JP2608617B2 - Carton for wrap film - Google Patents

Description

The present invention relates to a wrap film carton used by cutting a wrap film wound around a paper tube or the like.

[Conventional technology]

What is generally called a wrap film is a polyvinylidene chloride-based synthetic resin film (for example, Saran wrap manufactured by Asahi Kasei Corporation). A long film wound around a paper tube is housed in a paper carton with a cutting blade. I have. This wrap film is used while stored in a carton, and the end is always protruded out of the carton, and whenever necessary, the end is picked, pulled out, and the wound wrap film in the carton is removed. After rotation, the desired length is drawn out, and the part drawn out by the cutting blade is cut and used.

However, if the pulled out end after cutting is rewound into the carton and adheres to the surface of the stored rolled film, since the film itself is transparent, it has adhesiveness, When using it, it was difficult to find the end and pull it out. In order to prevent this unwinding, a wrap film carton provided with a sticky adhesive layer on the side wall of the carton or an unwinding preventing portion made of an adhesive tape has been developed. (See, for example, Japanese Utility Model Publication Nos. 55-53459 and 61-22823) [Problems to be Solved by the Invention] As described above, the unwinding prevention layer provided on the side wall of the conventional carton is made of an adhesive adhesive layer or an adhesive tape. Therefore, it exhibits adhesive strength to paper, metal, dust, etc. other than wrap film.When carton blanks are stacked when producing carton, an adhesive adhesive layer or adhesive tape Therefore, there is a problem that a blocking phenomenon occurs in which the unwinding-prevention layer and the stacked carton blanks are stuck to each other, so that the layer cannot be applied to a sack sticking machine for producing a carton.

In addition, as described above, the conventional anti-rewind layer also exerts an adhesive force on paper, metal, dust, etc. other than the wrap film. Avoids the problem that the inner side of the carton lid adheres, making it difficult to open the lid, and the paper on the back side of the lid sticking to the rewind prevention layer when opened. In this case, the sticking prevention film must be provided on the inner surface side of the lid, and there is a problem that the production of the carton requires labor, time and cost.

Furthermore, a conventional anti-rewind layer made of a tacky adhesive layer or an adhesive tape cannot be provided at the same speed as the printing of the carton at the time of production, and in-line.
For this reason, a rewind preventing layer must be provided in a separate step after printing, which increases the number of working steps, lowers the efficiency, and increases the price.

Therefore, an object of the present invention is to provide a carton for a wrap film provided with an anti-rewind layer for preventing the rewind of the wrap film, except for the wrap film, by providing an anti-rewind layer that does not exhibit adhesiveness. In carton making for wrap film, carton blanks can be stacked and carton can be made with a sack sticking machine, and there is no need to provide an anti-sticking film on the inner surface side of the carton lid. In the same step as the printing step of performing the exterior printing of the carton to be performed, and, furthermore, by providing a carton for a wrap film capable of providing an anti-rewind layer, in an offset method or a gravure method, which is a normal printing method. Another object of the present invention is to provide an inexpensive wrap film carton with improved efficiency of the working process.

[Means for solving the problem]

The present invention provides a wrap film carton having a cutting blade for accommodating a wound wrap film and having a rewind prevention layer provided on a side wall at a position where the wrap fill is cut, wherein the anti-rewind layer is made of an ultraviolet curable acrylic. A wrap film carton, characterized in that it is a gloss coat layer of a base resin, and the unwinding prevention layer is provided directly on the side wall or via an anchor coat layer.

As the ultraviolet curable acrylic resin used for the unwinding prevention layer, an acrylic resin having a polyfunctional and small molecular weight is particularly preferable.

[Action]

By making the unwind prevention layer a gloss coat layer made of an ultraviolet curable acrylic resin, the acrylic resin is cured by ultraviolet light, so that the unwind prevention layer itself has adhesiveness,
Although it has low adhesiveness and does not exhibit adhesiveness to paper, metal, etc., it has a good adhesion to a wrap film, and thus functions as a rewind prevention layer.

When a polyfunctional acrylic resin having a small molecular weight among the acrylic resins is used, the resin becomes a soft gloss coat layer and the adhesion strength of the wrap film is further improved.

Therefore, the anti-rewind layer composed of the gloss coat layer of the ultraviolet-curable acrylic resin of the present invention does not exhibit adhesiveness to paper, metal, etc. Blocking does not occur, and a sack sticking machine for box making can be used as it is.

Further, the lid can be opened smoothly without providing a film or the like for preventing sticking on the inner surface side of the lid of the carton, and the dust or paper peeling does not stick to the rewind prevention layer.

Furthermore, by using an ultraviolet curable acrylic resin for the anti-rewind layer, the anti-rewind layer can be provided simultaneously with printing on the carton.

〔Example〕

FIG. 1 is a perspective view showing an example of a wrap film carton of the present invention.
And a lid 3 connected to the storage section 2, a cutting blade 4 is provided at an end of the lid 3, and a side wall 5 of the storage section 2 where the wrap film 1 is cut.
This is a wrap film carton provided with a rewind prevention layer 6.

The unwinding prevention layer 6 is formed of a gloss coat layer of an ultraviolet curable resin, and this gloss coat layer may be provided directly on the side wall, or may be provided via an anchor coat layer.

Hereinafter, various materials shown in Table 1 were applied as the unwinding-preventing layer as shown in the sample shown in FIG. 2, and an adhesion test with a polyvinylidene chloride-based film and a polyvinyl chloride-based film was performed. (Measured by JIS P8147) The paper used in the test was a paper which had been printed as shown in Table 2 and cured by UV.

In Table 1, (O) is the offset method, and (G) is
Indicates that the printing layer was provided on the substrate by the gravure method.

PVC stands for polyvinyl chloride, and PVDC stands for polyvinylidene chloride.

* 1 indicates Unicure # 16 manufactured by Godo Ink Co., Ltd. with anchor coat of UV Sealer of Godo Ink Co., Ltd.

* 2 indicates a resin containing an acrylic polyfunctional monomer or oligomer as a main component, and represents Daicure Coat # 950 manufactured by Dainippon Ink and Chemicals, Inc.

Next, a resin having a different content of monomers and oligomers in the UV-curable polyacrylic resin used for E and F in Table 1 was printed and cured by UV, and a PVC film and a PVDC film were used. The adhesion was measured. The results are shown in the graph of FIG.

As described above, a UV-curable polyacrylic resin having excellent adhesion, particularly a polyfunctional resin having a small molecular weight is preferable.
(Those having a high content of monomers and oligomers in the UV-curable polyacrylic resin) [Effect of the Invention] The present invention provides a wrap film because the unwinding-prevention layer is a gloss coat layer of an ultraviolet-curable acrylic resin. For other types, it is possible to provide a rewind prevention layer that does not exhibit adhesiveness, and in box making of wrap film carton, blocking does not occur even if carton blanks are piled up, so the sack sticking machine for box making is intact Can be used. Further, when the lid of the carton is not opened, the lid and the rewind preventing layer do not stick to each other, and can be opened smoothly and neatly without providing an adhesion preventing film on the inner surface side of the lid.

In addition, the anti-rewind layer made of a gloss coat layer of an ultraviolet curable acrylic resin can be formed directly on the outer printing of the carton, so that there is no need for any trouble, and also, the outer printing of the general carton base material can be performed. Since it can be provided at the same speed, there is an advantage that the rewind preventing layer can be formed by the same material and the same line as the printing of the carton base material.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of the carton of the present invention, and FIG.
The figure is an explanatory view of the sample used for the test of the adhesion of the film, and FIG. 3 is a graph showing the relationship between the contents of the monomers and oligomers of the ultraviolet-curable polyacrylic resin and the adhesion. DESCRIPTION OF SYMBOLS 1 ... Wrap film 2 ... Storage part 3 ... Lid 4 ... Cutting blade 5 ... Side wall 6 ... Rewind prevention layer

 ──────────────────────────────────────────────────続 き Continued on the front page Judge of the Joint Panel Judge Shigeru Kumagai Judge Tadahiko Soyama Judge Judge Fujiwara Inajiro (56) Reference JP-A-2-219742 (JP, A) Kaisho 64-82124 (JP, U) S57.6.15, “Practical packaging terminology”, published by Sogo Packaging, P. 75-77 `` Print '' related items

Claims (1)

(57) [Claims] 1. A carton for a wrap film in which a wound wrap film is housed and a wrap film is provided on a side wall at a position where the wrap film is pulled out and cut, wherein the wrap film is made of an ultraviolet curable acrylic resin. A resin gross coat layer, and the unwinding prevention layer is provided in the printing step in the production of the wrap film carton, either directly on the side wall or via an anchor coat layer. carton.