Packing tape

Abstract

Controls the direction of fracture in packaging tapes. [Solution] The device has a first strip-shaped member and a second strip-shaped member overlapping the first strip-shaped member, wherein a first break induction wire is formed in a first region where the first and second strip-shaped members overlap, and a second break induction wire and a third break induction wire are formed in a second region where they do not overlap, wherein the first and second break induction wires are arranged in a direction along the longitudinal direction, and the third break induction wire is arranged in a direction along the width direction, wherein the second break induction wire is arranged closer to the first break induction wire than the third break induction wire in the width direction, and both ends of the first break induction wire in the longitudinal direction are inclined in a direction such that the longitudinal separation distance increases as they approach the second break induction wire, and the first, second, and third break induction wires are arranged at intervals along the entire length in the longitudinal direction.

Description

[Technical Field]

[0001] The present invention relates to packaging tape. [Background technology]

[0002] Patent Document 1 discloses a packaging tape having a base tape and a core tape superimposed on the base tape. A package sealed with the packaging tape can be opened by peeling the core tape off the package and breaking the base tape. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-27438 Summary of the Invention [Problem to be solved by the invention]

[0004] In the core tape of Patent Document 1, the direction of tearing of the base tape when the core tape is peeled off is along the longitudinal direction. However, during the peeling process, the direction of tearing may deviate from the longitudinal direction. This affects the ease of opening the packaging tape.

[0005] In this type of packaging tape, there is a need to be able to control the direction of tearing in order to make it easier to open the packaging material. [Means for solving the problem]

[0006] The present invention provides a first strip-shaped member; a second belt-shaped member provided on one surface in the thickness direction of the first belt-shaped member, the second belt-shaped member is provided along the longitudinal direction of the first belt-shaped member between one end and the other end in the width direction of the first belt-shaped member, a first breakage guide wire formed in a first region where the first belt-shaped member and the second belt-shaped member overlap; a second break induction wire and a third break induction wire formed in a second region where the first belt-shaped member and the second belt-shaped member do not overlap, The first breakage guide wire and the second breakage guide wire are provided in a direction along the longitudinal direction, The third breakage guide wire is provided in a direction along the width direction, In the width direction, the second breakage guiding wire is provided closer to the first breakage guiding wire than the third breakage guiding wire, The first breakage guide wire has both ends in the longitudinal direction located closer to the second breakage guide wire than a central portion, The both end portions are inclined in a direction in which the separation distance in the longitudinal direction increases as the both end portions approach the second breakage guide line, The packing tape is configured such that the first breakage guiding wire, the second breakage guiding wire, and the third breakage guiding wire are each provided at intervals over the entire length in the longitudinal direction. [Effects of the Invention]

[0007] According to the present invention, the direction of tear progression in the packing tape can be controlled. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 10 is a diagram illustrating a packing tape. [Figure 2] FIG. 10 is a diagram illustrating a packing tape. [Figure 3] FIG. 10 is a diagram illustrating a packing tape. [Figure 4] 1A and 1B are diagrams illustrating a first example of use of the packaging tape. [Figure 5] 1A and 1B are diagrams illustrating a first example of use of the packaging tape. [Figure 6] 10A and 10B are diagrams illustrating a second example of use of the packing tape. [Figure 7]10A and 10B are diagrams illustrating a second example of use of the packing tape. [Figure 8] 10A and 10B are diagrams illustrating a second example of use of the packing tape. [Figure 9] 10A and 10B are diagrams illustrating a packing tape according to a first modified example. [Figure 10] 10A and 10B are diagrams illustrating a packing tape according to a second modification. [Figure 11] 10A and 10B are diagrams illustrating an example of use of a packing tape according to Modification 2. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described. 1 and 2 are diagrams illustrating the packing tape 7. FIG. FIG. 1 is a perspective view of the packing tape 7. FIG. Fig. 2(a) is an enlarged view of region A in Fig. 1. Fig. 2(b) is a schematic view of the AA cross section of Fig. 2(a). In addition, in Fig. 1 and Fig. 2(a), the core material tape 9 is cross-hatched to make the position of the core material tape 9 easier to understand. 2, the thicknesses of the base tape 8, core tape 9, and adhesive layer 85 are exaggerated, but in reality, the packaging tape 7 is thin enough that it functions as a single adhesive tape when the base tape 8 and core tape 9 are stacked together. Also, the sizes and spacing of the first break guiding wire 1 to the fifth break guiding wire 5 are shown schematically.

[0010] (Packing tape 7) As shown in FIG. 1, the packing tape 7 has a configuration in which a strip-shaped base tape 8 (first strip-shaped member) and a strip-shaped core tape 9 (second strip-shaped member) are overlapped.

[0011] As shown in FIG. 2(b), the base tape 8 has a strip-shaped base portion 80. One surface 81 of the base 80 in the thickness direction is provided with a layer of adhesive (adhesive layer 85) whose main component is resin, rubber, or the like. The adhesive layer 85 is provided over the entire surface of the one surface 81 of the base 80. The other surface 82 of the base 80 in the thickness direction is provided with a layer of release agent (release layer) whose main component is silicon or the like (not shown). The release layer is provided over the entire surface of the other surface 82 of the base 80.

[0012] A core tape 9 is attached to the adhesive layer 85 of the base tape 8. The core tape 9 has approximately the same overall length as the overall length of the base tape 8 in the longitudinal direction, and is provided on the base tape 8 over the entire length in the longitudinal direction (see FIG. 1).

[0013] As shown in FIG. 2(b), the core tape 9 has a strip-shaped base portion 90. The other surface 92 of the base 90 in the thickness direction is attached to the adhesive layer 85 of the base tape 8. One surface 91 of the base 90 in the thickness direction is provided with a layer of a release agent (release layer) containing silicon or the like as a main component (not shown). The release layer is provided over the entire surface 91 of the base 90. An adhesive layer may also be provided on the other surface 92 of the base 90.

[0014] As shown in FIG. 1, the width W9 of the core tape 9 is narrower than the width W8 of the base tape 8 (W9 <W8)。 As shown in FIG. 2(b), the core tape 9 is overlapped in the thickness direction on the base tape 8 at positions spaced apart from one end 83 and the other end 84 of the base tape 8 in the width direction.

[0015] As shown in (a) of Figure 2, when viewed from the overlapping direction of the base tape 8 and the core tape 9 (front-to-back direction on the paper in the figure), the midline of the core tape 9 in the width direction is aligned with the midline Xc of the base tape 8.

[0016] Therefore, when viewed from the overlapping direction of the base tape 8 and the core tape 9, the packaging tape 7 is divided into an area Ra where the base tape 8 and the core tape 9 overlap, and an area Rb where the base tape 8 and the core tape 9 do not overlap. The area Rb where the base tape 8 and the core tape 9 do not overlap is provided on one side and the other side of the area Ra in the width direction. In the packing tape 7 according to this embodiment, the region Ra where the base tape 8 and the core tape 9 overlap constitutes the first region, and the region Rb where the base tape 8 and the core tape 9 do not overlap constitutes the second region. In the following description, the region Ra where the base tape 8 and the core tape 9 overlap, and the region Rb where the base tape 8 and the core tape 9 do not overlap, will also be simply referred to as region Ra and Rb.

[0017] As shown in FIG. 2(a), the packing tape 7 has a plurality of breakage guide lines formed thereon to guide the packing tape 7 to break. 2(b), the region Ra is formed with a first fracture guiding wire 1. The first fracture guiding wire 1 penetrates both the base tape 8 and the core tape 9 in the thickness direction. Further, regions Rb, Rb are respectively formed with a second break induction wire 2, a third break induction wire 3, a fourth break induction wire 4, and a fifth break induction wire 5. These second break induction wire 2 to fifth break induction wire 5 penetrate the base tape 8 in the thickness direction.

[0018] 2(a), the first break induction wires 1 to the fifth break induction wires 5 are spaced apart from one another in the width direction. The first break induction wires 1 to the fifth break induction wires 5 are respectively provided in an area from the intermediate line Xc to one end 83 of the base tape 8 and an area from the other end 84 of the base tape 8. The first break induction wires 1 to the fifth break induction wires 5 provided from the intermediate line Xc to one end 83 of the base tape 8 and the first break induction wires 1 to the fifth break induction wires 5 provided from the intermediate line Xc to the other end 84 of the base tape 8 are arranged symmetrically with respect to the intermediate line Xc.

[0019] As shown in the enlarged area of ​​FIG. 2(a), the first fracture induction wire 1 is a linear cut formed in the longitudinal direction. Specifically, the first breakage induction wire 1 has a first slit 11 formed along a straight line Lx1 parallel to the middle line Xc, a linear second slit 12 formed along a straight line Lp intersecting the straight line Lx, and a linear third slit 13 formed along a straight line Lq intersecting the straight lines Lx and Lp. The second slit 12 and the third slit 13 constituting the first breakage induction wire 1 are straight lines including a longitudinal component and a widthwise component.

[0020] The second slit 12 and the third slit 13 are connected to one end and the other end of the first slit 11 (center portion), respectively, and constitute both ends of the first breakage-inducing wire 1. The second slit 12 and the third slit 13 are inclined in a direction such that the distance L1 between them increases as they approach the second breakage-inducing wire 2, which will be described later. In this embodiment, the inclination angle θ of the second slit 12 and the third slit 13 relative to the first slit 11 is set to 45°. The inclination angle θ of the second slits 12 and the third slits 13 may be an angle other than 45°. By setting it to 45°, the longitudinal and widthwise components of the second slits 12 and the third slits 13 can be made equal, making it easier to induce breakage in both the longitudinal and widthwise directions.

[0021] 2(a), a plurality of first break guide wires 1 are provided at intervals CL1 in the direction of the straight line Lx1. The plurality of first break guide wires 1 are provided over the entire length of the packing tape 7 in the longitudinal direction.

[0022] In the width direction, a second break induction wire 2 is provided at a position adjacent to the first break induction wire 1. The second break induction wire 2 is a linear cut formed along a straight line Lx2 parallel to the middle line Xc.

[0023] A plurality of second breaking guide lines 2 are provided at intervals CL2 in the direction of the straight line Lx2. The interval CL2 between the second breaking guide lines 2 in the direction of the straight line Lx2 is set to be narrower than the interval CL1 of the first breaking guide line 1 (CL2 < CL1). The plurality of second breaking guide lines 2 are provided in a range covering the entire longitudinal length of the packing tape 7.

[0024] In the width direction, third breaking guide lines 3 are provided at positions adjacent to one end 83 and the other end 84 of the base tape 8. The third breaking guide line 3 is a linear cut formed along a straight line Ly1 orthogonal to the intermediate line Xc. A plurality of third breaking guide lines 3 are provided at intervals CL3 in the direction of a straight line Lx3 parallel to the intermediate line Xc. The plurality of third breaking guide lines 3 are provided in a range covering the entire longitudinal length of the packing tape 7.

[0025] In the width direction, fourth breaking guide lines 4 are provided at positions adjacent to the third breaking guide line 3 on the side of the intermediate line Xc. The fourth breaking guide line 4 is a linear cut formed along a straight line Ly2 parallel to the straight line Ly1. A plurality of fourth breaking guide lines 4 are provided at intervals CL4 in the direction of a straight line Lx4 parallel to the intermediate line Xc. The interval CL4 between the adjacent fourth breaking guide lines 4, 4 in the direction of the straight line Lx4 is substantially the same as the interval CL3 between the adjacent third breaking guide lines 3, 3 in the direction of the straight line Lx3 (CL4 ≒ CL3). The plurality of fourth breaking guide lines 4 are provided in a range covering the entire longitudinal length of the packing tape 7.

[0026] The fourth breaking guide line 4 is provided at an interval Dy1 in the width direction and an interval Dx in the longitudinal direction with respect to the third breaking guide line 3. Therefore, the fourth breaking guide line 4 is provided offset from the third breaking guide line 3 in both the longitudinal and width directions.

[0027] The distance Dx between the fourth breaking induction line 4 and the third breaking induction line 3 adjacent to each other in the longitudinal direction is set to approximately half the length of the distance CL3 between the third breaking induction lines 3 adjacent to each other in the longitudinal direction (Dx ≒ CL3 / 2). Therefore, when looking at the packing tape 7 in the width direction, the third breaking induction line 3 and the fourth breaking induction line 4 are arranged alternately at intervals of Dx in the longitudinal direction.

[0028] In the width direction, a fifth breaking induction line 5 is provided between the second breaking induction line 2 and the fourth breaking induction line 4. The distance Dy3 between the second breaking induction line 2 and the fifth breaking induction line 5 in the width direction is set to a narrower distance than the distance Dy2 between the fourth breaking induction line 4 and the fifth breaking induction line 5 (Dy3 < Dy2). Note that the distance Dy2 between the fourth breaking induction line 4 and the fifth breaking induction line 5 is set to a wider distance than the distance Dy1 between the third breaking induction line 3 and the fourth breaking induction line 4 described above (Dy2 > Dy1).

[0029] The fifth breaking induction line 5 is a linear notch formed on a straight line Ly1 passing through the third breaking induction line 3. Therefore, when looking at the packing tape 7 in the longitudinal direction, the fifth breaking induction line 5 is arranged so as not to overlap the fourth breaking induction line 4.

[0030] A plurality of fifth breaking induction lines 5 are provided at intervals of CL5 in the direction of a straight line Lx5 parallel to the intermediate line Xc. The interval CL5 between the fifth breaking induction lines 5 adjacent to each other in the direction of the straight line Lx5 is an interval that substantially matches the interval CL3 between the third breaking induction lines 3 adjacent to each other in the direction of the straight line Lx3 (CL5 ≒ CL3). The plurality of fifth breaking induction lines 5 are provided in a range covering the entire longitudinal length of the packing tape 7.

[0031] In this embodiment, the cutting in the width direction of the packing tape 7 is induced by the first breaking induction line 1 and the second breaking induction line 2 formed in the direction along the longitudinal direction. In addition, the third break induction wire 3 to the fifth break induction wire 5 formed in the direction along the width direction, and the second slit 12 and the third slit 13 of the first break induction wire 1 formed in the direction of the straight lines Lp and Lq that intersect in the longitudinal direction, are designed to guide cutting of the packing tape 7 in the longitudinal direction.

[0032] Here, the packing tape 7 being cut in the width direction means that the tearing progresses in the vertical direction in Fig. 2(a), resulting in the packing tape 7 being cut and divided in the left-right direction. The packing tape 7 being cut in the length direction means that the tearing progresses in the left-right direction in Fig. 2(a), resulting in the packing tape 7 being cut and divided in the up-down direction.

[0033] 1, the packing tape 7 is in the form of a strip having a long overall length in the longitudinal direction. Therefore, the packing tape 7 is provided in a state where it is wound around the outer periphery of a cylindrical core material S, that is, in a roll state. The packaging tape 7 is wound with one surface 81 (see FIG. 2(b)) having an adhesive layer 85 facing inward and the other surface 82 having a release layer facing outward. In the wound packaging tape 7, the adhesive layer 85 is in contact with the adjacent release layer on the inner diameter side. Therefore, when the packing tape 7 is wound in a roll, the packing tape 7 can be pulled out in the longitudinal direction from the portion wound in the roll by pinching and pulling the end located at the outermost periphery.

[0034] Fig. 3 is a diagram illustrating the packing tape 7. Fig. 3(a) is a diagram illustrating the process of sealing the cardboard box 100 using the packing tape 7. Fig. 3(b) is a diagram illustrating the process of separating the portion of the packing tape 7 that has been attached to the cardboard box 100 from the roll portion. In Figures 3(a) and 3(b), the core tape 9 is cross-hatched to make it easier to understand the position of the core tape 9. Also, Figure 3(b) shows a schematic representation of the size and spacing of each breakage guide line.

[0035] 3(a), the opening of the cardboard box 100 (packaging material) is sealed by closing a pair of outer flaps 102, 102. The outer flaps 102, 102 in the closed state are fixed with packing tape 7, thereby sealing the cardboard box 100.

[0036] In this case, the worker pulls out the roll of packing tape 7 and arranges it in a direction along the mating surfaces 103 of the outer flaps 102, 102.

[0037] Next, one end 7a on the downstream side of the packing tape 7 is attached to the side surface 101 of the cardboard box 100, and then the base tape 8 of the packing tape 7 is attached so as to straddle the outer flaps 102, 102. The core tape 9 is positioned so as to overlap the mating surface 103 of the outer flaps 102, 102. The packing tape 7 is attached over the entire length of the mating surface 103. In this way, the cardboard box 100 is sealed.

[0038] Here, the worker cuts off the packing tape 7 that has been pulled out by a predetermined length from the portion wound in the roll. The packing tape 7 has a third break guiding wire 3 and a fourth break guiding wire 4 formed along the width direction at one end 83 and the other end 84 of the base tape 8. Therefore, when an operator twists off the packing tape 7 by hand, an external force is applied in the width direction from one end 83 or the other end 84 of the base tape 8. This causes the base tape 8 to break along the third break guiding wire 3 or the fourth break guiding wire 4, and the break progresses in the width direction.

[0039] For example, when an external force is applied from one end 83 of the base tape 8 in the width direction (the direction of the outline arrow in FIG. 3(b)), a break is induced from either the third break induction wire 3 or the fourth break induction wire 4, whichever is closer to the point of application of the external force. The break is induced by the third break induction wire 3 or the fourth break induction wire 4, and progresses through region Rb in the width direction toward the core tape 9.

[0040] Furthermore, the first fracture induction wire 1 is formed in the region Ra. The first fracture induction wire 1 has second slits 12 and third slits 13 each having a width direction component. Therefore, the first fracture induction wire 1 also makes it easier for fracture to progress in the width direction in the region Ra.

[0041] Therefore, the break that reaches region Ra from region Rb is guided by the second slit 12 and the third slit 13 of the first break induction wire 1, and progresses widthwise within region Ra, eventually reaching the other end 84 of the base tape 8. As a result, the packing tape 7 that has been pulled out by the predetermined length is cut off from the portion wound in a roll around the core material S. This allows the packing tape 7 that has been wound in a roll around the core material S to be pulled out by the predetermined length and attached to the cardboard box 100 (see FIGS. 4 and 6).

[0042] If the third break guiding wire 3 and the fourth break guiding wire 4 are formed in positions where they overlap when viewed in at least one of the longitudinal and width directions, the strength of one end 83 and the other end 84 of the base tape 8 will be reduced. As a result, when the packaging tape 7 is pulled out from the portion wound in a roll, it may be cut during pulling. Furthermore, it is possible that the packaging tape 7 attached to the cardboard box 100 may be cut, for example, by impact during transportation.

[0043] Therefore, in this embodiment, the third break induction wire 3 and the fourth break induction wire 4 are formed at positions offset from each other when viewed in the longitudinal direction and the width direction, thereby maintaining the strength of the base tape 8. This reduces the risk of the packaging tape 7 being cut while being pulled out from the rolled portion, and also reduces the risk of the tape being cut due to impact during transportation.

[0044] In this embodiment, the third break induction wires 3 and the fourth break induction wires 4 are arranged alternately in the longitudinal direction when viewed from the width direction of the packing tape 7. This allows the distance between adjacent break induction wires in the longitudinal direction (the distance Dx between the third break induction wire 3 and the fourth break induction wire 4 (see FIG. 2(a))) to be reduced. This makes it easier to induce breakage of the packing tape 7 when the packing tape 7 is pulled out from the roll and cut.

[0045] (Example 1: I paste) 4 and 5 are diagrams illustrating a first example of use of the packing tape 7. FIG. Fig. 4(a) is a diagram showing a cardboard box 100 sealed by applying packing tape 7 in an I-shaped manner. Fig. 4(b) is a diagram showing area A in Fig. 4(a) as viewed from the thickness direction of the packing tape 7. Fig. 5(a) is a diagram illustrating the breaking of the packing tape 7 applied to the cardboard box 100. Fig. 5(b) is a schematic diagram of the AA cross section of Fig. 5(a). Fig. 5(c) is a diagram of area B of Fig. 5(a) viewed from the thickness direction of the packing tape 7. 4 and 5, the core tape 9 is cross-hatched to make it easier to understand the position of the core tape 9. Also, in FIGS. 4 and 5, the size and spacing of each breakage guide line are shown schematically to make it easier to understand the positional relationship.

[0046] As shown in (a) of Figure 4, a cardboard box 100 may be sealed by applying packing tape 7 along the mating surfaces 103 of the outer flaps 102, 102 (I-type sealing). In I-type sealing, the core tape 9 is arranged so as to overlap the mating surfaces 103 over the entire length in the longitudinal direction.

[0047] As shown in Fig. 2(b), the core tape 9 does not have an adhesive layer and is therefore not directly adhered to the cardboard box 100. Therefore, as shown in Fig. 4(b), the packing tape 7 attached to the cardboard box 100 is such that the region Ra where the core tape 9 is provided is easily separated from the cardboard box 100.

[0048] For example, an operator can grasp the core tape 9 at one end 7a of the packing tape 7 in the longitudinal direction and peel the core tape 9 longitudinally from the cardboard box 100 (see (a) of FIG. 5). By peeling the core tape 9, the base tape 8 breaks along the longitudinal direction, and eventually the base tape 8 is cut into one side and the other side in the width direction.

[0049] When peeling off the core tape 9, it is difficult to apply a tensile force to the core tape 9 in the longitudinal direction over the entire length of the packaging tape 7. For example, if the direction of the tensile force acting on the core tape 9 is inclined relative to the longitudinal direction, the direction of breakage may shift.

[0050] If the direction of fracture deviates from the longitudinal direction, for example, resistance during peeling may increase, causing the tape to get caught along the way, or the core tape 9 may be cut, hindering smooth peeling. Therefore, in this embodiment, the first breakage guide wire 1 and the second breakage guide wire 2 are formed on the packing tape 7, so that the direction in which the breakage progresses can be controlled.

[0051] When the core tape 9 is peeled off from the packaging tape 7, the base tape 8 is induced to break by the first break induction wire 1 and the second break induction wire 2 in response to the peeling of the core tape 9. When the core tape 9 is peeled off from the one end 7a of the packing tape 7, the first break induction wire 1 or the second break induction wire 2, whichever is closer to the one end 7a, is induced to break. For example, in the example shown in FIG. 4(b), the second break induction wire 2 is located closer to the one end 7a of the packing tape 7 than the first break induction wire 1. Therefore, when the core tape 9 is peeled off, a break is induced from the second break induction wire 2.

[0052] Here, the interval CL2 between the second breaking induction lines 2, 2 adjacent in the longitudinal direction is set narrower than the interval CL1 between the first breaking induction lines 1, 1 adjacent in the longitudinal direction (CL2 < CL1, see (a) of FIG. 2). Therefore, when comparing the region where the first breaking induction line 1 is formed with the region where the second breaking induction line 2 is formed, the strength of the region where the second breaking induction line 2 is formed is lower. Thus, the breakage of the base tape 8 accompanying the peeling of the core tape 9 is likely to proceed along the second breaking induction line 2.

[0053] However, as described above, the direction of the tensile force acting on the core tape 9 may be inclined with respect to the longitudinal direction (the directions of the white arrows a1, a2 in (b) of FIG. 5). Then, in the second breaking induction lines 2, 2 located on both sides of the core tape 9, the breaking progress direction on at least one side (for example, the right region of the intermediate line Xc in the figure) deviates from the straight line Lx2 direction and heads toward the core tape 9 side (the direction of the white arrow a1 in the figure). In this case, a force in the direction of torsional shear acts on the core tape 9 in the width direction.

[0054] In the present embodiment, in the core tape 9 (region Ra), the first breaking induction line 1 is formed at a position adjacent to the second breaking induction line 2 in the width direction. The second slit 12 and the third slit 13 in the first breaking induction line 1 are inclined in a direction in which the separation distance L1 between them increases as they approach the second breaking induction line 2 (see (a) of FIG. 2).

[0055] Thereby, the breakage that deviates from the straight line Lx2 direction and heads toward the core tape 9 side is induced by the second slit 12 of the first breaking induction line 1. The breakage induced by the second slit 12 is changed in a direction away from the core tape 9 when viewed from the intermediate line Xc by passing through the first slit 11 and the third slit 13. The breakage that proceeds away from the core tape 9 along the third slit 13 reaches the second breaking induction line 2 (the black arrow direction in the figure) and then proceeds in the straight line Lx2 direction again.

[0056] In this way, in this embodiment, by having the first break induction wire 1 and the second break induction wire 2, even if the direction of the tensile force of the core tape 9 is inclined relative to the longitudinal direction, the break is controlled to progress in the longitudinal direction between the straight line Lx1 and the straight line Lx2. This reduces the risk of the core tape 9 getting caught or being cut when peeled off, which may occur when the direction of the pulling force on the core tape 9 is inclined relative to the longitudinal direction, and allows for smooth peeling.

[0057] Furthermore, the breakage of the second breakage induction wire 2 on the other side of the core material tape 9 (the area to the left of the midpoint line Xc in the figure) deviates from the direction of the straight line Lx2 and attempts to proceed in a direction away from the core material tape 9 (the direction of the white arrow a2 in the figure). However, the area on the opposite side of the core tape 9 from the line Lx2 is strongly adhered to the cardboard box 100 by the adhesive layer 85 (see (b) of Figure 2), and is therefore less likely to break. Therefore, breakage is less likely to progress in a direction away from the core tape 9 from the line Lx2. In this case, even if the direction of the tensile force on the core tape 9 is inclined relative to the longitudinal direction, breakage will progress in the direction of the line Lx2 along the second breakage guiding line 2, which is more likely to break.

[0058] As shown in FIG. 5(a), when the core tape 9 has been completely peeled off, the mating surfaces 103 of the outer flaps 102, 102 of the cardboard box 100 are exposed. Here, after the core tape 9 is peeled off, the two base tapes 8, 8 divided in the width direction are provided straddling the outer flaps 102, 102 on one side and the other side of the mating surface 103, and the side surface 101. The mating surfaces 104, 104 between the outer flaps 102, 102 and the side surface 101 are provided in a direction along the width direction of the base tape 8.

[0059] As shown in Fig. 5(c), the two base tapes 8, 8 separated in the width direction have fracture surfaces 86, 87 along the straight line Lx2. The fracture surfaces 86, 87 are formed by fracture along the second fracture guide lines 2, 2 (see Fig. 5(b)). The base tapes 8, 8 are provided with fifth fracture induction wires 5, 5 at positions adjacent to the fracture surfaces 86, 87 in the width direction, respectively. The fifth fracture induction wire 5 is provided in a direction along the width direction.

[0060] As shown in Figure 5(c), an operator can peel the base tapes 8, 8 from the fracture surfaces 86, 87 toward one end 83 and the other end 84. In this case, the fracture that starts from the fracture surfaces 86, 87 is guided in the width direction along the fifth fracture guide lines 5, 5, making it easier to reach the one end 83 and the other end 84, respectively. As a result, the base tapes 8, 8 are cut into one side and the other side in the longitudinal direction.

[0061] The base tapes 8, 8 may be peeled from one end 83 and the other end 84 in the width direction toward the fracture surfaces 86, 87. In this case, the fracture that starts from the one end 83 and the other end 84 is guided in the width direction along the third and fourth fracture guide lines 3, 4, making it easier to reach the fracture surfaces 86, 87, respectively.

[0062] As a result, the packaging tape 7 attached to the cardboard box 100 is released from its fixing to the mating surfaces 103, 104. Therefore, the cardboard box 100 can be easily opened without using a blade or the like.

[0063] The fifth break induction wire 5 may be placed on the straight line Ly2 passing through the fourth break induction wire 4, but it is preferable from the standpoint of ensuring strength to place it on the straight line Ly1 passing through the third break induction wire 3, as this allows for a wider gap in the width direction between the third break induction wire 3 and the fifth break induction wire 5.

[0064] (Example 2: H-type pasting) 6, 7, and 8 are diagrams illustrating a second example of use of the packing tape 7. FIG. 6 to 8, the core tape 9 is cross-hatched to make it easier to understand the position of the core tape 9. Also, in Fig. 6 to Fig. 8, the size and spacing of each breakage guide line are shown schematically. Fig. 6(a) is a diagram illustrating a cardboard box 100 to which packing tape 7 has been applied in an H-shape. Fig. 6(b) is a diagram of area A in Fig. 6(a) viewed from the thickness direction of the packing tape 7. Fig. 7(a) is an enlarged view of region B in Fig. 6(b). Fig. 7(b) is an enlarged view of region A in Fig. 7(a). Fig. 7(c) is an enlarged view of region B in Fig. 7(a). In addition, in (a) to (c) of FIG. 7, the areas where the lower core tape 9L and the areas Ra and Rb of the upper packing tape 7U overlap are hatched with different pitches. Fig. 8(a) is a diagram illustrating the breaking of the packing tape 7 attached in an H-shaped manner to the cardboard box 100. Fig. 8(b) is a diagram of area A in Fig. 8(a) viewed from the thickness direction of the packing tape 7. 8(b) shows a cross section of the peeled packing tape along the thickness direction, and the fracture surfaces of the upper packing tape 7U and the lower packing tape 7L are shown in simplified form.

[0065] As shown in (a) of Figure 6, in order to improve the sealing performance of, for example, a cardboard box 100, the packing tape 7 may be applied along the mating surface 103 and then further applied along the mating surface 104 (H application). In H application, the core tape 9 is positioned so that it overlaps the mating surfaces 103 and 104.

[0066] In H-type pasting, the packing tape 7 along the mating surface 103 and the packing tape 7 along the mating surface 104 are pasted so as to intersect. At the intersection of these two packing tapes 7, 7, the packing tape 7 along the mating surface 103 is located below the packing tape 7 along the mating surface 104. In the following explanation, of the two intersecting packaging tapes 7, 7, the packaging tape 7 located on the lower side will be referred to as 7L. The reference numerals of the parts related to the packaging tape 7L will also be prefixed with L. The packaging tape 7 located on the upper side will be referred to as 7U. The reference numerals of the parts related to the packaging tape 7U will also be prefixed with U.

[0067] In (b) of Figure 6, the other widthwise ends 84U, 94U of the base tape 8U and core tape 9U of the packaging tape 7U are attached facing downward in the figure, but of course one widthwise end 83U, 93U may also be attached facing downward in the figure.

[0068] As shown in (a) of Figure 7, in the H-type pasting, the core tape 9L is formed with overlapping areas 9Lb, 9Lb that overlap the areas RbU, RbU of the packaging tape 7U in the longitudinal direction, and an overlapping area 9La that overlaps the area RaU (the hatched areas in the figure).

[0069] The overlapping regions 9Lb, 9Lb of the core tape 9L are thicker by the amount of overlap of the base tape 8U. The overlapping region 9La of the core tape 9L is further thicker by the amount of overlap of the base tape 8U and the core tape 9U (see FIG. 8(b)).

[0070] For example, when opening a cardboard box 100 with H-shaped packing tape 7, one possible opening method is to peel off the core tape 9L and cut the packing tape 7U in the longitudinal direction. However, when the packing tape 7 is H-shaped, the strength of the area where the packing tape 7 overlaps multiple times in the thickness direction increases. Therefore, peeling is more likely to be hindered than when opening a cardboard box 100 with I-shaped packing tape 7. In the area where the packing tapes 7U and 7L do not overlap, the core tape 9L breaks when it is peeled off from the packing tape 7L in the same way as in the I-type tape, and therefore a description thereof will be omitted.

[0071] 6(b), when the packing tape 7L is attached in the H-type manner, the longitudinal direction of the packing tape 7L and the width direction of the packing tape 7U are substantially aligned (the vertical direction in the figure). Therefore, when the core tape 9L is peeled off along the longitudinal direction from one end 7a of the packing tape 7L (the white arrow in the figure), the core tape 9L comes into contact with the other end 84U of the base tape 8U in the width direction.

[0072] 7(a), when the core tape 9L comes into contact with the other end 84U of the base tape 8U, the pulling force involved in peeling it off is concentrated at the intersections P1, P1 of both ends in the width direction (left-right direction in the figure) of the core tape 9L and the other end 84U in the width direction (up-down direction in the figure) of the base tape 8U. This pulling force acts in the longitudinal direction (up-down direction in the figure) of the core tape 9L, and acts on the base tape 8U in the width direction of the base tape 8U.

[0073] 7(a), in the longitudinal direction of the core tape 9L, the area from intersections P1, P1 toward the overlapping area 9Lb (upper side in the figure) is thicker and stronger by the amount that the base tape 8U overlaps the core tape 9L. Therefore, in the overlapping area 9Lb of the core tape 9L, resistance from the base tape 8U can cause the core tape 9L to get caught or be easily cut when peeled off. In the following description, an example of a breakage starting from an intersection P1 (on the right side in the drawing) on ​​one side in the width direction of the core tape 9L will be described.

[0074] In this embodiment, as shown in (b) of Figure 6, by applying H-type bonding, the straight lines Ly1 and Ly2 passing through the third and fourth break guide lines 3U and 4U of the packing tape 7U are aligned with the straight lines Lx1 and Lx2 passing through the first and second break guide lines 1L and 2L of the packing tape 7L.

[0075] 7(b), the tensile force concentrated at the intersection P1 causes the base tape 8U to break between the intersection P1 and the third break induction line 3U, which is an area of ​​relatively low strength (arrow a1). The break that reaches the third break induction line 3U passes through the third break induction line 3U, making it easier for the break to progress in the width direction (up and down direction in the drawing) of the base tape 8U.

[0076] When the peeling position of the core tape 9L exceeds the third break guiding line 3U (upper side in the figure), the base tape 8U is broken between the third break guiding line 3U and the step D (arrow b1) following the peeling of the core tape 9L. The step D is a step formed at the boundary between the packaging tape 7U and the core tape 9L.

[0077] The step D between the base tape 8U and the core tape 9L is oriented along a straight line Ly3, which is a straight line that extends in the width direction of the base tape 8U. The breakage that reaches the step D from the third break induction wire 3U progresses along the step D in the width direction of the base tape 8U (arrow c).

[0078] If the fourth break induction line 4U is closer to the intersection P1 than the third break induction line 3U, the strength between the intersection P1 and the fourth break induction line 4U is reduced. Therefore, the tensile force concentrated at the intersection P1 causes a break between the intersection P1 and the fourth break induction line 4U (arrow a2). The break that reaches the fourth break induction line 4U passes through the fourth break induction line 4U, which makes it easier for the break to progress in the width direction (up and down in the figure) of the base tape 8U.

[0079] Then, when the peeling position of the core material tape 9L exceeds the fourth breakage guiding line 4U (upper side in the figure), the base material tape 8U is broken between the fourth breakage guiding line 4U and the step portion D between the base material tape 8U and the core material tape 9L, following the peeling of the core material tape 9L (arrow b2). The breakage that reaches the step D from the fourth break induction wire 4U progresses along the step D in the width direction of the base tape 8U (arrow c).

[0080] In this way, when a pulling force is applied to the base tape 8U from the core tape 9L, the third breakage guiding wire 3U and the fourth breakage guiding wire 4U induce breakage in the base tape 8U. This makes it difficult for the core tape 9L to be hindered from peeling off even in the overlapping region 9Lb, which has increased strength.

[0081] Here, the third break guiding wire 3U and the fourth break guiding wire 4U are formed at positions offset from each other when viewed in the longitudinal and width directions of the packing tape 7U. Therefore, the strength of the base tape 8U can be maintained better than when, for example, the third break guiding wire 3U and the fourth break guiding wire 4U are formed at positions overlapping when viewed in at least one of the longitudinal and width directions. As a result, the base tape 8U attached to the cardboard box 100 is less likely to break due to impacts, for example, during transportation, but will break if an external force greater than the impact during transportation, such as a tensile force acting from the core tape 9L, is applied to it.

[0082] The third breakage guide wires 3U and the fourth breakage guide wires 4U are arranged alternately in the longitudinal direction when viewed in the width direction of the packing tape 7U. This allows the distance Dx (see (a) of Figure 2) between the third break induction wire 3U and the fourth break induction wire 4U, which are adjacent in the longitudinal direction, to be reduced, making it easier to induce breakage when a tensile force is applied from the core tape 9L.

[0083] As shown in FIG. 7(c), when the overlapping region 9Lb of the core tape 9L is peeled off to allow the breakage of the base tape 8U to progress (arrow c), it comes into contact with the other end 94U in the width direction of the core tape 9U.

[0084] 7(a), when the core tape 9L comes into contact with the other end 94U of the core tape 9U, the pulling force involved in the peeling is concentrated at the intersections P2, P2 between the core tape 9L and the other end 94U of the core tape 9U. This pulling force acts on the core tape 9U in the width direction of the core tape 9U.

[0085] In the longitudinal direction of the core tape 9L, the area from intersections P2, P2 to the overlapping area 9La (upper side in the figure) is thicker by the amount that the base tape 8U and core tape 9U overlap the core tape 9L, thereby increasing its strength. Therefore, even in the overlapping area 9La of the core tape 9L, the resistance from the base tape 8U and core tape 9U can cause snagging when peeled off, making the core tape 9L more likely to be cut.

[0086] In this embodiment, as shown in (b) of Figure 6, by applying H-type pasting, the second slit 12U and the third slit 13U of the first break induction line 1U in the packing tape 7U, which are arranged in the direction along the straight lines Lp and Lq, have components oriented in the direction along the straight lines Lx1 and Lx2 passing through the first and second break induction lines 1L and 2L of the packing tape 7L.

[0087] As a result, as shown in FIG. 7(c), when a tensile force is concentrated at the intersection P2 at the other end 94U of the core tape 9U, the area with relatively low strength between the intersection P2 and the third slit 13U is broken (arrow d).

[0088] The breakage that reaches the third slit 13U propagates along the third slit 13U in the width direction of the core tape 9U. The breakage then starts at the intersection 15U between the third slit 13U and the first slit 11U and propagates in the direction of a straight line Ly4 (arrow e). The straight line Ly4 is a straight line that runs along the width direction of the core tape 9U.

[0089] The fracture progressing along the straight line Ly4 reaches the intersection 15U' of the first fracture induction line 1U' located on the opposite side (upper side in the drawing) across the middle line Xc in the width direction of the core tape 9U. The breakage that reaches the intersection 15U' advances widthwise through the core tape 9U along the third slit 13U'.

[0090] When the peeling position of the core material tape 9L exceeds the first breakage guide line 1U' (upper side in the figure), the core material tape 9L is peeled and the area between the third slit 13U' and the step portion D is broken (arrow f).

[0091] The break that reaches the step D from the first break guide wire 1U' advances along the step D in the width direction of the base tape 8U (arrow g) and finally reaches one end 83U of the base tape 8U (see FIGS. 7(a) and 8(b)). As a result, the packing tape 7U is cut in the longitudinal direction by the core tape 9L.

[0092] In this manner, in the present embodiment, even when the packing tapes 7L and 7U are H-attached, peeling off the core tape 9L of the packing tape 7L encourages the packing tape 7U to break from the first break guiding wire 1U, the third break guiding wire 3U, and the fourth break guiding wire 4U (see FIG. 8(b)). Therefore, when opening a cardboard box 100 to which the packing tape 7 is H-attached, even if the core tape 9L is peeled off first, the packing tape 7U is less likely to interfere with the peeling.

[0093] Here, as shown in FIG. 8(a), in the case of H-type pasting, a packing tape 7U' is also provided on the other end 7b side of the packing tape 7L in the longitudinal direction. The core tape 9L peeled off from one end 7a comes into contact with the packing tape 7U' at the other end 7b. Although not shown, the packing tape 7U' also has first breakage guide wire 1U, third breakage guide wire 3U, and fourth breakage guide wire 4U formed along the width direction, so that peeling off the core tape 9L of the packing tape 7L promotes breakage.

[0094] Therefore, by peeling the core tape 9L over the entire length from one end 7a to the other end 7b, the packing tapes 7U and 7U' attached to the one end 7a and the other end 7b can be cut in a single peeling motion. Note that even if multiple packing tapes 7U (not shown) are attached between the one end 7a and the other end 7b of the core tape 9L in the longitudinal direction to improve sealing performance, all of the packing tapes 7U can be cut in a single peeling motion.

[0095] As shown in FIG. 8(b), after the core tape 9L is peeled off, the mating surfaces 104, 104 of the cardboard box 100 are covered with the remaining base tapes 8L, 8U and core tape 9U.

[0096] After the core tape 9L is peeled off, fracture surfaces 96U and 97U are formed on the packaging tape 7U along the width direction of the packaging tape 7U. The fracture surfaces 96U and 97U face each other with a gap in between in the longitudinal direction of the packaging tape 7U. Between the fracture surfaces 96U and 97U, mating surfaces 103 and 104 of the cardboard box 100 are exposed.

[0097] The packing tape 7U is provided with the core tape 9U oriented along the mating surface 104. An operator can tear the base tape 8U by pinching the fracture surfaces 96U and 97U and peeling the core tapes 9U, 9U away from each other. The tearing method in this case is the same as in the I-type tape (see FIG. 5(b)).

[0098] Here, the base tapes 8L have fifth fracture guiding wires 5L, 5L provided at positions adjacent to the fracture surfaces 86L, ​​87L in the width direction of the base tapes 8L, 8L, respectively. In the H-attached state, the straight line Ly1 passing through the fifth fracture guiding wires 5L, 5L is aligned with the straight lines Lx1, Lx2 passing through the first and second fracture guiding wires 1U, 2U.

[0099] A plurality of fifth break induction wires 5L are provided over the entire length of the base tapes 8L, 8L in the longitudinal direction. Therefore, the fifth break induction wires 5L are located in the regions of the base tapes 8L, 8L where the core tapes 9U, 9U overlap.

[0100] Therefore, when the fracture surfaces 96U, 97U are pinched and the core tapes 9U, 9U are peeled away from each other, the fracture surfaces 86L, ​​87L of the base tape 8L can also be pinched and peeled away in the area where the core tapes 9U, 9U overlap. As a result, as the core tapes 9U, 9U are peeled away, the base tapes 8L, 8L are encouraged to break in the direction along the fifth fracture guide lines 5L, 5L. This allows the mating surfaces 104, 104 to be opened.

[0101] As described above, the packing tape 7 according to this embodiment has the following configuration. (1) Packing tape 7 A base tape 8 (first belt-shaped member), and a core tape 9 (second belt-shaped member) provided on one surface 81 of the base tape 8 in the thickness direction. The core tape 9 is provided along the longitudinal direction of the base tape 8 between one end 83 and the other end 84 in the width direction of the base tape 8. In the region Ra (first region) where the base tape 8 and the core tape 9 overlap, a first breakage induction wire 1 is formed. In a region Rb (second region) where the base tape 8 and the core tape 9 do not overlap, a second breakage induction wire 2 and a third breakage induction wire 3 are formed. The first breakage induction wire 1 and the second breakage induction wire 2 are provided in a direction along the longitudinal direction. The third breakage induction wire 3 is provided in a direction along the width direction. In the width direction, the second break induction wire 2 is provided closer to the first break induction wire 1 than the third break induction wire 3. In the first break induction wire 1, the second slit 12 and the third slit 13 located at both ends in the longitudinal direction are located closer to the second break induction wire 2 than the first slit 11 located in the center. The second slit 12 and the third slit 13 are inclined in a direction such that the separation distance L1 in the longitudinal direction increases as they approach the second breakage induction wire 2. The first break induction wire 1, the second break induction wire 2, and the third break induction wire 3 are each provided in plurality at intervals over the entire length in the longitudinal direction.

[0102] For example, if the peeling direction of the core tape 9 is inclined relative to the longitudinal direction, the direction in which the breakage of the base tape 8 progresses may deviate from the longitudinal direction. If the direction of the breakage deviates, resistance during peeling increases, causing the tape to get stuck midway or the core tape 9 to break, which may prevent smooth peeling. Therefore, by configuring as described above, even if the direction of breakage in the applied packing tape 7 deviates from the longitudinal direction, the direction is corrected by passing through the first breakage guide wire 1. As a result, the breakage can be controlled to progress in the longitudinal direction between the first breakage guide wire 1 and the second breakage guide wire 2 in the width direction. Furthermore, with the above-described configuration, when the core tape 9L of the packing tape 7L is peeled off from the H-attached packing tapes 7L and 7U, the base tape 8U of the packing tape 7U is induced to break by the third break guiding line 3U located near the intersection P1 with the core tape 9L (arrow a1 in FIG. 7B). Also, the core tape 9U of the packing tape 7U is induced to break by the second slit 12 or the third slit 13 of the first break guiding line 1U located near the intersection P2 with the core tape 9L (arrow d in FIG. 7C). This allows the direction of breakage to be controlled so that even if the core tape 9L is peeled off first in the H-attached packaging tapes 7L and 7U, the peeling is not hindered by the packaging tape 7U.

[0103] (3) In the region Rb (second region) where the base tape 8 and the core tape 9 do not overlap, a fourth breakage induction wire 4 is further formed along the width direction. The fourth break induction wire 4 is provided between the second break induction wire 2 and the third break induction wire 3 in the width direction. The third break induction wire 3 and the fourth break induction wire 4 are provided on one end 83 side and the other end 84 side of the base tape 8 in the width direction. The third break induction wire 3 and the fourth break induction wire 4 are provided at positions offset from each other in the longitudinal direction and the width direction.

[0104] For example, if the third break induction wire 3 and the fourth break induction wire 4 are formed in positions where they overlap when viewed in at least one of the longitudinal and width directions, the strength of one end 83 and the other end 84 of the base tape 8 will be reduced. As a result, when the packaging tape 7 is pulled out from the portion wound in a roll, it may be cut during pulling. Also, the packaging tape 7 attached to the cardboard box 100 may be cut, for example, by impact during transportation. Therefore, by configuring as described above, the strength of the base tape 8 can be maintained, which reduces the risk of the packaging tape 7 being cut while being pulled out from the rolled portion. Also, it reduces the risk of the packaging tape 7 being cut due to impact during transportation, etc. Furthermore, the H-attached packaging tapes 7L and 7U can be broken when subjected to an external force greater than the impact during transportation, such as a pulling force acting from the core tape 9L.

[0105] (4) When viewed from the width direction, the third break induction wires 3 and the fourth break induction wires 4 are arranged alternately in the longitudinal direction.

[0106] With this configuration, the distance between adjacent break induction wires in the longitudinal direction (the distance Dx between the third break induction wire 3 and the fourth break induction wire 4 (see FIG. 2(a))) can be reduced. Therefore, when the packing tape 7 is pulled out from the portion where it is wound in a roll and cut, it is easy to induce breakage of the packing tape 7. Furthermore, when a pulling force is applied from the core tape 9L to the H-attached packing tapes 7L and 7U, it is easy to induce breakage of the packing tape 7U.

[0107] (5) In the region Rb (second region) where the base tape 8 and the core tape 9 do not overlap, a fifth breakage induction wire 5 is further formed along the width direction. The fifth break induction wire 5 is provided between the second break induction wire 2 and the fourth break induction wire 4 in the width direction. In the width direction, the distance Dy3 between the fifth break induction wire 5 and the second break induction wire 2 is narrower than the distance Dy2 between the fifth break induction wire 5 and the fourth break induction wire 4.

[0108] When the core tape 9 is peeled off, two base tapes 8, 8 separated in the width direction remain on the cardboard box 100. Therefore, when opening the cardboard box 100, it may be necessary to cut the base tape 8 remaining on the cardboard box 100. Therefore, by configuring as described above and forming the fifth break induction wire 5 on the side of the second break induction wire 2 in the region Rb in the width direction, the base tapes 8, 8 remaining on the cardboard box 100 are induced to break from the sides of the fracture surfaces 86, 87. This makes it possible to easily cut the base tape 8 remaining on the cardboard box 100.

[0109] (6) The fifth break induction wire 5 is provided on a straight line Ly1 passing through the third break induction wire 3 in the width direction.

[0110] With this configuration, the fifth break guide wire 5 is provided at a position farthest from the third and fourth break guide wires 3 and 4 in the width direction, so that the strength of the packing tape 7 is less likely to decrease.

[0111] (Variation 1) FIG. 9 is a diagram illustrating a packing tape 7A according to the first modification. In this embodiment, the shape of the first break induction wire 1 is exemplified as being composed of three straight lines (first slit 11, second slit 12, and third slit 13), but is not limited to this. For example, as shown in Fig. 9, the shape of the first break induction wire 1A may be an arc that opens toward the second break induction wire 2 in the width direction.

[0112] This also makes it possible to control the direction of tearing when the packaging tape 7A attached in an I or H shape to the cardboard box 100 is opened.

[0113] (Variation 2) In the above-described embodiment and modified example 1, the packaging tapes 7 and 7A are configured from the base tape 8 and the core tape 9, but the present invention is not limited to this. For example, a packaging tape 7B that does not include the core tape 9 may be used.

[0114] Fig. 10 is a diagram illustrating a packing tape 7B according to Modification 2. Fig. 10(a) is a diagram of the packing tape 7B as viewed from the thickness direction. Fig. 10(b) is a schematic diagram of the AA cross section of Fig. 10(a). Fig. 11 is a diagram illustrating an example of use of the packing tape 7B according to Modification 2. Fig. 11(a) is a diagram illustrating the breaking of the packing tape 7B that has been applied in an I-type manner. Fig. 11(b) is a diagram illustrating the breaking of the packing tape 7B that has been applied in an H-type manner. 10 and 11, the non-adhesive portion 89 is cross-hatched to make it easier to understand the position of the non-adhesive portion 89. In the following description, the same components as those in the embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0115] As shown in FIG. 10(b), a packing tape 7B according to the second modification is made up of only a base tape 8A (strip-shaped member). The base tape 8A has a strip-shaped base 80 and an adhesive layer 85A (adhesive portion) provided on one surface 81 of the base 80 in the thickness direction. The adhesive layer 85A is provided on one end 83 side and the other end 84 side of the base 80 in the width direction. The adhesive layer 85A on the one end 83 side and the adhesive layer 85A on the other end 84 side are provided with an interval between them in the width direction (left-right direction in the figure) of the base tape 8A.

[0116] In the region between the adhesive layers 85A, 85A in the width direction, one surface 81 of the base 80 is exposed. The region between the adhesive layers 85A, 85A in the width direction is a non-adhesive portion 89 that does not have adhesiveness. The adhesive layers 85A, 85A and the non-adhesive portion 89 are provided over the entire length of the base tape 8A in the longitudinal direction. Note that the non-adhesive portion 89 may be provided with a layer of a release agent (release layer) whose main component is silicone or the like.

[0117] 10(a), when viewed in the thickness direction of the base tape 8A (front-to-back direction on the paper in the figure), the midline of the non-adhesive portion 89 in the width direction coincides with the midline Xc of the base tape 8A. The width W89 of the non-adhesive portion 89 in the width direction is set to a width that approximately matches the width W9 of the core tape 9 (see FIG. 1) (W89 ≒ W9).

[0118] 10(a) and 10(b), the packaging tape 7B is divided into a region Rc having a non-adhesive portion 89 and a region Rd having an adhesive layer 85A in the base tape 8A. In the width direction, the regions Rd are provided on one side and the other side of the region Rc. In the packing tape 7B according to the second modification, the region Rc where the non-adhesive portion 89 is provided (the region where the adhesive layer 85A is not provided) constitutes the first region, and the region Rd where the adhesive layer 85A is provided constitutes the second region.

[0119] As shown in (a) of Figure 10, in the packing tape 7B, when viewed in the thickness direction, the first break induction wire 1 is provided in the region Rc, and the second break induction wire 2 to the fifth break induction wire 5 are provided in the region Rd.

[0120] 10(b), in region Rc, the first breakage induction wire 1 penetrates the base 80 in the thickness direction. In region Rd, the second breakage induction wire 2 to the fifth breakage induction wire 5 penetrate both the base 80 and the adhesive layer 85A in the thickness direction. In addition, the shape and positional relationship of the first break guide wire 1 to the fifth break guide wire 5 in the packaging tape 7B when viewed from the thickness direction are similar to those of the first break guide wire 1 to the fifth break guide wire 5 of the packaging tape 7 according to the embodiment (see (a) of Figure 2), and therefore detailed explanations are omitted.

[0121] The non-adhesive portion 89 of the packing tape 7B does not have the adhesive layer 85A and is therefore not directly adhered to the cardboard box 100. Therefore, when the packing tape 7B is attached to the cardboard box 100, the non-adhesive portion 89 easily separates from the cardboard box 100. Therefore, the non-adhesive portion 89 can be picked up at the end of the packing tape 7B in the longitudinal direction and pulled off from the cardboard box 100 in the longitudinal direction.

[0122] As shown in FIG. 11(a), when opening a cardboard box 100 to which a packing tape 7B is attached, the non-adhesive portion 89 is pulled and peeled in the longitudinal direction (white arrow in the figure). Similar to the packing tape 7 according to the embodiment, the base tape 8A breaks longitudinally between the straight lines Lx1 and Lx2 along the first break guiding wire 1 and the second break guiding wire 2. As a result, the packing tape 7B is finally cut to one side and the other side in the width direction.

[0123] As shown in FIG. 11(b), when opening a cardboard box 100 with a packing tape 7B attached in an H-shaped manner, the non-adhesive portion 89L of the lower packing tape 7BL is pulled and peeled off in the longitudinal direction (white arrow in the figure). Like the packing tape 7U according to the above embodiment, the break in the upper packing tape 7BU proceeds in the directions of the straight lines Ly1 and Ly2 along the third break guide wire 3U and the fourth break guide wire 4U, and reaches the first break guide wire 1U. The break that reaches the first break guide wire 1U then proceeds further in the directions of the straight lines Ly1 and Ly2 (the up-down direction in the drawing) along the second slit 12U and the third slit 13U. As a result, the upper packing tape 7BU is finally cut to one side and the other in the longitudinal direction (the left-right direction in the drawing).

[0124] In this way, the packaging tape 7B of variant example 2, like the packaging tape 7 of the embodiment described above, can reduce the risk of the non-adhesive portion 89 getting caught when peeled off or the risk of the non-adhesive portion 89 being cut during peeling, thereby achieving smooth peeling. Therefore, the packaging tape 7B according to the second modification can reduce the manufacturing cost by omitting the core tape 9, and can also control the direction in which the breakage progresses.

[0125] Furthermore, unlike the above-described packaging tape 7, the packaging tape 7B does not include a core tape 9. Therefore, the packaging tape 7B has smaller variations in thickness in the thickness direction (the vertical direction in (b) of FIG. 10) than the packaging tape 7. Therefore, when the packaging tape 7B is provided in a roll wound around the outer periphery of the core S (see FIG. 1), unevenness caused by differences in thickness is unlikely to appear on the surface of the packaging tape 7B. This allows the packing tape 7B to be smoothly pulled out when the packing tape 7B wound in a roll is pulled out from the portion where it is wound in a roll.

[0126] The packing tape 7B according to the second modification has the following configuration. (2) Packaging tape 7B is The base tape 8A (strip-shaped member) has an adhesive layer 85A (adhesive portion) provided on one surface 81 in the thickness direction of the base 80. The adhesive layers 85A are provided at intervals on one end 83 side and the other end 84 side in the width direction of the base tape 8A, and are provided along the longitudinal direction of the base tape 8A. Between the adhesive layers 85A, 85A in the width direction, there is a non-adhesive portion 89 that does not have adhesiveness. A first breakage induction wire 1 is formed in the region Rc (first region) where the non-adhesive portion 89 of the base tape 8A is provided. In the regions Rd, Rd (second regions) where the adhesive layers 85A, 85A are provided in the base tape 8A, the second fracture guiding wire 2 and the third fracture guiding wire 3 are formed. The first breakage induction wire 1 and the second breakage induction wire 2 are provided in a direction along the longitudinal direction. The third breakage induction wire 3 is provided in a direction along the width direction. In the width direction, the second break induction wire 2 is provided closer to the first break induction wire 1 than the third break induction wire 3. In the first break induction wire 1, the second slit 12 and the third slit 13 located at both ends in the longitudinal direction are located closer to the second break induction wire 2 than the first slit 11 located in the center. The second slit 12 and the third slit 13 are inclined in a direction such that the separation distance L1 in the longitudinal direction increases as they approach the second breakage induction wire 2. The first break induction wire 1, the second break induction wire 2, and the third break induction wire 3 are each provided in plurality at intervals over the entire length in the longitudinal direction.

[0127] This configuration reduces manufacturing costs and allows for control of the direction of fracture progression.

[0128] As described above, the embodiments and modifications of the present invention have been described. The present invention is not limited to these embodiments and modifications. The above-described embodiments and modifications may be combined in any manner.

[0129] Although the embodiments of the present invention have been described above, the above-described embodiments are merely for the purpose of explaining the present invention and do not limit the scope of the present invention. Appropriate modifications can be made within the scope of the technical concept of the invention. [Explanation of symbols]

[0130] 1: First breakage guide wire 2: Second breakage guide wire 3: Third breakage induction wire 4: Fourth breakage induction wire 5: Fifth breakage induction wire 7, 7A, 7B: Packing tape 8: Base tape (first belt-shaped member) 8A: Base tape (strip-shaped member) 9: Core tape (second strip-shaped member) 11: First slit (center) 12: Second slit (end) 13: Third slit (end) 80: Base 81: One side 85, 85A: Adhesive layer (adhesive part) 89: Non-adhesive part 100: Cardboard box 103:Mating surface 104:Mating surface Lp: straight line Lq: Line Lx1~Lx5: Straight line Ly1~Ly2: Straight line Ra: Area (first area) Rb: area (second area) Rc: Area (1st area) Rd: Area (second area) Xc: Intermediate line

Claims

1. a first strip-shaped member; a second belt-shaped member provided on one surface in the thickness direction of the first belt-shaped member, the second belt-shaped member is provided along the longitudinal direction of the first belt-shaped member between one end and the other end in the width direction of the first belt-shaped member, a first breakage induction wire formed in a first region where the first belt-shaped member and the second belt-shaped member overlap; a second break induction wire and a third break induction wire formed in a second region where the first belt-shaped member and the second belt-shaped member do not overlap, The first breakage guide wire and the second breakage guide wire are provided in a direction along the longitudinal direction, The third breakage guide wire is provided in a direction along the width direction, In the width direction, the second breakage guiding wire is provided closer to the first breakage guiding wire than the third breakage guiding wire, The first breakage guide wire has both end portions in the longitudinal direction located closer to the second breakage guide wire than a central portion, The both end portions are inclined in a direction in which the separation distance in the longitudinal direction increases as the both end portions approach the second breakage guide line, The packing tape is characterized in that the first break guiding wire, the second break guiding wire, and the third break guiding wire are each provided at intervals over the entire length in the longitudinal direction.

2. a strip-shaped member having an adhesive portion on one surface in a thickness direction; the adhesive portions are provided at intervals between one end side and the other end side in the width direction of the belt-shaped member and are provided along the longitudinal direction of the belt-shaped member, a first breakage guide wire formed in a first region of the belt-shaped member where the adhesive portion is not provided; a second breakage guide wire and a third breakage guide wire formed in a second region of the belt-shaped member where the adhesive portion is provided, The first breakage guide wire and the second breakage guide wire are provided in a direction along the longitudinal direction, The third breakage guide wire is provided in a direction along the width direction, In the width direction, the second breakage guiding wire is provided closer to the first breakage guiding wire than the third breakage guiding wire, The first breakage guide wire has both end portions in the longitudinal direction located closer to the second breakage guide wire than a central portion, The both end portions are inclined in a direction in which the separation distance in the longitudinal direction increases as the both end portions approach the second breakage guide line, The packing tape is characterized in that the first break guiding wire, the second break guiding wire, and the third break guiding wire are each provided at intervals over the entire length in the longitudinal direction.

3. In claim 1 or claim 2, A fourth breakage guide line is further formed in the second region along the width direction, The fourth break induction wire is provided between the second break induction wire and the third break induction wire in the width direction, The packing tape according to claim 1, wherein the third break guiding wire and the fourth break guiding wire are provided at positions offset from each other in the longitudinal direction and the width direction.

4. In claim 3, The packing tape according to claim 1, wherein the third break guiding wires and the fourth break guiding wires are alternately arranged in the longitudinal direction when viewed from the width direction.

5. In claim 3, A fifth breakage guide line is further formed in the second region along the width direction, The packing tape according to claim 1, wherein the fifth break guide line is provided between the second break guide line and the fourth break guide line in the width direction.

6. In claim 5, The packing tape according to claim 1, wherein the fifth break guide line is provided on a straight line passing through the third break guide line in the width direction.

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