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    PRODUCTION OF INK FOR INK JET RECORDING
    41.
    发明专利
    PRODUCTION OF INK FOR INK JET RECORDING 失效

    公开(公告)号：JPH1060331A

    公开(公告)日：1998-03-03

    申请号：JP21353596

    申请日：1996-08-13

    Applicant: KAO CORP

    Inventor： ISHII MASUKAME ,  SAKUMA TADASHI ,  YANAGI HIDEKI ,  SUZUKI SHOICHI ,  WAKABAYASHI SHIGEMI ,  TSUJII YOSHIAKI ,  AIDA KENJI

    IPC: C09D11/00 ,  C09D11/02 ,  C09D11/023 ,  C09D11/033 ,  C09D11/037 ,  C09D11/322 ,  C09D11/324 ,  C09D11/326 ,  C09D11/38

    Abstract: PROBLEM TO BE SOLVED: To obtain a process for producing an ink for ink jet recording whereby a pigment can be dispersed with an improved dispersibility into particles with uniform particle sizes by subjecting a pigment dispersion to ultrasonic treatment at specified output and frequency. SOLUTION: A pigment dispersion contg. a pigment, a polymeric dispersant, a water-soluble solvent, and water is subjected to ultrasonic treatment at an output of 250-3,000W and a frequency of 20-50kHz to disperse the pigment. The polymeric dispersant used id pref. a (meth)acrylic acid deriv. copolymer, esp, one obtd. by copolymerizing a monomer represented by formula I (R1 and R2 are each H or lower alkyl; m1 is 0-2; AO is 2-3C oxyalkylene; n is 1-300; and X is H or lower alkyl) and a monomer (including its acid anhydride) represented by formula II [R3 to R5 are each H, lower alkyl, or (CH2 )m2 COOM2 (wherein M1 and M2 are each H, an alkali or alkaline earth metal, ammonium, or an amine, and m2 is 0-2].

    WATER-BASED PIGMENT INK
    43.
    发明专利
    WATER-BASED PIGMENT INK 失效

    公开(公告)号：JPH1046084A

    公开(公告)日：1998-02-17

    申请号：JP21026496

    申请日：1996-08-08

    Applicant: KAO CORP

    Inventor： WAKABAYASHI SHIGEMI ,  ISHII MASUKAME ,  SAKUMA TADASHI ,  YANAGI HIDEKI ,  SUZUKI SHOICHI ,  TSUJII YOSHIAKI ,  AIDA KENJI

    IPC: C09D11/00 ,  C09D11/023 ,  C09D11/033 ,  C09D11/037 ,  C09D11/10 ,  C09D11/102 ,  C09D11/106 ,  C09D11/107 ,  C09D11/108 ,  C09D11/322 ,  C09D11/324 ,  C09D11/326 ,  C09D11/38

    Abstract: PROBLEM TO BE SOLVED: To obtain the subject ink excellent in pigment dispersion stability and dryability, thus useful for ink jet printing use, comprising a pigment, (meth) acrylic acid derivative copolymer, aliphatic monohydric alcohol, water-soluble solvent and water. SOLUTION: This water-based pigment ink excellent in pigment dispersibility and ink dryability comprises (A) a pigment such as carbon black, (B) a copolymer from a (meth)acrylic acid derivative of formula I (R1 and R2 are each H or a lower alkyl; (m1 ) is an integer of 0-2; AO is a 2-3C oxyalkylene; (n) is an integer of 1-300; X is H or a lower alkyl) and a monomer of formula II [R3 to R5 are each H, a lower alkyl or a group of the formula (CH2 )m2 COOM2 (M2 is H, an alkali metal, alkaline earth metal, ammonium or amine; (m2 ) is an integer of 0-2); M1 is the same kind as M2 ], (C) an aliphatic monohydric alcohol (e.g. ethyl alcohol), (D) a water-soluble solvent (e.g. diethylene glycol), and water as aqueous medium.

    PRODUCTION OF MAGNETIC RECORDING MEDIUM
    44.
    发明专利
    PRODUCTION OF MAGNETIC RECORDING MEDIUM 失效

    公开(公告)号：JPH0935265A

    公开(公告)日：1997-02-07

    申请号：JP17980395

    申请日：1995-07-17

    Applicant: KAO CORP

    Inventor： MATSUO YUZO ,  KITAORI NORIYUKI ,  YOSHIDA OSAMU ,  MIZUNOYA HIROHIDE ,  SASAKI KATSUMI ,  WAKABAYASHI SHIGEMI ,  SHIGA AKIRA

    IPC: C23C14/24 ,  C23C14/30 ,  C23C14/56 ,  G11B5/85 ,  H01F41/20

    Abstract: PROBLEM TO BE SOLVED: To easily produce a high S-N ratio magnetic recording medium with magnetic layers having a multilayered magnetic thin film structure. SOLUTION: A substrate is transferred with plural can rolls arranged in a vacuum atmosphere and a magnetic metal is vapor-deposited on the substrate on each of the can rolls to form plural magnetic thin films on the substrate. The can rolls 13, 14 are different from each other in diameter. The can roll 13 on the upper stream side of the transfer path of the substrate 6 has a larger diameter than the can roll 14 on the downstream side and the ratio between the diameters of the rolls 13, 14 is 5:1 to 2:1, preferably 4:1 to 3:1.

    PRODUCTION OF MAGNETIC RECORDING MEDIUM AND DEVICE THEREFOR
    45.
    发明专利
    PRODUCTION OF MAGNETIC RECORDING MEDIUM AND DEVICE THEREFOR 失效

    公开(公告)号：JPH0927123A

    公开(公告)日：1997-01-28

    申请号：JP17213395

    申请日：1995-07-07

    Applicant: KAO CORP

    Inventor： WAKABAYASHI SHIGEMI ,  KITAORI NORIYUKI ,  YOSHIDA OSAMU ,  MIZUNOYA HIROHIDE ,  SASAKI KATSUMI ,  MATSUO YUZO ,  SHIGA AKIRA

    IPC: G11B5/66 ,  G11B5/738 ,  G11B5/85

    Abstract: PROBLEM TO BE SOLVED: To avoid such a problem that a material to be vapor deposited is wound up on a cooling can and to obtain a normal travelling state of the material to be vapor deposited by forming a conductive film on the material before a magnetic layer is formed. SOLUTION: This producing device 10 is equipped with a device 20 for formation of a conductive film which is connected to a vacuum chamber 1 through a connecting pipe 24. The device 20 for formation of a conductive film consists of a vacuum chamber 21 for formation of a conductive film which is connected to the vacuum chamber 1, a travelling device 22 disposed in the vacuum chamber so as to travel a continuous tape 5 as the material to be vapor deposited, a high frequency electric furnace 23 disposed beneath the tape 5, and a conductive material housed in the high frequency electric furnace 23. In this device, a high frequency current is applied on a coil 34 to heat an aluminum material in a crucible 33. The aluminum material is continuously molten and vaporized by the heat. The aluminum vapor deposits on the tape 5 while the tape 5 rotates along the circumference direction of a cooling can 32. During this process, an aluminum conductive film is formed on the tape 5.

    METHOD OF FORMING LUBRICATION LAYER FOR MAGNETIC RECORDING MEDIUM
    47.
    发明专利
    METHOD OF FORMING LUBRICATION LAYER FOR MAGNETIC RECORDING MEDIUM 失效

    公开(公告)号：JPH08161740A

    公开(公告)日：1996-06-21

    申请号：JP29845794

    申请日：1994-12-01

    Applicant: KAO CORP

    Inventor： KITAORI NORIYUKI ,  YOSHIDA OSAMU ,  MIZUNOYA HIROHIDE ,  SASAKI KATSUMI ,  MATSUO YUZO ,  WAKABAYASHI SHIGEMI ,  SHIGA AKIRA

    IPC: B05D1/28 ,  B05D5/08 ,  G11B5/84

    Abstract: PURPOSE: To achieve uniformity of a film thickness distribution by spraying and supplying a lubricating agent atomized by an ultrasonic wave to an applicator roll to be transferred and applied onto a magnetic layer of a magnetic recording medium. CONSTITUTION: In a magnetic recording medium 3 on the surface of which is formed a magnetic layer comprising a vacuum evaporated thin film made of ferromagnetic metal such as Co, Ni, Fe or an alloy thereof, an ultrasonic wave is applied to a lubricating agent to atomize by a sprayer, running between an the applicator roll 1 and a backup roll 4, comprising an ultrasonic oscillator 2, a vibrator, a horn and the like to be supplied to the applicator roll 1 by a nozzle or the like. The applicator roll 1 transfers the lubricating agent to be applied on the magnetic layer of the magnetic recording medium 3. The lubricating agent herein used is 0.001-1.0 by wt% of a solution in which perfluoropolyether with the molecular weight of 2,000-5,000 is dissolved in perfluorocarbon as solvent. The atomization of the solution by an ultrasonic wave enables coating thereof in a vacuum environment.

    MAGNETIC TAPE AND ITS PRODUCTION AND APPARATUS FOR PRODUCTION
    49.
    发明专利
    MAGNETIC TAPE AND ITS PRODUCTION AND APPARATUS FOR PRODUCTION 失效

    公开(公告)号：JPH08102065A

    公开(公告)日：1996-04-16

    申请号：JP23784494

    申请日：1994-09-30

    Applicant: KAO CORP

    Inventor： MIZUNOYA HIROHIDE ,  KITAORI NORIYUKI ,  YOSHIDA OSAMU ,  WAKABAYASHI SHIGEMI ,  SHIGA AKIRA

    IPC: G11B5/72 ,  G11B5/64 ,  G11B5/84

    Abstract: PURPOSE: To provide a prolonged life by cutting a base formed with a magnetic layer to a prescribed width in a vaccum vessel and forming protctive layers by an ECR plasma CVD method on the bases transported apart spaced intervals from each other. CONSTITUTION: A raw sheet 5 of the base formed with the magnetic layer is cut to the prescribed width by a slitter 1 to form tapes 6 which are transported via an expander roll 4 to a can roll 2. This expander roll 4 has a generator of an arch type slighyly larger in the diameter in the central part than both ends and the tapes 6 passing this roll are so constituted as to have the spacings parted from each other. The can roll 2 is traveled by carrying tapes 6 in the state of having the spacings parted from each other. The ECR plasma CVD device 3 converts gaseous raw materials contg. carbon atoms to plasma in this state. The tapes 6 are irradiated with this plasma. The protective layers consisting of diamond-like carbon are deposited not only on the magnetic layer surfaces of the respective tapes 6 but on the cut surfaces as well and, therefore, the progression of the deterioration from the cut surfaces is prevented.

    DEVICE FOR FORMATION OF LUBRICANT LAYER
    50.
    发明专利
    DEVICE FOR FORMATION OF LUBRICANT LAYER 失效

    公开(公告)号：JPH08102063A

    公开(公告)日：1996-04-16

    申请号：JP23784194

    申请日：1994-09-30

    Applicant: KAO CORP

    Inventor： SHIGA AKIRA ,  KITAORI NORIYUKI ,  YOSHIDA OSAMU ,  WAKABAYASHI SHIGEMI ,  MIZUNOYA HIROHIDE

    IPC: B05B17/06 ,  C23C14/58 ,  G11B5/84

    Abstract: PURPOSE: To uniformly form a lubricant layer with high productivity by spraying a lubricant on the surface of the material to be vapor deposited through a nozzle having a specified top shape and connected to an ultrasonic vibrator. CONSTITUTION: A synthetic resin tape 6 with a magnetic layer formed on its surface is traveled from a feeding roll 13 to a take-up roll 14 via a heating roll 18 in a vacuum chamber 1. An ultrasonic spraying device 3 consists of an ultrasonic vibrator 4, and nozzle 5 which vibrates through the horn. The top end of the nozzle 5 is formed in V-shaped slope having 90 to 160 deg. vertical angle and provided with plural ejection ports having 0.1mm diameter. A lubricant is supplied from a lubricant supplying device 11 to the plural injection ports of the nozzle through a needle valve 18 provided on a passage 17. The flow rate of the lubricant is controlled with a needle valve 18 in the passage 17, for example, to 30cc/min. The lubricant is atomized into uniform drops by the ultrasonic vibration and deposited on the magnetic layer. In a divided room 22, the lubricant is dried by a drying means comprising an IR lamp 21.

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