JPH0196887A - Recording cartridge - Google Patents

Abstract

PURPOSE:To effectively prevent a recording medium from being corroded according to the entry of a harmful material in an air and a recording characteristic from being deteriorated by disposing a fine grain entry preventing member in a metal recording material stored recording cartridge. CONSTITUTION:The magnetic tape 5 made of non-magnetic metal recording material having a surface on which a magnetic layer is disposed is stored in a cartridge case main body formed of upper and lower cases 1a, 1b. The front and the rear faces of the tape 5 guided out through a drawing out port from a reel 4 are respectively provided with a front cover 2 and a rear cover 7 and at the time of using no tape 5, the tape 5 is held by a sheet form preventing material 11 inserted and bonded between the cover 2 and the inclined wall 6 of the cover 7 to prevent the entry of the fine grains in the air. Thereby, the corrosion of the recording medium and the deterioration of the recording characteristic due to the entry of the harmful material in the air can be effective ly prevented.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a recording cartridge such as a magnetic tape cartridge, a magnetic disk cartridge, or an optical-magnetic disk cartridge, and particularly to a recording cartridge using a metal recording material. It is related to.

[Conventional technology]

On non-magnetic substrates such as plastic films.

For example, iron, cobalt, cobalt-nickel, cobalt-
A magnetic recording medium in which a magnetic layer made of a metal material such as phosphorus is formed has excellent high-density recording characteristics, but on the other hand, it has the problem that the magnetic layer is corroded and the magnetic characteristics deteriorate.

In this regard, various rust prevention treatments have been proposed in the past, such as by incorporating various rust preventive agents into magnetic recording media.

[Problem that the invention seeks to solve]

However, simply applying anti-rust treatment is still insufficient to prevent corrosion. This is because atmospheric substances harmful to the magnetic recording medium enter the cartridge case through gaps and openings provided in the cartridge case and adhere to the magnetic recording medium. In fact, corrosive components are noticeably attached to the portion of the magnetic tape led out to the front side of the case of the magnetic tape cartridge. In particular, it has been confirmed that the corrosion of recording media is significant in, for example, vapor-deposited tapes that do not use a binder.

Such harmful substances in the atmosphere include suspended particles of sulfur, chlorine, and various compounds containing these.

Examples include mist-like substances such as sulfuric acid and nitric acid.

In the specification of the present invention, these particles are referred to as floating particles in the atmosphere that corrode the recording medium.

An object of the present invention is to provide a recording cartridge that can effectively prevent the recording medium from corroding due to the intrusion of harmful substances in the atmosphere and deteriorating recording characteristics when the recording medium is installed in a cartridge case. It is in.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention is directed to a recording cartridge in which a recording medium using a metal recording material is housed in a cartridge case, such as a magnetic tape cartridge using vapor-deposited tape. be.

A particle intrusion prevention member, such as a filter, which prevents floating particles in the atmosphere that corrode the recording material from entering the cartridge case, is installed between the front cover and the rear cover, for example. It is characterized by being provided in the part of the cartridge case where floating particles enter.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an 8m video magnetic tape cartridge according to the first embodiment, FIG. 2 is an enlarged sectional view of the main part of the magnetic tape cartridge, and FIG. 3 is an enlarged sectional view of the magnetic tape used in the magnetic tape cartridge. It is a diagram.

Cartridge case C includes upper case 1a and lower case 1b.
It consists of a case body 1, a front lid 2, and a rear lid 3. Two tape reels 4.4 are rotatably housed within the case body 1.
A magnetic tape 5 is wound around the case body 1, and a part of the magnetic tape 5 is led out to the front side from a tape outlet formed on the front side of the case body 1. As shown in FIG. 2, when the magnetic tape cartridge is not in use, the front side of the lead-out portion of the magnetic tape 5 is protected by the front cover 2, and the rear side is protected by the rear cover 3.

This magnetic tape 2 has a non-magnetic base 1 as shown in FIG.
A magnetic WJ 12 made of a metal magnetic material is formed on the non-magnetic substrate 14 , and a back coat layer 13 is provided on the lower surface of the non-magnetic substrate 14 .

As the non-magnetic substrate 14, for example, polyethylene terephthalate film, polyimide film, polysulfone film, etc. are used.

Examples of the metal magnetic material include simple metals such as Fe and Go, or Go-Ni, Co-CrCo-P, and Go.
-Ni-P, Go-Ni-Fe, Co-Ni-Cr, C
o-Fe, Co-Fe-Cr, Go-Fe-Ni, Co
-Alloys such as Ti and Co-Cu are used. magnetic layer 1
Examples of the forming means of 2 include vapor deposition, sputtering,
Examples include a CVD method, an ion blating method, and a coating method using a binder, and the present invention is particularly effective in forming a magnetic layer without using a binder. Note that a protective layer can also be formed on the magnetic layer 12 using a lubricant or rust preventive agent as described later.

As the back coat material, one containing a lubricant or rust preventive agent as described below can be used.

As shown in FIG. 2, the rear cover 3 has an inclined wall 6 that covers the rear side of the magnetic tape 5, and an upper wall 7 provided horizontally at the upper end of the inclined wall 6. Pins 8 are installed on the left and right sides of the inclined wall 6.
is integrally provided, and its tip is slidably inserted into a substantially S-shaped guide groove 9 formed in the case body 1.

A sheet-like suspended particulate infiltration prevention material 11 is attached to the inner surface of the vertical wall 10 of the front lid 2 and the front surface of the inclined wall 6 of the rear lid 3. When the magnetic tape cartridge is not in use, the blocking material 11.11 directly contacts the entire front surface (magnetic layer 12) and a part of the rear surface (back coat layer 13) of the magnetic tape 5, thereby blocking at least the lower end of the magnetic tape 5. The sides are protected in a sandwich-like and elastic manner by blocking elements 11.11.

The blocking material 11 prevents floating particles such as various compounds containing sulfur and chlorine, or mist of sulfuric acid and nitric acid, which corrode the metal magnetic material of the magnetic tape 5, from entering the cartridge case C. It has a function. Examples of the blocking material 11 include a filter, an elastic sheet, a sponge-like molded body, leather, a nonwoven fabric, and an elastic coating film.

Examples of fibers used in the blocking material 11 include vegetable fibers such as cotton and cotton, animal fibers such as wool, recycled fibers such as viscose rayon, semi-synthetic fibers such as acetate, inorganic fibers such as carbon fiber, polyamide and polyvinyl. There are synthetic fibers such as alcohol.

Moreover, as an elastic body used for the blocking material 11.

Examples include diene rubber such as styrene-butadiene, olefin rubber such as butyl rubber, silicone rubber, urethane rubber, polystyrene, polyvinyl chloride, polyethylene, polypropylene, and polyamide.

Furthermore, as the blocking material 11, a sheet in which activated carbon particles are dispersed and held, a felt made of activated carbon fibers alone or mixed with other fibers, cloth, paper, etc. are suitably used. The former sheet in which activated carbon particles are dispersed and held can be made of, for example, polyether urethane foam, polyester urethane foam, nonwoven fabric, paper, plastic foam, etc. as a base material, and activated carbon particles such as coconut shell activated carbon are impregnated and adhered to the base material. There is something I did.

The content of the activated carbon particles is approximately 20 to 70% by weight, and the physical properties of the powdered activated carbon used are as shown in Table 1 below.

Table 1 The activated carbon fiber used in the latter has physical properties as shown in Table 2 below.

Table 2 The blocking material 11 can be impregnated with and retained a rust preventive agent.

Examples of the rust preventive include 2-pentylaminobenzimidazole, 2-mercaptobenzothiazole, sorbitan monopalmitate, 5-methylbenzotriazole, 2-nitroso-1-naphthol, ferricyanide salt, ferrocyanide salt, etc. is preferably used, but other rust inhibitors can also be used.

Further, the blocking material 11 may be impregnated with a lubricant and held therein together with or alone with the rust preventive agent. As this lubricant, for example, aliphatic compounds, fluorine compounds, silicone compounds, or hydrocarbon compounds are preferably used.

As the aliphatic lubricant, for example, fatty acids, metal salts of fatty acids, fatty acid esters, fatty acid amides, fatty acid alcohols, etc. are used.

Examples of the fluorocarbon lubricant used include trichlorofluoroethylene, perfluoropolyether, perfluoroalkyl polyether, and perfluoroalkylcarboxylic acid. These commercially available products include, for example, Diflon #20 manufactured by Daikin Industries, Ltd., Krytx M, Krytx H, and Pydax A manufactured by DuPont.
R, Huonbrin Z manufactured by Montegisson, etc.

As the silicone lubricant, for example, silicone oil, modified silicone oil, etc. are used. - As the hydrocarbon lubricant, paraffin, squalane, wax, etc. are used, for example.

FIG. 4 is a sectional view of a main part for explaining a second embodiment of the present invention. In the case of this embodiment, the blocking material 11 is provided only on the inclined wall 6 of the rear cover 3, and when the magnetic tape cartridge is not in use, as shown in the figure, the blocking material 11 is provided only on the inclined wall 6 of the rear cover 3. The part is the blocking material 11
Since it is sandwiched between the front cover 2 and the vertical wall 10 of the front cover 2, floating particles in the atmosphere do not get around to the magnetic tape 12 side of the magnetic tape 5 and become attached thereto.

FIG. 5 is a sectional view of a main part for explaining a third embodiment of the present invention. In this embodiment, the rear M is located at the lower end of the front cover 2.
A blocking material 11 is fixed to the surface in contact with the magnetic tape cartridge 6 to prevent airborne particulates from entering the inside from between the front rim 2 and the rear lid 3 when the magnetic tape cartridge is not in use.

FIG. 6 is a sectional view of a main part for explaining a fourth embodiment of the present invention. In the case of this embodiment, as shown in the figure, a top portion 15. Or the upper wall 7 of the rear cover 3
A blocking material 11 is fixed to the lower surface facing the top portion 15. And when the magnetic tape cartridge is not used,
Airborne particulates in the atmosphere are prevented from entering the interior from between the upper wall 7 and the top 15.

In addition to the embodiments described above, for example, a combination of the first embodiment (see FIG. 2) and the fourth embodiment (see FIG. 6), a combination of the second embodiment (see FIG. 4) and the fourth embodiment, etc. A combination with the example (see FIG. 6), a combination of the third embodiment (see FIG. 5) and the fourth embodiment (see FIG. 6), etc. are also possible.

FIG. 7 and FIG. 8 are a perspective view and a sectional view of essential parts for explaining a magnetic disk cartridge according to a fifth embodiment of the present invention. In the case of this embodiment, the cartridge case C is composed of an upper case 20a and a lower case 20b as shown in the figure, and a head insertion opening 21 and a drive opening 22 are formed at predetermined positions as shown in FIG. has been done.

A magnetic disk 23 is rotatably housed inside the cartridge case C, and the inner peripheral portion of the magnetic disk 23 is held between a pair of upper and lower hubs 24 . As shown in FIG. 8, cleaning sheets 25 are adhered to the inner surfaces of the upper case 20a and the lower case 20b.

Furthermore, the magnetic disk 23 is lightly and elastically held in openings where airborne particulates enter, such as around the head insertion port 21 and the drive opening 22 on the inner surfaces of the upper case 20a and the lower case 20b. Annular blocking material 2
6 is fixed.

This blocking material 26 is made of the above-mentioned material,
Contains a rust preventive and/or lubricant as required.

In this embodiment, the case of a magnetic disk cartridge was explained. For example, Gd-Go, Tb-Fe, Tb7
Fe-Co, Gd-Tb-Fe, Tb-Dy-
The present invention can also be applied to a magnetization reversal type optical disk having a recording layer of Fe or the like.

〔Effect of the invention〕

In the structure of the first example, an 8 m video magnetic tape cartridge was assembled using a cloth filter made of cotton fiber (manufactured by Asahi Kasei Co., Ltd., product name: Benkotsuto) as a blocking material for floating particulates. This magnetic tape cartridge was left on a busy road for 30 days to perform a field test, and the results are shown in Figures 9 to 11 below.

Figure 9 is a microscopic photograph of the fiber surface of the blocking material before the test, Figure 10 is a microscopic photograph of the fiber surface after the test, and Figure 11 is the state of the vapor-deposited tape surface after the test. FIG.

FIG. 12 is a micrograph showing the state of the vapor-deposited tape surface after a field test was conducted on a conventional magnetic tape cartridge under the same conditions.

As shown in Figure 9, nothing adhered to the fiber surface before the test, but after the test, when the suspended particulate infiltration prevention material was applied [6], as shown in Figure 10, fine particles (white Particulate matter) A was attached or adsorbed, while the surface condition of the vapor-deposited tape was almost unchanged from before the test.

Figure 12 shows a conventional product that is not provided with a suspended particulate infiltration prevention material, but after a field test, floating particulates A adhered to the surface of the vaporized tape, and corrosion products B (white layered areas) are recognized. As is clear from comparing FIG. 11 and FIG. 12, the device of the present invention effectively prevents floating particles in the atmosphere that corrode recording materials from entering the cartridge case.
Recording disker with excellent corrosion resistance and long service life 1-
Ridge can be provided.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a magnetic tape cartridge according to a first embodiment of the present invention, FIG. 2 is an enlarged sectional view of the main part of the magnetic tape cartridge, and FIG. 3 is an enlarged view of the magnetic tape used in the magnetic tape cartridge. FIG. 4, 5, and 6 are enlarged sectional views of main parts of magnetic tape cartridges according to second, third, and fourth embodiments of the present invention. FIG. 7 and FIG. 8 are a perspective view and an enlarged sectional view of essential parts of a magnetic disk cartridge according to a fifth embodiment of the present invention. 9 and 10 are micrographs of the fine woven surface of the suspended particulate intrusion prevention material according to the first embodiment of the present invention before and after the field test, and FIGS. 11 and 12 are the It is a micrograph showing the state of particles in the vicinity of the surface of a vapor-deposited tape and a conventional vapor-deposited tape after a field test. 1...Case body, 1a...Upper case, 1b...Lower case, 2...Front lid, 3
... Rear cover, 5 ... Magnetic tape, 6 ...
... Inclined wall, 10 ... Vertical wall, 11 ... Suspended particulate infiltration prevention material, 12 ... Magnetic layer, 14 ...
...Nonmagnetic substrate, 15...Top, 16.17-
... Inclined part, 20a ... Upper case, 20b ...
...Lower case, 21...Head insertion slot, 2
2... Drive opening, 23... Magnetic disk, 26... Suspended particulate infiltration prevention material, C...
...Cartridge case. Agent Patent Attorney Kenji Takeshi Figure 2/4 13 Ta-Oka 9 Figure Cut IO1 Up; Figure 1/

Claims (18)

[Claims] (1) In a recording cartridge in which a recording medium using a metal recording material is housed in a cartridge case, prevention of particulate intrusion that prevents floating particulates in the atmosphere that corrode the recording material from entering the cartridge case. A recording cartridge characterized in that a material is provided in a part of the cartridge case where floating particles enter. (2) A recording cartridge according to claim (1), wherein the metal recording material is a metal magnetic material. (3) A recording cartridge according to claim (1), wherein the recording medium is a tape-shaped recording medium. (4) A recording cartridge according to claim (1), wherein the recording medium is a disk-shaped recording medium. (5) A recording cartridge as set forth in claim (1), wherein the particulate intrusion preventing material is a filter. (6) A recording cartridge according to claim (1), wherein the particulate infiltration prevention material is an elastic sheet. (7) A recording cartridge according to claim (5), wherein the filter is composed of an aggregate of fibers. (8) The recording cartridge according to claim (5), wherein the filter disperses and retains activated carbon particles. (9) A recording cartridge according to claim (5), wherein the filter contains activated carbon fibers. (10) The recording cartridge according to claim (6), wherein the elastic sheet disperses and holds activated carbon particles. (11) A recording cartridge according to claim (3), wherein the recording medium has a recording layer that does not contain a binder. (12) The recording cartridge according to claim (1), wherein the blocking material contains a rust preventive agent. (13) A recording cartridge according to claim (1) or (12), wherein the blocking material contains a lubricant. (14) In claim (3), the cartridge case is composed of a case body, a front cover, and a rear cover, and a part of the tape-shaped recording medium housed in the case body is provided in the case body. A recording cartridge, characterized in that the recording cartridge is led out from a tape outlet of a main body and placed in a space formed by the front cover and the rear cover. (15) A recording cartridge as set forth in claim (14), characterized in that a suspended particulate infiltration prevention material is interposed at the joint between the front lid and the rear lid. (16) In claim (14), a suspended particulate infiltration prevention material is fixed to the inner surface of the front lid and the inner surface of the rear lid, and the tape-shaped recording medium is held in a sandwich shape by both prevention materials. A recording cartridge characterized by being sandwiched. (17) Claim (14), characterized in that the recording layer of the recording medium is brought into close contact with the vertical wall of the front lid by a suspended particulate infiltration prevention material fixed to the inner surface of the rear lid. A recording cartridge. (18) In claim (4), the cartridge case has a head insertion port and a drive opening, a disk-shaped recording medium is rotatably housed in the cartridge case, and the cartridge case has an inner surface. A recording cartridge, characterized in that a ring-shaped floating particle blocking material is fixed so as to surround at least the periphery of the head insertion opening, and an end surface of the blocking material is in contact with the surface of the recording medium.