JPH07161074A - Stuck structure of information recording optical disk - Google Patents

Abstract

PURPOSE:To obtain an optical disk so considered that different users can handle the disk without anxiety. CONSTITUTION:An adhesive used for sticking disks or the material of protective films is blended with fine particles having antibacterial and antimold function based on SiO.Al2O3.ZnO.Liq2O.Ag<+> so as to prevent the generation of various bacteria. In this way many unspecified users can utilize the resulting disk without anxiety.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for laminating optical discs capable of optically recording information.

[0002]

2. Description of the Related Art Conventional optical discs are typified by a reproducible disc and a compact disc that are laminated on both sides as described in "Points of optical disc process technology" (published by S60.3.15, Japan Industrial Center). There is a single plate type disc.

[0003]

In the disk structure according to the above-mentioned prior art, industrial restrictions have arisen when a large number of disks that meet new needs are provided at low cost.

For example, in a laser disk or the like using a high-reflectance material such as aluminum on the surface of a substrate material made of acrylic resin, most users handle the disk with bare hands, and as a result, the disk is Bacteria were likely to be generated on the end face.

The object of the present invention is to solve the drawbacks of the conventional structures,
It is to provide an inexpensive disk structure.

[0006]

The [Summary of the present invention, among the laminated disk structure, the protective film material or the adhesive material, _{Anakin, SiO · AI 2 O 3 ·} ZnO with excellent anti-fungal properties
It was realized by kneading an inorganic gel containing Li ₂ O · Ag + as a main component and effectively pasting it together.

In particular, a protective film made of a photo-curable polymer material containing the inorganic gel is used on the recordable thin film, and a thermoplastic polymer material is also used for protection on the aluminum thin film formation surface. It was a film.

[0008]

[Function] SiO / AI ₂ O ₃ having excellent antifungal and antifungal properties
-Ag + ions contained in the inorganic gel mainly composed of ZnO / Li ₂ O / Ag + have a function of suppressing the generation of bacteria such as black mold and blue mold.

[0009]

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

FIG. 1 shows an optical disk 1 to which the present invention is applied.
1 is a partial cross-sectional view showing an embodiment, 1-1 and 1-2 are transparent substrates made of acrylic resin on which information recording tracks and the like are formed, and 2-1 and 2-2 are aluminum and the like having a light reflecting function. Metal thin films 3-1, 3-2 are protective films made of low melting point resin such as paraffin wax,
Reference numeral 4 is an adhesive used to join the two opposite surfaces.

Here, the resin substrate 1-1 is transfer-formed by injection molding with information recording pits having a track pitch of 1.6 μm, and an aluminum thin film having a laser beam reflecting function is formed on this pit forming surface by a vacuum deposition method. To do.

The other opposing surface 1-2 is formed in the same manner as 1-1, and has a melting point of about 90 for the purpose of protecting this thin film.
Paraffin wax at ℃ was applied and formed by a roll coater.

As a first embodiment of the present invention, a hot melt adhesive containing styrene-butadiene-styrene (SBS) rubber as a main component is used to bond the faces 1-1 and 1-2 together. SiO ・ AI ₂ O ₃・ ZnO ・ L
A disk adhesive was prepared by mixing 0.03 wt% of fine particles having antifungal and antifungal functions, which are mainly composed of i ₂ O · Ag +.

The 1/8 divided pieces of the disk thus obtained and a conventional disk piece containing no antibacterial and antifungal fine particles were placed in an incubator containing agar in a petri dish, and the temperature was 37 ° C.
When kept in the atmosphere for 24 hours, the generation of black bacteria was clearly observed around the agar contact surface of the conventional disk, but the tendency was not observed in the incubator for the disk of the present invention.

Similarly, the fine particles of 0.05, 0.1 w
When a sample containing t% was prepared and subjected to a culture test, no germs were found even after one month.

As a second embodiment, as a protective film material for a metal thin film used for a disc, the antibacterial and antifungal fine particles were kneaded in paraffin wax in the same manner as in Example 1 to form a protective film material. When the surfaces 1-1 and 1-2 using this were pasted together with a conventional adhesive and a culture test was conducted, the same effect as in Example 1 was obtained.

As the optical disc, there is a compact disc having a polycarbonate substrate as well as a laser disc having an acrylic material as a substrate.

In this case, a UV curable resin based on a polyfunctional acrylic monomer is used as a protective film material for the aluminum reflective film, and this resin also contains about 0.05 wt% of antibacterial and antifungal fine particles. When a disk was trial-produced by using a mixture containing the above and a culture test was conducted, no generation of bacteria was observed even after 1 month.

[0019]

As described above, the optical disk according to the present invention has the following effects. In general, an unspecified number of users unknowingly touch the disk with bare hands, and it cannot be said that the optical disk is hygienic.

However, the disk structure according to the present invention has an effect that the customer can use the disk with peace of mind.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of an optical disc to which the present invention is applied.

[Explanation of symbols]

1-1, 1-2 ... Acrylic resin substrate for forming light reflection film, 2-1, 2-2 ... Metal thin film such as aluminum, 3
-1, 3-2 ... Thermoplastic resin protective film such as paraffin wax, 4 ... Adhesive.

Claims (2)

[Claims] 1. A layered structure of an optical disk capable of recording information, containing 0.01 wt of antibacterial and antifungal inorganic gel.
% To 0.15 wt%, an optical disk laminating structure characterized by being bonded with an adhesive hot melt adhesive. 2. The protective film material according to claim 1, which protects a thin film material surface or a light reflecting surface on which optical information can be recorded, for example,
It is characterized in that a protective film is formed from a polymer material containing 0.01 wt% to 0.15 wt% of the antibacterial and antifungal inorganic gel in paraffin wax and an ultraviolet curable resin, and then bonded by an adhesive. Structure for laminating optical disks.