Adhesive tape

Abstract

The present invention provides an adhesive tape which inhibits breakage at a hole line when the hole line is formed in a manufacturing process and which easily allows breakage at the hole line when used by a user. At least one hole line (4) each has a plurality of division sections (41) which divide a one-side region and a another-side region in a length direction of an adhesive tape (1), a connection section (42) which connects the one-side region and the another-side region in the length direction of the adhesive tape between each two of the plurality of division sections which are adjacent in a width direction of the adhesive tape, and a weak connection section (43) which connects the one-side region and the another-side region in the length direction of the adhesive tape, the weak connection section having a breaking strength which is less than a breaking strength of the connection section, the adhesive tape having at least one group of groups which are adjacent in the width direction of the adhesive tape by the connection section and the weak connection section.

Description

Technical Field

[0001] The present invention relates to an adhesive tape, for example, capable of removing dust or the like from the surface of an object to be cleaned by abutting against it. Background Technology

[0002] As an adhesive tape, there exists an adhesive tape that is rolled and stacked in the longitudinal direction to form a roll (see, for example, Japanese Patent No. 3272710). By rolling the roll over the surface of the object to be cleaned, such as a floor, dust and other particles on the surface of the object to be cleaned adhere to the adhesive layer exposed on the outer peripheral surface of the roll, thereby removing dust and other particles from the surface of the object to be cleaned.

[0003] The adhesive tape has eyelets connecting one end edge and the other end edge in the width direction. These eyelets allow for the separation of adjacent areas on one side and the other side in the length direction of the adhesive tape. Therefore, adhesive tape whose adhesion has weakened due to being covered by dust or other substances can be removed by unrolling the tape from its roll and breaking it at the eyelets. Summary of the Invention

[0004] Furthermore, in the manufacturing process, when forming the eyelets on the adhesive tape, the tape is typically rolled into a roll and then slits are cut radially in one go using a cutting tool. However, with this method of forming eyelets, since the eyelets are located at the same point circumferentially, dust can easily enter the interior of the roll, causing contamination. Additionally, the adhesive tape, which has a roughly circular cross-section, bends into a roughly V-shape at the eyelet area over time. This bend changes radially outward, for example, transforming into an irregular shape with folds, like a droplet, making it difficult to roll smoothly over the surface being cleaned. Moreover, since the eyelets are located at the same position on both the inner and outer layers, there are drawbacks such as users accidentally peeling off the two sheets of adhesive tape, making it difficult to unroll the tape.

[0005] Here, as in Japanese Patent No. 3272710, a structure is proposed in which the eyelets are formed at different positions on the inner and outer layers of the roll. This structure eliminates the aforementioned drawbacks. However, with this structure, since the eyelets cannot be placed at the same location in the circumferential direction, the eyelets need to be formed on the adhesive tape before winding into a roll.

[0006] That is, while mechanically winding the adhesive tape, perforations are formed on a sheet of adhesive tape. Therefore, if there are few connecting portions (the parts of the adhesive tape connected along its length between the slits of the perforations), the adhesive tape is prone to breakage during winding. If the adhesive tape breaks, the mechanical winding must be interrupted, thus reducing the manufacturing efficiency of the roll. This problem occurs significantly depending on the material of the adhesive tape's substrate (for example, when using recycled paper with low tensile strength). On the other hand, when the user uses the tape, it is easy to break it at the perforations if there are few connecting portions. Thus, a contradictory situation exists.

[0007] In view of the above, the object of the present invention is to provide an adhesive tape that suppresses breakage at the eyelet line during the formation of the eyelet line in the manufacturing process and facilitates breakage at the eyelet line during use by the user.

[0008] This technical solution is an adhesive tape, which is composed of a long strip. An adhesive layer is provided on one side of the strip. The adhesive tape has at least one eyelet extending between one end edge and the other end edge in the width direction of the long strip. Each of the at least one eyelet can separate adjacent side regions and opposite side regions in the length direction separated by the at least one eyelet. Each of the at least one eyelet has: multiple segmented portions that separate the side regions and the opposite side regions in the length direction of the adhesive tape; and connecting portions located in the multiple segmented portions within the adhesive layer. Between each pair of adjacent segments in the width direction of the adhesive tape, one side region and the other side region are connected in the length direction of the adhesive tape; and a weak connection portion, which is located in the portion of the plurality of segments between each pair of adjacent segments in the width direction of the adhesive tape where no connection portion is provided, connects one side region and the other side region in the length direction of the adhesive tape, the weak connection portion having a breaking strength less than the breaking strength of the connection portion, the adhesive tape having at least one group formed by the connection portion and the weak connection portion being adjacent in the width direction of the adhesive tape.

[0009] Alternatively, the adhesive tape may have at least one group consisting of two of the connecting portions arranged in the width direction of the adhesive tape in such a way that they sandwich at least one of the weak connecting portions.

[0010] Alternatively, the weak connection portion can be formed by a half-cut in the thickness direction of the adhesive tape.

[0011] Alternatively, the strip can be formed into a roll by winding and stacking in the length direction, and the at least one eyelet line is composed of multiple eyelet lines, which are staggered from each other in the circumferential direction on the outer and inner layers in the radial direction.

[0012] Alternatively, the dimension of the connecting part in the width direction of the adhesive tape may be 0.1 mm or more and 6.0 mm or less.

[0013] Alternatively, the dimension of the weak connection portion in the width direction of the adhesive tape may be 0.1 mm or more and 6.0 mm or less.

[0014] Alternatively, the connecting portion and the weak connecting portion may have a total of 3 or more but less than 24 locations in the width direction, wherein the weak connecting portion is 1 or more but less than 8 locations.

[0015] Alternatively, the adhesive tape may also have a substrate on which the adhesive layer is formed, the substrate being made of recycled paper.

[0016] Alternatively, the strip can be rolled up in the longitudinal direction to form a roll, and the adhesive tape has markings for confirming the position of the at least one eyelet line.

[0017] Alternatively, the strip can be rolled up in the length direction to form a roll, and when one side region is separated from the other side region, a reinforcing strip is attached to the end of the other side region along each of the at least one eyelet line.

[0018] Alternatively, the strip can be wound and stacked relative to the core in the length direction to form a roll, and the ratio of the outer diameter of the roll to the inner diameter of the core is 1.5 or more.

[0019] In addition, this technical solution is an adhesive tape, which is a strip-shaped body. The adhesive tape has an adhesive layer on one side and at least one eyelet line connecting one end edge and the other end edge in the width direction. It can separate adjacent one side region and the other side region in the length direction through the at least one eyelet line. The breaking strength of the portion with the at least one eyelet line is greater than 15.0N and less than 60.6N per 160mm width dimension. Attached Figure Description

[0020] Figure 1 This is a perspective view showing the state in which the outermost adhesive tape of an adhesive tape formed as a roll is pulled out by a region length, according to an embodiment of the present invention.

[0021] Figure 2 It means Figure 1 A three-dimensional diagram of the opposite side of the state.

[0022] Figure 3This is a perspective view showing the adhesive tape formed into the roll (in the state where the outermost layer of adhesive tape has not been pulled out).

[0023] Figure 4 The portion of the adhesive tape forming the roll is shown as a magnified radial view, with the adhesive layer around the connecting and weak connecting portions removed for clarity.

[0024] Figure 5 yes Figure 4 V-V cross-sectional view (emphasizing radial direction, omitting the illustration of the adhesive layer).

[0025] Figure 6 yes Figure 4 VI-VI cross-sectional view (emphasizing radial direction, omitting the illustration of the adhesive layer).

[0026] Figure 7 yes Figure 4 Section VII-VII (emphasis on radial direction, illustration of adhesive layer omitted). Detailed Implementation

[0027] Next, the present invention will be described using one embodiment. The adhesive tape 1 of this embodiment is composed of a long strip, with an adhesive layer 3 on one side surface of the strip. It has at least one perforation line 4 extending linearly between one end edge and the other end edge in the width direction of the long strip. This at least one perforation line 4 can separate adjacent side regions and the other side region in the length direction, separated by the at least one perforation line 4. For this adhesive tape 1, the adhesive layer 3 is formed by coating onto a sheet-like substrate 2. In this embodiment, the substrate 2 is composed of recycled paper. Furthermore, at the same thickness, recycled paper tends to have a lower tensile strength than new paper (paper newly made from pulp). In the width direction of the adhesive tape 1, the adhesive layer 3 is formed to be narrower than the substrate 2. Therefore, the adhesive layer 3 is not formed at either end of the adhesive tape 1 in the width direction.

[0028] In this embodiment, such as Figures 1-3 As shown, a roll 1R is formed by winding and stacking the adhesive tape 1 of the strip relative to the core 5 in the longitudinal direction. It is possible to make the ratio of the outer diameter (diameter) of the roll 1R to the inner diameter (diameter) of the core 5 1.5 or more. In this embodiment, it is approximately 1.8. However, a ratio less than 1.5 is also acceptable. Here, when the ratio is 1.5 or more, the diameter at the start of winding (approximately equal to the outer diameter of the core 5) and the diameter at the end of winding (the diameter of the roll 1R itself) differ significantly, therefore, it is necessary to pay attention to the tension control of the adhesive tape 1 when manufacturing the roll 1R.

[0029] In this embodiment, the roll 1R is manufactured by winding an adhesive tape 1 that has pre-formed eyelets 4 onto a strip (single sheet). If the ratio of the outer diameter of the roll 1R to the inner diameter of the core 5 becomes large, tension control in the longitudinal direction of the strip becomes difficult during manufacturing. Furthermore, if the eyelets 4 are formed simultaneously, tension control becomes even more difficult. Specifically, as described above, when the ratio is greater than 1.5, there is a tendency for winding the adhesive tape 1 to become particularly difficult. In this case, in this embodiment, as described later, by providing a combination of connecting portions 42 and weak connecting portions 43 on the eyelets 4, the tensile strength of the adhesive tape 1 in the strip state can be improved. Therefore, even if the ratio is very large (specifically, 1.5 or more), it is easier to form the roll 1R by winding the adhesive tape 1 onto the core 5 compared to cases where eyelets of other shapes are provided. Therefore, even a large-diameter roll 1R can be formed without problems.

[0030] like Figure 4 As shown, the eyelet wire 4 has a break portion 41, a connecting portion 42, and a weak connecting portion 43. The break portion 41 is the part where one side region and the other side region of the adhesive tape 1 are separated (not connected). In this embodiment, in the group 4A (described later) formed by two connecting portions 42 sandwiching one weak connecting portion 43, the dimension of the break portion 41 between the connecting portion 42 and the weak connecting portion 43 in the width direction of the adhesive tape 1 is 18.5 mm. In addition, the dimension of the break portion 41 between two adjacent groups 4A, 4A is 40 mm in the width direction of the adhesive tape 1. Furthermore, the dimension of the break portion 41 is determined according to the dimensions of the connecting portion 42 and the weak connecting portion 43, and is therefore not limited to the above values.

[0031] The connecting portion 42 is located between adjacent segments 41, 41 in the width direction of the adhesive tape 1, and is the portion connecting one side region and the other side region in the length direction of the adhesive tape 1. At the connecting portion 42, the one side region and the other side region are completely connected without any defects in the thickness direction (see reference). Figure 5 , Figure 6 The connecting portion 42 is formed with a size ranging from 0.1 mm to 6.0 mm in the width direction of the adhesive tape 1. The size range is preferably 0.2 mm to 4.5 mm, more preferably 0.5 mm to 3.5 mm. In this embodiment, it is 2.0 mm. As long as the connecting portion 42 is within this size range, the effect of providing the weak connecting portion 43 can be significantly obtained.

[0032] The weak connection portion 43 is the portion located between adjacent segments 41, 41 in the width direction of the adhesive tape 1 where no connection portion 42 is provided. The weak connection portion 43 is formed with a size ranging from 0.1 mm to 6.0 mm in the width direction of the adhesive tape 1. The size range is preferably 0.2 mm to 4.5 mm, more preferably 0.5 mm to 3.5 mm. In this embodiment, it is 3.0 mm. Here, it is the same as the connection portion 42 in that one side region of the adhesive tape 1 is connected to the other side region in the length direction, but its breaking strength is lower than that of the connection portion 42. The weak connection portion 43 is formed by a half-cut midway along the thickness direction of the adhesive tape 1 towards the radially outer side (see reference). Figure 5 , Figure 7 By utilizing half-cutting, a known method, weak connections 43 can be easily formed.

[0033] The eyelet line 4 is formed by pressing a cutting blade (not shown) against the adhesive tape 1 of the strip in the thickness direction and intermittently cutting it in the width direction. The cutting blade cuts the substrate 2 and adhesive layer 3 to their full thickness at the dividing point 41, leaves the connecting point 42 uncut, and cuts the substrate 2 and adhesive layer 3 to approximately half their thickness at the weak connecting point 43. (Note: at...) Figure 4 In this configuration, no line extending along the width direction of the adhesive tape 1 is visible at the connecting portion 42, while a line extending along the width direction of the adhesive tape 1 is visible at the weak connecting portion 43. Thus, the separating portion 41, the connecting portion 42, and the weak connecting portion 43 are formed respectively. Furthermore, the cutting degree of the thickness dimension at the weak connecting portion 43 can be arbitrarily set.

[0034] The adhesive tape 1 has at least one group consisting of connecting portions 42 and weak connecting portions 43 adjacent to each other in the width direction of the adhesive tape 1. More specifically, it has at least one group 4A consisting of two connecting portions 42 arranged in a manner that sandwiches at least one weak connecting portion 43 in the width direction of the adhesive tape 1. In this embodiment, if the connecting portions 42 and weak connecting portions 43 are indicated by reference numerals, they are arranged in the width direction as "42-43-42-42-43-42". Therefore, as Figure 4 As shown, group 4A ("42-43-42") consists of two sets of repeating units arranged in the width direction of the adhesive tape 1, with two connecting portions 42 sandwiching a weak connecting portion 43. By placing the two connecting portions 42 (with higher breaking strength) on both sides of at least one weak connecting portion 43 (with lower breaking strength), a balance in strength (specifically related to breaking strength) can be achieved.

[0035] In the adhesive tape 1, the number of connecting portions 42 and weak connecting portions 43 combined in the width direction is 3 or more and 24 or less. The number of weak connecting portions 43 is 1 or more and 8 or less. By setting the number of connecting portions 42 and weak connecting portions 43 to these values, optimal conditions can be achieved that balance the ease of breaking the adhesive tape 1 during use and the difficulty of breaking it during manufacturing. In this embodiment, the total number of connecting portions 42 and weak connecting portions 43 is 6. The number of weak connecting portions 43 is 2.

[0036] Furthermore, the breaking strength of the portion with the perforation 4 is greater than 15.0 N and less than 60.6 N per 160 mm width dimension. This breaking strength is preferably 20 N or more, more preferably 25 N or more, more preferably 50 N or less, and more preferably 40 N or less. For example, to measure the breaking strength, a sample of the adhesive tape 1 is prepared, and an auxiliary board, such as corrugated paper, is attached in the thickness direction to one side and the other side of the perforation 4, with the auxiliary board partially clamped. The test is then performed using a tensile testing machine.

[0037] Here, the test results of the breaking strength conducted by the inventors of this application are briefly described. The width of the adhesive tape 1 specimen was 160 mm, and the tensile testing machine was used at a tensile speed of 300 mm / min to measure the peak force at which the perforation line 4 broke along the entire width of the specimen. Five measurements were performed using specimens with the same structure. As a specimen close to this embodiment, a specimen with a recycled paper substrate, polyethylene laminated, and having four connecting portions 42 (2 mm in length along the width of the adhesive tape 1) and two weak connecting portions 43 (2 mm in length along the width of the adhesive tape 1) was used. Using this specimen, the average breaking strength (in N) was 29.1. Furthermore, the measured values ​​were 27.7, 30.3, 30.6, 29.6, and 27.3. Additionally, both the cutability (ease of breaking) during use and the breakability (ease of fracture) during manufacturing were good for this specimen. Furthermore, the cutability is a human sensory evaluation. In addition, regarding the breakage property, the ability of the adhesive tape 1 to be wound up without breaking during the manufacture of the roll 1R is evaluated as "good".

[0038] On the other hand, as a first comparative example, for an adhesive tape with a substrate of recycled paper, laminated with polyethylene, and having four connecting portions 42 (each 2 mm long in the width direction of the adhesive tape 1) (without weak connecting portions 43), the average tensile strength was 15.0 N. Furthermore, the measured values ​​were 13.2, 14.7, 15.4, 18.2, and 13.7. In this example, it is assumed that the cutability (ease of breaking) during use is good, but the fractureability (ease of breaking) during manufacturing is defective (easily broken). This is considered to be the effect of not forming weak connecting portions 43.

[0039] In addition, as a second comparative example, for an adhesive tape with a recycled paper substrate, polyethylene lamination, and 16 connecting portions 42 (2 mm in length in the width direction of the adhesive tape 1) (without weak connecting portions 43), the average tensile strength was 65.7 N. The measured values ​​were 62.6, 55.2, 71.4, 65.6, and 73.5. In addition, as a third comparative example, for an adhesive tape with a new paper substrate (specifically, pure white paper), polyethylene lamination, and 16 connecting portions 42 (2 mm in length in the width direction of the adhesive tape 1) (without weak connecting portions 43), the average tensile strength was 60.6 N. The measured values ​​were 55.8, 60.6, 71.0, 49.6, and 66.3. These examples are considered to have good fracture properties (ease of breakage) during manufacturing, but defects in cutability (ease of breaking) during use (difficult to break). This is believed to be due to the large number of connecting portions 42.

[0040] Next, the test results of the tear strength conducted by the inventors of this application are briefly described. A specimen was prepared by cutting the adhesive tape 1 into 50mm wide pieces with the eyelet line 4 centered (i.e., the eyelet line 4 is located in the center of the width direction). One side of the specimen, separated from the eyelet line 4, was mounted on the upper clamp of a tensile testing machine, and the other side was mounted on the lower clamp. The tensile speed of the tensile testing machine was set to 300mm / min. The peak force at fracture was measured for the connecting portion 42 and the weak connecting portion 43, respectively. Three measurements were performed using specimens with the same structure.

[0041] As a sample similar to that used in this embodiment, the same test as the tensile strength test was conducted. The sample had a recycled paper substrate, was laminated with polyethylene, and had four connecting portions 42 (2 mm in length along the width of the adhesive tape 1) and two weak connecting portions 43 (2 mm in length along the width of the adhesive tape 1). Using this sample, the test results showed that the average tear strength (in N) at the connecting portions 42 was 0.8. Furthermore, all three measurements were 0.8. Then, the average tear strength (in N) at the weak connecting portions 43 was 0.6. Furthermore, all three measurements were 0.6.

[0042] As can be seen from the aforementioned test results, by providing a weak connection portion 43 in addition to the connecting portion 42 in the eyelet thread 4, the breaking strength can be improved. Furthermore, the weak connection portion 43 is a portion partially separated in the thickness direction using a half-cut or similar method; therefore, compared to adding the connecting portion 42, it can suppress the increase in resistance to the user's breaking action. Thus, it is possible to balance the ease of breaking the adhesive tape 1 during use with the difficulty of breaking it during manufacturing. Regarding the difficulty of breaking it during manufacturing, as will be described later, in the roll 1R, in order to form the eyelet threads 4 circumferentially offset on the outer and inner layers in the radial direction (… Figure 6 , Figure 7 To form the eyelet 4, the adhesive tape 1, before being rolled into a roll 1R, needs to be partially cut. In this case, since the eyelet 4 is formed on a sheet of adhesive tape 1, there is a possibility that the connecting portion 42 may be pulled by tension in the longitudinal direction, causing the adhesive tape 1 to break. If only the ease of breaking when the user uses the adhesive tape 1 is considered, the number of connecting portions 42 can be reduced. However, this would result in the disadvantage of easy breakage during manufacturing. In this embodiment, by combining the connecting portion 42 and the weak connecting portion 43, it is possible to increase the difficulty of breakage during manufacturing while suppressing the difficulty of breaking the adhesive tape 1 during use.

[0043] In addition, in this embodiment, the substrate 2 is made of recycled paper, but the strength of recycled paper is worse than that of new paper. Even so, it is possible to balance the ease of breaking the adhesive tape 1 during use and the difficulty of breaking it during manufacturing.

[0044] In addition, by providing the weak connection portion 43, when the user disconnects the adhesive tape 1 during use, the weak connection portion 43 is more likely to break than the reinforcing tape 7 described later. Therefore, it is possible to prevent the reinforcing tape 7 from being torn apart along with the substrate 2, and the adhesive tape 1 can be neatly disconnected at the eyelet line 4.

[0045] Furthermore, in the roll 1R of this embodiment, multiple perforation lines 4-4 on the outer and inner layers in the radial direction are staggered from each other in the circumferential direction (see connecting part 42). Figure 6 weak connection part 43 (refer to) Figure 7 In this embodiment, the length of a region between the eyelets 4, 4 of the adhesive tape 1 is set such that the portion of the adhesive tape 1 that is wound is longer than the circumferential 360° length of the roll 1R, resulting in a staggered arrangement where the outer layer covers the inner layer at the eyelet 4 position. By staggering the eyelets 4 in this way, compared to a structure where the eyelets 4-4 are aligned circumferentially, it is easier to break at each eyelet 4, and it is possible to prevent the cross-sectional shape of the roll 1R from deviating from a roughly circular shape as in the past. Furthermore, it has the advantage that even if the outer layer of adhesive tape 1 is contaminated by dust or the like, the inner layer of adhesive tape 1 will not be contaminated because it is covered by the outer layer of adhesive tape 1.

[0046] Furthermore, the roll 1R of this embodiment has a mark 6 for identifying the position of the eyelet line 4. To separate one side of the adhesive tape 1 from the other, the user can easily locate the eyelet line 4 using this mark 6. The mark 6 can be positioned in relation to the eyelet line 4. For example, it can be positioned along the eyelet line 4 or overlapped with it. The shape and color of the mark 6 are not particularly limited. The mark 6 can be formed, for example, by printing onto the adhesive tape 1. Alternatively, it can be formed as a separate item from the adhesive tape 1, similar to the reinforcing tape 7 of this embodiment, and can be adhered to the adhesive tape 1.

[0047] When one side of the adhesive tape 1 is separated from the other side, a reinforcing strip 7 is attached to the longitudinal end of the other side along the eyelet line 4. The longitudinal dimension of the reinforcing strip 7 is slightly smaller than the width dimension of the adhesive tape 1. In this embodiment, the width dimension is 3 mm and the thickness dimension is approximately 0.6 mm. These dimensions are not limited to these and various modifications are possible. The increased thickness of the reinforcing strip 7 creates rigidity, allowing for easier breaking at the eyelet line 4. This reinforcing strip 7 is an elongated strip extending along the width direction of the adhesive tape 1, and its color differs from the substrate 2 and adhesive layer 3, thus serving as the marker 6. Furthermore, various modifications are possible to the shape surrounding the reinforcing strip 7.

[0048] The above describes one embodiment of the present invention, but the present invention is not limited to the described embodiment and various modifications can be made without departing from the spirit of the present invention.

[0049] For example, in the described embodiment, the material of substrate 2 is recycled paper. However, it is not limited to this; for example, the material may also be new paper such as pure white paper, non-woven fabric, resin film, or sheet-like foam. In addition, lamination or release treatment (e.g., silicone coating) may be applied to the surface of each material.

[0050] Furthermore, in the described embodiment, if the connecting portion 42 and the weak connecting portion 43 are indicated by reference numerals, they are arranged in the width direction as "42-43-42-42-43-42", and the structure of a group 4A (a group of repeating units) formed by the connecting portions 42 and 42 sandwiching the weak connecting portion 43 is "42-43-42". However, the arrangement of the connecting portion 42 and the weak connecting portion 43 is not limited to this. For example, it can also be arranged as "42-43-43-42", "43-42-42-43", and "42-43-42-43".

[0051] Furthermore, in the case where the eyelet lines 4-4 on the outer and inner layers of the roll 1R are staggered in the radial direction, in this embodiment, the length of a region between the eyelet lines 4, 4 of the adhesive tape 1 is set such that the portion of the adhesive tape 1 that is wound is greater than the circumferential 360° length of the roll 1R, resulting in a staggered arrangement where the outer layer covers the inner layer at the position of each eyelet line 4. However, conversely, the length of a region between the eyelet lines 4, 4 of the adhesive tape 1 can also be set such that the portion of the adhesive tape 1 that is wound is less than the circumferential 360° length of the roll 1R, resulting in a staggered arrangement where a portion of the inner layer is exposed from the outer layer at the position of each eyelet line 4.

[0052] The following summarizes the structure and function related to the described embodiment. The embodiment is an adhesive tape 1, which is composed of a long strip-shaped body. An adhesive layer 3 is provided on one side of the strip-shaped body. The adhesive tape has at least one eyelet line 4 extending between one end edge and the other end edge in the width direction of the long strip-shaped body. Each of the at least one eyelet line 4 can separate adjacent side regions and side regions in the length direction separated by the at least one eyelet line 4. Each of the at least one eyelet line 4 has: a plurality of dividing portions 41 that separate the side region and the side region in the length direction of the adhesive tape 1; and a connecting portion 42 located in the plurality of dividing portions 41 that are adjacent in the width direction of the adhesive tape 1. Between each pair of adjacent segments 41, 41, one side region and the other side region are connected in the length direction of the adhesive tape 1; a weak connection portion 43 is located in the portion of the plurality of segments 41 between each pair of adjacent segments 41, 41 in the width direction of the adhesive tape 1 where the connection portion 42 is not provided, and connects the one side region and the other side region in the length direction of the adhesive tape 1, the breaking strength of the weak connection portion 43 is less than the breaking strength of the connection portion 42, and the adhesive tape 1 has at least one group formed by the connection portion 42 and the weak connection portion 43 being adjacent in the width direction of the adhesive tape 1.

[0053] According to this structure, by setting the weak connection part 43, it is possible to balance the ease of breaking the adhesive tape 1 during use and the difficulty of breaking it during manufacturing.

[0054] Alternatively, the adhesive tape may have at least one group 4A consisting of two connecting portions 42, 42 arranged in the width direction of the adhesive tape 1, sandwiching at least one weak connecting portion 43.

[0055] According to this structure, by placing the two connecting portions 42, 42 on both sides of at least one weak connecting portion 43, a balance in strength can be achieved.

[0056] Alternatively, the weak connection portion 43 may be formed by a half-cut in the thickness direction of the adhesive tape 1.

[0057] According to this structure, the weak connection part 43 can be easily formed by using half-cutting, which is a known method.

[0058] Alternatively, the strip can be rolled and stacked in the length direction to form a roll 1R, and the at least one eyelet line 4 is composed of multiple eyelet lines 4-4, which are staggered in the circumferential direction on the outer and inner layers in the radial direction.

[0059] According to this structure, compared with the structure in which multiple eyelets 4-4 are consistent in the circumferential direction, it is easier to break at each eyelet 4, and it can suppress the cross-sectional shape of the roll 1R from deviating from a roughly circular shape.

[0060] Alternatively, the dimension of the connecting portion 42 in the width direction of the adhesive tape 1 may be 0.1 mm or more and 6.0 mm or less.

[0061] According to this structure, as long as the connection part 42 is within this size range, the effect brought about by setting the weak connection part 43 can be significantly obtained.

[0062] Alternatively, the dimension of the weak connection portion 43 in the width direction of the adhesive tape 1 may be 0.1 mm or more and 6.0 mm or less.

[0063] According to this structure, as long as the weak connection portion 43 is within this size range, the effect brought about by providing the weak connection portion 43 in combination with the connection portion 42 can be significantly obtained.

[0064] Alternatively, the connecting portion 42 and the weak connecting portion 43 may have a total of 3 or more but less than 24 locations in the width direction, wherein the weak connecting portion 43 may have 1 or more but less than 8 locations.

[0065] Based on this structure, it is possible to achieve optimal conditions that balance the ease of breaking the adhesive tape 1 during use and the difficulty of breaking it during manufacturing.

[0066] Alternatively, the adhesive tape may also have a substrate 2 on which the adhesive layer 3 is formed, the substrate 2 being made of recycled paper.

[0067] According to this structure, the strength of recycled paper is lower than that of new paper, but even so, it can balance the ease of breaking the adhesive tape 1 during use and the difficulty of breaking it during manufacturing.

[0068] Alternatively, the strip can be wound and stacked in the longitudinal direction to form a roll 1R, and the adhesive tape has a mark 6 for confirming the position of the eyelet line 4.

[0069] According to this structure, in order to separate one side of the area from the other side, the user can easily find at least one eyelet line 4.

[0070] Alternatively, the strip can be rolled and stacked in the length direction to form a roll 1R, and when the one side region is separated from the other side region, a reinforcing strip 7 is attached to the end of the other side region along each of the at least one eyelet line 4.

[0071] According to this structure, rigidity is generated in the reinforcing band 7, thus making it easier to achieve disconnection at each of the at least one eyelet line 4.

[0072] Alternatively, the strip can be wound and stacked relative to the core 5 in the length direction to form a roll 1R, wherein the ratio of the outer diameter of the roll 1R to the inner diameter of the core 5 is 1.5 or more.

[0073] Based on this structure, large-diameter coils 1R can also be formed.

[0074] Additionally, the embodiment described is an adhesive tape, which is a strip-shaped body. The adhesive tape 1 has an adhesive layer 3 on one side and at least one eyelet line 4 connecting one end edge and the other end edge in the width direction. It is capable of separating adjacent one side region and the other side region in the length direction through the at least one eyelet line 4. The breaking strength of the portion with the at least one eyelet line 4 is greater than 15.0N and less than 60.6N per 160mm width dimension.

[0075] According to this structure, by setting the fracture strength of the portion having at least one eyelet 4 to this range, it is possible to both suppress the breakage of the eyelet 4 and make it easy for the user to break it using the eyelet 4.

[0076] According to the above-described embodiments, when forming the eyelet 4 during the manufacturing process, breakage of the eyelet 4 can be suppressed. On the other hand, it is easy for the user to break the eyelet 4 during use.

Claims

1. An adhesive tape comprising a strip of elongated material having an adhesive layer on one side surface, the adhesive tape having at least one eyelet extending between one end edge and another end edge in the width direction of the strip of elongated material, each of the at least one eyelet capable of separating adjacent side regions and opposite side regions in the length direction separated by the at least one eyelet, wherein, Each of the at least one eyelet thread has: Multiple segmented portions that separate one side region and the other side region along the length direction of the adhesive tape; A connecting portion, located between each pair of adjacent segments in the width direction of the adhesive tape, connects one side region to the other side region in the length direction of the adhesive tape. as well as A weak connection portion, located in the portion of the plurality of segments between two adjacent segments in the width direction of the adhesive tape where no connecting portion is provided, connects one side region and the other side region in the length direction of the adhesive tape. The breaking strength of this weak connection portion is less than the breaking strength of the connecting portion. The adhesive tape has at least one group consisting of the connecting portion and the weak connecting portion being adjacent to each other in the width direction of the adhesive tape.

2. The adhesive tape according to claim 1, wherein, The adhesive tape has at least one group consisting of two of the connecting portions arranged in the width direction of the adhesive tape, sandwiching at least one of the weak connecting portions.

3. The adhesive tape according to claim 1 or 2, wherein, The weak connection portion is formed by a half-cut in the thickness direction of the adhesive tape.

4. The adhesive tape according to claim 1 or 2, wherein, The strip is rolled up and stacked along its length to form a roll. The at least one eyelet line is composed of multiple eyelet lines, which are staggered from each other in the circumferential direction on the outer and inner layers in the radial direction.

5. The adhesive tape according to claim 1, wherein, The dimension of the connecting part in the width direction of the adhesive tape is 0.1 mm or more and 6.0 mm or less.

6. The adhesive tape according to claim 1, wherein, The dimension of the weak connection portion in the width direction of the adhesive tape is 0.1 mm or more and 6.0 mm or less.

7. The adhesive tape according to claim 5 or 6, wherein, The connecting portion and the weak connecting portion are provided in a total of 3 to 24 locations in the width direction, wherein the weak connecting portion is 1 to 8 locations.

8. The adhesive tape according to claim 1 or 2, wherein, The adhesive tape also has a substrate on which the adhesive layer is formed, the substrate being made of recycled paper.

9. The adhesive tape according to claim 1 or 2, wherein, The strip is rolled up and stacked along its length to form a roll. The adhesive tape has markings for confirming the location of the at least one eyelet line.

10. The adhesive tape according to claim 1 or 2, wherein, The strip is rolled up and stacked along its length to form a roll. When one side region is disconnected from the other side region, a reinforcing strip is attached to the length end of the other side region along each of the at least one eyelet line.

11. The adhesive tape according to claim 1 or 2, wherein, The strip is wound and stacked relative to the core in the longitudinal direction to form a roll. The ratio of the outer diameter of the roll to the inner diameter of the core is 1.5 or more.

12. The adhesive tape according to claim 1 or 2, wherein, The breaking strength of the portion having at least one eyelet is greater than 15.0 N and less than 60.6 N per 160 mm width dimension.

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