JPS6057585A - Magnetic recording medium - Google Patents

Abstract

PURPOSE:To improve the durability of a magnetic recording medium, by providing a jacket for containing a magnetic sheet and liners installed to parts on the inner surface of the jacket opposing to the magnetic sheet and a wetting agent is impregnated in at least a part of the area of the liner. CONSTITUTION:Rollers at each section are rotated in the directions shown by the arrows and a solvent 17 containing a wetting agent is impregnated in a nonwoven fabric 10 at the section of a roller 13. A material, such as fluoric oil, photosensitive resin, thermosetting resin, etc., which forms a weather-resistant film, is used as the wetting agent. After impregnating the solvent 17, the impregnated part is dried with an infrared lamp 18 or exposed to an ultraviolet lamp 18 and the nonwoven fabric 10 is wound around a roller 15. Liners 2 are brought into contact with the main body of the jacket by thermo compression bonding and the end stopping of the main body is performed by thermo compression bonding, and then, a magnetic sheet is put. When the jacket made in such a way is used, the coefficient of friction between a magnetic head and magnetic sheet is maintained at a low level, because the wetting agent is continuously supplied to the surface of the magnetic sheet from the liner while the magnetic sheet is rotated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetic recording medium used for recording and reproducing information.

Conventional Structure and Problems Conventionally, jackets for magnetic recording media (hereinafter referred to as jackets) have been used to hold magnetic sheets inside and improve rotational stability. A conventional jacket will be described below with reference to the drawings.

FIG. 1 shows a cross-sectional view of a conventional magnetic recording medium. In the figure, 1 is a jacket, 2 is a liner, 3 is a magnetic sheet, and 4 is a hub.

Here, the jacket 1, liner 2, magnetic sheet 3, and hub 4 will be collectively referred to as a magnetic recording medium.

Above J: The eel jacket 1 is made of vinyl chloride, and is chucked to the hub 4# spindle 1 hub (not shown) of the magnetic sheet 3 to stabilize running when the magnetic sheet 3 rotates. It has the function of preserving sex.

In addition, liner 2 is made of non-woven fabric, and jacket 1
The inside is lined with sushi.

This liner 2 has a function of removing fine powder generated by friction between the magnetic head and the magnetic sheet 3 and dust mixed in from the outside. Additionally, liquid or solid lubricants are applied to reduce magnetic friction.

However, when the magnetic sheet 3 is rotated, the coating on the magnetic sheet 3 becomes 68.
The thin metal film on the surface of the magnetic sheet 3 is scratched (preventing the stable running of the magnetic head), resulting in the head not being able to perform sufficient playback (14
It had the disadvantage of not being able to provide 1 power. Furthermore, when such a phenomenon occurs, not only the surface durability of the magnetic plate 3 is reduced, but also the durability of the magnetic spatula plate is significantly reduced.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned drawbacks and provides a magnetic recording medium that can improve the permanence by -1.

Structure of the Invention The present invention achieves the above objects, and consists of: a garden air sheet held in a holding furnace by B; a jacket containing the magnetic sheet; magnetism 7
- liner provided on the opposing part 11: (I
(ii) Further, there is provided a magnetic recording medium characterized in that at least a part of the liner is impregnated with a lubricant.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. m1. FIG. 2 is a schematic diagram showing the manufacturing process for an embodiment of the present invention. FIG. 3 shows the planar shape of the liner manufactured by the above manufacturing process.

In Fig. 2, 11 is a roller on which the nonwoven fabric 10 is applied, 12, 13, 14 is a roller for feeding the nonwoven fabric 10, 15 is a roller for measuring the nonwoven fabric 10, 16 is a basket, and 17 is a roller for dissolving the lubricant. It is a solvent.

The operation of the manufacturing process 447 for fully applying lubricant to the nonwoven fabric 10 in the apparatus configured as described above will be described below. Rotate the rollers of each part in the direction of the arrow, and use a weather-resistant coating such as non-woven fabric 10 curable resin or the like for roller 13' (XB).
! l', 17 After completely υ, dry with an infrared lamp 18 - (
Alternatively, the nonwoven fabric 10 is exposed to light using an ultraviolet lamp 18, and then the nonwoven fabric 10 is placed on the roller 5 (4). Here, the nonwoven fabric 10 is
Similarly, the lubricant can be impregnated with a lubricant by spraying a solvent on the outside/inside of the lubricant.

Next, we will explain the third ji l (C).
No. 31 No. 1 shows the nonwoven fabric manufactured in No. 1' cut into a predetermined shape. Flat part 21.2 of the liner
The size of 2 is almost the same as the size of the jacket body, and shows a flat 1rii shape cut with a die having chuck holes 2A, 27, intex parts 25.28, and head window parts 23.26 as openings. There is.

The above liner is adhered to the jacket body by thermocompression bonding, the ends of the jacket body are fixed by thermocompression bonding, and magnetism 7-1 is inserted. Its cross-sectional shape is similar to that shown in FIG. There is also a method in which the opening part of the liner is heat-pressed to the jacket body and then clarified into the above shape.

In this way, J-shaped jihe ketke is used (go, (1
“During the rotation of the B air sort, lubricant is constantly added to the surface of the magnetic sheet from the liner, so the coefficient of friction between the magnetic head and the magnetic note is kept low.This increases the durability of the magnetic sheet. In addition to improving the magnetic head's performance, it is also possible to improve the durability of the magnetic head. In addition, in terms of production: 1) Since conventional processes can be used even if -, it has the characteristic that it can be produced in low cost and in the same quantity as conventional methods.

Next, a second embodiment of the present invention will be described with reference to the drawings. In Fig. 4, the liner is in contact with the shark throat body, and the liner is attached to the shark throat 41 in the part other than the above-mentioned opening.
It shows all 1s and 1s of the 1 function track. This width is 11r1, which is approximately the same as the length of the window portion 42 in the radial direction of the magnetic sheet.

In the first embodiment, the lubricant is applied to the entire area of the liner, but in the second embodiment, as shown at 46, the liner has a door shape that is the entire width of the track in the radial direction and several centimeters in the circumferential direction. The liner is impregnated with lubricant only in that area.

In this embodiment, before the magnetic head contacts the magnetic sheet, the magnetic notebook is rotated to bring the magnetic sheet into contact with the region 46 impregnated with the lubricant, and the lubricant is added to the surface of the magnetic sheet in advance. Then do it. After that, the same effect as described in the first embodiment can be obtained even if the aerobic head is brought into contact.

In the second embodiment, since only a portion of the liner is impregnated with the lubricant, contamination of the thermocompression bonding equipment due to adhesion of the lubricant can be prevented to some extent during the process of thermocompression bonding the jacket body and the liner. .

In the second embodiment, the door-shaped area is impregnated with the lubricant, but this is not limited to the door-shaped area. It cannot be said that even if the pattern area is impregnated with lubricant, the same effect as in the second embodiment can be obtained.

Furthermore, it goes without saying that the magnetic sheet of the present invention includes magnetic disks and the like.

Effects of the Invention In short, the present invention includes a magnetic sheet held by a huff, a noyake note for storing the magnetic sort, and a liner provided on a portion of the inner peripheral surface of the draw noyake note facing the magnetic sheet, The present invention provides a magnetic recording medium characterized in that at least a part of the liner is impregnated with a lubricant, and the durability of the magnetic recording medium can be improved.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing a conventional magnetic recording medium, Fig. 2 is an overview of the manufacturing process when the liner of the magnetic recording medium of the present invention is impregnated with lubricity, and Fig. 3 is a manufacturing process manufactured by the above manufacturing method. FIG. 4 is a plan view of a liner that is another embodiment of the present invention. 1.41 ・Jacket, 2. River... Liner, 3.
...Magnetic sheet, 4...Hub, 21.22...
...Liner plane 7<1s, 23.26', 42.
...One head win? '113.24.27
．． 44... Chuck hole sound B-25, 28,
43...index section, 46...-Liner"2 f11"] Area impregnated with lubricant. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4 Figure 4 4j Written amendment 1 Indication of the case 1988 Patent Application No. 165508 2 Name of the invention Magnetic recording medium 3 Name of the person making the amendment f+・ (582) Matsushita Electric Industrial Co., Ltd. Representative name
Toshihiko Yamashita 4 Agent 571 Address 1006 Oaza Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Drawing 6, Contents of amendment

Claims (1)

[Claims] A magnetic sheet held by a hub, a jacket for storing the magnetic note, and a liner provided on an inner circumferential portion of the jacket facing the magnetic note, and at least one of the liners 7τ11 1. A magnetic recording medium characterized in that the region is impregnated with l and tl lubricants.