JPS6079098A - Cleaning solution - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a cleaning liquid, and more particularly to a formulation of a cleaning liquid consisting of a 1a solvent used for cleaning the sliding part of a magnetic recording body of a main device for magnetic recording. .

[Prior Art] A cleaning liquid as described above is used in a cheap coater or a magnetic recording + IrIr differential device such as a magnetic disk device to clean the sliding parts of a magnetic recording medium such as a magnetic tape or a magnetic disk. There is. For tape recorders, the sliding parts to be cleaned are tape kites,
Capstans, pinch rollers, magnetic heads, etc., and in magnetic disk drives, they are mainly the sliding surfaces of magnetic heads that come into contact with the medium.

Due to sliding, magnetic powder, binder, etc. of the magnetic recording medium may peel off and adhere to these sliding parts, and dirt and dust in the air may stick to them, resulting in dirt. If left untreated, this dirt deteriorates the contact between the magnetic head and the magnetic recording medium, impairs smooth running of the medium, and significantly impairs recording and reproducing characteristics. Therefore, it is necessary to periodically clean this dirt with a cotton swab or the like soaked in cleaning liquid, but conventional cleaning liquids have the following drawbacks.

In other words, conventional cleaning liquids are mainly composed of organic solvents with the addition of fragrances and coloring agents, and because they remove the aforementioned stains only with the cleaning power of the organic solvents, good effects can be obtained immediately after cleaning. However, the effect does not last long. Furthermore, since cleaning with conventional cleaning liquid exposes the sliding parts covered with dirt, this may actually increase the wear area of the sliding parts and shorten its lifespan.

[[Objective 1] The present invention has been made in view of the following point -1-, and provides a cleaning liquid that can maintain a cleaning effect over a long period of time and can prevent wear of magnetic recording media. The 1-1 objective is to provide the following.

[Example] FIGS. 1 and 2 illustrate locations that need to be cleaned in a magnetic recording/reproducing device.

Figure 1 particularly shows the sliding part of the magnetic tape of the cheap recorder. It is driven by a pinch roller 4 that presses against the roller 3, and is caused to travel rightward in the figure. At this time, the magnetic tape 1 is guided by the tape kite 5 and the capstan 3, slides on the initial movement surface of the magnetic head 2, and is used to transmit magnetic information between the magnetic head 1-2 and the magnetic tape 1. be exposed.

Further, in a magnetic disk drive, a magnetic head as shown in FIG. 2 slides on a magnetic disk, thereby transmitting magnetic information.

The one shown in Fig. 2 is a so-called button head 6 that is often used in magnetic dessert devices, and includes a magnetic core 8 having a magnetic gap, and a magnetic core 8 that holds the magnetic core 8 and slides with the magnetic disk to maintain contact. It has a slider 7.

In the apparatus exemplified in Part 1, magnetic powder, binder, dust, etc. are deposited on the sliding surface of each member that slides on the magnetic tape or magnetic disk in accordance with magnetic recording and reproduction.
Since dirt such as dust sticks to the surface, this dirt can be cleaned by soaking a cotton swab or the like in the cleaning liquid of the present invention, which will be described later, and wiping it off.

The present invention aims to maintain the cleaning effect over a long period of time by adding an organic oil to an organic solvent to form a cleaning liquid. The cleaning liquid of the present invention uses an organic solvent to dissolve and remove dirt adhering to the cleaning area, and the organic oil remaining after cleaning has a lubricating effect to prevent magnetic powder from peeling off from a magnetic recording medium. cormorant.

Select the organic solvent that does not have a negative effect on the properties and life of the cleaning part, and the organic oil to be added depending on the type of magnetic recording/reproducing device and magnetic recording medium to be used.
Select the appropriate one depending on the binder and additives.

Furthermore, consider the f+ performance of organic solvents for cleaning.

It is preferable to use one that evaporates in a short time even at room temperature, and 41
Considering the later lubricity, the addition ratio of machine oil is set so that it remains in the coated area at a thickness of several tens of angstroms to several microns after coating.

Furthermore, for commercialization or identification purposes, it may be colored or an aromatic agent may be added.

Next, detailed examples will be described.

FIG. 3 is a diagram showing the deterioration of the ν property at frequency 4 when a continuous tape running experiment was conducted using the cleaning liquid of the present invention using the cheap coater shown in FIG.
The figure is a diagram showing the wear amount of the magnetic core of 1/H during the same experiment.

The cleaning liquid of the present invention used in this experiment was prepared by adding 0.5% by weight of silicone oil as an organic oil to Freon as an organic solvent. The results of frequency characteristic deterioration and magnetic core wear amount when using this cleaning liquid are shown by symbol A in FIG. 3 and FIG. 4.

Further, for comparison, a cleaning liquid consisting only of Freon was used as a conventional cleaning liquid consisting only of an organic solvent. The result in this case is indicated by the symbol B.

Furthermore, we also conducted a running experiment without cleaning at all. This result is indicated by the symbol C.

The tape recorder used was a compact cassette tape (
45 minutes one way), the temperature is 40
'C! The experiment was conducted under conditions of humidity and RH of 70%. Cleaning was carried out in the same manner as in the past, using the cleaning liquid listed in L every 20 hours of continuous running. Further, the frequency characteristics and the magnetic core wear area were measured after 100 hours as shown in the figure.

As for the frequency characteristics, the amount of attenuation at 10KH2 is measured for a frequency of 315Hz.

In the cleaning liquid of this embodiment, even if the freon evaporates after cleaning, a thin layer of silicone oil remains on the magnetic tape guiding surface, which produces a lubricating effect.
The contact of the magnetic tape is ensured, and the peeled magnetic powder is
Prevents stains caused by pinta, dust, and garbage 11-
be done. As a result, 500
Even with the passage of time, the frequency characteristic deterioration remains at 2 dB or less.

This is a deterioration of 1/4 or less compared to the case (C) in which no cleaning is performed at all. Moreover, the deterioration of the frequency characteristics is less than in the case (B) when the conventional cleaning liquid is used.

Next, when we investigated the wear of the magnetic core, we found that the amount of wear decreased in the following order: when conventional cleaning liquid was used (B), when no cleaning was performed (C), and when the cleaning liquid of the present invention was used. , the wear of the magnetic core can be significantly reduced by the cleaning liquid of the present invention.

It should be noted here that the conventional cleaning liquid shows worse results in terms of wear amount than when no cleaning is performed at all. This is because when cleaning is not performed (C), the aforementioned dirt acts as a protective layer against wear. This clearly shows the superiority of the cleaning liquid of the present invention over conventional cleaning liquids. That is, in the cleaning liquid of the present invention, the residual organic oil has a lubricating effect, so that magnetic recording l'! The contact with the body is improved, and the amount of wear on the sliding part with the magnetic recording medium is reduced.

In the above example, a continuous tape running experiment was shown using the cleaning liquid of the present invention in a tape recorder, but it goes without saying that similar effects can be expected in magnetic recording/reproducing devices using other magnetic recording media. . Furthermore, in the above embodiments, Freon was used as the organic solvent and silicone oil was used as the organic oil, but it goes without saying that other organic solvents and organic oils may be used.

Examples of the organic solvent include aromatic hydrocarbons; chlorinated aromatic hydrocarbons: chlorinated aliphatic hydrocarbons such as methane, ethane, and ethylene derivatives; alcohols: esters; ethers; ketones ; Glycol derivative (
cellosolves): alicyclic hydrocarbons; aliphatic hydrocarbons; mixtures of aliphatic or aromatic hydrocarbons; fluorochloro-substituted hydrocarbons; other cresol+-sulfides)
Father element, N, N-dimethylformaldehyde etc. - J to 4
It is better to use a solvent that is recognized as a single solvent.

In addition, as organic oils, metal soaps consisting of metals 1j and ^ of higher fatty acids: esters of higher fatty acids: higher alcohols; amines; silicone oils: fatty acid amides, and other generally recognized organic oils may be used. .

It goes without saying that the organic solvents and oils listed above are not limited to one type, and a plurality of them may be used in combination.

[Effect] As is clear from the explanation below, according to Kibori 1,
Since the cleaning liquid is made by adding organic oil to an organic solvent, we provide an excellent cleaning liquid that maintains its cleaning effect over a long period of time and can reduce the amount of wear on the sliding surface of magnetic recording media. can do.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram illustrating the structure of a magnetic tape guiding portion of a tape recorder as an example of a magnetic recording 11 production device;
The figure is a schematic diagram illustrating the structure of a magnetic head on which a magnetic disk slides in a magnetic disk device, and FIGS. 3 and 4 are diagrams illustrating the cleaning effect of the cleaning liquid of the present invention. l...Magnetic tape 2...Magnetic head 3...Capstan 4...Pinch roller 5...Tape guide 6...Magnetic head 7...Slider 8...Magnetic core 4ν fraud Luo 1 person, Canon Dunr Co., Ltd.'s 1st generation press person,
/? Rito Kato Procedural Amendment (Originally filed on January 12, 1980, Mr. Commissioner of the Japan Patent Office 1, Indication of the Case, 1982 Patent Application No. 185988゛2)
1. Name of Cleaning Liquid 3, Relation to Amendment Case Patent Applicant Name Canon Electronics Co., Ltd. 4, Agent - Telephone: 03 (268) 2481 (4)
0Drawing 6, Contents of amendment Figure 4

Claims (3)

[Claims] (1) A cleaning liquid used for cleaning a magnetic recording medium sliding part of a magnetic recording/reproducing device, which is characterized by being made by adding an organic oil to an organic solvent. (2) The organic solvent is aromatic hydrocarbons; chlorinated aromatic hydrocarbons; chlorinated aliphatic hydrocarbons such as methane, ethane, and ethylene derivatives; alcohols; esters;
Ethers; Canes; Glycol derivatives (cellosolves); Alicyclic carbide groups; Aliphatic hydrocarbons; Mixtures of aliphatic or aromatic hydrocarbons; Fluorochloro-substituted hydrocarbons ; Other cresol, carbon disulfide, N,
At least one of N-dimethylformaldehyde, etc.
The cleaning liquid according to claim 1, characterized in that the cleaning liquid consists of different types. (3) The organic oil consists of at least one of the following: a metal base consisting of a metal salt of a higher fatty acid; an ester of a higher fatty acid; a higher 4-alcohol; an amine; a silicone oil; a fatty acid amide, etc., and its addition to the organic solvent The ratio is approximately 0.01 to 20 to the organic solvent.
ilI'is-% is about 4NtJ4,
¥81 Cleaning liquid according to claim 1 or 2.