Packaging and method for manufacturing packaging

Abstract

The present invention provides a packaging body and a method for manufacturing the packaging body that can reduce indentations on the surface and edges of the laminated film forming the wound body. [Solution] The packaging body 1 comprises a roll body 2 having a core 20 and a winding body 21 of laminated film 210 wound around the core 20; a cushioning material 3 fixed to the core 20 and positioned on each of the axial sides of the core 20 so as to contact the side surface of the winding body 21; a packaging material 4 covering the roll body 2 and the cushioning material 3; and side plates 5 positioned on each of the axial sides of the core 20 on the side opposite to the winding body 21 relative to the cushioning material 3. Furthermore, in the radial direction of the core 20, the cushioning material 3 has an overhang portion 31 that extends beyond the outside of the winding body 21. In addition, in the radial direction of the core 20, there is a gap between the outermost surface of the winding body 21 and the packaging material 4.

Description

Technical Field

[0001] The present invention relates to a package and a method for manufacturing the package.

Background Art

[0002] Conventionally, a roll-shaped product package is known that includes a roll-shaped product having a sheet-shaped product wound around a core, a moisture-proof film that covers the outer peripheral surface and end surfaces of the roll-shaped product from the outside, and a side protection member having an insertion portion that can be fitted into the hollow portion of the core, and a flat protection plate having a width larger than the diameter of the end surface of the roll-shaped product (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] On the other hand, in the roll-shaped product described in Patent Document 1, depending on the configuration of the sheet-shaped product that forms the roll-shaped product, when a packaging material such as a moisture-proof film is brought into contact with the roll-shaped product, push marks may occur on the surface of the laminated film.

[0005] Also, in the roll-shaped product described in Patent Document 1, depending on the configuration of the sheet-shaped product that forms the roll-shaped product, when attaching the flat protection plate, push marks may also occur at the ends of the laminated film.

[0006] An object of the present invention is to provide a package and a method for manufacturing the package that can reduce push marks on the surface and ends of a laminated film that forms a wound body.

Means for Solving the Problems

[0007] The present invention [1] includes a roll body comprising a core and a winding body of laminated film wound around the core; a cushioning material fixed to the core and positioned on each of the axial sides of the core so as to be in contact with the side surface of the winding body; a packaging material covering the roll body and the cushioning material; and side plates positioned on each of the axial sides of the core on the side opposite to the winding body relative to the cushioning material, wherein in the radial direction of the core, the cushioning material has an overhang that extends beyond the outside of the winding body, and in the radial direction, there is a gap between the outermost surface of the winding body and the packaging material.

[0008] The present invention [2] includes the packaging described in [1] above, wherein the laminated film comprises a resin film, and the transmittance of the resin film is less than 50%.

[0009] The present invention [3] includes the packaging described in [1] or [2] above, wherein the laminated film comprises a resin film, and the resin film has voids.

[0010] The present invention [4] includes a packaging body according to any one of [1] to [3] above, wherein the laminated film comprises a metallic reflective layer.

[0011] The present invention [5] includes a packaging body according to any one of the above [1] to [4], wherein the packaging material is an aluminum film.

[0012] The present invention [6] includes a packaging body according to any one of [1] to [5] above, wherein the length of the cushioning material over the entire radial region is longer than the diameter of the roll body.

[0013] The present invention [7] includes a packaging body according to any one of the above [1] to [6], wherein the cushioning material is made of a cushioning material, and the roll body is self-supporting with the cushioning material fixed to the core.

[0014] The present invention [8] includes a packaging body according to any one of the above [1] to [6], wherein the cushioning material consists of a cushioning material and a plate material, and the roll body is self-supporting with the cushioning material fixed to the core.

[0015] The present invention [9] includes a method for manufacturing a package, comprising: a preparation step of preparing a roll body comprising a core and a winding body of laminated film wound around the core; a fixing step of fixing a cushioning material to the core on each of the axial sides of the core so as to be in contact with the side surface of the winding body; a covering step of covering the roll body and the cushioning material with a packaging material; and an arrangement step of arranging a side plate on each of the axial sides of the core on the side opposite to the winding body relative to the cushioning material, wherein in the radial direction of the core, the cushioning material has an overhang that extends beyond the outside of the winding body, and in the radial direction, there is a gap between the outermost surface of the winding body and the packaging material.

[0016] The present invention

[10] further includes a method for manufacturing a packaging body as described in [9] above, comprising a degassing step after the covering step of degassing the roll body and the cushioning material covered with the packaging material. [Effects of the Invention]

[0017] The packaging of the present invention includes a cushioning material between the winding body and the side plate on both axial sides of the core. Therefore, indentations on the edges of the laminated film forming the winding body can be reduced. Furthermore, in the radial direction of the core, the cushioning material has an overhang that extends beyond the outside of the winding body. And, in the radial direction of the core, a gap is maintained between the outermost surface of the winding body and the packaging material. Therefore, indentations on the surface of the laminated film forming the winding body can be reduced.

[0018] The manufacturing method of the package of the present invention includes a fixing step of fixing a cushioning material to a core so as to contact the side surface of the wound body on each of both axial ends of the core. Therefore, it is possible to manufacture a package that can reduce the indentation marks at the ends of the laminated film forming the wound body. Further, in the radial direction of the core, the cushioning material has a protruding portion that protrudes outside the wound body. And, in the radial direction of the core, a gap is provided between the outermost surface of the wound body and the packaging material. Therefore, it is possible to manufacture a package that can reduce the indentation marks on the surface of the laminated film forming the wound body.

Brief Description of Drawings

[0019] [Figure 1] FIG. 1A and FIG. 1B show an embodiment of the package of the present invention. FIG. 1A shows a perspective view, and FIG. 1B shows a cross-sectional view taken along line A-A. [Figure 2] FIG. 2 shows a cross-sectional view of the laminated film forming the wound body and an enlarged view of the resin film included in the laminated film in the package shown in FIG. 1. [Figure 3] FIG. 3A and FIG. 3B show an embodiment of the manufacturing method of the package of the present invention. FIG. 3A shows a preparation step of preparing a roll body, and FIG. 3B shows a fixing step of fixing a cushioning material. [Figure 4] FIG. 4A and FIG. 4B show an embodiment of the manufacturing method of the package following FIGS. 3A and 3B. FIG. 4A shows a coating step of coating the roll body and the cushioning material with a packaging material, and FIG. 4B shows an arranging step of arranging side plates. [Figure 5] FIG. 5 shows a first modification of the package, showing the state (roll body and cushioning material) before being covered with a packaging material. [Figure 6] FIG. 6 shows a second modification of the package, showing the state (roll body and cushioning material) before being covered with a packaging material. [Figure 7] FIG. 7 shows a third modification of the package, showing the state (roll body and cushioning material) before being covered with a packaging material.

Embodiments for Carrying Out the Invention

[0020] 1. Packaging An embodiment of the packaging body 1 of the present invention will be described with reference to Figures 1 and 2.

[0021] In the following, the axial direction refers to the axial direction of the winding core 20, and the radial direction refers to the radial direction of the winding core 20. Furthermore, the axial direction coincides with the short side direction (width direction) of the laminated film 210 (winding body 21).

[0022] The packaging body 1 shown in Figure 1 comprises a roll body 2, cushioning material 3, packaging material 4, and side plates 5.

[0023] 1.1. Rolled The roll body 2 comprises a core 20 and a winding body 21 of laminated film 210 wound multiple times around the core 20. The roll body 2 also optionally includes an adhesive member (not shown).

[0024] The diameter (radial length) of the roll body 2 is not particularly limited, but for example, it is 50 mm or more, preferably 100 mm or more, and for example, 400 mm or less, preferably 350 mm or less. The diameter of the roll body 2 is the straight-line distance between the outermost surfaces of the winding bodies 21 that are connected so as to pass through the center of the winding core 20 in the radial direction.

[0025] (1) Core The core 20 is the core around which the laminated film 210 is wound. The core 20 extends in the axial direction.

[0026] The shape of the core 20 is not particularly limited. From the viewpoint of easily winding the laminated film 210, examples of the core 20's shape include a substantially cylindrical shape and a substantially cylindrical shape (hollow cylindrical shape). In this embodiment, the core 20 is substantially cylindrical.

[0027] The material of the core 20 is not particularly limited. Examples of materials for the core 20 include polymer materials, paper materials, and metal materials. Polymer materials are preferred.

[0028] Examples of polymer materials for the core 20 include acrylonitrile-butadiene-styrene copolymer (ABS), polyethylene, polypropylene, polyvinyl chloride, polystyrene, ethylene-propylene copolymer, and ethylene-vinyl acetate copolymer. ABS is preferred. Examples of metal materials for the core 20 include iron, stainless steel, and aluminum.

[0029] The core 20 may be a single layer or a multi-layer core. A multi-layer core 20 may include, for example, a core 20 comprising a hard layer made of a polymer material and a cushion layer covering its surface. The cushion layer may be, for example, a layer made of the resin foam described in the cushioning material 32 described later.

[0030] The radial length of the core 20 is not particularly limited. If the core 20 is approximately cylindrical, the radial length is the average diameter; if it is approximately cylindrical, the radial length is the average outer diameter. The radial length of the core 20 is, for example, 37 mm or more, preferably 62 mm or more, and also, for example, 215 mm or less, preferably 190 mm or less. The radial length of the core 20 is approximately the same in the axial direction.

[0031] The axial length of the core 20 is greater than or equal to the width of the laminated film 210. In this embodiment, it is longer than the width of the laminated film 210. Therefore, the core 20 has protrusions 201 that project outward from the side surface of the winding body 21 on each of the axial sides.

[0032] The axial length of the core 20 is, for example, 50 mm or more, preferably 100 mm or more, and also, for example, 5000 mm or less, preferably 4000 mm or less. Note that the axial length of the core 20 is the average length of the core 20 in the axial direction.

[0033] In the axial direction, the length of each protrusion 201 of the winding core 20 is, for example, 1 mm or more, preferably 3 mm or more, and for example, 500 mm or less, preferably 400 mm or less. Preferably, the lengths of the protrusions 201 of the winding core 20 are the same on both sides in the axial direction.

[0034] (2) Coiled body The wound body 21 is made by winding the laminated film 210 multiple times.

[0035] In the wound body 21, the number of turns of the laminated film 210 is, for example, 60 turns or more, preferably 70 turns or more, and for example, 7800 turns or less, preferably 7000 turns or less.

[0036] <Laminated film> The laminated film 210 extends in a planar direction perpendicular to the thickness direction. Furthermore, the laminated film 210 is a film that is long in one direction (longitudinal direction) and short in the direction perpendicular to the longitudinal direction (short direction).

[0037] The laminated structure of the laminated film 210 is not particularly limited. The laminated film 210 may, for example, include a resin film 211. Alternatively, the laminated film 210 may include, for example, a metal reflective layer 212. The laminated film 210 may also include both the resin film 211 and the metal reflective layer 212. When the laminated film 210 includes a metal reflective layer 212, the laminated film 210 is a reflective film. A reflective film is used, for example, to suppress light from the backlight of a liquid crystal display device from leaking out of the housing.

[0038] As shown in Figure 2, the laminated film 210 comprises, for example, a resin film 211, a metal reflective layer 212, an inorganic blackening layer 213, a metal oxide layer 214, and a cured resin layer 215, arranged in order toward one side in the thickness direction.

[0039] [Resin film] The resin film 211 supports the other layers in the laminated film 210 (e.g., the metal reflective layer 212, the inorganic blackening layer 213, the metal oxide layer 214, and the cured resin layer 215). The resin film 211 has thickness and a film shape (including a sheet shape) that extends in a planar direction perpendicular to the thickness direction. The resin film 211 is also flexible.

[0040] Examples of materials for the resin film 211 include polyester resin, polyolefin resin, acrylic resin, polycarbonate resin, polyethersulfone resin, polyarylate resin, melamine resin, polyamide resin, polyimide resin, cellulose resin, and polystyrene resin. Polyethylene terephthalate (PET) is an example of a polyester resin. From the viewpoint of heat resistance and mechanical strength, the resin film 211 is preferably a polyester resin film. More preferably, it is a PET film.

[0041] The resin film 211 has voids 221. The presence of voids 221 in the resin film 211 causes light scattering, improving its light reflectivity.

[0042] The cross-sectional shape of the void 221 can be, for example, a substantially circular shape or a substantially elliptical shape. The maximum length of the void 221 (or, if the cross-sectional shape of the void 221 is substantially circular, the diameter) is, for example, 0.01 μm or more, preferably 0.1 μm or more, and also, for example, 10 μm or less, preferably 5 μm or less.

[0043] The area ratio of voids 221 in the cross-section of the resin film 211 is, for example, 1% or more, 5% or more, and, for example, 50% or less, preferably 20% or less.

[0044] The maximum length of void 221 and the area ratio of void 221 can be determined by analyzing images of the cross-section of the resin film 211 obtained by transmission electron microscopy (TEM).

[0045] Furthermore, the resin film 211 may contain, for example, particles 222. If the resin film 211 contains particles 222, light scattering will occur even more, improving light reflectivity. However, the resin film 211 does not necessarily have to contain particles 222.

[0046] Examples of particles 222 in the resin film 211 include inorganic particles. Examples of materials for the inorganic particles include titanium dioxide, calcium carbonate, barium sulfate, silica, and talc. Titanium dioxide is preferred. In other words, the particles 222 in the resin film 211 are preferably titanium dioxide particles. Furthermore, the particles 222 may consist of a single particle or two or more types of particles may be used in combination.

[0047] The shape of the particles 222 in the resin film 211 can be, for example, approximately spherical. The average particle diameter (D50) of the particles 222 in the resin film 211 is, for example, 0.05 μm or more, preferably 0.1 μm or more, and also, for example, 2 μm or less, preferably 1 μm or less. The average particle diameter (D50) of the particles in the resin film 211 is the median diameter (particle size at which the volume cumulative frequency from the smallest diameter side reaches 50%) in the volume-based particle size distribution, and can be determined, for example, based on the particle size distribution obtained by laser diffraction-scattering.

[0048] If the resin film 211 contains particles 222, the content of particles 222 in the resin film 211 is, for example, 5% by volume or more, preferably 10% by volume or more, and for example, 50% by volume or less, preferably 40% by volume or less.

[0049] The proportion of particles 222 in the resin film 211 can be determined by analyzing images of the cross-section of the resin film 211 obtained using a transmission electron microscope (TEM).

[0050] The resin film 211 having the voids 221 and / or particles 222 described above is a white resin film. In other words, the resin film 211 is preferably a white PET film.

[0051] The total light transmittance of the resin film 211 is, for example, less than 50%, preferably 40% or less, more preferably 30% or less, even more preferably 20% or less, and also, for example, 1% or more, preferably 5% or more. The total light transmittance of the resin film 211 can be calculated by measuring the spectrum at wavelengths of 380 nm to 780 nm using a spectrophotometer (U4100, manufactured by Hitachi High-Tech Science Corporation).

[0052] A resin film 211 (white resin film) having a total light transmittance within the above range is more prone to indentations on the surface of the laminated film 210 compared to a transparent resin film (for example, a resin film with a total light transmittance of 80% or more).

[0053] The thickness of the resin film 211 is, for example, 5 μm or more, preferably 10 μm or more, and more preferably 20 μm or more, from the viewpoint of the mechanical strength of the laminated film 210, and from the viewpoint of ease of handling, for example, 300 μm or less, preferably 200 μm or less, and more preferably 150 μm or less. The thickness of the resin film 211 can be measured, for example, using a film thickness gauge.

[0054] In the resin film 211, the surface on which the metal reflective layer 212 is placed (one surface in the thickness direction) may be surface-modified to improve the adhesion between the resin film 211 and the metal reflective layer 212. Examples of surface modification treatments include corona treatment, plasma treatment, ozone treatment, primer treatment, glow treatment, and coupling agent treatment.

[0055] [Metal reflective layer] The metal reflective layer 212 is positioned on one side of the resin film 211 in the thickness direction. That is, the metal reflective layer 212 is in contact with one side of the resin film 211 in the thickness direction.

[0056] The metal reflective layer 212 is formed from a metal that has light reflectivity. Examples of metals that form the metal reflective layer 212 include aluminum (Al), silver (Ag), titanium (Ti), and alloys thereof. From the viewpoint of improving the light reflectivity of the metal reflective layer 212 for visible light, aluminum and silver are preferred. In other words, the metal reflective layer 212 is preferably an aluminum layer and a silver layer.

[0057] The thickness of the metal reflective layer 212 is, for example, 10 nm or more, preferably 30 nm or more, from the viewpoint of improving the light reflectivity of the metal reflective layer 212, and, for example, 500 nm or less, preferably 300 nm or less, from the viewpoint of improving the adhesion of the metal reflective layer 212 to the resin film 211.

[0058] [Inorganic Blackening Layer] The inorganic blackening layer 213 is positioned on one side in the thickness direction of the metal reflective layer 212. That is, the inorganic blackening layer 213 is in contact with one side in the thickness direction of the metal reflective layer 212.

[0059] The inorganic blackening layer 213 is an inorganic layer with high light absorption. The inorganic blackening layer 213 includes, for example, a metal compound and an elemental metal. Preferably, it consists of a metal compound and an elemental metal. The inorganic blackening layer 213 may contain multiple metal compounds or multiple elemental metals.

[0060] Metallic compounds are compounds of metals and nonmetals. Examples of metallic compounds include metal oxides, metal nitrides, metal carbides, and metal hydroxides. Preferably, metal oxides are used. Examples of the metal (first metal) in a metallic compound include indium (In), copper (Cu), molybdenum (Mo), and iron (Fe). Preferably, the compound contains at least one selected from the group consisting of In and Cu. In other words, preferred metallic compounds include indium oxide and copper oxide. The first metal may be used alone or in combination of two or more.

[0061] Examples of elemental metals (secondary metals) include In, Cu, Mo, and Fe. The secondary metal preferably contains Cu, and more preferably consists of Cu. The secondary metal may be used alone or in combination of two or more.

[0062] The first and second metals may be the same or different.

[0063] The proportion of the first metal in the inorganic blackened layer 213 is, for example, 10 atomic% or more, preferably 20 atomic% or more, and also, for example, 90 atomic% or less, preferably 80 atomic% or less, from the viewpoint of achieving high light-shielding properties of the inorganic blackened layer 213. The proportion of the second metal in the inorganic blackened layer 213 is, for example, 10 atomic% or more, preferably 20 atomic% or more, and also, for example, 90 atomic% or less, preferably 80 atomic% or less, from the viewpoint of achieving high light-shielding properties of the inorganic blackened layer 213.

[0064] From the viewpoint of achieving high light-shielding properties of the inorganic blackening layer 213, the inorganic blackening layer 213 is, for example, a layer containing a metal compound and an elemental metal. Preferably, it is a layer containing a metal oxide and an elemental metal. More preferably, it is a layer containing indium oxide and copper.

[0065] The thickness of the inorganic blackening layer 213 is, for example, 5 nm or more, preferably 10 nm or more, from the viewpoint of improving the light-shielding properties of the inorganic blackening layer 213, and, for example, 300 nm or less, preferably 200 nm or less, from the viewpoint of improving the adhesion of the inorganic blackening layer 213 to the metal reflective layer 212.

[0066] The luminous transmittance (Y value) of the inorganic blackening layer 213 at wavelengths of 380 nm to 780 nm in the CIE-XYZ color system is, for example, 0.1% or less, preferably 0.05% or less, more preferably 0.03% or less, and also, for example, 0.001% or more. The luminous transmittance can be measured, for example, by a spectrophotometer (product name: U-4100, manufactured by Hitachi High-Tech Science Corporation).

[0067] [Metal oxide layer] The metal oxide layer 214 is positioned on one side in the thickness direction of the inorganic blackening layer 213. That is, the metal oxide layer 214 is in contact with the inorganic blackening layer 213.

[0068] Examples of metals that can form the metal oxide layer 214 include indium (In), zinc (Zn), tin (Sn), magnesium (Mg), nickel (Ni), cobalt (Co), and chromium (Cr). From the viewpoint of improving the water vapor barrier properties of the metal oxide layer 214, indium tin composite oxide is preferred. In other words, the metal oxide layer 214 is preferably an indium tin oxide (ITO) layer.

[0069] The thickness of the metal oxide layer 214 is, for example, 5 nm or more, preferably 10 nm or more, from the viewpoint of improving the water vapor barrier properties of the metal oxide layer 214, and, for example, 200 nm or less, preferably 150 nm or less, from the viewpoint of improving the adhesion of the metal oxide layer 214 to the inorganic blackening layer 213.

[0070] [Cured resin layer] The cured resin layer 215 is positioned on one side in the thickness direction of the metal oxide layer 214. That is, the cured resin layer 215 is in contact with one side in the thickness direction of the metal oxide layer 214. The cured resin layer 215 is, for example, a hard coat layer (HC layer) to make it difficult for scratches to form on the laminated film 210.

[0071] The cured resin layer 215 is a cured product of a curable resin composition. The curable resin composition contains a curable resin. Examples of curable resins include polyester resin, acrylic urethane resin, acrylic resin (excluding acrylic urethane resin), urethane resin (excluding acrylic urethane resin), amide resin, silicone resin, epoxy resin, and melamine resin. The curable resin may be used alone or in combination of two or more types. From the viewpoint of improving the hardness of the cured resin layer 215, preferably, at least one selected from the group consisting of acrylic urethane resin and acrylic resin is used as the curable resin.

[0072] Examples of curable resins include UV-curable resins and thermosetting resins. UV-curable resins are preferred as curable resins because they can be cured without high-temperature heating, thus improving manufacturing efficiency.

[0073] The curable resin composition may contain particles. In other words, the curable resin layer 215 may contain particles. Examples of particles in the curable resin layer 215 include inorganic oxide particles and organic particles. Examples of materials for inorganic oxide particles include silica, alumina, titania, zirconia, calcium oxide, tin oxide, indium oxide, cadmium oxide, and antimony oxide. Examples of materials for organic particles include polymethyl methacrylate, polystyrene, polyurethane, acrylic-styrene copolymer, benzoguanamine, melamine, and polycarbonate. The particles in the curable resin layer 215 may be used individually or in combination of two or more types.

[0074] Furthermore, the curable resin composition may contain nanoparticles and / or microparticles as particles. In other words, the curable resin layer 215 may contain nanoparticles and / or microparticles as particles. Preferably, the curable resin layer 215 contains nanoparticles and microparticles as particles. Note that each of the nanoparticles and microparticles has an average particle diameter (D50) as described later.

[0075] The average particle size (D50) of nanoparticles in the cured resin layer 215 is, for example, 20 nm or more, preferably 30 nm or more, from the viewpoint of improving the hardness of the cured resin layer 215, and, from the viewpoint of uniform dispersion of particles within the cured resin layer 215, for example, 300 nm or less, preferably 100 nm or less.

[0076] The average particle size (D50) of the microparticles in the cured resin layer 215 is, from the viewpoint of improving the antiblocking properties of the cured resin layer 215, for example, 0.5 μm or more, preferably 1.0 μm or more, more preferably 1.5 μm or more, even more preferably 2.0 μm or more, particularly preferably 2.5 μm or more, or, for example, 10 μm or less, preferably 6.0 μm or less, more preferably 5.0 μm or less, even more preferably 4.0 μm or less, particularly preferably 3.5 μm or less. Note that the average particle size (D50) of the microparticles in the cured resin layer 215 may be greater than the thickness of the cured resin layer 215. Preferably, it is greater than the thickness of the cured resin layer 215.

[0077] The average particle size (D50) of particles (nanoparticles and microparticles) in the cured resin layer 215 is the median diameter (the particle size at which the volume cumulative frequency reaches 50% from the smallest diameter side) in the volume-based particle size distribution, and can be determined, for example, based on the particle size distribution obtained by the laser diffraction-scattering method.

[0078] When the cured resin layer 215 contains nanoparticles, the proportion of particles in the cured resin layer 215 is, for example, 10% by volume or more, preferably 20% by volume or more, from the viewpoint of improving the hardness of the cured resin layer 215, and, from the viewpoint of uniform dispersion of particles within the cured resin layer 215, for example, 90% by volume or less, preferably 80% by volume or less.

[0079] The nanoparticle content in the cured resin layer 215 can be determined by analyzing cross-sectional images of the cured resin layer 215 obtained using a transmission electron microscope (TEM).

[0080] When the cured resin layer 215 contains microparticles, the content of microparticles per 100 parts by mass of curable resin is, for example, 0.1 parts by mass or more, preferably 0.3 parts by mass or more, more preferably 0.6 parts by mass or more, even more preferably 0.8 parts by mass or more, particularly preferably 0.9 parts by mass or more, or, for example, 10 parts by mass or less, preferably 5.0 parts by mass or less, more preferably 3.0 parts by mass or less, even more preferably 1.5 parts by mass or less, particularly preferably 1.2 parts by mass or less.

[0081] The thickness of the cured resin layer 215 is, for example, 0.1 μm or more, preferably 0.5 μm or more, from the viewpoint of improving the abrasion resistance of the cured resin layer 215, and for example, 5 μm or less, preferably 3 μm or less, from the viewpoint of improving the adhesion of the cured resin layer 215 to the metal oxide layer 214.

[0082] The laminated film 210 may also include layers other than the metal reflective layer 212, inorganic blackening layer 213, metal oxide layer 214, and cured resin layer 215 described above. Examples of other layers include an antiblocking layer and an optical adjustment layer.

[0083] The length of the laminated film 210 in the longitudinal direction is not particularly limited, and is, for example, 50m to 5320m. The length of the laminated film 210 in the width direction is, for example, 5mm or more, preferably 100mm or more, and also, for example, 5000mm or less, preferably 4000mm or less. The thickness of the laminated film 210 is, for example, 5μm or more, preferably 10μm or more, and also, for example, 300μm or less, preferably 150μm or less.

[0084] The luminous reflectance (Y value) of the laminated film 210 at wavelengths of 380 nm to 780 nm in the CIE-XYZ color system is, for example, 80% or more, preferably 85% or more, and for example, 100% or less. The luminous reflectance (Y value) of the laminated film 210 is defined as the reflectance of light irradiated onto the laminated film 210 from the resin film 211 side (the other side in the thickness direction).

[0085] The luminous transmittance (Y value) of the laminated film 210 at wavelengths of 380 nm to 780 nm in the CIE-XYZ color system is, for example, 0.10% or less, preferably 0.05% or less, and for example, 0.001% or more. The luminous transmittance (Y value) of the laminated film 210 is defined as the transmittance of light irradiated onto the laminated film 210 from the resin film 211 side (the other side in the thickness direction).

[0086] (3) Adhesive member An adhesive member (not shown) attaches one longitudinal end of the laminated film 210 to the outer surface of the core 20. The roll body 2 includes the adhesive member between the laminated film 210 and the outer surface of the core 20. The outer surface of the core 20 refers to the radially outer surface.

[0087] Specifically, the adhesive member attaches one longitudinal end of the laminated film 210 to the outer surface of the core 20 such that the center of the laminated film 210 and the center of the core 20 substantially coincide in the axial direction. As a result, the protruding portion 201 of the core 20 is the same length on both sides in the axial direction. Furthermore, the adhesive member attaches one longitudinal end of the laminated film 210 to the outer surface of the core 20 such that the width direction of the laminated film 210 and the axial direction of the core 20 are substantially parallel.

[0088] In this embodiment, the laminated film 210 is attached to the outer surface of the core 20 by an adhesive member such that the cured resin layer 215 side (opposite side of the resin film 211) of one end of the laminated film 210 in the longitudinal direction faces inward. In other words, the outer surface of the core 20 and the cured resin layer 215 of the laminated film 210 face each other.

[0089] The joining member is not particularly limited as long as it is one that is commonly used for winding the laminated film 210 into a winding body 21. Examples of joining members include adhesives and double-sided tapes. Preferably, double-sided tapes are used. The adhesives and double-sided tapes are not particularly limited as long as they are commonly used for winding the laminated film 210 into a winding body 21. The joining members may be used individually or in combination of two or more types.

[0090] 1.2.Cushioning material The cushioning material 3 prevents the packaging material 4 from coming into contact with the winding body 21. Therefore, it can reduce indentations on the surface of the laminated film 210. In addition, the cushioning material 3 protects the winding body 21 from the side plate 5. Therefore, it can reduce indentations on the edges of the laminated film 210.

[0091] The cushioning material 3 is fixed to the core 20 on both sides of the core 20 in the axial direction. In other words, the packaging body 1 comprises multiple cushioning materials 3. In this embodiment, one cushioning material 3 is placed on one side in the axial direction, and one cushioning material 3 is placed on the other side in the axial direction. The cushioning material 3 is placed between the winding body 21 and the side plate 5.

[0092] The cushioning material 3 includes a fixing portion 30 that can be fixed to the core 20. The fixing portion 30 is, for example, located in the center of the cushioning material 3 in the radial direction. As an example of the fixing portion 30 of the cushioning material 3, if the core 20 has a protrusion 201, a through hole into which the protrusion 201 can be inserted may be provided. In this embodiment, as shown in Figure 1B, the cushioning material 3 includes a through hole (fixing portion 30) into which the protrusion 201 of the core 20 can be inserted. Note that, if the core 20 has a protrusion 201, the fixing portion 30 of the cushioning material 3 may also be a recess into which the protrusion 201 can be inserted.

[0093] When the cushioning material 3 has a through hole as a fixing part 30, the shape of the through hole, as viewed from the axial direction, is, for example, approximately circular. The diameter of the through hole (in other words, the inner diameter of the cushioning material 3) is greater than or equal to the radial length of the core 20. Preferably, it is the same as the radial length of the core 20. The diameter of the through hole is, for example, 37 mm or more, preferably 62 mm or more, and also, for example, 215 mm or less, preferably 190 mm or less.

[0094] In the radial direction of the core 20, the cushioning material 3 has an overhang portion 31 that extends beyond the outside of the winding body 21. In other words, in the radial direction, the length of at least a portion of the cushioning material 3 is longer than the diameter of the roll body 2. The overhang portion 31 is a region of the cushioning material 3 that does not overlap with the winding body 21 when projected in the axial direction.

[0095] In the radial direction, if the cushioning material 3 has an overhang portion 31 that extends beyond the outside of the winding body 21, contact between the packaging material 4 and the winding body 21 can be suppressed. Therefore, the indentations on the surface of the laminated film 210 can be reduced.

[0096] Preferably, the cushioning material 3 has an overhang portion 31 that extends beyond the outside of the winding body 21 over its entire radial length. In other words, over its entire radial length, the cushioning material 3 is longer than the diameter of the roll body.

[0097] The external shape of the cushioning material 3, as viewed from the axial direction, is not particularly limited as long as it has an overhang 31. Examples of the external shape of the cushioning material 3, as viewed from the axial direction, include a roughly circular shape, a roughly rectangular shape, a roughly cross-shaped shape, and a roughly I-shaped shape. In this embodiment, the external shape of the cushioning material 3, as viewed from the axial direction, is roughly circular. When the external shape of the cushioning material 3 is roughly circular, the overhang 31 has a roughly annular shape.

[0098] In other words, the shape of the cushioning material 3 is not particularly limited, and examples include a roughly cylindrical shape and a roughly rectangular prism shape. In this embodiment, the shape of the cushioning material 3 is a roughly cylindrical shape (roughly cylindrical shape) with a through hole.

[0099] The radial length of the cushioning material 3 is, for example, 20 mm to 800 mm, preferably 50 mm to 600 mm, more preferably 80 mm to 500 mm, and even more preferably 100 mm to 500 mm.

[0100] The radial length of the cushioning material 3 is, for example, 20 mm or more, preferably 50 mm or more, more preferably 80 mm or more, even more preferably 100 mm or more, and also, for example, 800 mm or less, preferably 600 mm or less, and more preferably 500 mm or less.

[0101] The maximum radial length of the cushioning material 3 is longer than the diameter of the roll body 2. The maximum radial length of the cushioning material 3 is adjusted as appropriate within the above range. In this embodiment, the maximum radial length of the cushioning material 3 is the outer diameter.

[0102] The minimum radial length of the cushioning material 3 is not particularly limited and may be longer than the diameter of the roll body 2, the same as the diameter of the roll body 2, or shorter than the diameter of the roll body 2. Preferably, it is longer than the diameter of the roll body 2. The minimum radial length of the cushioning material 3 is adjusted as appropriate within the above range. In this embodiment, the minimum radial length of the cushioning material 3 is the outer diameter, which is longer than the diameter of the roll body 2.

[0103] In this embodiment, since the outer shape of the cushioning material 3, as viewed from the axial direction, is substantially circular, the maximum radial length of the cushioning material 3 and the minimum radial length of the cushioning material 3 are the same. In this embodiment, the outer diameter of the cushioning material 3 is, for example, 50 mm or more, preferably 80 mm or more, more preferably 100 mm or more, and also, for example, 800 mm or less, preferably 600 mm or less, more preferably 500 mm or less.

[0104] In the radial direction, the difference between the distance from the center of the cushioning material 3 at the protruding portion 31 to its outer surface and the distance from the center of the wound body 21 to its outermost surface (distance from the center of the cushioning material 3 at the protruding portion 31 to its outer surface - distance from the center of the wound body 21 to its outermost surface) is, for example, 2 mm to 300 mm, preferably 10 mm to 250 mm, and more preferably 50 mm to 200 mm.

[0105] In the radial direction, the difference between the distance from the center of the cushioning material 3 at the protruding portion 31 to its outer surface and the distance from the center of the wound body 21 to its outermost surface (distance from the center of the cushioning material 3 at the protruding portion 31 to its outer surface - distance from the center of the wound body 21 to its outermost surface) is, for example, 2 mm or more, preferably 10 mm or more, more preferably 50 mm or more, and also, for example, 300 mm or less, preferably 250 mm or less, more preferably 200 mm or less.

[0106] In the radial direction, if the difference between the distance from the center of the cushioning material 3 to the outer surface at the protruding portion 31 and the distance from the center of the winding body 21 to the outermost surface is greater than or equal to the lower limit value, contact between the packaging material 4 and the winding body 21 can be further suppressed. As a result, indentations on the surface of the laminated film 210 can be further reduced.

[0107] In this embodiment, since the outer shape of the cushioning material 3, as viewed from the axial direction, is approximately circular, the distance from the outer surface of the cushioning material 3 at the overhang portion 31 to the outermost surface of the winding body 21 is the same throughout the entire radial direction. Also, in this embodiment, the distance from the center of the winding body 21 to the outermost surface in the radial direction corresponds to the radius of the roll body 2. In other words, in this embodiment, the above difference is the difference between the radius of the cushioning material at the overhang portion 31 (half of the outer diameter) and the radius of the roll body 2 in the radial direction.

[0108] On each of the axial sides of the core 20, the cushioning material 3 is positioned to be in contact with the side surface of the winding body 21.

[0109] Specifically, on each side in the axial direction, the cushioning material 3, except for the protruding portion 31 on its inner surface, is in contact with at least a portion of the outer surface of the wound body 21. In this embodiment, on each side in the axial direction, the cushioning material 3, except for the protruding portion 31 on its inner surface, is in contact with the entire outer surface of the wound body 21. In other words, when projected in the axial direction, the wound body 21 is located inside the cushioning material 3.

[0110] If the cushioning material 3 is positioned to contact the side surface of the winding body 21 on each of the axial sides, the winding body 21 can be protected from the side plate 5, and consequently, the indentation marks on the edges of the laminated film 210 can be reduced.

[0111] In the axial direction, the ratio of the contact area between one outer surface of the winding body 21 and one inner surface of the cushioning material 3 to the total area of ​​one outer surface of the winding body 21 (contact area between one outer surface of the winding body 21 and one inner surface of the cushioning material 3 / total area of ​​one outer surface of the winding body 21 × 100) is, for example, 10% or more, preferably 30% or more, more preferably 50% or more, even more preferably 70% or more, particularly preferably 90% or more, and most preferably 100%. A ratio of 100% indicates that the inner surface of the cushioning material 3 is in contact with the entire outer surface of the winding body 21.

[0112] Examples of the cushioning material 3 include a cushioning material 32 and a plate material 33. The cushioning material 3 may consist of a single layer or multiple layers. Preferably, the cushioning material 3 includes a cushioning material 32. In this embodiment, the cushioning material 3 consists of a single layer of cushioning material 32.

[0113] If the cushioning material 3 includes the cushioning material 32, the wound body 21 can be reliably protected from the side plate 5 on both the axial sides. As a result, indentations at the edges of the laminated film 210 can be reliably reduced.

[0114] Examples of materials for the cushioning material 32 include resin foams made from at least one selected from the group consisting of polyolefin resin, polyester resin, acrylic urethane resin, acrylic resin (excluding acrylic urethane resin), urethane resin (excluding acrylic urethane resin), amide resin, silicone resin, epoxy resin, and melamine resin. Examples of polyolefin resin foams include polyethylene resin foam and polypropylene resin foam. Another example of a material for the cushioning material 32 is foamed rubber. Preferably, the cushioning material 32 is made from polyolefin resin foam. More preferably, it is made from polyethylene resin foam.

[0115] If the cushioning material 32 is made of resin foam or foamed rubber, the cushioning material 32 has voids.

[0116] The tensile strength of cushioning material 32 is 300 N / cm². 2 The following applies: In other words, cushioning material 32 has a tensile strength of 300 N / cm². 2 The following shows cushioning material 3. The tensile strength can be measured according to the method compliant with JIS K-7161 (1999).

[0117] Preferably, the roll body 2 is self-supporting with the cushioning material 3 fixed to the winding core 20. In other words, preferably, the cushioning material 3 can support the roll body 2. More specifically, when the roll body 2 is placed on a horizontal surface such as a stand with the cushioning material 3 fixed to the winding core 20 on each of the axial sides, the roll body 2 can stand on its own due to the cushioning material 3 arranged on each of the axial sides. At this time, the outermost surface of the roll body 2 (the outermost surface of the winding body 21) does not come into contact with the horizontal surface.

[0118] In other words, in this embodiment, the cushioning material 3 consists of a cushioning material 32, and the roll body 2 is self-supporting with the cushioning material 3 (cushioning material 32) fixed to the core 20.

[0119] In the axial direction, the length of the cushioning material 3 (length in the axial direction) is, for example, greater than or equal to the length of the protruding portion 201 of the core 20. In the axial direction, the length of the cushioning material 3 is, for example, 1 mm or more, preferably 3 mm or more, more preferably 5 mm or more, and also, for example, 500 mm or less, preferably 400 mm or less. If the cushioning material 3 consists of multiple layers, the length in the axial direction is the sum of the lengths of each layer.

[0120] If the axial length of the cushioning material 3 is greater than or equal to the lower limit value mentioned above, the indentation marks on the edges of the laminated film 210 can be further reduced.

[0121] In this embodiment, in the axial direction, the length of the cushioning material 3 is the same as the length of the protruding portion 201 of the core 20, and in the axial direction, the outer surface of the cushioning material 3 and the outer surface of the core 20 are flush.

[0122] If the cushioning material 3 includes a cushioning material 32, the axial length of the cushioning material 32 is, for example, 0.1 mm or more, preferably 0.5 mm or more, more preferably 1.0 mm or more, and also, for example, 500 mm or less, preferably 300 mm or less.

[0123] If the cushioning material 3 includes a cushioning material 32, the indentation marks on the edges of the laminated film 210 can be further reduced if the axial length of the cushioning material 32 is greater than or equal to the lower limit value mentioned above.

[0124] When the cushioning material 3 consists of a cushioning material 32, the axial length of the cushioning material 32 is, for example, 40 mm or more, preferably 50 mm or more, more preferably 100 mm or more, and also, for example, 500 mm or less, preferably 300 mm or less.

[0125] If the cushioning material 3 consists of a cushioning material 32, the roll body 2 can stand on its own with the cushioning material 32 fixed to the core 20, provided that the axial length of the cushioning material 32 is greater than or equal to the lower limit value mentioned above.

[0126] 1.3. Packaging materials The packaging material 4 protects the rolled body 21 from light, humidity, and other elements. In other words, the packaging material 4 is a barrier packaging material.

[0127] The packaging material 4 is in the form of a film (including a sheet) having a predetermined thickness. The packaging material 4 extends in a planar direction perpendicular to the thickness direction.

[0128] The packaging material 4 covers the roll body 2 and the cushioning material 3. Specifically, the packaging material 4 covers the entire roll body 2 and the cushioning material 3. The packaging material 4 may cover the roll body 2 and the cushioning material 3 multiple times.

[0129] On each of the axial sides, the packaging material 4 contacts the outer surface of the cushioning material 3. More specifically, on each of the axial sides, the packaging material 4 contacts the entire outer surface of the cushioning material 3. In addition, in this embodiment, on each of the axial sides, the outer surface of the core 20 and the outer surface of the cushioning material 3 are flush, so the packaging material 4 also contacts the outer surface of the core 20.

[0130] In the radial direction, the packaging material 4 is in contact with the protruding portion 31 of the cushioning material 3.

[0131] The packaging material 4 does not come into contact with the winding body 21. Specifically, in the radial direction, the packaging material 4 does not come into contact with the outermost surface of the winding body 21. In other words, in the radial direction, there is a gap between the outermost surface of the winding body 21 and the packaging material 4. Also, in the axial direction, the packaging material 4 does not come into contact with the outer surface of the winding body 21. In other words, in the axial direction, there is a gap between the outer surface of the winding body 21 and the packaging material 4.

[0132] If a gap is provided between the outer surface of the wound body 21 and the packaging material 4 in the radial direction, the indentations on the surface of the laminated film 210 can be reduced.

[0133] In the radial direction, the distance between the outermost surface of the wound body 21 and the packaging material 4 is, for example, 2 mm to 300 mm, preferably 10 mm to 250 mm, and more preferably 50 mm to 200 mm.

[0134] In the radial direction, the distance between the outermost surface of the wound body 21 and the packaging material 4 is, for example, 2 mm or more, preferably 10 mm or more, more preferably 50 mm or more, and also, for example, 300 mm or less, preferably 250 mm or less, more preferably 200 mm or less.

[0135] If the distance between the outermost surface of the winding body 21 and the packaging material 4 in the radial direction is greater than or equal to the lower limit value, the indentations on the surface of the laminated film 210 can be reliably reduced. If the distance between the outermost surface of the winding body 21 and the packaging material 4 in the radial direction is less than or equal to the upper limit value, the size of the packaging body 1 can be prevented from becoming excessively large.

[0136] In this embodiment, since the outer shape of the cushioning material 3, as viewed from the axial direction, is substantially circular, the distance between the outermost surface of the winding body 21 and the packaging material 4 is the same throughout the entire radial direction. In other words, in this embodiment, the distance between the outermost surface of the winding body 21 and the packaging material 4 is the same as the difference between the distance from the center of the cushioning material 3 to the outer peripheral surface at the overhang portion 31 and the distance from the center of the winding body 21 to the outermost surface.

[0137] Examples of materials for packaging material 4 include paper, resin, and metal. In other words, examples of packaging material 4 include paper sheets, resin films, and metal films. Preferably, metal is used as the material for packaging material 4. In other words, packaging material 4 is preferably a metal film.

[0138] The materials of packaging material 4 may be used individually or in combination of two or more types. In other words, packaging material 4 may be a single-layer film (sheet) made of paper, resin, or metal, or it may be a multi-layer film (sheet) made by combining these.

[0139] Examples of resins include polyolefin resins (e.g., polyethylene resins and polypropylene resins), polyester resins, polycarbonate resins, polyphenylene ether resins, polyacetal resins, polystyrene resins, polyvinyl chloride resins, polyvinyl acetate resins, polyamide resins (e.g., nylon), epoxy resins, and urethane resins.

[0140] Examples of metals include aluminum, copper, titanium, nickel, and their alloys, as well as stainless steel. Aluminum is preferred. In other words, packaging material 4 is preferably an aluminum film.

[0141] The thickness of the packaging material 4 is, for example, 10 μm or more, preferably 30 μm or more, and for example, 500 μm or less, more preferably 300 μm or less.

[0142] Of the planar length of the packaging material 4, the length in the axial direction should be sufficient to cover the roll body 2 and the cushioning material 3 in the axial direction, and should be at least longer than the axial length of the core 20.

[0143] Of the planar length of the packaging material 4, the length in the direction perpendicular to the axial direction described above should be sufficient in the radial direction to cover the roll body 2 and the cushioning material 3, and should be at least longer than the circumference of the roll body 2. In this embodiment, it is also longer than the circumference of the cushioning material 3.

[0144] 1.4. Side panels The side panel 5 is attached when transporting the package 1, or when storing the package 1.

[0145] The side plates 5 are positioned on both sides of the winding core 20 in the axial direction, on the side opposite the winding body 21 relative to the cushioning material 3. The side plates 5 are positioned such that the winding core 20 is located in the center of the side plates 5 in the radial direction. The side plates 5 are in contact only with the packaging material 4.

[0146] Although not shown in the diagram, side plates 5 are placed on each side in the axial direction, and the side plates 5 on both sides in the axial direction are fixed together with a band. The band presses the side plates 5 inward on each side in the axial direction. Examples of band materials include polypropylene, polyethylene terephthalate, rubber, and cloth.

[0147] When viewed from the axial direction, the external shape of the side plate 5 only needs to be straight in part, for example, roughly rectangular. In other words, the shape of the side plate 5 only needs to be flat in part, for example, roughly rectangular prism shape.

[0148] When projected in the axial direction, the cushioning material 3 is preferably located inside the side plate 5.

[0149] In the radial direction, the maximum length of the side plate 5 (in this embodiment, the diagonal length) is not particularly limited, as long as it is longer than the maximum length of the cushioning material 3. The maximum radial length of the side plate 5 is, for example, 200 mm or more, preferably 400 mm or more, more preferably 600 mm or more, and also, for example, 1200 mm or less, preferably 1000 mm or less.

[0150] In the radial direction, the minimum length of the side plate 5 (in this embodiment, the length of one side) is preferably longer than the maximum length of the cushioning material 3. The minimum radial length of the side plate 5 is, for example, 100 mm or more, preferably 300 mm or more, more preferably 500 mm or more, and also, for example, 1100 mm or less, preferably 900 mm or less.

[0151] Examples of materials for the side plate 5 include resin and metal. Resin is preferred. Examples of resins include polyolefin resin, polyester resin, acrylic urethane resin, acrylic resin (excluding acrylic urethane resin), urethane resin (excluding acrylic urethane resin), amide resin, silicone resin, epoxy resin, and melamine resin. Examples of polyolefin resins include polyethylene resin and polypropylene resin. Examples of metals include iron, aluminum, and stainless steel.

[0152] The packaging body 1 is self-supporting thanks to the side plates 5. In other words, the side plates 5 can support the packaging body 1. More specifically, when the packaging body 1 is placed on a horizontal surface such as a stand with the side plates 5 on both sides in the axial direction fixed together with a band, the packaging body 1 can stand on its own thanks to the side plates 5 positioned on each side in the axial direction. At this time, the packaging material 4 does not come into contact with the aforementioned horizontal surface.

[0153] In the axial direction, the length of the side plate 5 (axial length) is, for example, 10 mm or more, preferably 20 mm or more, and also, for example, 150 mm or less, preferably 100 mm or less.

[0154] 2. Method of manufacturing the packaging An embodiment of the method for manufacturing the packaging body of the present invention will be described with reference to Figures 3A to 4B.

[0155] A method for manufacturing a packaging body includes, for example, a preparation step of preparing a roll body 2, a fixing step of fixing cushioning material 3, a covering step of covering the roll body 2 and cushioning material 3 with packaging material 4, and a placement step of arranging side plates, in that order. Although not shown in the figures, the method for manufacturing a packaging body may further include, if necessary, a degassing step of degassing the roll body 2 and cushioning material 3 covered with packaging material 4 after the covering step and before the placement step.

[0156] 2.1. Preparation process As shown in Figure 3A, in the preparation step, a roll body 2 is prepared, which comprises a winding body 21 having a winding core 20 and a laminated film 210 wound around the winding core 20.

[0157] Specifically, a laminated film 210 is manufactured, and the laminated film 210 is wound onto a core 20 to prepare a roll body 2 that includes a winding body 21 having the laminated film 210.

[0158] The laminated film 210 is manufactured, for example, by a roll-to-roll method.

[0159] For example, in the manufacturing of the laminated film 210, a metal reflective layer 212, an inorganic blackening layer 213, and a metal oxide layer 214 are sequentially formed on one side in the thickness direction of a resin film 211. Specifically, the metal reflective layer 212, the inorganic blackening layer 213, and the metal oxide layer 214 are formed by a dry coating method. Examples of dry coating methods include sputtering and vapor deposition. Sputtering is preferred. In other words, the metal reflective layer 212, the inorganic blackening layer 213, and the metal oxide layer 214 are, for example, dry coated layers, and preferably sputtered layers.

[0160] In the sputtering method, for example, a sputtering deposition apparatus capable of performing the film deposition process using a roll-to-roll method is used. Specifically, in the sputtering method, a sputtering gas (inert gas) is introduced under vacuum conditions into multiple deposition chambers of the sputtering deposition apparatus, and a negative voltage is applied to a target placed on the cathode of each deposition chamber. This generates a glow discharge, ionizing the gas atoms, and these gas ions collide with the target surface at high speed, ejecting the target material from the target surface, and depositing the ejected target material.

[0161] The materials of the respective targets placed on the cathode in each deposition chamber are the material for the metal reflective layer 212, the material for the inorganic blackening layer 213, and the material for the metal oxide layer 214, respectively.

[0162] The conditions for sputter deposition are as follows:

[0163] Examples of sputtering gases include argon, krypton, xenon, and mixtures thereof. Reactive gases (e.g., oxygen) may also be used in combination. The atmospheric pressure in each deposition chamber during sputtering is, for example, 0.02 Pa to 1 Pa. When reactive gases are used in combination, the partial pressure of the reactive gas in each deposition chamber is, for example, 1.0 × 10⁻⁶. -4 Pa~1.0×10-2 The pressure is Pa. Examples of power supplies for applying voltage to the target include DC power supplies, AC power supplies, MF power supplies, and RF power supplies. The absolute value of the discharge voltage during sputtering is, for example, 50V to 500V. The deposition temperature during sputtering is, for example, -20 to 100°C.

[0164] Next, a cured resin layer 215 is formed on one side of the metal oxide layer 214 in the thickness direction. The cured resin layer 215 can be formed by applying the above-mentioned curable resin composition to one side of the metal oxide layer 214 in the thickness direction to form a coating film, and then curing this coating film. If the curable resin composition contains an ultraviolet-curable resin, the coating film is cured by ultraviolet irradiation. If the curable resin composition contains a thermosetting resin, the coating film is cured by heating.

[0165] Examples of methods for applying the cured resin layer 215 include roll coating, kiss roll coating, gravure coating, reverse coating, roll brushing, spray coating, dip roll coating, bar coating, knife coating, air knife coating, curtain coating, lip coating, and die coating. Gravure coating is preferred.

[0166] The cured resin layer 215 may be formed continuously following the sputtering of the metal oxide layer 214, or it may be formed by a separate, independent process.

[0167] In this manner, the laminated film 210 can be manufactured.

[0168] Then, the roll body 2 is manufactured by winding the laminated film 210 onto the core 20.

[0169] The roll body 2 is manufactured, for example, using a slitting machine in a roll-to-roll manner. The slitting machine comprises, for example, a feed roll and a winding roll. Furthermore, when winding the laminated film 210 while cutting it to a predetermined axial length, the slitting machine may also include a cutting section.

[0170] Specifically, first, the laminated film 210 is set on a feed roll that can rotate with a predetermined driving force. Next, one end of the laminated film 210 in the longitudinal direction is attached to a winding roll that can rotate with a predetermined driving force via an adhesive member. The laminated film 210 is attached to the winding roll via an adhesive member so that the hardened resin layer 215 side faces inward at one end of the laminated film 210 in the longitudinal direction. The winding roll is the winding core 20 described above.

[0171] Then, the feed roll and the winding roll are rotated by a predetermined driving force, the laminated film 210 is fed out from the feed roll, and the laminated film 210 is wound up by the winding roll, thereby manufacturing the roll body 2.

[0172] The transport speed of the laminated film 210 from the delivery roll to the winding roll is, for example, 3 m / min or more, preferably 5 m / min or more, and for example, 30 m / min or less, preferably 25 m / min or less.

[0173] During transport, the tension applied to the laminated film 210 is, for example, 20 N / m or more, preferably 30 N / m or more, more preferably 35 N / m or more, and also, for example, 100 N / m or less, preferably 80 N / m or less, more preferably 60 N / m or less.

[0174] 2.2.Fixing process As shown in Figure 3B, in the fixing process, the cushioning material 3 is fixed to the winding core 20 on each of the axial sides of the winding core 20 so as to be in contact with the side surface of the winding body 21.

[0175] Specifically, the cushioning material 3 is fixed by inserting the protruding portion 201 of the winding core 20 into the fixing portion 30 (through hole) of the cushioning material 3 on both sides in the axial direction. Then, in the axial direction, the inner surface of the cushioning material 3 is brought into contact with the outer surface of the winding body 21.

[0176] In this case, at least a portion of the cushioning material 3 protrudes radially beyond the winding body 21. In other words, in the radial direction of the winding core 20, the cushioning material 3 has a protruding portion that extends beyond the winding body 21.

[0177] 2.3. Coating process As shown in Figure 4A, in the covering process, the roll body 2 and cushioning material 3 are covered with the packaging material 4.

[0178] Specifically, first, the packaging material 4 is prepared, and the packaging material 4 is wrapped around the outer surface of the cushioning material 3, thereby covering both the outer surface of the cushioning material 3 and the outermost surface of the roll body 2. At this time, a gap is maintained between the outermost surface of the winding body 21 and the packaging material 4 in the radial direction. Then, on both sides in the axial direction, the packaging material 4 is folded in so as to cover the outer surface of the cushioning material. In this way, the roll body 2 and the cushioning material 3 are covered by the packaging material 4.

[0179] Although not shown in the diagram, the ends of the packaging material 4 wrapped around the outer surface of the cushioning material 3 may be covered with tape or the like to prevent the packaging material 4 from coming off. Also, the folded axial ends of the packaging material 4 may be partially folded into the cylindrical core 20, or they may not be folded into the core 20 and may be covered with tape or the like.

[0180] 2.4. Degassing process Although not shown in the diagram, the degassing process involves degassing the roll body 2 and cushioning material 3 covered with the packaging material 4. More specifically, a vacuum pump or the like is used to degass the roll body 2 and cushioning material 3 covered with the packaging material 4.

[0181] Even after degassing, a gap remains between the outermost surface of the wound body 21 and the packaging material 4 in the radial direction.

[0182] The degassing process reduces the moisture content within the roll body 2 and cushioning material 3 covered by the packaging material 4, thereby suppressing moisture absorption by the wound body 21.

[0183] 2.5. Placement process As shown in Figure 4B, in the arrangement process, on each of the axial sides of the core 20, the side plates 5 are placed on the opposite side of the winding body 21 from the cushioning material 3.

[0184] Specifically, first, prepare the side plates 5, and on each side in the axial direction, place the side plates 5 on the opposite side of the winding body 21 relative to the cushioning material 3. Next, use a band (not shown) to secure the side plates 5 on both sides in the axial direction. At this time, the side plates 5 will be in contact with the packaging material 4.

[0185] Based on the above, packaging 1 is manufactured.

[0186] 3. Effects (1) The packaging body 1 is provided with cushioning material 3 between the winding body 21 and the side plate 5 on both sides of the axial direction of the winding core 20. This reduces the indentation marks on the edges of the laminated film 210 that forms the winding body 21. In addition, in the radial direction of the winding core 20, the cushioning material 3 has an overhang portion 31 that extends beyond the outside of the winding body 21. In the radial direction of the winding core 20, there is a gap between the outermost surface of the winding body 21 and the packaging material 4. This reduces the indentation marks on the surface of the laminated film 210 that forms the winding body 21.

[0187] (2) In the packaging 1, if the laminated film 210 comprises a resin film 211, and the transmittance of the resin film 211 is less than 50%, and / or the resin film 211 has voids, then indentations are relatively likely to occur on the surface of the laminated film 210. Even with such a resin film 211, the above-described packaging 1 can reduce indentations on the surface of the laminated film 210.

[0188] (3) In the packaging body 1, the packaging material 4 is an aluminum film. Therefore, the rolled body 21 can be protected from light and humidity.

[0189] (4) In the packaging body 1, the length of the cushioning material 3 is longer than the diameter of the roll body 2 over the entire radial area of ​​the core 20. Therefore, a gap can be more reliably maintained between the outermost surface of the winding body 21 and the packaging material 4. As a result, indentations on the surface of the laminated film 210 forming the winding body 21 can be reliably reduced.

[0190] (5) In the packaging body 1, the cushioning material 3 consists of a cushioning material 32, and the roll body 2 is self-supporting with the cushioning material 3 fixed to the winding core 20. Therefore, the indentations on the surface and edges of the laminated film 210 that forms the winding body 21 can be further reduced.

[0191] (6) The method for manufacturing the packaging includes a fixing step of fixing the cushioning material 3 to the core 20 on both sides of the axial direction of the core 20 so as to contact the side surface of the winding body 21. As a result, a packaging 1 can be manufactured that can reduce indentations on the edges of the laminated film 210 forming the winding body 21. Furthermore, in the radial direction of the core 20, the cushioning material 3 has an overhang portion 31 that extends beyond the outside of the winding body 21. And, in the radial direction of the core 20, there is a gap between the outermost surface of the winding body 21 and the packaging material 4. As a result, a packaging 1 can be manufactured that can reduce indentations on the surface of the laminated film 210 forming the winding body 21.

[0192] 4. Variations In the modified examples, components and processes similar to those in the first embodiment are given the same reference numerals, and their detailed descriptions are omitted. Furthermore, the modified examples can achieve the same effects and advantages as the first embodiment, unless otherwise specified. Moreover, the first embodiment and its modified examples can be combined as appropriate.

[0193] 4.1. First Variation In one embodiment of the packaging 1 described above, the cushioning material 3 consists of a single layer of cushioning material 32, but is not limited to this.

[0194] Specifically, as shown in Figure 5, the cushioning material 3 may consist of multiple layers of cushioning material 32 and plate material 33. Preferably, in the axial direction, the cushioning material 3 has cushioning material 32 on the inside (winding body 21 side) and plate material 33 on the outside.

[0195] Examples of materials for the plate material 33 include resins and metals. Resins are preferred. Examples of resins include polyolefin resins, polyester resins, acrylic urethane resins, acrylic resins (excluding acrylic urethane resins), urethane resins (excluding acrylic urethane resins), amide resins, silicone resins, epoxy resins, and melamine resins. Examples of polyolefin resins include polyethylene resins and polypropylene resins.

[0196] The plate material 33 has, for example, a solid structure. That is, the plate material 33 is made of, for example, a solid resin and / or a solid metal. Alternatively, the plate material 33 may be a resin foam made of at least one selected from the group of resins mentioned above. A polyolefin resin foam is preferred as the resin foam. Examples of polyolefin resin foams include polyethylene resin foam and polypropylene resin foam. A polypropylene resin foam is preferred.

[0197] The tensile strength of plate material 33 is 300 N / cm². 2 Larger. In other words, plate material 33 has a tensile strength of 300 N / cm². 2 A larger cushioning material 3 is shown. The tensile strength can be measured according to the method compliant with JIS K-7161 (1999).

[0198] In the first modified example, the cushioning material 3 consists of a cushioning material 32 and a plate material 33, and the roll body 2 is self-supporting with the cushioning material 3 (cushioning material 32 and plate material 33) fixed to the core 20.

[0199] If the cushioning material 3 includes a plate material 33, the axial length of the plate material 33 is, for example, 3 mm or more, preferably 5 mm or more, more preferably 10 mm or more, and also, for example, 500 mm or less, preferably 400 mm or less.

[0200] If the axial length of the plate material 33 is greater than or equal to the lower limit value mentioned above, the roll body 2 can stand on its own with the cushion material 32 and plate material 33 fixed to the winding core 20, regardless of the axial length of the cushion material 32.

[0201] Furthermore, in the above embodiment, the outer shape of the cushioning material 3, when viewed from the axial direction, is approximately circular, but in the first modified example, the outer shape of the cushioning material 3, when viewed from the axial direction, is approximately rectangular.

[0202] In other words, in the first modification, the shape of the cushioning material 3 is a roughly rectangular prism shape (rectangular tube shape) with a through hole.

[0203] In the first modification, the maximum radial length of the cushioning material 3 corresponds to the length of its diagonal. Also, in the first modification, the minimum radial length of the cushioning material 3 corresponds to the length of one side. In other words, in the first modification, the maximum radial length of the cushioning material 3 is longer than the minimum radial length of the cushioning material 3.

[0204] 4.2. Second Variation In one embodiment of the packaging body 1 described above, the outer shape of the cushioning material 3, when viewed from the axial direction, is approximately circular. However, the outer shape of the cushioning material 3 is not particularly limited as long as it has an overhang portion 31. In the second modified example, the outer shape of the cushioning material 3, when viewed from the axial direction, is approximately cross-shaped.

[0205] In the second modification, the maximum radial length of the cushioning material 3 corresponds to the length of the diagonal at the protruding portion. Also, in the second modification, the minimum radial length of the cushioning material 3 corresponds to the length of the diagonal at the intersection. In other words, in the second modification, the maximum radial length of the cushioning material 3 is longer than the minimum radial length of the cushioning material 3.

[0206] 4.3. Third Variation In one embodiment of the packaging body 1 described above, the outer shape of the cushioning material 3, when viewed from the axial direction, is approximately circular. However, as long as the cushioning material 3 has an overhang portion 31, its outer shape is not particularly limited. In the third modified example, the outer shape of the cushioning material 3, when viewed from the axial direction, is approximately I-shaped.

[0207] In the third modified example, the maximum radial length of the cushioning material 3 corresponds to the distance from the corner of one protruding portion to the corner of the other protruding portion opposite to the fixing portion 30. In this case, the distance from the corner of one protruding portion to the corner of the other protruding portion opposite to the fixing portion 30 does not have to be continuous. Also, in the third modified example, the minimum radial length of the cushioning material 3 corresponds to the shorter of the distances between the opposing sides via the fixing portion 30. In other words, in the third modified example, the maximum radial length of the cushioning material 3 is longer than the minimum radial length of the cushioning material 3.

[0208] 4.4. Fourth Variation In one embodiment of the packaging body 1 described above, the cushioning material 3 has a through hole into which the protruding portion 201 can be inserted as a fixing portion 30, but is not limited to this.

[0209] Specifically, although not shown in the figures, if the core 20 is cylindrical and does not have a protruding portion 201, the cushioning material 3 may have a fixing portion 30 that protrudes inward in the axial direction and can be inserted into the core 20.

[0210] When the cushioning material 3 has a projection as a fixing part 30, the shape of the projection, as viewed from the axial direction, is the same as the shape of the core 20 and is substantially circular. The diameter of the projection is less than or equal to the inner diameter of the core 20. Preferably, it is the same as the inner diameter of the core 20. The diameter of the projection is, for example, 25 mm or more, preferably 50 mm or more, and also, for example, 203 mm or less, preferably 178 mm or less.

[0211] Furthermore, in the axial direction, the ratio of the length of the projection to the length of the core 20 (length of projection / length of core 20 × 100) is, for example, 1% or more, preferably 5% or more, and also, for example, 30% or less, preferably 20% or less. In the axial direction, the length of the projection is, for example, 1 mm or more, preferably 5 mm or more, and also, for example, 2500 mm or less, preferably 2000 mm or less. [Examples]

[0212] The present invention will be further described below with reference to examples, comparative examples, and reference examples. However, the present invention is not limited to the examples, comparative examples, and reference examples. Furthermore, specific numerical values ​​such as blending ratios (content ratios), physical properties, and parameters used in the following description may be replaced with the upper limits (numerical values ​​defined as "less than or equal to" or "less than") or lower limits (numerical values ​​defined as "greater than or equal to" or "greater than") of the corresponding blending ratios (content ratios), physical properties, and parameters described in the "Modes for Carrying Out the Invention" above.

[0213] Example 1 (preparation process) First, a long-length resin film of white polyethylene terephthalate (PET) film (product name: Lumirror E20, thickness 38 μm, manufactured by Toray Industries, Inc.) was prepared. The white PET film contains voids and titanium dioxide particles. The total light transmittance of the white PET film was 15.4%. The total light transmittance was calculated by measuring the spectrum at wavelengths of 380 nm to 780 nm using a spectrophotometer (U4100, manufactured by Hitachi High-Tech Science Corporation).

[0214] Next, a metal reflective layer, an inorganic blackening layer, and a metal oxide layer were formed in this order on one side of the PET film in the thickness direction using the sputtering method. A roll-to-roll sputtering apparatus (DC magnetron sputtering apparatus) was used to form the metal reflective layer, the inorganic blackening layer, and the metal oxide layer. The sputtering apparatus comprises a delivery chamber, a first deposition chamber, a second deposition chamber, a third deposition chamber, and a winding chamber. The delivery chamber is equipped with a delivery roll. A roll of the above-mentioned resin film (white PET film) was set on the delivery roll as the work film. The winding chamber is equipped with a winding roll that can wind the work film. In the first to third deposition chambers, the deposition process can be carried out while the work film is driven from the delivery chamber to the winding chamber using a roll-to-roll method.

[0215] In the sputtering deposition process, the first sputtering deposition was performed in the first deposition chamber, the second sputtering deposition in the second deposition chamber, and the third sputtering deposition in the third deposition chamber in sequence. After that, the work film (substrate film / metal reflective layer / inorganic blackening layer / metal oxide layer) was wound onto a winding roll in the winding chamber. In the first sputtering deposition, a 75 nm thick metal reflective layer (Al) was formed on one side in the thickness direction of the white PET film. In the subsequent second sputtering deposition, an inorganic blackening layer (In2O3+Cu) with a thickness of 50 nm was formed on one side in the thickness direction of the metal reflective layer. Then, in the subsequent third sputtering deposition, a metal oxide layer (ITO) with a thickness of 20 nm was formed on one side in the thickness direction of the inorganic blackening layer. Each sputtering deposition was performed as follows:

[0216] In the first sputtering deposition process, the sputtering deposition apparatus (delivery chamber, first to third deposition chambers, winding chamber) was evacuated, and argon (Ar) was introduced as the sputtering gas into the first deposition chamber, setting the atmospheric pressure inside the first deposition chamber to 0.3-0.4 Pa. An aluminum (Al) target (manufactured by Mitsui Mining & Smelting Co., Ltd.) was used as the target. A DC power supply was used to apply voltage to the target. The deposition temperature (temperature of the resin film on which the Al layer was laminated) was set to 40°C. The type of power supply and deposition temperature were the same for the second and third sputtering deposition processes.

[0217] In the second sputtering deposition process, after evacuating the sputtering deposition apparatus described above, Ar was introduced as the sputtering gas into the second deposition chamber, and the atmospheric pressure inside the second deposition chamber was set to 0.3-0.4 Pa. A black inorganic target (product name: DIABLA12, a mixed target of indium oxide (In2O3) and copper (Cu), with an In content of 67.3 (±3) mass%, manufactured by Mitsubishi Materials Corporation) was used as the target.

[0218] In the third sputtering deposition process, after evacuating the sputtering deposition apparatus described above, Ar was introduced as the sputtering gas into the third deposition chamber, and the atmospheric pressure inside the third deposition chamber was set to 0.3-0.4 Pa. An ITO target (a composite oxide of indium oxide and tin oxide, with a tin oxide concentration of 10% by mass, manufactured by Mitsui Mining & Smelting Co., Ltd.) was used as the target.

[0219] Next, a curable resin composition was applied to one side of the inorganic blackening layer in the thickness direction by gravure coating to form a coating film. The curable resin composition contains ultraviolet-curable acrylic urethane resin (product name: Aicatron Z-878-16L, manufactured by Aica Kogyo Co., Ltd.), microparticles (product name: SSX103, cross-linked polymethacrylate particles, average particle size (D50) 3.0 μm, manufactured by Sekisui Chemical Co., Ltd.), and methyl ethyl ketone as a solvent. After drying the coating film, it was cured by ultraviolet irradiation to form a hard coat layer (HC layer) with a thickness of 1 μm.

[0220] The laminated film was fabricated as described above. The laminated film has a laminated structure consisting of a resin film (white PET film, 38 μm thick), a metal reflective layer (Al, 75 nm thick), an inorganic blackening layer (In2O3+Cu, 50 nm thick), a metal oxide layer (ITO, 20 nm thick), and an HC layer (1 μm thick).

[0221] Next, one end of the resulting laminated film in the longitudinal direction was attached to a core and wound up using a slitting machine. The slitting machine comprises a feed roll and a winding roll (core).

[0222] Specifically, first, a laminated film processed to a width of 330 mm was set on the delivery roll. Next, a cylindrical winding core (cushioned ABS core, manufactured by Hiroho Co., Ltd.) with an outer diameter of 91.2 mm and an axial length of 342 mm was prepared as a winding roll. Then, one end of the laminated film in the longitudinal direction was attached to the outer surface of the winding core using double-sided tape (No. 5600, manufactured by Nitto Denko Co., Ltd.) so that the HC layer side of the laminated film was facing inward. Then, with a tension of 40 N / m applied to the laminated film, 200 m of laminated film was wound onto the winding core at a conveying speed of 18 m / min. In this way, a roll body was obtained. The roll body comprises a wound laminated film and a winding core. The diameter of the roll body was 136 mm. Furthermore, on each axial side, the winding core had protrusions that projected outward from the side of the wound film, and the axial length of each protrusion was 6 mm.

[0223] (Fixed process) A cushioning material was fixed to the core so as to contact the side surface of the winding body on both sides of the axial direction.

[0224] Specifically, two pieces of cushioning material (made of polyethylene (PE)) were prepared as cushioning material. Each piece had a roughly circular outer shape, a diameter of 280 mm (in Table 1, the radial length is indicated as 280 mmφ; the same applies hereafter), and an axial length of 55 mm. Since the diameter of the cushioning material is larger than the diameter of the roll, the cushioning material has an overhang. The difference between the distance from the center of the cushioning material at the overhang to the outer surface and the distance from the center of the winding to the outermost surface is 72 mm. The cushioning material also has a through hole in the radial center to serve as a fixing point. The diameter of the through hole in the cushioning material is the same as the outer diameter of the winding core. Table 1 shows whether or not there is an overhang.

[0225] The core was then fixed by inserting its protruding portion into the through-hole in the cushioning material on both sides of the axial direction. When the roll body was placed on the horizontal surface of the support frame with the cushioning material fixed to the core on both sides of the axial direction, the roll body was supported by the protruding portions of the cushioning material on both sides of the axial direction, allowing the roll body to stand on its own. At this time, the outermost surface of the roll body (the outermost surface of the winding body) did not come into contact with the aforementioned horizontal surface. Table 1 shows whether or not the roll body was self-supporting.

[0226] (Coating process) Next, the roll and the cushioning material (the roll with the cushioning material attached) were covered with packaging material.

[0227] Specifically, a 94 μm thick aluminum film was prepared as packaging material, and the roll body and the cushioning material (the roll body to which the cushioning material was fixed) were covered with it so as not to come into contact with the wound body. As described above, since the cushioning material has an overhang, in the radial direction, a gap is maintained between the outermost surface of the wound body and the packaging material, corresponding to the difference between the distance from the center of the cushioning material to the outer surface and the distance from the center of the wound body to the outermost surface. Table 1 shows whether or not there was contact between the outermost surface of the wound body and the packaging material.

[0228] (Placement process) On both sides of the axial direction, a side plate was placed on the opposite side of the roll body from the cushioning material.

[0229] Specifically, two side plates (manufactured by Hiroho Co., Ltd.) with a roughly rectangular shape, 310 mm on each side and 40 mm in length along the axial direction, were prepared. Next, the side plates were placed on the outside of the cushioning material (opposite the roll body relative to the cushioning material) on both sides along the axial direction. Then, the side plates were secured using polypropylene bands.

[0230] Based on the above, the packaging of Example 1 was manufactured.

[0231] Example 2 The packaging body of Example 2 was manufactured in the same manner as in Example 1, except that the following degassing step was performed after the covering step and before the placement step.

[0232] (Degassing process) The roll body with the coated cushioning material fixed to it was degassed. Specifically, a vacuum pump was used to evacuate the roll body with the coated cushioning material fixed to it for 5 seconds. Table 1 shows whether or not the degassing process was performed.

[0233] Example 3 The packaging for Example 3 was prepared in the same manner as in Example 1, except as described below.

[0234] As cushioning material, two pieces each of a cushioning material (made of polyethylene (PE)) with an outer shape that is roughly rectangular, with a side length of 150 mm (in Table 1, the radial length is indicated as 150 mm square; the same applies hereafter) and an axial length of 1 mm, and a plate material (made of polypropylene (PP)) with an outer shape that is roughly rectangular, with a side length of 150 mm (150 mm square) and an axial length of 4 mm were prepared. Since the side length of the cushioning material (cushion material and plate material) is larger than the diameter of the roll, the cushioning material (cushion material and plate material) has an overhang. In addition, the cushioning material (cushion material and plate material) has a through hole in the radial center to serve as a fixing point. The diameter of the through hole in the cushioning material (cushion material and plate material) is the same as that of the core of the roll.

[0235] Then, on both sides of the axial direction, the core was fixed by inserting the protruding part of the winding core into the through-hole of the cushioning material so that the winding body side (inner side) would act as a cushioning material. When the roll body was placed on the horizontal surface of the support frame with the cushioning material fixed to the core on both sides of the axial direction, the roll body was supported by the protruding parts of the cushioning material placed on both sides of the axial direction, allowing the roll body to stand on its own. At this time, the outermost surface of the roll body (the outermost surface of the winding body) did not come into contact with the aforementioned horizontal surface.

[0236] Comparative Example 1 A package for Comparative Example 1 was prepared in the same manner as in Example 1, except that it did not include a fixing process.

[0237] Specifically, the cushioning material was not fixed in place, and the roll was directly covered with the packaging material. In other words, the packaging material was in contact with the outermost surface of the roll in the radial direction, and in contact with the side surface of the roll in the axial direction.

[0238] Comparative Example 2 The packaging for Comparative Example 2 was prepared in the same manner as in Example 1, except as described below.

[0239] Two sheets of polypropylene were prepared as cushioning material, each with a roughly rectangular shape, a side length of 90 mm (90 mm square), and an axial length of 4 mm. The length of one side of the cushioning material is shorter than the diameter of the roll, and the maximum radial length of the cushioning material (diagonal length: 127 mm) is also shorter than the diameter of the roll, so the cushioning material does not have any protruding parts. The cushioning material also has a through hole in the radial center to serve as a fixing point. The diameter of the through hole in the cushioning material is the same as that of the core of the roll.

[0240] Then, on both sides of the axial direction, the protruding portion of the winding core was inserted into the through-hole in the cushioning material to secure it. However, when the roll body was placed on the horizontal surface of the support frame with the cushioning material secured to the winding core on both sides of the axial direction, the roll body was not supported because the cushioning material did not have any protruding portion, and the roll body could not stand on its own. At this time, the outermost surface of the roll body (the outermost surface of the winding body) was in contact with the aforementioned horizontal surface.

[0241] When the material was covered with packaging, the packaging material was in contact with the outermost surface of the coiled body in the radial direction.

[0242] Comparative Example 3 A packaging body for Comparative Example 3 was prepared in the same manner as in Example 1, except as described below.

[0243] Two pieces of polyethylene cushioning material were prepared as cushioning material. Each piece had a roughly circular outer shape, a diameter of 110 mm (110 mmφ), and an axial length of 55 mm. Since the diameter of the cushioning material is shorter than the diameter of the roll, the cushioning material does not have any protruding parts. The cushioning material also has a through hole in the radial center to serve as a fixing point. The diameter of the through hole in the cushioning material is the same as that of the core of the roll.

[0244] Then, on both sides of the axial direction, the protruding portion of the winding core was inserted into the through-hole in the cushioning material to secure it. However, when the roll body was placed on the horizontal surface of the support frame with the cushioning material secured to the winding core on both sides of the axial direction, the roll body was not supported because the cushioning material did not have any protruding portion, and the roll body could not stand on its own. At this time, the outermost surface of the roll body (the outermost surface of the winding body) was in contact with the aforementioned horizontal surface.

[0245] When the material was covered with packaging, the packaging material was in contact with the outermost surface of the coiled body in the radial direction.

[0246] <Rating> [exterior] In each example and comparative example, the surface of the laminated film was observed to check for the presence or absence of indentations. Specifically, the packaging was stored at room temperature for one week. After storage, all parts except the roll were removed from the packaging, and the laminated film was unwound from the roll. The surface of the HC layer was visually inspected for the presence or absence of indentations originating from the packaging material. In addition, the presence or absence of indentations originating from the side plates was also checked at both ends in the width direction of the laminated film. The results are shown in Table 1. {standard} A: No indentations were found on either the surface or edges of the laminated film. B: Indentations were observed on either the surface or the edge of the laminated film. C: Indentations were observed on both the surface and edges of the laminated film.

[0247] [Table 1]

[0248] <Consideration> The packaging in Examples 1 to 3 has a cushioning material, and the cushioning material has an overhang. Therefore, the packaging material does not come into contact with the outermost surface of the winding body, and marks on the surface and edges of the laminated film can be suppressed.

[0249] On the other hand, the packaging of Comparative Example 1 did not have cushioning material. As a result, the packaging material came into contact with the rolled body, causing marks on the surface of the laminated film. In addition, the side plates caused marks on the edges of the laminated film.

[0250] Furthermore, although the packaging in Comparative Examples 2 and 3 included cushioning material, the cushioning material did not have any protruding portions. As a result, the packaging material came into contact with the rolled body, causing marks to appear on at least one of the surfaces and edges of the laminated film. [Explanation of Symbols]

[0251] 1 Packaging 2 rolls 3 Cushioning material 4 Packaging materials 5 Side panels 20 cores 201 Protrusion 21 coiled body 210 Laminated Film 211 Resin film 30 Fixed part 31. Protruding part

Claims

1. A roll body comprising a core and a winding body of laminated film wound around the core, On each of the axial sides of the aforementioned winding core, a cushioning material is provided, which is fixed to the winding core and positioned to contact the side surface of the winding body. The roll body and the packaging material covering the cushioning material, On each of the axial sides of the aforementioned winding core, a side plate is positioned opposite the winding body to the cushioning material, and Equipped with, In the radial direction of the winding core, the cushioning material has an overhang that extends outward from the winding body. A packaging body in which, in the radial direction, there is a gap between the outermost surface of the wound body and the packaging material.

2. The laminated film comprises a resin film, The packaging according to claim 1, wherein the transmittance of the resin film is less than 50%.

3. The laminated film comprises a resin film, The packaging body according to claim 1, wherein the resin film has voids.

4. The packaging body according to claim 1, wherein the laminated film comprises a metallic reflective layer.

5. The packaging body according to claim 1, wherein the packaging material is an aluminum film.

6. The packaging body according to any one of claims 1 to 5, wherein the length of the cushioning material is longer than the diameter of the roll body throughout the entire radial region.

7. The aforementioned cushioning material consists of a cushioning material, The packaging body according to any one of claims 1 to 5, wherein the roll body is self-supporting with the cushioning material fixed to the core.

8. The aforementioned cushioning material consists of a cushioning material and a plate material. The packaging body according to any one of claims 1 to 5, wherein the roll body is self-supporting with the cushioning material fixed to the core.

9. A preparation step for preparing a roll body comprising a core and a winding body of laminated film wound around the core, A fixing step is to fix the cushioning material to the core on each of the axial sides of the core so as to contact the side surface of the winding body, A covering step in which the roll body and the cushioning material are covered with packaging material, The arrangement step involves placing a side plate on the opposite side of the winding body from the cushioning material on each of the axial sides of the winding core, and Equipped with, In the radial direction of the winding core, the cushioning material has an overhang that extends outward from the winding body. A method for manufacturing a packaging body, wherein, in the radial direction, a gap is provided between the outermost surface of the wound body and the packaging material.

10. The method for manufacturing a packaging body according to claim 9, further comprising a degassing step of degassing the roll body and cushioning material covered with the packaging material after the covering step.

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