JPH101185A - Cd storage body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a stored CD, and in particular, to prevent a recording surface of the CD from being damaged while a package of envelope type is used. SOLUTION: A protective sheet 30 is stored in a flat, paper bag body 10 together with a CD 20 so that the protective sheet 30 is abutted on a recording surface of the CD 20. Because the protecting condition of the CD 20 is improved, accidents of breakage are reduced in number in handing the CD while it is carried, and the recording surface of the CD 20 is prevented from being damaged. The cost can be reduced by using a foamed sheet as the protective sheet 30, and printing is possible thereon, and the range of choices of the design can be extended.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact disc (CD) used when a compact disc (CD) is attached as an appendix to a book such as a magazine.

[0002]

2. Description of the Related Art Conventionally, when a CD is attached as an appendix to a book such as a magazine, it is generally put in a package such as cardboard or a plastic bag, and the package is sandwiched between pages of the book to form a sales form. Was done. However, this sandwiching method has a problem in quality assurance because the package containing the CD is easily detached during the distribution stage such as during transportation, and is liable to be stolen when sold at a store. Recently, this package itself is bound as a whole page, bound at the beginning or end of the page, or bound to any page, and bound in a flat or perfect binding form, or the package itself is attached as a part of a page and integrated. A saddle stitch book, a flat stitch book, or a perfect book stapled in a form of binding the book at the beginning, end, or an arbitrary page is sold. Among the packages used for this binding type, a package made of paperboard is used as a package as a whole page, and a paper envelope is used as a package integrated as a part of a page. Is used.

[0003]

With respect to a book in which a CD is bound using the above-described paperboard package, the entire book is thick and bulky, and since the package itself has no flexibility, pages are removed even after the CD is taken out. However, there is a problem that it is difficult to turn over, and further, there is a problem that the material cost is not so low. On the other hand, a book in which a CD is bound using an envelope-shaped package does not have a problem peculiar to such a paperboard package, and the CD is attached to many magazines. It is more desirable to use a book with an easy-to-use envelope-shaped package attached.

However, when a CD is stored in the above-described envelope-shaped package, the front and back surfaces of the CD are each protected by only one sheet of paper. is not. Especially when books such as magazines are bundled and transported with a string, if the handling during transportation is rough, the CD inside will be cracked or the recording surface will be scratched, but this probability is high in envelope-shaped packages. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to protect a stored CD while using an envelope-type package. It is an object of the present invention to provide a CD storage body in which the recording surface of the CD is not scratched.

[0006]

In order to achieve the above object, the present invention provides a CD container, in which a protective sheet is provided together with a CD in a flat bag made of paper. It is characterized in that it is stored in a state of contact with

The protective sheet is not particularly limited to its material as long as it has a cushioning property, but it is preferable to use a foam sheet in terms of cost and printability.
Specifically, a foamed sheet comprising a foamed layer of a thermoplastic resin, a base layer mainly made of paper, and a thermoplastic resin layer is used at least from the outer surface side.
Is stored in the bag together with the CD in the direction in which it comes into contact with the recording surface. Then, a transparent varnish layer is preferably provided between the foam layer and the base material layer in the foam sheet. By providing this transparent varnish layer, foaming is sufficient, and a uniform foamed layer without unevenness can be obtained as a whole. Further, a printing layer may be provided between the base material layer and the transparent varnish layer or between the foam layer and the transparent varnish layer.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a CD storage body according to the present invention before storage. As shown in the figure,
The CD storage body includes an envelope-shaped bag body 10, a CD 20 and a protection sheet 30 housed therein, and the CD 20 and the protection sheet 30 are inserted from the opening of the bag body 10 as shown in the drawing.
It is produced by closing the margin piece 15 to be in a housed state. In this case, the protection sheet 30 is stored in a state of contacting the recording surface (back surface) 21 of the CD 20.

The bag 10 shown in FIG. 1 is made of one sheet. That is, a sheet punched into a shape in which the back plate portion 12 is continuously provided on one side of the front plate portion 11 and the margin pieces 13, 14, 15 are continuously provided on the remaining three sides, respectively, is used. Then, after the opposing glue pieces 13 and 14 are folded back, respectively,
The back plate portion 12 may be folded back so as to overlap with 1, and bonded to the margin pieces 13 and 14. Then, the CD 20 is inserted together with the protection sheet 30 from the remaining glue margin 15, and the glue margin 15 is folded back to form the back plate 12.
A CD storage body is manufactured by sticking to the back surface side of. The CD storage body thus manufactured is glued and bound to an arbitrary page of the book. In addition, the bag body 10 is not limited to the one shown in FIG.

The protective sheet 30 needs to have a cushioning property on at least one side. The shape is C
Any shape that is larger than D20 and can be inserted into the bag body 10 may be used. Considering ease of insertion, a U-shape or a circle is preferable.

Here, a foam sheet is used as the protection sheet 30. FIG. 2 is a cross-sectional view showing an example of a laminate that becomes a foam sheet by heating. Paper 3
1 and a transparent varnish layer 32 and a printed layer 33 on the surface side.
These layers are covered with a thermoplastic resin 34, and a thermoplastic resin layer 35 is provided on the back surface side. The order of the transparent varnish layer 32 and the printing layer 33 may be any order.

The base paper 31 has a basis weight of 100 to 400 g.
/ M ² , and the water content is preferably in the range of 3 to 10%. It is more preferable to stabilize in the range of 5 to 8% if possible. Then, the water in the paper 31 is evaporated by heating, and the thermoplastic resin 34 on the surface side is heated by the vapor pressure.
Is to be foamed.

The transparent varnish layer 32 is provided on the surface of the base paper 31 or on the printing layer 33, and is applied mainly by a printing method. Above all, a method using gravure printing is preferable. Another method is by coating. The composition of the transparent varnish used is mainly composed of a synthetic resin containing an extender. As the synthetic resin, nitrified cotton, polyurethane resin, polyamide resin, polyvinyl chloride resin, acrylic resin, and a resin obtained by mixing these can be used. In addition, as the extender, titanium oxide, calcium carbonate, magnesium carbonate, and a mixture thereof can be used. As a solvent or a diluting solvent, toluene, ethyl acetate, methyl ethyl ketone, isopropyl alcohol and the like can be used. The coating amount is preferably 2-3 g / m ^{2 in} a dry state after coating.

The printing layer 33 is provided on the surface of the base paper 31 or on the transparent varnish layer 32. This printing layer 33 is not always necessary, but when it is provided, for example, a CD
It is a preferable example to apply characters, pictures, and the like that match the contents of the above. Then, the printing layer 33 may be partially printed with colored ink as shown in FIG. 2A, or may be printed entirely with colored ink as shown in FIG. 2B. is there. The printing position, the size of the printing area, the printing method, the ink used, and the like can be appropriately selected from conventionally known techniques and used.

As described above, the transparent varnish layer 32 and the printing layer 3
The order of 3 can be any. The type shown in FIGS. 2A and 2B is obtained by printing a paper 31 and then applying a transparent varnish. The type shown in FIG.
Is coated with a transparent varnish and printed. In this case, the application of the transparent varnish improves the smoothness of the surface of the paper 31 and improves the printability. Further, as shown in FIG. 2D, a transparent varnish can be applied to a portion of the print layer 33 where no printing is performed. In either case,
The thickness of the foam layer after heating becomes uniform.

The thermoplastic resin used in the present invention is a polyethylene resin, a polypropylene resin, a polyester resin,
Examples include polyvinyl chloride resin and polystyrene resin.
This thermoplastic resin is laminated on both the front and back surfaces of the base paper 31 on which printing and transparent varnish have been applied. The method of laminating includes an extrusion coating method in which a resin is hot-melted and applied,
Alternatively, there is a laminating method of laminating a film. The thickness of the thermoplastic resin on the surface to be the foamed layer is preferably in the range of 15 to 50 μm. It becomes difficult to foam if it is too thick or too thin. On the other hand, the thickness of the thermoplastic resin layer on the back surface is not particularly limited. However, in order to foam only the front surface without foaming the back surface, as a method of preventing evaporation of water vapor from the back surface, a layer such as an aluminum foil is provided between paper and a thermoplastic resin layer, or the back surface is heated. As the thermoplastic resin, a thermoplastic resin having a higher softening point than the thermoplastic resin on the surface is used. For example, in the case of a polyethylene resin, a high-density polyethylene resin having a high softening point can be used as the thermoplastic resin on the back surface.

The sheet shown in FIG. 2 is punched into a size to be used, and heated to form a foamed sheet. That is, by heating, the water in the paper 31 evaporates,
The vapor pressure and the thermal expansion of the air work together to produce a foamed structure in the surface thermoplastic resin layer. As the heating means, hot air, infrared rays, far infrared rays, microwaves, high frequencies and the like can be used. The heating conditions are preferably a temperature of 100 to 200 ° C. and a time of 10 seconds to 5 minutes.

[0019]

【Example】

Example 1 A picture layer was partially formed by gravure printing on the surface of a paper having a basis weight of 220 g / m ² and a water content of 8.0%, and a transparent varnish layer was formed thereon by gravure printing. As the transparent varnish, a mixture of nitrified cotton containing an extender and a polyurethane resin as main components and a mixture of toluene, ethyl acetate, methyl ethyl ketone, and isopropyl alcohol as a solvent is used. The plate used has 17 lines.
5 lines, 35 μm depth, and the amount of coating is 2.
It was 5 g / m ² . Further, on the surface side (transparent varnish layer side), a low-density polyethylene resin layer having a thickness of 40 μm,
On the back surface, a polyethylene resin layer in which low-density polyethylene and high-density polyethylene were mixed was provided with a thickness of 15 μm by extrusion coating. This stack is CD
After punching into a slightly larger U-shape, the sheet was heated in a dryer at 120 ° C. for 3 minutes to obtain a foam sheet (protective sheet) having a foam layer 36 on the surface as shown in FIG.

Example 2 A 7 μm aluminum foil was adhered to the back of the paper using a molten polyethylene resin, and a 20 μm low-density polyethylene resin layer was formed by extrusion coating. Then, a laminated body was prepared, and thereafter, a foamed sheet having a foamed layer on the surface was obtained in the same steps as in Example 1.

Example 3 A transparent varnish was applied to the back surface by gravure printing to form a transparent varnish layer, and a low-density polyethylene resin layer of 20 μm was formed by extrusion coating. A laminated body was prepared by the same procedure as in Example 1 to obtain a foamed sheet having a foamed layer on both the front and back surfaces.

[0022]

As described above, in the CD storage body of the present invention, the protection sheet is stored together with the CD in the envelope type package in a state where the protection sheet is in contact with the recording surface of the CD. Because it will be better in a protected state,
It is possible to reduce the number of breakage accidents during handling during transportation or the like, and particularly to prevent scratches on the recording surface of the CD.

By using a foamed sheet as the protective sheet, the cost can be reduced, and printing can be performed, so that the range of design choices is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a CD storage body according to the present invention before storage.

FIG. 2 is a cross-sectional view illustrating an example of a laminate that becomes a foam sheet by heating.

FIG. 3 is a cross-sectional view illustrating an example of a foam sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Bag body 11 Front plate part 12 Back plate part 13,14,15 Glue piece 20 CD21 Recording surface 30 Protective sheet 31 Paper 32 Transparent varnish layer 33 Printing layer 34 Thermoplastic resin layer (front side) 35 Thermoplastic resin layer ( (Back side) 36 foam layer

Claims (5)

[Claims] 1. A CD storage body characterized in that a protection sheet is stored together with a CD in a flat bag made of paper, with the protection sheet in contact with the recording surface of the CD. 2. A foamed layer of a thermoplastic resin, a base layer mainly composed of paper, at least from the outer surface side,
2. The CD storage body according to claim 1, wherein a foamed sheet having a thermoplastic resin layer is used, and the foamed sheet is stored in the bag body in a direction in which the foamed layer comes into contact with a recording surface of a CD. 3. A transparent varnish layer is provided between the foam layer and the base material layer in the foam sheet.
CD storage body described in 1. 4. The CD container according to claim 3, wherein a printing layer is provided between the base layer and the transparent varnish layer. 5. The CD container according to claim 3, wherein a printing layer is provided between the foam layer and the transparent varnish layer.