone structures 61c. The mold 61 can be made by processing a flat plate made of a material such as metal or resin with a diamond bite or a laser. The cone structure 61c has substantially the same shape as the cone structure 31 of the adhesive sheet 110. The difference between the size of the cone structure 61c and the size of the cone structure 31 is preferably within ± 5%, within ± 3%, or within ± 1%. However, with respect to the height H of the cone structure 31, a larger difference may occur due to the contraction of the second portion 5 or the influence of gravity. The size of the cone structure 31 means that immediately after the liner 71 is peeled off, for example, within 5 minutes or within 3 minutes.

(Liner manufacturing process)
Next, as shown in FIGS. 12A to 12C, the mold 61 is pressed against the liner 71 to transfer the microstructure 61b of the surface 61a of the mold 61 to the liner 71. Examples of the material of the liner 71 include those capable of forming the fine structure 61b by transfer and holding it. An example of the liner 71 includes a sheet 71a in which a resin is laminated on the surface of a sheet body made of resin or paper, and a release coating 71b provided on the surface of the sheet 71a. The release coating 71b is made of, for example, silicone. The transfer of the microstructure 61b can be performed, for example, by applying the mold 61 to the surface of the liner 71 (peeling coating 71b) and heat-pressing the surface of the liner 71. By transfer, a microstructure 72 complementary to the microstructure 61b of the mold 61 is formed on the surface of the liner 71. The microstructure 72 includes a plurality of recesses 72a having a cone structure.

(Forming process of the first part)
Next, as shown in FIGS. 13 (a) to 13 (d), the first portion is formed by applying a solution containing a non-adhesive or weakly adhesive material to the microstructure 72 of the liner 71 and then solidifying it. Form 4.

First, as shown in FIG. 13A, a solution 81 containing a non-adhesive or weakly adhesive material is applied to the microstructure 72 formed on the surface of the liner 71 by coating or spraying.

Next, as shown in FIG. 13B, the excess solution 81 is scraped off by a removing device 82 such as a doctor blade or a squeegee. The removing device 82 moves in the direction A along the surface of the liner 71. As a result, as shown in FIG. 13C, the solution 81 is stored in each of the recesses 72a formed on the surface of the liner 71. In the microstructure 72 formed on the surface of the liner 71, it is preferable that the recesses 72a and the recesses 72a are close to each other because the solution 81 can be easily scraped off.

Next, as shown in FIG. 13D, the solution 81 in the recess 72a is dried to remove the solvent to form the first portion 4 in the recess 72a. The first portion 4 is located at the bottom of each recess 72a and is made of a solid non-adhesive or weakly adhesive material. After drying, the non-adhesive or weakly adhesive material may be cured by irradiating the first portion 4 with ultraviolet rays, electron beams, or the like, if necessary. In one embodiment, as shown in FIG. 13D, the first portion 4 occupies the bottom to the middle of the recess 72a and is substantially parallel to the horizontal plane determined by the placement of the liner 71 during drying. Has a surface on the upper side. In the mold 61 used when manufacturing the liner 71, when the angle θ between the side surface and the bottom surface of the cone structure 61c is large, or when the distance between the bottom surfaces of the cone structure 61c is small, non-adhesiveness or The solution 81 containing the weakly adhesive material can be easily dropped into the lowermost portion of the recess 72a. As a result, the formation of the first portion 4 is also facilitated. Solution 81 is prepared by dissolving and / or dispersing a resin such as polyurethane, poly (meth) acrylate, or cellulose, silicone, amine-based resin, fluorine-based resin, or polyvinyl chloride in an appropriate solvent. The solvent used for the solution 81 may also affect the scraping of the solution 81 described above. For example, when a solvent such as ethyl acetate, methyl ethyl ketone, or methyl isobutyl ketone is used, the distance between the bottom surfaces of the cone structure 61c in the mold 61 is preferably closer (for example, 50 μm or less).

(Forming process of the second part)
Next, as shown in FIG. 14A, the second portion 5 is formed by applying the second adhesive material or a precursor thereof to the liner 71 on which the first portion 4 is formed. .. In the present embodiment, the adhesive layer 12 including the second portion 5 and the base portion 32 is formed on the liner 71. If any other part exists between the first part 4 and the second part 5, the formation of the second part 5 is the arbitrary part after the formation of the first part 4. It is done after forming. The application of the second adhesive material can be carried out in various ways. For example, a second adhesive material that has already been molded into a sheet or the like is attached to the fine structure 72 of the liner 71, and heat and / or pressure is applied, or the second adhesive material is allowed to stand for a certain period of time or longer under normal temperature and pressure. The adhesive material is allowed to flow into the recess 72a on the surface of the liner 71 and is joined to the first portion 4 at the bottom of the recess 72a. In another example, a precursor that is cured by irradiation with an energy ray such as an ultraviolet ray or an electron beam to become a second adhesive material is applied to the microstructure 72 of the liner 71 to enter the recess 72a, and then the energy ray is applied. Irradiate. In another example, a solution of the second adhesive material is applied to the microstructure 72 of the liner 71 to penetrate the recess 72a, then heated as needed and dried to remove the solvent.

(Cushion layer forming process)
Next, as shown in FIGS. 14 (b) to 14 (c), the cushion layer 102 is formed on the adhesive layer 12. The cushion layer 102 is laminated on the adhesive layer 12 by using, for example, a roller 103. The cushion layer 102 is made of, for example, an acrylic foam tape, and the cushion layer 102 is adhered to the adhesive layer 12. After that, the liner 71 is peeled off from the adhesive layer 12.

By going through each of the above steps, the adhesive sheet 110 of FIG. 6 can be manufactured. After forming the second portion 5 as shown in FIG. 14A, the liner 71 may be peeled off from the adhesive layer 12 without forming the cushion layer 102. In this case, the adhesive sheet 10 of FIGS. 4 and 5 can be manufactured. Further, in the step of forming the cushion layer, the adhesive sheet 210 of FIG. 7 can be manufactured by forming the cushion layer 104 on the adhesive layer 12. Further, by changing the shape of the microstructure 61b of the mold 61, the adhesive sheet 310 of FIG. 8 or the adhesive sheet 410 of FIG. 11 can be manufactured in the same manner as described above.

FIG. 15 is a cross-sectional view showing a step of attaching the dispenser 140 provided with the adhesive sheet 110 of FIG. 6 to the object 111. The dispenser 140 has the same configuration as the dispenser 40 of FIG. 1 except that the adhesive sheet 110 is provided instead of the adhesive sheet 10.

First, as shown in FIG. 15A, the dispenser 140 is placed on the target 111 so that the surface 12a of the adhesive layer 12 faces the target 111. The object 111 is, for example, a desk or a wall. The surface of the object 111 may extend in the horizontal direction or may extend in the vertical direction. The surface of the object 111 may be an inorganic substance such as metal or ceramic, or an organic substance such as resin. With the dispenser 140 pressed against the subject 111 at all or little, the first portion 4 supports the dispenser 140 and the second portion 5 makes no or little contact with the subject 111. In this case, the dispenser 140 has a sliding property. That is, since the dispenser 140 is slidable with respect to the target 111, the position can be easily changed.

On the other hand, as shown in FIG. 15B, when the dispenser 140 is pressed against the target 111 with the pressure B, the second portion 5 itself is deformed, the first portion 4 is deformed, or the first portion 4 is deformed. The second portion 5 comes into contact with the target 111 because the portion 4 is incorporated into the second portion 5. As a result, the adhesive layer 12 exerts an adhesive force on the target 111. Further, the adhesive layer 12 can be peeled off from the target 111 again.

As described above, when the dispenser 140 is pressed against the target 111 with pressure B while the adhesive sheet 110 is arranged between the case body 42 and the target 111, the dispenser 140 can be adhered to the target 111. Then, by lifting the dispenser 140, the dispenser 140 can be peeled off from the target 111 again. In this way, when the adhesive sheet 110 is used, the adhesion and re-peeling of the dispenser 140 can be repeated. In the dispenser 140, the movement of the dispenser 140 is suppressed when the tape-shaped article 44 (see FIG. 1) is pulled or cut. Therefore, the movement of the dispenser 140 (or the dispenser 50 of FIG. 16 or the case 60 of FIG. 17) can be suppressed, or the portion 44a (or the tape-shaped article 44) from the dispenser 140 (or the dispenser 50 of FIG. 16 or the case 60 of FIG. 17) can be suppressed. Alternatively, the weights conventionally required for stabilizing the operation of taking out the sticky notes 54a to 54f of FIG. 16 or the article 64) of FIG. 17 and the space for arranging the weights are not required. As a result, the dispenser 140 can be made smaller and lighter. Similarly, even if the adhesive sheets 10, 210, 310, 410 are used instead of the adhesive sheet 110, the adhesion and re-peeling to the target 111 can be repeated. Even when the adhesive sheets 10, 110, 210, 310, 410 are individually attached to the target 111, the adhesive sheets 10, 110, 210, 310, 410 may be repeatedly adhered and re-peeled to the target 111. can.

Since the adhesive sheet 110 includes the cushion layer 102, the cushion layer 102 can be deformed when the dispenser 140 is adhered to the target 111. Therefore, even when the bottom surface 42s, the side surface 42t, or the surface of the target 111 of the case body 42 has irregularities or distortions, the contact area between the surface 12a of the adhesive layer 12 and the target 111 can be increased. For example, when the case body 42 is a plastic molded product, the bottom surface 42s and the side surface 42t of the case body 42 may be distorted. At that time, there will be a gap between the distorted bottom surface 42s or side surface 42t and the target 111. In that case, since the adhesive area is small with the thin double-sided tape, it is difficult to obtain the originally required adhesive strength. On the other hand, when the cushion layer is present, the contact area between the surface 12a of the adhesive layer 12 and the target 111 can be increased by deforming the cushion layer 102. Further, even when the adhesive sheet 110 is attached to the target 111 alone, the contact area between the surface 12a of the adhesive layer 12 and the target 111 can be increased by the deformation of the cushion layer 102. Similarly, for the adhesive sheet 210, the contact area between the surface 12a of the adhesive layer 12 and the target 111 can be increased by deforming the cushion layer 104. When a sufficient adhesive area is present, sufficient adhesive strength is developed, the dispenser 140 (or the dispenser 50 of FIG. 16 or the case 60 of FIG. 17) is properly held by the object 111, and the tape-shaped article 44 portion 44a (Or the action of pulling out the sticky notes 54a to 54f of FIG. 16 or the article 64 of FIG. 17) is not suppressed.

As shown in FIGS. 3A to 3D, when the width of the adhesive sheet 10 at one end 10e in the X-axis direction is smaller than the width of the adhesive sheet 10 at the center 10m in the X-axis direction, adhesion is performed. The adhesive sheet 10 can be peeled off from the target 111 starting from one end of the agent sheet 10. When the dispenser 40 of FIG. 1 is peeled from the target 111, the user pushes up a portion of the case body 42 close to one end 10e of the adhesive sheet 10 to facilitate the peeling.

FIG. 16 is a cross-sectional view showing a dispenser according to another embodiment. The dispenser 50 shown in FIG. 16 includes a case main body 52 for accommodating the laminated body 54 (sheet-like article) and an adhesive sheet 10 provided on the bottom surface 52s (outer surface) of the case main body 52. The laminated body 54 is an example of a sheet-like article that can be separated into a plurality of portions. The laminated body 54 includes a plurality of laminated sticky notes 54a to 54f (a plurality of portions). The sticky notes 54a to 54f are separable from each other. Each of the sticky notes 54a to 54f includes a base sheet and an adhesive layer provided on a part of the surface of the base sheet. The dispenser 50 can supply the user with the sticky notes 54a to 54f separated from the laminated body 54.

The back surface 12b of the adhesive layer 12 of the adhesive sheet 10 faces the bottom surface 52s of the case body 52. The adhesive sheet 10 may be provided on the side surface 52t of the case body 52. The adhesive sheet 10 may be adhered to any surface of the outer surface of the case body 52 other than the bottom surface 52s and the side surface 52t.

The case body 52 is, for example, a plastic molded product. The case body 52 includes a bottom wall portion 52a, a side wall portion 52b, and a lid portion 52c. The bottom wall portion 52a is formed in the shape of a rectangular plate, and constitutes the bottom plate of the case main body 52. The lower surface of the bottom wall portion 52a is the bottom surface 52s of the case body 52. The bottom wall portion 52a has a pair of edge portions facing in the X-axis direction and a pair of edge portions facing in the Y-axis direction. The side wall portion 52b is provided so as to extend upward from the four edges of the bottom wall portion 52a. The outer surface of the side wall portion 52b is the side surface 52t of the case body 52. The lid portion 52c is provided at the upper end portion of the side wall portion 52b and faces the bottom wall portion 52a in the Z-axis direction. In the present embodiment, the plate-shaped member constituting the lid portion 52c is formed in a rectangular shape when viewed from the Z-axis direction. The lid portion 52c may be formed of a plate-shaped member that is curved in an arch shape so as to be convex in the direction from the bottom wall portion 52a to the lid portion 52c in the Z-axis direction when viewed from the Y-axis direction. Further, the lid portion 52c is formed with slits 52h forming the outlets for the sticky notes 54a to 54f. The slit 52h penetrates in the thickness direction of the lid portion 52c. The slit 52h is formed so as to extend in the Y-axis direction at the central position of the lid portion 52c in the X-axis direction.

The sticky notes 54a to 54f are supplied one by one from the dispenser 50 as follows. For the sake of explanation, they are referred to as sticky notes 54a, 54b, 54c, 54d, 54e, 54f in order from the upper side in the stacking direction. As shown in FIG. 16, when the sticky note 54a is taken out from the dispenser 50, a part of the sticky note 54a on the end 54t side is taken out from the slit 52h to the outside of the case body 52 in advance. The user holds and pulls up the portion of the sticky note 54a on the end 1d side, that is, the portion of the sticky note 54a where the adhesive layer is not formed. At this time, the sticky note 54a is pulled out to the outside of the case body 52 through the slit 52h, and the sticky note 54b on the lower side, which is joined at the end 54s side, is pulled up. At this time, it is necessary that the joint between the sticky note 54b and the sticky note 54a is maintained. When the end portion 43s of the sticky note 54a is pulled out of the slit 52h, a part of the sticky note 54b on the end portion 54s side is also pulled out from the slit 52h. Then, the portion of the sticky note 54a on the end 54s side is peeled off from the portion of the sticky note 54b on the end 54s side. As described above, after the portion of the sticky note 54b on the end portion 54s side is exposed to the outside, it is necessary to adjust the joining force so that the sticky note 54a is peeled off from the sticky note 54b. In this state, the portion of the sticky note 54b on the end 54t side is housed in the case main body 52 together with the sticky note 54c on the lower side. As a result, the sticky note 54a is pulled out from the case body 52, and the preparation for pulling out the sticky note 54b next time is ready. Similarly, when the sticky note 54b is pulled out from the end 54s side, a part of the sticky note 54c on the end 54t side is pulled out from the slit 52h. When the sticky note 54c is pulled out from the end 54t side, a part of the sticky note 54d on the end 54s side is pulled out from the slit 52h. Similarly, the sticky notes 54e and 54f are also pulled out from the case body 52. At this time, if the adhesive force (peeling force) of the adhesive sheet 10 is higher than the force for pulling out the sticky note 54a, the movement of the dispenser 50 is suppressed and the sticky note 54a can be taken out smoothly.

As for the dispenser 50, the adhesive sheet 10 can be repeatedly adhered and re-peeled to the target 111 in the same manner as the dispenser 140 of FIG.

FIG. 17 is a cross-sectional view showing a case according to an embodiment. The case 60 shown in FIG. 17 has a case body 62 for accommodating at least one article 64 (a plurality of articles 64 in this example) and an adhesive sheet 10 provided on the bottom surface 62s (outer surface) of the case body 62. And. The back surface 12b of the adhesive layer 12 of the adhesive sheet 10 faces the bottom surface 62s of the case body 62. The adhesive sheet 10 may be provided on the side surface 62t of the case body 62.

The case body 62 is, for example, a plastic molded product. The case body 62 includes a bottom wall portion 62a and a side wall portion 62b. The bottom wall portion 62a is formed in the shape of a rectangular plate, and constitutes the bottom plate of the case main body 62. The lower surface of the bottom wall portion 62a is the bottom surface 62s of the case body 62. The bottom wall portion 62a has a pair of edge portions facing in the X-axis direction and a pair of edge portions facing in the Y-axis direction. The side wall portion 62b is provided so as to extend upward from the four edges of the bottom wall portion 62a. The outer surface of the side wall portion 62b is the side surface 62t of the case body 62. The upper end of the side wall 62b forms the edge of the opening.

The article 64 may be a general consumer good (daily necessities) including, for example, stationery, detergent, and the like. Examples of stationery include tapes, adhesive tapes, sticky notes with adhesives, writing tools, erasers, modifiers, glues, scissors, utility knives, staplers, clips, hole punches, pushpins and the like. When the article 64 is a consumer good such as a detergent, the article 64 may be liquid or powdery. In that case, the case 60 has a lid portion that closes the opening formed by the upper end portion of the side wall portion 62b, and a mechanism for taking out the article 64, such as a pump.

As for the case 60, the adhesive sheet 10 can be repeatedly adhered and re-peeled to the target 111 in the same manner as the dispenser 140 of FIG.

Although the preferred embodiments of the present disclosure have been described in detail above, the present disclosure is not limited to the above embodiments.

For example, the above-mentioned adhesive sheets 10, 110, 210, 310, 410 may be adhered to other articles (for example, entrance mats or gloves) for temporary fixing or non-slip. In this case, the back surface 12b of the adhesive layer 12 is adhered to the article. As a result, the adhesion and re-peeling of the article to the target 111 can be repeated.

Hereinafter, the present disclosure will be described in more detail with reference to Examples, but the present disclosure is not limited to these Examples.

(Example 1)
By processing a metal flat plate using a diamond bite, a mold having a plurality of evenly arranged quadrangular pyramid structures was produced. The angle between the bottom surface and the side surface of the quadrangular pyramid (corresponding to θ in FIG. 5) is 29 °, the distance between the vertices of adjacent quadrangular pyramids (corresponding to α in FIG. 5 or b in FIG. 8) is 90 μm, and the quadrangular pyramid The height (corresponding to H in FIG. 5) was 26 μm. The size of the quadrangular pyramid was measured by observing the surface of the mold with a high-precision microscope and selecting one of the quadrangular pyramid structures in which the clearest image can be observed.

Next, a base liner is prepared in which layers made of polyethylene (PE) are provided on both sides of a sheet made of polyethylene terephthalate (PET), and a peeling surface is provided by applying a silicone coating to one of the PE layers. did. A mold was applied to the peeled surface of the base liner, and the microstructure of the mold was transferred to the base liner by heat pressing to prepare a liner having a fine structure (hereinafter, also referred to as a microstructure liner). The heat press was performed at a temperature of 120 ° C. and a pressure of 6 MPa for 3 minutes. The microstructure of the microstructure liner had substantially the same size as the microstructure of the mold.

Next, a polyurethane solution having the composition shown in Table 1 below was prepared.

Next, the solid content of the polyurethane solution was adjusted to 30% by mass using a solvent in which isopropyl alcohol and distilled water were mixed at a mass ratio of 1: 1. After applying the prepared polyurethane solution on the microstructure of the microstructure liner, the excess solution was scraped off with a doctor blade. Then, by heating in an oven at 80 ° C. for 4 minutes and at 100 ° C. for 4 minutes to volatilize the solvent contained in the solution, a solid urethane resin (corresponding to the first part) is formed into a quadrangular pyramid of a microstructure liner. It was placed at the bottom of the structure.

Next, an acrylic adhesive solution was applied onto the microstructure of the microstructure liner. The acrylic adhesive solution comprises 66.1% by mass of an acrylic resin adhesive, 0.8% by mass of a cross-linking agent and 33.1% by mass of methyl ethyl ketone. Then, it was heated in an oven at 65 ° C. for 3 minutes and at 85 ° C. for 3 minutes to volatilize the solvent contained in the solution to form a solid acrylic adhesive layer (thickness 35 μm). The solid acrylic adhesive layer comprises a portion (corresponding to a second portion) located within the quadrangular pyramid structure of the microstructure liner and a base that supports the second portion.

Next, a carrier (stretched polypropylene film) on which a thermoplastic polyurethane layer having a thickness of 150 μm was formed was laminated on the acrylic adhesive layer so that the thermoplastic polyurethane layer faces the acrylic adhesive layer. Lamination was performed at room temperature under the condition of a ^{nip pressure of 2 kg / cm 2.}

Next, the carrier (stretched polypropylene film) was peeled off. The thermoplastic polyurethane layer remained on the acrylic adhesive layer. Then, a double-sided tape (trade name: PSD-20, manufactured by 3M) made of an acrylic foam tape having a thickness of 0.8 mm was laminated on the surface of the thermoplastic polyurethane layer. Lamination was done at room temperature. The thermoplastic polyurethane layer and the acrylic foam tape correspond to the cushion layer.

In this way, the adhesive sheet of Example 1 was produced. When using the adhesive sheet, the liner of the double-sided tape and the fine structure liner were peeled off.

(Example 2)
Acrylic consisting of 69.9% by weight acrylic adhesive, 2.1% by weight isocyanate cross-linking agent, 14.0% by weight methyl ethyl ketone and 14.0% by weight heptane in forming the second portion and base. An adhesive sheet of Example 2 was prepared in the same manner as in Example 1 except that an adhesive was used.

(Example 3)
An adhesive sheet of Example 3 was prepared in the same manner as in Example 1 except that the solid content of the polyurethane solution was adjusted to 20% by mass when the first portion was formed.

(Example 4)
The adhesive sheet of Example 4 was prepared in the same manner as in Example 2 except that the solid content of the polyurethane solution was adjusted to 20% by mass when the first portion was formed.

(Example 5)
The adhesive sheet of Example 5 was prepared in the same manner as in Example 1 except that the solid content of the polyurethane solution was adjusted to 10% by mass when the first portion was formed.

(Example 6)
The adhesive sheet of Example 6 was prepared in the same manner as in Example 2 except that the solid content of the polyurethane solution was adjusted to 10% by mass when the first portion was formed.

(Example 7)
In the same manner as in Example 1, a solid urethane resin (corresponding to the first portion) is arranged at the bottom of the square pyramid structure of the microstructure liner, and then instead of applying the acrylic adhesive solution, the fine structure is used. An adhesive film (trade name: FTW9953J, manufactured by 3M) was laminated on the structural liner. The adhesive film consists of a second liner, an adhesive layer (having irregularities on the second liner side) provided in order on the second liner, and a polyvinyl chloride layer (thickness 100 μm) provided on the adhesive layer. It is composed of a polyurethane transparent layer (thickness 20 μm) provided on the polyvinyl chloride layer and a PET film provided on the polyurethane transparent layer. Lamination was performed under the conditions of ^{50 ° C. and a nip pressure of 2 kg / cm 2} with the second liner of the adhesive film removed and the adhesive layer of the adhesive film facing the solid urethane resin on the microstructure liner. ..

Next, after peeling off the PET film, a double-sided tape (trade name: PSD-20, manufactured by 3M) made of a 0.8 mm thick acrylic foam tape was laminated on the polyurethane transparent layer of the adhesive film. Lamination was done at room temperature. In this way, the adhesive sheet of Example 7 was produced. When using the adhesive sheet, the liner of the double-sided tape and the fine structure liner were peeled off. At the time of use, the adhesive sheet of Example 7 contains a solid urethane resin (corresponding to the first portion), an adhesive layer, a polyvinyl chloride layer provided on the adhesive layer, and a polyvinyl chloride layer. It consists of a polyurethane transparent layer and an acrylic foam tape layer provided above. The adhesive layer consists of a second portion and a base that supports the second portion. The polyvinyl chloride layer, the polyurethane transparent layer, and the acrylic foam tape layer form a cushion layer.

(Example 8)
The first portion was formed in the same manner as in Example 1 except that the solid content of the polyurethane solution was adjusted to 20% by mass. Then, in the same manner as in Example 1, a solid acrylic adhesive layer (thickness 35 μm) composed of the second portion and the base portion was formed. Then, without laminating the carrier, a double-sided tape (trade name: PSD-20, manufactured by 3M) made of an acrylic foam tape having a thickness of 0.8 mm was laminated on the acrylic adhesive layer. Lamination was done at room temperature.

In this way, the adhesive sheet of Example 8 was produced. When using the adhesive sheet, the liner of the double-sided tape and the fine structure liner were peeled off. At the time of use, the adhesive sheet of Example 8 comprises a solid urethane resin (corresponding to the first portion), an adhesive layer, and a double-sided tape provided on the adhesive layer. The adhesive layer consists of a second portion and a base that supports the second portion. Double-sided tape corresponds to the cushion layer.

(Example 9)
The adhesive sheet of Example 9 was prepared in the same manner as in Example 8 except that the solid content of the polyurethane solution was adjusted to 10% by mass when the first portion was formed.

(Reference example 1)
A double-sided tape (trade name: PSD-20, manufactured by 3M) made of an acrylic foam tape having a thickness of 0.8 mm was cut into a size of 20 mm × 20 mm to prepare an adhesive sheet of Reference Example 1. When using double-sided tape, the liner was peeled off.

(Evaluation results)
The following evaluations were performed on the adhesive sheets of Examples 1 to 9 and Reference Example 1.

(Peeling force)
After adhering the adhesive sheets of Examples 1 to 9 and Reference Example 1 cut to a size of 20 mm × 20 mm to one plate-shaped portion of an L-shaped SUS plate composed of two plate-shaped portions, the adhesive sheet Was adhered to a SUS plate (hereinafter referred to as BA plate) that had been brightly annealed. Each adhesive sheet is sandwiched between one plate-shaped portion of the L-shaped SUS plate and the BA plate. In the adhesive sheets of Examples 1 to 9, the surface having the fine structure of the adhesive layer is adhered to the BA plate. The other plate-shaped portion of the L-shaped SUS plate extends perpendicular to the one plate-shaped portion. The other plate-shaped portion of the L-shaped SUS plate projects from the BA plate through the adhesive layer toward one plate-shaped portion of the L-shaped SUS plate.

Next, with respect to one plate-shaped portion of the L-shaped SUS plate, the adhesive layer and the BA plate, 0 kg (actually, there is a load due to the mass of the BA plate of 0.037 kg), 1 kg, 2 kg or 5 kg. A load was applied from the BA plate side for 10 seconds. 10 seconds corresponds to the time for a normal user to press the adhesive sheet against the target. 1 kg and 2 kg correspond to the force by which a normal user presses the adhesive sheet against the target. Then, using a tensile tester, the other plate-shaped portion of the L-shaped SUS plate was pulled up in the direction from the BA plate through the adhesive layer toward one plate-shaped portion of the L-shaped SUS plate. Thereby, the peeling force of each adhesive sheet was measured. The peeling force is measured according to JIS Z 0237: 2009 under the conditions of a temperature of 23 ° C. and a tensile speed of 300 mm / min. The peeling force corresponds to the action of a normal user re-peeling the adhesive sheet from the target. The evaluation results are shown in FIGS. 18 (a) to 18 (d) and FIGS. 19 (a) to 19 (b).

18 (a) to (d) and 19 (a) to 19 (b) are graphs showing the relationship between the load and the peeling force. FIG. 18A shows the peeling force (integral average value) of the adhesive sheets of Examples 1, 3, 5, and 1 and Reference Example 1. FIG. 18B shows the peeling force (integral average value) of the adhesive sheet of Examples 2, 4 and 6 and Reference Example 1. FIG. 19A shows the peeling force (integral average value) of the adhesive sheets of Examples 8 and 9 and Reference Example 1. The average value of the integration is the average value of the peeling force calculated by integrating the peeling force measured when peeling each adhesive sheet by 90 ° over a length of 20 mm. FIG. 18C shows the peeling force (maximum value) of the adhesive sheet of Examples 1, 3, 5, and 7 and Reference Example 1. FIG. 18D shows the peeling force (maximum value) of the adhesive sheet of Examples 2, 4 and 6 and Reference Example 1. FIG. 19B shows the peeling force (maximum value) of the adhesive sheets of Examples 8 and 9 and Reference Example 1. The maximum value is the maximum value (peak value) of the peeling force measured when peeling each adhesive sheet by 90 ° over a length of 20 mm. The straight line in FIG. 18 shows a linear approximation straight line of each data. The dotted line in FIG. 19 shows a linear approximation straight line of the data of Reference Example 1.

As shown in FIGS. 18A and 18C, the peeling force of the adhesive sheets of Examples 1, 3, 5, 7 and Reference Example 1 increased as the load increased. Under a load of 2 kg or less, the adhesive sheets of Examples 1, 3, 5, and 7 had a peeling force smaller than the peeling force of the adhesive sheet of Reference Example 1. At a load of 5 kg, the adhesive sheets of Examples 3, 5 and 7 had a peeling force smaller than the peeling force of the adhesive sheet of Reference Example 1, but the adhesive sheet of Example 1 had a peeling force of Reference Example. It had a peeling force larger than the peeling force of the adhesive sheet of 1.

As shown in FIGS. 18 (b) and 18 (d), the peeling force of the adhesive sheets of Examples 2, 4 and 6 and Reference Example 1 increased as the load increased. Under a load of 5 kg or less, the adhesive sheets of Examples 2, 4 and 6 had a peeling force smaller than the peeling force of the adhesive sheet of Reference Example 1.

As shown in FIGS. 19A and 19B, at a load of 0 kg, the adhesive sheets of Examples 8 and 9 had a peeling force smaller than the peeling force of the adhesive sheet of Reference Example 1. .. On the other hand, at a load of 1 kg or 2 kg, the adhesive sheets of Examples 8 and 9 had a peeling force equivalent to that of the adhesive sheet of Reference Example 1.

As described above, the peeling force of the adhesive sheets of Examples 1 to 9 was very small at a load of 0 kg, but increased to some extent at a load of 1 to 5 kg. This is because the solid urethane resin of the adhesive sheet (corresponding to the first part) comes into contact with the BA plate at a load of 0 kg, while the adhesive layer (corresponding to the second part and the base) of the adhesive sheet at a load of 1 to 5 kg. It is probable that (corresponding) came into contact with the BA plate. The adhesive sheet has high slideability with respect to the target when the user does not press the adhesive sheet against the target (load 0 kg), and after the user presses the adhesive sheet against the target, the adhesive sheet is against the target. Can exhibit high adhesiveness. Further, the peeling force of the adhesive sheet can be adjusted by changing the material of the adhesive layer of the adhesive sheet, the solid content of the polyurethane solution for forming the solid urethane resin, and the like.

(Removability)
After adhering the adhesive sheet (size of 20 mm × 20 mm) of Example 7 to one plate-shaped portion of the L-shaped SUS plate composed of two plate-shaped portions, the adhesive sheet was adhered to the surface of the target. The adhesive sheet is sandwiched between one plate-shaped portion of the L-shaped SUS plate and the surface of the target. The surface having the fine structure of the adhesive layer is adhered to the surface of the object. The other plate-shaped portion of the L-shaped SUS plate extends perpendicular to the one plate-shaped portion. The other plate-shaped portion of the L-shaped SUS plate projects from the object through the adhesive layer in the direction toward one plate-shaped portion of the L-shaped SUS plate. The subject is a wooden desk with a varnished surface or a painted metal locker.

Next, a load of 1 kg was applied to one plate-shaped portion, the adhesive layer and the target of the L-shaped SUS plate from the L-shaped SUS plate side for 10 seconds.

Next, by using a digital force gauge (trade name: RZ-50, manufactured by Aiko Engineering Co., Ltd.), the other plate-shaped portion of the L-shaped SUS plate is pulled up in the direction perpendicular to one plate-shaped portion. The peeling force (peak value) when the adhesive sheet was peeled from the subject was measured.

Next, the sample measured above was reattached to the subject for 10 seconds under a load of 1 kg, and then the peeling force when the adhesive sheet was re-peeled from the subject was measured. The peeling force was measured 30 times by alternately repeating the operations of adhesion and re-peeling. The bonding and re-peeling operations were repeated without intervals. The evaluation results are shown in FIG.

FIG. 20 is a graph showing the relationship between the number of repetitions (the number of times of re-peeling) and the peeling force. When the number of repetitions is 0, the adhesive layer of the adhesive sheet is in contact with the surface of the object, but no load is applied. The dotted line in FIG. 20 shows a linear approximation straight line of each data.

As shown in FIG. 20, the peeling force of the adhesive sheet of Example 7 was 5N or more and 20N or less in the case of a desk, and 10N or more and 20N or less in the case of a locker, at least up to 30 times of repetition. For example, the force for removing a portion of a roll-shaped article from a dispenser is less than 10 N (usually less than 5 N). For example, the force for taking out a part (sticky note) of a sheet-like article from a dispenser is less than 15 N (usually 10 N or less) when the sheet size is 75 mm × 75 mm. Therefore, when the dispenser is adhered to the surface of the desk by the adhesive sheet of Example 7, the size of the adhesive sheet can be adjusted in order to exert a sufficient peeling force according to the type of the article. For example, in the case of a roll-shaped article, a 20 mm × 20 mm adhesive sheet can be used. For example, in the case of a sheet-shaped article having a size of 75 mm × 75 mm, an adhesive sheet having a size of 20 mm × 50 mm can be used. In these cases, the adhesive sheet does not peel off from the subject when the portion of the roll-shaped article or sheet-shaped article is taken out from the dispenser. Therefore, when the portion of the roll-shaped article or the sheet-shaped article is taken out from the dispenser, the dispenser is suppressed from being lifted together with the portion of the roll-shaped article or the sheet-shaped article. In addition, when the user peels from the target to change the position, or peels from the target to replace or refill the contents, at least 30 times in the peeling and bonding steps. It can be used continuously without significantly reducing the peeling force. Further, the adhesive sheet can be re-peeled from the desk by applying a force to the dispenser to apply a peeling force exceeding 20 N per 20 mm × 20 mm to the adhesive sheet. Similarly, if the condition that the peeling force of the adhesive sheet is larger than the force of taking out the article is satisfied, the dispenser can be installed on the vertical surface and can be used repeatedly.

12a ... front surface, 12b ... back surface (surface opposite to the front surface), 2 ... top, 4,14 ... first part, 5,15 ... second part, 10,110,210,310,410 ... adhesion Agent sheet, 10e ... one end, 10m ... center, 12,212 ... adhesive layer, 13,113 ... microstructure, 44a, 44b ... part, 40,50,140 ... dispenser, 42s, 52s, 62s ... bottom surface (outer surface) , 60 ... Case, 44 ... Tape-like article (roll-like article), 44s ... Base sheet, 44t ... Adhesive layer, 54 ... Laminate (sheet-like article), 54a, 54b, 54c, 54d, 54e, 54f ... Sticky notes (plural parts), 64 ... articles, 102, 104 ... cushion layers.

Claims (9)

The case body for storing goods and
An adhesive sheet provided on the outer surface of the case body and
With
The adhesive sheet has an adhesive layer having a fine structure on the surface, and has an adhesive layer.
The surface of the adhesive layer opposite to the surface faces the outer surface.
The microstructure includes a plurality of convex structures.
The convex structure has two or more portions, and the first portion present at the top of the convex structure is made of a non-adhesive or first adhesive material, which is more than the first portion. A case in which a second portion located far from the top is made of a second adhesive material having a higher adhesiveness than the material of the first portion. The case according to claim 1, wherein the adhesive sheet further includes a cushion layer provided on a surface of the adhesive layer opposite to the surface of the adhesive layer. The adhesive sheet extends in the first direction on the outer surface of the case body.
The case according to claim 1 or 2, wherein the width of the adhesive sheet at one end in the first direction is smaller than the width of the adhesive sheet at the center of the first direction. A portion separated from the sheet-like article, which is a sheet-like article that can be separated into a plurality of portions and includes a base material sheet and an adhesive layer provided on at least a part of the surface of the base material sheet. It ’s a dispenser to do
The dispenser according to any one of claims 1 to 3. The dispenser according to claim 4, wherein the sheet-shaped article is a tape-shaped article. The dispenser according to claim 4, wherein the sheet-shaped article is a laminated body including a plurality of laminated sticky notes. An adhesive layer with a fine structure on the surface,
A cushion layer provided on a surface of the adhesive layer opposite to the surface thereof,
With
The microstructure includes a plurality of convex structures.
The convex structure has two or more portions, the first portion present at the top of the convex structure is made of a non-adhesive or first adhesive material and below the first portion. The second portion present on the side is an adhesive sheet made of a second adhesive material having higher adhesiveness than the material of the first portion. The adhesive layer is the first adhesive layer,
The adhesive sheet according to claim 7, wherein the cushion layer includes a second adhesive layer made of a third adhesive material different from the second adhesive material. With an adhesive layer with a microstructure on the surface,
The microstructure includes a plurality of convex structures.
The convex structure has two or more portions, and the first portion present at the top of the convex structure is made of a non-adhesive or first adhesive material and is below the first portion. The second portion present on the side is made of a second adhesive material having a higher adhesiveness than the material of the first portion.
The second portion is an adhesive sheet that constitutes a cushion layer located on a surface of the adhesive layer opposite to the surface.

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