Film storage box and film storage body

Abstract

To provide a film storage box achieving both a comfortable holding feeling and ease of cutting a film.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 surface of at least one of the lid board and the rear board independently includes an embossed area of at least 30 percent. Embossed area is an area with the projection height h between 10 μm or more and 100 μm or less, the projection width W between 200 μm or more and 1000 μm or less, and the projection interval a between 300 μm or more and 3000 μm or less.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 achieving both comfort in the hand and ease of cutting the film.

[0005] The present invention has been made in consideration of the above points, and has as its object to provide a film storage box that is both comfortable to hold and easy to cut film. [Means for solving the problem]

[0006] As a result of extensive research, the inventors discovered that the above problems could be solved by including a predetermined embossed area on the surface of a film storage box, 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: A film storage box, wherein the surface of at least one of the cover plate and the rear plate independently includes 30% or more of the following embossed area. Embossed region: A region in which the projection height h is 10 μm or more and 100 μm or less, the projection width W is 200 μm or more and 1000 μm or less, and the projection spacing a is 300 μm or more and 3000 μm or less. [2] The film storage box according to [1], wherein the ratio of the projection cross-sectional area S to the projection interval a in the embossed region is S / a, which is 5 or more and 25 or less. [3] A film storage box according to [1] or [2], in which the entire surface of the cover plate, corresponding to 7 cm from the center to one end in the longitudinal direction within the plane of the cover plate and 7 cm from the center to the other end, for a total of 14 cm, is defined as region Rc, and 50% or more of the area of ​​region Rc is the embossed region. [4] The film storage box according to any one of [1] to [3], wherein the film contains polyvinylidene chloride. [5] A film container in which the roll is contained in a film container box according to any one of [1] to [4]. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a film storage box that is both comfortable to hold and allows for easy cutting of film. [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] FIG. 10 is a diagram showing an example of an image obtained when an embossed region is observed with a laser microscope. [Figure 7] Fig. 7(A) is a diagram showing an example of the cross-sectional structure of an embossed region, and Fig. 7(B) is a diagram showing an example of curve approximation of the surface shape observed in the cross-sectional structure of the embossed region. [Figure 8] This is an oblique view illustrating an example of a cover plate for a film storage box, with an area corresponding to 7 cm from the center to one end in the in-plane longitudinal direction and 7 cm from the center to the other end, totaling 14 cm, and other areas. [Figure 9] FIG. 9 is a development view of the front surface side of the film storage box of the first embodiment. [Figure 10] 1 is a diagram showing the arrangement of embossed regions (arrangement pattern No. 1) in a development view of the front surface side of the film storage box of Example 1. FIG. [Figure 11] 10 is a development view of the front surface side of the film storage box of Example 2, showing the arrangement of embossed regions (arrangement pattern No. 2). FIG. [Figure 12] FIG. 10 is a diagram showing the arrangement of embossed regions (arrangement pattern No. 3) in a development view of the front surface side of the film storage box of Example 3. [Figure 13] FIG. 10 is a development view of the front surface side of the film storage box of Example 4, showing the arrangement of embossed regions (arrangement pattern No. 4). [Figure 14] FIG. 10 is a development view of the front surface side of the film storage box of Example 5, showing the arrangement of embossed regions (arrangement pattern No. 5). [Figure 15] FIG. 10 is a development view of the front surface side of the film storage box of Example 6, showing the arrangement of embossed regions (arrangement pattern No. 6). [Figure 16]FIG. 10 is a development view of the front surface side of the film storage box of Example 7, showing the arrangement of embossed regions (arrangement pattern No. 7). [Figure 17] FIG. 10 is a development view of the front surface side of the film storage box of Comparative Example 4, showing the arrangement of embossed regions (arrangement pattern No. 8). [Figure 18] FIG. 10 is a development view of the front surface side of the film storage box of Comparative Example 5, showing the arrangement of embossed regions (arrangement pattern No. 9). [Figure 19] FIG. 10 is a development view of the front surface side of the film storage box of Comparative Example 6, showing the arrangement of embossed regions (arrangement pattern No. 10). 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 can store a roll of film, and includes a storage section that has a front panel, a bottom panel, a rear panel, and side panels and is open at the top, a cover panel that can open and close the opening at the top of the storage section, and a lid section that has a cover piece that extends from the cover panel toward the front panel of the storage section and covers at least a portion of the front panel when closed, and at least one surface of the cover panel and the rear panel each independently includes 30% or more of the embossed area described below (hereinafter simply referred to as an "embossed area"). Embossed region: A region in which the projection height h is 10 μm or more and 100 μm or less, the projection width W is 200 μm or more and 1000 μm or less, and the projection spacing a is 300 μm or more and 3000 μm or less. The film storage box of this embodiment is configured in this way, so it is both comfortable to hold and easy to cut the film. While there is room for devising the shape of the saw blade to improve the ease of cutting the film, taking into consideration the effect of the saw blade coming into contact with human skin, it is preferable to improve the ease of cutting the film by other approaches. In this regard, the film storage box of this embodiment employs the above configuration and, through an ergonomic approach, can improve the ease of cutting the film even with a conventional saw blade shape, without having to devise a new shape for the saw blade.

[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 surface of at least one of the cover plate 40 and the rear plate 32 of the film storage box 10 each independently includes an embossed area of ​​30% or more.

[0026] The shape of the embossed region will be described below.

[0027] In the embossed region, the protrusion height h is 10 μm or more and 100 μm or less. When the protrusion height h is within this range, the embossed region contributes to achieving both a comfortable grip and ease of tearing the film. From the same viewpoint as above, the protrusion height h is preferably 11 μm or more and 80 μm or less, and more preferably 14 μm or more and 55 μm or less. The projection height h can be measured based on the method described in the examples below. The projection height h can be adjusted to fall within the above range, for example, by employing a preferred manufacturing method described below.

[0028] In the embossed region, the protrusion width W is 200 μm or more and 1000 μm or less. With the protrusion width W in this range, the embossed region contributes to achieving both a comfortable grip and ease of tearing the film. From the same viewpoint as above, the protrusion width W is preferably 300 μm or more and 900 μm or less, and more preferably 400 μm or more and 850 μm or less. The projection width W can be measured based on the method described in the examples below. The projection width W can be adjusted to fall within the above range, for example, by employing a preferred manufacturing method described below.

[0029] In the embossed region, the protrusion spacing a is 300 μm or more and 3000 μm or less. When the protrusion spacing a is within this range, the embossed region contributes to achieving both a comfortable grip and ease of tearing the film. From the same viewpoint as above, the protrusion spacing a is preferably 500 μm or more and 2500 μm or less, and more preferably 700 μm or more and 2000 μm or less. The projection interval a can be measured based on the method described in the examples below. The projection interval a can be adjusted to fall within the above range, for example, by employing a preferred manufacturing method described below.

[0030] As described above, in this embodiment, the embossed region contributes to both a comfortable grip and ease of tearing the film by having the projection height h, projection width W, and projection spacing a each fall within a predetermined range. In this embodiment, to ensure this effect, at least one surface of the cover plate 40 and the back plate 32 independently includes an embossed region of 30% or more. The surface of only the cover plate 40 may include an embossed region of 30% or more, the surface of only the back plate 32 may include an embossed region of 30% or more, or both the surfaces of the cover plate 40 and the back plate 32 may include an embossed region of 30% or more. When the surfaces of both the cover plate 40 and the back plate 32 include an embossed region of 30% or more, the proportion of the embossed region on the surface of the cover plate 40 and the proportion of the embossed region on the surface of the back plate 32 may be the same or different. In this embodiment, in order to further improve the comfort of holding and the ease of cutting the film, it is preferable that the surface of at least one of the cover plate 40 and the rear plate 32 independently contain an embossed area of ​​40% or more, and more preferably 60% or more.

[0031] FIG. 6 shows an example of an image obtained when an embossed region is observed with a laser microscope. As shown in FIG. 6, the embossed region may have irregularly shaped protrusions in appearance. When measuring the protrusion height h, protrusion width W, and protrusion spacing a of the protrusions constituting the embossed region, as shown in FIG. 6, three arbitrary cross sections (e.g., the x-x' cross section, the y-y' cross section, and the z-z' cross section in the figure) are observed within a single field of view obtained by observation at 20x magnification using a laser microscope. FIG. 7(A) shows an example of the cross-sectional structure of the embossed region in an image obtained in this manner. Two protrusions A1 and A2 are shown in FIG. 7(A). As shown in FIG. 7(A), the protrusion height h can be determined as the vertical length from the lowest point to the highest point constituting one protrusion in the cross-sectional structure. The protrusion width W can be determined as the length corresponding to the base of one protrusion. The protrusion spacing a can be determined as the length between the highest points of two adjacent protrusions. The laser microscope used may be a Keyence VK-X1000, and the observation may be performed at a magnification of 20x. Image processing may be performed to correct tilt, and the projection height h, projection width W, and projection spacing a may be calculated based on the resulting image. Tilt correction may be performed using the Keyence VK-X1000. As an example, when the embossed region is formed using a coater varnish (described later), the protrusion height h, protrusion width W, and protrusion spacing a can be determined as illustrated in FIG. 7B. In the example of FIG. 7B, the surface is curve-approximated in an image obtained from a single cross section, revealing a structure in which three protrusions B1, B2, and B3 are connected. In this structure, the maximum points P2, P4, and P6 of the curve, the minimum points P3 and P5 of the curve, and the rising portions P1 and P7 of the curve are identified. Here, (i) the area defined by one maximum point and two adjacent minimum points, (ii) the area defined by one maximum point and two adjacent rising portions, and / or (iii) the area defined by one maximum point and adjacent minimum points and rising portions are considered to be protrusions. In the example of FIG. 7B, the area defined by P3, P4, and P5 (protrusion B2) corresponds to (i). The above (ii) corresponds to the protrusions A1 and A2 shown in FIG. 7(A). The above (iii) corresponds to the region defined by P1, P2, and P3 (protrusion B1) and the region defined by P5, P6, and P7 (protrusion B3) in the example of FIG. 7(B). The protrusion height h is determined by measuring the vertical distance between the minimum point and the lower point of the rising portion of each protrusion and the maximum point (see h1 to h3 in FIG. 7(B)), and is determined as the average value of three cross-sectional areas. However, a shape that gives a protrusion height h of 3 μm or less determined in this way is not considered a protrusion. The protrusion width W is determined by measuring the parallel distance between two minimum points, the parallel distance between two rising portions, or the parallel distance between a minimum point and a rising portion of each protrusion (see W1 to W3 in FIG. 7(B)), and is determined as the average value of three cross-sectional areas. The projection interval a is determined by measuring the distance between the peaks of two adjacent projections (see a1 to a2 in FIG. 7(B)) and averaging the distances over three cross sections. In addition, when multiple protrusion heights h, protrusion widths W, and / or protrusion intervals a are calculated for an image obtained from one cross section, the protrusion height h, protrusion width W, and / or protrusion interval a for one cross section are specified as their respective average values. When three values ​​h1 to h3 are calculated for one cross section, as in the example of FIG. 7(B), the protrusion height h for one cross section is specified as the average value of h1 to h3. Furthermore, when three values ​​W1 to W3 are calculated for one cross section, as in the example of FIG. 7(B), the protrusion width W for one cross section is specified as the average value of W1 to W3. Furthermore, when two values ​​a1 to a2 are calculated for one cross section, as in the example of FIG. 7(B), the protrusion interval a for one cross section is specified as the average value of a1 to a2.

[0032] In the embossed region, the ratio of the projection cross-sectional area S to the projection spacing a is preferably S / a between 5 and 25, more preferably between 6 and 20, and even more preferably between 7 and 16, from the viewpoint of achieving both a comfortable grip and ease of tearing the film. The value of S / a can be adjusted to fall within the above range, for example, by employing a preferred production method described below.

[0033] The arrangement of the embossed areas will be described below.

[0034] 8 is a perspective view illustrating region Rc of cover plate 40 of film storage box 10, which corresponds to a total of 14 cm, 7 cm from the center to one end in the in-plane longitudinal direction and 7 cm from the center to the other end, and other regions 40a and 40c. Compared to regions 40a and 40c, region 40b tends to have a greater effect on the comfort of holding and the ease of tearing the film. From this perspective, it is preferable that 50% or more of the area of ​​region Rc be embossed, more preferably 60% or more of the area of ​​region Rc be embossed, and even more preferably 70% or more of the area of ​​region Rc be embossed.

[0035] A method for forming the embossed region will be described below.

[0036] The method for forming the embossed region is not particularly limited as long as it results in a region in which the protrusion height h is 10 μm or more and 100 μm or less, the protrusion width W is 200 μm or more and 1000 μm or less, and the protrusion spacing a is 300 μm or more and 3000 μm or less. For example, the embossed region can be formed by the following method. First, a primer is coated or printed on the surface of the base material of the film storage box 10. Next, the coated or printed primer is cured to form a primer layer. In addition, a coating agent (hereinafter also referred to as "coater varnish") is coated or printed on the primer layer. Furthermore, the coated or printed coater varnish is cured to form a coater varnish layer. Here, the compatibility (repellency) of each layer changes depending on the type and amount of primer and coater varnish, allowing the embossed shape to be adjusted, and as a result, the desired embossed region tends to be formed. In addition, the embossed region tends to be formed by adjusting the curing timing of the coater varnish layer. The timing of curing 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. The embossed area may be formed by applying or printing a coater varnish in a protruding shape depending on the shape of the printing plate. As an example, the use of a primer (forming a base layer) may be omitted, and the embossed area may be formed by applying or printing a coater varnish using a printing plate of the desired shape. Alternatively, the embossed area may be formed directly on the substrate depending on the shape of the cutting die. Alternatively, the substrate may be heat embossed to form the embossed areas. In this embodiment, fine embossed areas can be formed by applying or printing a coater varnish onto the base layer, and by making adjustments such as appropriately selecting the shapes of the printing plate and cutting die, it tends to be possible to form an embossed shape with regular, relatively large protrusions. In this embodiment, when the surface of at least one of the cover plate and the rear plate is viewed in plan, the shape of the boundary (boundary line) between an embossed region and a region not corresponding to the embossed region (non-embossed region) is not particularly limited. The shape of such a boundary may be, but is not limited to, a triangular, rectangular, or polygonal shape with pentagons or more sides, or may be a circular or elliptical shape, or may be a special shape that is an appropriate combination of these shapes. Examples of such a special shape include, but are not limited to, a shape included in the embossed region located in the center of the cover plate 40 shown in FIG. 19 (described later).

[0037] 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. As long as at least one surface of the cover plate and the back plate each independently includes an embossed area of ​​30% or more, the base material may be embossed, printed, laminated with polyethylene, etc.

[0038] The base can be, for example, an electron beam or ultraviolet curable ink. The electron beam or ultraviolet curable ink can be prepared by adding 0 to 10% by mass of polyethylene wax or reactive silicone as an auxiliary to a base compound containing a mixture of polymers, oligomers, monomers, photopolymerization initiators, etc. This auxiliary can impart liquid repellency to the base.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] The photopolymerization initiator may be used in combination with a photosensitizer, such as n-butylamine, n-dibutylamine, triethylamine, triethylenetetramine, or triethanolamine.

[0043] There is no particular limitation on the method for applying or printing the primer onto the substrate surface of the film storage box 10. The primer should have a dry film thickness of approximately 1 μm to 10 μm and a coating amount of 1 g / m 2 ~10g / m 2 The coating or printing may be carried out in an amount such that

[0044] When printing the primer, offset printing (lithographic printing) or gravure printing may be used, for example. When applying the primer, the primer may be applied solidly to the area where the embossed area is to be formed, or the primer may be applied in a predetermined pattern to the area. When applying the primer in a predetermined pattern to the area where the embossed area is to be formed, a screen mask or the like may be used.

[0045] 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.

[0046] The coater varnish applied onto the primer may contain an ultraviolet-curable resin or an electron beam-curable resin, or 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. 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.

[0047] 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, an embossed region tends to be formed. From the viewpoint of facilitating the formation of an embossed region, the content of isooctadecyl alcohol is preferably 2 to 4 parts per 100 parts of coater varnish.

[0048] When applying the coater varnish, it may be applied solidly to the area where the embossed area is to be formed, or it may be applied to the area in a predetermined pattern. When applying the coater varnish to the area where the embossed area is to be formed in a predetermined pattern, a screen mask or the like may be used.

[0049] 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.

[0050] 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.

[0051] The film F is, for example, a wrap film, and may be a film containing polyvinylidene chloride.

[0052] Film F may be, for example, a film having adhesive properties. 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.

[0053] 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. The embossed area is not limited to being formed on the lid plate and rear plate, but may be formed in one or more locations on other positions, such as the cover piece or bottom plate. The embossed area may also be provided on the side plate, front plate, etc., other than the lid plate, cover piece, bottom plate, and rear plate. The film F is not limited to wrap film for food packaging and may be aluminum foil, cooking sheet, etc. [Example]

[0054] 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.

[0055] (embossed area) Samples prepared in the examples and comparative examples described below were observed at 20x magnification using a laser microscope (Keyence VK-X1000), and tilt correction was performed using image processing. That is, three cross sections were randomly taken in an area of ​​3.6 mm x 6.4 mm on each of the cover plate and rear plate, and the protrusion height h, protrusion width W, and protrusion spacing a were determined for each cross section as follows. In an image obtained from one cross section, the surface shape of the cover plate or rear plate was curve-approximated, and (i) the area defined by one maximum point and two adjacent minimum points, (ii) the area defined by one maximum point and two adjacent rising portions, and (iii) the area defined by one maximum point and an adjacent minimum point and rising portion were treated as protrusions. The protrusion height h was determined by measuring the vertical distance between the minimum point and the lowest point of the rising portion of each protrusion and the maximum point (see, for example, h1 to h3 in Figure 7(B)), and determining it as the average value of three cross sections. Note that shapes that give a protrusion height h of 3 μm or less determined in this way were not treated as protrusions. The protrusion width W was determined by measuring the parallel distance between two minimum points, the parallel distance between two rising portions, or the parallel distance between a minimum point and a rising portion in each protrusion (see, for example, W1 to W3 in Figure 7(B)), and determining it as the average value of three cross-sectional areas. The protrusion interval a was determined by measuring the distance between the peaks of two adjacent protrusions (see, for example, a1 to a2 in FIG. 7(B)) and averaging the distances over three cross sections. In addition, when multiple protrusion heights h, protrusion widths W, and / or protrusion spacing a are calculated in an image obtained from a single cross-section, the protrusion heights h, protrusion widths W, and / or protrusion spacing a in a single cross-section were determined as their respective average values. Furthermore, the projection cross-sectional area S was calculated from the obtained projection height h and projection width W using the following formula. S = projection height h × projection width W / 2 × 3.14 / 2 From the above, the area where the protrusion height h is 10 μm or more and 100 μm or less, the protrusion width W is 200 μm or more and 1000 μm or less, and the protrusion spacing a is 300 μm or more and 3000 μm or less was defined as the embossed area, and the proportion of the embossed area in each of the cover plate and the rear plate was calculated.

[0056] (Measurement of embossing ratio r) One surface of each sample prepared in the Examples and Comparative Examples described below was cut out and its weight A was measured. The portion corresponding to the embossed area was cut out and the weight B of the entire portion was measured. The embossing ratio r was calculated using the following formula. r=B / A×100

[0057] (Measurement of embossing ratio rc) One surface of each sample prepared in the Examples and Comparative Examples described below was cut out, and the entire surface, corresponding to a total of 14 cm, measuring 7 cm from the center to one end in the longitudinal direction of the surface and 7 cm from the center to the other end, was designated as region Rc, and its weight Ac was measured. A portion of region Rc corresponding to the embossed region was cut out, and the weight Bc of the entire corresponding portion was measured. The embossing ratio rc was calculated using the following formula. rc=Bc / Ac×100

[0058] (evaluation) A commercially available wrap film (manufactured by Asahi Kasei Home Products Corporation, trade name: Saran Wrap) sold in Japan was placed inside the samples prepared in the Examples and Comparative Examples described below to prepare evaluation packages. The evaluation packages were left to stand for 2 hours in a constant temperature room at 23±2°C and 50±5% RH to condition. Then, under the same conditions, 100 subjects aged 25 to 64 pulled out approximately 40 cm of the wrap film and cut it with a saw blade (the same saw blade as the commercially available product) 10 times for each evaluation package. The 100 subjects were asked about the comfort of holding and ease of cutting. The results were evaluated on a 5-point scale: "very good," "good," "average," "poor," and "very poor." A sensory evaluation was conducted based on the following criteria. (standard) ◎: Over 90 people said it was very good ○: "Very good": 80 to 90 people □: "Very good": 70 to 80 people △: "Very good": 60 to 70 people ×: Less than 60 people answered "Very good"

[0059] Example 1 Basis weight 550g / m 2 A coated cardboard (Suncoat, manufactured by Oji Materials) was used as a base material and cut into a shape similar to the development of the film storage box 10 shown in FIG. 9 . In the development of the film storage box 10 shown in FIG. 9 , the base material thus obtained had a back panel 36 (not shown) arranged on the top of the front panel 30 (opposite the bottom panel 31). Next, a primer (UV Peel-Off OP Varnish UP-2, manufactured by T&K TOKA) was applied to the surfaces of the rear panel 32 and the cover panel 40 to form a base layer. A UV-curable coater varnish (UV Coat Varnish HTA-W, manufactured by T&K TOKA) was applied to the base layer and cured by irradiating it with two 175 W / cm UV lamps to form a coater varnish layer with a predetermined embossed area ( FIG. 10 ). The film storage box 10 was then assembled to have a shape similar to that shown in FIG. 8 , and used as a sample of Example 1.

[0060] Examples 2 to 7 Samples of Examples 2 to 7 were produced in the same manner as in Example 1, except that the coating patterns of the coater varnish on the cover plate and rear plate were changed as shown in Table 1 (Nos. 2 to 7; see Figures 11 to 16).

[0061] Example 8 In Example 8, the embossed regions were formed in the same arrangement as the embossed regions in Example 2, except for the following points. The primer used in Example 2 was changed (changed to UV peelable OP varnish A-3 manufactured by T&K TOKA), and the projection spacing was adjusted to be larger than the projection spacing a in Example 2 to form an embossed region. A sample of Example 8 was produced in the same manner as Example 2, except that the embossed region was formed as described above.

[0062] Example 9 In Example 9, the embossed regions were formed in the same arrangement as the embossed regions in Example 2, except for the following points. An embossed area was formed on the printing plate using only the coater varnish without using the primer used in Example 2. That is, the embossed area was formed so that the protrusions formed from the coater varnish had shapes corresponding to the recesses formed on the surface of the printing plate. A sample of Example 9 was produced in the same manner as Example 2, except that the embossed region was formed as described above.

[0063] Example 10 In Example 10, the embossed regions were formed in the same arrangement as the embossed regions in Example 2, except for the following points. The type of primer used in Example 2 was changed (UV Peel-Off OP Varnish UP-200 manufactured by T&K TOKA Co., Ltd.), and the spacing was adjusted to be smaller than the projection spacing a in Example 2 to form an embossed region. A sample of Example 10 was produced in the same manner as Example 2, except that the embossed region was formed as described above.

[0064] Example 11 In Example 11, the embossed regions were formed in the same arrangement as the embossed regions in Example 2, except for the following points. An embossed area was formed using a printing plate (a printing plate with a different shape from that used in Example 9) using only the coater varnish without using the primer used in Example 2. That is, the embossed area was formed so that the protrusions formed from the coater varnish had a shape corresponding to the recesses formed on the surface of the printing plate. A sample of Example 11 was prepared in the same manner as Example 2, except that the embossed region was formed as described above.

[0065] (Comparative Example 1) A sample of Comparative Example 1 was produced in the same manner as in Example 1, except that no coater varnish was applied and no predetermined embossed region was formed.

[0066] (Comparative Example 2) A sample of Comparative Example 2 was prepared in the same manner as Example 1, except that the application amount setting value of the primer was increased and the application pattern of the coater varnish on the cover plate and rear plate was changed as shown in Table 1 (No. 1; see Figure 10).

[0067] (Comparative Example 3) In Comparative Example 3, the embossed regions were formed in the same arrangement as the embossed regions in Example 1, except for the following points. An embossed area was formed using a printing plate (a printing plate with a different shape from those used in Examples 9 and 11) using only the coater varnish without using the primer used in Example 1. That is, the embossed area was formed so that the protrusions formed from the coater varnish had a shape corresponding to the recesses formed on the surface of the printing plate. A sample of Comparative Example 3 was produced in the same manner as in Example 1, except that the embossed region was formed as described above.

[0068] (Comparative Examples 4 to 5) Samples of Comparative Examples 4 and 5 were produced in the same manner as in Example 1, except that the coating patterns of the coater varnish on the cover plate and rear plate were changed as shown in Table 1 (Nos. 8 and 9; see FIGS. 17 and 18).

[0069] (Comparative Example 6) A sample of Comparative Example 6 was produced in the same manner as in Example 9, except that the coating pattern of the coater varnish on the cover plate and rear plate was changed as shown in Table 1 (No. 10; see FIG. 19).

[0070] The results of the above-mentioned measurements and evaluations performed on Examples 1 to 11 and Comparative Examples 1 to 6 are shown in Table 1.

[0071] [Table 1] [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

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: A film storage box, wherein at least one surface of the cover plate and the rear plate independently includes 30% or more of the following embossed areas: Embossed region: A region in which the projection height h is 10 μm or more and 100 μm or less, the projection width W is 200 μm or more and 1000 μm or less, and the projection spacing a is 300 μm or more and 3000 μm or less.

2. 2. The film storage box according to claim 1, wherein a ratio of a cross-sectional area S of the projections to a distance a between the projections in the embossed region is S / a, which is 5 or more and 25 or less.

3. A film storage box as claimed in claim 1, wherein when the entire area of ​​the cover plate, which corresponds to 7 cm from the center of the cover plate to one end in the longitudinal direction within the plane and 7 cm from the center to the other end, is defined as region Rc, 14 cm in total, more than 50% of the area of ​​region Rc is the embossed region.

4. 10. The film containment box of claim 1, wherein the film comprises polyvinylidene chloride.

5. A film container, wherein the roll is contained in the film container box according to any one of claims 1 to 4.

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