Adhesive product and container with adhesive product

Abstract

To provide an adhesive product capable of preventing starch from remaining on an object and a substrate from being broken while securing adhesive force and a container with adhesive product therewith.SOLUTION: An adhesive product 4 includes a substrate 5 and a plurality of adhesive parts 7 provided on one surface of the substrate 5 and arranged at intervals. Each adhesive portion 7 is a polygon having three or more vertices 71 and a plurality of sides 72 connecting adjacent vertices 71, and at least one side 72 is concavely curved.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an adhesive product and a container with an adhesive product provided therewith. [Background technology]

[0002] Patent Document 1 describes a conventional adhesive product. The adhesive product described in Patent Document 1 includes a substrate and two or more adhesive dots provided on one surface of the substrate. In the adhesive product described in Patent Document 1, the proportion of the adhesive dots per unit area of ​​the substrate is set within a predetermined range, so that the adhesive product can be less likely to damage the object (the adherend in Patent Document 1) when peeled off from the object.

[0003] The adhesive dots are adhesive dots that are formed in a circular shape. Patent Document 1 also describes that the adhesive dots can have shapes such as polygonal shapes in addition to circular shapes. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-181054 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when the adhesive dots are formed in a circular shape or a polygonal shape consisting of multiple straight sides, as in the adhesive product described in Patent Document 1 above, there is a problem that even if the area ratio of the adhesive dots is within a specified range, when the adhesive product is peeled off, glue may remain on the object or the substrate may be torn.

[0006] The present invention has been made in consideration of the above circumstances, and aims to provide an adhesive product that can ensure adhesive strength while preventing glue from remaining on the object or the substrate from being torn, and an adhesive product-equipped container equipped with the same. [Means for solving the problem]

[0007] An adhesive product according to one aspect of the present invention comprises a substrate and a plurality of adhesive portions provided on one surface of the substrate and arranged at intervals, each of the adhesive portions being a polygon having three or more vertices and a plurality of sides connecting adjacent vertices, with at least one of the sides being concavely curved.

[0008] In the pressure-sensitive adhesive product according to the present invention, in the above-described aspect, it is preferable that at least two adjacent sides are concavely curved.

[0009] In the pressure-sensitive adhesive product according to the present invention, in the above-described aspect, it is preferable that each of the sides is concavely curved.

[0010] In the pressure-sensitive adhesive product according to the present invention, in the above aspect, it is preferable that each of the adhesive portions is formed in a triangular shape having three vertices.

[0011] Furthermore, in the adhesive product according to the present invention, in the above-described aspect, it is preferable that each of the sides passes through a point on a second virtual line segment connecting the midpoint of a first virtual line segment connecting the adjacent vertices and the centroid of the adhesive portion, the point being 10% or more of the length dimension of the second virtual line segment from the midpoint toward the centroid.

[0012] Furthermore, in the adhesive product of the present invention, in the above-mentioned aspect, the plurality of adhesive portions have a first row in which the plurality of adhesive portions are arranged in a first direction, and a second row in which the plurality of adhesive portions are arranged in the first direction and are shifted relative to the first row in a second direction perpendicular to the first direction, and it is preferable that each of the adhesive portions in the first row and the second row is formed in a shape that is symmetrical in the first direction and asymmetrical in the second direction, and each of the adhesive portions in the second row is formed in a shape that is inverted in the second direction relative to each of the adhesive portions in the first row.

[0013] In addition, in the above-mentioned aspect of the adhesive product according to the present invention, It is preferable that each of the glue portions in the second row is also offset in the first direction relative to each of the glue portions in the first row, and that each of the glue portions in the second row overlaps with the multiple glue portions in the first row by 30% or more of the dimension in the second direction of each of the glue portions in the second row when viewed along the first direction.

[0014] In addition, in the adhesive product according to the present invention, it is preferable that the centroid of each adhesive portion in the second row overlaps with the adhesive portion in the first row when viewed along the first direction.

[0015] A container with an adhesive product according to one aspect of the present invention comprises the adhesive product according to the above aspect and a container to which the adhesive product is attached. [Effects of the Invention]

[0016] The adhesive product of the above aspect of the present invention and the container with adhesive product equipped therewith have the advantage that they can ensure adhesive strength while preventing glue from remaining on the object or the substrate from being torn. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view of a container with an adhesive product according to one embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of the above-mentioned adhesive product-attached container. [Figure 3] Fig. 3(A) is a view of the back side of the adhesive product, and Fig. 3(B) is an enlarged view of part A in Fig. 3(A). [Figure 4] FIG. 4 is a diagram for explaining the shape of the adhesive portion of the same. [Figure 5] Fig. 5(A) is an explanatory diagram of when an interface that is not parallel to the first virtual line segment approaches the glue portion, and Fig. 5(B) is an explanatory diagram of when an interface that is parallel to the first virtual line segment approaches the glue portion. [Figure 6] FIG. 6 is a view of the adhesive product according to the modified example as seen from the back side. [Figure 7]FIG. 7 is a view of a pressure-sensitive adhesive product according to a further modified example, seen from the back side. [Figure 8] FIG. 8 is a diagram showing test results of the examples and comparative examples. DETAILED DESCRIPTION OF THE INVENTION

[0018] <Embodiment> (1) Overall As shown in Fig. 1, the container 1 with an adhesive product according to this embodiment has an adhesive product 4 attached to the top surface of a container 2. The contents of the container 2 are not particularly limited and may be, for example, a liquid, a solid, a gas, or a combination thereof. Examples of liquid contents include beverages, medicines, lotions, etc., and examples of medicines include deodorants, air fresheners, etc. Here, a deodorant, which is a liquid medicine, will be described as an example of the contents.

[0019] (2) Container The container 2 is an object to which the adhesive product 4 is attached. The container 2 includes a container body 21 and a cover 3, as shown in FIG.

[0020] The container body 21 is a portion capable of accommodating the contents, is hollow, and has an opening at the top end. The opening of the container body 21 is closed by a removably attached cap 22. A strip-shaped liquid-absorbent wick extending in the vertical direction is attached to the underside of the top plate of the cap 22, and the liquid-absorbent wick can be exposed from the container body 21 by lifting the cap 22. The container body 21 can hold the liquid-absorbent wick in a lifted position. The liquid-absorbent wick allows the liquid medicine in the container body 21 to volatilize to the outside of the container 2.

[0021] The cover 3 covers the liquid-absorbent core in the pulled-up state. The cover 3 is removably attached to the container body 21. The cover 3 is attached to the container body 21 by, for example, fitting, recess-and-projection fitting, screwing, or a snap-fit ​​structure. The cover 3 is composed of a substantially cylindrical peripheral wall 31 whose central axis extends in the vertical direction, and a top plate 32 that closes the upper end of the peripheral wall 31.

[0022] The cover 3 has a plurality of ventilation holes 33. The plurality of ventilation holes 33 are formed in both the top plate 32 and the peripheral wall 31, and penetrate the top plate 32 or the peripheral wall 31. The plurality of ventilation holes 33 allow the liquid medicinal solution that has evaporated from the container body 21 to be released to the outside of the cover 3. There are no particular limitations on the shape of the ventilation holes 33, and various shapes may be adopted in consideration of design and functionality, such as round holes, elongated holes, holes resembling leaves or petals, and arc-shaped holes.

[0023] (3) Adhesive products The adhesive product 4 is removably attached to the container 2. Examples of the adhesive product 4 include product labels with a trademark or other design printed on them, design labels, POP labels (attention labels), sealing labels, strip labels that seal the container and lid, temperature-indicating labels, water-off labels, and ingredient lists that list the ingredients of the contents. The adhesive product 4 may be attached to any part of the container body 21 or the cover 3, but here, as an example, a product label attached to the top surface of the top plate 32 of the cover 3 will be described.

[0024] Here, Fig. 3 shows the back side of the adhesive product. As shown in Fig. 3, the adhesive product 4 includes a base material 5 and a plurality of adhesive portions 7. The adhesive product 4 is attached to the container 2 by providing a plurality of adhesive portions 7 on one side of the base material 5. The adhesive product 4 according to this embodiment is designed to have both a certain adhesive strength to the container 2 and ease of peeling from the container 2.

[0025] Here, "certain adhesive strength" means adhesive strength strong enough to prevent the adhesive product 4 from peeling off from the container 2 during production or distribution. In this specification, having a certain adhesive strength is referred to as "having adhesive properties" or "having adhesive properties." "Ease of peeling" means the ease with which the adhesive product 4 can be peeled off from the container 2 without tearing the substrate 5 or leaving glue behind. In this specification, having the property of being easily peelable is referred to as "having releasability," "having releasability," "high releasability," etc.

[0026] (3.1) Base material The substrate 5 functions as a support having a printed layer on its front surface and a plurality of adhesive portions 7 on its back surface. The material of the substrate 5 is not particularly limited, and examples thereof include a resin-based substrate, a paper-based substrate, a rubber-based substrate, a fiber-based substrate, a wood-based substrate, and a metal-based substrate.

[0027] Examples of resin-based substrates include polyolefin-based resins, polyester-based resins, polyvinyl chloride-based resins, polyamide-based resins, polyimide-based resins, fluorine-based resins, polystyrene-based resins, and cellulose-based resins. Examples of paper-based substrates include Japanese paper, Western paper, high-quality paper, art paper, glassine paper, kraft paper, Clupak paper, crepe paper, clay-coated paper, top-coated paper, resin-laminated paper, and resin-coated paper. Examples of rubber-based substrates include natural rubber and synthetic rubber. Examples of fiber-based substrates include natural fibers (e.g., cotton, hemp, silk, and the like) and chemical fibers (e.g., rayon, acetate fiber, polyester fiber, polyvinyl alcohol fiber, polyamide fiber, polyolefin fiber, and the like). Two or more of these substrates 5 may be laminated to form a laminate, or may be formed as a single layer.

[0028] The substrate 5 is formed in a sheet or film shape and has flexibility. The thickness of the substrate 5 is not particularly limited as long as it is flexible, but is, for example, 30 μm to 200 μm, and preferably 50 μm to 150 μm.

[0029] The substrate 5 is formed in a substantially circular shape in a plan view. However, the shape of the substrate 5 is not particularly limited in the present invention, and may be, for example, a substantially triangular shape, a substantially rectangular shape, a polygonal shape with pentagons or more, an oval shape, a heart shape, a star shape, etc. The printed layer provided on the front surface of the substrate 5 is printed with, for example, letters, designs, coloring, etc. However, the printed layer may be omitted, and a plain, single-color decorative layer may be used, or the front surface of the substrate 5 may constitute the front surface of the adhesive product 4.

[0030] (3.2) Glue part The adhesive portion 7 is an adhesive portion of the adhesive product 4, and is disposed between the container 2 and the substrate 5. A plurality of adhesive portions 7 are provided over substantially the entire back surface of the substrate 5, and are spaced apart. As shown in FIG. 3(B), each adhesive portion 7 is surrounded by an adhesive-blocking portion 6 and is formed in a polygonal shape.

[0031] The adhesive-blocking portion 6 refers to a portion with weaker adhesive strength than the adhesive portion 7, and in this case refers to a portion with no adhesive strength. The adhesive-blocking portion 6 is formed, for example, by applying glue to the entire back surface of the base material 5 without any gaps (so-called "solid coating"), and then laminating varnish on the adhesive surface of the glue in a portion corresponding to the periphery of the adhesive portion 7. The adhesive-blocking portion 6 may also be formed in a portion of one surface of the base material 5 where no glue is provided. The adhesive-blocking portion 6 may also be formed by other methods, such as using a film.

[0032] 4, each adhesive portion 7 is formed in a polygonal shape made up of three or more vertices 71 and a plurality of sides 72 connecting adjacent vertices 71. There are no particular limitations on the adhesive portion 7 as long as it is polygonal, and it may be, for example, a triangular shape, a quadrilateral shape (square shape, rectangle shape, rhombus shape, parallelogram shape), a pentagonal shape, a trapezoidal shape, etc., but here, a triangular shape will be described as an example.

[0033] In this embodiment, there are three vertices 71. Each vertex 71 may be an obtuse angle or an acute angle. The "vertex 71" here means a protruding corner based on the adhesive portion 7, and the pair of sides 72 forming the vertex 71 do not have to be straight lines.

[0034] All of the sides 72 are curved concavely. "Concavely curved" here means that at least a portion of the side 72 is curved in a direction that concaves the adhesive portion 7. In this embodiment, the entire length of one side 72 is an arc (minor arc), but for example, straight lines may be interposed between both ends of the arc and the vertex 71. Furthermore, the curved portion of the side 72 does not have to be an arc, but may be a free curve, or may be formed into a roughly arc shape by connecting multiple obtuse angles. However, it is preferable that the point of contact between the curve and the straight line is smooth and continuous.

[0035] All of the sides 72 are located closer to the centroid 75 of the glue portion 7 than the imaginary line segment connecting the adjacent vertices 71 (this may be referred to as the "first imaginary line segment 73"). Furthermore, it is preferable that each side 72 passes through a point on the imaginary line segment connecting the midpoint M1 of the first imaginary line segment 73 to the centroid 75 (this may be referred to as the "second imaginary line segment 74"), which is 10% or more of the length dimension of the second imaginary line segment 74, from the midpoint M1 toward the centroid 75. In other words, if the intersection of the second imaginary line segment 74 and each side 72 is defined as point P1, it is preferable that the dimension L1 between the midpoint M1 of the first imaginary line segment 73 and point P1 is 10% or more of the length dimension L2 of the second imaginary line segment 74.

[0036] If it is desired to increase the releasability while ensuring the adhesiveness of the adhesive product 4, it is preferable that the dimension L1 be 50% or more and 80% or less of the dimension L2. On the other hand, if it is desired to increase the adhesive strength while maintaining the easy releasability of the adhesive product 4, it is preferable that the dimension L1 be 10% or more and 50% or less of the dimension L2. And, if it is desired to achieve both releasability and adhesiveness, it is preferable that the dimension L1 be 40% or more and 70% or less of the dimension L2. In this specification, the term "virtual line segment" refers to a conceptual line segment that does not actually appear on the product.

[0037] In this way, by changing the area of ​​the adhesive portion 7, the adhesiveness and releasability of the adhesive product 4 can be adjusted depending on the material and shape of the container 2, but by curving each side 72 of the adhesive portion 7 in a concave shape, it is possible to achieve the effect of improving releasability while maintaining adhesiveness.

[0038] 5(A) and 5(B) show the interface between the peeled adhesive product 4 and the container 2 when the adhesive product 4 is peeled off from the container 2 as a straight line X1. If the interface X1 is non-parallel to the first imaginary line segment 73, when the interface X1 approaches the adhesive portion 7, the interface X1 first hits the vertex 71 without hitting any of the sides 72. Because the vertex 71 is more easily peeled off than other portions, the peeling of the vertex 71 serves as a trigger for peeling off the adhesive portion 7 without tearing the substrate 5 or leaving any adhesive residue.

[0039] Furthermore, when the interface (straight line X2) is parallel to the first imaginary line segment 73, as the interface X2 approaches the adhesive portion 7, the interface X2 also first hits the vertex 71 without hitting any of the sides 72. In this case, the interface X1 also hits the vertices 71 at both ends of the second imaginary line segment 74, and peeling of the vertices 71 triggers peeling of the adhesive portion 7. Therefore, when the adhesive product 4 is peeled from the container 2, the substrate 5 is less likely to tear or adhesive to remain, regardless of the position on the outer periphery of the adhesive product 4 from which it is peeled, and peelability can be improved.

[0040] From the viewpoint of adhesiveness and releasability, the size of each adhesive portion 7 is preferably a size that fits within a rectangular frame with one side of 3 mm to 10 mm. When the adhesive portion 7 fits within a rectangular frame with one side of 10 mm or less, appropriate releasability can be obtained. On the other hand, when the adhesive portion 7 fits within a rectangular frame with one side of 3 mm or more, appropriate adhesiveness can be obtained. Here, "a size that fits within a rectangular frame" means that at least one vertex 71 of the multiple vertices 71 is located on the frame and the size of the adhesive portion 7 is the largest size that can be taken within the frame.

[0041] The adhesive constituting the adhesive portion 7 is not particularly limited, and may be, for example, a general adhesive such as an acrylic, rubber, urethane, polyester, polyether, polyamide, silicone, or epoxy adhesive. These adhesives may be used alone or in combination of two or more.

[0042] 3(A), the adhesive portion 7 having such a configuration is arranged so as to be spread over substantially the entire surface of the back surface of the substrate 5. The ratio of the adhesive portion 7 to the back surface of the substrate 5 (area ratio per unit area) is, for example, preferably 20% or more and 70% or less, and more preferably 30% or more and 60% or less.

[0043] Here, as shown in FIG. 3(B), one of the directions in which the multiple glue sections 7 arranged in the same direction are arranged is defined as a first direction, and the direction perpendicular to the first direction on the substrate 5 is defined as a second direction. Here, the horizontal direction is exemplified as the first direction, and the vertical direction is exemplified as the second direction. Furthermore, among the multiple glue sections 7, a row of glue sections 7 arranged in the horizontal direction is defined as a "first row 81," and another row of glue sections 7 adjacent to the first row 81 is defined as a "second row 82." The multiple glue sections 7 according to this embodiment are configured by multiple glue rows 8 arranged in the vertical direction, each group consisting of an adjacent first row 81 and a second row 82. Therefore, hereinafter, the relationship between the first row 81 and the second row 82 in one glue row 8 will be mainly described, and the other glue rows 8 will not be described because they have the same configuration.

[0044] The first row 81 is made up of a plurality of glue sections 7 arranged in the horizontal direction, and all of the glue sections 7 are formed to the same size and shape. A glue-blocking section 6 is interposed between the horizontal edges 72 of adjacent glue sections 7, i.e., the vertices 71 of adjacent glue sections 7 are spaced apart from each other. However, in the present invention, adjacent glue sections 7 may be partially connected.

[0045] The second row 82 is composed of a plurality of glue portions 7 arranged in the horizontal direction, similar to the first row 81, and all of the glue portions 7 are formed to the same size and shape. The second row 82 is shifted in the vertical direction relative to the first row 81. Each glue portion 7 in the second row 82 is formed to have a shape that is vertically inverted relative to each glue portion 7 in the first row 81.

[0046] The distance between adjacent glue portions 7 in the first row 81 is preferably 0.1 mm or more and 2.0 mm or less, and more preferably 0.3 mm or more and 1.0 mm or less. The distance between adjacent glue portions 7 in the second row 82 is preferably the same as that in the first row 81. Here, "dimension between adjacent glue portions 7" refers to the minimum value of the dimensions of the glue-blocking portions 6 between adjacent glue portions 7 in the horizontal direction. In this embodiment, this refers to the distance between the vertex 71 of one glue portion 7 and the vertex 71 of the other glue portion 7 of adjacent glue portions 7.

[0047] Incidentally, each glue portion 7 according to this embodiment is a polygon that is symmetrical in the horizontal direction and asymmetrical in the vertical direction. Here, "symmetrical in the horizontal direction" means that it is symmetrical with respect to an axis of symmetry that is parallel to the vertical direction and passes through the centroid 75 of the glue portion 7. Also, "asymmetrical in the vertical direction" means that it is asymmetric with respect to an axis of symmetry that is parallel to the horizontal direction and passes through the centroid 75 of the glue portion 7.

[0048] For example, if all of the adhesive portions 7 are formed in the same direction over the entire surface of the substrate 5, the vertices 71 of the adhesive portions 7 will face one of three directions. In this embodiment, each side 72 of each adhesive portion 7 is curved concavely, and the adhesive portion 7 is configured to peel off when the vertices 71 peel off regardless of the direction from which the adhesive product 4 is peeled off; however, if the interface is not straight, the adhesive portion 7 may not peel off as expected.

[0049] In contrast, in the adhesive product 4 according to this embodiment, each adhesive portion 7 in the second row 82 is formed in a shape that is vertically inverted relative to each adhesive portion 7 in the first row 81, which makes it possible to distribute the orientation of the vertices 71 of each adhesive portion 7. This makes it possible to obtain an adhesive product with higher releasability regardless of the orientation from which the interface is approached.

[0050] Furthermore, the glue portions 7 of the second row 82 are laterally offset relative to the glue portions 7 of the first row 81, and more specifically, are disposed between adjacent glue portions 7 of the first row 81. The glue portions 7 of the second row 82 overlap adjacent glue portions 7 of the first row 81 when viewed along the horizontal direction (in other words, when viewed from the side of the glue portions 7 along the arrow E1 in FIG. 3(B)). Here, as shown in FIG. 3(B), it is preferable that 30% or more of the vertical dimension of the glue portions 7 of the second row 82 overlaps with the vertical region R1 in which the first row 81 is formed, and more preferably, the centroid 75 of the glue portion 7 of the second row 82 overlaps.

[0051] In addition, in this embodiment, one glue portion 7 in the second row 82 overlaps with an adjacent glue portion 7 in the first row 81 by a dimension that is 30% to 50% of the horizontal dimension of the glue portion 7 in the second row 82 when viewed along the vertical direction.

[0052] This allows the area ratio of the adhesive portion 7 to the back surface of the substrate 5 to be increased, resulting in high adhesiveness. In particular, in this embodiment, multiple ventilation holes 33 are formed in the cover 3, and the adhesive strength of the adhesive product 4 cannot be obtained in the areas where the ventilation holes 33 and the adhesive portion 7 overlap. Therefore, by making each adhesive portion 7 in the second row 82 overlap the adhesive portion 7 in the first row 81 when viewed laterally, it is possible to increase the area ratio of the multiple adhesive portions 7 while making each adhesive portion 7 into a shape that is highly releasable. As a result, appropriate adhesiveness can be ensured even for a container 2 having multiple ventilation holes 33.

[0053] <Effects> As explained above, in the adhesive product 4 according to this embodiment, at least one side 72 of each adhesive portion 7 is curved concavely, so that when peeling the adhesive product 4, peeling of the adhesive portion 7 begins at the apex 71, regardless of the position on the outer periphery of the adhesive product 4 from which it is peeled, and therefore the substrate 5 is less likely to tear or leave adhesive residue, improving peelability. As a result, it is possible to prevent adhesive from remaining on the target object or the substrate 5 from tearing, while maintaining adhesive strength.

[0054] Furthermore, since each adhesive portion 7 is formed in a triangle having three vertices 71, each vertex 71 can be easily designed to have an acute angle, which improves releasability.

[0055] Furthermore, each side 72 of the adhesive portion 7 passes through a point on the second imaginary line segment 74 that is 10% or more of the length dimension L2 of the second imaginary line segment 74 from the midpoint M1 toward the centroid 75, thereby achieving high releasability while maintaining adhesive strength.

[0056] Furthermore, in the first row 81 and the second row 82, which are composed of multiple glue sections 7, each glue section 7 in the second row 82 is formed in a shape that is vertically inverted relative to each glue section 7 in the first row 81, so that the orientation of the vertices 71 of each glue section 7 can be dispersed, resulting in higher peelability.

[0057] In addition, each glue portion 7 in the second row 82 is also shifted horizontally relative to each glue portion 7 in the first row 81, and when viewed horizontally, each glue portion 7 in the second row 82 overlaps with the multiple glue portions 7 in the first row 81 by more than 30% of its vertical dimension.This means that the glue portions 7 can be laid out over the substrate 5, thereby increasing adhesive strength while ensuring peelability.

[0058] Furthermore, since the centroids of each glue section 7 in the second row 82 overlap with the multiple glue sections in the first row when viewed horizontally, the glue sections 7 can be spread even more evenly over the substrate 5, thereby increasing the adhesive strength.

[0059] <Modification> The above embodiment is merely one of various embodiments of the present invention. The embodiment can be modified in various ways depending on the design, etc., as long as the object of the present invention can be achieved. Modifications of the embodiment are listed below. The modifications described below can be applied in appropriate combinations.

[0060] (1) Variation 1 Although the glue portion 7 according to the above embodiment is formed in a triangular shape, as described above, the present invention may be any polygonal shape, such as a pentagon with each side 72 curved concavely, as shown in FIG. 6. Because the pentagonal shape is a polygon that is horizontally symmetrical and vertically asymmetrical, similar to the above embodiment, each glue portion 7 in the second row 82 can be formed in a shape that is vertically inverted relative to each glue portion 7 in the first row 81. Furthermore, when viewed horizontally, 30% or more of the vertical dimension of each glue portion 7 in the second row 82 overlaps with the vertical region R1 in which the first row 81 is formed.

[0061] Therefore, in this modification, the adhesive portions 7 can be spread over the substrate 5, and adhesive strength can be increased while ensuring releasability. In this modification, the centroids of the adhesive portions 7 in the second row 82 are offset from the region R1 of the first row 81 when viewed laterally, but may overlap with the region R1. For example, this can be achieved by increasing the pitch of the adhesive portions 7 in the first row 81 and the pitch of the adhesive portions 7 in the second row 82, and then moving the first row 81 and the second row 82 closer to each other.

[0062] In addition, when compared to the triangular adhesive portion 7 in terms of size that fits within the same rectangular frame, the pentagonal adhesive portion 7 has a larger area and therefore a higher adhesive strength, but the width of the corner having the vertex 71 is wider, so it has slightly inferior peelability.

[0063] (2) Other variations The adhesive product 4 according to the above embodiment is attached to a container 2, but the object to which the adhesive product 4 according to the present invention is attached does not have to be a container 2, and may be attached to, for example, an electrical appliance, furniture, food, books, miscellaneous goods, etc. Furthermore, the adhesive product 4 may be attached to a packaging material that covers the container 2, electrical appliance, furniture, food, books, miscellaneous goods, etc. The packaging material is, for example, a transparent film.

[0064] Furthermore, although the container 2 according to the above embodiment is provided with the cover 3, the cover 3 may be omitted in the present invention.

[0065] In the above embodiment, the first direction in which the glue portions 7 arranged in the same direction are aligned is exemplified as the "horizontal direction," and the second direction is exemplified as the "vertical direction." However, as shown in FIG. 7, the first direction may be defined as the "vertical direction" and the second direction as the "horizontal direction." The glue portions 7 arranged in the same direction in the first row 81 are aligned in the vertical direction, and the glue portions 7 in the second row 82 are offset in the horizontal direction. In this case, the glue portions 7 in the first row 81 and the second row 82 are formed in a polygonal shape that is symmetrical in the vertical direction (first direction) and asymmetrical in the horizontal direction (second direction). Each glue portion 7 in the second row 82 is formed in a shape that is inverted in the horizontal direction (second direction) relative to each glue portion 7 in the first row 81.

[0066] In the adhesive portion 7 of the above embodiment, all sides 72 are concavely curved, but in the present invention, it is sufficient that at least one of all sides 72 included in the polygon is concavely curved, and it is not necessary that all sides 72 are concavely curved.

[0067] In this specification, expressions accompanied by "approximately", such as "approximately parallel" or "approximately perpendicular", may be used. For example, "approximately parallel" means that the state is substantially "parallel", and includes not only a strictly "parallel" state but also an error of a few degrees. The same applies to other expressions accompanied by "approximately".

[0068] Furthermore, in this specification, expressions such as "end" and "edge" are used that are distinguished by the presence or absence of "... part." For example, "edge" means the end of an object, while "edge" means a region having a certain range that includes the "edge." Any point within a certain range that includes the edge is considered to be an "end." The same applies to other expressions that include "... part."

[0069] <Example> The present invention will be described in more detail below with reference to examples, but the pressure-sensitive adhesive product according to the present invention is not limited to the following examples.

[0070] (1) Example 1 In Example 1, the substrate and adhesive portion were made of the following materials. Substrate 5: Art paper, thickness 100 μm Adhesive part 7: Uses an acrylic adhesive. The adhesive part is triangular in shape with each side curved concavely.

[0071] The test piece used in Example 1 had one adhesive portion formed on one surface of the substrate.

[0072] (2) Comparative Example 1 For the adhesive product according to Comparative Example 1, the same materials as those of the substrate and adhesive portion were used as in Example 1. The adhesive portion was square in shape, with each side formed in a straight line. For the test piece of Comparative Example 1, a test piece was used in which one adhesive portion was formed on one side of the substrate, similar to the test piece of Example 1.

[0073] (3) Comparative Example 2 For the adhesive product according to Comparative Example 2, the same materials as those of the substrate and adhesive portion were used as in Example 1. The shape of the adhesive portion was a pentagon with a star shape in which each side was bent in the middle. As for the test piece for Comparative Example 2, a test piece in which one adhesive portion was formed on one side of the substrate was used, similar to the test piece for Example 1.

[0074] (4) Comparative Example 3 For the adhesive product according to Comparative Example 3, the same materials as those of the substrate and adhesive portion were used as in Example 1. The adhesive portion had a circular shape. As for the test piece for Comparative Example 3, a test piece in which one adhesive portion was formed on one side of the substrate was used, similar to the test piece for Example 1.

[0075] (5) Test method For each test piece of Example 1 and Comparative Examples 1 to 3, the substrate was peeled away so that the interfaces approached each other in the direction of the arrows shown in Figure 8. The experiment was carried out three or more times for each test piece, and the number of times the substrate broke and remained or adhesive remained was recorded, and the occurrence rate of material breakage or adhesive residue was calculated. The results are shown in Figure 8.

[0076] (6) Results In the test pieces according to Example 1, 0% of the test pieces had broken substrates, whereas in Comparative Example 1, some of the test pieces had broken substrates depending on the direction in which the interface approached, and in Comparative Examples 2 and 3, some of the test pieces had broken substrates. This shows that if the shape of the adhesive part is polygonal with each side curved concavely, the substrate is less likely to break and the adhesive is less likely to remain. [Explanation of symbols]

[0077] 1. Container with adhesive product 2 containers 4. Adhesive products 5 Base material 6 Glue fixing part 7 Glue part 71 Vertex 72 sides 73 First imaginary line segment 74 Second imaginary line segment 75 centroid 81 First Column 82 Second Column

Claims

1. A substrate; A plurality of adhesive portions provided on one surface of the base material and arranged at intervals; Equipped with In the adhesive product, each of the adhesive parts is a polygon formed by three or more vertices and a plurality of sides connecting the adjacent vertices, and at least one of the sides is curved concavely in the direction in which the adhesive part is concave.

2. At least two adjacent sides are curved concavely in a direction in which the adhesive portion is concave. The adhesive product according to claim 1.

3. Each of the sides is curved concavely in a direction in which the adhesive portion is concave. The adhesive product according to claim 1 or claim 2.

4. Each of the adhesive portions is formed in a triangular shape having three vertices. The adhesive product according to any one of claims 1 to 3.

5. The edge that is curved concavely in the direction in which the adhesive portion is concave passes through a point on a second virtual line segment that connects the midpoint of a first virtual line segment connecting the adjacent vertices and the centroid of the adhesive portion, the point being 10% or more of the length dimension of the second virtual line segment from the midpoint toward the centroid. The adhesive product according to any one of claims 1 to 4.

6. The plurality of glue portions are a first row in which a plurality of the adhesive portions are arranged in a first direction; A second row in which a plurality of the adhesive portions are arranged in the first direction and are shifted from the first row in a second direction perpendicular to the first direction; and Each of the adhesive portions in the first row and the second row is formed in a shape that is symmetrical in the first direction and asymmetrical in the second direction, Each of the adhesive portions in the second row is formed in a shape that is inverted in the second direction relative to each of the adhesive portions in the first row. The adhesive product according to any one of claims 1 to 5.

7. Each of the adhesive portions in the second row is also offset in the first direction relative to each of the adhesive portions in the first row, The plurality of adhesive portions in the first row overlap with each other in the second direction by 30% or more of the dimension of each adhesive portion in the second row, as viewed along the first direction. The adhesive product according to claim 6.

8. The centroid of each of the adhesive portions in the second row overlaps with the adhesive portion in the first row when viewed along the first direction. The adhesive product according to claim 7.

9. The adhesive product according to any one of claims 1 to 8, a container to which the adhesive product is attached; Equipped with Container with adhesive product.

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