Cardboard protective tape

Abstract

To provide a novel means for preventing a hand injury due to a lateral surface of a cardboard plate.SOLUTION: A protective tape for a cardboard 10 includes a belt-shaped body part 12 which is stuck to a lateral part including a lateral surface where a middle core of a cardboard plate appears, and which is stuck to the lateral surface of the cardboard plate, and a plurality of protrusions 14 which are disposed on both sides of the belt-shaped body part 12 and are stuck to front and rear surfaces of the cardboard plate.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a protective tape for corrugated cardboard that prevents hand tearing caused by the side surfaces of corrugated cardboard. [Background technology]

[0002] Corrugated cardboard is reusable, environmentally friendly, inexpensive, lightweight, durable, and easy to process, and is therefore used for a variety of purposes, including packaging boxes, furniture, ornaments, toys, and more.

[0003] In the manufacture of such corrugated boards, a cutting method called die cutting is usually used, in which a corrugated board sheet formed by laminating cardboard base paper together is fitted into a die and punched out with a blade in accordance with standards such as JIS. The cut surfaces that become the sides of the corrugated board punched out by this die are sharp and can easily cut fingers and hands, causing injuries to workers and users.

[0004] One technique for preventing such hand cuts is to form the blades used in cutting dies into a special shape, such as a wavy shape, to make the sides of the cardboard less likely to cut fingers (see Patent Document 1). However, in this case, the use of specially shaped blades poses problems such as the investment costs for manufacturing the blades and the equipment required to fit them, as well as the low durability of the blades, which increases the running costs for replacement and maintenance. Furthermore, even when using such specially shaped blades, there is the problem that sharp edges remain on the cut surfaces of the cardboard. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2018-130792 Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a novel means for preventing hand cuts caused by the sides of a corrugated cardboard sheet. [Means for solving the problem]

[0007] While studying the problem of hand cuts caused by the side surfaces of corrugated cardboard, the inventors focused on processing the side surfaces of the corrugated cardboard after cutting, rather than processing the side surfaces of the corrugated cardboard sheet when cutting, and tried various methods. As a result, they found that by using a protective tape for corrugated cardboard that is configured to have a strip-shaped main body that is attached to the side surfaces of the corrugated cardboard and a plurality of protrusions that are attached to the front and back surfaces of the corrugated cardboard, it is possible to easily and accurately cover the side surfaces (cut surfaces) of the corrugated cardboard, and protect the user's hands from sharp parts of the cut surfaces of the corrugated cardboard, and they have completed the present invention.

[0008] That is, the present invention is as follows. [1] A protective tape for corrugated board that is attached to the side of a corrugated board, including the side where the core of the board is exposed. A protective tape for cardboard, characterized in that it comprises a band-shaped main body portion that is attached to the side of the cardboard board, and a plurality of protrusions provided on both sides of the band-shaped main body portion and attached to the front and back surfaces of the cardboard board. [2] The protective tape for cardboard according to [1] above, characterized in that it has a linear fold at the boundary between the belt-shaped main body portion and the convex portion. [3] The protective tape for cardboard according to [1] or [2] above, characterized in that the width of the belt-shaped main body corresponds to the thickness of the side of the cardboard board. [4] The protective tape for cardboard according to any one of [1] to [3] above, characterized in that the width length of the belt-shaped main body portion is any one of 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, and 50 mm. [5] The cardboard protective tape according to any one of [1] to [4] above, characterized in that the plurality of protrusions provided on both sides of the belt-shaped main body are arranged continuously in the tape length direction and are formed in a wavy pattern undulating at regular intervals. [6] The protective tape for cardboard according to any one of the above [1] to [5], characterized in that the height of the plurality of convex portions is 6 to 8 mm.

[0009] [7] A protected corrugated board, characterized in that the protective tape for corrugated board according to any one of [1] to [6] above is attached to a side portion of the corrugated board, including the side on which the core of the board is exposed. [8] A method for producing a protected corrugated board, comprising applying the protective tape for corrugated board according to any one of [1] to [6] above to a side of a corrugated board, including a side on which the core is exposed. [9] The method for manufacturing a protective corrugated board according to [8] above, characterized in that the protective tape for corrugated board is applied to the side of the corrugated board while being heated. [Effects of the Invention]

[0010] The protective tape for corrugated cardboard of the present invention can be easily and accurately applied to a corrugated cardboard board, and can prevent the tape from being torn by the side of the corrugated cardboard board. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is an explanatory view of a cardboard protective tape according to a first embodiment of the present invention. [Figure 2] 2 is a photograph of a protective corrugated board according to the first embodiment, which is provided with the protective tape for corrugated board shown in FIG. 1. [Figure 3] 3 is a photograph of a protective corrugated board according to a second embodiment, which is provided with the protective tape for corrugated board shown in FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0012] The protective tape for cardboard of the present invention is a protective tape for cardboard that is applied to the side of a cardboard board, including the side where the core of the cardboard board appears, and is characterized by having a band-shaped main body portion that is applied to the side of the cardboard board, and a plurality of protrusions that are provided on both sides of the band-shaped main body and are applied to the front and back surfaces of the cardboard board. In this invention, the "side surface" refers to a cut surface where the core of the cardboard appears, and includes the inner peripheral side surface where the core of the cardboard appears when the cardboard is cut out. In addition, the "front and back surfaces" in this invention refer to the surfaces of the two flat plates (liners) that form the front and back surfaces of the cardboard.

[0013] The protective tape for cardboard of the present invention can cover (seal) the sides, including the cut surfaces of the cardboard board, and therefore can protect the user's hands from sharp parts of the cardboard board and prevent cuts to the hands caused by the sides of the cardboard board.

[0014] Furthermore, since the belt-shaped main body portion of the cardboard protective tape is attached to the side of a cardboard sheet, and the multiple protrusions on both sides of the belt-shaped main body portion are attached to the front and back surfaces of the cardboard sheet, the cardboard protective tape can be easily and accurately attached to the cardboard sheet. That is, when attaching the belt-shaped main body portion of the cardboard protective tape to the side of a cardboard sheet, the position of the edge of the side of the cardboard sheet can be confirmed through the gaps between the protrusions, so the cardboard protective tape can be neatly and easily attached to the cardboard sheet along the side of the cardboard sheet without slipping. When attaching conventional general band-shaped tapes to the side of a cardboard sheet, problems such as the inability to apply the tape straight or the inability to be folded neatly and attached to the front and back surfaces of the cardboard sheet have occurred, but the cardboard protective tape of the present invention avoids these problems.

[0015] Furthermore, the cardboard protective tape of the present invention has its strip-shaped main body attached to the side of the cardboard board and its protruding portions attached to the front and back surfaces of the cardboard board, so it can be firmly attached to the cardboard board without the problem of easy peeling that occurs when conventional, general strip-shaped tapes are attached to the side of cardboard boards.

[0016] Furthermore, the protective tape for corrugated cardboard of the present invention can neatly cover the cut surfaces of the side of the corrugated cardboard board and conceal the cut surfaces of the corrugated cardboard board, thereby providing a protective corrugated cardboard board with high designability and excellent aesthetics.Furthermore, it can improve the airtightness of the corrugated cardboard board and provide a protective corrugated cardboard board with high thermal insulation.

[0017] <Corrugated cardboard> The cardboard board to which the cardboard protective tape of the present invention can be applied is not particularly limited as long as it is what is generally called cardboard, which has a core between two flat plates (liners), and examples of materials include paper, plastic, etc.

[0018] The configuration (structure) of the corrugated cardboard may be one having one core or a multi-layer structure having two or more cores (reinforced corrugated cardboard structure). The thickness of the corrugated cardboard is not particularly limited, and may be 3 mm, 4 mm, 5 mm, etc., but the 5 mm thick one, so-called A flute, is the most commonly used. Also, a product formed by appropriately gluing various types of corrugated cardboard together can be used. For example, by gluing together 5 mm thick pieces, so-called A flute, it is possible to obtain thicknesses of 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, etc.

[0019] <Protective tape for corrugated cardboard> The protective tape for corrugated cardboard of the present invention is an adhesive tape having an adhesive applied to one surface of a substrate.

[0020] The material of the substrate can be appropriately selected depending on the type of corrugated board to which it is to be attached, and examples thereof include paper, plastic, cloth, etc. In the case of a paper substrate, it can be suitably used for paper corrugated board. Specific examples of paper include kraft paper. Furthermore, in the case of a plastic substrate, it can be suitably used for plastic corrugated board. Specific examples of plastic include polypropylene film.

[0021] The type of adhesive attached to the substrate is not particularly limited, and examples thereof include rubber-based, acrylic-based, silicone-based, etc. The protective tape for cardboard of the present invention may be provided with a protective layer on the surface of the substrate opposite the adhesive for the purpose of improving water resistance, airtightness, etc.

[0022] Furthermore, the protective tape for cardboard may be cut to a predetermined length according to the size of the cardboard board, but it is preferable that it be cut to a predetermined length as needed during use.

[0023] [Band-shaped main body] The strip-shaped main body portion is formed in a long strip shape in the center of the corrugated cardboard protective tape and is the portion to be attached to the side of the corrugated cardboard sheet. The width of the strip-shaped main body portion is not particularly limited as long as it can cover the side of the corrugated cardboard sheet, and it is preferable that it corresponds to the thickness of the side of the corrugated cardboard sheet. Note that the width of the strip-shaped main body portion corresponding to the thickness of the side of the corrugated cardboard sheet means a length that is substantially the same as the thickness of the side of the corrugated cardboard sheet when the tape is attached with its center aligned with the side of the corrugated cardboard sheet, and includes a length of tape that extends beyond both sides of the side of the corrugated cardboard sheet by 0.5 mm or less, preferably 0.3 mm or less.

[0024] The width of the belt-shaped main body can be set appropriately according to the thickness of the corrugated cardboard, but is preferably a multiple of 5 mm, the thickness of the most commonly used corrugated cardboard known as A flute, and more specifically, any of 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, and 50 mm is preferred. Specifically, for example, in the case of a two-ply reinforced corrugated cardboard structure with two layers of A flutes, the preferred width of the belt-shaped main body is 10 mm, and in the case of a three-ply reinforced corrugated cardboard structure with three layers of A flutes, the preferred width of the belt-shaped main body is 15 mm.

[0025] [Convex] The convex portions are formed on both sides of the belt-shaped main body portion and are attached to the front and back surfaces of the corrugated cardboard. The shape of the convex portions is not particularly limited, and examples thereof include mountain-like, hemispherical, rectangular, and other various shapes. By attaching the belt-shaped main body portion to the side surface of the corrugated cardboard and attaching the convex portions to the front and back surfaces of the corrugated cardboard, the tape can be firmly attached to the corrugated cardboard. Furthermore, when attaching the belt-shaped main body portion of the cardboard protective tape to the side surface of the corrugated cardboard, the position of the edge of the side surface of the corrugated cardboard can be confirmed through the gaps between the convex portions, allowing for neat and accurate attachment to the corrugated cardboard.

[0026] The plurality of protrusions are preferably provided intermittently or continuously in the length direction. An embodiment in which the plurality of protrusions are provided intermittently in the length direction means, for example, an embodiment in which the protrusions are provided at predetermined intervals in the length direction. The intervals between the protrusions are, for example, 5 to 60 mm, preferably 10 to 45 mm, and more preferably 15 to 30 mm.

[0027] Furthermore, examples of embodiments in which multiple convex portions are provided continuously in the length direction include convex portions of the same shape provided continuously in the length direction, convex portions of different shapes provided continuously in the length direction, convex portions of different heights provided continuously in the length direction, and convex portions of different widths and lengths provided continuously in the length direction. The pitch of the convex portions is not particularly limited and is, for example, 5 to 60 mm, preferably 10 to 45 mm, more preferably 15 to 30 mm, even more preferably 16 to 20 mm, and particularly preferably 18 mm. Specifically, the multiple convex portions may be provided continuously in the length direction and formed in a wavy pattern that undulates at regular intervals (a predetermined pitch).

[0028] The height of the convex portion (the maximum length from the belt-shaped main body portion) is not particularly limited, and is, for example, 1 to 20 mm, preferably 3 to 15 mm, more preferably 5 to 10 mm, even more preferably 6 to 8 mm, and particularly preferably 7 mm.

[0029] [fold] The cardboard protective tape of the present invention preferably has a linear crease at the boundary between the belt-shaped main body portion and the convex portion. This allows the belt-shaped main body portion to be aligned with the edge of the side of the cardboard board using the crease as a guide when applying the tape to the cardboard board, thereby enabling accurate application of the cardboard protective tape. Furthermore, the cardboard protective tape can be easily applied to the front and back surfaces of the cardboard board simply by folding the multiple convex portions along the crease. Examples of creases include linear grooves formed at the boundary between the belt-shaped main body portion and the convex portion, and continuous small holes (perforations) formed at the boundary between the belt-shaped main body portion and the convex portion. The linear grooves can be formed in the substrate. The perforations can be formed so as to penetrate the cardboard protective tape, or can be formed only in the substrate.

[0030] The thickness of the protective tape for corrugated cardboard is not particularly limited, and is, for example, about 0.01 to 1 mm, preferably about 0.05 to 0.5 mm, more preferably about 0.08 to 0.3 mm, and even more preferably about 0.1 to 0.2 mm.

[0031] Next, a description will be given of a protected corrugated board provided with the above-described protective tape for corrugated board of the present invention. The corrugated board of the present invention is characterized in that the protective tape for corrugated board is applied to the side of the board, including the side where the core is exposed. This eliminates sharp edges on the cut surface of the corrugated board, preventing hand cuts caused by the side of the board, resulting in a safe product. Furthermore, since the side of the board, which is the cut surface, is covered, the board has an excellent aesthetic appearance. It also has high airtightness and high thermal insulation properties.

[0032] The method for producing a protected corrugated board of the present invention is characterized in that the above-described protective tape for corrugated board of the present invention is applied to the side of a corrugated board, including the side where the core is exposed. Specifically, for example, the width of the strip-shaped main body of the cardboard protective tape is adjusted and applied to the side of the cardboard board, and the convex portion of the cardboard protective tape is then folded over and applied to the front and back sides of the cardboard board. Furthermore, when applying the cardboard protective tape to the cardboard board, it is preferable to apply the cardboard protective tape to the side of the cardboard board while heating it. This prevents gaps from forming between the cardboard board and the cardboard protective tape, allowing for a cleaner and stronger application. Examples of heating methods include heating the cardboard protective tape temporarily applied to the cardboard board from the front side using a heater such as a handheld iron. The heating temperature is not particularly limited as long as it does not deform the cardboard board or the cardboard protective tape, and is, for example, about 80 to 240°C, preferably about 100 to 220°C, more preferably about 120 to 200°C, even more preferably about 150 to 180 mm, and particularly preferably about 170°C.

[0033] Hereinafter, embodiments of the protective tape for corrugated cardboard of the present invention will be specifically described with reference to the drawings, but the present invention is not limited to these embodiments.

[0034] Here, Fig. 1 is an explanatory diagram of a cardboard protective tape according to a first embodiment of the present invention. Fig. 2 is a photograph of a protected cardboard board according to the first embodiment, which is provided with the cardboard protective tape shown in Fig. 1. Fig. 3 is a photograph of a protected cardboard board according to a second embodiment, which is provided with the cardboard protective tape shown in Fig. 1. Note that the drawings referred to in the embodiments are drawn schematically to facilitate understanding, and the dimensional ratios of objects depicted in the drawings may differ from the dimensional ratios of actual objects.

[0035] 1, the cardboard protective tape 10 according to the first embodiment of the present invention comprises a central strip-shaped main body 12 formed in a long strip shape, and a plurality of protrusions 14 provided on both sides of the strip-shaped main body 12. The cardboard protective tape 10 has a rubber-based adhesive attached to one side of a base material made of kraft paper, and is approximately 0.1 mm thick.

[0036] The strip-shaped main body 12 is approximately 15 mm in width and length.

[0037] The protrusions 14 are mountain-shaped protrusions with a height of about 7 mm that protrude from both sides of the band-shaped main body 12. The protrusions 14 are provided continuously in the length direction and are formed in a wavy shape that undulates at regular intervals (a pitch of about 18 mm).

[0038] Linear perforations 16 are provided at the boundaries between the strip-shaped main body 12 and the protruding portions 14. Using these perforations 16 as a guide, the strip-shaped main body 12 can be aligned with the edge of the side of the cardboard, allowing for accurate application. Furthermore, by simply bending the multiple protruding portions 14 along the perforations 16, the tape can be easily applied to the front and back surfaces of the cardboard (see Figure 2).

[0039] Next, a protective corrugated board according to a first embodiment equipped with the above-mentioned protective tape for corrugated board will be described.

[0040] 2, the protective corrugated board 18 according to the first embodiment comprises a rectangular corrugated board 20 with notches formed in the four corners, and the above-mentioned protective tape for corrugated board 10 attached to the side, including the side surface 22 where the core of the corrugated board 20 appears. The protective corrugated board 18 has the strip-shaped main body 12 of the protective tape for corrugated board 10 attached to its side, and a plurality of folded protrusions 14 attached to the periphery of its front and back surfaces.

[0041] 2, for the sake of convenience in understanding the portions to which the cardboard plate 20 and the cardboard protective tape 10 are attached, the protective cardboard plate 18 has an exposed portion 22 on one side where the cardboard protective tape 10 is not attached. As shown in the exposed portion 22, the cardboard protective tape 10 is attached to the side (cut surface) of the cardboard plate 20. The cardboard plate 20 has a three-ply reinforced cardboard plate structure with a thickness of 15 mm and three layers of A-flute.

[0042] The protective cardboard plate 18 is attached neatly and accurately because the belt-shaped main body 12 is aligned with the edge of the side of the cardboard plate 20 using the perforations 16 of the cardboard protective tape 10 as a guide. In addition, the multiple protrusions 14 on both sides of the belt-shaped main body 12 are arranged continuously in the length direction and are formed in a wavy pattern that undulates at regular intervals, giving it an excellent appearance, and there is little overlap between adjacent protrusions 14 when the cardboard protective tape is folded at the corners, allowing for neat attachment.

[0043] Next, a protective corrugated board according to a second embodiment, which is provided with the above-mentioned protective tape for corrugated board, will be described.

[0044] As shown in Figure 3, a protective corrugated board 24 according to the second embodiment comprises a square corrugated board 28 having a circular hole 26 in the center, and the above-mentioned protective tape for corrugated board 10 attached along the side (inner peripheral side) including the side (inner peripheral side) where the core of the hole 26 of the corrugated board 28 appears. The protective corrugated board 24 is a 15 mm thick three-ply reinforced corrugated board with three A-flute layers, and the strip-shaped main body 12 of the protective tape for corrugated board 10 is attached to the inner peripheral side of the central hole 26, and a plurality of folded protrusions 14 are attached to the front and back surfaces of the inner peripheral side.

[0045] The protective cardboard plate 24 is attached neatly and accurately because the band-shaped main body 12 is aligned with the side of the cardboard plate 24 using the perforations 16 of the cardboard protective tape 10 as a guide. In addition, the multiple protrusions 14 provided on both sides of the band-shaped main body 12 are provided continuously in the length direction and are formed in a wavy pattern that undulates at regular intervals, giving it an excellent aesthetic appearance, and there is little overlap between adjacent protrusions 14 when the tape is bent at the curved portion, allowing for neat attachment. [Industrial Applicability]

[0046] The protective tape for corrugated cardboard of the present invention can be used as a protective tape to prevent the corrugated cardboard from being torn by hand, and is therefore industrially useful. [Explanation of symbols]

[0047] 10. Cardboard protective tape 12 Belt-shaped main body 14 Convex part 16 perforations 18 Protective cardboard board 20 Corrugated cardboard 22 Exposed part 24 Protective cardboard board 26 Hole 28 Corrugated cardboard

Claims

1. A protective tape for corrugated board that is attached to the side of a corrugated board, including the side where the core of the board is exposed, A belt-shaped main body portion is attached to the side surface of the cardboard board, and a plurality of protrusions are provided on both sides of the belt-shaped main body portion and attached to the front and back surfaces of the cardboard board, A protective tape for corrugated cardboard, characterized in that the width of the belt-shaped main body portion corresponds to the thickness of the side surface of the corrugated cardboard board.

2. 2. The protective tape for cardboard according to claim 1, wherein a linear fold is formed at the boundary between the belt-shaped main body portion and the protrusion.

3. 3. The protective tape for cardboard according to claim 1, wherein the width of the belt-shaped main body is any one of 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, and 50 mm.

4. The protective tape for cardboard according to any one of claims 1 to 3, characterized in that the plurality of convex portions provided on both sides of the belt-shaped main body portion are provided continuously in the tape length direction and are formed in a wavy pattern undulating at regular intervals.

5. The protective tape for corrugated cardboard according to any one of claims 1 to 4, wherein the height of the plurality of convex portions is 6 to 8 mm.

6. A protective corrugated board, characterized in that the protective tape for corrugated board according to any one of claims 1 to 5 is stuck to a side portion of the corrugated board, including a side portion on which the core of the corrugated board is exposed.

7. A method for producing a protected corrugated board, comprising applying the protective tape for corrugated board according to any one of claims 1 to 5 to a side of the corrugated board, including a side on which the core of the corrugated board is exposed.

8. 8. The method for manufacturing a protective corrugated board according to claim 7, wherein the protective tape for corrugated board is applied to the side of the corrugated board while being heated.

Images