Package, packaged rod bundle and method of manufacturing same

Abstract

To provide a package body, a packaged rod-like bundle and a manufacturing method therefor, having high resistance to damage to a rod-like object during transportation or storage despite easy package work.SOLUTION: A package body, used for packaging a plurality of rod-like objects, includes a protection part covering at least one end part in a longitudinal direction of the plurality of rod-like objects and a package film for packaging the plurality of rod-like objects each being provided with the protection part. The protection part provides a package body of substantially-columnar shape or substantially truncated cone shape. A packaged rod-like bundle packaged by the package body and a manufacturing method therefor are also provided.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a package, a packaged rod bundle, and a manufacturing method thereof, and more particularly to a package, a packaged rod bundle, and a manufacturing method thereof that are easy to pack and that prevent damage to rod-shaped objects during transportation and storage. [Background technology]

[0002] A problem with rod-shaped objects having a longitudinal direction is that, during transportation or storage, their ends may accidentally rub against the ground, etc., or may fly out due to impact, vibration, etc., causing scratches, etc.

[0003] In response to such problems, for example, Patent Document 1 discloses a packaging material for packaging an object having a longitudinal direction, the packaging material having a buffer section formed by folding cardboard. Patent Document 2 discloses a bundling protection member that bundles a plurality of linear objects using a protective cover made of soft synthetic resin. Furthermore, as shown in Patent Document 3, resin films have also been used as packaging materials in the past. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-182514 A [Patent Document 2] JP 2018-90290 A [Patent Document 3] JP 2020-175958 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, packaging using cardboard or a protective cover makes the packaging work complicated and generates a large amount of waste after unpacking. Furthermore, packaging using a resin film makes it easy for the rod-shaped objects to be damaged by the film being torn during transportation or storage, and there is also a risk that a part of the rod-shaped object may break through the film and jump out.

[0006] Therefore, the main object of the present invention is to provide a package, a packaged rod bundle, and a manufacturing method thereof that are easy to pack and yet prevent damage to rod-shaped objects during transportation and storage. [Means for solving the problem]

[0007] As a result of intensive experimental investigations, the inventors of the present application have focused on the configuration of the package and discovered a package that is easy to pack yet prevents damage to rod-shaped objects during transportation and storage, a packaged rod-shaped bundle, and a manufacturing method thereof, which have led to the completion of the present invention.

[0008] That is, the present invention provides a package for packaging a plurality of stick-shaped objects, the package comprising a protective part for covering at least one end in the longitudinal direction of the plurality of stick-shaped objects, and a packaging film for packaging the plurality of stick-shaped objects to which the protective part is attached, the protective part being , omitted It is a truncated cone. the protective part is made of a thermoplastic resin, the ratio of the diameter of the upper surface of the protective part to the diameter of the opening of the protective part is 1:1.2 to 1:1.6, and both of the static friction coefficients of the protective part and the packaging film are 0.8 or less. Provide packaging 。 Ma In the present invention, the height of the protective portion may be 60 mm or more and 180 mm or less. Further, in the present invention, The protective portion and the packaging film are made of polyethylene. That's fine. In addition, the thickness of the packaging film may be 65 μm or more and 100 μm or less. The present invention also provides a packaged rod bundle packaged in the above-mentioned package.

[0009] Further, the present invention provides a packaging body for packaging a plurality of stick-shaped objects, the packaging body comprising a protective part for covering at least one end in a longitudinal direction of the plurality of stick-shaped objects, and a packaging film for packaging the plurality of stick-shaped objects to which the protective part is attached, the protective part being , omittedcone Trapezoid Yes the protective part is made of a thermoplastic resin, the ratio of the diameter of the upper surface of the protective part to the diameter of the opening of the protective part is 1:1.2 to 1:1.6, and both of the static friction coefficients of the protective part and the packaging film are 0.8 or less. The present invention also provides a method for manufacturing a packaged rod bundle packaged in a packaging body, which comprises an attachment step of attaching the protective parts to the rod-shaped objects and a packaging step of packaging the rod-shaped objects to which the protective parts are attached in a packaging film, and in which, in the packaging step, at least one longitudinal end of the packaging film before packaging is at least 0.5 cm longer than at least one longitudinal end of the rod-shaped objects to which the protective parts are attached.

[0010] In the present invention, "scratches, etc." refers not only to scratches caused by a part of a rod-shaped object coming into contact with the ground, floor, wall, ceiling, etc., such as by rubbing, but also to a broader concept such as abrasions, stains, deformations, peeling, etc. Effect of the Invention

[0011] According to the present invention, it is possible to provide a package that is easy to pack and that is resistant to damage to rod-shaped objects during transportation and storage, a packaged rod-shaped bundle, and a manufacturing method thereof. Note that the effects described here are not necessarily limited to those described herein, and may be any of the effects described in this specification. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1A is a schematic diagram showing a plurality of rod-shaped objects, and FIG. 1B is a schematic diagram showing a plurality of rod-shaped objects whose ends are protected by protective portions. [Diagram 2] FIG. 1A is a schematic diagram of a protective part having a substantially truncated cone shape, and FIG. 1B is a schematic diagram of a protective part having a substantially cylindrical shape. [Diagram 3] FIG. 2 is a diagram showing a schematic diagram of a package and a packaged rod bundle. [Figure 4] FIG. 4 is a diagram showing a schematic view of an end surface of the PP line shown in FIG. [Diagram 5] FIG. 13 is a diagram showing a schematic view of a packaging process. [Figure 6]FIG. 1A is a diagram showing the results of an example, and FIG. 1B is a diagram showing the results of a comparative example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] 1. Package 1 The packaging body 1 of the present invention is a packaging body 1 for packaging a plurality of rod-shaped objects 10, and comprises a protective part 11 covering at least one longitudinal end 101 of the plurality of rod-shaped objects 10, and a packaging film 12 for packaging the plurality of rod-shaped objects 10 to which the protective part 11 is attached, and is characterized in that the protective part 11 is approximately cylindrical or approximately truncated cone-shaped.

[0014] The package 1 according to the present invention has such a simple structure, which makes the packaging work easy and produces little waste when opened. In addition, it is possible to prevent scratches, abrasions, stains, deformation, peeling, etc. on the stick-shaped objects 10 during transportation and storage, and as a result, it is possible to provide stick-shaped objects 10 that look good when they arrive and are used.

[0015] (1) Rod-shaped object 10 The package 1 according to the present invention is used for packaging two or more rod-shaped objects 10. The lengths, diameters, materials, etc. of the rod-shaped objects 10 to be packaged may be all or partly the same, or all or partly different, but from the viewpoint of ease of handling, it is preferable that the lengths of the rod-shaped objects 10 to be packaged are approximately uniform, as shown in Fig. 1A. In the present invention, a "rod-shaped object" refers to an object whose length is sufficiently long compared to its cross-sectional dimension.

[0016] In the present invention, it is preferred that the multiple rod-shaped objects 10 are partially or entirely bound together, for example, by a resin binding tool, as shown in Fig. 1A, which makes it easier to pack the rod-shaped objects 10 using the protective part 11 and the packing film 12. It is preferred that the rod-shaped objects 10 are bound together at two or more locations in the longitudinal direction of the rod-shaped objects 10, as shown in Fig. 1A.

[0017] The lower limit of the length of the rod-shaped object 10 in the longitudinal direction is not particularly limited, but is preferably 0.7 m or more, and more preferably 1 m or more. If the length of the rod-shaped object 10 is 0.7 m or more, there is a high possibility that the film will break during transportation or storage, that a part of the rod-shaped object will break through the film and jump out, or that the rod-shaped object will come into contact with the ground, floor, wall, ceiling, etc., and therefore the effect of the present invention is easily obtained. The upper limit of the length of the rod-shaped object 10 in the longitudinal direction is not particularly limited, but from the viewpoint of ease of handling, it is preferably 7 m or less, and more preferably 6 m or less.

[0018] The lower limit of the diameter of the rod-shaped object 10 is not particularly limited, but is preferably 2 mm or more, more preferably 3 mm or more, and even more preferably 4 mm or more. If the diameter of the rod-shaped object 10 is 2 mm or more, the film is more likely to be torn during transportation and storage, making it easier to obtain the effects of the present invention. The upper limit of the diameter of the rod-shaped object 10 is not particularly limited, but is preferably 30 mm or less, and more preferably 20 mm or less.

[0019] Furthermore, the number of stick-like objects 10 packed in the package 1 according to the present invention is not particularly limited, but is preferably 10 or more and 300 or less.

[0020] 1 and 3 to 6 are elongated and generally cylindrical, but in the present invention, rod-shaped objects 10 having steps, protrusions, etc. on the circumferential side surface in the longitudinal direction or on a part of the end 101 may be packed. The diameter of the rod-shaped object 10 may be generally constant from one end 101 to the other end 101, or may gradually become smaller or larger from one end 101 to the other end 101, but from the viewpoint of ease of handling, it is preferable that the diameter is generally constant as shown in FIG. 1A.

[0021] The rod-shaped object 10 may be made of a single material or a plurality of materials. When made of a plurality of materials, the rod-shaped object 10 may have a two-layer structure of a core material and a resin covering the periphery thereof, as shown in Fig. 4. Even when the rod-shaped object 10 has such a two-layer structure, the packaging body 1 according to the present invention can prevent scratches, abrasions, dirt, etc. on the outer resin layer.

[0022] The core material can be formed, for example, of an FRP layer (a resin layer reinforced with reinforcing fibers). In this case, examples of reinforcing fibers include inorganic fibers such as carbon fibers and glass fibers; organic fibers such as Kevlar fibers, polyethylene fibers, and polyamide fibers; and two or more of these may be used in combination. Examples of the matrix resin of the FRP layer include thermosetting resins such as epoxy resins, polyester resins, vinyl ester resins, and phenolic resins; thermoplastic resins such as polyamide resins, polyolefin resins, dicyclopentadiene resins, and polyurethane resins; and two or more of these may be used in combination.

[0023] In addition, examples of the resin that covers the periphery of the core material include thermoplastic resins. Examples of the thermoplastic resin include polyolefin resins such as polyethylene (PE), polypropylene (PP), and polystyrene (PS), polyurethane, polycarbonate (PC), polymethyl methacrylate (PMMA), polyacetal (POM), polyvinyl chloride (PVC), ABS resin, AAS resin, AES resin, and MBS resin, and two or more of these may be used in combination. In addition, polyethylene also includes low-density polyethylene (LDPE), high-density polyethylene (HDPE), linear low-density polyethylene, and very low-density polyethylene. In the present invention, in consideration of moldability and cost, the resin that covers the core material is preferably formed from a polyolefin resin or an ABS resin, and among polyolefin resins, it is particularly preferable to form it from polyethylene (PE).

[0024] (2) Protection part 11 The protective part 11 covers at least one end 101 in the longitudinal direction of the plurality of rod-like objects 10, and is generally cylindrical or generally truncated conical as shown in Fig. 2A or 2B. In order to cover the end 101, the protective part 11 has an opening in a part or the whole of the bottom surface of the generally cylindrical or generally truncated cone, and preferably has an opening in the whole of the bottom surface of the generally cylindrical or generally truncated cone (see opening 111 in Fig. 2A and Fig. 2B). On the other hand, the upper surface part 112 of the protective part 11 may have holes, protrusions, etc., but it is preferable that these are not present.

[0025] The protective part 11 preferably covers both longitudinal end parts 101 of the multiple rod-shaped objects 10. However, when the multiple rod-shaped objects 10 are transported or stored in an upright state, the effect of the present invention can be obtained even if the protective part 11 is provided only on the end part 101 that contacts the ground, floor, wall, etc. Furthermore, when both end parts 101 are covered, the shapes of the multiple end parts 101 may be the same or different.

[0026] The protective part 11 may be either substantially cylindrical or substantially truncated cone-shaped, but is preferably substantially truncated cone-shaped. When the protective part 11 is substantially truncated cone-shaped, it becomes easier to attach it to the end parts 101 of the multiple rod-shaped objects 10. If there is any looseness when the end parts 101 are covered with the protective part 11, the loosened part may be folded and fixed with adhesive tape or the like. This makes it difficult for the protective part 11 to come off from the end parts 101.

[0027] When the protective part 11 is substantially truncated cone-shaped, the ratio (L2 / L1) of the diameter L2 of the upper surface part 112 of the protective part 11 to the diameter L1 of the opening part 111 of the protective part 11 is preferably 1:1.2 to 1:1.6. By making the ratio 1:1.2 or more, the protective part 11 can be easily attached to the end parts 101 of the multiple rod-like objects 10. Furthermore, by making the ratio 1:1.6 or less, loosening after attachment to the end parts 101 can be suppressed.

[0028] The height h of the protective part 11 (see height h in Figs. 2A and 2B) is preferably 60 mm or more and 180 mm or less, more preferably 75 mm or more and 165 mm or less, and even more preferably 80 mm or more and 140 mm or less. By making the height of the protective part 11 60 mm or more, it is possible to make it difficult for the protective part 11 to come off from the end part 101 when attached to the end part 101. Furthermore, by making the height of the protective part 11 180 mm or less, it is possible to improve the handling property and also to reduce costs.

[0029] Examples of materials for forming the protective part 11 include thermoplastic resins. Examples of thermoplastic resins are as described above. In the present invention, in consideration of moldability, cost, and the like, it is preferable to form the protective part 11 from a polyolefin resin, and among polyolefin resins, it is particularly preferable to form the protective part 11 from polyethylene (PE).

[0030] Considering moldability, cost, and the like, the thickness of the protective part 11 is preferably 200 μm or more and 5000 μm or less, more preferably 250 μm or more and 3000 μm or less, and further preferably 300 μm or more and 2500 μm or less.

[0031] The flexural modulus of the protective part 11 is preferably 100 MPa or more, and more preferably 120 MPa or more.

[0032] (3) Packaging film 12 The packaging film 12 is used to package the rod-shaped objects 10 to which the protective parts 11 are attached.

[0033] The static friction coefficient of the protective part 11 and / or the static friction coefficient of the packaging film 12 is preferably 0.9 or less, more preferably 0.8 or less. In particular, both the static friction coefficient of the protective part 11 and the static friction coefficient of the packaging film 12 are preferably 0.9 or less, more preferably 0.8 or less. By making each static friction coefficient 0.9 or less, it is possible to prevent the packaging film 12 from being torn or the rod-shaped object 10 from being damaged due to friction. In the present invention, the "static friction coefficient" refers to the static friction coefficient measured by arranging the protective part 11 or the packaging film 12 and sandpaper (AA-240) so as to overlap and rubbing them in accordance with, for example, JIS K 7125. The static friction coefficient of the protective part 11 is the static friction coefficient when the sample sliding piece (upper side) is the protective part 11 and the mating material (lower side) is sandpaper (AA-240), and the static friction coefficient of the packaging film 12 is the static friction coefficient when the sample sliding piece (upper side) is the packaging film 12 and the mating material (lower side) is sandpaper (AA-240).

[0034] The packaging film 12 may be formed of two or more layers, particularly near the upper surface portion 112 side of the protective part 11, as shown in Fig. 3. This can better prevent the end portion 101 of the rod-shaped object 10 from being scratched. The method for forming the multiple layers is not particularly limited, and for example, the multiple layers may be formed by folding the film into two or more layers using a machine or the like, or by deforming the film by heat shrinkage or the like.

[0035] Examples of materials for forming the packaging film 12 include thermoplastic resins. Examples of thermoplastic resins are as described above. In the present invention, in consideration of formability, cost, and the like, it is preferable to form the packaging film 12 from a polyolefin-based resin, and among polyolefin-based resins, it is particularly preferable to form the packaging film 12 from polyethylene (PE).

[0036] Taking into consideration formability, cost, and the like, the thickness of the packaging film 12 is preferably 50 μm or more and 150 μm or less, more preferably 60 μm or more and 125 μm or less, and even more preferably 65 μm or more and 100 μm or less.

[0037] The flexural modulus of the packaging film 12 is preferably 100 MPa or more, and more preferably 120 MPa or more.

[0038] 2. Packed rod bundles The packaged rod bundle 2 according to the present technology is packaged using the package 1 according to the present invention described above. Therefore, the packaging work is easy, there is little waste when opening the package, and the rod-shaped objects 10 are less likely to be scratched during transportation and storage, so that it is possible to provide rod-shaped objects 10 that look good when they arrive and when they are used.

[0039] 3. Manufacturing method of packaged rod bundles The method for producing a packaged rod bundle according to the present invention is a method for producing the packaged rod bundle 2 according to the present invention described above, and is characterized by at least performing an attachment step and a packaging step. The method for producing a packaged rod bundle according to the present invention may also perform a fixing step, a bundling step, etc., as necessary.

[0040] (1) Installation process The attachment step is a step of attaching the protective part 11 to the plurality of rod-shaped objects 10. Specifically, for example, the protective part 11 is inserted into the ends 101 of the plurality of rod-shaped objects 10 from the opening 111 side and attached. When the protective part 11 is attached to both ends of the rod-shaped object 10, it may be attached to each end 101, or it may be attached to both ends 101 at the same time. If there is any slack in the peripheral surface of the protective part 11 when covered with the protective part 11, a fixing step may be further performed in which the loosened portion is folded and fixed with adhesive tape or the like.

[0041] In addition, it is preferable that a part or all of the plurality of rod-shaped objects 10 are previously bound together with a resin binder or the like. In this case, a bundling step of bundling the plurality of rod-shaped objects 10 may be carried out before this step. As the resin binder, for example, a conventionally known one may be used.

[0042] (2) Packaging process The packaging step is a step of packaging the plurality of rod-shaped objects 10 to which the protective parts 11 are attached, in a packaging film 12. Specifically, for example, the packaging film 12 (before packaging) is attached to the plurality of rod-shaped objects 10 to which the protective parts 11 are attached, and packaging is performed by deforming the packaging film 12 by heat shrinkage or the like so as to fit the shape of the plurality of rod-shaped objects 10.

[0043] FIG. 5 is a diagram showing a typical state of the packaging process. This process is characterized in that at least one end 121 in the longitudinal direction of the packaging film 12 before packaging (i.e., before deformation due to thermal shrinkage, etc.) is 0.5 cm or more longer than at least one end 101 of the plurality of rod-shaped objects 10 to which the protective portion 11 is attached. Explained with reference to FIG. 5, this refers to a length represented by D being 0.5 cm or more. This allows the end 101 of the rod-shaped object 10 to be more firmly protected after packaging. In particular, when deformation occurs due to thermal shrinkage, it becomes easier to form the vicinity of the upper surface portion 112 side of the protective portion 11 in a plurality of layers of two or more. The upper limit value of the length represented by D is not particularly limited, but is preferably 20 cm or less in consideration of ease of handling, cost, etc.

[0044] The present invention will now be described in further detail with reference to examples. The embodiment described below is merely a representative example of the present invention, and the scope of the present invention should not be construed as being narrow.

[0045] <Example> Both ends of the bundled rod-shaped objects were covered with a truncated cone-shaped PE protective part, and the loose parts of the protective part were folded and fixed with adhesive tape so that the protective part would not become loose around the rod-shaped objects. The ratio of the diameter of the upper surface of the protective part to the diameter of the opening of the protective part was 1:1.4. The rod-shaped objects were then packaged in a 75 μm-thick PE film using an automatic packaging machine. A transportation test was conducted using a shipping company from Gifu to Hokkaido, and the packaged rod-shaped bundle that arrived was inspected. As shown in Figure 6A, scratches were found on the PE film and protective part, but no breakthrough of the film by the rod-shaped objects or scratches on the rod-shaped objects themselves were found.

[0046] <Comparative Example> A test similar to that of the example was conducted, except that the ends of the bundled rod-shaped objects were not covered with protective parts. A transport test was conducted using a transport company from Gifu to Hokkaido, and when the packaged rod-shaped bundle arrived, the PE film was torn, and the rod-shaped objects had punctured the film and the rod-shaped objects themselves were scratched, as shown by the arrows in Figure 6B. [Industrial Applicability]

[0047] According to the present invention, it is possible to provide a package that is easy to pack, produces little waste when opened, and is resistant to scratches on rod-shaped objects during transportation and storage, a packaged rod-shaped bundle, and a manufacturing method thereof. Therefore, it is possible to provide rod-shaped objects that look good when they arrive and are used, which is useful in fields such as logistics. [Explanation of symbols]

[0048] 1: Packaging 10: Rod-shaped object 101: End 11:Protection Department 111: Opening 112:Top part 12: Packaging film 121: End of packaging film 2: Packed rod bundle

Claims

1. A package for packaging a plurality of rod-shaped objects, A protective part covering at least one end of the plurality of rod-shaped objects in the longitudinal direction; A packaging film for packaging the plurality of rod-shaped objects to which the protective portion is attached; having The protective portion is generally truncated cone-shaped, The protective portion is formed of a thermoplastic resin, The ratio of the diameter of the upper surface of the protective part to the diameter of the opening of the protective part is 1:1.2 to 1:1.6; and A package, wherein the static friction coefficients of the protective portion and the packaging film are both 0.8 or less.

2. The packaging body according to claim 1 , wherein the height of the protective portion is equal to or greater than 60 mm and equal to or less than 180 mm.

3. A packaging body as described in claim 1 or 2, wherein the protective part and the packaging film are formed of polyethylene.

4. A packaging body described in any one of claims 1 to 3, wherein the thickness of the packaging film is 65 μm or more and 100 μm or less.

5. A packaged rod bundle packaged using the packaging body according to any one of claims 1 to 4.

6. A method for manufacturing a packaged rod-shaped bundle packaged in a package for packaging a plurality of rod-shaped objects, the package comprising a protective part covering at least one end of the rod-shaped objects in a longitudinal direction, and a packaging film for packaging the rod-shaped objects to which the protective part is attached, the protective part being substantially frustum-shaped, the protective part being made of a thermoplastic resin, a ratio of a diameter of an upper surface of the protective part to a diameter of an opening of the protective part being 1:1.2 to 1:1.6, and both of the protective part and the packaging film having a static friction coefficient of 0.8 or less, the method comprising the steps of: a mounting step of mounting the protective portion to the plurality of rod-shaped objects; a packaging step of packaging the plurality of rod-shaped objects to which the protective portions are attached in a packaging film; Do the following: A method for producing a packaged rod bundle, wherein in the packaging step, at least one longitudinal end of the packaging film before packaging is at least 0.5 cm longer than at least one longitudinal end of the plurality of rod-shaped objects to which the protective portion is attached.

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