Label media

Abstract

This label medium provides a label that can suppress label peeling by promoting adhesion of the label's edges to the substrate. [Solution] The label 20 has a first end 22, a second end 23, and an intermediate portion 24. The first end 22 is one end in the first direction. The second end 23 is the other end in the first direction. The intermediate portion 24 is the portion between the first end 22 and the second end 23 in the first direction. The adhesive layer 26 for attaching the label 20 to the substrate 100 is on the first surface of the first end 22 and the second end 23, but not on the intermediate portion 24. Therefore, when the worker attaches the label 20 to the substrate 100, they are made aware of pressing the first end 22 and the second end 23 against the substrate 100. When the worker presses the first end 22 and the second end 23 from the second surface 20B with their fingers, the label 20 adheres tightly to the substrate 100 and peeling is suppressed.

Description

[Technical Field]

[0001] This invention relates to a label medium in which a label is affixed to a backing sheet. [Background technology]

[0002] The label described in Patent Document 1 has perforated slits on the edge of the base material. There are multiple rows of slits, extending along the edge of the base material. When the label is applied along the axial direction of a cylindrical body, the edge curves to follow the surface of the cylindrical body due to each slit. Therefore, the edge does not lift up from the surface. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-182130 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] However, if the worker did not press the edges of the label firmly against the surface during application, the edges may lift, potentially causing the label to peel off.

[0005] The object of the present invention is to provide a label medium that can suppress label peeling by promoting adhesion of the label's edges to the substrate. [Means for solving the problem]

[0006] According to one aspect of the present invention, a label medium having the following features is provided. The label medium includes a label having an adhesive layer for attaching to a substrate, and a backing paper to which the label is attached via the adhesive layer. The label has a first surface, a first end, a second end, and an intermediate portion. The first surface extends in a first direction and a second direction intersecting the first direction when not attached to the substrate. The first end is one end in the first direction. The second end is the other end in the first direction. The intermediate portion is the portion between the first end and the second end. The adhesive layer is present on the first surface at least at the first end and the second end. The label has adhesive properties at the first end and the second end, but the intermediate portion does not.

[0007] According to this embodiment, when attaching a label to an object having a curved surface, the worker first attaches the second end of the adhesive label to the object. The worker then curves the label to conform to the object. The middle part of the label does not have adhesive properties. Therefore, the worker attaches the first end, which has adhesive properties, to the object, and further presses the first end against the object to prevent the label from peeling off. By pressing the first end, the adhesive layer adheres tightly to the object.

[0008] Furthermore, the worker ensures that the label adheres securely to the substrate by pressing the adhesive second end against the substrate. By having adhesive properties at the first and second ends, but not in the middle section, the worker is encouraged to consciously press the first and second ends against the substrate. Therefore, the worker is encouraged to apply the label while pressing the first and second ends against the substrate. This results in a label medium where the adhesive layer is less likely to lift and the label is less likely to peel off, with the label attached to the backing paper.

[0009] In this embodiment, when the label is not attached to the adherend, the direction intersecting the first and second directions is defined as the third direction, and the following is defined: The adhesive force of the adhesive layer is W labelLet it be [N / mm]. Let the length of the label in the first direction be L [mm]. Let the length of the first end portion in the first direction be L1 [mm]. Let the length of the second end portion in the first direction be L2 [mm]. Let the length of the label in the second direction be B [mm]. Let the length of the label in the third direction be H [mm]. Let the length of the separation between the surface of the adherend and one end of the intermediate portion in the first direction in the third direction be X [mm] in a state where the second end portion is attached to the adherend and the first end portion is not attached to the adherend. Let the Young's modulus of the label be E [N / mm 2 . In this case, the label [Number] may satisfy

[0010] There may be a case where a label is attached to an adherend in which the surface height positions of the portion where the first end portion is attached and the portion where the second end portion is attached are different. The state where a label is attached to such an adherend is a state where the second end portion is attached to the adherend and the first end portion is attached to the adherend after bending the intermediate portion of the label. In the adhesive layers of the first end portion and the second end portion, stress with respect to the load required to bend the intermediate portion is applied in order to eliminate the bending of the intermediate portion. By the label having an adhesive force that satisfies the formula (1), an adhesive force greater than or equal to the load required to bend the intermediate portion by X mm is ensured in the adhesive layer of the first end portion. Therefore, a label medium in which a label that is unlikely to float and is unlikely to peel off is attached to a backing sheet is provided.

[0011] In this aspect, the label may have a starting portion that serves as a starting point when the label bends in the third direction. The starting portion is a slit that extends in the second direction while penetrating the label in the third direction, and portions where the label is connected in the first direction are arranged at both ends. Or, the starting portion is a slit row in which a plurality of slits are arranged in the second direction. Alternatively, the starting portion is a fold that is recessed in the third direction and extends in the second direction on the surface of the label. In this aspect, further, the following are defined. Let the tensile strength of the label be σmax [N / mm 2 . Let the total length in the second direction of the starting cross-section, which is the cross-section at the starting portion among the cross-sections orthogonal to the first direction of the label, be B1 [mm]. Let the total length in the third direction of the starting cross-section be H1 [mm]. Let the length in the first direction between the first end, which is one end in the first direction at the first end portion, and the starting portion be L3 [mm]. In this case, the label may satisfy

Equation

[0012] When the first end portion is attached to the adherend, a bending stress corresponding to the load required to bend the portion of the intermediate portion between the starting portion and the second end portion is applied to the starting portion. When (2) is satisfied, since the tensile strength of the label is smaller than the bending stress applied to the starting portion, the label breaks at the starting portion. When the label breaks, the direction of the stress applied to the adhesive layer at the first end portion changes to a direction along the surface of the adherend. Then, since the stress required to peel off the first end portion from the adherend increases, the first end portion becomes difficult to peel off. Therefore, a label medium in which a label with an adhesive layer that is unlikely to have a lift and is difficult to peel off is attached to the backing paper is provided.

[0013] In this aspect, further, when the second end portion is attached to the adherend and the first end portion is not attached to the adherend, the length by which the surface of the adherend and the starting portion are separated in the third direction is defined as X1 [mm]. In this case, the label may satisfy

Equation

[0014] By the adhesive layer of the label satisfying (3), an adhesive force equal to or greater than the load required to bend the intermediate portion broken at the starting portion by X1 mm is ensured in the adhesive layer at the first end portion. Therefore, a label medium in which a label with an adhesive layer that is unlikely to have a lift and is difficult to peel off is attached to the backing paper is provided.

[0015] In this embodiment, the second end is further attached to the adherend, the middle portion is in contact with the adherend, and the first end is not attached to the adherend. In this state, the distance between the surface of the adherend and the first end in the third direction is defined as X2 [mm]. In this case, the label is,

number

[0016] By satisfying equation (4), the adhesive layer of the label ensures that the adhesive force at the first end is greater than the load required to bend the first end by X2 mm. Thus, a label medium is provided in which the adhesive layer is less prone to lifting and peeling, and the label is attached to the backing paper.

[0017] In this embodiment, the label may have a third end and a fourth end. The third end is one end in the second direction. The fourth end is the other end in the second direction. Furthermore, the portion of the intermediate part between the third end and the fourth end is defined as a specific intermediate part. In this case, the adhesive layer may be present on the first surface at least at the first end, second end, third end and fourth end. The label may have adhesive properties at the first end, second end, third end and fourth end. The label may not have adhesive properties at the specific intermediate part.

[0018] The worker may apply the label to the surface of the substrate with the first direction of the label aligned with it, or with the second direction aligned with it. In other words, the worker can apply the label to the substrate without having to consciously think about applying it in a direction that would make it difficult to peel off.

[0019] In this embodiment, the adhesive layer may include a specific region and a non-specific region. The specific region is a part of the first surface in the middle portion of the label. The non-specific region is the area of ​​the first surface in the middle portion excluding the specific region. The adhesive layer may be present in at least the specific region. The label may have an adhesive function in the specific region, but may not have an adhesive function in the non-specific region.

[0020] The worker attaches the adhesive layer in a specific area to the substrate, correcting its orientation, and then attaches the first and second ends to the substrate.

[0021] In this embodiment, the label may have an indicator indicating the pressing position when it is attached to the object. The indicator may be on a second surface of the label opposite to the first surface at the first and second ends. Alternatively, the indicator may be on a second surface of the label opposite to the first surface at the first, second, third, and fourth ends.

[0022] When the indicators are located at the first and second ends, the adhesive layers at the first and second ends adhere to the substrate when the worker presses down on the indicators. When the indicators are located at the first, second, third, and fourth ends, the adhesive layers at the first, second, third, and fourth ends adhere to the substrate when the worker presses down on the indicators. Thus, a label medium is provided in which the adhesive layer is less likely to lift and peel off, and the label is attached to the backing paper. [Brief explanation of the drawing]

[0023] [Figure 1] This is a perspective view of label sheet 1 and label printer 2. [Figure 2] This is a perspective view of label 20. [Figure 3] This diagram shows how label 20 is attached to the object 100. [Figure 4] This figure shows the label 20 adhering to the adherend 100 at its second end 23, resulting in a cantilevered state. [Figure 5] This is a perspective view of a label 20 having a starting point 25. [Figure 6] Figure 5 shows a cross-sectional view of the label 20 at the starting point 25, as seen in the direction of the arrow along line II. [Figure 7] This diagram shows how a label 20 attached to an object 100 bends at its starting point 25. [Figure 8] This figure shows a label 20 having a starting point 25, which is attached to the object 100 at its second end 23, resulting in a cantilevered state. [Figure 9] This is a perspective view of label 120 of the first modified example. [Figure 10] This is a perspective view of label 220 of the second modified example. [Figure 11] This is a perspective view of label 320 of the third modified example. [Modes for carrying out the invention]

[0024] One embodiment of the present invention is described below. The referenced drawings are used to illustrate the technical features that the present invention may adopt. That is, the configurations shown in the drawings are not intended to be the sole limiting factors, but are merely illustrative examples. In each drawing, for the sake of clarity, the proportions of the sizes of each component are shown in proportions different from those of the actual components.

[0025] The label sheet 1 shown in Figure 1 is an example of a label medium according to the present invention. The label sheet 1 is a strip-shaped sheet extending in the longitudinal and transverse directions. The longitudinal direction is the direction in which the label sheet 1 extends in a long strip shape. The transverse direction is the width direction of the strip-shaped label sheet 1 and intersects with the longitudinal direction. The label sheet 1 is provided, for example, in the form of a roll wound on a spool 1A.

[0026] The label sheet 1 comprises a backing sheet 10 and a label 20. The backing sheet 10 is a so-called release paper, in which a release agent, such as a silicone-based one, is applied to the adhesive surface 11 of a strip-shaped substrate extending in a first direction. The adhesive surface 11 of the backing sheet 10 is the surface that faces the label 20 when the label 20 has not been peeled off the backing sheet 10. The substrate can be, for example, glassine paper, fine paper, or kraft paper. A resin film or the like may also be used as the substrate.

[0027] The label 20 is a rectangular plate-shaped sheet made of a self-coloring, heat-sensitive sheet that has been pre-cut into multiple pieces by pre-cut notches 29 at predetermined intervals. The label 20 has a first surface 20A and a second surface 20B that extend in a first and second direction. The first direction is the short side of the label sheet 1. The second direction is the long side of the label sheet 1 and intersects the first direction. The first surface 20A of the label 20 is the side that faces the backing paper 10 when the label 20 has not been peeled off the backing paper 10, and the second surface 20B is the side opposite to the first surface 20A.

[0028] The label 20 has a printed layer 21 and an adhesive layer 26 laminated in a third direction. The third direction is the thickness direction of the label 20 and intersects the first and second directions. The printed layer 21 is, for example, thermal paper containing a coloring agent that develops color when heated. The adhesive layer 26 is a layer in which adhesive is placed on the first surface 20A of the label 20 in the printed layer 21. The label 20 is peelably attached to the adhesive surface 11 of the backing paper 10 with the adhesive layer 26.

[0029] The label 20 has an adhesive function by having an adhesive layer 26. The adhesive function is the ability to stick to the object to which it is attached. The label 20 is attached to the object to which it is attached, such as the adherend 100, via the adhesive layer 26 which has the adhesive function. In this embodiment, the label 20 has an adhesive function on a part of the first surface 20A, and does not have an adhesive function on the other part of the first surface 20A. The state in which the label 20 does not have an adhesive function means that the label 20 cannot stick to the object to which it is attached.

[0030] If the adhesive layer 26 is absent, the label 20 cannot adhere to the object to which it is applied and therefore does not have an adhesive function. Also, even if the adhesive layer 26 is present, if the adhesion of the adhesive layer 26 to the object to which it is applied is inhibited, the label 20 will not have an adhesive function. An example of a state in which adhesion is inhibited is when the adhesive layer 26 has been processed to eliminate its adhesiveness, for example, by applying varnish or attaching a film to it. Furthermore, when peeling the label 20 from the backing paper 10, if a part of the backing paper 10 is not peeled off and remains attached to the adhesive layer 26, the remaining part of the backing paper 10 can be made to have no adhesive function. In this embodiment, the label 20 has an adhesive layer 26 in the part that has an adhesive function and does not have an adhesive layer 26 in the part that does not have an adhesive function.

[0031] The label sheet 1 is wound onto the spool 1A with the label 20 positioned on the inner circumference of the backing paper 10. The label sheet 1, still in roll form, is stored in the storage compartment 3 of the label printer 2. The label printer 2 is a device that prints various characters (letters, numbers, symbols, and shapes, etc.) onto the label sheet 1. The label sheet 1 is pulled out longitudinally from the storage compartment 3 and transported inside the label printer 2.

[0032] The thermal head of the label printer 2 heats the second surface 20B of the printing layer 21 to print the image. After printing, the label sheet 1 is transported to the output port and discharged outside the label printer 2. The operator peels the label 20 from the backing paper 10 and attaches it to the substrate 100.

[0033] The label 20 may be attached to an adherend 100 whose surface is curved outward, such as a spits tube. In this case, the label 20 is maintained in a bent state along the surface of the adherend 100 by the adhesive force of the adhesive layer 26. A reaction force acts on the label 20 due to internal stress, attempting to return it to its original shape. If the adhesive layer 26 and the surface of the adherend 100 are not in close contact and the adhesion is insufficient, lifting may occur between the edge of the label 20 and the adherend 100, and the label 20 may peel off.

[0034] Therefore, the label 20 of this embodiment is configured as follows. As shown in Figure 2, the label 20 has a first end 22, a second end 23, and an intermediate portion 24. The first end 22 is one end of the label 20 in the first direction. The second end 23 is the other end of the label 20 in the first direction. The intermediate portion 24 is the portion between the first end 22 and the second end 23 in the first direction.

[0035] On the first side 20A of the label 20, the adhesive layer 26 is present at the first end 22 and the second end 23, but not at the middle section 24. That is, the first end 22 and the second end 23 have adhesive properties, while the middle section 24 does not. As shown in Figure 3, when attaching the label 20 to the object 100, the worker positions the first direction of the label 20 along the circumferential direction of the object 100. The worker attaches the adhesive layer 26 of the second end 23 to the surface of the object 100. The worker then attaches the adhesive layer 26 of the first end 22 to the surface of the object 100.

[0036] Because the intermediate section 24 does not have an adhesive function, the worker is made aware of pressing the adhesive first end 22 and second end 23 against the substrate 100. Therefore, the worker is encouraged to apply the label 20 while pressing the first end 22 and second end 23 against the substrate 100. By pressing the first end 22 and second end 23 from the second surface 20B with their fingers, the worker makes the adhesive layer 26 of the first end 22 and second end 23 adhere to the surface of the substrate 100. The label 20 is less likely to lift between the first end 22 and second end 23 and the surface of the substrate 100, and peeling of the label 20 is suppressed. In addition, the worker can adjust the orientation of the label 20 by pressing the intermediate section 24, which does not have an adhesive function, against the surface of the substrate 100 with their fingers from the second surface 20B.

[0037] As shown in Figures 2 and 4, in this embodiment, the adhesive strength of the adhesive layer 26 is defined by equation (1), further suppressing the peeling of the label 20 attached to the surface of the adherend 100. The algebra related to equation (1) is defined below. The adhesive strength of the adhesive layer 26 is W label Let it be [N / mm].

[0038] The adhesive strength W of the adhesive layer 26. label The peel-off adhesive strength shall be measured based on the test method for peel-off adhesive strength specified in JIS Z0237. Specifically, the label to be tested is attached to a test plate, and the edges of the label are grasped and peeled off. The peel load is measured with a load cell. When the label 20 peels off due to internal stress, the angle θ at which the adhesive layer 26 is peeled off varies depending on the shape of the surface of the adherend 100. The angle θ is the angle corresponding to the height difference between the surface of the part to which the first end 22 adheres and the surface of the part to which the second end 23 adheres, and is less than 90 degrees.

[0039] For example, in Figure 4, one end of the first end 22 in the first direction is defined as the first end 221. The other end of the intermediate portion 24 in the first direction, which is one end of the second end 23 in the first direction, is defined as the fourth end 242. When the first end 22 peels off from the adherend 100, the direction connecting the first end 221 and the fourth end 242 is defined as direction D1. The direction parallel to the surface of the adherend 100 at the point where the intermediate portion 24 peels off from the adherend 100 is defined as direction D2. The angle θ is the angle that direction D2 makes with direction D1.

[0040] The peel-off adhesive strength test method specified in JIS Z0237 is a test method in which the label is peeled off at a 90-degree or 180-degree angle. Therefore, in this embodiment, the peel load of the adhesive layer 26 is measured using a load cell that can peel off the label at any angle, for example. Alternatively, the peel load of the adhesive layer 26 is estimated from the measurement results of a load cell that can peel off the label at a specific angle, such as 45 degrees, 90 degrees, or 180 degrees.

[0041] Therefore, based on the measurement results of the load cell, or the estimated results based on the measurement results, the average value of the peel load of the adhesive layer 26 at angle θ is determined. The average value of the peel load is divided by the label width and multiplied by 10. As the adhesive force of the adhesive layer [N / mm], the load required to peel off 1 mm of a label with a label width of 10 mm is determined.

[0042] Let the length of the label 20 in the first direction be L [mm]. Let the length of the first end portion 22 in the first direction be L1 [mm]. Let the length of the second end portion 23 in the first direction be L2 [mm]. Let the length of the label 20 in the second direction be B [mm]. Let the length of the label 20 in the third direction be H [mm].

[0043] Also, assume that the second end portion 23 is attached to the adherend 100 and the first end portion 22 is not attached to the adherend 100. In this state, let the length by which the surface of the adherend 100 and the third end 241, which is one end of the intermediate portion 24 in the first direction, are separated in the third direction be X [mm]. Let the Young's modulus of the label 20 be E [N / mm 2 .

[0044] In this case, the label 20

Equation

[0045] Hereinafter, the formula (1) will be described. The adhesive layers 26 of the first end portion 22 and the second end portion 23 maintain the state in which the intermediate portion 24 without the adhesive layer is bent along the surface of the adherend 100 by the adhesive force W label . As shown in FIG. 4, in the state where the second end portion 23 is attached to the adherend 100 and the first end portion 22 is not attached, the label 20 can be regarded as a cantilever beam. A cantilever means a state where one end is fixed and the other end is not fixed. When a load P0 [N] is applied to the tip of the cantilever beam and the tip is deflected by δ0 [mm], the deflection δ0 is given by the known formula (5).

[0046]

Equation

[0047] When the transverse length of the cross-section of a cantilever beam is b [mm] and the vertical length is h [mm], the second moment of area I0 is given by the known equation (6).

number

[0048] Substituting equation (6) into equation (5) and rearranging for load P0, we obtain equation (7).

number

[0049] Here, we replace the cantilever beam with label 20. The length of the intermediate section 24 in the first direction is L-L1-L2, which corresponds to the length L0 of the cantilever beam. When the intermediate section 24 is bent until the third end 241 of the intermediate section 24 contacts the adherend 100, the length X by which the third end 241 moves in the third direction corresponds to the deflection δ0 of the cantilever beam. Label 20 in this state is shown by a dotted line in Figure 4. The Young's modulus E of label 20 corresponds to the Young's modulus E0 of the cantilever beam.

[0050] The length B in the second direction and the length H in the third direction of the label 20 correspond to the horizontal length b and vertical length h of the cross-section of the cantilever beam, respectively. If P1 [N] is the load required to maintain the state in which the intermediate part 24 of the label 20 is deflected along the surface of the adherend 100, then equation (8) is obtained.

number

[0051] The third end 241 of the intermediate section 24 is connected to the first end 22. The length of the first end 22 in the first direction is L1, and the adhesive force W of the adhesive layer 26. label This maintains the adhesive state to the adherend 100. In other words, the adhesive force W of the adhesive layer 26 of the first end 22 is maintained at the third end 241. label The value W obtained by multiplying by the length L1 of the first end 22. label L1 is applied as load P1. Therefore, W labelIf L1 is greater than or equal to the load P1, the first end portion 22 can maintain a state in which the intermediate portion 24 is bent along the surface of the adherend 100. label Let's organize the information and discuss the adhesive strength W. label When equation (1) is satisfied, the peeling of the label 20 attached to the substrate 100 is suppressed.

[0052] Next, as shown in Figure 5, the label 20 may have a starting point 25 that bends to suppress peeling when the bending of the intermediate portion 24 is about to be restored by internal stress. In this embodiment, the starting point 25 is, for example, a perforation. As shown in Figure 6, the perforation is composed of rows of slits that penetrate the label 20 in a third direction and extend in a second direction, with multiple slits arranged in the second direction.

[0053] As shown in Figure 4, when the intermediate portion 24 lifts away from the surface of the adherend 100 due to internal stress, the third end 241 lifts the first end 22 in a direction close to perpendicular to the surface of the adherend 100. As shown in Figure 7, when the label 20 bends at the starting point 25, the starting point 25 lifts up in a direction close to perpendicular to the surface of the adherend 100. On the other hand, the third end 241, being pulled by the starting point 25, attempts to lift the first end 22 away from the surface of the adherend 100 at an angle θ. The direction in which the first end 22 is lifted away from the surface of the adherend 100 at an angle θ is closer to the direction along the surface than to the direction perpendicular to the surface. Therefore, when the label 20 bends at the starting point 25, the adhesive layer 26 of the first end 22 becomes difficult to peel off from the surface of the adherend 100.

[0054] The starting point 25 is not limited to a perforation, but may be a single slit extending in the second direction. The slit penetrates the printed layer 21 of the label 20 in the third direction, i.e., the thickness direction, and extends in the second direction, i.e., the width direction. The slit does not extend to the edge of the label 20 in the second direction. At both ends of the slit are portions where the label 20 is connected in the first direction. Therefore, the label 20 is not separated in the first direction by the slit.

[0055] Furthermore, the starting point 25 may be a fold that is recessed in the third direction and extends in the second direction on the first surface 20A or the second surface 20B or both of the label 20. The fold does not penetrate the printed layer 21 of the label 20 in the third direction, i.e., the thickness direction. The fold may extend to the edge of the label 20 in the second direction, or it may not extend to the edge of the label 20. The fold may be configured as a series of short folds arranged in the second direction, like a row of slits.

[0056] In order to ensure that the starting point 25 bends reliably when lifting occurs in the middle section 24, the tensile strength σ of the label 20 max [N / mm 2 ] is defined by equation (2). The algebra relating to equation (2) is defined below.

[0057] As shown in Figure 6, the cross-section of the label 20 at the starting point 25 is called the starting cross-section 251. The sum of the lengths in the second direction of the starting cross-section 251 perpendicular to the first direction of the label 20 is B1 [mm]. If the starting point 25 is a row of four slits, the starting cross-section 251 is divided into five cross-sections. The sum of the lengths in the second direction of each of the five starting cross-sections 251 is B A ,B B ,B C ,B D ,B E In that case, B1 = B A +B B +B C +B D +B E It is given by.

[0058] Furthermore, the sum of the lengths in the third direction of the starting cross section 251 is set to H1 [mm]. As shown in Figure 8, the length in the first direction between the first end 221 on one side of the first end 22 and the starting section 25 is set to L3 [mm].

[0059] In this case, label 20 is,

number

[0060] The following explains equation (2). Section modulus Z[m] at the starting point 25 3 ] is given by the well-known equation (9).

number

[0061] Consider the case where the portion of the label 20 from the starting point 25 in the first direction to the fourth end 242, which is the other end of the intermediate portion 24 and one end of the second end 23 in the first direction, flexes along the surface of the adherend 100. In this case, the load applied to the starting point 25 is the peel load relative to the adhesive force of the portion of the label 20 from the first end 221 to the starting point 25. The adhesive layer 26, which has adhesive function, is located at the first end 22. Therefore, the load applied to the starting point 25 is the adhesive force W of the first end 22. label The value W obtained by multiplying by length L1. label L1. The starting point 25 is W label To cause the body to bend due to L1, determine the maximum bending moment M [N·mm].

[0062] Starting point 25 is W label The maximum bending moment M of the portion from the starting point 25 to the fourth end 242 when L1 is applied as a load is obtained by equation (10). M=W label ·L1(L-L2-L3) ···(10) Note that L-L2-L3 is the length in the first direction from the starting point 25 to the fourth end 242 of the intermediate section 24.

[0063] Furthermore, the maximum bending stress σ is given by the known equation (11). σ = M / Z ... (11)

[0064] Substituting equations (9) and (10) into equation (11) and rearranging, we obtain equation (12).

number

[0065] When the deflection of the portion from the starting point 25 to the fourth end 242 of the intermediate portion 24 returns to its original state due to internal stress, the starting point 25 is designed to bend. To achieve this, the tensile strength σ of the label 20 is max It is sufficient that the tensile strength σ is smaller than the maximum bending stress σ. max As equation (2) is satisfied, the label 20 is reliably bent at the starting point 25. Therefore, the label 20 attached to the adherend 100 is prevented from peeling off.

[0066] Furthermore, even if the starting point 25 bends, the portion from the first end 221 to the starting point 25 is pulled by the internal stress of the portion from the starting point 25 to the fourth end 242 of the intermediate portion 24. Therefore, in this embodiment, the adhesive force W of the adhesive layer 26 of the first end 22 label This is further defined by equation (3).

number

[0067] Equation (3), similar to equation (1), shows the cohesion W when the portion from the starting point 25 to the fourth end 242 of the intermediate portion 24 is considered as a cantilever beam. label This defines the following: The length from the starting point 25 to the fourth end 242 is L-L2-L3. The portion from the first end 221 to the starting point 25, including the first end 22, and the portion from the starting point 25 to the fourth end 242 of the intermediate portion 24 are connected at the starting point 25. The first end 22 has an adhesive strength W of the adhesive layer 26. label This maintains an adhesive state to the adherend 100.

[0068] (3) By satisfying equation (3), the first end portion 22 can maintain a state in which the portion from the starting point 25 to the fourth end 242 of the intermediate portion 24 is bent along the surface of the adherend 100. That is, the first end portion 22 is able to maintain the adhesive force W of the adhesive layer 26. label This prevents the label 20 from peeling off even if it is bent at the starting point 25.

[0069] Furthermore, of the portion from the first end 221 to the starting point 25, including the first end 22, the first end 22 remains adhered to the adherend 100 by the adhesive layer 26. In other words, a reaction force acts on the first end 22 due to internal stress, attempting to restore it to its original shape. Therefore, in this embodiment, the adhesive force W of the adhesive layer 26 of the first end 22 label This is further defined by equation (4).

number

[0070] The following explains equation (4). Assuming that the second end 23 and the intermediate part 24 are fixed, the section from the first end 221 to the third end 241 is considered a cantilever beam. The section from the first end 221 to the third end 241 is, in other words, the first end 22. In this state, the first end 22 is shown by a dashed line in Figure 8.

[0071] When a uniformly distributed load W0 [N / mm] is applied to the entire length of a cantilever beam L0, and the tip deflects by δ1 [mm], the deflection δ1 is given by the known equation (13).

number

[0072] Substituting equation (6) into equation (13) and rearranging for the uniformly distributed load W0, we obtain equation (14).

number

[0073] Here, we replace the cantilever beam with label 20. The length of the first end 22 in the first direction is L3, which corresponds to the length L0 of the cantilever beam. When the first end 22 is deflected, the length X2 by which the first end 22 moves in the third direction corresponds to the deflection δ1 of the cantilever beam. The Young's modulus E of label 20 corresponds to the Young's modulus E0 of the cantilever beam.

[0074] The length B in the second direction and the length H in the third direction of label 20 correspond to the lateral length b and the vertical length h of the cross-section of the cantilever beam, respectively. If W1 [N / mm] is the uniformly distributed load required to maintain the state in which the first end 22 is deflected along the surface of the adherend 100, then equation (15) is obtained.

number

[0075] Adhesion strength W of the adhesive layer 26 of the first end portion 22 label If the uniformly distributed load W1 is greater than or equal to the adhesive load W1, the portion from the first end 221 to the starting point 25 can maintain a flexed state along the surface of the adherend 100 due to the adhesive layer 26 of the first end 22. That is, the adhesive force W label The fact that equation (4) is satisfied suppresses the peeling of the label 20 attached to the substrate 100.

[0076] As explained above, when attaching a label 20 to an object 100 having a curved surface, the worker first attaches the second end 23 of the label 20, which has adhesive properties, to the object 100. The worker then curves the label 20 to conform to the object 100. The middle part 24 of the label 20 does not have adhesive properties. Therefore, the worker attaches the first end 22, which has adhesive properties, to the object 100, and further presses the first end 22 against the object 100 to prevent the label 20 from peeling off. By pressing the first end 22, the adhesive layer 26 adheres tightly to the object 100.

[0077] Furthermore, the worker presses the adhesive second end 23 against the object 100 to ensure that the label 20 is securely attached to the object 100. In this way, by having adhesive properties on the first end 22 and the second end 23, and not on the middle section 24, the worker is made aware of pressing the first end 22 and the second end 23 against the object 100. Therefore, the worker is encouraged to attach the label 20 while pressing the first end 22 and the second end 23 against the object 100. Thus, a label sheet 1 is provided in which the label 20 attached to the backing paper 10 is less likely to lift or peel off due to the adhesive layer 26.

[0078] There are adherends 100 with curved surfaces, where the surface height differs between the part to which the first end 22 adheres and the part to which the second end 23 adheres. When the label 20 is attached to such an adherend 100, the second end 23 is attached to the adherend, the middle part 24 of the label 20 is bent, and then the first end 22 is attached to the adherend 100. The adhesive layers 26 of the first end 22 and the second end 23 are subjected to internal stress in response to the load required to bend the middle part 24 in order to eliminate the bending of the middle part 24. Since the label 20 has an adhesive force that satisfies equation (1), an adhesive force greater than or equal to the load required to bend the middle part 24 by X mm is ensured in the adhesive layer 26 of the first end 22. Thus, a label sheet 1 is provided in which the label 20 attached to the backing paper 10 is less likely to lift or peel off.

[0079] When the first end portion 22 is attached to the adherend 100, the starting portion 25 is subjected to a bending stress equivalent to the load required to bend the portion of the intermediate portion 24 between the starting portion 25 and the second end portion. If equation (2) is satisfied, the tensile strength of the label 20 is less than the bending stress applied to the starting portion 25, so the label 20 bends at the starting portion 25. As the label 20 bends, the direction of the stress applied to the adhesive layer 26 of the first end portion 22 changes to a direction along the surface of the adherend 100. This increases the stress required to peel the first end portion 22 from the adherend 100, making it difficult to peel off the first end portion 22. Thus, a label sheet 1 is provided in which a label 20 that is less likely to lift in the adhesive layer 26 and is difficult to peel off is attached to the backing paper 10.

[0080] As the adhesive layer 26 of the label 20 satisfies equation (3), an adhesive force greater than the load required to bend the intermediate portion 24, which is folded at the starting point 25, by X1 mm is ensured in the adhesive layer 26 of the first end portion 22. Thus, a label sheet 1 is provided in which a label 20 that is less prone to lifting and peeling is attached to the backing paper 10.

[0081] As the adhesive layer 26 of the label 20 satisfies equation (4), an adhesive force greater than or equal to the load required to bend the first end 22 by X2mm is ensured in the adhesive layer 26 of the first end 22. Thus, a label sheet 1 is provided in which a label 20 that is less prone to lifting and peeling is attached to the backing paper 10.

[0082] In the above description, the adherend 100 is an example of an adherend of the present invention. The adhesive layer 26 is an example of an adhesive layer of the present invention. The label 20 is an example of a label of the present invention. The backing paper 10 is an example of a backing paper of the present invention. The label sheet 1 is an example of a label medium of the present invention.

[0083] The first surface 20A is an example of the first surface of the present invention. The first end portion 22 is an example of the first end portion of the present invention. The second end portion 23 is an example of the second end portion of the present invention. The intermediate portion 24 is an example of the intermediate portion of the present invention.

[0084] The starting point portion 25 is an example of the starting point portion of the present invention. The starting point cross-section 251 is an example of the starting point cross-section of the present invention. The first end 221 is an example of the first end of the present invention.

[0085] The present invention is not limited to the above embodiments and can be modified in various ways. In a first modified example of the present invention, as shown in Figure 9, the adhesive layer 126 may be present not only at both ends in the first direction of the first surface 120A, but also at both ends in the second direction. The label 120 has a first end 122, a second end 123, a third end 127, a fourth end 128, and a specific intermediate portion 124.

[0086] The first end 122 is one end of the label 120 in the first direction. The second end 123 is the other end of the label 120 in the first direction. The third end 127 is one end of the label 120 in the second direction. The fourth end 128 is the other end of the label 120 in the second direction. The first end 122, the second end 123, the third end 127, and the fourth end 128 have an adhesive layer 126 and have an adhesive function.

[0087] The specific intermediate portion 124 is the portion between the first end 122 and the second end 123 in the first direction, and the portion between the third end 127 and the fourth end 128 in the second direction. The portion between the first end 122 and the second end 123 corresponds to the intermediate portion 24 in this embodiment. Therefore, the specific intermediate portion 124 is the portion of the intermediate portion 24 between the third end 127 and the fourth end 128. The specific intermediate portion 124 does not have an adhesive layer and does not have an adhesive function. Or, even if the specific intermediate portion 124 has an adhesive layer, it does not have an adhesive function.

[0088] The worker may apply the label 120 with its first direction aligned with the curvature of the surface of the adherend 100, or with its second direction aligned. In other words, the worker can apply the label 120 to the adherend 100 without consciously thinking about applying the label 120 in a direction that would make it difficult to peel off. Since the specific intermediate portion 124 does not have an adhesive function, the worker is made to consciously press the first end 122, second end 123, third end 127, and fourth end 128 against the adherend 100. Therefore, the label 120 is less likely to have lifting in the adhesive layer 126 and is less likely to peel off.

[0089] In the first modified example, the third end 127 is an example of the third end of the present invention. The fourth end 128 is an example of the fourth end of the present invention. The specific intermediate portion 124 is an example of the specific intermediate portion of the present invention. Furthermore, the label 120 of the first modified example may have the starting portion 25 of this embodiment and a second starting portion extending in the first direction. The second starting portion may be located, for example, in the second direction, closer to the third end 127 than the center of the specific intermediate portion 124, or closer to the fourth end 128, or both.

[0090] In a second modification of the present invention, as shown in Figure 10, the label 220 may have an adhesive layer 226A in part of the intermediate portion 224. The label 220 has a specific region 224A and a non-specific region 224B in the intermediate portion 224 between the first end 222 and the second end 223. The first end 222 is one end of the label 220 in the first direction. The second end 223 is the other end of the label 220 in the first direction. The intermediate portion 224 is the portion between the first end 222 and the second end 223 in the first direction.

[0091] The specific region 224A is a portion of the first surface 220A of the intermediate portion 224. The non-specific region 224B is the portion of the first surface 220A of the intermediate portion 224 excluding the specific region 224A. In this modified example, the specific region 224A is located approximately in the center of the intermediate portion 224. Also, on the first surface 220A of the label 220, the adhesive layer 226 is located at the first end 222 and the second end 223.

[0092] A specific region 224A of the intermediate portion 224 has an adhesive layer 226A and possesses adhesive functionality. A non-specific region 224B of the intermediate portion 224 does not have an adhesive layer and therefore does not possess adhesive functionality. Or, even if an adhesive layer is present in the non-specific region 224B, it does not possess adhesive functionality.

[0093] When attaching the label 220 to the substrate 100, the worker attaches the adhesive layer 226A of a specific area 224A to the substrate 100. The adhesive layer 226A is located in part of the middle section 224. Therefore, the worker can temporarily adhere the label 220 to the substrate 100. Thus, the worker can attach the first end 222 and the second end 223 to the substrate 100 while correcting the orientation of the label 220 relative to the substrate 100.

[0094] In the second modified example, the specific region 224A is an example of a specific region of the present invention. The non-specific region 224B is an example of a non-specific region of the present invention. In the second modified example, it is preferable that the specific region 224A, where the adhesive layer 226A is located, is smaller than the adhesive layer 226 at the first end 222 and the second end 223. Alternatively, it is preferable that the adhesive strength of the adhesive layer 226A is weaker than the adhesive strength of the adhesive layer 226.

[0095] Furthermore, the specific intermediate portion 124 of the first modified example may have a specific region and a non-specific region of the second modified example. In this case, the specific region of the specific intermediate portion 124 may have an adhesive layer having adhesive function. Also, the non-specific region of the specific intermediate portion 124 may have an adhesive layer without adhesive function, or it may not have an adhesive layer at all.

[0096] In a third modified example of the present invention, as shown in Figure 11, the label 320 may have an indicator 330 on the second surface 320B at the first end 322 and the second end 323. The indicator 330 is an indicator that shows the pressing position when attaching the label 320 to the adherend 100.

[0097] When the worker applies the label 320, pressing down on the indicator 330 causes the adhesive layer 326 of the first end 322 and the second end 323 to adhere tightly to the object 100. As a result, the label 320 is less likely to lift in the adhesive layer 326 and is less likely to peel off. In the third modified example, the indicator 330 is an example of an indicator of the present invention. The indicator 330 may be a figure or a symbol, or a string of characters that prompts the worker to press down. Alternatively, multiple indicators 330 may be arranged in a second direction on the second surface 320B of the first end 322 and the second end 323 to encourage the worker to press down over a wide area.

[0098] Furthermore, the label 120 of the first modified example may have the index 330 of the third modified example on the second surface of the first end 122, second end 123, third end 127, and fourth end 128. When the worker presses down on the index 330, the first end 122, second end 123, third end 127, and fourth end 128 adhere tightly to the adherend 100. As a result, the label 120 is less likely to lift in the adhesive layer 126 and is less likely to peel off.

[0099] Other variations are described below. The adhesive layer 26 is present on the entire surface of the first surface 20A at the first end 22 and second end 23 of the label 20, but may be present only partially at each end. The starting point 25 is not limited to the intermediate part 24, but may be at the first end 22, at the second end 23, or at both. The starting point 25 may also be located closer to the second end 23 than approximately the center in the first direction of the intermediate part 24. Alternatively, the starting point 25 may be located both closer to the first end 22 and closer to the second end 23 than approximately the center in the first direction of the intermediate part 24.

[0100] The printing layer 21 of the label 20 is not limited to thermal paper; it may also be a paper material or film on which characters, etc., are printed using an ink ribbon. Alternatively, the label 20 may be printed on a transparent film, with double-sided tape attached to the printed surface so that the printed surface is protected by the film.

[0101] The label sheet 1 may be wound with the backing paper 10 positioned on the inner circumference of the label 20. In this case, the label 20 will have a tendency to bend, with the second side 20B facing outward and the first side 20A curving inward. When this label 20 is attached to the adherend 100, the label 20 will be more likely to maintain a shape that conforms to the surface of the adherend 100 due to its tendency to bend. In other words, the label 20 will be more likely to maintain a bent state without being subjected to external stress. Therefore, the label sheet 1 that can provide such a label 20 will further suppress the peeling of the label 20 from the adherend 100.

[0102] The label sheet 1 is provided with multiple labels 20 already attached to the backing paper 10, after the sheet has been pre-cut by the notches 29. However, the labels 20 may be created by cutting the label sheet 1 to the appropriate length for the printed content each time printing is required. Alternatively, the label sheet 1 is not limited to a roll, but may be a single sheet.

[0103] A spits tube was given as an example of the adherend 100, but it is not limited to this. The configuration of the label 20 is effective when the adhesive surface is not flat and the adhesive position of the first end 22 and the adhesive position of the second end 23 are different in the third direction. [Explanation of Symbols]

[0104] 1 Label sheet 10 mounting boards 20, 120, 220, 320 labels 20A, Page 1 20B,320B 2nd side 22,122,222,322 First end 23,123,223,323 Second end 24,124,224,324 Middle section 25 Starting point 26,126,226,226A,326 Adhesive layer 100 Adherent 124 Specific Intermediate Section 127 Third end 128 4th end 221 1st end 224A Specific area 224B Non-specific area 241 edge 251 Origin cross section 330 indicators

Claims

1. A label medium comprising a label having an adhesive layer for attaching to a substrate, and a backing sheet to which the label is attached via the adhesive layer, The aforementioned label is, The first surface, when not attached to the adherend, extends in a first direction and in a second direction intersecting the first direction, The first end, which is one end in the first direction, The second end, which is the other end in the first direction, The intermediate portion is the part between the first end and the second end. It has, The adhesive layer is At least on the first surface at the first end and the second end, The aforementioned label is, The first end and the second end have adhesive properties, while the intermediate portion does not. A label medium characterized by the following.

2. When the label is not attached to the object to be adhered, and the direction intersecting the first and second directions is defined as the third direction, The adhesive force of the adhesive layer is W ｌａｂｅｌ [N / mm] Let L [mm] be the length of the label in the first direction. The length of the first end in the first direction is L. １ [mm] The length of the second end in the first direction is L. ２ [mm] Let the length of the label in the second direction be B [mm]. Let H [mm] be the length of the label in the third direction. With the second end attached to the adherend and the first end not attached to the adherend, the distance between the surface of the adherend and one end of the intermediate portion in the first direction in the third direction is X [mm]. The Young's modulus of the aforementioned label is E [N / mm] ２ ] In that case, The aforementioned label is, [Math 1] Satisfying the conditions A label medium according to claim 1, characterized by the following:

3. The aforementioned label is, The label has a starting point portion which serves as the starting point when it bends in the third direction, The aforementioned starting portion is, A slit extending in the second direction while penetrating the label in the third direction, with portions of the label connected in the first direction located at both ends. Or a row of slits arranged in the second direction, Alternatively, a fold on the surface of the label that is recessed in the third direction and extends in the second direction. And, The tensile strength of the aforementioned label is σ ｍａｘ [N / mm ２ ], Of the cross-sections of the label perpendicular to the first direction, the sum of the lengths in the second direction of the starting cross-section, which is the cross-section at the starting point, is B. １ [mm] The sum of the lengths in the third direction of the starting cross section is H １ [mm] The length in the first direction between the first end, which is one end in the first direction at the first end portion, and the starting point portion is L ３ [mm] In that case, The aforementioned label is, [Math 2] Satisfying the conditions The label medium according to claim 2, characterized by the following:

4. With the second end attached to the adherend and the first end not attached to the adherend, the distance between the surface of the adherend and the starting point in the third direction is X. １ [mm] In that case, The aforementioned label is, [Math 3] Satisfying the conditions A label medium according to claim 3, characterized by the following:

5. With the second end attached to the adherend, the intermediate portion in contact with the adherend, and the first end not attached to the adherend, the distance between the surface of the adherend and the first end in the third direction is X. ２ [mm] In that case, The aforementioned label is, [Math 4] Satisfying the conditions A label medium according to claim 4, characterized by the following:

6. The aforementioned label is, The third end, which is one end in the second direction, The fourth end, which is the other end in the second direction, It has, When the portion of the aforementioned intermediate section between the third end and the fourth end is designated as a specific intermediate section, The adhesive layer is At least on the first surface at the first end, second end, third end and fourth end, The aforementioned label is, The first end, second end, third end and fourth end have adhesive properties, The aforementioned specific intermediate portion does not have adhesive properties. A label medium according to any one of claims 1 to 5, characterized by the above.

7. The adhesive layer is At least in a specific region which is a part of the first surface in the middle portion of the label, The aforementioned label is, Having adhesive properties in the aforementioned specific region, The non-specific region of the first surface in the intermediate portion, excluding the specific region, does not have adhesive properties. A label medium according to any one of claims 1 to 5, characterized by the above.

8. The aforementioned label is, It has an indicator that shows the pressing position when attaching it to the object to be adhered to, The aforementioned indicators are, The label at the first and second ends is on the second side opposite to the first side. A label medium according to any one of claims 1 to 5, characterized by the above.

9. The aforementioned label is, It has an indicator that shows the pressing position when attaching it to the object to be adhered to, The aforementioned indicators are, The label at the first end, second end, third end, and fourth end is on the second side opposite to the first side. The label medium according to claim 6, characterized by the following:

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