JPH11321958A - Compact disk storage file - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect an information recording face from deposition of dust, contamination and shock by providing a silicone-based release agent layer on a polyolefin laminate layer on one of the surfaces of a paper base and overlaying a plurality of sheets including a weak adhesive agent layer for attaching/ removing compact disks on the other layer for binding. SOLUTION: A filling layer is provided on one of surfaces of a wood-free printing paper base by solution-extruding high-pressure low density polyethylene, and an addition-reaction-type silicone-based release agent layer is further provided thereon. Then after weakly-adhesive adhesive agent comprising fine spherical particles prepared by suspension polymerization and acrylic adhesive mixed is dried, a roll of sheet 3 is manufactured to be provided on a peeling layer. Then four flat pieces of the sheet 3 unrolled from the roll of the sheet 3 are overlaid on a drawing paper for an outside back cover 2 with the weakly- adhesive adhesive agent layers upward and cut, and their ends are stopped by adhesive. Or three pieces of the sheet 3 are overlaid on the drawing paper as a cover and the outside back cover 2 with the weakly-adhesive adhesive agent layers upward and cut, thereafter a center is bound by staples, and the sheets are folded in an acute angle to be opened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention protects an information recording surface of a compact disc from dust and dirt,
The present invention relates to a compact disk storage file capable of protecting a compact disk itself from impact, deformation load, and the like, and storing a plurality of compact disks without bulk.

[0002]

2. Description of the Related Art Conventionally, a dedicated plastic case made of a relatively thick resin plate has been used as a storage for compact discs. Such a special plastic case is excellent in the function of protecting the compact disc from foreign objects, but it is bulky and relatively heavy due to the box, and it is inconvenient to carry more than one in particular. There's a problem. In addition, since the stored compact disk must have a structure that can communicate with the outside air, there is a possibility that dust adheres or dew forms and gets wet. Furthermore, there is a problem that the lid needs to be opened and closed when storing and taking out the compact disc, which is troublesome.

[0003] In addition, when a special plastic case is used, the above-mentioned problems are encountered. To prevent dust from adhering to the compact disc, a film having the same shape as the compact disc having an adhesive is attached to the compact disc. As a method of protection by attaching,
0-60019, Shokai 63-68124, Shokai 63
-157820, Japanese Utility Model Laid-open No. 1-181130, etc.
In these methods, a compact disk with a protective sheet attached is also stored in a plastic case.

As a bag-shaped body, Japanese Patent Application Laid-Open No. 6-29
8292, JP-A-10-1185, JP-A-9-3154
79, JP-A-9-255073, and many other inventions. Japanese Patent Application Laid-Open No. 6-298292 has a base material made of non-woven fabric, so it is excellent in wiping performance of fine dust and the like attached to a compact disc, does not damage the compact disc, and has shock resistance due to its rich cushioning property. It is light and suitable for carrying, easy to store and take out compact discs, and excellent in cost.
However, their performance is not sufficient, and the compact disc may come out unexpectedly because it is not fixed in the bag. As a technique for the improvement, Japanese Patent Laid-Open No. 10-11 / 1999
The invention of No. 85 has a construction in which a protective sheet having a thermoplastic resin foam layer is placed in a bag in a paper bag.
The invention of -315479 has a configuration comprising an inner bag formed of a nonwoven fabric and a semi-rigid outer bag. JP-A-9-255073
According to the invention, a film having the same shape as a compact disk having an adhesive is protected by sticking it on the compact disk, and the film is wrapped in a cardboard bag. In the case of protecting the compact disc by putting it in these bags, one compact disc is stored in one bag, and a plurality of compact discs cannot be stored together.

The invention of Japanese Patent Application Laid-Open No. 9-249278 is a disk case which does not require a protective bag and can be packaged inexpensively and efficiently. The disk case is made of a paperboard having a protective film laminated on its inner surface. A base plate and a cover plate are overlapped with each other via a line to sandwich the compact disc therebetween, and have a protruding portion on the inner surface of which a protective film is raised along the peripheral edge of the compact disc.
This case is also less expensive than a plastic case, but can only accommodate one compact disc and does not always meet the needs of the market.

[0006] The invention of Japanese Patent Application Laid-Open No. 9-328183 discloses a method in which a substrate such as a film or paper coated with a silicone resin for adhering a compact disc to a surface thereof is rectangular, square,
Alternatively, cut or cut into a horseshoe shape or the like, and in order to spell them, perform hole processing in the case of pin holder or binder method, and in the case of thermocompression bonding, high frequency welder, stack multiple sheets and cover or This is a disk flop file directly attached to the storage case. However, in the market, there is a demand for a further simplified product which can store a plurality of sheets which are not so large.

[0007]

SUMMARY OF THE INVENTION The present invention provides a compact disk storage file in which such a problem has been solved. That is, the present invention protects the information recording surface of the compact disc from dust adhesion and dirt, and protects the compact disc itself from impact, deformation load, and the like,
An object of the present invention is to provide a compact and easy-to-carry compact disk storage file which can easily take out and store a compact disk and can store a plurality of compact disks without bulk.

[0008]

In order to achieve the above object, a compact disk storage file of the present invention is provided with a polyolefin laminate layer on one side of a paper base material, and further provided with a silicone-based release agent layer thereon. A compact disc is attached to the other side, and multiple sheets of removable adhesive layer are laminated and cut into rectangles, squares, etc. larger than the compact disc, and one piece is adhered together with the front and back covers It is characterized by binding with a stapling agent, stapler or the like.

Printing paper or wrapping paper is used as the paper base material used for the sheet, the weight of the paper is 70 to 200 g / m ² , and drawing paper or coated drawing paper is used for the front and back covers.
Weight of the paper is approximately 200-30Og / ^{m 2.}

[0010] A filler layer is provided on the surface on which the silicone-based release agent layer is formed in order to prevent the penetration of the solvent-type silicone coating solution and to improve the usability by increasing the strength of the sheet. Can be The filling layer is inexpensive as compared with the use of pigments, adhesives, and the like, and the coating process is simple. Therefore, in the present application, a polyolefin resin, for example, a high-pressure low-density polyethylene is used. The thickness of the laminate layer is preferably from 10 to 40 μm.

As the release agent, a general-purpose addition-type or condensation-type silicone release agent is used, but an addition-type silicone release agent having high reactivity is particularly preferably used.

Furthermore, in order to enable writing, the silicone-based release agent contains SiO ₂ units and (CH ₃ ) ₃ SiO.
_1/2 unit or CH ₂ ＣＨCH (CH ₃ ) ₂ SiO
_A silicone resin, which is an organosilicon compound having _1/2 unit, is blended. As the amount of silicone resin used,
It is 30 to 60% by weight based on the silicone release agent. If it is less than 30% by weight, the writing properties are poor, and if it exceeds 60% by weight, the peeling force between the facing sheet and the adhesive layer is high, and it becomes difficult to open the page and the usability deteriorates.

As the weak adhesive, for example, ethylene-propylene-diene terpolymer rubber, butyl rubber, halogenated rubber, liquid polybutene,
Tackifiers such as liquid polyisobutylene, inorganic fillers, pressure-sensitive adhesives consisting of hardeners, pressure-sensitive adhesives in which pressure-sensitive adhesive microspheres and plasticizers are blended with an acrylic pressure-sensitive adhesive, hot-melt pressure-sensitive adhesives mainly composed of styrene-isoprene-styrene copolymer, etc. , And many others.

The adhesive microspheres are made by, for example, suspension polymerization of 95 parts by weight of 2-ethylhexyl acrylate and 5 parts by weight of acrylic acid. These microspheres are mixed with an acrylic emulsion adhesive, or the microspheres are dried. By mixing with an acrylic solvent-based pressure-sensitive adhesive, a weak pressure-sensitive adhesive that can be attached to and detached from a compact disk can be obtained.

Further, by mixing 5 to 20% by weight of a plasticizer and, if desired, 0.1 to 10% by weight of a release agent with an acrylic pressure-sensitive adhesive, it is possible to obtain a low-pressure-sensitive adhesive which can be attached and detached with a compact disk. Can be

In the case of a hot-melt pressure-sensitive adhesive, the amount of the resin is reduced, the amount of a plasticizer such as oil is increased, and a plurality of narrow streaks having a width of 0.5 to 10 mm are formed from the T-die at intervals of 5 to 10 mm. A low pressure-sensitive adhesive layer that can be attached and detached to and from a compact disk is obtained by melt-extruding a paper substrate in parallel at approximately equal intervals.

When the pressure-sensitive adhesive is directly applied to the paper base material and the pressure-sensitive adhesive is impregnated, it is preferable to apply the pressure-sensitive adhesive on the silicone-coated surface and then wind it up. By winding the adhesive, the pressure-sensitive adhesive can be transferred to the opposite surface of the paper base material.

The adhesive strength of the weak adhesive is 20 to 150 g / 2.
0 mm, preferably 50 to 100 g / 20 mm, is good.

The coating amount of the weak adhesive after drying is not particularly limited, but is 5 to 40 g / m ² , preferably 10 to ² g / m ² .
0 g / m ² .

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments 1 and 2 will be described with reference to FIGS. 1 and 2, respectively, concerning a compact disk storage file according to the present invention.

A high-pressure method low-density polyethylene is melt-extruded on one side of a high-quality paper base material for printing having a weight of 125 g / m ² to provide a 20 g / m ² filling layer, and a 1 g / m ² layer thereon.
² was provided with an addition reaction type silicone release agent layer. Thereafter, the fine spherical particles produced by the suspension polymerization were converted to solid contents by 8%.
0% by weight and 20% by weight of acrylic adhesive in terms of solid content
The amount of coating after drying the low-pressure adhesive mixed with
/ M ² on the release agent layer to produce a roll of sheet 3. Then, the sheet 3 was returned winding a raw of the sheet 3 on the Figure drawing paper 205g / m ² for the back cover 2
Four sheets of plain paper are stacked with the weak adhesive layer facing up, and the drawing paper for cover 2 is further stacked on top of it, cut to 15 cm wide by 16 cm, and the ends are fixed with adhesive 4 As a result, a compact disc storage file capable of storing three compact discs in a two-page spread format was created (FIG. 1). Alternatively, the above three sheets 3 are stacked on a 205 g / m ² drawing paper for the front and back cover 2 with the low pressure-sensitive adhesive layer side up, and cut into 15 cm wide and 32 cm wide. Was stapled with stapler 1 and folded in a valley to create a compact disc storage file capable of storing four facing compact discs (FIG. 2).

[0022]

The present invention protects the information recording surface of a compact disc from dust and dirt, protects the compact disc itself from impact, deformation load, etc., and makes it easy to take out and store the compact disc without bulkiness. A compact and convenient compact disk storage file capable of storing a plurality of compact disks was provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing Embodiment 1 of a compact disk storage file of the present invention.

FIG. 2 is a perspective view showing a compact disk storage file according to a second embodiment of the present invention.

FIG. 3 is a plan view showing a compact disk storage file according to a first embodiment of the present invention.

[Explanation of symbols]

 1: Stapler 2: Cover, back cover 3: Sheet 4: Adhesive part

Claims (2)

[Claims] 1. A sheet having a polyolefin laminate layer provided on one side of a paper base material, a silicone-based release agent layer provided thereon, and a weak pressure-sensitive adhesive layer provided with a removable compact disk on the other side. Cut multiple pieces into rectangles, squares, etc. larger than the compact disc,
A compact disc storage file in which one piece is stapled with adhesive, stapler, etc. along with the back cover. 2. The compact disk storage file according to claim 1, wherein the weak pressure-sensitive adhesive layers are provided in a plurality of equidistant and parallel streaks.