JPH0696551A - Magnetic disk cartridge - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a magnetic disk cartridge capable of effectively preventing defects caused by mold, bacteria, etc. in the cartridge. A magnetic disk cartridge having a liner sheet for cleaning a magnetic disk on an inner surface of a cartridge body, wherein the liner sheet contains at least 1% by weight of zeolite containing a metal-based antibacterial and antifungal agent.
It is characterized in that the resin fibers contained above are contained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk cartridge such as a floppy disk cartridge in which a disk-shaped flexible magnetic recording medium is rotatably housed in a cartridge body.

[0002]

2. Description of the Related Art Conventionally, a liner sheet is arranged on the inner surfaces of upper and lower shells constituting a cartridge main body for the purpose of removing dust generated from a magnetic disk and protecting the magnetic disk. In addition, there are some which are provided with an elastic piece called a lifter for helping to remove dust. Further, in order to remove and collect the dust, some liners are impregnated with liquid paraffin or a silicon compound to improve the dust removing ability.

[0003]

However, none of these compounds have an excellent antibacterial and antifungal effect against mold, bacteria and the like generated under a certain condition in the magnetic disk cartridge. Rather, these are the causes of the growth of mold, bacteria, etc., or the factors promoting the growth in the liner sheet. For example, the deterioration of synthetic polymer materials by microorganisms can be roughly classified into three types: fungi, bacteria, and radiation fungi.
Plastics and synthetic rubbers are generally more resistant to microorganisms than natural organic materials. However, even plastics, synthetic rubbers, and the like may undergo discoloration of the surface, deterioration of spots, and fine perforation due to microorganisms. This is usually a thermoplastic resin,
This is because it contains a stabilizer, a lubricant, and other compounding agents, and is therefore easily affected by microorganisms. Especially, the above-mentioned paraffin and other organic substances are likely to become nutrients, and cellulose fibers and polyester fibers are particularly susceptible to microorganisms.

If molds, bacteria, etc. propagate in the magnetic disk cartridge in this manner, it may be difficult to read, write, and track the magnetic recording waveform, which may lead to loss of commercial value. Heretofore, the degree of the influence of such molds and bacteria has not been considered so much. Magnetic recording media such as floppy disks are often used or stored for several years. In particular, those that have been stored and stored for a long period of time, especially those that have been used or preserved in hot and humid areas, often cause complaints about mold, bacteria and the like. Therefore, it is an urgent task to prevent such complaints in advance, and it is an issue to reduce the number of product complaints, to increase the trust of users, and to fulfill the responsibility as a manufacturer. Therefore, it is an object of the present invention to provide a magnetic disk cartridge that can effectively prevent defects caused by mold, bacteria, etc. in the cartridge.

[0005]

DISCLOSURE OF THE INVENTION The present invention is based on the finding that a liner sheet is suitable as a hotbed for the growth of molds, bacteria, etc. in a magnetic disk cartridge. That is, the present invention provides a magnetic disk cartridge having a liner sheet for cleaning a magnetic disk on the inner surface of the cartridge body, wherein the liner sheet contains at least 1% by weight or more of zeolite containing a metal-based antibacterial and antifungal agent. The above object is achieved by providing a magnetic disk cartridge characterized by containing resin fibers contained therein. Here, examples of the metal-based antibacterial and antifungal agent include those containing silver, shell, zinc and the like, and the zeolite preferably has a high specific surface area, and the particle size of the zeolite is several microns or less. Is preferable, and the mixing ratio of the other general fibers (a) and the resin fibers (b) is 99.9 / 0.1 to 0.1 / 99.9 (weight ratio), which can be used in a wide range. , Preferably 20 / 90-9
The range is 0/10.

[0006]

[Operation] On the liner sheet in the cartridge body,
At least 1 zeolite containing a metal-based antibacterial and antifungal agent
When resin fibers containing more than wt% are contained in the magnetic disk cartridge during the manufacturing process or after shipment due to fungi such as mold and bacteria, or spores due to the action of the metal-based antibacterial and antifungal agent. However, the liner sheet does not become a flooring layer for bacteria, mold, etc., and prevents the growth of the liner sheet and prevents magnetic disk defects. Further, zeolite has a high specific surface area and has an excellent ability to retain a metal agent, and when the particle size of the zeolite is made as small as possible, the zeolite is retained on the surface of the spun yarn together with the metal agent, The agent sufficiently exhibits an antibacterial and antifungal action on the spun yarn, that is, on the surface of the resin fiber. Therefore, the ability of the liner sheet to support the antibacterial and antifungal agent and the antibacterial and antifungal action are significantly increased, migration of the antibacterial and antifungal agent itself, which is a problem for the liner sheet, is suppressed, and various magnetic disk The possibility of adversely affecting the characteristics is reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a magnetic disk cartridge according to the present invention will be described below with reference to the drawings. 1 is a perspective view of a magnetic disk cartridge according to the present invention.
FIG. 3 is an inside view showing the inside of the cartridge body of FIG. 1. Figure 1
As shown in FIG. 2 and FIG. 2, the magnetic disk cartridge according to the present invention is provided with the liner sheet 7 for cleaning the magnetic disk 4 on the inner surface of the cartridge body 1, which is the same structure as the conventional magnetic disk cartridge. . Thus, in the magnetic disk cartridge according to the present invention, the liner sheet 7 contains resin fibers containing at least 1% by weight or more of zeolite holding a metal-based antibacterial and antifungal agent.

The magnetic disk cartridge according to the present invention will be further described. The cartridge body 1 is composed of an upper shell 2 and a lower shell 3 in which a magnetic disk 4 is rotatably housed. A window 5 is formed in each of the upper shell 2 and the lower shell 3, and the magnetic disk 4 contacts the head on the device side through the window 5. Further, a slide shutter 6 for opening and closing the window 5 is provided with the shells 2 and 3 interposed therebetween. As shown in FIG. 2, a liner sheet 7 having a substantially donut shape with a window cut out is attached to the inner surface 3A of the lower shell 3, and the surface of the liner sheet 7 serves as a rotation region of the magnetic disk 4. If desired, a lifter 8 is provided at a desired position of the lower shell 3, and the lifter 8 lifts the liner sheet 7 from the inner surface 3A of the lower shell. The liner sheet 7 configured in this manner efficiently removes dust from the magnetic disk 4, and the liner sheet 7 is manufactured as follows.

The liner sheet 7 may be generally a non-woven fabric, a woven fabric, or a film or the like may be cut and used, but a non-woven fabric is preferably used. Liner sheet 7
As described above, the material of (1) is composed of zeolite-containing resin fibers containing zeolite and general fibers. The zeolite in the zeolite-containing resin fiber may be mixed with the monomer before polymerization or immediately before injection molding for spinning, but mixing at the time of raw material monomer is preferable in terms of dispersion of the zeolite. The content of zeolite is 1% by weight or more, especially 1
The content is preferably in the range of 10% by weight to 10% by weight, and if the content is within this range, no problems occur in the spinning method,
Further, the antibacterial and antifungal action of zeolite can be exhibited in the resin fiber. The spinning method of the resin can be based on a conventionally known method and is not particularly limited, but in the present invention, a porous hollow fiber having a high surface area such as a hollow fiber is used instead of a simple spinning method. Is preferably a resin fiber.

Zeolite may be natural or artificial
Good, but in the present invention, Si0 ₂/ Al₂O₃Is 1
It is preferably 4 or less. Also the specific surface of zeolite
It is desirable to have a high product, especially the specific surface area is 150m.²/
It is desirable that it is g or more, and the particle size of Zeoli will be
It is desirable that the size is as small as possible, especially on the order of several μm or less.
Good This is because the specific surface area of zeolite is large and the particles are
If it is small, it will retain the antibacterial and antifungal agent well and will be added to the fiber.
This is because they can be dispersed uniformly. For this reason,
On the surface of the fiber, it exerts a sufficient antibacterial and antifungal effect, and
The effect of can be fully sustained. To zeolite
The contained antibacterial and antifungal agent is a metal with antibacterial and antifungal action.
There are, for example, silver, copper, zinc and the like. these
Metal-based antibacterial and antifungal agents should be used at least for zeolite.
It is desirable that the content is 1 wt% or more.
Use of the above zeolites is sufficient for liner 7.
Antibacterial and antifungal action is imparted.

The other general fiber (a) which can be used by mixing with the resin fiber (b) containing the above zeolite is
The mixing ratio (a) / (b) is 99.9 / 0.1-0.1
/99.9 (weight ratio), preferably 20/90 to 90 /
The range is 10. As the general fiber, a conventionally known synthetic fiber can be adopted, and examples thereof include a polyester synthetic fiber, a polyamide synthetic fiber, a polyacrylic fiber, a polypropylene fiber, cellulose and other known resin fibers. Can be used alone or as a mixture thereof. Liquid paraffin or a silicon compound may be applied to the liner sheet in order to enhance the removal of dust and the like.

In the magnetic disk cartridge constructed as described above, the liner sheet 7 exhibits a sufficient antibacterial and antifungal effect, as will be apparent from the evaluations described later. Therefore, fungi such as mold and bacteria or spores do not proliferate, and there is no risk of causing read / write defects of the magnetic disk during the manufacturing process or after shipping. For example, when the magnetic disk cartridge is used or stored for several years, it does not cause defects such as mold and bacteria even if used or stored in a hot and humid area. It is possible to reduce or even increase user trust.

Although the liner sheet 7 is attached to the lower shell 3 in the above embodiment, the present invention is not limited to this. The liner sheet 7 may be attached to the upper shell 2 or both.

Next, various liner sheets were prepared based on the above-mentioned examples, and their antibacterial and antifungal effects were evaluated together with comparative examples. The present invention is not limited to the following examples. -Example 1 Average particle diameter 5-6 micrometers, specific surface area 500-600m < ² > /
g, SiO ₂ / Al ₂ O ₃ molar ratio is about 2, and 3% by weight of silver and 5% by weight of copper are imparted by ion exchange to form A-type zeolite (trade name: BACTEKILLER A350BN, manufactured by Shinanen New Ceramic Co., Ltd.) Was used to form a porous hollow fiber into a resin fiber. The resin fiber and the polyester fiber were mixed at a ratio of 40/60 to produce a non-woven fabric, which was used as a liner material and used in the cartridge body.

Example 2 40/60 resin fibers and nylon fibers similar to those in Example 1 were used.
The non-woven fabric was manufactured by mixing the mixture in the ratio of 1. and was used as a liner material for the cartridge body. Example 3 40/60 resin fibers and rayon fibers similar to those in Example 1 were used.
The non-woven fabric was manufactured by mixing the mixture in the ratio of 1. and was used as a liner material for the cartridge body.

Comparative Example 1 A non-woven fabric was produced only from polyester fibers, which was used as a liner material and used in a cartridge body. Comparative Example 2 Nylon fibers and rayon fibers were mixed at a ratio of 50/50 to produce a nonwoven fabric, which was used as a liner material.
Used for the cartridge body. These non-woven fabrics (7 cm x
Cut into 7 cm, 10 sheets were prepared), inoculate with various mold spore suspensions, place on a commercial GPLP agar medium, and 30 ° C.
After static culture for 7 days, the number of grown mold colonies was counted. The results are shown in Table 1. * Mold type Aspergillus niger Aspergillus flavus Penicillium citrinum Dhaetomium glibosum Cladosporrium herbarium
um) Cladosporium)
(Cladosporrium cladpsporoides).

[0017]

[Table 1]

[0018]

The magnetic disk cartridge according to the present invention can effectively prevent defects caused by mold, bacteria, etc. in the cartridge.

[Brief description of drawings]

FIG. 1 is a perspective view of a magnetic disk cartridge according to the present invention.

FIG. 2 is an inner view showing the inside of the cartridge body of FIG.

[Explanation of symbols]

 1 Cartridge body 2 Upper shell 3 Lower shell 4 Magnetic disk 7 Liner sheet

Claims (1)

[Claims] 1. A magnetic disk cartridge having a liner sheet for cleaning a magnetic disk on an inner surface of a cartridge body, wherein the liner sheet contains at least 1% by weight or more of zeolite carrying a metal-based antibacterial and antifungal agent. A magnetic disk cartridge characterized by containing a resin fiber that