Film storage box and film storage body

Abstract

To provide a storage box for film that is hard to slip and reduces the stickiness while keeping the strength.SOLUTION: A storage box for film 10 can house a wound body 11 with film F wound on and includes: a storage part 20 that has a front plate 30, a bottom plate 31, a back plate 32, and side plates 34 and has a top face opening; a lid plate 40 that can open and close the opening of the top face of the storage part 20; and a lid part 21 that has a sub-lid piece 41 that covers at least a part of the front plate 30 when extending from the lid plate 40 to the side of the front plate 30 and closing. A friction adjustment area A is formed on the surface of at least one of the lid plate 40, the sub-lid piece 41, the bottom plate 31, and the back plate 32, where the coefficient of static friction with a touch sense contact piece is 0.50 or over and the coefficient of dynamic friction is 0.30 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 food ingredients, dishes, or tableware such as plates together with the food. Wrap films are typically wound in a roll (rolled body) around a long cylindrical core and stored in a long, rectangular film storage box.

[0003] The film storage box has a storage section that can store a roll and has an open top, and a lid section that opens and closes the opening on the top of the storage section. The storage section is composed of a front plate, a bottom plate, a rear plate, and side plates, etc., and the lid section is composed of a lid plate that covers the opening on the top of the storage section, a cover piece that extends from the lid plate towards the front plate, and a cutting blade provided at the tip of the cover piece, etc.

[0004] When using the wrap film, the user holds the film storage box with his / her left hand, opens the lid with his / her left hand, and then picks up and pulls out the wrap film with his / her right hand. At this time, the roll rotates inside the storage box, and the wrap film is peeled off from the roll and pulled out to the outside of the film storage box. After pulling out the required length of wrap film, the user closes the lid with his / her left hand, cuts the wrap film using a cutting blade, and then uses the cut wrap film on tableware, etc.

[0005] However, as described above, when using wrap film, complex actions are repeated, and there is a possibility that the user may lose their grip and drop the film storage box. Therefore, Patent Document 1 discloses a method of providing a step portion on the side of the package storage box, and Patent Document 2 discloses a method of providing a group of protrusions on the surface of the roll storage box. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2010-265032 A [Patent Document 2] JP 2015-182816 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, the method described in Patent Document 1 may reduce the strength of the film storage box, and the method described in Patent Document 2 may cause the film storage box to feel sticky when held in the hand.

[0008] The present invention has been made in consideration of the above points, and has an object to provide a film storage box that is non-slip, maintains its strength, and has a low sticky feel. [Means for solving the problem]

[0009] As a result of extensive research, the inventors have found that the above-mentioned problems can be solved by forming an area on the surface of a film storage box in which the static friction coefficient is greater than a predetermined value and the kinetic friction coefficient is less than a predetermined value, and have thus completed the present invention.

[0010] (1) A storage box for a film, the storage box comprising: a storage section capable of storing a roll of film wound thereon, the storage section having a front plate, a bottom plate, a rear plate, and side plates, and an open top surface; a cover plate capable of opening and closing the opening at the top surface of the storage section; and a lid section having a cover piece extending from the cover plate towards the front plate of the storage section and covering at least a portion of the front plate when closed; wherein the surface of at least one of the cover plate, cover piece, bottom plate, and rear plate has an area having a static friction coefficient of 0.50 or more and a dynamic friction coefficient of 0.30 or less with a tactile contact. (2) The film storage box according to (1), wherein the sum of the core level difference Sk and the protruding peak height Spk in the region, as defined by ISO 25178, is 13 μm or more. (3) A film storage box as described in (1) or (2), in which the minimum autocorrelation length Sal in the region, as defined by ISO 25178, is 300 μm or less. (4) A film container in which the roll is contained in the film container box according to any one of (1) to (3). (5) The film container according to (4), wherein the static friction coefficient of the film with a tactile contact is 2.0 or more. Effect of the Invention

[0011] According to the present invention, it is possible to provide a film storage box that is not slippery, maintains its strength, and has a low sticky feel. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is a perspective view showing an example of a configuration of a film container. [Diagram 2] 4 is a perspective view showing the film container when the cover is open. FIG. [Diagram 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. [Diagram 5] FIG. 2 is a front view of the film storage box with the tear strip removed. [Figure 6] 13 is a development view of a film storage box showing another example of a friction adjustment region. FIG. [Figure 7] FIG. 4 is a diagram showing an example of a friction adjustment region. [Figure 8] This is an image diagram of Sk and Spk defined in ISO 25178. [Figure 9] 1 is a table showing various values ​​of the friction adjustment region and an evaluation of ease of holding of the embodiment. [Figure 10] FIG. 2 is a diagram showing a printing pattern of a base agent or a coating agent used in the examples. [Figure 11] FIG. 2 is a diagram showing a printing pattern of a base agent or a coating agent used in the examples. [Figure 12]4 is a graph showing preferred ranges of static and dynamic friction coefficients in the friction adjustment region. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Note that the same elements are given the same reference numerals and duplicated explanations will be omitted.

[0014] FIG. 1 is a perspective view showing an example of a film container 1 according to the present embodiment. FIG. 2 is a perspective view of the film container 1 in an unsealed state. FIG. 3 is a perspective view showing the film container 1 and the roll 11. In this specification, the terms "upper" and "lower" in the configuration of the film container 1 and the film container 10 refer to the position shown in FIG. 1, that is, the position of the film container 10 with a bottom plate 31 (described later) facing down and a cover plate 40 facing up. In addition, the front plate 30 side of the film container 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 container 10 is referred to as the "X direction", the front-rear direction perpendicular to the longitudinal direction X of the film container 10 is referred to as the "Y direction", and the up-down direction of the film container 10 is referred to as the "Z direction".

[0015] As shown in FIGS. 1 to 3, the film container 1 has a film container box 10 and a roll 11 of the film F.

[0016] The film storage box 10 has, for example, an elongated rectangular parallelepiped shape as a whole. The material constituting the film storage box 10 is, for example, paper such as cardboard, coated cardboard, corrugated cardboard, etc., but is not limited thereto, and paper or other materials known in the industry may be appropriately selected and used.

[0017] Fig. 4 is a development 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 for opening and closing the opening at the top of storage section 20.

[0018] 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 rear panel 36, and rear panel side pieces 37.

[0019] In the development view of Fig. 4, the back panel 36, the front panel 30, the bottom panel 31 and the back 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 back panel side pieces 35 have a square shape and are connected to both ends of the back 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.

[0020] The front plate 30 has a wavy cut 30a formed along both ends in the left-right direction X. A temporary fastening member Q for temporarily fastening an end of the film F is provided on the surface of the front plate 30. The back plate 36 has a cut 36a formed therein, which is connected to a connection line (fold line) between the back plate 36 and the front plate 30.

[0021] The storage section 20 is formed in a rectangular parallelepiped shape with an open top as shown in FIG. 3. The front plate 30, the bottom plate 31, the rear plate 32, and the side plate 34 constitute five walls of the storage section 20 other than the top surface. The back plate 36 is folded back inside the front plate 30 and disposed on the back surface of the front plate 30. The upper part of the front plate 30 above the cut 30a is separated from the lower part and rises forward. The upper part of the back plate 36 above the cut 36a is separated from the lower part and rises backward. The rear plate side piece 35 is folded back inside the side plate 34 to cover the inner surface of the side plate 34. The front plate side piece 33 and the rear plate side piece 37 are folded back to the inner surface of the side plate 34 and are interposed between the rear plate side piece 35 and the side plate 34.

[0022] As shown in the development view of FIG. 4, the lid portion 21 has a lid plate 40, a cover piece 41, a lid plate side piece 42, a cover side piece 43, an opening piece 44, and the like.

[0023] The cover plate 40 and the cover piece 41 have a rectangular shape and are connected to each other in the front-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 piece 42 has a square shape and is connected to both ends of the cover plate 40 in the left-right direction X. The cover side piece 43 has a square shape and is connected to both ends of the cover piece 41 in the left-right direction X. The opening piece 44 is formed in a belt shape and is connected to the tip of the cover piece 41 so that it can be cut off. A connection line (cutting line) P1 is formed between the cover piece 41 and the opening piece 44. The center of the cutting line P1 in the left-right direction X is curved convexly toward the opening piece 44 side, and both sides are curved convexly toward the cover piece 41 side. That is, the cutting line P1 is formed in a substantially M-shape.

[0024] The cover plate 40 extends from the upper end of the rear plate 32 toward the front plate 30 as shown in Fig. 3, and covers the upper surface of the storage section 20 and closes the opening when the lid part 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 lid part 21 is closed. As shown in Fig. 3, the cover side piece 43 is folded back inside the cover plate side piece 42 and covers the inner surface of the cover plate side piece 42.

[0025] 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.

[0026] The cutting blade 50 is formed, for example, in a saw blade shape. 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 line, a V-shape, an arch shape, or the like. The cutting blade 50 may also be disposed on the ridge between the bottom plate 31 and the front plate 30.

[0027] A friction adjustment area A having a static friction coefficient of 0.50 or more and a dynamic friction coefficient of 0.30 or less with respect to a tactile contact is formed on the surface of at least one of the cover plate 40, cover piece 41, bottom plate 31, and rear plate 32 of the film storage box 10.

[0028] The static and dynamic friction coefficients with the tactile contactor were measured by the following method. That is, the friction adjustment area A was fixed to the table surface of the friction measuring machine, and the tactile contactor was moved 40 mm at 10 mm / sec on the measurement surface with a load of 100 g, to measure the friction force between the friction adjustment area A and the tactile contactor, and the static and dynamic friction coefficients were calculated. The measurements were performed in an atmosphere of 23°C and 50% RH, and the average values ​​were calculated for five tests. The tactile contactor was a contactor for friction measurement that imitated a geometric fingerprint pattern and had hardness equivalent to that of a fingertip.

[0029] The friction adjustment region A is formed over the entire surface of the cover plate 40, the cover piece 41, the bottom plate 31 and the rear plate 32, or over 90% or more of the entire surface of each part, as shown in Fig. 4. For example, the friction adjustment region A of the cover piece 41 is formed in the range close to the cut line P1 between the cover piece 41 and the opening piece 44, excluding the band-shaped region R1 along the cut line P1.

[0030] 6, the friction adjustment area A may be formed in a part of the cover plate 40 and the rear plate 32. For example, the friction adjustment area A is formed in a central area A1 when the cover plate 40 and the rear plate 32 are divided into thirds in the left-right direction X, and in areas 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.

[0031] The central area A1 of the cover plate 40 and the rear plate 32 mainly contributes to preventing slippage during use of the film container 1. When using the film container 1, it is assumed that the central part of the film container 1 in the left-right direction X is grasped with one hand, and the film F is pulled out from the roll 11 with the other hand. Therefore, the length in the left-right direction X of the central area A1 of the cover plate 40 and the rear plate 32 may be about the width of a standard adult palm to about twice the width of the palm, and is preferably, for example, about 70 mm to 200 mm. The length in the left-right direction X of the central area A1 of the cover plate 40 and the rear plate 32 may be about 1 / 3 to 1 / 2 of the total length in the left-right direction X of the cover plate 40 and the rear plate 32, respectively.

[0032] Areas A2 at both left and right ends of cover plate 40 and rear plate 32 mainly contribute to preventing slippage when film container 1 is removed from a storage location or when film container 1 is handed over. 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.

[0033] The ratio of the area A1 and the area A2 to the total area of ​​the cover plate 40 or the rear plate 32 is not particularly limited, but is preferably 30% or more and 100% or less. When it is in this range, the sticky feeling when gripping the film storage box 10 is sufficiently reduced, and the effect of easy holding is sufficiently achieved.

[0034] Friction adjusting region A may have minute projections and recesses that appear irregular, for example, as shown in FIG.

[0035] The friction adjustment area A is formed so that the sum of the core level difference Sk and the protruding peak height Spk, as specified in ISO 25178, is 13 μm or more. The surface quality (surface roughness measurement) of ISO 25178 is an international standard that defines the evaluation method of surface roughness. In ISO 25178, Sk represents the height of the core, and Spk represents the height of the protruding peak. FIG. 8 is an image diagram showing Sk and Spk in ISO 25178, in which Svk in the diagram is the height of the protruding valley, Smr1 is the load area ratio that separates the protruding peak and the core, and Smr2 is the load area ratio that separates the protruding valley and the core.

[0036] The friction adjustment region A is formed so that the minimum autocorrelation length Sal, as specified by ISO 25178, is 300 μm or less. In ISO 25178, the minimum autocorrelation length Sal represents the closest lateral distance at which the autocorrelation of the surface decays to a correlation value s (0≦s<1). The Sal of the surface treatment layer is an index that indicates the presence or absence of points on the surface where the height of the protrusions changes suddenly. The flatter the surface, the larger Sal is, and the more protrusions there are, the smaller Sal is.

[0037] Next, a method for forming the friction adjustment area A will be described. First, a liquid-repellent base agent is applied or printed on the surface of the film storage box 10. Next, a coating agent is applied or printed on the liquid-repellent base agent. At this time, the coating agent is repelled by the liquid-repellent base agent, forming fine irregularities, and the friction adjustment area A is formed.

[0038] The liquid-repellent undercoat agent may be, for example, an electron beam or ultraviolet ray curable ink. For the electron beam or ultraviolet ray curable ink, a base material containing at least a polymer, a monomer, and a photopolymerization initiator is used, to which polyethylene wax and reactive silicone are added as auxiliary agents in an amount of 0 to 10% by mass relative to the base material. The auxiliary agents are added to make the ink liquid-repellent.

[0039] Examples of the polymers that are the main components of the inks used as the base material include so-called monofunctional monomers that have 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 applies below), 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 1,6-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 multifunctional 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] Furthermore, as the oligomer, oligomers such as unsaturated polyesters, polyester (meth)acrylate, polyether (meth)acrylate, polyol (meth)acrylate, epoxy (meth)acrylate, and urethane (meth)acrylate can also be used.

[0041] There is no need to set any particular restrictions on the photopolymerization initiator of the main component, but it is preferable that the material is soluble in the polymerizable composition, and may be, for example, 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, 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, triethanolamine, etc.

[0043] There is no particular limitation on the method for coating or printing the liquid-repellent base agent on the surface of the film storage box 10. The liquid-repellent base agent has a dry film thickness of about 1 to 10 μm and a thickness of 1 to 10 g / m 2 It is preferable that the coating or printing is performed in such an amount that

[0044] When printing the liquid-repellent base agent, for example, offset printing (lithographic printing) or gravure printing may be used. When applying the liquid-repellent base agent, it may be applied solidly to the area forming the friction adjusting region A, or it may be applied in a predetermined pattern to the area. When applying in a predetermined pattern to the area forming the friction adjusting region A, a screen mask or the like may be used.

[0045] When the liquid repellent base agent is an ink that can be cured by electron beam or ultraviolet light, the base agent is cured by irradiating ultraviolet light or electron beam, whereas when the liquid repellent base agent is not an ink that can be cured by electron beam or ultraviolet light, the base agent is cured by drying or the like.

[0046] The coating agent to be applied onto the undercoat is not particularly limited as long as it produces a cissing phenomenon when applied or printed, and a coating agent that meets this purpose can be appropriately selected. The coating agent may contain an ultraviolet-curable resin or an electron beam-curable resin, and such a coating agent is a mixture of at least a polymer, a monomer, a photopolymerization initiator, and the like, similar to the main agent of the ink used in the liquid-repellent undercoat. Furthermore, a surface conditioner may be added to this as an auxiliary agent. Examples of surface conditioners include cellulose-based leveling agents and natural wax-based lubricants.

[0047] When applying the coating agent, the coating agent may be applied in a solid manner to the region that forms the friction adjusting region A, or the coating agent may be applied in a predetermined pattern to the region. When applying the coating agent in a predetermined pattern to the region that forms the friction adjusting region A, a screen mask or the like may be used.

[0048] When an ultraviolet-curable resin is used as the coating agent, the coating agent is irradiated with ultraviolet rays using a known ultraviolet irradiation device (mercury lamp, ultraviolet lamp, incandescent lamp, halogen lamp, etc.) to cure the coating agent. When an electron beam-curable resin is used as the coating agent, the coating agent is irradiated with electron beams using a known device capable of irradiating various electron beams, radiation, etc. to cure the coating agent.

[0049] As described above, by applying or printing the coating agent onto a liquid-repellent base agent, the difference in the properties of the two materials allows the coating agent to form convex portions in the desired arrangement and size, and a friction adjustment area A is formed on the surface of the film storage box 10, which has a static friction coefficient of 0.50 or more and a kinetic friction coefficient of 0.30 or less with the tactile contact.

[0050] In the above example, the method for forming the friction adjusting region A uses a liquid-repellent base agent, but the method is not limited to this. For example, the friction adjusting region A may be formed by a method such as UV nanoimprinting, in which a pattern on a mold is pressed against a UV-curable resin and the resin is irradiated with ultraviolet light to harden the resin, thereby replicating the pattern, or thermal nanoimprinting, in which a pattern on a mold is pressed against a thermoplastic resin with strong pressure, and the pattern is replicated by heating and then cooling.

[0051] 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 inside of the film storage box 10 in the left-right direction X.

[0052] Film F is a so-called wrap film and has adhesive properties. The static friction coefficient of Film F with the tactile contact is 2.0 or more.

[0053] According to this embodiment, a friction adjustment area A having a static friction coefficient of 0.50 or more and a dynamic friction coefficient of 0.30 or less with the tactile contacts is formed on the surface of at least one of the cover plate 40, the cover piece 41, the bottom plate 31, and the rear plate 32. The static friction coefficient with the tactile contacts is related to the gripping ability when holding the film storage box 10, and the dynamic friction coefficient with the tactile contacts is related to the finger release ability when letting go of the film storage box 10. This is because the tactile contacts are contacts that imitate a geometric fingerprint pattern and have hardness equivalent to the fingertip, and a frictional sensation corresponding to the tactile sensation of the finger pad structure of a person handling the film storage box 10 can be obtained. Therefore, by forming the friction adjustment area A on the surface of the film storage box 10, which has a static friction coefficient of 0.50 or more and a dynamic friction coefficient of 0.30 or less with respect to the tactile contact, when the film storage box 10 is used, the grip is good and the film storage box 10 is not slippery when the user grips the film storage box 10 with force, and the film storage box 10 is easy to release from the fingers when the film storage box 10 is changed over by hand, reducing the sticky feeling. In addition, since no step or the like is formed on the surface of the film storage box 10, the strength is also maintained. As a result, a film storage box 10 that is not slippery, maintains its strength, and is less sticky can be realized.

[0054] The static friction coefficient with the tactile contact is more preferably 0.55 or more, and even more preferably 0.60 or more. There is no particular upper limit to the static friction coefficient, but it is usually 1.0 or less. The dynamic friction coefficient with the tactile contact is more preferably 0.25 or less, and even more preferably 0.20 or less. There is no particular lower limit to the dynamic friction coefficient, but it is usually 0.1 or more.

[0055] The friction adjustment area A is formed so that the sum of the core level difference Sk and the protruding peak height Spk, as defined by ISO 25178, is 13 μm or more. Since the height of the unevenness of an average fingerprint is about 50 μm, the sum of the core level difference Sk and the protruding peak height Spk of 13 μm or more exceeds 1 / 4 of the height of the unevenness of the fingerprint. This makes it easier for the unevenness of the fingerprint to be caught by the friction adjustment area A, improving the grip of the film storage box 10.

[0056] The friction adjustment region A is formed so that the value of the minimum autocorrelation length Sal defined by ISO 25178 is 300 μm or less. Since the distance between the ridges of a fingerprint is about 400 μm, a minimum autocorrelation length Sal value of 300 μm or less provides a slope and clearance that allows the unevenness of the friction adjustment region A to be sufficiently caught by the unevenness of the fingerprint. This makes it easier for the unevenness of the fingerprint to be caught by the friction adjustment region A, improving the grip of the film storage box 10.

[0057] The static friction coefficient of film F with the tactile contact is 2.0 or more. This allows film F to be firmly caught by a finger, allowing film F to be conveniently pulled out. The static friction coefficient of film F with the tactile contact is more preferably 2.5 or more, and even more preferably 3.0 or more.

[0058] Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to such an example. It is clear that a person skilled in the art can come up with various modified or altered examples within the scope of the ideas described in the claims, and it is understood that such examples also naturally belong to the technical scope of the present invention.

[0059] 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 a side plate, and the lid section 21 may have at least a cover plate and a cover piece. The friction adjustment area A may be provided in at least one of the cover plate, cover piece, bottom plate, and rear plate, and may be provided in multiple locations among the cover plate, cover piece, bottom plate, and rear plate. The friction adjustment area A may also be provided on the side plate, front plate, etc. other than the cover plate, cover piece, bottom plate, and rear plate. The film F is not limited to a wrap film for food packaging, and may be aluminum foil, cooking sheet, etc. EXAMPLES

[0060] (Method of measuring friction of storage box) The friction of the friction adjustment area of ​​the film storage box was measured using a friction measuring machine "TL201Tt" manufactured by Trinity Lab. The tactile contactor used was manufactured by Trinity Lab, purchased within one year, and was free of dirt and wear. A sample piece cut out from the friction adjustment area of ​​the film storage box with a size of 15 mm x 50 mm and a length of 50 mm in the measurement direction was fixed to a SUS plate, and the SUS plate was then fixed to the table surface of the friction measuring machine. 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 maximum load when the tactile contactor started to move was taken as the static friction force, and this was divided by the load of 100 g to calculate the static friction coefficient. The peak part of the static friction force was excluded, and the average load from the start of the relative slippage movement between the contact surfaces to 30 mm was taken as the kinetic friction force, and this was divided by the load of 100 g to calculate the kinetic friction coefficient. The measurements were performed in an atmosphere of 23°C and 50% RH. A total of five measurements were performed using different samples, and the average of the five measurements was used as the measured value. If it is not possible to cut out a piece with a length of 50 mm in the measurement direction, the length may be adjusted as appropriate. In that case, the kinetic friction coefficient may be calculated by excluding the peak portion of the static friction force, and dividing the average load from the start of the relative shear movement between the contact surfaces to the point where the friction force of the measurement area is obtained by the kinetic friction force, by a load of 100 g.

[0061] (Surface roughness measurement method) The surface roughness of the friction adjustment area of ​​the film storage box was measured using a Keyence laser microscope "VK-X1000". A sample piece cut out to a size of 10 mm x 10 mm from the friction adjustment area of ​​the film storage box was placed on the stage, and the objective lens was selected at 20x, laser confocal mode, measurement size "standard", measurement quality "high precision", and pitch "0.75 μm" were selected, and height measurements were performed. If necessary, the samples were laminated and measured so that at least 20 convex parts or repeat units were within the measurement range. After setting the reference plane for the entire image, the measurement area was calculated as the entire area, and Sal was calculated. Sal was calculated with s = 0.2. Measurements were performed a total of five times at different measurement points, and the average of the five measurements was taken as the measurement value.

[0062] (Ease of holding evaluation method) A 15cm wide area in the center of the longitudinal direction of a 30cm x 50m film storage box was processed to adjust friction, and 20 monitors used the film storage box to cover a large plate or bowl with film, rating how easy it was to hold (non-slip, sticky) through the series of actions on the following five-point scale. A sensory evaluation of ease of holding was then conducted based on the average score. Rating: 5 points: Very comfortable to hold 4 points: Fairly comfortable to hold 3 points: Neither 2 points: Somewhat uncomfortable to hold 1 point: Very uncomfortable to hold evaluation: ◎: Average score of 4.4 or higher ○: Average 4.2 points or more and less than 4.4 points △: Average 4.0 points or more and less than 4.2 points ×: Average score below 4.0

[0063] (Film friction measurement method) The film friction was measured using a static and dynamic friction measuring instrument "TL201Tt" manufactured by Trinity Lab. The tactile contacts used were ones that were purchased within one year and were free of dirt and wear. A filter paper (Qualitative filter paper manufactured by Advantec, No. 2) cut to 30 mm x 70 mm was attached to a SUS plate with double-sided tape and used as the film fixing piece. The film piece to be measured was placed on the film fixing piece so as to cover the filter paper, and the film and SUS plate were fixed with double-sided tape, taking care not to wrinkle them. The film was attached so that the direction of withdrawal from the storage box (MD direction) and the longitudinal direction of the filter paper were aligned. The film fixing piece with the film attached was fixed to the table surface of the friction measuring instrument, and the tactile contact was moved 40 mm on the film surface on the filter paper with a load of 10 g at 10 mm / sec to measure the friction force between the film piece and the tactile contact, and the static friction coefficient was calculated. The measurements were performed in an atmosphere of 23°C and 50% RH. The measurement was carried out five times using different samples, and the average value of the five measurements was recorded as the measured value.

[0064] The above measurements and evaluations were carried out for the friction adjustment regions of the following Examples 1 to 6 and Comparative Examples 1 and 2. The results are summarized in FIG.

[0065] Example 1 T&K TOKA UV HJK underprint varnish G was used as the undercoat, and T&K TOKA GLA was used as the coating agent. T&K TOKA UV HJK underprint varnish G was then printed twice on Oji Materia Suncoat, and T&K TOKA GLA was printed on top of that at 35°C, followed by UV curing. The static friction coefficient with the tactile contact was 0.65, and the dynamic friction coefficient was 0.15. The ease of holding was evaluated as "◎". The sum of the values ​​of the core level difference Sk and the protruding peak height Spk according to ISO 25178 was 14 μm. The value of the minimum autocorrelation length Sal according to ISO 25178 was 83 μm.

[0066] Example 2 T&K TOKA UV HJK underprint varnish G was used as the base material, and T&K TOKA HTA-W was used as the coating material. T&K TOKA UV HJK underprint varnish G was then printed twice on Oji Materia Suncoat, and T&K TOKA HTA-W was printed on top of that at 35°C, followed by UV curing. The static friction coefficient with the tactile contact was 1.00, and the dynamic friction coefficient was 0.18. The ease of holding was evaluated as "◎". The sum of the values ​​of the core level difference Sk and the protruding peak height Spk according to ISO 25178 was 15 μm. The minimum autocorrelation length Sal according to ISO 25178 was 90 μm.

[0067] Example 3 T&K TOKA UV HJK underprint varnish G was used as the undercoat, and T&K TOKA GLA was used as the coating agent. T&K TOKA UV HJK underprint varnish G was printed on Oji Materia Suncoat in the grid pattern B1 shown in Figure 10, and T&K TOKA GLA was printed on top of it at 30°C, and then UV cured. The static friction coefficient with the tactile contact was 0.59, and the dynamic friction coefficient was 0.23. The ease of holding was evaluated as "good." The sum of the values ​​of the core level difference Sk and the protruding peak height Spk of ISO 25178 was 18 μm. The value of the minimum autocorrelation length Sal of ISO 25178 was 146 μm.

[0068] Example 4 The undercoat used was UV HJK underprint varnish G manufactured by T&K TOKA, and the coating agent was HTA-W manufactured by T&K TOKA. Then, T&K TOKA UV HJK underprint varnish G was printed on Oji Materia Suncoat in the grid pattern B1 shown in Figure 10, and T&K TOKA HTA-W was printed on top of it at 30°C, and then UV cured. The static friction coefficient with the tactile contact was 0.90, and the dynamic friction coefficient was 0.24. The ease of holding was evaluated as "good". The sum of the values ​​of the core level difference Sk and the protruding peak height Spk of ISO 25178 was 17 μm. The value of the minimum autocorrelation length Sal of ISO 25178 was 153 μm.

[0069] Example 5 T&K TOKA UV HJK underprint varnish G was used as the undercoat, and T&K TOKA GLA was used as the coating agent. T&K TOKA UV HJK underprint varnish G was printed twice on Oji Materia Suncoat, and T&K TOKA GLA was printed on top of it at 25°C in the dot pattern B2 of Figure 11, and then UV cured. The static friction coefficient with the tactile contact was 0.51, and the dynamic friction coefficient was 0.28. The ease of holding was evaluated as "△". The sum of the values ​​of the core level difference Sk and the protruding peak height Spk of ISO 25178 was 21 μm. The value of the minimum autocorrelation length Sal of ISO 25178 was 216 μm.

[0070] Example 6 T&K TOKA UV HJK underprint varnish G was used as the base coat, and T&K TOKA HTA-W was used as the coating agent. T&K TOKA UV HJK underprint varnish G was printed twice on Oji Materia Suncoat, and T&K TOKA HTA-W was printed on top of it in the dot pattern B2 in Figure 11 at 25°C, and then UV cured. The static friction coefficient with the tactile contact was 0.80, and the dynamic friction coefficient was 0.29. The ease of holding was evaluated as "△". The sum of the values ​​of the core level difference Sk and the protruding peak height Spk according to ISO 25178 was 22 μm. The value of the minimum autocorrelation length Sal according to ISO 25178 was 245 μm.

[0071] Comparative Example 1 No undercoat was used, and T&KTOKA HTA-W was used as the coating agent. Then, only T&KTOKA HTA-W was printed on Oji Materia Suncoat at 35°C, and then cured with UV light. The static friction coefficient with the tactile contact was 0.63, and the dynamic friction coefficient was 0.38. The ease of holding was rated as "x". The sum of the values ​​of the core level difference Sk and the protruding peak height Spk according to ISO 25178 was 5 μm. The minimum autocorrelation length Sal according to ISO 25178 was 340 μm.

[0072] Comparative Example 2 T&K TOKA UV HJK underprint varnish G was used as the base coat, and no coating agent was used. T&K TOKA UV HJK underprint varnish G was then printed on Oji Materia Suncoat, which was then UV cured. The static friction coefficient with the tactile contact was 0.39, and the dynamic friction coefficient was 0.23. The ease of holding was rated as "x". The sum of the values ​​of the core level difference Sk and the protruding peak height Spk according to ISO 25178 was 6 μm. The minimum autocorrelation length Sal according to ISO 25178 was 207 μm.

[0073] As shown in Figure 12, it was confirmed that the ease of holding the device improved when the friction adjustment area had a static friction coefficient of 0.50 or more and a dynamic friction coefficient of 0.30 or less with respect to the tactile contact. [Industrial Applicability]

[0074] INDUSTRIAL APPLICABILITY The present invention is useful in providing a film storage box that is not slippery, maintains its strength, and has a low sticky feel. [Explanation of symbols]

[0075] 1 Film holder 10 Film storage box 11 Winding body 20 Storage unit 21 Lid 30 Front Panel 31 Bottom plate 32 Rear plate 34 Side Panel 40 Lid plate 41 Cover piece F Film A Friction adjustment area

Claims

1. a storage section capable of storing a roll of film, the storage section having a front panel, a bottom panel, a rear panel, and side panels and an open top; A film storage box comprising: a cover plate capable of opening and closing an opening on a top surface of the storage section; and a cover portion having a cover piece extending from the cover plate toward a front panel of the storage section and covering at least a portion of the front panel when closed, A film storage box, the surface of at least one of the cover plate, the cover piece, the bottom plate, and the rear plate, has an area having a static friction coefficient of 0.50 or more and a dynamic friction coefficient of 0.30 or less with respect to a tactile contact.

2. 2. The film storage box according to claim 1, wherein the sum of the core level difference Sk and the protruding peak height Spk in the region, as defined by ISO 25178, is 13 μm or more.

3. 3. The film storage box according to claim 1, wherein the minimum autocorrelation length Sal in the region, as defined by ISO 25178, is 300 μm or less.

4. A film container, in which the roll is contained in the film container box according to any one of claims 1 to 3.

5. The film container according to claim 4 , wherein the static friction coefficient of the film with a tactile contact is 2.0 or more.

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