Film storage box and film storage body

Abstract

To provide a film storage box that is easy to hold and looks beautiful from many angles.SOLUTION: A film storage box includes: a storage part that can accommodate a film wound body, which is film wound around, and has a front board, a bottom board, a rear board and a side board, with its top face open; and a lid part that has a lid board capable of opening and closing the opening in the top face of the storage part, and a sub-lid piece which extends from the lid board toward the front board side of the storage part and, when closed, covers at least a part of the front board. The exterior face of the film storage box in at least one member out of a group composed of the lid board, the sub-lid piece, the bottom board and the rear board includes a region where (i) the difference between the diffusion degree DR60 at 60° and the diffusion degree DR20 at 20° is not larger than 150, and (ii) the maximum height Sp of a mountain is not smaller than 0.010 mm.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present application relates to a film storage box and a film storage body. [Background technology]

[0002] Wrap films are widely used to wrap ingredients, dishes, or tableware such as plates together with the food. Wrap films are typically wound into a roll (rolled body) around a long cylindrical core and stored in a long, rectangular parallelepiped film storage box. For example, Patent Document 1 discloses technology related to a film storage box. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-170454 Summary of the Invention [Problem to be solved by the invention]

[0004] The technology described in Patent Document 1 leaves room for improvement in terms of both ease of holding and aesthetic appearance when viewed from multiple directions.

[0005] The present invention has been made in view of the above points, and an object of the present invention is to provide a film storage box that is both easy to hold and aesthetically pleasing when viewed from multiple directions. [Means for solving the problem]

[0006] As a result of extensive research, the inventor discovered that the above problems could be solved by including an area on the surface of a film storage box having specified physical properties, and thus completed the present invention.

[0007] That is, the present invention includes the following aspects. [1] a storage section that can store a roll of film wound around it, the storage section having a front panel, a bottom panel, a rear panel, and side panels, and an open top; a cover portion including a cover plate that can open and close an opening on the top surface of the storage portion, and a cover piece that extends from the cover plate toward a front plate of the storage portion and covers at least a portion of the front plate when closed; A film storage box comprising: The outer surface of the film container of at least one member selected from the group consisting of the cover plate, the cover piece, the bottom plate, and the rear plate has a diffusion degree DR at 60°. 60 and diffusivity DR at 20° 20 and (ii) the maximum height Sp of the peaks is 0.010 mm or more. [2] The film storage box according to [1], wherein the center surface average value Sa of the region is 0.002 mm or more. [3] Diffusion degree DR of the region 20 The film storage box according to [1] or [2], wherein the film density is 100 or more and less than 300. [4] Diffusion degree DR of the region 60 The film storage box according to any one of [1] to [3], wherein is 100 or more and 200 or less. [5] The film storage box according to any one of [1] to [4], wherein the base material of the film storage box is paper. [6] The film storage box according to any one of [1] to [5], wherein the film storage box includes a base material and a surface layer that covers the entire surface of the base material. [7] A film container in which the roll is contained in a film container box according to any one of [1] to [6]. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a film storage box that is both easy to hold and has a beautiful appearance when viewed from multiple directions. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a perspective view showing an example of the configuration of a film container. [Figure 2] FIG. 2 is a perspective view showing the film container when the cover is open. [Figure 3] FIG. 2 is a perspective view showing the configuration of a roll and a film storage box. [Figure 4] FIG. 2 is a development view of the front side of the film storage box. [Figure 5] FIG. 10 is a front view of the film storage box with the tear strip removed. [Figure 6] 10 is a development view of another example of a film storage box showing area A. FIG. [Figure 7] Fig. 7(A) is a diagram showing an example of the cross-sectional structure of region A. Fig. 7(B) is a diagram showing an example of the cross-sectional structure of a region where the coater varnish is not sufficiently formed. [Figure 8] FIG. 10 is a diagram showing an example of an image obtained by observing the cross section of one surface of a film storage box using a scanning electron microscope. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention (hereinafter also referred to as "the present embodiment") will be described in detail with reference to the drawings as appropriate. Note that the present invention is not limited to the present embodiment, and various modifications can be made within the scope of the gist of the present invention. Hereinafter, the same elements will be given the same reference numerals, and duplicated explanations will be omitted.

[0011] The film storage box of this embodiment is a film storage box that is capable of storing a roll of film wound around it, and includes a storage section that has a front plate, a bottom plate, a rear plate, and side plates and is open at the top, a lid section that has a lid plate that can open and close the opening at the top of the storage section, and a cover piece that extends from the lid plate toward the front plate of the storage section and covers at least a part of the front plate when closed, and in at least one member selected from the group consisting of the lid plate, the cover piece, the bottom plate, and the rear plate, the outer surface of the film storage box has a diffusion degree DR at 60° 60and diffusivity DR at 20° 20 and (ii) the maximum height Sp of the peak is 0.010 mm or more (hereinafter also referred to as "area A"). Because the film storage box of this embodiment is configured in this way, it can be both easy to hold and has an aesthetic appearance when viewed from multiple directions.

[0012] FIG. 1 is a perspective view showing an example of a film storage body 1 according to the present embodiment. FIG. 2 is a perspective view of the film storage body 1 in an unsealed state. FIG. 3 is a perspective view showing the film storage box 10 and the roll 11 of the film storage body 1. In this specification, the terms "upper" and "lower" in the configuration of the film storage body 1 and the film storage box 10 refer to the orientation shown in FIG. 1, i.e., the orientation of the film storage box 10 with a bottom plate 31 (described below) facing downward and a cover plate 40 facing upward. The front plate 30 side of the film storage box 10 is referred to as the "front," and the rear plate 32 side is referred to as the "rear." Furthermore, the longitudinal direction (left-right direction) of the film storage box 10 is referred to as the "X direction," the front-rear direction perpendicular to the longitudinal direction X of the film storage box 10 is referred to as the "Y direction," and the up-down direction of the film storage box 10 is referred to as the "Z direction."

[0013] 1 to 3, the film container 1 has a film container box 10 and a roll 11 of film F. That is, the film container of this embodiment has a configuration in which the roll is contained in the film container box of this embodiment.

[0014] The film storage box 10 has, for example, an elongated rectangular parallelepiped shape as a whole. The material that makes up the film storage box 10 is, for example, paper such as cardboard, coated cardboard, corrugated cardboard, etc. However, it is not limited to these, and any paper or other material known in the industry may be appropriately selected and used.

[0015] Fig. 4 is an exploded view showing the surface of film storage box 10 when film storage box 10 is unfolded. As shown in Figs. 3 and 4, film storage box 10 can store roll 11 around which film F is wound, and has storage section 20 with an open top, and lid 21 that opens and closes the opening on the top of storage section 20.

[0016] As shown in FIG. 4, the storage section 20 has, for example, a front panel 30, a bottom panel 31, a rear panel 32, front panel side pieces 33, side panels 34, rear panel side pieces 35, a back panel 36, and back panel side pieces 37.

[0017] In the developed view of Figure 4, the back panel 36, front panel 30, bottom panel 31, and rear panel 32 each have a rectangular shape and are connected to one another in this order in the front-to-rear direction Y. The front panel side pieces 33 have a square shape and are connected to both ends of the front panel 30 in the left-right direction X. The side panels 34 have a square shape and are connected to both ends of the bottom panel 31 in the left-right direction X. The rear panel side pieces 35 have a square shape and are connected to both ends of the rear panel 32 in the left-right direction X. The back panel side pieces 37 are connected to both ends of the back panel 36 in the longitudinal direction X.

[0018] The front panel 30 has a wavy cut 30a formed along both ends in the left-right direction X. A temporary fastening member Q for temporarily fastening the end of the film F is provided on the surface of the front panel 30. The back panel 36 has a cut 36a formed therein that connects to the connection line (fold line) between the back panel 36 and the front panel 30.

[0019] As shown in FIG. 3 , the storage section 20 is formed in the shape of a rectangular parallelepiped with an open top. The front panel 30, bottom panel 31, rear panel 32, and side panels 34 form five wall surfaces of the storage section 20 other than the top surface. The back panel 36 is folded back inside the front panel 30 and is disposed on the back surface of the front panel 30. The upper portion of the front panel 30 above the cutout 30a is separated from the lower portion and protrudes forward. The upper portion of the back panel 36 above the cutout 36a is separated from the lower portion and protrudes rearward. The rear panel side pieces 35 are folded back inside the side panels 34 and cover the inner surfaces of the side panels 34. The front panel side pieces 33 and the back panel side pieces 37 are folded back inside the side panels 34 and are interposed between the rear panel side pieces 35 and the side panels 34.

[0020] As shown in the development view of FIG. 4, the lid portion 21 has a lid plate 40, a cover piece 41, a cover plate side piece 42, a cover side piece 43, an opening piece 44, and the like.

[0021] The cover plate 40 and the cover piece 41 have a rectangular shape and are connected to each other in the front-to-rear direction Y. The cover plate 40 is connected to the upper end of the rear plate 32, and the cover piece 41 is connected to the front end of the cover plate 40. The cover plate side pieces 42 have a square shape and are connected to both ends of the cover plate 40 in the left-to-right direction X. The cover side pieces 43 have a square shape and are connected to both ends of the cover piece 41 in the left-to-right direction X. The opening piece 44 is formed in a strip shape and is connected to the tip of the cover piece 41 so that it can be cut off. A connection line (cut line) P1 is formed between the cover piece 41 and the opening piece 44. The center of the cut line P1 in the left-to-right direction X is curved convexly toward the opening piece 44, and both sides are curved convexly toward the cover piece 41. In other words, the cut line P1 is formed in a substantially M shape.

[0022] As shown in Fig. 3, the cover plate 40 extends from the upper end of the rear plate 32 toward the front plate 30, and covers the upper surface of the storage section 20 to close the opening when the cover section 21 is closed, as shown in Fig. 1. The cover piece 41 extends from the front end of the cover plate 40 toward the front plate 30. The cover piece 41 has a vertical width smaller than that of the front plate 30, and is configured to cover the upper region of the front plate 30 when the cover section 21 is closed. As shown in Fig. 3, the cover side piece 43 is folded back inside the cover plate side piece 42, covering the inner surface of the cover plate side piece 42.

[0023] As shown in FIG. 5, the tip of the cover piece 41 is provided with a cutting blade 50 for cutting the film F pulled out from the roll 11 in the storage section 20.

[0024] The cutting blade 50 is formed, for example, in the shape of a saw blade. The cutting blade 50 has a thin plate shape made of, for example, metal, resin, vulcanized fiber, or the like, and is attached to the back surface of the tip of the cover piece 41. The shape of the cutting blade 50 is a conventionally known shape, such as a straight, V-shaped, or arch-shaped one. The cutting blade 50 may also be located on the ridge between the bottom plate 31 and the front plate 30.

[0025] In this embodiment, the film container 10 has a surface on at least one of the cover plate 40, the cover piece 41, the bottom plate 31, and the rear plate 32, which has a diffusion degree DR at 60°. 60 and diffusivity DR at 20°20 (hereinafter, also referred to as "diffusivity difference d") is 150 or less, and (ii) the maximum height Sp of the peaks is 0.010 mm or more.

[0026] The physical properties of region A will be explained below.

[0027] The diffusion difference d in region A is 150 or less, preferably 100 or less, and more preferably 50 or less, from the viewpoint of not impairing the aesthetic appearance when viewed from multiple directions. The diffusivity difference d can be measured based on the method described in the Examples below. The diffusivity difference d can be adjusted to fall within the above range, for example, by employing a preferred manufacturing method described below.

[0028] Diffusion DR in area A 20 From the viewpoint of a luxurious appearance when viewed from multiple directions, the value is preferably 100 or more and less than 300, more preferably 100 or more and 250 or less, and even more preferably 100 or more and 200 or less. Diffusion DR 20 can be measured based on the method described in the Examples below. Diffusion DR 20 can be adjusted to fall within the above range, for example, by employing a preferred production method described below.

[0029] Diffusion DR in area A 60 From the viewpoint of a luxurious appearance when viewed from multiple directions, the value is preferably 100 or more and 200 or less, more preferably 100 or more and 175 or less, and even more preferably 100 or more and 150 or less. Diffusion DR 60 can be measured based on the method described in the Examples below. Diffusion DR 60 can be adjusted to fall within the above range, for example, by employing a preferred production method described below.

[0030] The maximum height Sp of the peaks in region A is 0.010 mm or more, preferably 0.011 mm or more, and more preferably 0.012 mm or more, from the viewpoint of ease of holding. The maximum height Sp of the peaks can be measured based on the method described in the examples below. The maximum height Sp of the peaks can be adjusted to fall within the above range, for example, by employing a preferred manufacturing method described below.

[0031] From the viewpoint of ease of holding, the center plane average value Sa in the region A is preferably 0.002 mm or more, and more preferably 0.003 mm or more. The central plane average value Sa can be measured based on the method described in the examples below. The center plane average value Sa can be adjusted to fall within the above range, for example, by employing a preferred manufacturing method described below.

[0032] From the viewpoint of ease of holding, the static friction coefficient in region A is preferably 0.50 or more, more preferably 0.60 or more, and even more preferably 0.70 or more. The static friction coefficient can be measured based on the method described in the examples below. The static friction coefficient can be adjusted to fall within the above range, for example, by employing a preferred manufacturing method described below.

[0033] From the viewpoint of ease of holding, the coefficient of dynamic friction in region A is preferably 0.30 or less, more preferably 0.20 or less, and even more preferably 0.15 or less. The dynamic friction coefficient can be measured based on the method described in the examples below. The dynamic friction coefficient can be adjusted to fall within the above range, for example, by employing a preferred manufacturing method described below.

[0034] The layout of area A will be described below.

[0035] 4, the region A may be formed over the entire surface of the cover plate 40, the cover piece 41, the bottom plate 31, and the rear plate 32, for example, over 90% or more of the entire surface of each part. For example, the region A of the cover piece 41 may be formed in the range close to the tear line P1 between the cover piece 41 and the opening piece 44, excluding the band-shaped region R1 along the tear line P1.

[0036] 6, the region A may be formed in a part of the cover plate 40 and the rear plate 32. For example, the region A may be formed in a central region A1 when the cover plate 40 and the rear plate 32 are divided into thirds in the left-right direction X, or in regions A2 on both the left and right ends when the cover plate 40 and the rear plate 32 are divided into fifths in the left-right direction X.

[0037] The central region A1 of the cover plate 40 and the rear plate 32 primarily contributes to preventing slippage during use of the film container 1. When using the film container 1, it is expected that one hand will grasp the central portion of the film container 1 in the left-right direction X and the other hand will pull out the film F from the roll 11. Therefore, the length of the central region A1 of the cover plate 40 and the rear plate 32 in the left-right direction X should be approximately the width of a standard adult palm to twice the width of the palm, and is preferably, for example, approximately 70 mm to 200 mm. The length of the central region A1 of the cover plate 40 and the rear plate 32 in the left-right direction X may be approximately one-third to one-half of the total length of the cover plate 40 and the rear plate 32 in the left-right direction X, respectively.

[0038] Areas A2 at both left and right ends of cover plate 40 and rear plate 32 mainly contribute to preventing slippage when removing film container 1 from a storage location or when transferring film container 1. The length of areas A2 at both left and right ends of cover plate 40 and rear plate 32 may be approximately 20 mm or more and 50 mm or less.

[0039] Furthermore, the proportion of the area of ​​the region A1 and the region A2 relative to the entire area of ​​the cover plate 40 or the rear plate 32 is not particularly limited, but may be 30% or more and 100% or less.

[0040] A method for forming the region A will be described below.

[0041] The method for forming the region A is as follows: (i) Diffusion degree DR at 60° 60 and diffusivity DR at 20° 20 As long as the difference between the peak heights S and the peak heights S is 150 or less and (ii) the maximum peak height Sp is 0.010 mm or more, the region can be formed by, for example, the following method. First, a primer is coated or printed on the surface of the substrate of the film storage box 10. Next, the coated or printed primer is cured to form a primer layer (hereinafter also referred to as an "intermediate layer"). A coating agent (hereinafter also referred to as a "coater varnish") is coated or printed on the intermediate layer. The coated or printed coater varnish is then cured to form a coater varnish layer (hereinafter also referred to as a "surface layer"). Adjusting the curing timing of the surface layer tends to form region A. For example, the earlier the curing timing, the better the aesthetic appearance when viewed from multiple directions. For example, the curing process may begin within one second after the coater varnish is applied. The curing timing can be adjusted by adjusting the composition of the coater varnish, the printing speed of the coater varnish, and the viscosity of the coater varnish, and by appropriately selecting the type of primer. For example, if the printing speed of the coater varnish increases, the curing timing tends to be earlier, and if the viscosity of the coater varnish increases, the curing timing also tends to be earlier, so the curing timing can be adjusted depending on these conditions, etc.

[0042] For example, paper can be used as the base material of the film storage box 10. Examples of paper include, but are not limited to, cardboard, coated cardboard, corrugated cardboard, etc., and various known types of paper can be appropriately selected and used. These may be embossed, printed, or laminated with polyethylene, etc.

[0043] For example, an electron beam or ultraviolet curable ink can be used as the primer. For the electron beam or ultraviolet curable ink, a base compound containing a mixture of polymers, oligomers, monomers, photopolymerization initiators, etc. can be used, to which polyethylene wax or reactive silicone is added as an auxiliary agent at 0 to 10 mass % of the base compound. This auxiliary agent can impart liquid repellency (separability from coater varnish) to the primer. When the primer is liquid repellent, the coater varnish tends to be repelled, which tends to improve the feel of the ink.

[0044] Examples of polymers that can be contained in the base agent include so-called monofunctional monomers having one polymerizable vinyl group in one molecule, such as methyl acrylate, methyl methacrylate (hereinafter, "methyl acrylate" and "methyl methacrylate" will be referred to as "(meth)acrylate", and the same will be used hereinafter), ethyl (meth)acrylate, n-butyl (meth)acrylate, hexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, lauryl (meth)acrylate, isobornyl (meth)acrylate, dicyclopentenyl (meth)acrylate, N-vinylpyrrolidone, and styrene; and ethylene glycol di(meth)acrylate, propylene glycol di(meth)acrylate, and the like. Examples of such monomers include so-called bifunctional monomers having two polymerizable vinyl groups in one molecule, such as hexanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, diethylene glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, and dipropylene glycol di(meth)acrylate, and so-called polyfunctional monomers having three or more polymerizable vinyl groups in one molecule, such as trimethylolpropane tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate, and tris(acryloxyethyl)isocyanurate.

[0045] Monomers and oligomers that can be contained in the base resin include unsaturated polyesters, polyester (meth)acrylate, polyether (meth)acrylate, polyol (meth)acrylate, epoxy (meth)acrylate, urethane (meth)acrylate, and other monomers and oligomers thereof.

[0046] The photopolymerization initiator that can be contained in the base resin is not particularly limited, but is preferably a substance that can be dissolved in the polymerizable composition, such as a radical polymerization initiator or a cationic polymerization initiator. Examples of such photopolymerization initiators include acetophenones such as p-butyltrichloroacetophenone, 2,2'-diethoxyacetophenone, and 2-hydroxy-2-methyl-1-phenylpropan-1-one, ketones such as benzophenone, 4,4'-bisdimethylaminobenzophenone-2-chlorothioxanthone, 2-methylthioxanthone, 2-ethylthioxanthone, 2-isopropylthioxanthone, benzyl dimethyl ketal, and hydroxycyclohexylphenyl ketone, benzoins such as benzoin methyl ether, benzoin isopropyl ether, and benzoin isobutyl ether, Michler's benzoyl benzoate, α-amyloxime ester, and tetramethylmeuram monosulfide.

[0047] The photopolymerization initiator may be used in combination with a photosensitizer, such as n-butylamine, n-dibutylamine, triethylamine, triethylenetetramine, or triethanolamine.

[0048] There are no particular limitations on the method for coating or printing the primer onto the surface of the base material of the film storage box 10. The primer may be coated or printed in an amount such that the dry film thickness is approximately 0.5 μm to 1.5 μm.

[0049] When printing the primer, offset printing (lithographic printing), gravure printing, etc. may be used, for example. When applying the primer, it may be applied solidly to the area where region A is to be formed, or it may be applied to the area in a predetermined pattern. When applying the primer in a predetermined pattern to the area where region A is to be formed, a screen mask or the like may be used.

[0050] When the primer is an electron beam or ultraviolet curable ink, it can be cured by irradiating it with ultraviolet light or electron beam. When the primer is not an electron beam or ultraviolet curable ink, it can be cured by drying or the like.

[0051] The coater varnish applied onto the primer may contain an ultraviolet-curable resin or an electron beam-curable resin, and may be a mixture of polymers, oligomers, monomers, photopolymerization initiators, etc., similar to the base ink used in the primer. Furthermore, a surface conditioner may be added as an auxiliary. Examples of surface conditioners include leveling agents and natural wax-based lubricants. The polymer that can be contained in the coater varnish is preferably an acrylic resin. For example, the coater varnish may contain an amino group-containing styrene (meth)acrylic resin, vegetable oil-modified (meth)acrylate, fatty acid ester, (meth)acrylate compound, photopolymerization initiator, leveling agent and defoaming agent, antibacterial agent, antistatic agent, surfactant, polymerization inhibitor, antioxidant, wax, slip agent, etc. Various known compounds that can be used as coater varnishes can be used for each of these components. For example, polyethylene glycol di(meth)acrylate, glycerin propoxylate triacrylate, trimethylolpropane (EO)-modified triacrylate, etc. can be used as the (meth)acrylate compound. Furthermore, for example, 1-hydroxycyclohexyl phenyl ketone, methyl-o-benzoyl benzoate, etc. can be used as a photopolymerization initiator.

[0052] Examples of leveling agents that can be contained in the coater varnish include alcohols having 6 or more carbon atoms. Examples of alcohols having 6 or more carbon atoms include isooctadecyl alcohol. Isooctadecyl alcohol tends to function favorably as a leveling agent for the acrylic resin that can be contained in the coater varnish, and as a result, region A tends to be formed. From the viewpoint of facilitating the formation of region A, the content of isooctadecyl alcohol is preferably 2 to 4 parts per 100 parts of coater varnish.

[0053] When applying the coater varnish, it may be applied solidly to the area that will form region A, or it may be applied in a predetermined pattern to that area. When applying the coater varnish in a predetermined pattern to the area that will form region A, a screen mask or the like may be used.

[0054] According to the above-described example of the forming method, a region A having an uneven surface structure tends to be formed. In this embodiment, the film storage box preferably includes a substrate and a surface layer covering the entire surface of the substrate. As an example of such a film storage box, the outer surface of the film storage box preferably has an uneven surface structure, and the uneven surface preferably includes recesses resulting from the coater varnish. FIG. 7(A) is a diagram showing an example of the cross-sectional structure of region A. As illustrated in FIG. 7(A), a base layer (not shown in the figure because it is a thin layer) and a coater varnish layer L2 are formed on the surface of the substrate L1 of the film storage box 10. This configuration tends to reduce the exposed surface area of ​​the substrate L1, resulting in a diffusion difference d of 150 or less and maintaining aesthetic appeal even when viewed from multiple directions. On the other hand, in the example of FIG. 7(B), the base layer is insufficiently formed on the surface of the substrate L1, resulting in an increase in areas where the coater varnish layer L2 is insufficiently formed, i.e., an increase in the exposed surface area of ​​the substrate L1. With this configuration, the diffusivity difference d tends to exceed 150, which can impair aesthetic appearance when viewed from multiple directions. Thus, when the undercoat layer and coater varnish layer are sufficiently formed to form a concave-convex structure, the diffusivity difference d tends to be 150 or less. In this embodiment, whether the surface layer covers the entire surface of the substrate can be confirmed, for example, as follows: One surface of the film storage box is cut out as a sample, and the sample is cut with a microtome so that the cross-section of the concave-convex shape can be confirmed, thereby obtaining a smooth cross-section. The cross-section is observed with a scanning electron microscope (SEM). In the image obtained by such SEM observation, typically, from the top, a layered structure composed of a surface layer and an intermediate layer, a coating layer (a layer intended to impart hiding properties and smoothness, which can be formed, for example, as in JP 2000-192395 A), and a layered structure composed of the substrate can be confirmed. An example of such observation is shown in FIG. 8. The cross-section observation is performed so that the image includes a location where the difference in the unevenness of the surface layer is 10 μm or more. In this case, the images may be combined as necessary.Furthermore, if a surface layer with a height exceeding 2 μm can be confirmed in the recesses in the image, the image can be regarded as including recesses originating from the coater varnish layer.

[0055] When the coater varnish contains an ultraviolet-curable resin, the coater varnish can be cured by irradiating it with ultraviolet light using a known ultraviolet irradiation device (such as a mercury lamp, ultraviolet lamp, incandescent lamp, or halogen lamp). When the coater varnish contains an electron-beam-curable resin, the coater varnish can be cured by irradiating it with electron beams using any of various known devices capable of irradiating electron beams, radiation, or the like.

[0056] 3, the roll 11 has, for example, a cylindrical paper core tube 70, and the film F is wound around the core tube 70. The core tube 70 has, for example, a length approximately equal to the length of the interior of the film storage box 10 in the left-right direction X.

[0057] Film F may be, for example, a wrap film, and may be an adhesive film. Film F may have a static friction coefficient of 2.0 or more with respect to the tactile contact. The static friction coefficient can be measured in the same manner as described above.

[0058] The film storage box 10 is not limited to the above embodiment and may have other configurations and shapes. The storage section 20 may have at least a front plate, a bottom plate, a rear plate, and side plates, and the lid section 21 may have at least a lid plate and a cover piece. Area A may be provided in at least one of the lid plate, cover piece, bottom plate, and rear plate, or may be provided in multiple locations among the lid plate, cover piece, bottom plate, and rear plate. Area A may also be provided on the side plates, front plate, etc. in addition to the lid plate, cover piece, bottom plate, and rear plate. The film F is not limited to cling film for food packaging and may be aluminum foil, cooking sheet, etc. [Example]

[0059] The present embodiment will be described in more detail below with reference to examples, but the present embodiment is not limited to these examples in any way.

[0060] (Diffusion) The samples prepared in the examples and comparative examples described below were measured using a surface reflection analyzer (RA 532H) manufactured by Canon Inc. as the measuring device. The measuring device was firmly pressed against the sample to prevent ambient light from entering through the surface layer of the prepared sample, and the results of the 20° and 60° diffusion degrees obtained when the measuring device was in close contact with the sample were read. A total of five measurements were made at different measurement points on the surface layer of the sample, and the arithmetic mean value of the five 60° diffusion degrees was calculated as the diffusion degree DR. 60 Similarly, the arithmetic mean value of five measurements of the diffusivity at 20° was calculated as the diffusivity DR 20 Diffusion degree DR 20 From diffusion DR 60 The result of subtracting this was taken as the difference in diffusivity d.

[0061] (surface roughness) The samples prepared in the examples and comparative examples described below were measured using a Mitutoyo Corporation CNC surface roughness measuring instrument, "SURFTEST Extreme SV-3000 CNC." The results were analyzed using analysis software, "FORMTRACEPAPRO (Formtracepak for Windows version 6.002)." Specifically, the sample was first attached to a glass plate using double-sided tape that does not affect the sample's surface shape, with the surface layer (the layer formed using each coater varnish) facing the measurement surface. Next, measurements were performed using a standard stylus (tip radius 10 μm) at measurement point 101, measurement length 10 mm, measurement pitch 100 μm, range 800 μm, 3D measurement pitch 100 μm, measurement speed 1.0 mm / sec, and return speed 5 mm / s. Using analysis software, plane correction and a set of band undulation curves (filter type: GAUSSIAN, X-direction high-pass cutoff 0.200 mm, X-direction low-pass cutoff 2.000 mm, Y-direction high-pass cutoff 0.200 mm, Y-direction low-pass cutoff 2.000 mm) were performed, and mean plane correction and automatic generation of approach and trailing runs were performed, measuring an area of ​​10 mm x 10 mm, and the maximum height Sp of the peaks and the average value Sa of the central plane were obtained.

[0062] (coefficient of friction) The friction coefficients of the samples prepared in the examples and comparative examples described below were measured using a Trinity Lab friction tester, model TL201Tt. The tactile contactor used was a Trinity Lab finger model, purchased within one year and free of dirt and wear. A 30 mm x 50 mm sample piece cut to a length of 50 mm in the measurement direction was attached to a stainless steel plate, which was then fixed to the table surface of the friction tester. The surface layer (the layer formed using each coater varnish) was positioned as the measurement surface. The tactile contactor was placed on the measurement surface of the sample piece with a load of 100 g and moved 40 mm at 10 mm / sec to measure the friction force between the friction adjustment area and the tactile contactor. The static friction force was determined by dividing the maximum load at which the tactile contactor began to move by the 100 g load. The peak portion of the static friction force was excluded, and the average load from the start of the relative shear movement between the contact surfaces up to 30 mm was taken as the kinetic friction force. This was then divided by a 100-gram load to calculate the kinetic friction coefficient. Measurements were performed in an atmosphere of 23°C and 50% RH. A total of five measurements were performed using different samples, and the arithmetic average of the five measurements was used as the measured value. If it was not possible to cut a sample to a length of 50 mm in the measurement direction, the length was adjusted appropriately. In this case, the kinetic friction coefficient was calculated by excluding the peak portion of the static friction force and taking the average load from the start of the relative shear movement between the contact surfaces up to the point where the friction force in the measurement area was obtained as the kinetic friction force, and dividing this by a 100-gram load.

[0063] (evaluation) A sensory evaluation was conducted on the samples of Examples 1 to 5 and Comparative Examples 1 to 5 regarding whether they had a luxurious appearance and how comfortable they were to hold. That is, 100 subjects were asked to rate each item on a five-point scale of "5: very good," "4: good," "3: average," "2: bad," and "1: very bad," and the results were evaluated as follows based on the average scores obtained. (standard) 5 (average score 4.5 to 5.0): Excellent 4 (average score 3.5 or more but less than 4.5): Excellent 3 (average score 2.5 or more but less than 3.5): Average 2 (average score 1.5 or more but less than 2.5): Poor 1 (average score 1 or more but less than 1.5): Significantly poor

[0064] (Preparation of Coater Varnish for Forming Upper Layer) (Preparation of Coater Varnish 1) Coater varnish 1 was prepared by mixing 20.0 parts of "Beamset 271" (manufactured by Arakawa Chemical Industries) as an amino group-containing styrene (meth) acrylic resin, 10.0 parts of "Photomer 3005F" (manufactured by IGM) as a vegetable oil-modified (meth) acrylate, 1.0 parts of triacylglycerol as a fatty acid ester, 55.5 parts of glycerin propoxylate triacrylate as a (meth) acrylate compound, 5.0 parts of 1-hydroxycyclohexyl phenyl ketone and 5.0 parts of methyl-o-benzoyl benzoate as photopolymerization initiators, 3.0 parts of isooctadecyl alcohol as a leveling agent, and 0.5 parts of "TEGO AIREX 920" (manufactured by Evonik) as an antifoaming agent.

[0065] (Preparation of Coater Varnishes 2 to 10) Coater varnishes 2 to 10 were prepared in the same manner as in the preparation of coater varnish 1, except that the types and amounts of each material were changed as shown in Table 1 below.

[0066] [Table 1]

[0067] Example 1 Basis weight 550g / m 2 Coated cardboard (Suncoat, manufactured by Oji Materials) was used as the substrate, and the underprint UV ink was applied to the entire surface to a thickness of approximately 1 μm, and then irradiated with a 160 W / cm high-pressure mercury UV lamp to cure with UV light, forming an underprint ink layer (intermediate layer). FD HS Release OP Varnish, manufactured by Toyo Ink, was used as the material for forming the underprint ink layer. Coater varnish 1 (35°C) was applied to the entire surface of the intermediate layer opposite the substrate so that the dry film thickness was 10 μm, and then the coating was immediately irradiated with a 160 W / cm high-pressure mercury UV lamp for UV curing to form a surface layer, thereby producing a sample of Example 1.

[0068] (Examples 2 to 5 and Comparative Examples 1 to 5) Samples of Examples 2 to 5 and Comparative Examples 1 to 5 were prepared in the same manner as in Example 1, except that the material of the intermediate layer, the type and amount of coater varnish applied, and the type and amount of leveling agent were changed as shown in Table 2 below.

[0069] The results of the above-mentioned measurements and evaluations performed on Examples 1 to 5 and Comparative Examples 1 to 5 are shown in Table 2.

[0070] [Table 2]

[0071] In Table 2, UV HJK Underprint Varnish G and FD HS OP Varnish G manufactured by Toyo Ink were used as varnish 2 and varnish 3, which are materials for forming the intermediate layer, respectively. [Explanation of symbols]

[0072] 1 Film holder 10 Film storage box 11 Winding body 20 Storage section 21 Lid 30 Front panel 31 Bottom plate 32 Rear plate 34 Side panel 40 Lid plate 41 Cover piece F film A area A L1 base material L2 Coater varnish layer

Claims

1. a storage section that can store a roll of film wound around it, the storage section having a front panel, a bottom panel, a rear panel, and side panels, and an open top; a cover portion including a cover plate that can open and close an opening on the top surface of the storage portion, and a cover piece that extends from the cover plate toward a front plate of the storage portion and covers at least a portion of the front plate when closed; A film storage box comprising: The outer surface of the film container of at least one member selected from the group consisting of the cover plate, the cover piece, the bottom plate, and the rear plate has a diffusion coefficient DR at 60°. 60 and diffusivity DR at 20° 20 and (ii) the difference between the peak heights Sp and the peak height S is 150 or less, and (ii) the maximum peak height S p is 0.010 mm or more.

2. The film storage box according to claim 1 , wherein the center plane average value Sa of the region is 0.002 mm or more.

3. Diffusion degree DR of the region 20 The film storage box according to claim 1 , wherein the film density is 100 or more and less than 300.

4. Diffusion degree DR of the region 60 The film storage box according to claim 1 , wherein the film density is 100 or more and 200 or less.

5. The film storage box according to claim 1 , wherein the base material of the film storage box is paper.

6. The film storage box according to claim 1 , wherein the film storage box includes a base material and a surface layer that covers the entire surface of the base material.

7. A film container, wherein the roll is contained in the film container box according to any one of claims 1 to 6.

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