JP4170425B2 - Storage case - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a storage case, and more particularly, a recording medium such as a CD (compact disc), a DVD (digital video disc), an IC, an LSI, an FD (floppy disc), an MD (mini disc), a coin, and the like. , Medal, chocolate and other food / confectionery storage cases.
[0002]
[Prior art]
Conventionally, recording media such as CDs (compact discs), DVDs (digital video discs), ICs, LSIs, FDs (floppy discs), MDs (minidiscs), and plate-like foods and confectionery such as coins, medals and chocolates As the storage case, a plastic case as shown in FIG. 1 is often used. And in order to prevent the breakage | damage in a distribution | circulation, damage, etc., it wraps with a buffer material or inserts a buffer material sheet | seat. In the case of a CD, a fitting holder for locking the center hole of the CD is provided for fixing in the storage case. In addition to plastic, a paper storage case as shown in FIG.
[0003]
[Problems to be solved by the invention]
However, the above plastic storage case needs to be accompanied by a printed matter, there is a risk of cracking when dropped, and it is good for mass production. However, there is a problem in that it is necessary to devise a buffering property. There is also a problem with disposal when it is no longer needed.
[0004]
Even in a paper storage case, in order to fix the contents, there is a processing step in which the paperboard is cut out according to the shape of the contents and then bonded to the mount, which is costly. From the end of the paper There is a problem in that paper dust is generated or the buffering property is insufficient.
[0005]
The present invention has been made in view of the circumstances as described above, and the object of the present invention is that it can be directly printed, so that high designability can be imparted, and the cost of the processing process is low. Another object of the present invention is to provide a storage case that has a sufficient buffering effect, is lightweight, and is easy to dispose of after use.
[0006]
[Means for Solving the Problems]
As a result of studying to solve the above problems, the present invention is a storage case composed of a mount and a lid, wherein the mount is a thermoplastic resin layer that is foamed at least by heating, and a base material layer mainly composed of paper A foam-suppressed treatment comprising a foam-processed paper provided with a water vapor permeation-preventing layer, and provided with a foam-suppressed ink printing portion using a foam-suppressed ink on a part of the surface of the thermoplastic resin layer of the mount. The storage case is characterized in that a concave non-foamed portion that is a portion for storing the disk is formed, and a compact disc, a digital video disc, an integrated circuit, a floppy disc, or a mini disc is received. The resin component of the foam suppression ink is at least one of nitrified cotton, polyvinyl chloride resin, acrylic resin, and ketone resin, and the content ratio in the total resin component is in the range of 5 to 80%. It is characterized by.
[0007]
Furthermore, a transparent varnish layer is provided between the foam layer and the base material layer in the foam processed paper, and between the transparent varnish layer and the base material layer or between the transparent varnish layer and the foam layer. A printing layer can be provided between them.
[0008]
According to the present invention, it is possible to obtain a storage case that is inexpensive in processing steps, has a sufficient buffering effect, is lightweight, and is easy to dispose of after use.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings.
[0010]
FIG. 3 is a plan view showing an embodiment of the storage case of the present invention, and FIG. 4 is a side view showing an embodiment of the storage case of the present invention. The storage case A is composed of a mount 1 and a lid, and a concave non-foamed portion 2 is provided on a part of the surface of the mount 1 made of foamed paper by a foam suppression process. The shaped contents 3 are stored. Further, the size of the concave non-foamed portion 2 is set to be approximately equal to or slightly larger than the shape of the plate-like contents 3, but the stored plate-like contents 3 can be easily taken out. In addition, a recess 4 for inserting a fingertip can be added. The depth is desirably substantially equal to the thickness of the plate-like contents 3.
[0011]
As in the present embodiment, the cover for the mount 1 can be provided by extending one side of the mount 1 and providing the flap cover 5 via the ruled line 6. The plate-like contents 3 are stored in the concave non-foamed portion 2 of the mount 1, the flap lid 5 is folded to the front side, and the mount 1 and the flap lid 5 are sealed at the ends to store them. The case A is completed, and the plate-like contents 3 can be prevented from falling. The base 1 and the flap lid 5 can be joined by a method in which the folded inner surfaces are partially heat-sealed in addition to sealing. Further, the storage case A can be put in a plastic film bag. Further, when the foam layer surface on the surface of the flap lid portion 5 is in contact with the plate-like contents 3, a cushioning effect is also obtained.
[0012]
The flap lid 5 is formed by extending one side of the mount 1 as in this embodiment, but is formed by extending two opposite sides of the mount 1 as shown in FIG. Then, a storage case B that is folded from both sides, or a flap lid 5 that is formed by extending three sides and four sides of the mount 1 as shown in FIG. Case C can also be used.
[0013]
Furthermore, after storing the plate-shaped contents 3 without providing the flap lid portion 5 extending one side of the mount 1 as shown in FIG. 7, the film, paper, etc. of the same size as the mount 1 are covered from the surface. There is also a storage case D of the type in which the mount 1 and the film are partially heat-sealed at the peripheral portion except the cover and the area of the plate-like contents 3. Since this type is sealed, it also has a function of preventing falsification, and is suitable for use in binding to a magazine or the like.
[0014]
Furthermore, a storage case E of a type in which the mount 1 storing the plate-like contents 3 in the concave non-foamed portion 2 as shown in FIG.
In either form, the storage case can be used as a postal matter by entering necessary information such as a name on the outer surface.
[0015]
Hereinafter, the foamed paper 21 used for the mount 1 of the storage case of the present invention will be described in detail with reference to the drawings. First, FIG. 9 is a diagram illustrating a material configuration of the foamed paper 11 having no non-foamed portion. The foamed paper 11 has paper as a base material layer 12 and an intermediate printing layer 13 and a transparent varnish layer 14 provided on the outer surface side. However, the intermediate printing layer 13 and the transparent varnish layer 14 are not necessarily required. Moreover, the order which provides the intermediate | middle printing layer 13 and the transparent varnish layer 14 is possible in any case. Further, these layers are covered with a thermoplastic resin layer 15 . There is a water vapor permeation preventing layer 16 on the inner surface side of the base material layer 12. In addition, a barrier layer such as a metal vapor deposition layer such as aluminum or an inorganic vapor deposition layer such as silica may be provided between the base material layer 12 and the water vapor permeation prevention layer 16 in order to improve barrier properties.
[0016]
The basis weight of the paper used as the base material layer 12 is preferably in the range of 100 to 500 g / m ² in the production of a paper container. The moisture content of the paper is desirably 3 to 10%, more preferably 5 to 8%. When the moisture in the paper is evaporated and the surface thermoplastic resin layer is foamed by the force of the vapor pressure, if the water content is less than 3%, foaming is insufficient and the thickness of the foamed layer cannot be obtained. If the water content exceeds 10%, the foamed surface may be ruptured, which is not preferable.
[0017]
The intermediate printing layer 13 is applied on the paper surface of the base material layer 12 or the transparent varnish layer 14 as described above. The intermediate print layer 13 may be printed partially with colored ink or may be printed with colored ink over the entire surface. For the printing position, the size of the printing area, the printing method, the ink used, etc., a conventionally known technique can be appropriately selected and used.
[0018]
The transparent varnish layer 14 is provided on the paper surface of the base material layer 12 or on the intermediate printing layer 13. By providing the transparent varnish layer 14, there is an effect of preventing the occurrence of unevenness caused by the influence of the intermediate printing layer 13 when the thermoplastic resin layer on the surface is foamed. As a method for applying the transparent varnish, there are methods by printing and coating. Among these, a method by gravure printing is preferable. The composition of the transparent varnish is mainly composed of a synthetic resin containing extender pigments. As the synthetic resin, nitrified cotton, polyurethane resin, polyamide resin, polyvinyl chloride resin, acrylic resin, a resin in which two or more of these are mixed, and the like can be used. As extender pigments, titanium oxide, calcium carbonate, magnesium carbonate, a mixture of two or more of these, and the like can be used. The coating amount of the transparent varnish is preferably ² to 3 g / m ^{2 in} a dry state after coating.
[0019]
The thermoplastic resin forming the thermoplastic resin layer 15 is low density polyethylene resin, linear low density polyethylene resin, medium density polyethylene resin, high density polyethylene resin, polypropylene resin, ionomer, ethylene / vinyl acetate copolymer, ethylene An acrylic acid copolymer, an ethylene / acrylic acid ester copolymer, an ethylene / vinyl alcohol copolymer, a polypropylene resin, a polyester resin, a polyvinyl chloride resin, a polystyrene resin, or the like can be used. This thermoplastic resin layer 15 is laminated on the outer surface of the base material layer 12 on which printing and transparent varnish have been applied. The lamination method includes an extrusion coating method in which a resin is melted and applied, or a lamination method in which a film is bonded. The thickness of the outer surface thermoplastic resin layer 15 to be the foam layer is preferably in the range of 10 to 100 μm. If it is less than 10 μm or exceeds 100 μm, foaming is difficult.
[0020]
The inner surface water vapor permeation preventing layer 16 has a function of preventing evaporation of water vapor from the inner surface in order to foam only the outer surface thermoplastic resin layer 15 . The water vapor permeation preventive layer 16 is formed by bonding a plastic film such as polyethylene, polypropylene, polyethylene terephthalate, polyvinyl chloride, polystyrene, or a metal foil such as aluminum, or polyethylene, polypropylene, polyethylene terephthalate, polyvinyl chloride. It can be provided by coating with a synthetic resin such as polystyrene. In particular, an extrusion coating method of a thermoplastic resin such as polyethylene can be suitably used. When this thermoplastic resin is provided, the thickness of the water vapor permeation preventing layer 16 on the inner surface is not particularly limited. Further, in order to foam only the outer surface thermoplastic resin layer 15 without foaming the water vapor permeation preventing layer 16 on the inner surface, the inner surface thermoplastic resin is the outer surface thermoplastic as a method for preventing evaporation of water vapor from the inner surface. A thermoplastic resin having a softening point higher than that of the resin is used. For example, taking a polyethylene resin as an example, a low-density polyethylene resin having a low softening point can be used as the outer surface thermoplastic resin, and a high-density polyethylene resin having a high softening point can be used as the inner surface thermoplastic resin.
[0021]
Next, the foamed paper 21 having the concave non-foamed portion 2 used for the mount 1 of the storage case of the present invention will be described.
[0022]
In the step before heating and foaming, as shown in FIG. 10A, in order to provide a concave non-foamed portion considering the shape of the plate-like contents 3 in advance, the surface portion of the thermoplastic resin layer (outer surface) 15 is provided. The foam suppression ink printing portion 17 is provided using the foam suppression ink. By providing the foam suppression ink printing portion 17, as shown in FIG. 10B, the foaming of the thermoplastic resin layer (outer surface) 15 is prevented and the non-foamed portion B is formed during the heat foaming. In other words, the thermoplastic resin layer (outer surface) 15 below the foam-suppressed ink printed portion 17 to which the foam-suppressing ink is applied can be suppressed in fluidity even when heated, or water vapor is difficult to permeate. Foaming will be suppressed. Compared to forming the foamed part A with a thickness of about 5 to 20 times that of the part not subjected to the foam suppression ink, the expansion ratio of the non-foamed part B is 1-5 times lower. The difference between the foamed portion A and the non-foamed portion B is the depth of the concave non-foamed portion. Therefore, due to the foam suppression effect of the foam suppression ink printing portion 17, a concave non-foamed portion in which the plate-like contents 3 can be stored on the mount 1 made of the foamed paper 21 can be obtained.
[0023]
Before the step of heating and foaming, before providing the foam control ink printed portion 27 with a foam control ink, the surface portion of the thermoplastic resin layer 15, FIG. 11-a, as shown in FIG. 11-b, picture It is also possible to provide the general printing portion 18 such as the above and the foam suppression ink printing portion 17 using the foam suppression ink.
[0024]
As a material for the foam suppression ink, at least one kind of resin such as nitrified cotton, polyvinyl chloride resin, acrylic resin, and ketone resin is used as the binder resin, and the content ratio in the total binder resin amount is 5 The range is ˜80%. Preferably, the content ratio is in the range of 10 to 70%. In the case of 5% or less, the foaming suppression effect does not appear. If it is 80% or more, there is a problem in terms of printability such as blocking, or heat resistance in the case of heat foaming. For example, when 100% nitrified cotton ink is used, there is a problem that the ink layer is cracked at the time of heating and foaming. In order to prevent the cracking at the time of heating by imparting the plasticity of the ink film, polyurethane resin, etc. Need to be added. The printing method can be performed mainly by gravure printing. The foam suppression ink may be colored or colorless. The amount of ink applied in printing is usually more than normal, and a thickness of 3 to 5 μm is preferable after drying.
[0025]
As an ink binder resin used for printing the general printing portion 8 such as a picture, a display, and an optical information code, a resin generally used in a packaging material can be used. For example, nitrified cotton alone or the like is used as the binder resin. The printing process can be performed mainly by gravure printing.
[0026]
9-a, FIG. 10-a, and FIG. 11-a are foamed, and foam-processed paper 21 as shown in FIG. 9-b, FIG. 10-b, and FIG. There are methods using hot air, infrared rays, far-infrared rays, microwaves, high frequencies, etc., as a heating method for obtaining the heat, a method of standing and heating using an oven, a method of heating while feeding by a conveyor, winding There are methods such as heating from the state and heating through a foaming furnace. As heating conditions, the temperature is preferably in the range of 100 to 200 ° C., and the time is preferably in the range of 10 seconds to 5 minutes.
[0027]
【Example】
Next, the present invention will be described more specifically with reference to examples.
[0028]
Example 1 First, a pattern was printed as an intermediate printing layer 13 on the surface of a paperboard (coated ball) having a basis weight of 350 g / m @ 2 in a wound state and a moisture content of 8.0%. Next, a low-density polyethylene resin layer having a thickness of 40 μm was provided as a thermoplastic resin layer 15 on the surface, and a 20-μm medium-low density polyethylene resin layer was provided as a water vapor permeation prevention layer 16 on the back surface by an extrusion coating method. Next, the winding state is cut into a sheet state (sheet shape), the back side is printed with a picture, content display, etc., and the shape of the CD is the same shape as the CD shape, with a fingertip insertion recess 4 added. The small circular holding portion 9 fixed at the center of the CD was left, and printing was performed using the foaming suppression ink, thereby forming the foaming suppression ink printing portion 17. This portion becomes a concave non-foamed portion 2 that accommodates the plate-like contents 3. Further, as a form in which the mount 1 and the lid are connected, the sheet 1 and the flap lid 5 are punched into a size as shown in FIG. It was designed in advance so that the concave non-foamed portion 2 is located at the approximate center of the portion that will be the punched mount 1. In the blank state in which the mount 1 and the flap lid 5 are continuously provided, heat foaming is performed in a dryer at 120 ° C. for 3 minutes. As shown in FIG. A storage case having a concave non-foamed portion 2 in which the plate-like contents 3 can be stored was obtained. The CD is stored in the concave non-foamed portion 2 of the mount 1, the flap lid 5 is folded, the ends of the mount 1 and the flap lid 5 are fixed with a seal, and a transparent plastic as shown in FIG. The product was put in a bag 10 made of plastic.
[0029]
【The invention's effect】
According to the present invention, it is possible to obtain a storage case that is inexpensive in processing steps, has a sufficient buffering effect, is lightweight, and is easy to dispose of after use.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a plastic case for storing a conventional plate product.
FIG. 2 is a perspective view showing a paper case for storing a conventional plate product.
FIG. 3 is a plan view showing an embodiment of a storage case according to the present invention.
FIG. 4 is a side view showing an embodiment of the storage case of the present invention.
FIG. 5 is a perspective view showing another embodiment of the storage case of the present invention.
FIG. 6 is a perspective view showing still another embodiment of the storage case of the present invention.
FIG. 7 is a perspective view showing still another embodiment of the storage case of the present invention.
FIG. 8 is a perspective view showing still another embodiment of the storage case of the present invention.
FIG. 9 is a diagram showing a material configuration of foamed paper having no non-foamed portion.
FIG. 10 is a diagram showing a material configuration of foamed paper having a non-foamed portion used for the mount of the storage case of the present invention.
FIG. 11 is a diagram showing another material configuration of foamed paper having a non-foamed portion used for the mount of the storage case of the present invention.
FIG. 12 is a perspective view showing an embodiment of the storage case of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mount 2 Recessed non-foamed part 3 Plate-shaped contents 4 Recessed part 5 for inserting a fingertip Flap lid part 6 Ruled line 7 Heat fusion part 8 Sleeve 9 Holding part 10 Plastic bag 11 No foam part Foamed paper 12 Base material layer 13 Intermediate printing layer 14 Transparent varnish layer 15 Thermoplastic resin layer 16 Water vapor permeation preventing layer 17 Foam suppression ink printing part 18 General printing part 21 Foamed paper A having a concave non-foaming part A Storage case (type of flap lid with lid extending one side of mount)
B Storage case (Flap lid type with lid extending two sides of the mount)
C Storage case (Flap lid type with the lid extending the four sides of the mount)
D Storage case (with a plastic film lid)
E Storage case (inserted into a paper sleeve)

Claims (5)

A storage case comprising a mount and a lid, wherein the mount comprises at least a thermoplastic resin layer that is foamed by heating, a base material layer mainly composed of paper, and a foam-processed paper provided with a water vapor permeation prevention layer. a part of the surface of the thermoplastic resin layer, the foam control process in which a foam control ink printed portions using the foam control ink, to form a non-foamed portions of the concave is a part for storing contents, a compact disc A storage case for storing a digital video disk, an integrated circuit, a floppy disk, or a mini disk .   The resin component of the foam suppression ink is made of at least one of nitrified cotton, polyvinyl chloride resin, acrylic resin, and ketone resin, and the content ratio of the resin in all the resin components of the foam suppression ink is 5 to 80. The storage case according to claim 1, wherein the storage case is in the range of%.   The storage case according to claim 1, wherein a transparent varnish layer is provided between the foamed layer and the base material layer in the foamed paper.   The storage case according to claim 3, wherein a printing layer is provided between the base material layer and the transparent varnish layer.   The storage case according to claim 3, wherein a printing layer is provided between the foam layer and the transparent varnish layer.

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