JPH09132235A - Wrapping-film housing box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wrapping-film housing box which satisfies a water resisting property, a friction resistance, a folding endurance and an antibacterial property by a method wherein a wrapping film which is pulled out from a rolled film is cut by a cutting apparatus being arranged on the box, for such a wrapping film, the surface of the box body is covered with a bridging type polyester based acrylate resin thin film layer which contains an antibacterial agent. SOLUTION: A box for containing a wrapping film is a box body of which the major components are a front plate 1, a bottom plate 2, a rear plate 3, a lid plate 4, a side plate 8 and a covering lid piece 5, and on the rear surface sides of a side covering lid piece 11 which extends in the direction to cover the side plate 8 from the lid plate 4 and the leading end edge part of the covering lid piece 5, a cutting apparatus K is fixed. Then, a required quantity of the wrapping film F is pulled out from a rolled film R which is housed in the housing box, and the pulled out film F is cut by the cutting apparatus K. In this case, a support paper which becomes the housing box is formed of a multiple layer structure wherein a surface decorative layer is superposed on a paper board, and the top is covered with a bridging type polyester based acrylate resin thin film layer containing an antibacterial agent. By doing so, excellent water resisting property, folding endurance and antibacterial property are obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for improving a wrap film storage box that is generally used in general households, food sales businesses and the like.

[0002]

2. Description of the Related Art Heretofore, a columnar box and a wrapping film storage box made of a rolled film stored in the box body have been widely commercially available and well known. As this columnar box, for example, various types such as a columnar shape and a polygonal columnar shape of a triangle to an octagon are known. A general-purpose quadrangular prismatic box body is described, for example, in JP-A-6-293336 and is shown in the schematic views of FIGS. Most of this type of box is made of paperboard and is formed by bending each part plate surface at each folding line portion at a substantially right angle. The front plate 1, the bottom plate 2, the rear plate 3, the lid plate 4, the side plate, It is a rectangular box body whose main part is a cover lid piece 5 extending from the plate 8 and the cover plate 4 in the direction to cover the front plate 1, and has a side cover lid piece 11 extending from the cover plate 4 in the direction to cover the side plate 8. It was done. A necessary amount of the wrap film F is drawn out from the winding film R stored in the box body, and is cut along the cutting tool K which is fixed to the tip of the covering lid piece 5 by the caulking tool 12 along the longitudinal direction of the box body and arranged. It is of the form used. The disposition position of the cutting tool K is a position where the blade edge of any one of the upper surface of the front plate 1, the vicinity of the ridge between the front plate 1 and the bottom plate 2, and the tip of the covering lid piece 5 protrudes from the plate surface. There are many things. 2 and 3 show a storage box in which a cutting tool K is arranged at the tip of the lid piece 5, FIG. 2 is a perspective schematic view showing the state after opening, and FIG. 3 shows the storage box. It is a schematic plan view showing the shape of the paperboard.

On the surface of this type of storage box, there is a decorative surface cosmetic layer that is conspicuous in shops and is used at home to meet harmony with kitchen furniture. Specifically, for example, vegetables. There is an ink layer that draws designs such as fruits and flowers, product names, operating procedures and notes. Further, in the case of a white background used to make letters and designs stand out, there is also a case where the surface white of the white clay layer produced as the paperboard outer layer is used as it is. The surface decorative layer is water resistant so that the box body does not soften immediately even when handled with wet hands, abrasion resistance against rubbing between boxes during transportation, slippage of the box surface required for display arrangement, ink on the broken line portion. It is also performed with the goal of satisfying the required performance such as folding resistance against layer breakage, and many cover 90% or more to 100% (almost all) of the outer surface of the box. The outer surface portion exposed to the outside of the box body when referred to here is the front plate 1, the bottom plate 2, the rear plate 3, the lid plate 4, the cover lid piece 5, and the side plate 8 in FIG.
And the entire outer surface of the six sides including the side cover lid piece 11.

Nowadays, consumers tend to demand a high degree of cleanliness for this type of storage box. What is this high level of cleanliness?
Molds will not be generated due to dirt due to liquid seasonings attached to the outer surface of the box, or bacteria attached to the box when used by the previous person It is desired to develop a box body that adheres to a hand and is not transferred to food through the hand, that is, a box body having an antibacterial effect or a growth killing effect of bacteria and mold.

However, the surface decorative layer of the current commercial storage box is not satisfying the above-mentioned market demand for antibacterial properties. On the other hand, application of a resin thin film layer (so-called varnish) is described in, for example, JP-A-6-183437 and JP-A-6-293336. However, the resin thin film layers described therein are merely provided on a part of the surface for the purpose of easy opening of the box and maintaining the appearance quality after opening, and do not have antibacterial properties.

[0006]

The object of the present invention is not only to improve the conventional performance requirements such as water resistance, abrasion resistance, slippage, and folding resistance, but also to satisfy the above antibacterial properties. To provide a storage box.

[0007]

DISCLOSURE OF THE INVENTION The present invention comprises a columnar box and a winding film housed inside the box body, and draws a necessary amount of wrap film from the winding film.
In the storage box of the wrap film used by cutting the drawn film with a cutting tool arranged in the box, the surface of the box body is covered with a crosslinkable polyester acrylate resin thin film layer containing an antibacterial agent, To do.

The present invention is different from the conventional product in that the surface decorative layer covering the outer surface portion of the storage box is covered with a cross-linkable polyester acrylate resin thin film layer containing an antibacterial agent. Therefore, the structure of the entire storage box may be the same as the conventional product. Hereinafter, the content of the present invention will be specifically described with reference to the drawings. FIG. 2 is a schematic perspective view showing the overall structure of the storage box as an example of the storage box of the present invention, FIG. 3 is a schematic plan view of a mount that becomes the storage box of FIG. 2, and FIGS. 1 (A) and 1 (B) are diagrams. It is a cross-sectional schematic diagram of the mount which becomes the storage box of 2.

In FIG. 2, this storage box is mainly composed of a front plate 1, a bottom plate 2, a rear plate 3, a cover plate 4, a side plate 8, and a cover lid piece 5 extending from the cover plate 4 in a direction to cover the front plate 1. And a cutting tool K is fixed by caulking to the back side of the leading edge of the side cover lid piece 11 and the cover lid piece 5 extending from the cover plate 4 in the direction to cover the side plate 8. It is a storage box. This box body is cut and removed by a cutting line 10 while advancing the peeling of a portion of the local joint 9 where the back surface of the unsealing piece 6 and the front surface of the front plate 1 are bonded together, and the unwrapped wound film is stored. A necessary amount of the wrap film F is pulled out from R, and the wrap film storage box used by cutting with a cutting tool K provided along a longitudinal direction of the box at a predetermined portion of the box is used. It was created by bending and pasting.

The mount that forms the storage box of the present invention is shown in FIG.
As shown, the surface decorative layer S is superposed on the paper board P, and the surface decorative layer S is further covered with a crosslinkable polyester acrylate resin thin film layer T containing an antibacterial agent.
FIG. 1B is an example of a case where the resin thin film layer located on the outer surface is made into two layers (T and T ′). At this time, the outermost thin film layer T is a crosslinkable polyester acrylate resin thin film layer T containing an antibacterial agent.

Bacteria generally consist of prokaryotic cells and multiply when cells divide. On the other hand, the antibacterial mechanism by the antibacterial agent is considered to be killing of bacteria by bactericidal active oxygen generated in the vicinity of the antibacterial agent, dysfunction of the cell membrane of the bacteria and destruction of the cell membrane by the antibacterial agent, and the antibacterial effect is very close to that of the bacteria or It is considered to be achieved by placing an antibacterial agent at a position where it contacts bacteria. For example, a large amount of antibacterial agent is kneaded into a resin, and a slight part of the material is exposed on the surface of the resin to exert an effect.

However, in the storage box for the wrap film, when the antibacterial agent is kneaded into the paperboard of the base material, the antibacterial agent is covered with the surface decorative layer and does not come into direct contact with bacteria and has no antibacterial effect. When it is attempted to include an antibacterial agent in the surface decorative layer, generally, the antibacterial agent is usually a fine powder in which an antibacterial component is supported on a porous body, and it is difficult to uniformly disperse the antibacterial agent in the ink. By disposing the antibacterial agent in the white clay layer obtained by solidifying clay with a binder (adhesive), the antibacterial agent is buried in the binder, and the antibacterial effect is significantly reduced.

On the other hand, according to the storage box of the present invention having a layered structure typified by FIG. 1 (A), it is not possible to use a conventional mount having a structure in which the surface decorative layer S overlaps the paperboard P. Further, the antibacterial property is exhibited by covering the surface decorative layer S further with a crosslinkable polyester acrylate resin layer containing an antibacterial agent. Further, the significance of forming the crosslinkable resin layer into two layers shown in FIG. 1B is that the resin layer for antibacterial property is expressed by the thinned crosslinkable polyester-based acrylate resin layer T. The thickness of the crosslinkable resin layer that is sufficient to enhance the conventional required performance such as abrasion resistance is covered by the entire crosslinkable resin layer, which is the sum of the T layer and the T'layer, and the conventional required performance and effective It is intended to impart both antibacterial properties.

The crosslinkable polyester-based acrylate resin thin film layer of the present invention is one in which a crosslinkable polyester-based acrylate resin is selected as a base resin from among many types of crosslinkable acrylate-based resins. The first reason for selecting the polyester acrylate is that the antibacterial properties of the resin base material itself are superior to those of other resins. That is, if this is replaced with, for example, a polyurethane acrylate, an epoxy acrylate or a polyol acrylate, it is difficult to obtain the target antibacterial effect.

The second reason for selecting the polyester acrylate is that the thinning of 3 μm or less can be realized in the state of uniform wall thickness, and the fixing of the antibacterial agent is highly uniform. You can Therefore, if you replace this with, for example, an alkyd acrylate,
The target uniformity of antibacterial agent fixation cannot be obtained. Crosslinking of crosslinkable polyester-based acrylate resin is UV irradiation,
It can be performed by electron beam irradiation, heat beam irradiation, or the like. Of these, crosslinking by irradiation with ultraviolet rays is desirable because the apparatus to be installed is inexpensive and easy to handle.

As a secondary effect of covering the surface decorative layer further with a resin thin film layer, the water resistance, abrasion resistance, slipperiness, folding resistance, etc. of the box itself are better than those of commercially available boxes. It is to raise. For example, when the white clay layer is a surface decorative layer, water resistance is improved, and when the ink layer is a surface decorative layer, abrasion resistance and folding resistance are significantly improved.

The thickness of the crosslinkable resin thin film layer as a whole (T or T + T ′) is 0.2 to 5.0 μm.
A thin film layer having a thickness of less than 0.2 μm is liable to be cracked and chipped, and a thin film layer having a thickness of more than 5.0 μm is unlikely to have a uniform thickness. The layer thickness is preferably 0.2 to 3.0 μm from the viewpoint of enhancing both of the above. As shown in FIG. 1 (B), the resin thin film layer efficiently exposes the antibacterial agent in the vicinity of the surface, and the water resistance, abrasion resistance, slipperiness,
You may make it multilayered for the purpose of ensuring folding endurance. In that case, at least the outermost surface preferably has a thickness of 0.2 to 3.
The crosslinkable polyester-based acrylate resin layer T containing 0 μm of the antibacterial agent is used, and the thickness of the crosslinkable resin layer corresponding to T ′ is preferably 1.0 to 2.0 μm. For the crosslinkable resin layer corresponding to T ′, it is preferable to use a crosslinkable polyester acrylate resin in consideration of the affinity with the T layer. or,
To the resin forming the crosslinkable resin thin film layer, in addition to a neutral surfactant and a neutralizing agent, a small amount (5% by weight or less) of various auxiliaries such as antibacterial agent dispersibility improving and coating property improving is added. May be.

The antibacterial agents used in the present invention include pyridine type, triazole type, thiazoline type, metal ion type, etc.
Any substance widely used as a general antibacterial agent may be used.
It is well known that this kind of antibacterial agent prevents the growth of bacteria and mold spores and has an odor and mold prevention effect. In particular, as an effective antibacterial agent for a storage box, it is preferable to employ a pyridine-based agent having excellent antibacterial properties against Escherichia coli, Staphylococcus aureus and the like existing around the kitchen.
Although these antibacterial agents may be the antibacterial components themselves, many of them are supported on a porous material such as silica gel, phosphate, zeolite, apatite or the like for the purpose of sustaining the antibacterial effect.

The average particle size of the antibacterial agent (the particle size of the porous material supported on the porous material) is 0.2 to 5.0 μm. It is preferably 0.2 to 3.0 μm. The reason is that if the particles of the added antibacterial agent are completely buried in the resin thin film layer, or if the particles of the added antibacterial agent largely protrude from the resin thin film layer, they fall off from the resin thin film layer during use of the box and the antibacterial effect disappears. That is, it is preferable that the average particle diameter of the antibacterial agent and the thickness of the resin thin film layer are substantially the same.

The content of the antibacterial agent (the content of the material supported on the porous body including the porous body) is determined by the antibacterial performance of the antibacterial agent. Usually, it is 0.3 to 5.0% by weight, preferably 0.3 to 1.0% by weight. If it is less than 0.3% by weight, the antibacterial performance is not sufficient, and if it exceeds 5.0% by weight, it is difficult to uniformly disperse it with the resin and the antibacterial uniformity is not sufficient.

The portion on which the resin thin film layer is applied is the entire 6 outer surfaces including the front plate 1, the bottom plate 2, the rear plate 3, the lid plate 4, the cover lid piece 5, the side plate 8 and the side cover lid piece 11 in FIG. However, it is also possible to apply a resin thin film layer containing no antibacterial agent to a portion which is less likely to be touched directly by the local bonding portion 9.
Etc. may not be provided with a resin thin film layer. The paperboard used in the present invention is a thick paper having a thickness of about 0.35 to 1.5 mm. Generally, the thicker the paper, the higher the rigidity, the strength and the strength of the box, but the folding process becomes difficult. Thickness 0.3
A relatively thin paperboard within a range of 5 to 0.8 mm (basis weight of 310 to 550 g / m ² ) is adopted.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to Examples and Comparative Examples. The evaluation method and evaluation scale used in the present invention are as follows. (1) Antibacterial performance (1-1) Antibacterial property One side of the box was cut into 4 cm squares and used as a test paper, and the culture solution of Staphylococcus aureus had a viable cell count of 10 ⁵
The number of viable cells on the printed surface portion was measured after dropping the solution so that the number of cells was about 25 and culturing at 25 ° C. for 24 hours. Two test papers were cut out from two predetermined surfaces of each box, and the results were averaged. Table 1 (1) shows the evaluation scale.

(1-2) Uniform Dispersion of Antibacterial Agent The dispersion state of the antibacterial agent in the resin thin film layer is examined by an optical microscope (about 20).
Doubled), and the uniformity and the presence or absence of particle aggregation were evaluated. Table 1 (2) shows the evaluation scale.

[0024]

[Table 1]

(2) Water resistance Five monitors (housewives) were carefully selected, and the following tests were carried out on five storage boxes per monitor. An operation of pulling out a film having a length of about 15 cm from the storage box and cutting the film was repeated until the wound layer film (20 m roll) was used. The carrying of the storage box by hand at this time is carried out with the palm always wet with water after each cutting operation. After the test, evaluation was performed by the number of boxes in which buckling and wavy deformation of each ridge were observed in a total of 25 storage boxes.
Table 2 shows the evaluation scale.

[0026]

[Table 2]

(3) Abrasion resistance 100 storage boxes were prepared, and the storage boxes were put in two cardboard boxes each capable of packing a total of 50 boxes in 5 rows and 10 columns, and were transported back and forth between Tokyo and Suzuka by truck for comparison. Repeated three times. After the test, the number of storage boxes in which the surface decorative layer was damaged by rubbing between the boxes was evaluated. Table 3 shows the evaluation scale.

[0028]

[Table 3]

(4) Sliding property In accordance with ASTM-D-1894, a dynamic strain measuring device (DS
6 / MTL: manufactured by Tester Sangyo Co., Ltd., and the dynamic friction coefficient was determined. Place a 200g rider (weight) on a part of the outer surface of the storage box cut into a 4cm x 10cm square so that the back surface of the storage box cut into a 3cm square is in contact with a part of the outer surface. It was calculated from the frictional resistance when moved at a speed of 1 / min. Table 4 shows the evaluation scale.

[0030]

[Table 4]

(5) Folding endurance A film of about 15 cm in length is pulled out from the storage box, and the operation of cutting the film is carried out for three roll layers (20 m rolls) (2
Replenishment from the first) was repeated. After the test, the evaluation was made by the fracture length of the surface decorative layer on the ridge between the lid of the storage box and the covering piece. Table 5 shows the evaluation scale.

[0032]

[Table 5]

The box used for the experiment is shown below. Using thick paper with a thickness of 0.5 mm (basis weight of 400 g / m ² ) as a base material,
In a commonly used and well-known method, a board mount for a storage box with a box length of about 310 mm, in which a cutting tool K is fixed by a crimping claw 12 to the back surface of the tip of the covering lid piece as shown in FIG. 2 (B). A width dimension of about 300 m, which is prepared, folded and laminated by a known method, and wound as a wrapping film R on a paper tube.
A vinylidene chloride resin film [trade name: Saran Wrap (manufactured by Asahi Chemical Industry Co., Ltd.), winding amount 20 m] of m was used as a box body. FIG. 2 (A) is a diagram when the unsealed piece 6 of the obtained box body is removed to bring it into an unsealed state.

[0034]

EXAMPLES, COMPARATIVE EXAMPLES, REFERENCE EXAMPLES In the following experimental examples, only the cross-sectional structure of the mount used in the storage box shown in FIG. 1) Experiment No. 1 is a surface decorative layer S made of white ink
Is covered with a UV-curable polyester acrylate resin thin film layer T containing an antibacterial agent. Specifically, the resin for the T layer is a polyester acrylate (trade name: Flash Dry, manufactured by Toyo Ink Mfg. Co., Ltd.) with a thickness of 1 μm, and the antibacterial agent is cesylpyridinium supported on a sparingly soluble phosphate ( It is manufactured by Lhasa Industry Co., Ltd., and the product name is Lasp). The content of the antibacterial agent is 1%, and the average particle size is 1 μm.

2) Experiment No. No. 2 of the experiment No. 2 except that the content of the antibacterial agent was 0.3%. It is the same as 1. 3) Experiment No. Experiment No. 3 was the same as Experiment No. 3 except that the content of the antibacterial agent was 5%. It is the same as 1. 4) Experiment No. Experiment No. 4 was the same as Experiment No. 4 except that the resin for the T layer was an ultraviolet curing epoxy acrylate. It is the same as 1.

5) Experiment No. Experiment No. 5 was the same as Experiment No. 5, except that the resin for the T layer was an ultraviolet-curable polyurethane acrylate. It is the same as 1. 6) Experiment No. Experiment No. 6 was the same as Experiment No. 6 except that the resin for the T layer was an ultraviolet-curable polyol-based acrylate. It is the same as 1. 7) Experiment No. No. 7 is the experiment No. 7 on the paperboard. 1 is a paper having a cross-sectional structure covered with a surface decorative layer made of white ink containing the same amount of the same antibacterial agent as that of No. 1.

8) Experiment No. Experiment No. 8 is The paper having a cross-sectional structure in which the surface decorative layer made of white ink is covered on the paperboard containing the same amount of the same antibacterial agent as that of No. 1 is used. 9) Experiment No. Experiment No. 9 was the same as Experiment No. 9 except that the content of the antibacterial agent was 0.2%. It is the same as 1. 10) Experiment No. Experiment No. 10 was the same as Experiment No. 10 except that it was an ultraviolet curing epoxy acrylate containing no antibacterial agent. It is the same as 1.

11) Experiment No. Experiment No. 11 was the same as Experiment No. 11 except that it was a UV-curable polyurethane acrylate containing no antibacterial agent. It is the same as 1. 12) Experiment No. Reference numeral 12 denotes a current commercial product [a storage box containing a product name: Saran Wrap (manufactured by Asahi Kasei Corporation)]. 13) Experiment No. Reference numeral 13 denotes an antibacterial agent in which benzalkonium is carried on a sparingly soluble phosphate (manufactured by Lhasa Co., Ltd.,
Experiment No. except that the product name: Lasap) was changed. 1
Is the same as

14) Experiment No. 14 is the same as Experiment N0.1 except that the thickness of the resin thin film layer was changed to 0.3 μm and the average particle diameter of the antibacterial agent was changed to 0.3 μm. 15) Experiment No. 15 is a resin thin film layer having a thickness of 5 μm,
Experiment N except that the average particle size of the antibacterial agent was changed to 5 μm
O. It is the same as 1. 16) Experiment No. Experiment No. 16 was the same as Experiment No. 16 except that the content of the antibacterial agent was 5%. It is the same as 1.

17) Experiment No. No. 17 of Experiment No. 17 except that the thickness of the resin thin film layer was changed to 0.2 μm and the average particle diameter of the antibacterial agent was changed to 0.2 μm. It is the same as 1. 18) Experiment No. 18 is a resin thin film layer having a thickness of 6 μm,
Experiment N except that the average particle size of the antibacterial agent was changed to 6 μm
O. It is the same as 1. 19) Experiment No. No. 19 of the experiment No. 19 except that the content of the antibacterial agent was 6%. It is the same as 1.

20) Experiment No. No. 20 was an experiment N except that the resin was an ultraviolet-curable alkyd acrylate.
O. It is the same as 1. Experiment NO. The antibacterial properties of 1 to 12 were evaluated by the method described above, and the results are shown in Table 6.

[0042]

[Table 6]

The results in Table 6 show the following. That is, (1) a commercial product, a paperboard containing an antibacterial agent, and a resin film layer containing no antibacterial agent have no antibacterial effect. (2) The antibacterial property is particularly exhibited when the ultraviolet curable polyester acrylate contains an antibacterial agent,
And the content is 0.3% or more.

Next, the experiment No. 1, 6, 11, 13-20
Was evaluated for antibacterial performance by the method described above, and the results are shown in Table 7.

[0045]

[Table 7]

The results in Table 7 show the following. That is, (3) the antibacterial performance is exhibited by a UV-curable polyester acrylate containing an antibacterial agent, and the content of 5% or less is effective. (4) The thickness of the resin thin film layer in which antibacterial performance and other performance are harmonized is 0.3 μm or more and 5 μm or less.

[0047]

As shown in the above results, the storage box of the present invention not only enhances the conventional performance requirements such as water resistance, abrasion resistance, slippage, and folding resistance, but also has antibacterial properties. It is possible to provide a storage box for the wrap film.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a mount that serves as a storage box of the present invention.

FIG. 2 is an explanatory view of the storage box of the present invention, and is a schematic perspective view showing a state after the storage box is formed.

FIG. 3 is an explanatory view of the storage box of the present invention, and is a schematic plan view of a mount that becomes the box body of FIG. 2.

[Explanation of symbols]

 1 Front Plate 2 Bottom Plate 3 Rear Plate 4 Cover Plate 5 Cover Lid 6 Opening Piece 7 Auxiliary Side Plate 8 Sideboard 9 Local Joint 10 Cutoff Line 11 Side Cover Lid 12 Caulking Tool K Cutting Tool R Winding Film F Film P Paperboard S Surface decorative layer T, T'resin thin film layer

Claims (1)

[Claims] 1. A columnar box and a winding film housed inside the box body. A required amount of wrap film is drawn from the winding film, and the drawn film is cut by a cutting tool provided in the box. A storage box for a wrap film, wherein the surface of the box body is covered with a cross-linkable polyester-based acrylate resin thin film layer containing an antibacterial agent.