Wound body storage box

Abstract

An object of the present invention is to provide a roll storage box in which a wrap film is provided with an optimum rewinding prevention function.SOLUTION: A roll storage box capable of storing a wrap film roll in which a wrap film is wound in a roll shape, comprising a roll storage box body having a front plate and an upper opening, and a lid portion covering the upper opening so as to be openable and closable, wherein the front plate of the roll storage box body is provided with a region A, and the region A includes a portion in which an affinity parameter Δ Wa with the wrap film represented by the following formula (1) is 5 (mJ / m2) or less: SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a wound body storage box. [Background technology]

[0002] Wrap film is typically wound around a paper or resin core to form a cylindrical wrap film roll, which is then stored in a rectangular roll storage box. Conventionally, this type of wrap film roll storage box has a front panel coated with varnish, and employs a mechanism that prevents the wrap film pulled out from the wrap film roll from rewinding back into the wrap film roll after it has been cut by tightly adhering the wrap film to the front panel and locking it in place (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-034043 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with long, thin materials such as plastic wrap or foil, the drawer section may rewind into the long, thin material after cutting, making it difficult to use. For this reason, many products incorporate a mechanism that adheres tightly to the plastic wrap or foil into the roll storage box to prevent the drawer section from rewinding into the long, thin material. Generally, a good unwinding prevention function is achieved by improving the adhesion strength, but there are issues such as the need for a strong adhesion mechanism that adheres tightly to the plastic wrap or foil, and excessive adhesion.

[0005] The present invention has been made in view of the above circumstances. That is, an object of the present invention is to provide a roll storage box that is endowed with an optimal function for preventing unwinding of wrap film. [Means for solving the problem]

[0006] As a result of extensive research, the present inventors have found that the above-mentioned problems can be solved by using a specific configuration for a wrap film roll storage box capable of accommodating a wrap film roll, and have completed the present invention. That is, the present invention provides the following various specific embodiments.

[0007] [1] A wrap film storage box capable of storing a wrap film roll in which wrap film is wound into a roll, a rolled body storage box body having a front panel and an upper opening, and a lid portion that covers the upper opening in an openable and closable manner; An area A is provided on the front plate of the wound body storage box body, In the region A, the affinity parameter ΔW with the wrap film is expressed by the following formula (1): a is 5 (mJ / m 2 ) A roll storage box including the following parts:

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[0008] According to the present invention, it is possible to provide a roll storage box that is endowed with an optimal function for preventing unwinding of wrap film. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing the appearance of an example of a roll storage box for wrap film. [Figure 2] FIG. 1 is a development view of an example of a roll storage box for wrap film. [Figure 3] FIG. 1 is a perspective view showing an example of a roll storage box for wrap film in an opened state. [Figure 4] FIG. 1 is a perspective view showing an example of a roll storage box for wrap film when opening the box. [Figure 5] FIG. 2 is a front view of an example of a front plate showing where an area A is formed. [Figure 6] FIG. 1 is a perspective view showing an example of a roll storage box for wrap film provided with flaps and cutting lines. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments for carrying out the present invention (hereinafter abbreviated as "present embodiments") will be described in detail with reference to the drawings. The following embodiments are examples for explaining the present invention, and the present invention is not limited to these. In other words, the present invention can be implemented with any modifications within the scope of the gist thereof. Note that identical elements are given the same reference numerals, and redundant explanations will be omitted. Furthermore, positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings unless otherwise specified. Furthermore, the dimensional ratios of the drawings are not limited to those shown.

[0011] <Storage box for wound body> The roll storage box of this embodiment is a roll storage box capable of accommodating a wrap film roll in which wrap film is wound into a roll, and comprises a roll storage box main body having a front panel and an upper opening, and a lid that covers the upper opening in an openable and closable manner, and the front panel of the roll storage box main body is provided with an area A, and in the area A, an affinity parameter ΔW with the wrap film is expressed by the following formula (1): a is 5 (mJ / m 2 ) includes a part that is equal to or less than the above.

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[0012] In this embodiment, the affinity parameter ΔW a The method for controlling the amount of the fluorine-containing compound to be within the above range is not particularly limited, but for example, it can be adjusted by changing the material forming region A. In particular, when region A is formed of varnish, a method of appropriately adjusting the composition of the varnish to the composition described below can be mentioned. In this embodiment, the affinity parameter ΔW a can be measured by the method described in the Examples below.

[0013] In region A, the affinity parameter ΔW a is 5 (mJ / m 2 The range of the area where the area is 0.01 to 0.1% by area is preferably 20 to 100% by area, more preferably 50 to 100% by area, and even more preferably 80 to 100% by area.

[0014] In this embodiment, a flap may be present on the front panel, and region A may be on the flap.

[0015] In the wound body storage box of this embodiment, in the region A, the adhesiveness parameter Wα expressed by the following formula (2) is 60 (mJ / m 2 ) or more.

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[0016] In addition, in this embodiment, the method of controlling the adhesive parameter Wα within the above range is not particularly limited, but for example, it can be adjusted by changing the material that forms region A, and in particular, if region A is formed of varnish, a method of appropriately adjusting the composition of the varnish to the composition described below can be mentioned. In this embodiment, the adhesiveness parameter Wα can be measured by the method described in the Examples below.

[0017] In region A, the adhesive parameter Wα is 60 (mJ / m 2 The range of the area where the area ratio is 1 to 2 is preferably 20 to 100 area %, more preferably 50 to 100 area %, and even more preferably 80 to 100 area %.

[0018] In the roll storage box of this embodiment, the wrap film is preferably a polyvinylidene chloride (PVDC) film. If the wrap film in the roll storage box of this embodiment is a polyvinylidene chloride (PVDC) film, the wrap film can be given an even more optimal anti-rewinding function.

[0019] In the roll storage box of this embodiment, it is preferable that region A is formed with varnish, for example, a varnish coating layer as described below. In the roll storage box of this embodiment, if region A is formed with varnish, an even more optimal unwinding prevention function can be imparted to the wrap film. Furthermore, in the wound body storage box of this embodiment, the region A may be formed of, for example, glass, plastic, metal, or the like.

[0020] A specific example of the wound body storage box of this embodiment will be described below with reference to the drawings. Fig. 1 is a perspective view showing the appearance of a wrap film roll storage box 1, and Fig. 2 is a development view of the front side of the wrap film roll storage box 1 in Fig. 1. Fig. 3 is a perspective view showing the wrap film roll storage box 1 with the lid open.

[0021] 1 and 2, the wrap film roll storage box 1 has an overall rectangular parallelepiped shape and includes a lid portion 13 consisting of, for example, a cover piece 10, a cover plate 11, and side cover pieces 12, a top-opening wrap film storage box body 19 consisting of a front plate 14, a bottom plate 15, a rear plate 16, side plates 17, a fold-back piece 18, and a top opening 19a, and an opening piece 20. The fold-back piece 18 is folded back onto the back (inner) side of the front plate 14 and is not visible in the external appearance shown in FIG.

[0022] 3, the roll storage box main body 19 is formed in a rectangular parallelepiped shape with an upper opening 19a, and can store, through the upper opening 19a, a wrap film roll R, which is made by wrapping, for example, a transparent wrap film F around a cylindrical core. The wrap film F may have a tear strength of, for example, 6 cN or less.

[0023] 1, the cover plate 11 of the cover portion 13 extends forward from the upper edge of the rear plate 16 to cover the upper opening 19a of the roll-body storage box main body 19. The cover piece 10 extends from the front edge of the cover plate 11 toward the front plate 14 to cover the front surface of the front plate 14.

[0024] The base paper constituting the wrap film roll storage box 1 may be, for example, cardboard, coated cardboard, corrugated cardboard, etc., but is not limited to these, and any paper known in the industry can be appropriately selected and used. The base paper may be made of these materials and subjected to embossing, printing, lamination with polyethylene, etc.

[0025] The opening piece 20 is located at the lower front surface of the front plate 14 of the roll storage box main body 19, and is formed in a strip shape along the longitudinal direction of the roll storage box 1 for wrap film. The opening piece 20 is connected to the leading edge of the cover piece 10 via a perforation line 21. Before opening, the back side of the opening piece 20 is adhered to multiple adhesive portions 22 of the front plate 14 shown in FIG. 2, so that the upper opening 19a of the roll storage box main body 19 is covered by the lid part 13. Then, as shown in FIG. 4, by cutting the opening piece 20 along the perforation line 21, the lid part 13 becomes openable and closable relative to the upper opening 19a of the roll storage box main body 19, and the roll storage box main body 19 is opened.

[0026] As shown in Figures 3 and 4, a saw blade 30 is provided on the back side of the tip of the cover piece 10 as a cutting part for cutting the wrap film F pulled out from the wrap film roll R of the roll storage box main body 19. The saw blade 30 is formed over both longitudinal ends of the wrap film roll storage box 1 (cover piece 10). The saw blade 30 is formed in a position that protrudes downward from the tip edge of the cover piece 10 when the opening piece 20 is cut off. The material of the cutting part such as the saw blade 30 is not particularly limited as long as it is a conventionally known material such as metal, plastic, vulcanized fiber, etc., and the shape of the cutting part is also not particularly limited as long as it is a conventionally known material such as linear, V-shaped, arched, M-shaped, etc.

[0027] As shown in Figures 2 and 3, an area A40 (e.g., a varnish layer) is formed on the surface of the front panel 14 to temporarily fasten the wrap film F pulled out from the wrap film roll R. The wrap film F pulled out from the wrap film roll R is pressed against area A40 via the cover piece 10, thereby temporarily fastening it in area A40. Area A40 is formed from, for example, UV-cured varnish and has weak adhesive properties. Area A40 has an elongated shape that continues in the longitudinal direction of the wrap film roll storage box 1.

[0028] In one preferred embodiment, as shown in FIGS. 2 and 3, most of the region A40 is present in the upper part of the front panel 14, and the lower part of the region A40 is formed in a structure including a curve.

[0029] In a preferred embodiment, region A40 is formed in a central region that is narrower than the width D of the wrap film F. For example, as shown in Figure 5, both longitudinal side edges 40a of region A40 are at least 10 mm inward from the positions corresponding to both side edges F1 of the wrap film F, and the longitudinal length is at least 1 / 4 of the width D of the wrap film F. In a preferred embodiment, the distance L between the side edges 40a of region A40 and the side edges F1 of the wrap film F may be 10 mm or more, preferably 15 mm or more, and more preferably 18 mm or more.

[0030] In a preferred embodiment, region A40 is formed at a position 10 mm or more away from the cutting position (root of the blade) of saw blade 30 of cover piece 10 toward the top opening 19a of rolled body storage box main body 19 when cover plate 11 covers the top opening 19a of rolled body storage box main body 19. Therefore, the distance E between region A40 and the root of saw blade 30 may be 10 mm or more, preferably 14 mm or more, and more preferably 18 mm or more. Similarly, the vertical width H of region A40 may be 2 mm or more, preferably 20 mm or less, more preferably 10 mm or less, even more preferably 8 mm or less, and particularly preferably about 4 mm. Furthermore, width H may be varied within the above range in the longitudinal direction.

[0031] The wrap film F pressed through the cover piece 10 is stuck to area A40 located on the front panel 14. When using it again, the wrap film F is peeled off from area A40, the desired length is further pulled out from the wrap film roll R, and cut with the saw blade 30 while the cover part 13 is closed, thereby obtaining the desired length of wrap film F.

[0032] According to this embodiment, region A40 continues along the longitudinal direction of the front panel 14 and has an elongated shape narrower than the width D of the wrap film F, and region A40 is not formed in the part corresponding to the side edge F1 of the wrap film F. Therefore, even if the side edge F1 of the wrap is scratched during transportation, the adhesive strength of region A40 prevents the wrap film F from tearing from the side edge F1, starting from the scratch, when new wrap film F is next pulled out. Region A40's ability to prevent the wrap film F from rewinding can also be maintained.

[0033] In particular, when region A40 has both longitudinal ends 40a at least 10 mm inward from the positions corresponding to both longitudinal ends F1 of the wrap film F and has a longitudinal length of at least 1 / 4 of the width D of the wrap film F, tearing from the side ends F1 of the wrap film F can be more reliably prevented.

[0034] Furthermore, when the cover plate 11 covers the top opening 19a of the roll-material storage box main body 19, the region A40 is formed at a position at least 10 mm away from the position of the saw blade 30 of the cover piece 10 toward the top opening 19 of the roll-material storage box main body 19. This prevents the leading edge of the wrap film F from being temporarily fastened by the region A40 after cutting. Therefore, even if the leading edge of the wrap film F is scratched by the saw blade 30 when pulling out new wrap film F, the adhesive strength of the region A40 prevents the wrap film F from tearing from the scratch. In addition, a gripping margin that is not temporarily fastened to the region A40 is created at the leading edge of the wrap film F, improving the ease of gripping the wrap film F. Furthermore, by making the distance from the top edge of the front panel 14 (the folded portion 14a shown in FIG. 2) to the edge of the region A40 on the top opening side at least 1 mm, the wrap film F can be prevented from coming into contact with the region A40 and becoming difficult to pull out, maintaining better pull-out properties.

[0035] The vertical width H of area A40 is 2 mm or more and 20 mm or less, so the width H of area A40 is appropriate. In other words, because the width H of area A40 is 2 mm or more, the wrap film F can be sufficiently temporarily fastened after cutting, preventing rewinding of the wrap film F. Furthermore, because the width H of area A40 is 20 mm or less, the operation of peeling the wrap film F from area A40 can be completed in a short time, improving the workability of removing the wrap film F.

[0036] In particular, when the tear strength of the wrap film F is 6 cN or less, the wrap film F tends to tear easily, so there is a great benefit in preventing tearing of the wrap film F by setting the formation area of ​​area A40 to a specified position or range, as in one preferred embodiment of this embodiment.

[0037] Furthermore, in the above embodiment, a flap 50 that rises forward may be provided on the front plate 14 as shown in Figure 6. The flap 50 is formed, for example, by cutting a cutting line 51 into the front plate 14, and can be installed in a state where it rises forward of the front plate 14 by utilizing the stress that occurs when the folding plate 18 is bent toward the back surface of the front plate 14. By using such a mechanism in combination with area A40 in this embodiment, the wrap film F can be made easier to grip. The roll storage box of this embodiment preferably further comprises a flap formed by a score line, and region A (e.g., the varnish layer) is provided on at least the front surface of the flap. With this configuration, the roll storage box of this embodiment tends to be more susceptible to contact between the wrap film and region A (e.g., the varnish layer), making it even more difficult for the wrap film to unwind.

[0038] While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that those skilled in the art can conceive of various modifications and alterations within the scope of the ideas described in the claims, and it is understood that these modifications and alterations also fall within the technical scope of the present invention.

[0039] In the wound body storage box of this embodiment, it is preferable that the region A is a varnished layer. The varnish composition constituting the varnish coating layer is preferably an ultraviolet-curable resin composition that is cured by ultraviolet irradiation. The ultraviolet-curable resin composition has an affinity parameter ΔW a As long as the above-mentioned specific range can be controlled, there is no particular limitation, but an acrylic resin or an acrylate compound is preferably used. Among them, an ultraviolet-curable resin composition containing the following components is more preferred. Acrylic resins, acrylate compounds Photopolymerization initiator Other ingredients In this embodiment, the varnish refers to a curable resin composition that is cured by ultraviolet light, heat, or the like.

[0040] Acrylic resins, acrylate compounds The acrylic resin and acrylate compound are not particularly limited, and known compounds can be used. The acrylic resin and acrylate compound may contain a functional group such as an amino group or a phenyl group, or may be a vegetable oil-modified compound. The acrylic resin and acrylate compound are used not only as a resin having a main skeleton but also as a plasticizer.

[0041] Specific examples of acrylic resins and acrylate compounds containing functional groups include commercially available products such as Beamset 271 (solid content 50% (diluted acrylate compound)), Beamset 267F (solid content 40% (diluted acrylate compound)), and Beamset 255 (solid content 50% (diluted acrylate compound)) manufactured by Arakawa Chemical Industries, Ltd., but are not particularly limited to these. These may be used alone or in appropriate combination of two or more types.

[0042] Examples of vegetable oil-modified acrylic resins and acrylate compounds include epoxidized vegetable oil-modified acrylates, and specific examples include PHOTOMER3005 (manufactured by IGM Resins BV), EB860, EB5848 (manufactured by Daicel-Allnex Co., Ltd.), MIRAMER PE3130 (manufactured by MIWON), LAROMER EA9101 (manufactured by BASF), and CN111 (manufactured by SARTOMER), but are not limited to these. These may be used alone or in appropriate combination of two or more.

[0043] Specific examples of other acrylic resins and acrylate compounds include 2-hydroxy-3-methacrylpropyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, β-carboxylethyl (meth)acrylate, 4-tert-butylcyclohexanol (meth)acrylate, tetrahydrofurfuryl acrylate, alkoxylated tetrahydrofurfuryl acrylate, caprolactone (meth)acrylate, lauryl (meth)acrylate, stearyl (meth)acrylate, isoamyl (meth)acrylate, 2-phenoxyethyl (meth)acrylate, isodesyl (meth)acrylate, and methyl acrylate. monofunctional (meth)acrylate compounds such as methyl (meth)acrylate, 3,3,5-trimethylcyclohexanol (meth)acrylate, cyclohexyl (meth)acrylate, isobornyl (meth)acrylate, norbornyl (meth)acrylate, dicyclopentanyl (meth)acrylate, dicyclopentenyl (oxyethyl) (meth)acrylate, 1,4-cyclohexanedimethanol (meth)acrylate, cyclic trimethylolpropane formal (meth)acrylate, benzyl (meth)acrylate, EO-modified (2) nonylphenol acrylate, (2-methyl-2-ethyl-1,3-dioxolan-4-yl)methyl acrylate, and acryloylmorpholine; 1,3-Butylene glycol di(meth)acrylate, 1,4-butanediol di(meth)acrylate, 3-methyl-1,5-pentanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, 1,9-nonanediol di(meth)acrylate, 1,10-decanediol di(meth)acrylate, 1,2-dodecanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, polyethylene glycol (200) di(meth)acrylate, polyethylene glycol (300) di(meth)acrylate, polyethylene glycol (400) di(meth)acrylate, polyethylene glycol (600) di(meth)acrylate, hydroxypivalic acid neopentyl glycol di(meth)acrylate, dipropylene glycol bifunctional (meth)acrylate compounds such as ethylene glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate, EO-modified (2) 1,6-hexanediol di(meth)acrylate, PO-modified (2) neopentyl glycol di(meth)acrylate, (neopentyl glycol-modified) trimethylolpropane di(meth)acrylate, dimethyloltricyclodecane di(meth)acrylate, EO-modified (4) bisphenol A di(meth)acrylate, PO-modified (4) bisphenol A di(meth)acrylate, cyclohexanedimethanol di(meth)acrylate, dimethyloltricyclodecane di(meth)acrylate, dicyclopentanyl di(meth)acrylate, and tris(2-hydroxyethyl)isocyanurate di(meth)acrylate; trifunctional (meth)acrylate compounds such as glycerin propoxylate tri(meth)acrylate, trimethylolpropane tri(meth)acrylate, EO-modified (3) trimethylolpropane tri(meth)acrylate, PO-modified (3) trimethylolpropane tri(meth)acrylate, ε-caprolactone-modified tris-(2-acryloxyethyl) isocyanurate, ethoxylated isocyanuric acid tri(meth)acrylate, tris(2-hydroxyethyl) isocyanurate tri(meth)acrylate, and pentaerythritol tri(meth)acrylate; tetrafunctional (meth)acrylate compounds such as pentaerythritol tetra(meth)acrylate and ditrimethylolpropane tetra(meth)acrylate; Pentafunctional (meth)acrylate compounds such as dipentaerythritol penta(meth)acrylate; hexafunctional (meth)acrylate compounds such as dipentaerythritol hexa(meth)acrylate; Examples include, but are not limited to, these. These may be used alone or in appropriate combination of two or more. The number of functional groups preferably includes two or more functional groups. Note that "PO" stands for "propylene oxide," "EO" stands for "ethylene oxide," and "n-functional (meth)acrylate compound" means a (meth)acrylate compound having n (meth)acryloyl groups.

[0044] Furthermore, urethane acrylate, polyester acrylate, epoxy acrylate, etc. can also be used as the acrylic resin or acrylate compound.

[0045] Urethane acrylates include, for example, those obtained by reacting a diisocyanate with a (meth)acrylate having a hydroxyl group, and those obtained by reacting an isocyanate group-containing urethane prepolymer obtained by reacting a polyol with a polyisocyanate under conditions of an excess of isocyanate groups with a (meth)acrylate having a hydroxyl group. Alternatively, they can also be obtained by reacting a hydroxyl group-containing urethane prepolymer obtained by reacting a polyol with a polyisocyanate under conditions of an excess of hydroxyl groups with a (meth)acrylate having an isocyanate group.

[0046] The polyester acrylate can be obtained, for example, by reacting a polyester polycarboxylic acid obtained by polycondensing a polybasic acid and a polyhydric alcohol with a hydroxyl group-containing (meth)acrylate or the like.

[0047] Examples of epoxy acrylates include those obtained by esterifying the glycidyl group of an epoxy resin with (meth)acrylic acid to form a (meth)acrylate group as a functional group. Specific examples include (meth)acrylic acid adducts of bisphenol A epoxy resins and (meth)acrylic acid adducts of novolac epoxy resins.

[0048] The above acrylic resins and acrylate compounds may be used alone or in appropriate combination of two or more.

[0049] The content ratio of the above acrylic resin and acrylate compound can be appropriately set depending on the desired performance and is not particularly limited, but is preferably 45 to 85 mass % in total, more preferably 50 to 80 mass %, based on the total mass of the varnish.

[0050] Photopolymerization initiator The photopolymerization initiator is not particularly limited, and known ones can be used.

[0051] Specific examples of photopolymerization initiators include hydrogen abstraction photopolymerization initiators such as benzophenone, p-methylbenzophenone, p-chlorobenzophenone, tetrachlorobenzophenone, methyl benzoylbenzoate, 4-phenylbenzophenone, hydroxybenzophenone, 4-benzoyl-4'-methyl-diphenyl sulfide, 2-isopropylthioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, 2,4-dichlorothioxanthone, acetophenone-aryl ketone initiators, 4,4'-bis(diethylamino)benzophenone, 4,4'-bis(dimethylamino)benzophenone, p-dimethylaminobenzoic acid isoamyl, p-dimethylaminoacetophenone-dialkylaminoaryl ketone initiators, thioxanthone, xanthone-based, halogen-substituted, and polycyclic carbonyl initiators. In addition, examples of cleavage-type photopolymerization initiators include benzoin, benzoin methyl ether, benzoin isopropyl ether, α-acrylbenzoyl-benzoin systems, benzil, 2-methyl-2-morpholino(4-thiomethylphenyl)propan-1-one, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-1-butanone, benzil methyl ketal, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-(4-isopropylphenyl-2-hydroxy-2-methylpropan-1-one, Examples of the photopolymerization initiator include, but are not limited to, 4-(2-hydroxyethoxy)phenyl-(2-hydroxy-2-propyl)ketone, 4-(2-acryloyloxyethoxy)phenyl-2-hydroxy-2-propyl ketone, diethoxyacetophenone, diphenylacylphenylphosphine oxide, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, etc. One type of photopolymerization initiator may be used alone, or two or more types may be used in appropriate combination.

[0052] The content of the photopolymerization initiator can be appropriately set depending on the desired performance and is not particularly limited, but is preferably 5 to 15% by mass in total relative to the total mass of the varnish.

[0053] The varnish may contain a photopolymerization initiation aid to improve curability. Specific examples of the photopolymerization initiation aid include, but are not limited to, triethanolamine, methyldiethanolamine, triisopropanolamine, aliphatic amines, 4,4'-diethylaminobenzophenone, ethyl 2-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate, and dibutylethanolamine. These may be used alone or in appropriate combinations of two or more.

[0054] The content ratio of the photopolymerization initiation aid relative to the total mass of the varnish can be set appropriately depending on the desired performance and is not particularly limited, but a total of 0.1 to 8 mass% relative to the total mass of the varnish is preferred, and 0.5 to 5 mass% is more preferred.

[0055] Other ingredients The above-mentioned varnish may contain, in addition to the above-mentioned components, various known additives, such as plasticizers, leveling agents, antibacterial agents, antistatic agents, surfactants, antifoaming agents, polymerization inhibitors, antioxidants, UV absorbers, waxes, slip agents, etc., as necessary, within the range that does not reduce the effects of the present invention.

[0056] ·UV curing method The method for curing the ultraviolet-curable resin composition by ultraviolet irradiation is not particularly limited, and known methods can be applied. For example, the ultraviolet-curable resin composition can be cured by applying energy from various light sources such as low-pressure mercury lamps, medium-pressure mercury lamps, high-pressure mercury lamps, ultra-high-pressure mercury lamps, xenon lamps, carbon arc lamps, metal halide lamps, fluorescent lamps, tungsten lamps, argon ion lasers, helium-cadmium lasers, helium-neon lasers, krypton ion lasers, various semiconductor lasers, YAG lasers, light-emitting diodes, CRT light sources, plasma light sources, electron beams, gamma rays, ArF excimer lasers, KrF excimer lasers, and F2 lasers. The film thickness when applying the ultraviolet-curable resin composition (film thickness after curing) can be set appropriately depending on the desired performance and is not particularly limited, but is generally 0.1 to 100 μm, preferably 0.5 to 80 μm, more preferably 1 to 60 μm, even more preferably 2 to 50 μm, more preferably 3 to 40 μm, particularly preferably 4 to 30 μm, especially preferably 5 to 20 μm, and most preferably 6 to 10 μm. Within these film thickness ranges, there is no curing inhibition, the ultraviolet irradiation time can be shortened, productivity is good, and it is cost-effective. When paper is used for the storage box for the roll of wrap film, the unevenness of the paper surface can be absorbed to create a smooth varnish surface, which improves adhesion to the wrap film.

[0057] ·How to apply varnish As a method for applying the varnish, known means such as a roll coater, gravure coater, flexo coater, offset printing machine, screen printing machine, etc. can be appropriately used, but the method is not limited to these.

[0058] ·Wrapping film Examples of wrap films used in this embodiment include, but are not limited to, polyvinylidene chloride film, polyvinyl chloride film, polyethylene film, polypropylene film, polymethylpentene film, polyester film, and ethylene-vinyl acetate copolymer film. From the viewpoint of the abrasion resistance of region A (e.g., the varnish coating layer) and the adhesive strength to the wrap film, the effects of the present invention tend to be particularly pronounced when applied to polyvinylidene chloride film. When polyvinylidene chloride film is used, it is preferable that the vinylidene chloride content be, for example, 72 mol% to 93 mol%, although there are no particular limitations.

[0059] Furthermore, the wrap film may contain various additives as needed, although there are no particular limitations on these additives. Examples of the additives include, but are not limited to, known stabilizers such as epoxidized vegetable oils, and known plasticizers such as citrate esters, dibasic acid esters, and cetyl fatty acid glycerides. Examples of epoxidized vegetable oils include, but are not limited to, those generally produced by epoxidizing edible fats and oils. Specific examples include epoxidized soybean oil (ESO) and epoxidized linseed oil. Examples of citric acid esters include, but are not limited to, triethyl citrate, tributyl citrate, triethyl acetyl citrate, tributyl acetyl citrate (ATBC), tri-n-(2-ethylhexyl) acetyl citrate, and the like. The dibasic acid ester is not particularly limited, but examples thereof include adipate esters such as dibutyl adipate, di-n-hexyl adipate, di-2-ethylhexyl adipate, and dioctyl adipate; azelaic acid esters such as di-2-ethylhexyl azelaate and octyl azelaate; and sebacate esters such as dibutyl sebacate (DBS) and di-2-ethylhexyl sebacate. The acetylated fatty acid glyceride is not particularly limited, but examples thereof include glycerin diacetyl monolaurate.

[0060] The wrap film may contain compounds other than the epoxidized vegetable oil, citric acid ester, dibasic acid ester, and acetylated fatty acid glyceride (hereinafter referred to as "other compounds"), such as plasticizers, stabilizers, weather resistance improvers, colorants such as dyes or pigments, anti-fogging agents, antibacterial agents, lubricants, nucleating agents, oligomers such as polyesters, and polymers such as MBS (methyl methacrylate-butadiene-styrene copolymer).

[0061] The plasticizer is not particularly limited, but specific examples include dimethyl phthalate, diethyl phthalate, dioctyl phthalate, glycerin, glycerin esters, wax, liquid paraffin, and phosphate esters.

[0062] The stabilizer is not particularly limited, but specific examples include antioxidants such as 2,5-t-butylhydroquinone, 2,6-di-t-butyl-p-cresol, 4,4'-thiobis-(6-t-butylphenol), 2,2'-methylene-bis-(4-methyl-6-t-butylphenol), octadecyl-3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate, and 4,4'-thiobis-(6-t-butylphenol); and heat stabilizers such as laurate, myristate, palmitate, stearate, isostearate, oleate, ricinoleate, 2-ethylhexylate, isodecanoate, neodecanoate, and calcium benzoate.

[0063] The weather resistance improver is not particularly limited, but specific examples include ultraviolet absorbers such as ethylene-2-cyano-3,3'-diphenylacrylate, 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 2-(2'-hydroxy-3'-t-butyl-5'-methylphenyl)5-chlorobenzotriazole, 2-hydroxy-4-methoxybenzophenone, and 2,2'-dihydroxy-4-methoxybenzophenone.

[0064] The colorant such as a dye or pigment is not particularly limited, but specific examples include carbon black, phthalocyanine, quinacridone, indoline, azo pigments, and red iron oxide.

[0065] The anti-fogging agent is not particularly limited, but specific examples thereof include glycerin fatty acid esters, sorbitan fatty acid esters, polyoxyethylene fatty acid alcohol ethers, polyoxyethylene glycerin fatty acid esters, and polyoxyethylene sorbitan fatty acid esters.

[0066] The antibacterial agent is not particularly limited, but specific examples include silver-based inorganic antibacterial agents.

[0067] The lubricant is not particularly limited, but specific examples include fatty acid hydrocarbon lubricants such as ethylene bisteramide, butyl stearate, polyethylene wax, paraffin wax, carnauba wax, myristyl myristate, and stearyl stearate, higher fatty acid lubricants, fatty acid amide lubricants, and fatty acid ester lubricants.

[0068] The nucleating agent is not particularly limited, but specific examples include metal salts of phosphate esters.

[0069] The content of the other ingredients is not particularly limited, but is preferably 5% by mass or less, more preferably 3% by mass or less, even more preferably 1% by mass or less, and particularly preferably 0.1% by mass or less, of the wrap film.

[0070] <Packaging of wrap film rolls> The wrap film roll package of this embodiment includes the above-described roll storage box and a wrap film roll housed within the roll storage box main body of the roll storage box. By including the above-described roll storage box, the wrap film roll package of this embodiment can provide the wrap film with an optimal anti-rewind function. [Example]

[0071] The features of the present invention will be explained in more detail below with reference to examples and comparative examples, but the present invention is not limited thereto. That is, the materials, amounts used, ratios, processing details, processing procedures, etc. shown in the following examples can be appropriately changed without departing from the spirit of the present invention. Furthermore, the values ​​of various production conditions and evaluation results in the following examples represent preferred upper or lower limits in the embodiments of the present invention, and preferred ranges may be defined by combining the above-mentioned upper or lower limits with the values ​​in the following examples or values ​​between the examples.

[0072] The measurement and evaluation methods used in the examples and comparative examples are as follows. 1. Region A Sample Preparation Basis weight 550g / m 2 Using coated cardboard (paperboard) as the material, region A was created on a wrap film storage mount approximately 310 mm wide in the longitudinal direction, as shown in Figure 2. The wrap film storage mount was then sharpened with a blade and assembled to create a wrap film roll storage box with region A.

[0073] 2. Evaluation Method (a) Affinity parameter ΔWa and adhesive parameter Wα A wrap film (Saran Wrap, manufactured by Asahi Kasei Home Products) conditioned for 4 weeks at 23±2°C and 50±10% RH and a roll storage box were used. Using a Kyowa Interface Science Co., Ltd. DMo-902 dynamic contact angle meter, 2 μm purified water (TRUSCO Corporation, part number W-20) and 2 μm diiodomethane (Tokyo Chemical Industry Co., Ltd., purity 98.0% or higher) were dropped onto the wrap film and area A, respectively. After 2 seconds, the contact angles were measured using the θ / 2 method automatically with analytical software (FAMAS). The arithmetic mean of the contact angles was recorded as the measured value. Measurements were performed in a constant-temperature room at 23±2°C and 50±10% RH. The droplets were created using manufacturer-supplied heat-resistant glass syringes and stainless steel needles. The location of area A should be selected so that the droplets formed completely on area A. For example, if area A has a dot pattern or the like, and 2 μm droplets are not formed completely on area A, the amount of droplets dropped can be reduced to reduce the size of the droplets formed. Also, the side of the wrap film that comes into contact with area A is selected. Then, from the contact angle measurement results for water and diiodomethane, the dispersion component γ of each surface free energy is calculated. d and dipole component (orientation) γ p The affinity parameter ΔWa and adhesive parameter Wα were calculated from the obtained surface free energies using the following formulas (1) and (2).

number

number

[0074] (b) Rewind evaluation A wrap film (manufactured by Asahi Kasei Home Products, product name: Saran Wrap) was stored in a wrap film roll storage box and conditioned for 4 weeks at 40±2°C and 10±10% RH. Then, a measurement sample was conditioned for 2 hours in a thermostatic chamber at 23±2°C and 50±10% RH. Under the same conditions, the wrap film was unwrapped approximately 40 cm and cut with a saw blade while holding the top surface with a thumb (without holding the front panel). The adhesion between the wrap film and region A immediately after opening the lid was confirmed and evaluated according to the following criteria. This procedure was repeated 20 times, and the number of "x" marks was divided by the number of trials (20) to calculate the rewinding rate (%). The rewinding evaluation was performed on n = 30 samples, and the arithmetic mean value was used as the measurement value. [Evaluation criteria] ○: The film and area A are in close contact ×: The film and region A are not in close contact

[0075] (Examples 1 to 3, Comparative Examples 1 and 2) A roll storage box capable of containing a wrap film roll in which wrap film has been wound into a roll was produced, comprising a roll storage box main body having a front panel and an upper opening, and a lid that can open and close the upper opening, with a varnish coating layer provided as region A on the front panel of the roll storage box main body using the method described above, as shown in Figures 2 and 3. Table 1 shows the composition of the varnish coating layer for each production example (the values ​​in the table are in parts by mass). The formulation of the varnish coating layer (UV cured varnish) was applied to area A, and then the varnish coating layer was produced by curing the varnish with two 150 W / cm UV lamps. In Example 3, a primer (UV Peel-Off OP Varnish UP-2 manufactured by T&K TOKA) was applied to form a base layer. A UV cured varnish was applied on top of the base layer, and the same procedure was repeated. In Comparative Example 2, UV CORE TYPE-H manufactured by T&K TOKA was used as the UV cured varnish.

[0076] [Table 1]

[0077] (Examples 4 to 5, Comparative Example 3) Instead of a varnish coating layer in region A, a polystyrene sheet (OPS film, manufactured by Asahi Kasei Corporation), aluminum foil (Sunfoil, manufactured by Toyo Aluminum Co., Ltd.), and a Teflon sheet (PTFE sheet, manufactured by Sanplatec Co., Ltd.) were prepared in the shape of region A, as shown in Table 2, and attached to the designated position on the wrap film storage base.Then, sharpening and assembly were carried out in the same manner as in Example 1, to produce a roll storage box for wrap film having region A.

[0078] Table 2 shows the affinity parameter ΔWa, adhesive parameter Wα, and the results of the refolding evaluation.

[0079] [Table 2] [Industrial Applicability]

[0080] INDUSTRIAL APPLICABILITY The present invention is useful in a wrap film roll storage box because it can impart an optimal anti-rewinding function to the wrap film. [Explanation of symbols]

[0081] 1. Storage box for rolls of wrap film 10 Cover piece 11 Lid plate 12 Side cover piece 13 Lid 14 Front panel 14a Front panel fold 15 Bottom plate 16 Rear plate 17 Side Panel 18 Folding piece 19. Rolled body storage box body 19a Upper opening 20 opening piece 21 Cutting Lines 22 Adhesive part 30 saw blade 40 Area A 40a side edge 50 Flap 51 Cutting line R Wrap film roll F. Wrapping film

Claims

1. A wrap film storage box capable of storing a wrap film roll in which wrap film is wound into a roll, a rolled body storage box body having a front panel and an upper opening, and a lid portion that covers the upper opening in an openable and closable manner; An area A is provided on the front panel of the wound body storage box body, In the region A, the affinity parameter ΔW with the wrap film is expressed by the following formula (1): a is 5 (mJ / m 2 ) A roll storage box including the following parts: [Equation 1] (In formula (1), γ d F is the surface free energy dispersion component of the wrap film, and γ d A is the surface free energy dispersion component of region A, and γ p F is the surface free energy dipole component (orientation) of the wrap film, and γ p A is the surface free energy dipole component (orientation) of region A.

2. In the region A, the adhesiveness parameter Wα expressed by the following formula (2) is 60 (mJ / m 2 2. The wound body storage box according to claim 1, comprising a portion in which the length is equal to or greater than 100 mm. [Equation 2] (In formula (2), γ d F is the surface free energy dispersion component of the wrap film, and γ d A is the surface free energy dispersion component of region A, and γ p F is the surface free energy dipole component (orientation) of the wrap film, and γ p A is the surface free energy dipole component (orientation) of region A.

3. 3. The roll storage box according to claim 1, wherein the wrap film is a polyvinylidene chloride (PVDC) film.

4. 3. The wound body storage box according to claim 1, wherein the region A is formed of varnish.

5. 3. The wound body storage box according to claim 1, wherein a majority of the region A is present in an upper portion of the front plate, and a lower portion of the region A is formed in a structure including a curve.

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