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公开(公告)号：JPS6386113A
公开(公告)日：1988-04-16
申请号：JP23068986
申请日：1986-09-29
Applicant: TOSHIBA CORP
Inventor： YOSHIOKA SHINPEI , MATSUNO KUNIO , ITO TAKEO
IPC: C09D4/00 , C09D133/00 , C09D175/04 , G11B5/73 , G11B5/735 , G11B5/738
Abstract: PURPOSE:To improve an antistatic property and adhesiveness by confining the range of the spectral ray transmittance and total ray transmittance of a UV curing type under coat layer between a base and magnetic layer or between back coat layers. CONSTITUTION:The UV curing type under coat layer having the spectral ray transmittance of the under coat layer alone ranging 500-700nm measurement wavelength, >=50% total ray transmittance and OMEGA surface specific resistivity of the under coat layer and further, contg. a photopolymn. initiator in a 1-20pts.wt range per 100pts.wt. total weight of the binder is provided between the nonmagnetic base and the magnetic layer or between the back coat layers. Such under coat layer is obtd. by curing the coating compd., which consists essentially of a UV curing resin of a vinyl group, acryl group, etc., and is compounded with a filler, additive, solvent, etc., and curing the same by UV rays.
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公开(公告)号：JPS62219233A
公开(公告)日：1987-09-26
申请号：JP6110686
申请日：1986-03-19
Applicant: TOSHIBA CORP
Inventor： YOSHIOKA SHINPEI , ITO TAKEO
Abstract: PURPOSE:To obtain a good-quality magnetic recording medium by forming a back coat layer on the surface opposite from the surface on which a magnetic layer is formed. CONSTITUTION:An under coat layer curable by UV rays is formed on a nonmagnetic substrate prior to the formation of the back coat layer on the nonmagnetic substrate. Said layer is cured by the irradiation of UV rays. The thermal deformation of the nonmagnetic substrate by the irradiation of UV rays which is considerable in the case of using the nonmagnetic substrate formed with the conventional back coat layer is thereby decreased. Since the irradiation quantity of the UV rays can be made larger than heretofore, the curing condition of the under coat layer can be improved. The under coat layer and the magnetic layer can be continuously formed in the same line by taking advantage of the characteristics of the under coat layer curable by UV rays which permits curing in a short period at the time of forming the magnetic layer on the under coat layer in succession thereof. This method is adequate in terms of production efficiency as well.
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公开(公告)号：JPS62219232A
公开(公告)日：1987-09-26
申请号：JP6110586
申请日：1986-03-19
Applicant: TOSHIBA CORP
Inventor： YOSHIOKA SHINPEI , ITO TAKEO
Abstract: PURPOSE:To obtain a good-quality magnetic recording medium by decreasing the thermal deformation of the medium at the time of curing an under coat layer by irradiation of UV rays. CONSTITUTION:The under coat layer 8 curable by UV rays is formed on a nonmagnetic substrate prior to the formation of a back coat layer 10 on the nonmagnetic substrate. The layer 8 is cured by the irradiation of UV rays. The thermal deformation of the nonmagnetic substrate by the irradiation of UV rays which is considerable in the case of using the nonmagnetic substrate formed with the conventional under coat layer is thereby decreased and since the irradiation quantity of the UV rays can be made larger than heretofore, the curing addition of the under coat layer 10 is improved.
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公开(公告)号：JPS6273535A
公开(公告)日：1987-04-04
申请号：JP21216985
申请日：1985-09-27
Applicant: TOSHIBA CORP
Inventor： MATSUDA SHUZO , ITO TAKEO , KOIKE NORIO
Abstract: PURPOSE:To reduce a deterioration of emission property of a cathode-ray tube owing to a long service, by furnishing a substance of a specific ratio of surface area inside the cathode-ray tube, and specifying the surface area of the substance per a unit volume in the tube. CONSTITUTION:By feeding a substance with a surface area ratio more than 10m /g and less than 1,100m /g inside a cathode-ray tube, to make the surface area of the substance more than 2.2X10 m /cm and less than 2.8X10 m /cm per a unit volume of the tube, hydrocarbon and the other gas in the cathode-ray tube can be absorbed to the surface of the substance, and the emission surviving rate is improved broadly. Therefore, the service life of the CRT is extensively improved, operating correctly for a longer period, and an excellent picture can be reproduced.
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公开(公告)号：JPS6266532A
公开(公告)日：1987-03-26
申请号：JP20441385
申请日：1985-09-18
Applicant: TOSHIBA CORP
Inventor： SAGO SEIJI , ITO TAKEO
IPC: H01J9/227
Abstract: PURPOSE:To prevent a phosphor powder from scattering or cohering during formation of the fluorescent screen of a cathode-ray tube by making the outer surface of a face plate in close contact with the side wall of a phosphor case so as to form a sealed space and depositing the phosphor powder on an adhesive surface formed on the inner surface of the face plate. CONSTITUTION:A phosphor case 4 which contains a blue color phosphor 3 is attached to a rotary support 2 by moving the case 4 upward in the direction indicated by an arrow 10 until the sealing surface of a face plate 1 becomes in close contact with the side wall of the phosphor case 4. As the result, the opening of the case 4 becomes in close contact with the sealing surface of the face plate 1 and a sealed space is formed by the inner surfaces of the face plate 1 and the case 4. Since the blue color phosphor 3 is located in the above sealed space, there is no possibility for phosphor powder to scatter. After that, the slanting movement of a rotary shaft 6 is stopped and the face plate 1 is rotated about 100 times. As the result, the blue color phosphor 3 homogeneously adheres to a patterned adhesive surface formed on the inner surface of the face plate 1. By the means mentioned above, the phosphor powder is deposited on the adhesive surface formed on the inner surface of the face plate 1.
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Patent Agency Ranking
公开(公告)号：JPS6245683A
公开(公告)日：1987-02-27
申请号：JP18393485
申请日：1985-08-23
Applicant: TOSHIBA CORP
Inventor： KOIKE NORIO , ITO TAKEO , MATSUDA SHUZO , SAGO SEIJI
Abstract: PURPOSE:To improve the brightness, contrast, etc., by preparing a cathode ray tube having a phosphor layer comprised of phosphor particles having a pigment deposited thereon in such a manner that the pigment is deposited in a state of dispersion in a ceramic film having a small refractive index. CONSTITUTION:A pigment which selectively exhibits a high degree of reflection in the same region as the luminescent color of phosphor particles 11 used (e.g., blue pigment comprising cobalt aluminate) is mixed with an ethanol soln. of an alcoholate compd. of silicon to prepare a pigment dispersion. The pigment dispersion is mixed with the particles of a phosphor (e.g., ZnS:AG,Cl blue phosphor). The mixture is calcined to form a ceramic film comprising an amorphous silica film 13 contg. pigment 12 dispersed therein on the surface of the phosphor particles 11. A phosphor layer comprising the phosphor thus obtd. is formed on the inside surface of a panel, followed by provision of an electron gun which emits cathode rays, thereby obtaining an intended cathode ray tube. This improves the reflection on the surface of the pigment 13 and adhesion of the pigment to the phosphor 11.
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公开(公告)号：JPS6228928A
公开(公告)日：1987-02-06
申请号：JP16775485
申请日：1985-07-31
Applicant: TOSHIBA CORP
Inventor： IWAI TAKAYOSHI , YOSHIOKA SHINPEI , OKANO SUMIO , YUKITANI MACHIKO , MATSUNO KUNIO , ITO TAKEO
Abstract: PURPOSE:To improve the antistatic property of the undercoat layer and the adhesion to a carrier by providing a radiation-curing undercoat layer between the nonmagnetic carrier and the magnetic layer or the backcoat layer, incorporating an SnO2 filler and a photopolymerization initiator into the layer to provide specified spectral transmittance and irradiating UV rays to cure the layer. CONSTITUTION:A radiation-curing undercoat layer is provided between a nonmagnetic carrier and a magnetic layer or between the nonmagnetic carrier and a backcoat layer to form the magnetic recording medium. In the medium, 10-1,000pts.wt. SnO2 filler (other electrically conductive fillers can be jointly used) is added to 100pts.wt. total binder to regulate the total transmittance of the spectral transmittance at 365nm wavelength to >=5%. Furthermore, 1-20pts. photopolymerization initiator is added to 100pts. binder and the binder is cured by UV rays. Consequently, the undercoat layer having a sufficient antistatic property is obtained and a magnetic recording medium having excellent adhesion to the nonmagnetic carrier can be obtained.
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公开(公告)号：JPS626431A
公开(公告)日：1987-01-13
申请号：JP14149685
申请日：1985-06-29
Applicant: TOSHIBA CORP
Inventor： YOSHIOKA SHINPEI , OKANO SUMIO , IWAI TAKAYOSHI , YUKITANI MACHIKO , MATSUNO KUNIO , ITO TAKEO
IPC: C09D101/18 , C09D4/00 , C09D127/06 , C09D129/14 , C09D163/00 , C09D167/00 , C09D175/04 , G11B5/73 , G11B5/738
Abstract: PURPOSE:To improve radiation curability by compounding a binder consisting of a thermoplastic resin and epoxy (meth) acrylate oligomer and carbon black under specific conditions in an undercoat layer. CONSTITUTION:The carbon black having >=500m /g surface area by a nitrogen adsorption method is compounded in a 5-25pts.wt. range with 100pts.wt. total of the binder consisting of the thermoplastic resin of which the number obtd. by multiplying the number of the (meth) acryloyl group in a molecule by 100 and dividing the result thereof by the molt.wt. is =3 and such mixture is incorporated into the undercoat layer and is cured by the irradiation of radiation. The radiation curability of the undercoat layer is thereby improved and the surface smoothness of a magnetic layer is improved as well.
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公开(公告)号：JPS61243641A
公开(公告)日：1986-10-29
申请号：JP8441185
申请日：1985-04-22
Applicant: TOSHIBA CORP
Inventor： ITO TAKEO , KOIKE NORIO
IPC: H01J29/32
Abstract: PURPOSE:To improve the brightness and contrast of fluorescent screen while to eliminate uneven brightness by covering the surface of fluorescent particles constituting a fluorescent screen with filter film thereby suppressing the energy loss of electron beam due to the filter particles to the minimum while preventing drop-out from the fluorescent particles. CONSTITUTION:The fluorescent screen is composed of fluorescent particle layer having specific grain size where the surface of the fluorescent particle is covered with a filter film of same system color with the light to be emitted from the fluorescent particles. For example, a filter film 31 is formed onto the surface of fluorescent particle 30 conditioned to have the average grain size of 3-20mum. The thickness of the filter film 31 can be selected properly with correspondence to the excitation energy of electron beam to be smaller than 1.5mum or 2mum, respectively for 25kV and 30kV. The filter film 31 is formed as a continuous glass layer or a partially discontinuous layer onto the surface of the fluorescent particles 30 of metal oxide film.
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公开(公告)号：JPS61243640A
公开(公告)日：1986-10-29
申请号：JP8441085
申请日：1985-04-22
Applicant: TOSHIBA CORP
Inventor： ITO TAKEO
Abstract: PURPOSE:To improve the brightness while to improve the contrast through improvement of outer light reflection factor by containing filter particles in fluorescent particles for forming a fluorescent screen. CONSTITUTION:Fluorescent material layer for emitting red light is composed of fluorescent particles of europium reactivating acid yttrium sulfide containing red filter particles composed of iron oxide red. In other word, the fluorescent particles 51 are composed of micro crystals having average grain size of 5-20mum and the filter particles 52 are encapsulated in said crystals. Since the filter is internally arranged, the electron beam 50 will transmit deep (t2) into the fluorescent particle 51 thus to improve the excitation efficiency. While with respect to the external light absorbing capacity, the filter particle 52 composed of iron red oxide has the reflective index near to that of the fluorescent material thereby the light is never reflected at the filter in the fluorescent particle but the external light entered into the fluorescent particle is caught and absorbed.
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