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公开(公告)号：JPH10218803A
公开(公告)日：1998-08-18
申请号：JP2522997
申请日：1997-02-07
Applicant: KAO CORP
Inventor： SHIGA AKIRA , KITAORI NORIYUKI , MIZUNOYA HIROHIDE
IPC: C07D317/54 , C07C19/08 , C07C43/13 , C07C69/708 , C10M105/50 , C10N40/18 , G11B5/72 , G11B5/725
Abstract: PROBLEM TO BE SOLVED: To obtain a new fluorine-containing compound soluble to a hydrocarbon-based solvent and excellent in lubricating characteristics. SOLUTION: This compound containing fluorine is a compound having a fluoroalkyl, an alkyl or an alkenyl and a polar group, and satisfying 4
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公开(公告)号：JPH10188258A
公开(公告)日：1998-07-21
申请号：JP34490196
申请日：1996-12-25
Applicant: KAO CORP
Inventor： KITAORI NORIYUKI , SHIGA AKIRA , MIYAMURA TAKESHI
Abstract: PROBLEM TO BE SOLVED: To obtain the magnetic recording medium having a superior S/N by satisfying the specific conditions for the coercive force and the thickness of the magnetic film of the magnetic recording medium having a supporting body and the film. SOLUTION: A magnetic film 2 having a thickness L of Y(Å) is provided on a non-magnetic supporting body 1. A coercive force Hc of the film 2 having the set thickness Y(Å) is X(Oe). Note that X and Y are designed to satisfy a condition, 1.0
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公开(公告)号：JPH10188257A
公开(公告)日：1998-07-21
申请号：JP34490096
申请日：1996-12-25
Applicant: KAO CORP
Inventor： KITAORI NORIYUKI , MIZUNOYA HIROHIDE , SHIGA AKIRA
Abstract: PROBLEM TO BE SOLVED: To increase the level of the reproduced output and to obtain a superior overwrite characteristic in the magnetic recording medium, in which a recording is conducted using the signals having a specific shortest recording wavelength, by specifying the thickness of the magnetic layer and the coercive force of the soft magnetic layer constituting an undercoat layer. SOLUTION: A soft magnetic layer (an undercoat layer) 2 having a 1 to 50Oe coercive force Hc is provided on a non-magnetic supporting body 1. A magnetic layer 3 having a thickness of L (Å) is provided on the layer 2. The thickness L of the layer 3 is set to 1/5 to 1/3 of a shortest recording wavelength λof the signals for a recording. Then, a protective film 4 is provided on a metallic and magnetic layer 3. If it is necessary, a lubricant layer 5 is provided. Moreover, a back coat layer 6 is provided, if so required. The layer 6 is formed by spraying the paint including carbon black and binder resin.
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公开(公告)号：JPH10105964A
公开(公告)日：1998-04-24
申请号：JP25422796
申请日：1996-09-26
Applicant: KAO CORP
Inventor： SHIGA AKIRA , KITAORI NORIYUKI , SASAKI KATSUMI , YOSHIDA OSAMU , ENDO KATSUMI , MIYAMURA TAKESHI
Abstract: PROBLEM TO BE SOLVED: To attain excellent head touch and to improve recording and reproducing characteristics and durability by providing a 2nd magnetic film on a 1st magnetic film and controlling incident angle of sticking particle to satisfy equations (1) and (2) at the time of film forming the magnetic films. SOLUTION: A supporting body 1 is introduced into a vacuum vessel 19b evacuated to 10 -10 Torr degree of vacuum after the 1st metallic magnetic film 2a is formed. And a magnetic metal is vaporized by irradiating a magnetic metallic material filled in a crucible 14b with electron beam from an electric gun 16b. The vaporized metallic particle is obliquely vapor-deposited on the surface of the 1st metallic magnetic film 2a on the supporting body 1 running along a cooling can roll 13b to film-form the 2nd metallic magnetic film 2b.
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公开(公告)号：JPH10105953A
公开(公告)日：1998-04-24
申请号：JP25679496
申请日：1996-09-27
Applicant: KAO CORP
Inventor： SHIGA AKIRA , KITAORI NORIYUKI , MIZUNOYA HIROHIDE
Abstract: PROBLEM TO BE SOLVED: To obtain a high output by making a medium into a magnetic record ing medium on which a signal is recorded and of which a difference between a signal output at the time of reproducing with a same speed as of recording and that at the time of reproducing with a speed two times as fast as of record ing is reduced. SOLUTION: In a magnetic recording medium having a magnetic layer famed on a tape form non-magnetic substrate, it is made possible to obtain a high output especially in frequencies of 20MHz or higher, by reducing a difference between a signal output at the time of reproducing with a same speed as of recording and that at the time of reproducing with a speed two times as fast as of recording. Here, it is preferable to use a signal of a wavelength of 0.50μm or shorter at the time of measuring a difference between outputs of recording and reproducing and it is recommended to select a wavelength so that a difference between the used signal and an output is within a range of 2.0-4.5dB.
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Patent Agency Ranking
公开(公告)号：JPH10105952A
公开(公告)日：1998-04-24
申请号：JP25679396
申请日：1996-09-27
Applicant: KAO CORP
Inventor： SHIGA AKIRA , KITAORI NORIYUKI , MIZUNOYA HIROHIDE
Abstract: PROBLEM TO BE SOLVED: To obtain a high output in high frequencies by reducing a difference of outputs between when recording/reproducing are performed in a normal running direction of a tape and when they are performed in the reverse direc tion. SOLUTION: A magnetic recording medium which is deposited on a tape-form non-magnetic substrate in a vacuum and has a magnetic layer with tilted columns, permits to obtain an high output in high frequencies by reducing a difference between an output at the time of recording/reproducing in a normal running direction of a tape and that at the time of recording/reproducing in the reverse direction. Thus, a high output magnetic tape is obtainable by even a narrow track width head. Here, it is preferable to use a signal of 0.50μm or shorter as a wavelength when a high frequency signal is recorded/reproduced on/from the magnetic recording medium and an output difference is measured, and it is recommended to select a wavelength so that the difference between the used signal and an output is 3.5dB or less.
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公开(公告)号：JPH10105947A
公开(公告)日：1998-04-24
申请号：JP25454496
申请日：1996-09-26
Applicant: KAO CORP
Inventor： KITAORI NORIYUKI , MIZUNOYA HIROHIDE , SHIGA AKIRA
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording medium having excellent running property by using a plastic film having specific resiliency expressed by stiffness and specific film thickness as a support. SOLUTION: A magnetic layer is formed on one surface of the plastic film having N/μm stiffness per 1μm thickness and 3.0-4.5μm thickness by vacuum film-forming method and a back coat layer is formed on the opposite surface of the magnetic layer on the film. As a result, the magnetic recording medium capable of keeping excellent running property is obtained by giving the adequate stiffness to the whole magnetic recording medium without using an aramid or the like, which is higher in stiffness, but extremely expensive.
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公开(公告)号：JPH1074320A
公开(公告)日：1998-03-17
申请号：JP22964596
申请日：1996-08-30
Applicant: KAO CORP
Inventor： SASAKI KATSUMI , KITAORI NORIYUKI , YOSHIDA OSAMU , ENDO KATSUMI , SHIGA AKIRA , MIYAMURA TAKESHI
Abstract: PROBLEM TO BE SOLVED: To reduce damage and to enable many kinds of measurement on one sample and to eliminate variance of measured data on the other hand by measuring characteristic of a magnetic recording medium put into a liquid. SOLUTION: A rotary drum wound with a magnetic tape M is lowered to dip into the liquid in a bath 1, and a stepping motor 4 is turned on to rotate the rotary drum 2. At the same time, an operating mechanism 7 is operated to bring a magnetic head 5 into contact with the magnetic tape M wound around the rotary drum 2, and an information signal recorded on the magnetic tape M is detected by the magnetic head 5, and is reproduced by a reproducing means to obtain a reproduced signal, and based on this signal, evaluation of the magnetic tape M is performed.
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公开(公告)号：JPH1034593A
公开(公告)日：1998-02-10
申请号：JP19683696
申请日：1996-07-26
Applicant: KAO CORP
Inventor： SASAKI KATSUMI , KITAORI NORIYUKI , YOSHIDA OSAMU , ENDO KATSUMI , SHIGA AKIRA , MIYAMURA TAKESHI
Abstract: PROBLEM TO BE SOLVED: To cut material to be cut such as raw cloth into uniform width by providing one shaft with a plurality of thick cutting edges at specified spaces while providing the other shaft, parallel with one shaft, with a plurality of thin cutting edges at specified spaces, and forming intake holes in the thick cutting edges to suck the material to be cut. SOLUTION: A shaft 2 is provided with a plurality of thin cutting edges 1 at specified spaces, and a shaft 4 parallel with the shaft 2 is provided with a plurality of thick cutting edges 3 at the equal pitch to the thin cutting edges 1 so that the cutting edges 1, 3 are arranged in the contact state of the mutual side edge parts of the thin cutting edges 1 and thick cutting edges 3. The shaft 2 and the shaft 4 are rotated respectively retrorse at constant speed to cut raw cloth into specified width. In this case, intake holes 5 leading to internal space of the shaft 4 from the outer peripheral surface side are formed in the thick cutting edges 3. Air around the thick cutting edges 3 is sucked into the internal space of the shaft 4 from the intake holes 5 to suck the raw cloth to the surface of the thick cutting edges 3, and the sucked air is blown off between the raw cloth and the thick cutting edges 3 from an air nozzle 9 to separate the raw cloth easily from the thick cutting edges 3.
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公开(公告)号：JPH1031819A
公开(公告)日：1998-02-03
申请号：JP18734796
申请日：1996-07-17
Applicant: KAO CORP
Inventor： KITAORI NORIYUKI , SASAKI KATSUMI , YOSHIDA OSAMU , ENDO KATSUMI , SHIGA AKIRA , MIYAMURA TAKESHI
Abstract: PROBLEM TO BE SOLVED: To provide a process for producing a magnetic recording medium by which the degradation in the traveling property of a base and the damage by the heat of the base are suppressed at the time of film formation and a magnetic film having high output is obtainable. SOLUTION: This method forms the magnetic film by irradiating a magnetic material source with an electron beam and diagonally evaporating evaporated particles on the traveling base 1. At this time, the min. incident angle at the time the particles are deposited by evaporation on the base 1 is specified to 50 to 70 deg. and the irradiation direction of the electron beam and the traveling direction of the base 1 is forward. The min. distance (L) between the electron beam and the base 1 and the output (P) of an electron gun for irradiation with the electron beam are so set as to satisfy the conditions of the following equations: The equations are L>=10cm at the time of 10kW =15cm at the time of 50kW =20cm at the time of 100kW =25cm at the time of 200kW
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